/* Subroutines used for code generation on IBM RS/6000. Copyright (C) 1991, 93-7, 1998 Free Software Foundation, Inc. Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) This file is part of GNU CC. GNU CC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU CC; see the file COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "config.h" #include "system.h" #include "rtl.h" #include "regs.h" #include "hard-reg-set.h" #include "real.h" #include "insn-config.h" #include "conditions.h" #include "insn-flags.h" #include "insn-attr.h" #include "flags.h" #include "recog.h" #include "expr.h" #include "obstack.h" #include "tree.h" #include "except.h" #include "function.h" #include "output.h" #include "toplev.h" #ifndef TARGET_NO_PROTOTYPE #define TARGET_NO_PROTOTYPE 0 #endif extern char *language_string; extern int profile_block_flag; #define min(A,B) ((A) < (B) ? (A) : (B)) #define max(A,B) ((A) > (B) ? (A) : (B)) /* Target cpu type */ enum processor_type rs6000_cpu; struct rs6000_cpu_select rs6000_select[3] = { /* switch name, tune arch */ { (char *)0, "--with-cpu=", 1, 1 }, { (char *)0, "-mcpu=", 1, 1 }, { (char *)0, "-mtune=", 1, 0 }, }; /* Set to non-zero by "fix" operation to indicate that itrunc and uitrunc must be defined. */ int rs6000_trunc_used; /* Set to non-zero once they have been defined. */ static int trunc_defined; /* Set to non-zero once AIX common-mode calls have been defined. */ static int common_mode_defined; /* Save information from a "cmpxx" operation until the branch or scc is emitted. */ rtx rs6000_compare_op0, rs6000_compare_op1; int rs6000_compare_fp_p; #ifdef USING_SVR4_H /* Label number of label created for -mrelocatable, to call to so we can get the address of the GOT section */ int rs6000_pic_labelno; int rs6000_pic_func_labelno; /* Which abi to adhere to */ char *rs6000_abi_name = RS6000_ABI_NAME; /* Semantics of the small data area */ enum rs6000_sdata_type rs6000_sdata = SDATA_DATA; /* Which small data model to use */ char *rs6000_sdata_name = (char *)0; #endif /* Whether a System V.4 varargs area was created. */ int rs6000_sysv_varargs_p; /* ABI enumeration available for subtarget to use. */ enum rs6000_abi rs6000_current_abi; /* Offset & size for fpmem stack locations used for converting between float and integral types. */ int rs6000_fpmem_offset; int rs6000_fpmem_size; /* Debug flags */ char *rs6000_debug_name; int rs6000_debug_stack; /* debug stack applications */ int rs6000_debug_arg; /* debug argument handling */ /* Flag to say the TOC is initialized */ int toc_initialized; /* Default register names. */ char rs6000_reg_names[][8] = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "mq", "lr", "ctr","ap", "0", "1", "2", "3", "4", "5", "6", "7", "fpmem" }; #ifdef TARGET_REGNAMES static char alt_reg_names[][8] = { "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7", "%r8", "%r9", "%r10", "%r11", "%r12", "%r13", "%r14", "%r15", "%r16", "%r17", "%r18", "%r19", "%r20", "%r21", "%r22", "%r23", "%r24", "%r25", "%r26", "%r27", "%r28", "%r29", "%r30", "%r31", "%f0", "%f1", "%f2", "%f3", "%f4", "%f5", "%f6", "%f7", "%f8", "%f9", "%f10", "%f11", "%f12", "%f13", "%f14", "%f15", "%f16", "%f17", "%f18", "%f19", "%f20", "%f21", "%f22", "%f23", "%f24", "%f25", "%f26", "%f27", "%f28", "%f29", "%f30", "%f31", "mq", "lr", "ctr", "ap", "%cr0", "%cr1", "%cr2", "%cr3", "%cr4", "%cr5", "%cr6", "%cr7", "fpmem" }; #endif #ifndef MASK_STRICT_ALIGN #define MASK_STRICT_ALIGN 0 #endif /* Override command line options. Mostly we process the processor type and sometimes adjust other TARGET_ options. */ void rs6000_override_options (default_cpu) char *default_cpu; { size_t i, j; struct rs6000_cpu_select *ptr; /* Simplify the entries below by making a mask for any POWER variant and any PowerPC variant. */ #define POWER_MASKS (MASK_POWER | MASK_POWER2 | MASK_MULTIPLE | MASK_STRING) #define POWERPC_MASKS (MASK_POWERPC | MASK_PPC_GPOPT \ | MASK_PPC_GFXOPT | MASK_POWERPC64) #define POWERPC_OPT_MASKS (MASK_PPC_GPOPT | MASK_PPC_GFXOPT) static struct ptt { char *name; /* Canonical processor name. */ enum processor_type processor; /* Processor type enum value. */ int target_enable; /* Target flags to enable. */ int target_disable; /* Target flags to disable. */ } processor_target_table[] = {{"common", PROCESSOR_COMMON, MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_MASKS}, {"power", PROCESSOR_POWER, MASK_POWER | MASK_MULTIPLE | MASK_STRING, MASK_POWER2 | POWERPC_MASKS | MASK_NEW_MNEMONICS}, {"power2", PROCESSOR_POWER, MASK_POWER | MASK_POWER2 | MASK_MULTIPLE | MASK_STRING, POWERPC_MASKS | MASK_NEW_MNEMONICS}, {"powerpc", PROCESSOR_POWERPC, MASK_POWERPC | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"rios", PROCESSOR_RIOS1, MASK_POWER | MASK_MULTIPLE | MASK_STRING, MASK_POWER2 | POWERPC_MASKS | MASK_NEW_MNEMONICS}, {"rios1", PROCESSOR_RIOS1, MASK_POWER | MASK_MULTIPLE | MASK_STRING, MASK_POWER2 | POWERPC_MASKS | MASK_NEW_MNEMONICS}, {"rsc", PROCESSOR_PPC601, MASK_POWER | MASK_MULTIPLE | MASK_STRING, MASK_POWER2 | POWERPC_MASKS | MASK_NEW_MNEMONICS}, {"rsc1", PROCESSOR_PPC601, MASK_POWER | MASK_MULTIPLE | MASK_STRING, MASK_POWER2 | POWERPC_MASKS | MASK_NEW_MNEMONICS}, {"rios2", PROCESSOR_RIOS2, MASK_POWER | MASK_MULTIPLE | MASK_STRING | MASK_POWER2, POWERPC_MASKS | MASK_NEW_MNEMONICS}, {"401", PROCESSOR_PPC403, MASK_POWERPC | MASK_SOFT_FLOAT | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"403", PROCESSOR_PPC403, MASK_POWERPC | MASK_SOFT_FLOAT | MASK_NEW_MNEMONICS | MASK_STRICT_ALIGN, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"505", PROCESSOR_MPCCORE, MASK_POWERPC | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"601", PROCESSOR_PPC601, MASK_POWER | MASK_POWERPC | MASK_NEW_MNEMONICS | MASK_MULTIPLE | MASK_STRING, MASK_POWER2 | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"602", PROCESSOR_PPC603, MASK_POWERPC | MASK_PPC_GFXOPT | MASK_NEW_MNEMONICS, POWER_MASKS | MASK_PPC_GPOPT | MASK_POWERPC64}, {"603", PROCESSOR_PPC603, MASK_POWERPC | MASK_PPC_GFXOPT | MASK_NEW_MNEMONICS, POWER_MASKS | MASK_PPC_GPOPT | MASK_POWERPC64}, {"603e", PROCESSOR_PPC603, MASK_POWERPC | MASK_PPC_GFXOPT | MASK_NEW_MNEMONICS, POWER_MASKS | MASK_PPC_GPOPT | MASK_POWERPC64}, {"ec603e", PROCESSOR_PPC603, MASK_POWERPC | MASK_SOFT_FLOAT | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"604", PROCESSOR_PPC604, MASK_POWERPC | MASK_PPC_GFXOPT | MASK_NEW_MNEMONICS, POWER_MASKS | MASK_PPC_GPOPT | MASK_POWERPC64}, {"604e", PROCESSOR_PPC604e, MASK_POWERPC | MASK_PPC_GFXOPT | MASK_NEW_MNEMONICS, POWER_MASKS | MASK_PPC_GPOPT | MASK_POWERPC64}, {"620", PROCESSOR_PPC620, MASK_POWERPC | MASK_PPC_GFXOPT | MASK_NEW_MNEMONICS, POWER_MASKS | MASK_PPC_GPOPT}, {"801", PROCESSOR_MPCCORE, MASK_POWERPC | MASK_SOFT_FLOAT | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"821", PROCESSOR_MPCCORE, MASK_POWERPC | MASK_SOFT_FLOAT | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"823", PROCESSOR_MPCCORE, MASK_POWERPC | MASK_SOFT_FLOAT | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}, {"860", PROCESSOR_MPCCORE, MASK_POWERPC | MASK_SOFT_FLOAT | MASK_NEW_MNEMONICS, POWER_MASKS | POWERPC_OPT_MASKS | MASK_POWERPC64}}; size_t ptt_size = sizeof (processor_target_table) / sizeof (struct ptt); int multiple = TARGET_MULTIPLE; /* save current -mmultiple/-mno-multiple status */ int string = TARGET_STRING; /* save current -mstring/-mno-string status */ profile_block_flag = 0; /* Identify the processor type */ rs6000_select[0].string = default_cpu; rs6000_cpu = PROCESSOR_DEFAULT; for (i = 0; i < sizeof (rs6000_select) / sizeof (rs6000_select[0]); i++) { ptr = &rs6000_select[i]; if (ptr->string != (char *)0 && ptr->string[0] != '\0') { for (j = 0; j < ptt_size; j++) if (! strcmp (ptr->string, processor_target_table[j].name)) { if (ptr->set_tune_p) rs6000_cpu = processor_target_table[j].processor; if (ptr->set_arch_p) { target_flags |= processor_target_table[j].target_enable; target_flags &= ~processor_target_table[j].target_disable; } break; } if (i == ptt_size) error ("bad value (%s) for %s switch", ptr->string, ptr->name); } } /* If we are optimizing big endian systems for space, use the store multiple instructions. */ if (BYTES_BIG_ENDIAN && optimize_size) target_flags |= MASK_MULTIPLE; /* If -mmultiple or -mno-multiple was explicitly used, don't override with the processor default */ if (TARGET_MULTIPLE_SET) target_flags = (target_flags & ~MASK_MULTIPLE) | multiple; /* If -mstring or -mno-string was explicitly used, don't override with the processor default */ if (TARGET_STRING_SET) target_flags = (target_flags & ~MASK_STRING) | string; /* Don't allow -mmultiple or -mstring on little endian systems, because the hardware doesn't support the instructions used in little endian mode */ if (!BYTES_BIG_ENDIAN) { if (TARGET_MULTIPLE) { target_flags &= ~MASK_MULTIPLE; if (TARGET_MULTIPLE_SET) warning ("-mmultiple is not supported on little endian systems"); } if (TARGET_STRING) { target_flags &= ~MASK_STRING; if (TARGET_STRING_SET) warning ("-mstring is not supported on little endian systems"); } } if (flag_pic && (DEFAULT_ABI == ABI_AIX)) { warning ("-f%s ignored for AIX (all code is position independent)", (flag_pic > 1) ? "PIC" : "pic"); flag_pic = 0; } /* Set debug flags */ if (rs6000_debug_name) { if (!strcmp (rs6000_debug_name, "all")) rs6000_debug_stack = rs6000_debug_arg = 1; else if (!strcmp (rs6000_debug_name, "stack")) rs6000_debug_stack = 1; else if (!strcmp (rs6000_debug_name, "arg")) rs6000_debug_arg = 1; else error ("Unknown -mdebug-%s switch", rs6000_debug_name); } #ifdef TARGET_REGNAMES /* If the user desires alternate register names, copy in the alternate names now. */ if (TARGET_REGNAMES) bcopy ((char *)alt_reg_names, (char *)rs6000_reg_names, sizeof (rs6000_reg_names)); #endif #ifdef SUBTARGET_OVERRIDE_OPTIONS SUBTARGET_OVERRIDE_OPTIONS; #endif } void optimization_options (level, size) int level; int size ATTRIBUTE_UNUSED; { #ifdef HAIFA /* When optimizing, enable use of BCT instruction. */ if (level >= 1) flag_branch_on_count_reg = 1; #endif } /* Do anything needed at the start of the asm file. */ void rs6000_file_start (file, default_cpu) FILE *file; char *default_cpu; { size_t i; char buffer[80]; char *start = buffer; struct rs6000_cpu_select *ptr; if (flag_verbose_asm) { sprintf (buffer, "\n%s rs6000/powerpc options:", ASM_COMMENT_START); rs6000_select[0].string = default_cpu; for (i = 0; i < sizeof (rs6000_select) / sizeof (rs6000_select[0]); i++) { ptr = &rs6000_select[i]; if (ptr->string != (char *)0 && ptr->string[0] != '\0') { fprintf (file, "%s %s%s", start, ptr->name, ptr->string); start = ""; } } #ifdef USING_SVR4_H switch (rs6000_sdata) { case SDATA_NONE: fprintf (file, "%s -msdata=none", start); start = ""; break; case SDATA_DATA: fprintf (file, "%s -msdata=data", start); start = ""; break; case SDATA_SYSV: fprintf (file, "%s -msdata=sysv", start); start = ""; break; case SDATA_EABI: fprintf (file, "%s -msdata=eabi", start); start = ""; break; } if (rs6000_sdata && g_switch_value) { fprintf (file, "%s -G %d", start, g_switch_value); start = ""; } #endif if (*start == '\0') fputs ("\n", file); } } /* Create a CONST_DOUBLE from a string. */ struct rtx_def * rs6000_float_const (string, mode) char *string; enum machine_mode mode; { REAL_VALUE_TYPE value = REAL_VALUE_ATOF (string, mode); return immed_real_const_1 (value, mode); } /* Return non-zero if this function is known to have a null epilogue. */ int direct_return () { if (reload_completed) { rs6000_stack_t *info = rs6000_stack_info (); if (info->first_gp_reg_save == 32 && info->first_fp_reg_save == 64 && !info->lr_save_p && !info->cr_save_p && !info->push_p) return 1; } return 0; } /* Returns 1 always. */ int any_operand (op, mode) register rtx op ATTRIBUTE_UNUSED; enum machine_mode mode ATTRIBUTE_UNUSED; { return 1; } /* Returns 1 if op is the count register */ int count_register_operand(op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { if (GET_CODE (op) != REG) return 0; if (REGNO (op) == COUNT_REGISTER_REGNUM) return 1; if (REGNO (op) > FIRST_PSEUDO_REGISTER) return 1; return 0; } /* Returns 1 if op is memory location for float/int conversions that masquerades as a register. */ int fpmem_operand(op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { if (GET_CODE (op) != REG) return 0; if (FPMEM_REGNO_P (REGNO (op))) return 1; #if 0 if (REGNO (op) > FIRST_PSEUDO_REGISTER) return 1; #endif return 0; } /* Return 1 if OP is a constant that can fit in a D field. */ int short_cint_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return ((GET_CODE (op) == CONST_INT && (unsigned HOST_WIDE_INT) (INTVAL (op) + 0x8000) < 0x10000) || GET_CODE (op) == CONSTANT_P_RTX); } /* Similar for a unsigned D field. */ int u_short_cint_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return ((GET_CODE (op) == CONST_INT && (INTVAL (op) & (~ (HOST_WIDE_INT) 0xffff)) == 0) || GET_CODE (op) == CONSTANT_P_RTX); } /* Return 1 if OP is a CONST_INT that cannot fit in a signed D field. */ int non_short_cint_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return (GET_CODE (op) == CONST_INT && (unsigned HOST_WIDE_INT) (INTVAL (op) + 0x8000) >= 0x10000); } /* Returns 1 if OP is a register that is not special (i.e., not MQ, ctr, or lr). */ int gpc_reg_operand (op, mode) register rtx op; enum machine_mode mode; { return (register_operand (op, mode) && (GET_CODE (op) != REG || (REGNO (op) >= 67 && !FPMEM_REGNO_P (REGNO (op))) || REGNO (op) < 64)); } /* Returns 1 if OP is either a pseudo-register or a register denoting a CR field. */ int cc_reg_operand (op, mode) register rtx op; enum machine_mode mode; { return (register_operand (op, mode) && (GET_CODE (op) != REG || REGNO (op) >= FIRST_PSEUDO_REGISTER || CR_REGNO_P (REGNO (op)))); } /* Returns 1 if OP is either a constant integer valid for a D-field or a non-special register. If a register, it must be in the proper mode unless MODE is VOIDmode. */ int reg_or_short_operand (op, mode) register rtx op; enum machine_mode mode; { return short_cint_operand (op, mode) || gpc_reg_operand (op, mode); } /* Similar, except check if the negation of the constant would be valid for a D-field. */ int reg_or_neg_short_operand (op, mode) register rtx op; enum machine_mode mode; { if (GET_CODE (op) == CONST_INT) return CONST_OK_FOR_LETTER_P (INTVAL (op), 'P'); return gpc_reg_operand (op, mode); } /* Return 1 if the operand is either a register or an integer whose high-order 16 bits are zero. */ int reg_or_u_short_operand (op, mode) register rtx op; enum machine_mode mode; { return u_short_cint_operand (op, mode) || gpc_reg_operand (op, mode); } /* Return 1 is the operand is either a non-special register or ANY constant integer. */ int reg_or_cint_operand (op, mode) register rtx op; enum machine_mode mode; { return (GET_CODE (op) == CONST_INT || GET_CODE (op) == CONSTANT_P_RTX || gpc_reg_operand (op, mode)); } /* Return 1 if the operand is an operand that can be loaded via the GOT */ int got_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return (GET_CODE (op) == SYMBOL_REF || GET_CODE (op) == CONST || GET_CODE (op) == LABEL_REF); } /* Return 1 if the operand is a simple references that can be loaded via the GOT (labels involving addition aren't allowed). */ int got_no_const_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return (GET_CODE (op) == SYMBOL_REF || GET_CODE (op) == LABEL_REF); } /* Return the number of instructions it takes to form a constant in an integer register. */ static int num_insns_constant_wide (value) HOST_WIDE_INT value; { /* signed constant loadable with {cal|addi} */ if (((unsigned HOST_WIDE_INT)value + 0x8000) < 0x10000) return 1; #if HOST_BITS_PER_WIDE_INT == 32 /* constant loadable with {cau|addis} */ else if ((value & 0xffff) == 0) return 1; #else /* constant loadable with {cau|addis} */ else if ((value & 0xffff) == 0 && (value & ~0xffffffff) == 0) return 1; else if (TARGET_64BIT) { HOST_WIDE_INT low = value & 0xffffffff; HOST_WIDE_INT high = value >> 32; if (high == 0 && (low & 0x80000000) == 0) return 2; else if (high == 0xffffffff && (low & 0x80000000) != 0) return 2; else if (!low) return num_insns_constant_wide (high) + 1; else return (num_insns_constant_wide (high) + num_insns_constant_wide (low) + 1); } #endif else return 2; } int num_insns_constant (op, mode) rtx op; enum machine_mode mode; { if (GET_CODE (op) == CONST_INT) return num_insns_constant_wide (INTVAL (op)); else if (GET_CODE (op) == CONST_DOUBLE && mode == SFmode) { long l; REAL_VALUE_TYPE rv; REAL_VALUE_FROM_CONST_DOUBLE (rv, op); REAL_VALUE_TO_TARGET_SINGLE (rv, l); return num_insns_constant_wide ((HOST_WIDE_INT)l); } else if (GET_CODE (op) == CONST_DOUBLE) { HOST_WIDE_INT low; HOST_WIDE_INT high; long l[2]; REAL_VALUE_TYPE rv; int endian = (WORDS_BIG_ENDIAN == 0); if (mode == VOIDmode || mode == DImode) { high = CONST_DOUBLE_HIGH (op); low = CONST_DOUBLE_LOW (op); } else { REAL_VALUE_FROM_CONST_DOUBLE (rv, op); REAL_VALUE_TO_TARGET_DOUBLE (rv, l); high = l[endian]; low = l[1 - endian]; } if (TARGET_32BIT) return (num_insns_constant_wide (low) + num_insns_constant_wide (high)); else { if (high == 0 && (low & 0x80000000) == 0) return num_insns_constant_wide (low); else if (((high & 0xffffffff) == 0xffffffff) && ((low & 0x80000000) != 0)) return num_insns_constant_wide (low); else if (mask64_operand (op, mode)) return 2; else if (low == 0) return num_insns_constant_wide (high) + 1; else return (num_insns_constant_wide (high) + num_insns_constant_wide (low) + 1); } } else abort (); } /* Return 1 if the operand is a CONST_DOUBLE and it can be put into a register with one instruction per word. We only do this if we can safely read CONST_DOUBLE_{LOW,HIGH}. */ int easy_fp_constant (op, mode) register rtx op; register enum machine_mode mode; { if (GET_CODE (op) != CONST_DOUBLE || GET_MODE (op) != mode || (GET_MODE_CLASS (mode) != MODE_FLOAT && mode != DImode)) return 0; /* Consider all constants with -msoft-float to be easy */ if (TARGET_SOFT_FLOAT && mode != DImode) return 1; /* If we are using V.4 style PIC, consider all constants to be hard */ if (flag_pic && (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS)) return 0; #ifdef TARGET_RELOCATABLE /* Similarly if we are using -mrelocatable, consider all constants to be hard */ if (TARGET_RELOCATABLE) return 0; #endif if (mode == DFmode) { long k[2]; REAL_VALUE_TYPE rv; REAL_VALUE_FROM_CONST_DOUBLE (rv, op); REAL_VALUE_TO_TARGET_DOUBLE (rv, k); return (num_insns_constant_wide ((HOST_WIDE_INT)k[0]) == 1 && num_insns_constant_wide ((HOST_WIDE_INT)k[1]) == 1); } else if (mode == SFmode) { long l; REAL_VALUE_TYPE rv; REAL_VALUE_FROM_CONST_DOUBLE (rv, op); REAL_VALUE_TO_TARGET_SINGLE (rv, l); return num_insns_constant_wide (l) == 1; } else if (mode == DImode) return ((TARGET_64BIT && GET_CODE (op) == CONST_DOUBLE && CONST_DOUBLE_LOW (op) == 0) || (num_insns_constant (op, DImode) <= 2)); else abort (); } /* Return 1 if the operand is in volatile memory. Note that during the RTL generation phase, memory_operand does not return TRUE for volatile memory references. So this function allows us to recognize volatile references where its safe. */ int volatile_mem_operand (op, mode) register rtx op; enum machine_mode mode; { if (GET_CODE (op) != MEM) return 0; if (!MEM_VOLATILE_P (op)) return 0; if (mode != GET_MODE (op)) return 0; if (reload_completed) return memory_operand (op, mode); if (reload_in_progress) return strict_memory_address_p (mode, XEXP (op, 0)); return memory_address_p (mode, XEXP (op, 0)); } /* Return 1 if the operand is an offsettable memory address. */ int offsettable_addr_operand (op, mode) register rtx op; enum machine_mode mode; { return offsettable_address_p (reload_completed | reload_in_progress, mode, op); } /* Return 1 if the operand is either an easy FP constant (see above) or memory. */ int mem_or_easy_const_operand (op, mode) register rtx op; enum machine_mode mode; { return memory_operand (op, mode) || easy_fp_constant (op, mode); } /* Return 1 if the operand is either a non-special register or an item that can be used as the operand of an SI add insn. */ int add_operand (op, mode) register rtx op; enum machine_mode mode; { return (reg_or_short_operand (op, mode) || (GET_CODE (op) == CONST_INT && (INTVAL (op) & 0xffff) == 0)); } /* Return 1 if OP is a constant but not a valid add_operand. */ int non_add_cint_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return (GET_CODE (op) == CONST_INT && (unsigned HOST_WIDE_INT) (INTVAL (op) + 0x8000) >= 0x10000 && (INTVAL (op) & 0xffff) != 0); } /* Return 1 if the operand is a non-special register or a constant that can be used as the operand of an OR or XOR insn on the RS/6000. */ int logical_operand (op, mode) register rtx op; enum machine_mode mode; { return (gpc_reg_operand (op, mode) || (GET_CODE (op) == CONST_INT && ((INTVAL (op) & (~ (HOST_WIDE_INT) 0xffff)) == 0 || (INTVAL (op) & 0xffff) == 0)) || GET_CODE (op) == CONSTANT_P_RTX); } /* Return 1 if C is a constant that is not a logical operand (as above). */ int non_logical_cint_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return (GET_CODE (op) == CONST_INT && (INTVAL (op) & (~ (HOST_WIDE_INT) 0xffff)) != 0 && (INTVAL (op) & 0xffff) != 0); } /* Return 1 if C is a constant that can be encoded in a mask on the RS/6000. It is if there are no more than two 1->0 or 0->1 transitions. Reject all ones and all zeros, since these should have been optimized away and confuse the making of MB and ME. */ int mask_constant (c) register HOST_WIDE_INT c; { int i; int last_bit_value; int transitions = 0; if (c == 0 || c == ~0) return 0; last_bit_value = c & 1; for (i = 1; i < 32; i++) if (((c >>= 1) & 1) != last_bit_value) last_bit_value ^= 1, transitions++; return transitions <= 2; } /* Return 1 if the operand is a constant that is a mask on the RS/6000. */ int mask_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return GET_CODE (op) == CONST_INT && mask_constant (INTVAL (op)); } /* Return 1 if the operand is a constant that is a PowerPC64 mask. It is if there are no more than one 1->0 or 0->1 transitions. Reject all ones and all zeros, since these should have been optimized away and confuse the making of MB and ME. */ int mask64_operand (op, mode) register rtx op; enum machine_mode mode; { if (GET_CODE (op) == CONST_INT) { HOST_WIDE_INT c = INTVAL (op); int i; int last_bit_value; int transitions = 0; if (c == 0 || c == ~0) return 0; last_bit_value = c & 1; for (i = 1; i < HOST_BITS_PER_WIDE_INT; i++) if (((c >>= 1) & 1) != last_bit_value) last_bit_value ^= 1, transitions++; #if HOST_BITS_PER_WIDE_INT == 32 /* Consider CONST_INT sign-extended. */ transitions += (last_bit_value != 1); #endif return transitions <= 1; } else if (GET_CODE (op) == CONST_DOUBLE && (mode == VOIDmode || mode == DImode)) { HOST_WIDE_INT low = CONST_DOUBLE_LOW (op); #if HOST_BITS_PER_WIDE_INT == 32 HOST_WIDE_INT high = CONST_DOUBLE_HIGH (op); #endif int i; int last_bit_value; int transitions = 0; if ((low == 0 #if HOST_BITS_PER_WIDE_INT == 32 && high == 0 #endif ) || (low == ~0 #if HOST_BITS_PER_WIDE_INT == 32 && high == ~0 #endif )) return 0; last_bit_value = low & 1; for (i = 1; i < HOST_BITS_PER_WIDE_INT; i++) if (((low >>= 1) & 1) != last_bit_value) last_bit_value ^= 1, transitions++; #if HOST_BITS_PER_WIDE_INT == 32 if ((high & 1) != last_bit_value) last_bit_value ^= 1, transitions++; for (i = 1; i < HOST_BITS_PER_WIDE_INT; i++) if (((high >>= 1) & 1) != last_bit_value) last_bit_value ^= 1, transitions++; #endif return transitions <= 1; } else return 0; } /* Return 1 if the operand is either a non-special register or a constant that can be used as the operand of a PowerPC64 logical AND insn. */ int and64_operand (op, mode) register rtx op; enum machine_mode mode; { return (logical_operand (op, mode) || mask64_operand (op, mode)); } /* Return 1 if the operand is either a non-special register or a constant that can be used as the operand of an RS/6000 logical AND insn. */ int and_operand (op, mode) register rtx op; enum machine_mode mode; { return (logical_operand (op, mode) || mask_operand (op, mode)); } /* Return 1 if the operand is a general register or memory operand. */ int reg_or_mem_operand (op, mode) register rtx op; register enum machine_mode mode; { return (gpc_reg_operand (op, mode) || memory_operand (op, mode) || volatile_mem_operand (op, mode)); } /* Return 1 if the operand is a general register or memory operand without pre-inc or pre_dec which produces invalid form of PowerPC lwa instruction. */ int lwa_operand (op, mode) register rtx op; register enum machine_mode mode; { rtx inner = op; if (reload_completed && GET_CODE (inner) == SUBREG) inner = SUBREG_REG (inner); return gpc_reg_operand (inner, mode) || (memory_operand (inner, mode) && GET_CODE (XEXP (inner, 0)) != PRE_INC && GET_CODE (XEXP (inner, 0)) != PRE_DEC); } /* Return 1 if the operand, used inside a MEM, is a valid first argument to CALL. This is a SYMBOL_REF or a pseudo-register, which will be forced to lr. */ int call_operand (op, mode) register rtx op; enum machine_mode mode; { if (mode != VOIDmode && GET_MODE (op) != mode) return 0; return (GET_CODE (op) == SYMBOL_REF || (GET_CODE (op) == REG && REGNO (op) >= FIRST_PSEUDO_REGISTER)); } /* Return 1 if the operand is a SYMBOL_REF for a function known to be in this file. */ int current_file_function_operand (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { return (GET_CODE (op) == SYMBOL_REF && (SYMBOL_REF_FLAG (op) || op == XEXP (DECL_RTL (current_function_decl), 0))); } /* Return 1 if this operand is a valid input for a move insn. */ int input_operand (op, mode) register rtx op; enum machine_mode mode; { /* Memory is always valid. */ if (memory_operand (op, mode)) return 1; /* For floating-point, easy constants are valid. */ if (GET_MODE_CLASS (mode) == MODE_FLOAT && CONSTANT_P (op) && easy_fp_constant (op, mode)) return 1; /* Allow any integer constant. */ if (GET_MODE_CLASS (mode) == MODE_INT && (GET_CODE (op) == CONST_INT || GET_CODE (op) == CONSTANT_P_RTX || GET_CODE (op) == CONST_DOUBLE)) return 1; /* For floating-point or multi-word mode, the only remaining valid type is a register. */ if (GET_MODE_CLASS (mode) == MODE_FLOAT || GET_MODE_SIZE (mode) > UNITS_PER_WORD) return register_operand (op, mode); /* The only cases left are integral modes one word or smaller (we do not get called for MODE_CC values). These can be in any register. */ if (register_operand (op, mode)) return 1; /* A SYMBOL_REF referring to the TOC is valid. */ if (LEGITIMATE_CONSTANT_POOL_ADDRESS_P (op)) return 1; /* Windows NT allows SYMBOL_REFs and LABEL_REFs against the TOC directly in the instruction stream */ if (DEFAULT_ABI == ABI_NT && (GET_CODE (op) == SYMBOL_REF || GET_CODE (op) == LABEL_REF)) return 1; /* V.4 allows SYMBOL_REFs and CONSTs that are in the small data region to be valid. */ if ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) && (GET_CODE (op) == SYMBOL_REF || GET_CODE (op) == CONST) && small_data_operand (op, Pmode)) return 1; return 0; } /* Return 1 for an operand in small memory on V.4/eabi */ int small_data_operand (op, mode) #if TARGET_ELF rtx op; enum machine_mode mode; #else rtx op ATTRIBUTE_UNUSED; enum machine_mode mode ATTRIBUTE_UNUSED; #endif { #if TARGET_ELF rtx sym_ref, const_part; if (rs6000_sdata == SDATA_NONE || rs6000_sdata == SDATA_DATA) return 0; if (DEFAULT_ABI != ABI_V4 && DEFAULT_ABI != ABI_SOLARIS) return 0; if (GET_CODE (op) == SYMBOL_REF) sym_ref = op; else if (GET_CODE (op) != CONST || GET_CODE (XEXP (op, 0)) != PLUS || GET_CODE (XEXP (XEXP (op, 0), 0)) != SYMBOL_REF || GET_CODE (XEXP (XEXP (op, 0), 1)) != CONST_INT) return 0; else { rtx sum = XEXP (op, 0); HOST_WIDE_INT summand; /* We have to be careful here, because it is the referenced address that must be 32k from _SDA_BASE_, not just the symbol. */ summand = INTVAL (XEXP (sum, 1)); if (summand < 0 || summand > g_switch_value) return 0; sym_ref = XEXP (sum, 0); } if (*XSTR (sym_ref, 0) != '@') return 0; return 1; #else return 0; #endif } /* Initialize a variable CUM of type CUMULATIVE_ARGS for a call to a function whose data type is FNTYPE. For a library call, FNTYPE is 0. For incoming args we set the number of arguments in the prototype large so we never return a PARALLEL. */ void init_cumulative_args (cum, fntype, libname, incoming) CUMULATIVE_ARGS *cum; tree fntype; rtx libname ATTRIBUTE_UNUSED; int incoming; { static CUMULATIVE_ARGS zero_cumulative; enum rs6000_abi abi = DEFAULT_ABI; *cum = zero_cumulative; cum->words = 0; cum->fregno = FP_ARG_MIN_REG; cum->prototype = (fntype && TYPE_ARG_TYPES (fntype)); cum->call_cookie = CALL_NORMAL; if (incoming) { cum->nargs_prototype = 1000; /* don't return a PARALLEL */ if (abi == ABI_V4 || abi == ABI_SOLARIS) cum->varargs_offset = RS6000_VARARGS_OFFSET; } else if (cum->prototype) cum->nargs_prototype = (list_length (TYPE_ARG_TYPES (fntype)) - 1 + (TYPE_MODE (TREE_TYPE (fntype)) == BLKmode || RETURN_IN_MEMORY (TREE_TYPE (fntype)))); else cum->nargs_prototype = 0; cum->orig_nargs = cum->nargs_prototype; /* Check for DLL import functions */ if (abi == ABI_NT && fntype && lookup_attribute ("dllimport", TYPE_ATTRIBUTES (fntype))) cum->call_cookie = CALL_NT_DLLIMPORT; /* Also check for longcall's */ else if (fntype && lookup_attribute ("longcall", TYPE_ATTRIBUTES (fntype))) cum->call_cookie = CALL_LONG; if (TARGET_DEBUG_ARG) { fprintf (stderr, "\ninit_cumulative_args:"); if (fntype) { tree ret_type = TREE_TYPE (fntype); fprintf (stderr, " ret code = %s,", tree_code_name[ (int)TREE_CODE (ret_type) ]); } if ((abi == ABI_V4 || abi == ABI_SOLARIS) && incoming) fprintf (stderr, " varargs = %d, ", cum->varargs_offset); if (cum->call_cookie & CALL_NT_DLLIMPORT) fprintf (stderr, " dllimport,"); if (cum->call_cookie & CALL_LONG) fprintf (stderr, " longcall,"); fprintf (stderr, " proto = %d, nargs = %d\n", cum->prototype, cum->nargs_prototype); } } /* If defined, a C expression which determines whether, and in which direction, to pad out an argument with extra space. The value should be of type `enum direction': either `upward' to pad above the argument, `downward' to pad below, or `none' to inhibit padding. For the AIX ABI structs are always stored left shifted in their argument slot. */ int function_arg_padding (mode, type) enum machine_mode mode; tree type; { if (type != 0 && AGGREGATE_TYPE_P (type)) return (int)upward; /* This is the default definition. */ return (! BYTES_BIG_ENDIAN ? (int)upward : ((mode == BLKmode ? (type && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST && int_size_in_bytes (type) < (PARM_BOUNDARY / BITS_PER_UNIT)) : GET_MODE_BITSIZE (mode) < PARM_BOUNDARY) ? (int)downward : (int)upward)); } /* If defined, a C expression that gives the alignment boundary, in bits, of an argument with the specified mode and type. If it is not defined, PARM_BOUNDARY is used for all arguments. Windows NT wants anything >= 8 bytes to be double word aligned. V.4 wants long longs to be double word aligned. */ int function_arg_boundary (mode, type) enum machine_mode mode; tree type; { if ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) && mode == DImode) return 64; if (DEFAULT_ABI != ABI_NT || TARGET_64BIT) return PARM_BOUNDARY; if (mode != BLKmode) return (GET_MODE_SIZE (mode)) >= 8 ? 64 : 32; return (int_size_in_bytes (type) >= 8) ? 64 : 32; } /* Update the data in CUM to advance over an argument of mode MODE and data type TYPE. (TYPE is null for libcalls where that information may not be available.) */ void function_arg_advance (cum, mode, type, named) CUMULATIVE_ARGS *cum; enum machine_mode mode; tree type; int named; { int align = (TARGET_32BIT && (cum->words & 1) != 0 && function_arg_boundary (mode, type) == 64) ? 1 : 0; cum->words += align; cum->nargs_prototype--; if (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) { /* Long longs must not be split between registers and stack */ if ((GET_MODE_CLASS (mode) != MODE_FLOAT || TARGET_SOFT_FLOAT) && type && !AGGREGATE_TYPE_P (type) && cum->words < GP_ARG_NUM_REG && cum->words + RS6000_ARG_SIZE (mode, type, named) > GP_ARG_NUM_REG) { cum->words = GP_ARG_NUM_REG; } /* Aggregates get passed as pointers */ if (type && AGGREGATE_TYPE_P (type)) cum->words++; /* Floats go in registers, & don't occupy space in the GP registers like they do for AIX unless software floating point. */ else if (GET_MODE_CLASS (mode) == MODE_FLOAT && TARGET_HARD_FLOAT && cum->fregno <= FP_ARG_V4_MAX_REG) cum->fregno++; else cum->words += RS6000_ARG_SIZE (mode, type, 1); } else if (named) { cum->words += RS6000_ARG_SIZE (mode, type, named); if (GET_MODE_CLASS (mode) == MODE_FLOAT && TARGET_HARD_FLOAT) cum->fregno++; } if (TARGET_DEBUG_ARG) fprintf (stderr, "function_adv: words = %2d, fregno = %2d, nargs = %4d, proto = %d, mode = %4s, named = %d, align = %d\n", cum->words, cum->fregno, cum->nargs_prototype, cum->prototype, GET_MODE_NAME (mode), named, align); } /* Determine where to put an argument to a function. Value is zero to push the argument on the stack, or a hard register in which to store the argument. MODE is the argument's machine mode. TYPE is the data type of the argument (as a tree). This is null for libcalls where that information may not be available. CUM is a variable of type CUMULATIVE_ARGS which gives info about the preceding args and about the function being called. NAMED is nonzero if this argument is a named parameter (otherwise it is an extra parameter matching an ellipsis). On RS/6000 the first eight words of non-FP are normally in registers and the rest are pushed. Under AIX, the first 13 FP args are in registers. Under V.4, the first 8 FP args are in registers. If this is floating-point and no prototype is specified, we use both an FP and integer register (or possibly FP reg and stack). Library functions (when TYPE is zero) always have the proper types for args, so we can pass the FP value just in one register. emit_library_function doesn't support PARALLEL anyway. */ struct rtx_def * function_arg (cum, mode, type, named) CUMULATIVE_ARGS *cum; enum machine_mode mode; tree type; int named; { int align = (TARGET_32BIT && (cum->words & 1) != 0 && function_arg_boundary (mode, type) == 64) ? 1 : 0; int align_words = cum->words + align; if (TARGET_DEBUG_ARG) fprintf (stderr, "function_arg: words = %2d, fregno = %2d, nargs = %4d, proto = %d, mode = %4s, named = %d, align = %d\n", cum->words, cum->fregno, cum->nargs_prototype, cum->prototype, GET_MODE_NAME (mode), named, align); /* Return a marker to indicate whether CR1 needs to set or clear the bit that V.4 uses to say fp args were passed in registers. Assume that we don't need the marker for software floating point, or compiler generated library calls. */ if (mode == VOIDmode) { enum rs6000_abi abi = DEFAULT_ABI; if ((abi == ABI_V4 || abi == ABI_SOLARIS) && TARGET_HARD_FLOAT && cum->nargs_prototype < 0 && type && (cum->prototype || TARGET_NO_PROTOTYPE)) { return GEN_INT (cum->call_cookie | ((cum->fregno == FP_ARG_MIN_REG) ? CALL_V4_SET_FP_ARGS : CALL_V4_CLEAR_FP_ARGS)); } return GEN_INT (cum->call_cookie); } if (!named) { if (DEFAULT_ABI != ABI_V4 && DEFAULT_ABI != ABI_SOLARIS) return NULL_RTX; } if (type && TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST) return NULL_RTX; if (USE_FP_FOR_ARG_P (*cum, mode, type)) { if (DEFAULT_ABI == ABI_V4 /* V.4 never passes FP values in GP registers */ || DEFAULT_ABI == ABI_SOLARIS || ! type || ((cum->nargs_prototype > 0) /* IBM AIX extended its linkage convention definition always to require FP args after register save area hole on the stack. */ && (DEFAULT_ABI != ABI_AIX || ! TARGET_XL_CALL || (align_words < GP_ARG_NUM_REG)))) return gen_rtx_REG (mode, cum->fregno); return gen_rtx_PARALLEL (mode, gen_rtvec (2, gen_rtx_EXPR_LIST (VOIDmode, ((align_words >= GP_ARG_NUM_REG) ? NULL_RTX : (align_words + RS6000_ARG_SIZE (mode, type, named) > GP_ARG_NUM_REG /* If this is partially on the stack, then we only include the portion actually in registers here. */ ? gen_rtx_REG (SImode, GP_ARG_MIN_REG + align_words) : gen_rtx_REG (mode, GP_ARG_MIN_REG + align_words))), const0_rtx), gen_rtx_EXPR_LIST (VOIDmode, gen_rtx_REG (mode, cum->fregno), const0_rtx))); } /* Long longs won't be split between register and stack; FP arguments get passed on the stack if they didn't get a register. */ else if ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) && (align_words + RS6000_ARG_SIZE (mode, type, named) > GP_ARG_NUM_REG || (GET_MODE_CLASS (mode) == MODE_FLOAT && TARGET_HARD_FLOAT))) { return NULL_RTX; } else if (align_words < GP_ARG_NUM_REG) return gen_rtx_REG (mode, GP_ARG_MIN_REG + align_words); return NULL_RTX; } /* For an arg passed partly in registers and partly in memory, this is the number of registers used. For args passed entirely in registers or entirely in memory, zero. */ int function_arg_partial_nregs (cum, mode, type, named) CUMULATIVE_ARGS *cum; enum machine_mode mode; tree type; int named; { if (! named) return 0; if (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) return 0; if (USE_FP_FOR_ARG_P (*cum, mode, type)) { if (cum->nargs_prototype >= 0) return 0; } if (cum->words < GP_ARG_NUM_REG && GP_ARG_NUM_REG < (cum->words + RS6000_ARG_SIZE (mode, type, named))) { int ret = GP_ARG_NUM_REG - cum->words; if (ret && TARGET_DEBUG_ARG) fprintf (stderr, "function_arg_partial_nregs: %d\n", ret); return ret; } return 0; } /* A C expression that indicates when an argument must be passed by reference. If nonzero for an argument, a copy of that argument is made in memory and a pointer to the argument is passed instead of the argument itself. The pointer is passed in whatever way is appropriate for passing a pointer to that type. Under V.4, structures and unions are passed by reference. */ int function_arg_pass_by_reference (cum, mode, type, named) CUMULATIVE_ARGS *cum ATTRIBUTE_UNUSED; enum machine_mode mode ATTRIBUTE_UNUSED; tree type; int named ATTRIBUTE_UNUSED; { if ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) && type && AGGREGATE_TYPE_P (type)) { if (TARGET_DEBUG_ARG) fprintf (stderr, "function_arg_pass_by_reference: aggregate\n"); return 1; } return 0; } /* Perform any needed actions needed for a function that is receiving a variable number of arguments. CUM is as above. MODE and TYPE are the mode and type of the current parameter. PRETEND_SIZE is a variable that should be set to the amount of stack that must be pushed by the prolog to pretend that our caller pushed it. Normally, this macro will push all remaining incoming registers on the stack and set PRETEND_SIZE to the length of the registers pushed. */ void setup_incoming_varargs (cum, mode, type, pretend_size, no_rtl) CUMULATIVE_ARGS *cum; enum machine_mode mode; tree type; int *pretend_size; int no_rtl; { rtx save_area = virtual_incoming_args_rtx; int reg_size = TARGET_32BIT ? 4 : 8; if (TARGET_DEBUG_ARG) fprintf (stderr, "setup_vararg: words = %2d, fregno = %2d, nargs = %4d, proto = %d, mode = %4s, no_rtl= %d\n", cum->words, cum->fregno, cum->nargs_prototype, cum->prototype, GET_MODE_NAME (mode), no_rtl); if (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) { rs6000_sysv_varargs_p = 1; if (! no_rtl) save_area = plus_constant (frame_pointer_rtx, RS6000_VARARGS_OFFSET); } else rs6000_sysv_varargs_p = 0; if (cum->words < 8) { int first_reg_offset = cum->words; if (MUST_PASS_IN_STACK (mode, type)) first_reg_offset += RS6000_ARG_SIZE (TYPE_MODE (type), type, 1); if (first_reg_offset > GP_ARG_NUM_REG) first_reg_offset = GP_ARG_NUM_REG; if (!no_rtl && first_reg_offset != GP_ARG_NUM_REG) move_block_from_reg (GP_ARG_MIN_REG + first_reg_offset, gen_rtx_MEM (BLKmode, plus_constant (save_area, first_reg_offset * reg_size)), GP_ARG_NUM_REG - first_reg_offset, (GP_ARG_NUM_REG - first_reg_offset) * UNITS_PER_WORD); *pretend_size = (GP_ARG_NUM_REG - first_reg_offset) * UNITS_PER_WORD; } /* Save FP registers if needed. */ if ((DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) && TARGET_HARD_FLOAT && !no_rtl) { int fregno = cum->fregno; int num_fp_reg = FP_ARG_V4_MAX_REG + 1 - fregno; if (num_fp_reg >= 0) { rtx cr1 = gen_rtx_REG (CCmode, 69); rtx lab = gen_label_rtx (); int off = (GP_ARG_NUM_REG * reg_size) + ((fregno - FP_ARG_MIN_REG) * 8); emit_jump_insn (gen_rtx_SET (VOIDmode, pc_rtx, gen_rtx_IF_THEN_ELSE (VOIDmode, gen_rtx_NE (VOIDmode, cr1, const0_rtx), gen_rtx_LABEL_REF (VOIDmode, lab), pc_rtx))); while ( num_fp_reg-- >= 0) { emit_move_insn (gen_rtx_MEM (DFmode, plus_constant (save_area, off)), gen_rtx_REG (DFmode, fregno++)); off += 8; } emit_label (lab); } } } /* If defined, is a C expression that produces the machine-specific code for a call to `__builtin_saveregs'. This code will be moved to the very beginning of the function, before any parameter access are made. The return value of this function should be an RTX that contains the value to use as the return of `__builtin_saveregs'. The argument ARGS is a `tree_list' containing the arguments that were passed to `__builtin_saveregs'. If this macro is not defined, the compiler will output an ordinary call to the library function `__builtin_saveregs'. On the Power/PowerPC return the address of the area on the stack used to hold arguments. Under AIX, this includes the 8 word register save area. Under V.4 this does not. */ struct rtx_def * expand_builtin_saveregs (args) tree args ATTRIBUTE_UNUSED; { return virtual_incoming_args_rtx; } /* Generate a memory reference for expand_block_move, copying volatile, and other bits from an original memory reference. */ static rtx expand_block_move_mem (mode, addr, orig_mem) enum machine_mode mode; rtx addr; rtx orig_mem; { rtx mem = gen_rtx_MEM (mode, addr); RTX_UNCHANGING_P (mem) = RTX_UNCHANGING_P (orig_mem); MEM_VOLATILE_P (mem) = MEM_VOLATILE_P (orig_mem); MEM_IN_STRUCT_P (mem) = MEM_IN_STRUCT_P (orig_mem); #ifdef MEM_UNALIGNED_P MEM_UNALIGNED_P (mem) = MEM_UNALIGNED_P (orig_mem); #endif return mem; } /* Expand a block move operation, and return 1 if successful. Return 0 if we should let the compiler generate normal code. operands[0] is the destination operands[1] is the source operands[2] is the length operands[3] is the alignment */ #define MAX_MOVE_REG 4 int expand_block_move (operands) rtx operands[]; { rtx orig_dest = operands[0]; rtx orig_src = operands[1]; rtx bytes_rtx = operands[2]; rtx align_rtx = operands[3]; int constp = (GET_CODE (bytes_rtx) == CONST_INT); int align = XINT (align_rtx, 0); int bytes; int offset; int num_reg; int i; rtx src_reg; rtx dest_reg; rtx src_addr; rtx dest_addr; rtx tmp_reg; rtx stores[MAX_MOVE_REG]; int move_bytes; /* If this is not a fixed size move, just call memcpy */ if (!constp) return 0; /* Anything to move? */ bytes = INTVAL (bytes_rtx); if (bytes <= 0) return 1; /* Don't support real large moves. If string instructions are not used, then don't generate more than 8 loads. */ if (TARGET_STRING) { if (bytes > 4*8) return 0; } else if (!STRICT_ALIGNMENT) { if (bytes > 4*8) return 0; } else if (bytes > 8*align) return 0; /* Move the address into scratch registers. */ dest_reg = copy_addr_to_reg (XEXP (orig_dest, 0)); src_reg = copy_addr_to_reg (XEXP (orig_src, 0)); if (TARGET_STRING) /* string instructions are available */ { for ( ; bytes > 0; bytes -= move_bytes) { if (bytes > 24 /* move up to 32 bytes at a time */ && !fixed_regs[5] && !fixed_regs[6] && !fixed_regs[7] && !fixed_regs[8] && !fixed_regs[9] && !fixed_regs[10] && !fixed_regs[11] && !fixed_regs[12]) { move_bytes = (bytes > 32) ? 32 : bytes; emit_insn (gen_movstrsi_8reg (expand_block_move_mem (BLKmode, dest_reg, orig_dest), expand_block_move_mem (BLKmode, src_reg, orig_src), GEN_INT ((move_bytes == 32) ? 0 : move_bytes), align_rtx)); } else if (bytes > 16 /* move up to 24 bytes at a time */ && !fixed_regs[7] && !fixed_regs[8] && !fixed_regs[9] && !fixed_regs[10] && !fixed_regs[11] && !fixed_regs[12]) { move_bytes = (bytes > 24) ? 24 : bytes; emit_insn (gen_movstrsi_6reg (expand_block_move_mem (BLKmode, dest_reg, orig_dest), expand_block_move_mem (BLKmode, src_reg, orig_src), GEN_INT (move_bytes), align_rtx)); } else if (bytes > 8 /* move up to 16 bytes at a time */ && !fixed_regs[9] && !fixed_regs[10] && !fixed_regs[11] && !fixed_regs[12]) { move_bytes = (bytes > 16) ? 16 : bytes; emit_insn (gen_movstrsi_4reg (expand_block_move_mem (BLKmode, dest_reg, orig_dest), expand_block_move_mem (BLKmode, src_reg, orig_src), GEN_INT (move_bytes), align_rtx)); } else if (bytes > 4 && !TARGET_64BIT) { /* move up to 8 bytes at a time */ move_bytes = (bytes > 8) ? 8 : bytes; emit_insn (gen_movstrsi_2reg (expand_block_move_mem (BLKmode, dest_reg, orig_dest), expand_block_move_mem (BLKmode, src_reg, orig_src), GEN_INT (move_bytes), align_rtx)); } else if (bytes >= 4 && (align >= 4 || !STRICT_ALIGNMENT)) { /* move 4 bytes */ move_bytes = 4; tmp_reg = gen_reg_rtx (SImode); emit_move_insn (tmp_reg, expand_block_move_mem (SImode, src_reg, orig_src)); emit_move_insn (expand_block_move_mem (SImode, dest_reg, orig_dest), tmp_reg); } else if (bytes == 2 && (align >= 2 || !STRICT_ALIGNMENT)) { /* move 2 bytes */ move_bytes = 2; tmp_reg = gen_reg_rtx (HImode); emit_move_insn (tmp_reg, expand_block_move_mem (HImode, src_reg, orig_src)); emit_move_insn (expand_block_move_mem (HImode, dest_reg, orig_dest), tmp_reg); } else if (bytes == 1) /* move 1 byte */ { move_bytes = 1; tmp_reg = gen_reg_rtx (QImode); emit_move_insn (tmp_reg, expand_block_move_mem (QImode, src_reg, orig_src)); emit_move_insn (expand_block_move_mem (QImode, dest_reg, orig_dest), tmp_reg); } else { /* move up to 4 bytes at a time */ move_bytes = (bytes > 4) ? 4 : bytes; emit_insn (gen_movstrsi_1reg (expand_block_move_mem (BLKmode, dest_reg, orig_dest), expand_block_move_mem (BLKmode, src_reg, orig_src), GEN_INT (move_bytes), align_rtx)); } if (bytes > move_bytes) { emit_insn (gen_addsi3 (src_reg, src_reg, GEN_INT (move_bytes))); emit_insn (gen_addsi3 (dest_reg, dest_reg, GEN_INT (move_bytes))); } } } else /* string instructions not available */ { num_reg = offset = 0; for ( ; bytes > 0; (bytes -= move_bytes), (offset += move_bytes)) { /* Calculate the correct offset for src/dest */ if (offset == 0) { src_addr = src_reg; dest_addr = dest_reg; } else { src_addr = gen_rtx_PLUS (Pmode, src_reg, GEN_INT (offset)); dest_addr = gen_rtx_PLUS (Pmode, dest_reg, GEN_INT (offset)); } /* Generate the appropriate load and store, saving the stores for later */ if (bytes >= 8 && TARGET_64BIT && (align >= 8 || !STRICT_ALIGNMENT)) { move_bytes = 8; tmp_reg = gen_reg_rtx (DImode); emit_insn (gen_movdi (tmp_reg, expand_block_move_mem (DImode, src_addr, orig_src))); stores[ num_reg++ ] = gen_movdi (expand_block_move_mem (DImode, dest_addr, orig_dest), tmp_reg); } else if (bytes >= 4 && (align >= 4 || !STRICT_ALIGNMENT)) { move_bytes = 4; tmp_reg = gen_reg_rtx (SImode); emit_insn (gen_movsi (tmp_reg, expand_block_move_mem (SImode, src_addr, orig_src))); stores[ num_reg++ ] = gen_movsi (expand_block_move_mem (SImode, dest_addr, orig_dest), tmp_reg); } else if (bytes >= 2 && (align >= 2 || !STRICT_ALIGNMENT)) { move_bytes = 2; tmp_reg = gen_reg_rtx (HImode); emit_insn (gen_movsi (tmp_reg, expand_block_move_mem (HImode, src_addr, orig_src))); stores[ num_reg++ ] = gen_movhi (expand_block_move_mem (HImode, dest_addr, orig_dest), tmp_reg); } else { move_bytes = 1; tmp_reg = gen_reg_rtx (QImode); emit_insn (gen_movsi (tmp_reg, expand_block_move_mem (QImode, src_addr, orig_src))); stores[ num_reg++ ] = gen_movqi (expand_block_move_mem (QImode, dest_addr, orig_dest), tmp_reg); } if (num_reg >= MAX_MOVE_REG) { for (i = 0; i < num_reg; i++) emit_insn (stores[i]); num_reg = 0; } } for (i = 0; i < num_reg; i++) emit_insn (stores[i]); } return 1; } /* Return 1 if OP is a load multiple operation. It is known to be a PARALLEL and the first section will be tested. */ int load_multiple_operation (op, mode) rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { int count = XVECLEN (op, 0); int dest_regno; rtx src_addr; int i; /* Perform a quick check so we don't blow up below. */ if (count <= 1 || GET_CODE (XVECEXP (op, 0, 0)) != SET || GET_CODE (SET_DEST (XVECEXP (op, 0, 0))) != REG || GET_CODE (SET_SRC (XVECEXP (op, 0, 0))) != MEM) return 0; dest_regno = REGNO (SET_DEST (XVECEXP (op, 0, 0))); src_addr = XEXP (SET_SRC (XVECEXP (op, 0, 0)), 0); for (i = 1; i < count; i++) { rtx elt = XVECEXP (op, 0, i); if (GET_CODE (elt) != SET || GET_CODE (SET_DEST (elt)) != REG || GET_MODE (SET_DEST (elt)) != SImode || REGNO (SET_DEST (elt)) != dest_regno + i || GET_CODE (SET_SRC (elt)) != MEM || GET_MODE (SET_SRC (elt)) != SImode || GET_CODE (XEXP (SET_SRC (elt), 0)) != PLUS || ! rtx_equal_p (XEXP (XEXP (SET_SRC (elt), 0), 0), src_addr) || GET_CODE (XEXP (XEXP (SET_SRC (elt), 0), 1)) != CONST_INT || INTVAL (XEXP (XEXP (SET_SRC (elt), 0), 1)) != i * 4) return 0; } return 1; } /* Similar, but tests for store multiple. Here, the second vector element is a CLOBBER. It will be tested later. */ int store_multiple_operation (op, mode) rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { int count = XVECLEN (op, 0) - 1; int src_regno; rtx dest_addr; int i; /* Perform a quick check so we don't blow up below. */ if (count <= 1 || GET_CODE (XVECEXP (op, 0, 0)) != SET || GET_CODE (SET_DEST (XVECEXP (op, 0, 0))) != MEM || GET_CODE (SET_SRC (XVECEXP (op, 0, 0))) != REG) return 0; src_regno = REGNO (SET_SRC (XVECEXP (op, 0, 0))); dest_addr = XEXP (SET_DEST (XVECEXP (op, 0, 0)), 0); for (i = 1; i < count; i++) { rtx elt = XVECEXP (op, 0, i + 1); if (GET_CODE (elt) != SET || GET_CODE (SET_SRC (elt)) != REG || GET_MODE (SET_SRC (elt)) != SImode || REGNO (SET_SRC (elt)) != src_regno + i || GET_CODE (SET_DEST (elt)) != MEM || GET_MODE (SET_DEST (elt)) != SImode || GET_CODE (XEXP (SET_DEST (elt), 0)) != PLUS || ! rtx_equal_p (XEXP (XEXP (SET_DEST (elt), 0), 0), dest_addr) || GET_CODE (XEXP (XEXP (SET_DEST (elt), 0), 1)) != CONST_INT || INTVAL (XEXP (XEXP (SET_DEST (elt), 0), 1)) != i * 4) return 0; } return 1; } /* Return 1 if OP is a comparison operation that is valid for a branch insn. We only check the opcode against the mode of the CC value here. */ int branch_comparison_operator (op, mode) register rtx op; enum machine_mode mode ATTRIBUTE_UNUSED; { enum rtx_code code = GET_CODE (op); enum machine_mode cc_mode; if (GET_RTX_CLASS (code) != '<') return 0; cc_mode = GET_MODE (XEXP (op, 0)); if (GET_MODE_CLASS (cc_mode) != MODE_CC) return 0; if ((code == GT || code == LT || code == GE || code == LE) && cc_mode == CCUNSmode) return 0; if ((code == GTU || code == LTU || code == GEU || code == LEU) && (cc_mode != CCUNSmode)) return 0; return 1; } /* Return 1 if OP is a comparison operation that is valid for an scc insn. We check the opcode against the mode of the CC value and disallow EQ or NE comparisons for integers. */ int scc_comparison_operator (op, mode) register rtx op; enum machine_mode mode; { enum rtx_code code = GET_CODE (op); enum machine_mode cc_mode; if (GET_MODE (op) != mode && mode != VOIDmode) return 0; if (GET_RTX_CLASS (code) != '<') return 0; cc_mode = GET_MODE (XEXP (op, 0)); if (GET_MODE_CLASS (cc_mode) != MODE_CC) return 0; if (code == NE && cc_mode != CCFPmode) return 0; if ((code == GT || code == LT || code == GE || code == LE) && cc_mode == CCUNSmode) return 0; if ((code == GTU || code == LTU || code == GEU || code == LEU) && (cc_mode != CCUNSmode)) return 0; if (cc_mode == CCEQmode && code != EQ && code != NE) return 0; return 1; } int trap_comparison_operator (op, mode) rtx op; enum machine_mode mode; { if (mode != VOIDmode && mode != GET_MODE (op)) return 0; return (GET_RTX_CLASS (GET_CODE (op)) == '<' || GET_CODE (op) == EQ || GET_CODE (op) == NE); } /* Return 1 if ANDOP is a mask that has no bits on that are not in the mask required to convert the result of a rotate insn into a shift left insn of SHIFTOP bits. Both are known to be CONST_INT. */ int includes_lshift_p (shiftop, andop) register rtx shiftop; register rtx andop; { int shift_mask = (~0 << INTVAL (shiftop)); return (INTVAL (andop) & ~shift_mask) == 0; } /* Similar, but for right shift. */ int includes_rshift_p (shiftop, andop) register rtx shiftop; register rtx andop; { unsigned HOST_WIDE_INT shift_mask = ~(unsigned HOST_WIDE_INT) 0; shift_mask >>= INTVAL (shiftop); return (INTVAL (andop) & ~ shift_mask) == 0; } /* Return 1 if REGNO (reg1) == REGNO (reg2) - 1 making them candidates for lfq and stfq insns. Note reg1 and reg2 *must* be hard registers. To be sure we will abort if we are passed pseudo registers. */ int registers_ok_for_quad_peep (reg1, reg2) rtx reg1, reg2; { /* We might have been passed a SUBREG. */ if (GET_CODE (reg1) != REG || GET_CODE (reg2) != REG) return 0; return (REGNO (reg1) == REGNO (reg2) - 1); } /* Return 1 if addr1 and addr2 are suitable for lfq or stfq insn. addr1 and addr2 must be in consecutive memory locations (addr2 == addr1 + 8). */ int addrs_ok_for_quad_peep (addr1, addr2) register rtx addr1; register rtx addr2; { int reg1; int offset1; /* Extract an offset (if used) from the first addr. */ if (GET_CODE (addr1) == PLUS) { /* If not a REG, return zero. */ if (GET_CODE (XEXP (addr1, 0)) != REG) return 0; else { reg1 = REGNO (XEXP (addr1, 0)); /* The offset must be constant! */ if (GET_CODE (XEXP (addr1, 1)) != CONST_INT) return 0; offset1 = INTVAL (XEXP (addr1, 1)); } } else if (GET_CODE (addr1) != REG) return 0; else { reg1 = REGNO (addr1); /* This was a simple (mem (reg)) expression. Offset is 0. */ offset1 = 0; } /* Make sure the second address is a (mem (plus (reg) (const_int). */ if (GET_CODE (addr2) != PLUS) return 0; if (GET_CODE (XEXP (addr2, 0)) != REG || GET_CODE (XEXP (addr2, 1)) != CONST_INT) return 0; if (reg1 != REGNO (XEXP (addr2, 0))) return 0; /* The offset for the second addr must be 8 more than the first addr. */ if (INTVAL (XEXP (addr2, 1)) != offset1 + 8) return 0; /* All the tests passed. addr1 and addr2 are valid for lfq or stfq instructions. */ return 1; } /* Return the register class of a scratch register needed to copy IN into or out of a register in CLASS in MODE. If it can be done directly, NO_REGS is returned. */ enum reg_class secondary_reload_class (class, mode, in) enum reg_class class; enum machine_mode mode ATTRIBUTE_UNUSED; rtx in; { int regno; /* We can not copy a symbolic operand directly into anything other than BASE_REGS for TARGET_ELF. So indicate that a register from BASE_REGS is needed as an intermediate register. */ if (TARGET_ELF && class != BASE_REGS && (GET_CODE (in) == SYMBOL_REF || GET_CODE (in) == LABEL_REF || GET_CODE (in) == CONST)) return BASE_REGS; if (GET_CODE (in) == REG) { regno = REGNO (in); if (regno >= FIRST_PSEUDO_REGISTER) { regno = true_regnum (in); if (regno >= FIRST_PSEUDO_REGISTER) regno = -1; } } else if (GET_CODE (in) == SUBREG) { regno = true_regnum (in); if (regno >= FIRST_PSEUDO_REGISTER) regno = -1; } else regno = -1; /* We can place anything into GENERAL_REGS and can put GENERAL_REGS into anything. */ if (class == GENERAL_REGS || class == BASE_REGS || (regno >= 0 && INT_REGNO_P (regno))) return NO_REGS; /* Constants, memory, and FP registers can go into FP registers. */ if ((regno == -1 || FP_REGNO_P (regno)) && (class == FLOAT_REGS || class == NON_SPECIAL_REGS)) return NO_REGS; /* We can copy among the CR registers. */ if ((class == CR_REGS || class == CR0_REGS) && regno >= 0 && CR_REGNO_P (regno)) return NO_REGS; /* Otherwise, we need GENERAL_REGS. */ return GENERAL_REGS; } /* Given a comparison operation, return the bit number in CCR to test. We know this is a valid comparison. SCC_P is 1 if this is for an scc. That means that %D will have been used instead of %C, so the bits will be in different places. Return -1 if OP isn't a valid comparison for some reason. */ int ccr_bit (op, scc_p) register rtx op; int scc_p; { enum rtx_code code = GET_CODE (op); enum machine_mode cc_mode; int cc_regnum; int base_bit; if (GET_RTX_CLASS (code) != '<') return -1; cc_mode = GET_MODE (XEXP (op, 0)); cc_regnum = REGNO (XEXP (op, 0)); base_bit = 4 * (cc_regnum - 68); /* In CCEQmode cases we have made sure that the result is always in the third bit of the CR field. */ if (cc_mode == CCEQmode) return base_bit + 3; switch (code) { case NE: return scc_p ? base_bit + 3 : base_bit + 2; case EQ: return base_bit + 2; case GT: case GTU: return base_bit + 1; case LT: case LTU: return base_bit; case GE: case GEU: /* If floating-point, we will have done a cror to put the bit in the unordered position. So test that bit. For integer, this is ! LT unless this is an scc insn. */ return cc_mode == CCFPmode || scc_p ? base_bit + 3 : base_bit; case LE: case LEU: return cc_mode == CCFPmode || scc_p ? base_bit + 3 : base_bit + 1; default: abort (); } } /* Return the GOT register, creating it if needed. */ struct rtx_def * rs6000_got_register (value) rtx value; { if (!current_function_uses_pic_offset_table || !pic_offset_table_rtx) { if (reload_in_progress || reload_completed) fatal_insn ("internal error -- needed new GOT register during reload phase to load:", value); current_function_uses_pic_offset_table = 1; pic_offset_table_rtx = gen_rtx_REG (Pmode, GOT_TOC_REGNUM); } return pic_offset_table_rtx; } /* Replace all occurrences of register FROM with an new pseudo register in an insn X. Store the pseudo register used in REG. This is only safe during FINALIZE_PIC, since the registers haven't been setup yet. */ static rtx rs6000_replace_regno (x, from, reg) rtx x; int from; rtx *reg; { register int i, j; register char *fmt; /* Allow this function to make replacements in EXPR_LISTs. */ if (!x) return x; switch (GET_CODE (x)) { case SCRATCH: case PC: case CC0: case CONST_INT: case CONST_DOUBLE: case CONST: case SYMBOL_REF: case LABEL_REF: return x; case REG: if (REGNO (x) == from) { if (! *reg) *reg = pic_offset_table_rtx = gen_reg_rtx (Pmode); return *reg; } return x; default: break; } fmt = GET_RTX_FORMAT (GET_CODE (x)); for (i = GET_RTX_LENGTH (GET_CODE (x)) - 1; i >= 0; i--) { if (fmt[i] == 'e') XEXP (x, i) = rs6000_replace_regno (XEXP (x, i), from, reg); else if (fmt[i] == 'E') for (j = XVECLEN (x, i) - 1; j >= 0; j--) XVECEXP (x, i, j) = rs6000_replace_regno (XVECEXP (x, i, j), from, reg); } return x; } /* By generating position-independent code, when two different programs (A and B) share a common library (libC.a), the text of the library can be shared whether or not the library is linked at the same address for both programs. In some of these environments, position-independent code requires not only the use of different addressing modes, but also special code to enable the use of these addressing modes. The `FINALIZE_PIC' macro serves as a hook to emit these special codes once the function is being compiled into assembly code, but not before. (It is not done before, because in the case of compiling an inline function, it would lead to multiple PIC prologues being included in functions which used inline functions and were compiled to assembly language.) */ void rs6000_finalize_pic () { /* Loop through all of the insns, replacing the special GOT_TOC_REGNUM with an appropriate pseudo register. If we find we need GOT/TOC, add the appropriate init code. */ if (flag_pic && (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS)) { rtx insn = get_insns (); rtx reg = NULL_RTX; rtx first_insn; rtx last_insn = NULL_RTX; if (GET_CODE (insn) == NOTE) insn = next_nonnote_insn (insn); first_insn = insn; for ( ; insn != NULL_RTX; insn = NEXT_INSN (insn)) { if (GET_RTX_CLASS (GET_CODE (insn)) == 'i') { PATTERN (insn) = rs6000_replace_regno (PATTERN (insn), GOT_TOC_REGNUM, ®); if (REG_NOTES (insn)) REG_NOTES (insn) = rs6000_replace_regno (REG_NOTES (insn), GOT_TOC_REGNUM, ®); } if (GET_CODE (insn) != NOTE) last_insn = insn; } if (reg) { rtx init = gen_init_v4_pic (reg); emit_insn_before (init, first_insn); if (!optimize && last_insn) emit_insn_after (gen_rtx_USE (VOIDmode, reg), last_insn); } } } /* Search for any occurrence of the GOT_TOC register marker that should have been eliminated, but may have crept back in. */ void rs6000_reorg (insn) rtx insn; { if (flag_pic && (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS)) { rtx got_reg = gen_rtx_REG (Pmode, GOT_TOC_REGNUM); for ( ; insn != NULL_RTX; insn = NEXT_INSN (insn)) if (GET_RTX_CLASS (GET_CODE (insn)) == 'i' && reg_mentioned_p (got_reg, PATTERN (insn))) fatal_insn ("GOT/TOC register marker not removed:", PATTERN (insn)); } } /* Define the structure for the machine field in struct function. */ struct machine_function { int sysv_varargs_p; int save_toc_p; int fpmem_size; int fpmem_offset; rtx pic_offset_table_rtx; }; /* Functions to save and restore rs6000_fpmem_size. These will be called, via pointer variables, from push_function_context and pop_function_context. */ void rs6000_save_machine_status (p) struct function *p; { struct machine_function *machine = (struct machine_function *) xmalloc (sizeof (struct machine_function)); p->machine = machine; machine->sysv_varargs_p = rs6000_sysv_varargs_p; machine->fpmem_size = rs6000_fpmem_size; machine->fpmem_offset = rs6000_fpmem_offset; machine->pic_offset_table_rtx = pic_offset_table_rtx; } void rs6000_restore_machine_status (p) struct function *p; { struct machine_function *machine = p->machine; rs6000_sysv_varargs_p = machine->sysv_varargs_p; rs6000_fpmem_size = machine->fpmem_size; rs6000_fpmem_offset = machine->fpmem_offset; pic_offset_table_rtx = machine->pic_offset_table_rtx; free (machine); p->machine = (struct machine_function *)0; } /* Do anything needed before RTL is emitted for each function. */ void rs6000_init_expanders () { /* Reset varargs and save TOC indicator */ rs6000_sysv_varargs_p = 0; rs6000_fpmem_size = 0; rs6000_fpmem_offset = 0; pic_offset_table_rtx = (rtx)0; /* Arrange to save and restore machine status around nested functions. */ save_machine_status = rs6000_save_machine_status; restore_machine_status = rs6000_restore_machine_status; } /* Print an operand. Recognize special options, documented below. */ #if TARGET_ELF #define SMALL_DATA_RELOC ((rs6000_sdata == SDATA_EABI) ? "sda21" : "sdarel") #define SMALL_DATA_REG ((rs6000_sdata == SDATA_EABI) ? 0 : 13) #else #define SMALL_DATA_RELOC "sda21" #define SMALL_DATA_REG 0 #endif void print_operand (file, x, code) FILE *file; rtx x; char code; { int i; HOST_WIDE_INT val; /* These macros test for integers and extract the low-order bits. */ #define INT_P(X) \ ((GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST_DOUBLE) \ && GET_MODE (X) == VOIDmode) #define INT_LOWPART(X) \ (GET_CODE (X) == CONST_INT ? INTVAL (X) : CONST_DOUBLE_LOW (X)) switch (code) { case '.': /* Write out an instruction after the call which may be replaced with glue code by the loader. This depends on the AIX version. */ asm_fprintf (file, RS6000_CALL_GLUE); return; case '*': /* Write the register number of the TOC register. */ fputs (TARGET_MINIMAL_TOC ? reg_names[30] : reg_names[2], file); return; case '$': /* Write out either a '.' or '$' for the current location, depending on whether this is Solaris or not. */ putc ((DEFAULT_ABI == ABI_SOLARIS) ? '.' : '$', file); return; case 'A': /* If X is a constant integer whose low-order 5 bits are zero, write 'l'. Otherwise, write 'r'. This is a kludge to fix a bug in the AIX assembler where "sri" with a zero shift count write a trash instruction. */ if (GET_CODE (x) == CONST_INT && (INTVAL (x) & 31) == 0) putc ('l', file); else putc ('r', file); return; case 'b': /* Low-order 16 bits of constant, unsigned. */ if (! INT_P (x)) output_operand_lossage ("invalid %%b value"); fprintf (file, "%d", INT_LOWPART (x) & 0xffff); return; case 'B': /* If the low-order bit is zero, write 'r'; otherwise, write 'l' for 64-bit mask direction. */ putc (((INT_LOWPART(x) & 1) == 0 ? 'r' : 'l'), file); return; case 'C': /* This is an optional cror needed for LE or GE floating-point comparisons. Otherwise write nothing. */ if ((GET_CODE (x) == LE || GET_CODE (x) == GE) && GET_MODE (XEXP (x, 0)) == CCFPmode) { int base_bit = 4 * (REGNO (XEXP (x, 0)) - 68); fprintf (file, "cror %d,%d,%d\n\t", base_bit + 3, base_bit + 2, base_bit + (GET_CODE (x) == GE)); } return; case 'D': /* Similar, except that this is for an scc, so we must be able to encode the test in a single bit that is one. We do the above for any LE, GE, GEU, or LEU and invert the bit for NE. */ if (GET_CODE (x) == LE || GET_CODE (x) == GE || GET_CODE (x) == LEU || GET_CODE (x) == GEU) { int base_bit = 4 * (REGNO (XEXP (x, 0)) - 68); fprintf (file, "cror %d,%d,%d\n\t", base_bit + 3, base_bit + 2, base_bit + (GET_CODE (x) == GE || GET_CODE (x) == GEU)); } else if (GET_CODE (x) == NE) { int base_bit = 4 * (REGNO (XEXP (x, 0)) - 68); fprintf (file, "crnor %d,%d,%d\n\t", base_bit + 3, base_bit + 2, base_bit + 2); } return; case 'E': /* X is a CR register. Print the number of the third bit of the CR */ if (GET_CODE (x) != REG || ! CR_REGNO_P (REGNO (x))) output_operand_lossage ("invalid %%E value"); fprintf(file, "%d", 4 * (REGNO (x) - 68) + 3); return; case 'f': /* X is a CR register. Print the shift count needed to move it to the high-order four bits. */ if (GET_CODE (x) != REG || ! CR_REGNO_P (REGNO (x))) output_operand_lossage ("invalid %%f value"); else fprintf (file, "%d", 4 * (REGNO (x) - 68)); return; case 'F': /* Similar, but print the count for the rotate in the opposite direction. */ if (GET_CODE (x) != REG || ! CR_REGNO_P (REGNO (x))) output_operand_lossage ("invalid %%F value"); else fprintf (file, "%d", 32 - 4 * (REGNO (x) - 68)); return; case 'G': /* X is a constant integer. If it is negative, print "m", otherwise print "z". This is to make a aze or ame insn. */ if (GET_CODE (x) != CONST_INT) output_operand_lossage ("invalid %%G value"); else if (INTVAL (x) >= 0) putc ('z', file); else putc ('m', file); return; case 'h': /* If constant, output low-order five bits. Otherwise, write normally. */ if (INT_P (x)) fprintf (file, "%d", INT_LOWPART (x) & 31); else print_operand (file, x, 0); return; case 'H': /* If constant, output low-order six bits. Otherwise, write normally. */ if (INT_P (x)) fprintf (file, "%d", INT_LOWPART (x) & 63); else print_operand (file, x, 0); return; case 'I': /* Print `i' if this is a constant, else nothing. */ if (INT_P (x)) putc ('i', file); return; case 'j': /* Write the bit number in CCR for jump. */ i = ccr_bit (x, 0); if (i == -1) output_operand_lossage ("invalid %%j code"); else fprintf (file, "%d", i); return; case 'J': /* Similar, but add one for shift count in rlinm for scc and pass scc flag to `ccr_bit'. */ i = ccr_bit (x, 1); if (i == -1) output_operand_lossage ("invalid %%J code"); else /* If we want bit 31, write a shift count of zero, not 32. */ fprintf (file, "%d", i == 31 ? 0 : i + 1); return; case 'k': /* X must be a constant. Write the 1's complement of the constant. */ if (! INT_P (x)) output_operand_lossage ("invalid %%k value"); fprintf (file, "%d", ~ INT_LOWPART (x)); return; case 'L': /* Write second word of DImode or DFmode reference. Works on register or non-indexed memory only. */ if (GET_CODE (x) == REG) fprintf (file, "%s", reg_names[REGNO (x) + 1]); else if (GET_CODE (x) == MEM) { /* Handle possible auto-increment. Since it is pre-increment and we have already done it, we can just use an offset of word. */ if (GET_CODE (XEXP (x, 0)) == PRE_INC || GET_CODE (XEXP (x, 0)) == PRE_DEC) output_address (plus_constant (XEXP (XEXP (x, 0), 0), UNITS_PER_WORD)); else output_address (plus_constant (XEXP (x, 0), UNITS_PER_WORD)); if (small_data_operand (x, GET_MODE (x))) fprintf (file, "@%s(%s)", SMALL_DATA_RELOC, reg_names[SMALL_DATA_REG]); } return; case 'm': /* MB value for a mask operand. */ if (! mask_operand (x, VOIDmode)) output_operand_lossage ("invalid %%m value"); val = INT_LOWPART (x); /* If the high bit is set and the low bit is not, the value is zero. If the high bit is zero, the value is the first 1 bit we find from the left. */ if (val < 0 && (val & 1) == 0) { putc ('0', file); return; } else if (val >= 0) { for (i = 1; i < 32; i++) if ((val <<= 1) < 0) break; fprintf (file, "%d", i); return; } /* Otherwise, look for the first 0 bit from the right. The result is its number plus 1. We know the low-order bit is one. */ for (i = 0; i < 32; i++) if (((val >>= 1) & 1) == 0) break; /* If we ended in ...01, i would be 0. The correct value is 31, so we want 31 - i. */ fprintf (file, "%d", 31 - i); return; case 'M': /* ME value for a mask operand. */ if (! mask_operand (x, VOIDmode)) output_operand_lossage ("invalid %%M value"); val = INT_LOWPART (x); /* If the low bit is set and the high bit is not, the value is 31. If the low bit is zero, the value is the first 1 bit we find from the right. */ if ((val & 1) && val >= 0) { fputs ("31", file); return; } else if ((val & 1) == 0) { for (i = 0; i < 32; i++) if ((val >>= 1) & 1) break; /* If we had ....10, i would be 0. The result should be 30, so we need 30 - i. */ fprintf (file, "%d", 30 - i); return; } /* Otherwise, look for the first 0 bit from the left. The result is its number minus 1. We know the high-order bit is one. */ for (i = 0; i < 32; i++) if ((val <<= 1) >= 0) break; fprintf (file, "%d", i); return; case 'N': /* Write the number of elements in the vector times 4. */ if (GET_CODE (x) != PARALLEL) output_operand_lossage ("invalid %%N value"); fprintf (file, "%d", XVECLEN (x, 0) * 4); return; case 'O': /* Similar, but subtract 1 first. */ if (GET_CODE (x) != PARALLEL) output_operand_lossage ("invalid %%O value"); fprintf (file, "%d", (XVECLEN (x, 0) - 1) * 4); return; case 'p': /* X is a CONST_INT that is a power of two. Output the logarithm. */ if (! INT_P (x) || (i = exact_log2 (INT_LOWPART (x))) < 0) output_operand_lossage ("invalid %%p value"); fprintf (file, "%d", i); return; case 'P': /* The operand must be an indirect memory reference. The result is the register number. */ if (GET_CODE (x) != MEM || GET_CODE (XEXP (x, 0)) != REG || REGNO (XEXP (x, 0)) >= 32) output_operand_lossage ("invalid %%P value"); fprintf (file, "%d", REGNO (XEXP (x, 0))); return; case 'R': /* X is a CR register. Print the mask for `mtcrf'. */ if (GET_CODE (x) != REG || ! CR_REGNO_P (REGNO (x))) output_operand_lossage ("invalid %%R value"); else fprintf (file, "%d", 128 >> (REGNO (x) - 68)); return; case 's': /* Low 5 bits of 32 - value */ if (! INT_P (x)) output_operand_lossage ("invalid %%s value"); fprintf (file, "%d", (32 - INT_LOWPART (x)) & 31); return; case 'S': /* PowerPC64 mask position. All 0's and all 1's are excluded. CONST_INT 32-bit mask is considered sign-extended so any transition must occur within the CONST_INT, not on the boundary. */ if (! mask64_operand (x, VOIDmode)) output_operand_lossage ("invalid %%S value"); val = INT_LOWPART (x); if (val & 1) /* Clear Left */ { for (i = 0; i < HOST_BITS_PER_WIDE_INT; i++) if (!((val >>= 1) & 1)) break; #if HOST_BITS_PER_WIDE_INT == 32 if (GET_CODE (x) == CONST_DOUBLE && i == 32) { val = CONST_DOUBLE_HIGH (x); if (val == 0) --i; else for (i = 32; i < 64; i++) if (!((val >>= 1) & 1)) break; } #endif /* i = index of last set bit from right mask begins at 63 - i from left */ if (i > 63) output_operand_lossage ("%%S computed all 1's mask"); fprintf (file, "%d", 63 - i); return; } else /* Clear Right */ { for (i = 0; i < HOST_BITS_PER_WIDE_INT; i++) if ((val >>= 1) & 1) break; #if HOST_BITS_PER_WIDE_INT == 32 if (GET_CODE (x) == CONST_DOUBLE && i == 32) { val = CONST_DOUBLE_HIGH (x); if (val == (HOST_WIDE_INT) -1) --i; else for (i = 32; i < 64; i++) if ((val >>= 1) & 1) break; } #endif /* i = index of last clear bit from right mask ends at 62 - i from left */ if (i > 62) output_operand_lossage ("%%S computed all 0's mask"); fprintf (file, "%d", 62 - i); return; } case 't': /* Write 12 if this jump operation will branch if true, 4 otherwise. All floating-point operations except NE branch true and integer EQ, LT, GT, LTU and GTU also branch true. */ if (GET_RTX_CLASS (GET_CODE (x)) != '<') output_operand_lossage ("invalid %%t value"); else if ((GET_MODE (XEXP (x, 0)) == CCFPmode && GET_CODE (x) != NE) || GET_CODE (x) == EQ || GET_CODE (x) == LT || GET_CODE (x) == GT || GET_CODE (x) == LTU || GET_CODE (x) == GTU) fputs ("12", file); else putc ('4', file); return; case 'T': /* Opposite of 't': write 4 if this jump operation will branch if true, 12 otherwise. */ if (GET_RTX_CLASS (GET_CODE (x)) != '<') output_operand_lossage ("invalid %%T value"); else if ((GET_MODE (XEXP (x, 0)) == CCFPmode && GET_CODE (x) != NE) || GET_CODE (x) == EQ || GET_CODE (x) == LT || GET_CODE (x) == GT || GET_CODE (x) == LTU || GET_CODE (x) == GTU) putc ('4', file); else fputs ("12", file); return; case 'u': /* High-order 16 bits of constant for use in unsigned operand. */ if (! INT_P (x)) output_operand_lossage ("invalid %%u value"); fprintf (file, "0x%x", (INT_LOWPART (x) >> 16) & 0xffff); return; case 'v': /* High-order 16 bits of constant for use in signed operand. */ if (! INT_P (x)) output_operand_lossage ("invalid %%v value"); { int value = (INT_LOWPART (x) >> 16) & 0xffff; /* Solaris assembler doesn't like lis 0,0x80000 */ if (DEFAULT_ABI == ABI_SOLARIS && (value & 0x8000) != 0) fprintf (file, "%d", value | (~0 << 16)); else fprintf (file, "0x%x", value); return; } case 'U': /* Print `u' if this has an auto-increment or auto-decrement. */ if (GET_CODE (x) == MEM && (GET_CODE (XEXP (x, 0)) == PRE_INC || GET_CODE (XEXP (x, 0)) == PRE_DEC)) putc ('u', file); return; case 'V': /* Print the trap code for this operand. */ switch (GET_CODE (x)) { case EQ: fputs ("eq", file); /* 4 */ break; case NE: fputs ("ne", file); /* 24 */ break; case LT: fputs ("lt", file); /* 16 */ break; case LE: fputs ("le", file); /* 20 */ break; case GT: fputs ("gt", file); /* 8 */ break; case GE: fputs ("ge", file); /* 12 */ break; case LTU: fputs ("llt", file); /* 2 */ break; case LEU: fputs ("lle", file); /* 6 */ break; case GTU: fputs ("lgt", file); /* 1 */ break; case GEU: fputs ("lge", file); /* 5 */ break; default: abort (); } break; case 'w': /* If constant, low-order 16 bits of constant, signed. Otherwise, write normally. */ if (INT_P (x)) fprintf (file, "%d", (INT_LOWPART (x) & 0xffff) - 2 * (INT_LOWPART (x) & 0x8000)); else print_operand (file, x, 0); return; case 'W': /* If constant, low-order 16 bits of constant, unsigned. Otherwise, write normally. */ if (INT_P (x)) fprintf (file, "%d", INT_LOWPART (x) & 0xffff); else print_operand (file, x, 0); return; case 'X': if (GET_CODE (x) == MEM && LEGITIMATE_INDEXED_ADDRESS_P (XEXP (x, 0))) putc ('x', file); return; case 'Y': /* Like 'L', for third word of TImode */ if (GET_CODE (x) == REG) fprintf (file, "%s", reg_names[REGNO (x) + 2]); else if (GET_CODE (x) == MEM) { if (GET_CODE (XEXP (x, 0)) == PRE_INC || GET_CODE (XEXP (x, 0)) == PRE_DEC) output_address (plus_constant (XEXP (XEXP (x, 0), 0), 8)); else output_address (plus_constant (XEXP (x, 0), 8)); if (small_data_operand (x, GET_MODE (x))) fprintf (file, "@%s(%s)", SMALL_DATA_RELOC, reg_names[SMALL_DATA_REG]); } return; case 'z': /* X is a SYMBOL_REF. Write out the name preceded by a period and without any trailing data in brackets. Used for function names. If we are configured for System V (or the embedded ABI) on the PowerPC, do not emit the period, since those systems do not use TOCs and the like. */ if (GET_CODE (x) != SYMBOL_REF) abort (); if (XSTR (x, 0)[0] != '.') { switch (DEFAULT_ABI) { default: abort (); case ABI_AIX: putc ('.', file); break; case ABI_V4: case ABI_AIX_NODESC: case ABI_SOLARIS: break; case ABI_NT: fputs ("..", file); break; } } RS6000_OUTPUT_BASENAME (file, XSTR (x, 0)); return; case 'Z': /* Like 'L', for last word of TImode. */ if (GET_CODE (x) == REG) fprintf (file, "%s", reg_names[REGNO (x) + 3]); else if (GET_CODE (x) == MEM) { if (GET_CODE (XEXP (x, 0)) == PRE_INC || GET_CODE (XEXP (x, 0)) == PRE_DEC) output_address (plus_constant (XEXP (XEXP (x, 0), 0), 12)); else output_address (plus_constant (XEXP (x, 0), 12)); if (small_data_operand (x, GET_MODE (x))) fprintf (file, "@%s(%s)", SMALL_DATA_RELOC, reg_names[SMALL_DATA_REG]); } return; case 0: if (GET_CODE (x) == REG) fprintf (file, "%s", reg_names[REGNO (x)]); else if (GET_CODE (x) == MEM) { /* We need to handle PRE_INC and PRE_DEC here, since we need to know the width from the mode. */ if (GET_CODE (XEXP (x, 0)) == PRE_INC) fprintf (file, "%d(%d)", GET_MODE_SIZE (GET_MODE (x)), REGNO (XEXP (XEXP (x, 0), 0))); else if (GET_CODE (XEXP (x, 0)) == PRE_DEC) fprintf (file, "%d(%d)", - GET_MODE_SIZE (GET_MODE (x)), REGNO (XEXP (XEXP (x, 0), 0))); else output_address (XEXP (x, 0)); } else output_addr_const (file, x); return; default: output_operand_lossage ("invalid %%xn code"); } } /* Print the address of an operand. */ void print_operand_address (file, x) FILE *file; register rtx x; { if (GET_CODE (x) == REG) fprintf (file, "0(%s)", reg_names[ REGNO (x) ]); else if (GET_CODE (x) == SYMBOL_REF || GET_CODE (x) == CONST || GET_CODE (x) == LABEL_REF) { output_addr_const (file, x); if (small_data_operand (x, GET_MODE (x))) fprintf (file, "@%s(%s)", SMALL_DATA_RELOC, reg_names[SMALL_DATA_REG]); #ifdef TARGET_NO_TOC else if (TARGET_NO_TOC) ; #endif else fprintf (file, "(%s)", reg_names[ TARGET_MINIMAL_TOC ? 30 : 2 ]); } else if (GET_CODE (x) == PLUS && GET_CODE (XEXP (x, 1)) == REG) { if (REGNO (XEXP (x, 0)) == 0) fprintf (file, "%s,%s", reg_names[ REGNO (XEXP (x, 1)) ], reg_names[ REGNO (XEXP (x, 0)) ]); else fprintf (file, "%s,%s", reg_names[ REGNO (XEXP (x, 0)) ], reg_names[ REGNO (XEXP (x, 1)) ]); } else if (GET_CODE (x) == PLUS && GET_CODE (XEXP (x, 1)) == CONST_INT) fprintf (file, "%d(%s)", INTVAL (XEXP (x, 1)), reg_names[ REGNO (XEXP (x, 0)) ]); else if (TARGET_ELF && !TARGET_64BIT && GET_CODE (x) == LO_SUM && GET_CODE (XEXP (x, 0)) == REG && CONSTANT_P (XEXP (x, 1))) { output_addr_const (file, XEXP (x, 1)); fprintf (file, "@l(%s)", reg_names[ REGNO (XEXP (x, 0)) ]); } else abort (); } /* This page contains routines that are used to determine what the function prologue and epilogue code will do and write them out. */ /* Return the first fixed-point register that is required to be saved. 32 if none. */ int first_reg_to_save () { int first_reg; /* Find lowest numbered live register. */ for (first_reg = 13; first_reg <= 31; first_reg++) if (regs_ever_live[first_reg]) break; /* If profiling, then we must save/restore every register that contains a parameter before/after the .__mcount call. Use registers from 30 down to 23 to do this. Don't use the frame pointer in reg 31. For now, save enough room for all of the parameter registers. */ if (DEFAULT_ABI == ABI_AIX && profile_flag) if (first_reg > 23) first_reg = 23; return first_reg; } /* Similar, for FP regs. */ int first_fp_reg_to_save () { int first_reg; /* Find lowest numbered live register. */ for (first_reg = 14 + 32; first_reg <= 63; first_reg++) if (regs_ever_live[first_reg]) break; return first_reg; } /* Return non-zero if this function makes calls. */ int rs6000_makes_calls () { rtx insn; /* If we are profiling, we will be making a call to __mcount. Under the System V ABI's, we store the LR directly, so we don't need to do it here. */ if (DEFAULT_ABI == ABI_AIX && profile_flag) return 1; for (insn = get_insns (); insn; insn = next_insn (insn)) if (GET_CODE (insn) == CALL_INSN) return 1; return 0; } /* Calculate the stack information for the current function. This is complicated by having two separate calling sequences, the AIX calling sequence and the V.4 calling sequence. AIX stack frames look like: 32-bit 64-bit SP----> +---------------------------------------+ | back chain to caller | 0 0 +---------------------------------------+ | saved CR | 4 8 (8-11) +---------------------------------------+ | saved LR | 8 16 +---------------------------------------+ | reserved for compilers | 12 24 +---------------------------------------+ | reserved for binders | 16 32 +---------------------------------------+ | saved TOC pointer | 20 40 +---------------------------------------+ | Parameter save area (P) | 24 48 +---------------------------------------+ | Alloca space (A) | 24+P etc. +---------------------------------------+ | Local variable space (L) | 24+P+A +---------------------------------------+ | Float/int conversion temporary (X) | 24+P+A+L +---------------------------------------+ | Save area for GP registers (G) | 24+P+A+X+L +---------------------------------------+ | Save area for FP registers (F) | 24+P+A+X+L+G +---------------------------------------+ old SP->| back chain to caller's caller | +---------------------------------------+ The required alignment for AIX configurations is two words (i.e., 8 or 16 bytes). V.4 stack frames look like: SP----> +---------------------------------------+ | back chain to caller | 0 +---------------------------------------+ | caller's saved LR | 4 +---------------------------------------+ | Parameter save area (P) | 8 +---------------------------------------+ | Alloca space (A) | 8+P +---------------------------------------+ | Varargs save area (V) | 8+P+A +---------------------------------------+ | Local variable space (L) | 8+P+A+V +---------------------------------------+ | Float/int conversion temporary (X) | 8+P+A+V+L +---------------------------------------+ | saved CR (C) | 8+P+A+V+L+X +---------------------------------------+ | Save area for GP registers (G) | 8+P+A+V+L+X+C +---------------------------------------+ | Save area for FP registers (F) | 8+P+A+V+L+X+C+G +---------------------------------------+ old SP->| back chain to caller's caller | +---------------------------------------+ The required alignment for V.4 is 16 bytes, or 8 bytes if -meabi is given. (But note below and in sysv4.h that we require only 8 and may round up the size of our stack frame anyways. The historical reason is early versions of powerpc-linux which didn't properly align the stack at program startup. A happy side-effect is that -mno-eabi libraries can be used with -meabi programs.) A PowerPC Windows/NT frame looks like: SP----> +---------------------------------------+ | back chain to caller | 0 +---------------------------------------+ | reserved | 4 +---------------------------------------+ | reserved | 8 +---------------------------------------+ | reserved | 12 +---------------------------------------+ | reserved | 16 +---------------------------------------+ | reserved | 20 +---------------------------------------+ | Parameter save area (P) | 24 +---------------------------------------+ | Alloca space (A) | 24+P +---------------------------------------+ | Local variable space (L) | 24+P+A +---------------------------------------+ | Float/int conversion temporary (X) | 24+P+A+L +---------------------------------------+ | Save area for FP registers (F) | 24+P+A+L+X +---------------------------------------+ | Possible alignment area (Y) | 24+P+A+L+X+F +---------------------------------------+ | Save area for GP registers (G) | 24+P+A+L+X+F+Y +---------------------------------------+ | Save area for CR (C) | 24+P+A+L+X+F+Y+G +---------------------------------------+ | Save area for TOC (T) | 24+P+A+L+X+F+Y+G+C +---------------------------------------+ | Save area for LR (R) | 24+P+A+L+X+F+Y+G+C+T +---------------------------------------+ old SP->| back chain to caller's caller | +---------------------------------------+ For NT, there is no specific order to save the registers, but in order to support __builtin_return_address, the save area for the link register needs to be in a known place, so we use -4 off of the old SP. To support calls through pointers, we also allocate a fixed slot to store the TOC, -8 off the old SP. The required alignment for NT is 16 bytes. The EABI configuration defaults to the V.4 layout, unless -mcall-aix is used, in which case the AIX layout is used. However, the stack alignment requirements may differ. If -mno-eabi is not given, the required stack alignment is 8 bytes; if -mno-eabi is given, the required alignment is 16 bytes. (But see V.4 comment above.) */ #ifndef ABI_STACK_BOUNDARY #define ABI_STACK_BOUNDARY STACK_BOUNDARY #endif rs6000_stack_t * rs6000_stack_info () { static rs6000_stack_t info, zero_info; rs6000_stack_t *info_ptr = &info; int reg_size = TARGET_32BIT ? 4 : 8; enum rs6000_abi abi; int total_raw_size; /* Zero all fields portably */ info = zero_info; /* Select which calling sequence */ info_ptr->abi = abi = DEFAULT_ABI; /* Calculate which registers need to be saved & save area size */ info_ptr->first_gp_reg_save = first_reg_to_save (); info_ptr->gp_size = reg_size * (32 - info_ptr->first_gp_reg_save); info_ptr->first_fp_reg_save = first_fp_reg_to_save (); info_ptr->fp_size = 8 * (64 - info_ptr->first_fp_reg_save); /* Does this function call anything? */ info_ptr->calls_p = rs6000_makes_calls (); /* Allocate space to save the toc. */ if (abi == ABI_NT && info_ptr->calls_p) { info_ptr->toc_save_p = 1; info_ptr->toc_size = reg_size; } /* Does this machine need the float/int conversion area? */ info_ptr->fpmem_p = regs_ever_live[FPMEM_REGNUM]; /* If this is main and we need to call a function to set things up, save main's arguments around the call. */ #ifdef TARGET_EABI if (TARGET_EABI) #endif { if (strcmp (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)), "main") == 0 && DECL_CONTEXT (current_function_decl) == NULL_TREE) { info_ptr->main_p = 1; #ifdef NAME__MAIN info_ptr->calls_p = 1; if (DECL_ARGUMENTS (current_function_decl)) { int i; tree arg; info_ptr->main_save_p = 1; info_ptr->main_size = 0; for ((i = 0), (arg = DECL_ARGUMENTS (current_function_decl)); arg != NULL_TREE && i < 8; (arg = TREE_CHAIN (arg)), i++) { info_ptr->main_size += reg_size; } } #endif } } /* Determine if we need to save the link register */ if (regs_ever_live[65] || (DEFAULT_ABI == ABI_AIX && profile_flag) #ifdef TARGET_RELOCATABLE || (TARGET_RELOCATABLE && (get_pool_size () != 0)) #endif || (info_ptr->first_fp_reg_save != 64 && !FP_SAVE_INLINE (info_ptr->first_fp_reg_save)) || (abi == ABI_V4 && current_function_calls_alloca) || (abi == ABI_SOLARIS && current_function_calls_alloca) || info_ptr->calls_p) { info_ptr->lr_save_p = 1; regs_ever_live[65] = 1; if (abi == ABI_NT) info_ptr->lr_size = reg_size; } /* Determine if we need to save the condition code registers */ if (regs_ever_live[70] || regs_ever_live[71] || regs_ever_live[72]) { info_ptr->cr_save_p = 1; if (abi == ABI_V4 || abi == ABI_NT || abi == ABI_SOLARIS) info_ptr->cr_size = reg_size; } /* Ensure that fp_save_offset will be aligned to an 8-byte boundary. */ if (info_ptr->fpmem_p) { info_ptr->gp_size = RS6000_ALIGN (info_ptr->gp_size, 8); info_ptr->main_size = RS6000_ALIGN (info_ptr->main_size, 8); } /* Determine various sizes */ info_ptr->reg_size = reg_size; info_ptr->fixed_size = RS6000_SAVE_AREA; info_ptr->varargs_size = RS6000_VARARGS_AREA; info_ptr->vars_size = RS6000_ALIGN (get_frame_size (), 8); info_ptr->parm_size = RS6000_ALIGN (current_function_outgoing_args_size, 8); info_ptr->fpmem_size = (info_ptr->fpmem_p) ? 8 : 0; info_ptr->save_size = RS6000_ALIGN (info_ptr->fp_size + info_ptr->gp_size + info_ptr->cr_size + info_ptr->lr_size + info_ptr->toc_size + info_ptr->main_size, 8); total_raw_size = (info_ptr->vars_size + info_ptr->parm_size + info_ptr->fpmem_size + info_ptr->save_size + info_ptr->varargs_size + info_ptr->fixed_size); info_ptr->total_size = RS6000_ALIGN (total_raw_size, ABI_STACK_BOUNDARY / BITS_PER_UNIT); /* Determine if we need to allocate any stack frame: For AIX we need to push the stack if a frame pointer is needed (because the stack might be dynamically adjusted), if we are debugging, if we make calls, or if the sum of fp_save, gp_save, fpmem, and local variables are more than the space needed to save all non-volatile registers: 32-bit: 18*8 + 19*4 = 220 or 64-bit: 18*8 + 19*8 = 296 For V.4 we don't have the stack cushion that AIX uses, but assume that the debugger can handle stackless frames. */ if (info_ptr->calls_p) info_ptr->push_p = 1; else if (abi == ABI_V4 || abi == ABI_NT || abi == ABI_SOLARIS) info_ptr->push_p = (total_raw_size > info_ptr->fixed_size || (abi == ABI_NT ? info_ptr->lr_save_p : info_ptr->calls_p)); else info_ptr->push_p = (frame_pointer_needed || write_symbols != NO_DEBUG || ((total_raw_size - info_ptr->fixed_size) > (TARGET_32BIT ? 220 : 296))); /* Calculate the offsets */ switch (abi) { case ABI_NONE: default: abort (); case ABI_AIX: case ABI_AIX_NODESC: info_ptr->fp_save_offset = - info_ptr->fp_size; info_ptr->gp_save_offset = info_ptr->fp_save_offset - info_ptr->gp_size; info_ptr->main_save_offset = info_ptr->gp_save_offset - info_ptr->main_size; info_ptr->cr_save_offset = reg_size; /* first word when 64-bit. */ info_ptr->lr_save_offset = 2*reg_size; break; case ABI_V4: case ABI_SOLARIS: info_ptr->fp_save_offset = - info_ptr->fp_size; info_ptr->gp_save_offset = info_ptr->fp_save_offset - info_ptr->gp_size; info_ptr->cr_save_offset = info_ptr->gp_save_offset - info_ptr->cr_size; info_ptr->toc_save_offset = info_ptr->cr_save_offset - info_ptr->toc_size; info_ptr->main_save_offset = info_ptr->toc_save_offset - info_ptr->main_size; info_ptr->lr_save_offset = reg_size; break; case ABI_NT: info_ptr->lr_save_offset = -reg_size; info_ptr->toc_save_offset = info_ptr->lr_save_offset - info_ptr->lr_size; info_ptr->cr_save_offset = info_ptr->toc_save_offset - info_ptr->toc_size; info_ptr->gp_save_offset = info_ptr->cr_save_offset - info_ptr->cr_size - info_ptr->gp_size + reg_size; info_ptr->fp_save_offset = info_ptr->gp_save_offset - info_ptr->fp_size; if (info_ptr->fp_size && ((- info_ptr->fp_save_offset) % 8) != 0) info_ptr->fp_save_offset -= reg_size; info_ptr->main_save_offset = info_ptr->fp_save_offset - info_ptr->main_size; break; } if (info_ptr->fpmem_p) { info_ptr->fpmem_offset = info_ptr->main_save_offset - info_ptr->fpmem_size; rs6000_fpmem_size = info_ptr->fpmem_size; rs6000_fpmem_offset = (info_ptr->push_p ? info_ptr->total_size + info_ptr->fpmem_offset : info_ptr->fpmem_offset); } else info_ptr->fpmem_offset = 0; /* Zero offsets if we're not saving those registers */ if (info_ptr->fp_size == 0) info_ptr->fp_save_offset = 0; if (info_ptr->gp_size == 0) info_ptr->gp_save_offset = 0; if (!info_ptr->lr_save_p) info_ptr->lr_save_offset = 0; if (!info_ptr->cr_save_p) info_ptr->cr_save_offset = 0; if (!info_ptr->toc_save_p) info_ptr->toc_save_offset = 0; if (!info_ptr->main_save_p) info_ptr->main_save_offset = 0; return info_ptr; } void debug_stack_info (info) rs6000_stack_t *info; { char *abi_string; if (!info) info = rs6000_stack_info (); fprintf (stderr, "\nStack information for function %s:\n", ((current_function_decl && DECL_NAME (current_function_decl)) ? IDENTIFIER_POINTER (DECL_NAME (current_function_decl)) : "")); switch (info->abi) { default: abi_string = "Unknown"; break; case ABI_NONE: abi_string = "NONE"; break; case ABI_AIX: abi_string = "AIX"; break; case ABI_AIX_NODESC: abi_string = "AIX"; break; case ABI_V4: abi_string = "V.4"; break; case ABI_SOLARIS: abi_string = "Solaris"; break; case ABI_NT: abi_string = "NT"; break; } fprintf (stderr, "\tABI = %5s\n", abi_string); if (info->first_gp_reg_save != 32) fprintf (stderr, "\tfirst_gp_reg_save = %5d\n", info->first_gp_reg_save); if (info->first_fp_reg_save != 64) fprintf (stderr, "\tfirst_fp_reg_save = %5d\n", info->first_fp_reg_save); if (info->lr_save_p) fprintf (stderr, "\tlr_save_p = %5d\n", info->lr_save_p); if (info->cr_save_p) fprintf (stderr, "\tcr_save_p = %5d\n", info->cr_save_p); if (info->toc_save_p) fprintf (stderr, "\ttoc_save_p = %5d\n", info->toc_save_p); if (info->push_p) fprintf (stderr, "\tpush_p = %5d\n", info->push_p); if (info->calls_p) fprintf (stderr, "\tcalls_p = %5d\n", info->calls_p); if (info->main_p) fprintf (stderr, "\tmain_p = %5d\n", info->main_p); if (info->main_save_p) fprintf (stderr, "\tmain_save_p = %5d\n", info->main_save_p); if (info->fpmem_p) fprintf (stderr, "\tfpmem_p = %5d\n", info->fpmem_p); if (info->gp_save_offset) fprintf (stderr, "\tgp_save_offset = %5d\n", info->gp_save_offset); if (info->fp_save_offset) fprintf (stderr, "\tfp_save_offset = %5d\n", info->fp_save_offset); if (info->lr_save_offset) fprintf (stderr, "\tlr_save_offset = %5d\n", info->lr_save_offset); if (info->cr_save_offset) fprintf (stderr, "\tcr_save_offset = %5d\n", info->cr_save_offset); if (info->toc_save_offset) fprintf (stderr, "\ttoc_save_offset = %5d\n", info->toc_save_offset); if (info->varargs_save_offset) fprintf (stderr, "\tvarargs_save_offset = %5d\n", info->varargs_save_offset); if (info->main_save_offset) fprintf (stderr, "\tmain_save_offset = %5d\n", info->main_save_offset); if (info->fpmem_offset) fprintf (stderr, "\tfpmem_offset = %5d\n", info->fpmem_offset); if (info->total_size) fprintf (stderr, "\ttotal_size = %5d\n", info->total_size); if (info->varargs_size) fprintf (stderr, "\tvarargs_size = %5d\n", info->varargs_size); if (info->vars_size) fprintf (stderr, "\tvars_size = %5d\n", info->vars_size); if (info->parm_size) fprintf (stderr, "\tparm_size = %5d\n", info->parm_size); if (info->fpmem_size) fprintf (stderr, "\tfpmem_size = %5d\n", info->fpmem_size); if (info->fixed_size) fprintf (stderr, "\tfixed_size = %5d\n", info->fixed_size); if (info->gp_size) fprintf (stderr, "\tgp_size = %5d\n", info->gp_size); if (info->fp_size) fprintf (stderr, "\tfp_size = %5d\n", info->fp_size); if (info->lr_size) fprintf (stderr, "\tlr_size = %5d\n", info->cr_size); if (info->cr_size) fprintf (stderr, "\tcr_size = %5d\n", info->cr_size); if (info->toc_size) fprintf (stderr, "\ttoc_size = %5d\n", info->toc_size); if (info->main_size) fprintf (stderr, "\tmain_size = %5d\n", info->main_size); if (info->save_size) fprintf (stderr, "\tsave_size = %5d\n", info->save_size); if (info->reg_size != 4) fprintf (stderr, "\treg_size = %5d\n", info->reg_size); fprintf (stderr, "\n"); } /* Write out an instruction to load the TOC_TABLE address into register 30. This is only needed when TARGET_TOC, TARGET_MINIMAL_TOC, and there is a constant pool. */ void rs6000_output_load_toc_table (file, reg) FILE *file; int reg; { char buf[256]; #ifdef USING_SVR4_H if (TARGET_RELOCATABLE) { ASM_GENERATE_INTERNAL_LABEL (buf, "LCF", rs6000_pic_labelno); fprintf (file, "\tbl "); assemble_name (file, buf); fprintf (file, "\n"); /* possibly create the toc section */ if (!toc_initialized) { toc_section (); function_section (current_function_decl); } /* If not first call in this function, we need to put the different between .LCTOC1 and the address we get to right after the bl. It will mess up disassembling the instructions but that can't be helped. We will later need to bias the address before loading. */ if (rs6000_pic_func_labelno != rs6000_pic_labelno) { char *init_ptr = TARGET_32BIT ? ".long" : ".quad"; char *buf_ptr; ASM_OUTPUT_INTERNAL_LABEL (file, "LCL", rs6000_pic_labelno); ASM_GENERATE_INTERNAL_LABEL (buf, "LCTOC", 1); STRIP_NAME_ENCODING (buf_ptr, buf); fprintf (file, "\t%s %s-", init_ptr, buf_ptr); ASM_GENERATE_INTERNAL_LABEL (buf, "LCF", rs6000_pic_labelno); fprintf (file, "%s\n", buf_ptr); } ASM_OUTPUT_INTERNAL_LABEL (file, "LCF", rs6000_pic_labelno); fprintf (file, "\tmflr %s\n", reg_names[reg]); if (rs6000_pic_func_labelno != rs6000_pic_labelno) asm_fprintf(file, "\t{cal|la} %s,%d(%s)\n", reg_names[reg], (TARGET_32BIT ? 4 : 8), reg_names[reg]); asm_fprintf (file, (TARGET_32BIT) ? "\t{l|lwz} %s,(" : "\tld %s,(", reg_names[0]); ASM_GENERATE_INTERNAL_LABEL (buf, "LCL", rs6000_pic_labelno); assemble_name (file, buf); fputs ("-", file); ASM_GENERATE_INTERNAL_LABEL (buf, "LCF", rs6000_pic_labelno); assemble_name (file, buf); fprintf (file, ")(%s)\n", reg_names[reg]); asm_fprintf (file, "\t{cax|add} %s,%s,%s\n", reg_names[reg], reg_names[0], reg_names[reg]); rs6000_pic_labelno++; } else if (!TARGET_64BIT) { ASM_GENERATE_INTERNAL_LABEL (buf, "LCTOC", 1); asm_fprintf (file, "\t{liu|lis} %s,", reg_names[reg]); assemble_name (file, buf); fputs ("@ha\n", file); asm_fprintf (file, "\t{cal|la} %s,", reg_names[reg]); assemble_name (file, buf); asm_fprintf (file, "@l(%s)\n", reg_names[reg]); } else abort (); #else /* !USING_SVR4_H */ ASM_GENERATE_INTERNAL_LABEL (buf, "LCTOC", 0); asm_fprintf (file, TARGET_32BIT ? "\t{l|lwz} %s," : "\tld %s,", reg_names[reg]); assemble_name (file, buf); asm_fprintf (file, "(%s)\n", reg_names[2]); #endif /* USING_SVR4_H */ } /* Emit the correct code for allocating stack space. If COPY_R12, make sure a copy of the old frame is left in r12. */ void rs6000_allocate_stack_space (file, size, copy_r12) FILE *file; int size; int copy_r12; { int neg_size = -size; if (TARGET_UPDATE) { if (size < 32767) asm_fprintf (file, (TARGET_32BIT) ? "\t{stu|stwu} %s,%d(%s)\n" : "\tstdu %s,%d(%s)\n", reg_names[1], neg_size, reg_names[1]); else { if (copy_r12) fprintf (file, "\tmr %s,%s\n", reg_names[12], reg_names[1]); asm_fprintf (file, "\t{liu|lis} %s,%d\n\t{oril|ori} %s,%s,%d\n", reg_names[0], (neg_size >> 16) & 0xffff, reg_names[0], reg_names[0], neg_size & 0xffff); asm_fprintf (file, (TARGET_32BIT) ? "\t{stux|stwux} %s,%s,%s\n" : "\tstdux %s,%s,%s\n", reg_names[1], reg_names[1], reg_names[0]); } } else { fprintf (file, "\tmr %s,%s\n", reg_names[12], reg_names[1]); if (size < 32767) asm_fprintf (file, "\t{cal|la} %s,%d(%s)\n", reg_names[1], neg_size, reg_names[1]); else { asm_fprintf (file, "\t{liu|lis} %s,%d\n\t{oril|ori} %s,%s,%d\n", reg_names[0], (neg_size >> 16) & 0xffff, reg_names[0], reg_names[0], neg_size & 0xffff); asm_fprintf (file, "\t{cax|add} %s,%s,%s\n", reg_names[1], reg_names[0], reg_names[1]); } asm_fprintf (file, (TARGET_32BIT) ? "\t{st|stw} %s,0(%s)\n" : "\tstd %s,0(%s)\n", reg_names[12], reg_names[1]); } } /* Write function prologue. */ void output_prolog (file, size) FILE *file; int size ATTRIBUTE_UNUSED; { rs6000_stack_t *info = rs6000_stack_info (); int reg_size = info->reg_size; char *store_reg; char *load_reg; int sp_reg = 1; int sp_offset = 0; if (TARGET_32BIT) { store_reg = "\t{st|stw} %s,%d(%s)\n"; load_reg = "\t{l|lwz} %s,%d(%s)\n"; } else { store_reg = "\tstd %s,%d(%s)\n"; load_reg = "\tlld %s,%d(%s)\n"; } if (TARGET_DEBUG_STACK) debug_stack_info (info); /* Write .extern for any function we will call to save and restore fp values. */ if (info->first_fp_reg_save < 64 && !FP_SAVE_INLINE (info->first_fp_reg_save)) fprintf (file, "\t.extern %s%d%s\n\t.extern %s%d%s\n", SAVE_FP_PREFIX, info->first_fp_reg_save - 32, SAVE_FP_SUFFIX, RESTORE_FP_PREFIX, info->first_fp_reg_save - 32, RESTORE_FP_SUFFIX); /* Write .extern for truncation routines, if needed. */ if (rs6000_trunc_used && ! trunc_defined) { fprintf (file, "\t.extern .%s\n\t.extern .%s\n", RS6000_ITRUNC, RS6000_UITRUNC); trunc_defined = 1; } /* Write .extern for AIX common mode routines, if needed. */ if (! TARGET_POWER && ! TARGET_POWERPC && ! common_mode_defined) { fputs ("\t.extern __mulh\n", file); fputs ("\t.extern __mull\n", file); fputs ("\t.extern __divss\n", file); fputs ("\t.extern __divus\n", file); fputs ("\t.extern __quoss\n", file); fputs ("\t.extern __quous\n", file); common_mode_defined = 1; } /* For V.4, update stack before we do any saving and set back pointer. */ if (info->push_p && (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS)) { if (info->total_size < 32767) sp_offset = info->total_size; else sp_reg = 12; rs6000_allocate_stack_space (file, info->total_size, sp_reg == 12); } /* If we use the link register, get it into r0. */ if (info->lr_save_p) asm_fprintf (file, "\tmflr %s\n", reg_names[0]); /* If we need to save CR, put it into r12. */ if (info->cr_save_p && sp_reg != 12) asm_fprintf (file, "\tmfcr %s\n", reg_names[12]); /* Do any required saving of fpr's. If only one or two to save, do it ourself. Otherwise, call function. Note that since they are statically linked, we do not need a nop following them. */ if (FP_SAVE_INLINE (info->first_fp_reg_save)) { int regno = info->first_fp_reg_save; int loc = info->fp_save_offset + sp_offset; for ( ; regno < 64; regno++, loc += 8) asm_fprintf (file, "\tstfd %s,%d(%s)\n", reg_names[regno], loc, reg_names[sp_reg]); } else if (info->first_fp_reg_save != 64) asm_fprintf (file, "\tbl %s%d%s\n", SAVE_FP_PREFIX, info->first_fp_reg_save - 32, SAVE_FP_SUFFIX); /* Now save gpr's. */ if (! TARGET_MULTIPLE || info->first_gp_reg_save == 31 || TARGET_64BIT) { int regno = info->first_gp_reg_save; int loc = info->gp_save_offset + sp_offset; for ( ; regno < 32; regno++, loc += reg_size) asm_fprintf (file, store_reg, reg_names[regno], loc, reg_names[sp_reg]); } else if (info->first_gp_reg_save != 32) asm_fprintf (file, "\t{stm|stmw} %s,%d(%s)\n", reg_names[info->first_gp_reg_save], info->gp_save_offset + sp_offset, reg_names[sp_reg]); /* Save main's arguments if we need to call a function */ #ifdef NAME__MAIN if (info->main_save_p) { int regno; int loc = info->main_save_offset + sp_offset; int size = info->main_size; for (regno = 3; size > 0; regno++, loc += reg_size, size -= reg_size) asm_fprintf (file, store_reg, reg_names[regno], loc, reg_names[sp_reg]); } #endif /* Save lr if we used it. */ if (info->lr_save_p) asm_fprintf (file, store_reg, reg_names[0], info->lr_save_offset + sp_offset, reg_names[sp_reg]); /* Save CR if we use any that must be preserved. */ if (info->cr_save_p) { if (sp_reg == 12) /* If r12 is used to hold the original sp, copy cr now */ { asm_fprintf (file, "\tmfcr %s\n", reg_names[0]); asm_fprintf (file, store_reg, reg_names[0], info->cr_save_offset + sp_offset, reg_names[sp_reg]); } else asm_fprintf (file, store_reg, reg_names[12], info->cr_save_offset + sp_offset, reg_names[sp_reg]); } /* NT needs us to probe the stack frame every 4k pages for large frames, so do it here. */ if (DEFAULT_ABI == ABI_NT && info->total_size > 4096) { if (info->total_size < 32768) { int probe_offset = 4096; while (probe_offset < info->total_size) { asm_fprintf (file, "\t{l|lwz} %s,%d(%s)\n", reg_names[0], -probe_offset, reg_names[1]); probe_offset += 4096; } } else { int probe_iterations = info->total_size / 4096; static int probe_labelno = 0; char buf[256]; if (probe_iterations < 32768) asm_fprintf (file, "\tli %s,%d\n", reg_names[12], probe_iterations); else { asm_fprintf (file, "\tlis %s,%d\n", reg_names[12], probe_iterations >> 16); if (probe_iterations & 0xffff) asm_fprintf (file, "\tori %s,%s,%d\n", reg_names[12], reg_names[12], probe_iterations & 0xffff); } asm_fprintf (file, "\tmtctr %s\n", reg_names[12]); asm_fprintf (file, "\tmr %s,%s\n", reg_names[12], reg_names[1]); ASM_OUTPUT_INTERNAL_LABEL (file, "LCprobe", probe_labelno); asm_fprintf (file, "\t{lu|lwzu} %s,-4096(%s)\n", reg_names[0], reg_names[12]); ASM_GENERATE_INTERNAL_LABEL (buf, "LCprobe", probe_labelno++); fputs ("\tbdnz ", file); assemble_name (file, buf); fputs ("\n", file); } } /* Update stack and set back pointer unless this is V.4, which was done previously */ if (info->push_p && DEFAULT_ABI != ABI_V4 && DEFAULT_ABI != ABI_SOLARIS) rs6000_allocate_stack_space (file, info->total_size, FALSE); /* Set frame pointer, if needed. */ if (frame_pointer_needed) asm_fprintf (file, "\tmr %s,%s\n", reg_names[31], reg_names[1]); #ifdef NAME__MAIN /* If we need to call a function to set things up for main, do so now before dealing with the TOC. */ if (info->main_p) { char *prefix = ""; switch (DEFAULT_ABI) { case ABI_AIX: prefix = "."; break; case ABI_NT: prefix = ".."; break; } fprintf (file, "\tbl %s%s\n", prefix, NAME__MAIN); #ifdef RS6000_CALL_GLUE2 fprintf (file, "\t%s%s%s\n", RS6000_CALL_GLUE2, prefix, NAME_MAIN); #else #ifdef RS6000_CALL_GLUE if (DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_NT) fprintf (file, "\t%s\n", RS6000_CALL_GLUE); #endif #endif if (info->main_save_p) { int regno; int loc; int size = info->main_size; if (info->total_size < 32767) { loc = info->total_size + info->main_save_offset; for (regno = 3; size > 0; regno++, size -= reg_size, loc += reg_size) asm_fprintf (file, load_reg, reg_names[regno], loc, reg_names[1]); } else { int neg_size = info->main_save_offset - info->total_size; loc = 0; asm_fprintf (file, "\t{liu|lis} %s,%d\n\t{oril|ori} %s,%s,%d\n", reg_names[0], (neg_size >> 16) & 0xffff, reg_names[0], reg_names[0], neg_size & 0xffff); asm_fprintf (file, "\t{sf|subf} %s,%s,%s\n", reg_names[0], reg_names[0], reg_names[1]); for (regno = 3; size > 0; regno++, size -= reg_size, loc += reg_size) asm_fprintf (file, load_reg, reg_names[regno], loc, reg_names[0]); } } } #endif /* If TARGET_MINIMAL_TOC, and the constant pool is needed, then load the TOC_TABLE address into register 30. */ if (TARGET_TOC && TARGET_MINIMAL_TOC && get_pool_size () != 0) { #ifdef USING_SVR4_H if (!profile_flag) rs6000_pic_func_labelno = rs6000_pic_labelno; #endif rs6000_output_load_toc_table (file, 30); } if (DEFAULT_ABI == ABI_NT) { assemble_name (file, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); fputs (".b:\n", file); } } /* Write function epilogue. */ void output_epilog (file, size) FILE *file; int size ATTRIBUTE_UNUSED; { rs6000_stack_t *info = rs6000_stack_info (); char *load_reg = (TARGET_32BIT) ? "\t{l|lwz} %s,%d(%s)\n" : "\tld %s,%d(%s)\n"; rtx insn = get_last_insn (); int sp_reg = 1; int sp_offset = 0; /* If the last insn was a BARRIER, we don't have to write anything except the trace table. */ if (GET_CODE (insn) == NOTE) insn = prev_nonnote_insn (insn); if (insn == 0 || GET_CODE (insn) != BARRIER) { /* If we have a frame pointer, a call to alloca, or a large stack frame, restore the old stack pointer using the backchain. Otherwise, we know what size to update it with. */ if (frame_pointer_needed || current_function_calls_alloca || info->total_size > 32767) { /* Under V.4, don't reset the stack pointer until after we're done loading the saved registers. */ if (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) sp_reg = 11; asm_fprintf (file, load_reg, reg_names[sp_reg], 0, reg_names[1]); } else if (info->push_p) { if (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) sp_offset = info->total_size; else asm_fprintf (file, "\t{cal|la} %s,%d(%s)\n", reg_names[1], info->total_size, reg_names[1]); } /* Get the old lr if we saved it. */ if (info->lr_save_p) asm_fprintf (file, load_reg, reg_names[0], info->lr_save_offset + sp_offset, reg_names[sp_reg]); /* Get the old cr if we saved it. */ if (info->cr_save_p) asm_fprintf (file, load_reg, reg_names[12], info->cr_save_offset + sp_offset, reg_names[sp_reg]); /* Set LR here to try to overlap restores below. */ if (info->lr_save_p) asm_fprintf (file, "\tmtlr %s\n", reg_names[0]); /* Restore gpr's. */ if (! TARGET_MULTIPLE || info->first_gp_reg_save == 31 || TARGET_64BIT) { int regno = info->first_gp_reg_save; int loc = info->gp_save_offset + sp_offset; int reg_size = (TARGET_32BIT) ? 4 : 8; for ( ; regno < 32; regno++, loc += reg_size) asm_fprintf (file, load_reg, reg_names[regno], loc, reg_names[sp_reg]); } else if (info->first_gp_reg_save != 32) asm_fprintf (file, "\t{lm|lmw} %s,%d(%s)\n", reg_names[info->first_gp_reg_save], info->gp_save_offset + sp_offset, reg_names[sp_reg]); /* Restore fpr's if we can do it without calling a function. */ if (FP_SAVE_INLINE (info->first_fp_reg_save)) { int regno = info->first_fp_reg_save; int loc = info->fp_save_offset + sp_offset; for ( ; regno < 64; regno++, loc += 8) asm_fprintf (file, "\tlfd %s,%d(%s)\n", reg_names[regno], loc, reg_names[sp_reg]); } /* If we saved cr, restore it here. Just those of cr2, cr3, and cr4 that were used. */ if (info->cr_save_p) asm_fprintf (file, "\tmtcrf %d,%s\n", (regs_ever_live[70] != 0) * 0x20 + (regs_ever_live[71] != 0) * 0x10 + (regs_ever_live[72] != 0) * 0x8, reg_names[12]); /* If this is V.4, unwind the stack pointer after all of the loads have been done */ if (sp_offset != 0) asm_fprintf (file, "\t{cal|la} %s,%d(%s)\n", reg_names[1], sp_offset, reg_names[1]); else if (sp_reg != 1) asm_fprintf (file, "\tmr %s,%s\n", reg_names[1], reg_names[sp_reg]); /* If we have to restore more than two FP registers, branch to the restore function. It will return to our caller. */ if (info->first_fp_reg_save != 64 && !FP_SAVE_INLINE (info->first_fp_reg_save)) asm_fprintf (file, "\tb %s%d%s\n", RESTORE_FP_PREFIX, info->first_fp_reg_save - 32, RESTORE_FP_SUFFIX); else asm_fprintf (file, "\t{br|blr}\n"); } /* Output a traceback table here. See /usr/include/sys/debug.h for info on its format. We don't output a traceback table if -finhibit-size-directive was used. The documentation for -finhibit-size-directive reads ``don't output a @code{.size} assembler directive, or anything else that would cause trouble if the function is split in the middle, and the two halves are placed at locations far apart in memory.'' The traceback table has this property, since it includes the offset from the start of the function to the traceback table itself. System V.4 Powerpc's (and the embedded ABI derived from it) use a different traceback table. */ if (DEFAULT_ABI == ABI_AIX && ! flag_inhibit_size_directive) { char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0); int fixed_parms, float_parms, parm_info; int i; while (*fname == '.') /* V.4 encodes . in the name */ fname++; /* Need label immediately before tbtab, so we can compute its offset from the function start. */ if (*fname == '*') ++fname; ASM_OUTPUT_INTERNAL_LABEL_PREFIX (file, "LT"); ASM_OUTPUT_LABEL (file, fname); /* The .tbtab pseudo-op can only be used for the first eight expressions, since it can't handle the possibly variable length fields that follow. However, if you omit the optional fields, the assembler outputs zeros for all optional fields anyways, giving each variable length field is minimum length (as defined in sys/debug.h). Thus we can not use the .tbtab pseudo-op at all. */ /* An all-zero word flags the start of the tbtab, for debuggers that have to find it by searching forward from the entry point or from the current pc. */ fputs ("\t.long 0\n", file); /* Tbtab format type. Use format type 0. */ fputs ("\t.byte 0,", file); /* Language type. Unfortunately, there doesn't seem to be any official way to get this info, so we use language_string. C is 0. C++ is 9. No number defined for Obj-C, so use the value for C for now. There is no official value for Java, although IBM appears to be using 13. There is no official value for Chill, so we've choosen 44 pseudo-randomly. */ if (! strcmp (language_string, "GNU C") || ! strcmp (language_string, "GNU Obj-C")) i = 0; else if (! strcmp (language_string, "GNU F77")) i = 1; else if (! strcmp (language_string, "GNU Ada")) i = 3; else if (! strcmp (language_string, "GNU Pascal")) i = 2; else if (! strcmp (language_string, "GNU C++")) i = 9; else if (! strcmp (language_string, "GNU Java")) i = 13; else if (! strcmp (language_string, "GNU CHILL")) i = 44; else abort (); fprintf (file, "%d,", i); /* 8 single bit fields: global linkage (not set for C extern linkage, apparently a PL/I convention?), out-of-line epilogue/prologue, offset from start of procedure stored in tbtab, internal function, function has controlled storage, function has no toc, function uses fp, function logs/aborts fp operations. */ /* Assume that fp operations are used if any fp reg must be saved. */ fprintf (file, "%d,", (1 << 5) | ((info->first_fp_reg_save != 64) << 1)); /* 6 bitfields: function is interrupt handler, name present in proc table, function calls alloca, on condition directives (controls stack walks, 3 bits), saves condition reg, saves link reg. */ /* The `function calls alloca' bit seems to be set whenever reg 31 is set up as a frame pointer, even when there is no alloca call. */ fprintf (file, "%d,", ((1 << 6) | (frame_pointer_needed << 5) | (info->cr_save_p << 1) | (info->lr_save_p))); /* 3 bitfields: saves backchain, spare bit, number of fpr saved (6 bits). */ fprintf (file, "%d,", (info->push_p << 7) | (64 - info->first_fp_reg_save)); /* 2 bitfields: spare bits (2 bits), number of gpr saved (6 bits). */ fprintf (file, "%d,", (32 - first_reg_to_save ())); { /* Compute the parameter info from the function decl argument list. */ tree decl; int next_parm_info_bit; next_parm_info_bit = 31; parm_info = 0; fixed_parms = 0; float_parms = 0; for (decl = DECL_ARGUMENTS (current_function_decl); decl; decl = TREE_CHAIN (decl)) { rtx parameter = DECL_INCOMING_RTL (decl); enum machine_mode mode = GET_MODE (parameter); if (GET_CODE (parameter) == REG) { if (GET_MODE_CLASS (mode) == MODE_FLOAT) { int bits; float_parms++; if (mode == SFmode) bits = 0x2; else if (mode == DFmode) bits = 0x3; else abort (); /* If only one bit will fit, don't or in this entry. */ if (next_parm_info_bit > 0) parm_info |= (bits << (next_parm_info_bit - 1)); next_parm_info_bit -= 2; } else { fixed_parms += ((GET_MODE_SIZE (mode) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD); next_parm_info_bit -= 1; } } } } /* Number of fixed point parameters. */ /* This is actually the number of words of fixed point parameters; thus an 8 byte struct counts as 2; and thus the maximum value is 8. */ fprintf (file, "%d,", fixed_parms); /* 2 bitfields: number of floating point parameters (7 bits), parameters all on stack. */ /* This is actually the number of fp registers that hold parameters; and thus the maximum value is 13. */ /* Set parameters on stack bit if parameters are not in their original registers, regardless of whether they are on the stack? Xlc seems to set the bit when not optimizing. */ fprintf (file, "%d\n", ((float_parms << 1) | (! optimize))); /* Optional fields follow. Some are variable length. */ /* Parameter types, left adjusted bit fields: 0 fixed, 10 single float, 11 double float. */ /* There is an entry for each parameter in a register, in the order that they occur in the parameter list. Any intervening arguments on the stack are ignored. If the list overflows a long (max possible length 34 bits) then completely leave off all elements that don't fit. */ /* Only emit this long if there was at least one parameter. */ if (fixed_parms || float_parms) fprintf (file, "\t.long %d\n", parm_info); /* Offset from start of code to tb table. */ fputs ("\t.long ", file); ASM_OUTPUT_INTERNAL_LABEL_PREFIX (file, "LT"); RS6000_OUTPUT_BASENAME (file, fname); fputs ("-.", file); RS6000_OUTPUT_BASENAME (file, fname); putc ('\n', file); /* Interrupt handler mask. */ /* Omit this long, since we never set the interrupt handler bit above. */ /* Number of CTL (controlled storage) anchors. */ /* Omit this long, since the has_ctl bit is never set above. */ /* Displacement into stack of each CTL anchor. */ /* Omit this list of longs, because there are no CTL anchors. */ /* Length of function name. */ fprintf (file, "\t.short %d\n", (int) strlen (fname)); /* Function name. */ assemble_string (fname, strlen (fname)); /* Register for alloca automatic storage; this is always reg 31. Only emit this if the alloca bit was set above. */ if (frame_pointer_needed) fputs ("\t.byte 31\n", file); } if (DEFAULT_ABI == ABI_NT) { RS6000_OUTPUT_BASENAME (file, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); fputs (".e:\nFE_MOT_RESVD..", file); RS6000_OUTPUT_BASENAME (file, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); fputs (":\n", file); } } /* A C compound statement that outputs the assembler code for a thunk function, used to implement C++ virtual function calls with multiple inheritance. The thunk acts as a wrapper around a virtual function, adjusting the implicit object parameter before handing control off to the real function. First, emit code to add the integer DELTA to the location that contains the incoming first argument. Assume that this argument contains a pointer, and is the one used to pass the `this' pointer in C++. This is the incoming argument *before* the function prologue, e.g. `%o0' on a sparc. The addition must preserve the values of all other incoming arguments. After the addition, emit code to jump to FUNCTION, which is a `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch the return address. Hence returning from FUNCTION will return to whoever called the current `thunk'. The effect must be as if FUNCTION had been called directly with the adjusted first argument. This macro is responsible for emitting all of the code for a thunk function; `FUNCTION_PROLOGUE' and `FUNCTION_EPILOGUE' are not invoked. The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been extracted from it.) It might possibly be useful on some targets, but probably not. If you do not define this macro, the target-independent code in the C++ frontend will generate a less efficient heavyweight thunk that calls FUNCTION instead of jumping to it. The generic approach does not support varargs. */ void output_mi_thunk (file, thunk_fndecl, delta, function) FILE *file; tree thunk_fndecl; int delta; tree function; { char *this_reg = reg_names[ aggregate_value_p (TREE_TYPE (function)) ? 3 : 4 ]; char *r0 = reg_names[0]; char *sp = reg_names[1]; char *toc = reg_names[2]; char *schain = reg_names[11]; char *r12 = reg_names[12]; char *prefix; char *fname; char buf[512]; static int labelno = 0; /* Small constants that can be done by one add instruction */ if (delta >= -32768 && delta <= 32767) { if (!TARGET_NEW_MNEMONICS) fprintf (file, "\tcal %s,%d(%s)\n", this_reg, delta, this_reg); else fprintf (file, "\taddi %s,%s,%d\n", this_reg, this_reg, delta); } /* Large constants that can be done by one addis instruction */ else if ((delta & 0xffff) == 0 && num_insns_constant_wide (delta) == 1) asm_fprintf (file, "\t{cau|addis} %s,%s,%d\n", this_reg, this_reg, delta >> 16); /* 32-bit constants that can be done by an add and addis instruction. */ else if (TARGET_32BIT || num_insns_constant_wide (delta) == 1) { /* Break into two pieces, propigating the sign bit from the low word to the upper word. */ int delta_high = delta >> 16; int delta_low = delta & 0xffff; if ((delta_low & 0x8000) != 0) { delta_high++; delta_low = (delta_low ^ 0x8000) - 0x8000; /* sign extend */ } asm_fprintf (file, "\t{cau|addis} %s,%s,%d\n", this_reg, this_reg, delta_high); if (!TARGET_NEW_MNEMONICS) fprintf (file, "\tcal %s,%d(%s)\n", this_reg, delta_low, this_reg); else fprintf (file, "\taddi %s,%s,%d\n", this_reg, this_reg, delta_low); } /* 64-bit constants, fixme */ else abort (); /* Get the prefix in front of the names. */ switch (DEFAULT_ABI) { default: abort (); case ABI_AIX: prefix = "."; break; case ABI_V4: case ABI_AIX_NODESC: case ABI_SOLARIS: prefix = ""; break; case ABI_NT: prefix = ".."; break; } /* If the function is compiled in this module, jump to it directly. Otherwise, load up its address and jump to it. */ fname = XSTR (XEXP (DECL_RTL (function), 0), 0); #if 1 /* For now, just emit a branch always, until we can figure out better when we need to load the address into the count register and emit the slower bctr instruction. */ fprintf (file, "\tb %s", prefix); assemble_name (file, fname); fprintf (file, "\n"); #else if (TREE_ASM_WRITTEN (function) && !lookup_attribute ("longcall", TYPE_ATTRIBUTES (TREE_TYPE (function)))) { fprintf (file, "\tb %s", prefix); assemble_name (file, fname); fprintf (file, "\n"); } else { switch (DEFAULT_ABI) { default: case ABI_NT: abort (); case ABI_AIX: /* Set up a TOC entry for the function. */ ASM_GENERATE_INTERNAL_LABEL (buf, "Lthunk", labelno); toc_section (); ASM_OUTPUT_INTERNAL_LABEL (file, "Lthunk", labelno); labelno++; /* Note, MINIMAL_TOC doesn't make sense in the case of a thunk, since there will be only one TOC entry for this function. */ fputs ("\t.tc\t", file); assemble_name (file, buf); fputs ("[TC],", file); assemble_name (file, buf); putc ('\n', file); text_section (); asm_fprintf (file, (TARGET_32BIT) ? "\t{l|lwz} %s," : "\tld %s", r12); assemble_name (file, buf); asm_fprintf (file, "(%s)\n", reg_names[2]); asm_fprintf (file, (TARGET_32BIT) ? "\t{l|lwz} %s,0(%s)\n" : "\tld %s,0(%s)\n", r0, r12); asm_fprintf (file, (TARGET_32BIT) ? "\t{l|lwz} %s,4(%s)\n" : "\tld %s,8(%s)\n", toc, r12); asm_fprintf (file, "\tmtctr %s\n", r0); asm_fprintf (file, (TARGET_32BIT) ? "\t{l|lwz} %s,8(%s)\n" : "\tld %s,16(%s)\n", schain, r12); asm_fprintf (file, "\tbctr\n"); break; /* Don't use r11, that contains the static chain, just use r0/r12. */ case ABI_V4: case ABI_AIX_NODESC: case ABI_SOLARIS: if (flag_pic == 1) { fprintf (file, "\tmflr %s\n", r0); fputs ("\tbl _GLOBAL_OFFSET_TABLE_@local-4\n", file); asm_fprintf (file, "\tmflr %s\n", r12); asm_fprintf (file, "\tmtlr %s\n", r0); asm_fprintf (file, "\t{l|lwz} %s,", r0); assemble_name (file, fname); asm_fprintf (file, "@got(%s)\n", r12); asm_fprintf (file, "\tmtctr %s\n", r0); asm_fprintf (file, "\tbctr\n"); } #if TARGET_ELF else if (flag_pic > 1 || TARGET_RELOCATABLE) { ASM_GENERATE_INTERNAL_LABEL (buf, "Lthunk", labelno); labelno++; fprintf (file, "\tmflr %s\n", r0); asm_fprintf (file, "\t{st|stw} %s,4(%s)\n", r0, sp); rs6000_pic_func_labelno = rs6000_pic_labelno; rs6000_output_load_toc_table (file, 12); asm_fprintf (file, "\t{l|lwz} %s,", r0); assemble_name (file, buf); asm_fprintf (file, "(%s)\n", r12); asm_fprintf (file, "\t{l|lwz} %s,4(%s)\n", r12, sp); asm_fprintf (file, "\tmtlr %s\n", r12); asm_fprintf (file, "\tmtctr %s\n", r0); asm_fprintf (file, "\tbctr\n"); asm_fprintf (file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); assemble_name (file, buf); fputs (" = .-.LCTOC1\n", file); fputs ("\t.long ", file); assemble_name (file, fname); fputs ("\n\t.previous\n", file); } #endif /* TARGET_ELF */ else { asm_fprintf (file, "\t{liu|lis} %s,", r12); assemble_name (file, fname); asm_fprintf (file, "@ha\n"); asm_fprintf (file, "\t{cal|la} %s,", r12); assemble_name (file, fname); asm_fprintf (file, "@l(%s)\n", r12); asm_fprintf (file, "\tmtctr %s\n", r12); asm_fprintf (file, "\tbctr\n"); } break; } } #endif /* #if 0 out code to use bctr for far away jumps */ } /* Output a TOC entry. We derive the entry name from what is being written. */ void output_toc (file, x, labelno) FILE *file; rtx x; int labelno; { char buf[256]; char *name = buf; char *real_name; rtx base = x; int offset = 0; if (TARGET_NO_TOC) abort (); /* if we're going to put a double constant in the TOC, make sure it's aligned properly when strict alignment is on. */ if (GET_CODE (x) == CONST_DOUBLE && STRICT_ALIGNMENT && GET_MODE (x) == DFmode && ! (TARGET_NO_FP_IN_TOC && ! TARGET_MINIMAL_TOC)) { ASM_OUTPUT_ALIGN (file, 3); } if (TARGET_ELF && TARGET_MINIMAL_TOC) { ASM_OUTPUT_INTERNAL_LABEL_PREFIX (file, "LC"); fprintf (file, "%d = .-", labelno); ASM_OUTPUT_INTERNAL_LABEL_PREFIX (file, "LCTOC"); fputs ("1\n", file); } else ASM_OUTPUT_INTERNAL_LABEL (file, "LC", labelno); /* Handle FP constants specially. Note that if we have a minimal TOC, things we put here aren't actually in the TOC, so we can allow FP constants. */ if (GET_CODE (x) == CONST_DOUBLE && GET_MODE (x) == DFmode && ! (TARGET_NO_FP_IN_TOC && ! TARGET_MINIMAL_TOC)) { REAL_VALUE_TYPE rv; long k[2]; REAL_VALUE_FROM_CONST_DOUBLE (rv, x); REAL_VALUE_TO_TARGET_DOUBLE (rv, k); if (TARGET_64BIT) { if (TARGET_MINIMAL_TOC) fprintf (file, "\t.llong 0x%lx%08lx\n", k[0], k[1]); else fprintf (file, "\t.tc FD_%lx_%lx[TC],0x%lx%08lx\n", k[0], k[1], k[0] & 0xffffffff, k[1] & 0xffffffff); return; } else { if (TARGET_MINIMAL_TOC) fprintf (file, "\t.long %ld\n\t.long %ld\n", k[0], k[1]); else fprintf (file, "\t.tc FD_%lx_%lx[TC],%ld,%ld\n", k[0], k[1], k[0], k[1]); return; } } else if (GET_CODE (x) == CONST_DOUBLE && GET_MODE (x) == SFmode && ! (TARGET_NO_FP_IN_TOC && ! TARGET_MINIMAL_TOC)) { REAL_VALUE_TYPE rv; long l; REAL_VALUE_FROM_CONST_DOUBLE (rv, x); REAL_VALUE_TO_TARGET_SINGLE (rv, l); if (TARGET_MINIMAL_TOC) fprintf (file, TARGET_32BIT ? "\t.long %ld\n" : "\t.llong %ld\n", l); else fprintf (file, "\t.tc FS_%lx[TC],%ld\n", l, l); return; } else if (GET_MODE (x) == DImode && (GET_CODE (x) == CONST_INT || GET_CODE (x) == CONST_DOUBLE) && ! (TARGET_NO_FP_IN_TOC && ! TARGET_MINIMAL_TOC)) { HOST_WIDE_INT low; HOST_WIDE_INT high; if (GET_CODE (x) == CONST_DOUBLE) { low = CONST_DOUBLE_LOW (x); high = CONST_DOUBLE_HIGH (x); } else #if HOST_BITS_PER_WIDE_INT == 32 { low = INTVAL (x); high = (low < 0) ? ~0 : 0; } #else { low = INTVAL (x) & 0xffffffff; high = (HOST_WIDE_INT) INTVAL (x) >> 32; } #endif if (TARGET_64BIT) { if (TARGET_MINIMAL_TOC) fprintf (file, "\t.llong 0x%lx%08lx\n", (long)high, (long)low); else fprintf (file, "\t.tc ID_%lx_%lx[TC],0x%lx%08lx\n", (long)high, (long)low, (long)high, (long)low); return; } else { if (TARGET_MINIMAL_TOC) fprintf (file, "\t.long %ld\n\t.long %ld\n", (long)high, (long)low); else fprintf (file, "\t.tc ID_%lx_%lx[TC],%ld,%ld\n", (long)high, (long)low, (long)high, (long)low); return; } } if (GET_CODE (x) == CONST) { base = XEXP (XEXP (x, 0), 0); offset = INTVAL (XEXP (XEXP (x, 0), 1)); } if (GET_CODE (base) == SYMBOL_REF) name = XSTR (base, 0); else if (GET_CODE (base) == LABEL_REF) ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (XEXP (base, 0))); else if (GET_CODE (base) == CODE_LABEL) ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (base)); else abort (); STRIP_NAME_ENCODING (real_name, name); if (TARGET_MINIMAL_TOC) fputs (TARGET_32BIT ? "\t.long " : "\t.llong ", file); else { fprintf (file, "\t.tc %s", real_name); if (offset < 0) fprintf (file, ".N%d", - offset); else if (offset) fprintf (file, ".P%d", offset); fputs ("[TC],", file); } /* Currently C++ toc references to vtables can be emitted before it is decided whether the vtable is public or private. If this is the case, then the linker will eventually complain that there is a TOC reference to an unknown section. Thus, for vtables only, we emit the TOC reference to reference the symbol and not the section. */ if (!strncmp ("_vt.", name, 4)) { RS6000_OUTPUT_BASENAME (file, name); if (offset < 0) fprintf (file, "%d", offset); else if (offset > 0) fprintf (file, "+%d", offset); } else output_addr_const (file, x); putc ('\n', file); } /* Output an assembler pseudo-op to write an ASCII string of N characters starting at P to FILE. On the RS/6000, we have to do this using the .byte operation and write out special characters outside the quoted string. Also, the assembler is broken; very long strings are truncated, so we must artificially break them up early. */ void output_ascii (file, p, n) FILE *file; char *p; int n; { char c; int i, count_string; char *for_string = "\t.byte \""; char *for_decimal = "\t.byte "; char *to_close = NULL; count_string = 0; for (i = 0; i < n; i++) { c = *p++; if (c >= ' ' && c < 0177) { if (for_string) fputs (for_string, file); putc (c, file); /* Write two quotes to get one. */ if (c == '"') { putc (c, file); ++count_string; } for_string = NULL; for_decimal = "\"\n\t.byte "; to_close = "\"\n"; ++count_string; if (count_string >= 512) { fputs (to_close, file); for_string = "\t.byte \""; for_decimal = "\t.byte "; to_close = NULL; count_string = 0; } } else { if (for_decimal) fputs (for_decimal, file); fprintf (file, "%d", c); for_string = "\n\t.byte \""; for_decimal = ", "; to_close = "\n"; count_string = 0; } } /* Now close the string if we have written one. Then end the line. */ if (to_close) fprintf (file, to_close); } /* Generate a unique section name for FILENAME for a section type represented by SECTION_DESC. Output goes into BUF. SECTION_DESC can be any string, as long as it is different for each possible section type. We name the section in the same manner as xlc. The name begins with an underscore followed by the filename (after stripping any leading directory names) with the last period replaced by the string SECTION_DESC. If FILENAME does not contain a period, SECTION_DESC is appended to the end of the name. */ void rs6000_gen_section_name (buf, filename, section_desc) char **buf; char *filename; char *section_desc; { char *q, *after_last_slash, *last_period; char *p; int len; after_last_slash = filename; for (q = filename; *q; q++) { if (*q == '/') after_last_slash = q + 1; else if (*q == '.') last_period = q; } len = strlen (after_last_slash) + strlen (section_desc) + 2; *buf = (char *) permalloc (len); p = *buf; *p++ = '_'; for (q = after_last_slash; *q; q++) { if (q == last_period) { strcpy (p, section_desc); p += strlen (section_desc); } else if (ISALNUM (*q)) *p++ = *q; } if (last_period == 0) strcpy (p, section_desc); else *p = '\0'; } /* Write function profiler code. */ void output_function_profiler (file, labelno) FILE *file; int labelno; { /* The last used parameter register. */ int last_parm_reg; int i, j; char buf[100]; ASM_GENERATE_INTERNAL_LABEL (buf, "LP", labelno); switch (DEFAULT_ABI) { default: abort (); case ABI_V4: case ABI_SOLARIS: case ABI_AIX_NODESC: fprintf (file, "\tmflr %s\n", reg_names[0]); if (flag_pic == 1) { fputs ("\tbl _GLOBAL_OFFSET_TABLE_@local-4\n", file); asm_fprintf (file, "\t{st|stw} %s,4(%s)\n", reg_names[0], reg_names[1]); asm_fprintf (file, "\tmflr %s\n", reg_names[12]); asm_fprintf (file, "\t{l|lwz} %s,", reg_names[0]); assemble_name (file, buf); asm_fprintf (file, "@got(%s)\n", reg_names[12]); } #if TARGET_ELF else if (flag_pic > 1 || TARGET_RELOCATABLE) { asm_fprintf (file, "\t{st|stw} %s,4(%s)\n", reg_names[0], reg_names[1]); rs6000_pic_func_labelno = rs6000_pic_labelno; rs6000_output_load_toc_table (file, 12); asm_fprintf (file, "\t{l|lwz} %s,", reg_names[12]); assemble_name (file, buf); asm_fprintf (file, "X(%s)\n", reg_names[12]); asm_fprintf (file, "%s\n", MINIMAL_TOC_SECTION_ASM_OP); assemble_name (file, buf); fputs ("X = .-.LCTOC1\n", file); fputs ("\t.long ", file); assemble_name (file, buf); fputs ("\n\t.previous\n", file); } #endif else { asm_fprintf (file, "\t{liu|lis} %s,", reg_names[12]); assemble_name (file, buf); fputs ("@ha\n", file); asm_fprintf (file, "\t{st|stw} %s,4(%s)\n", reg_names[0], reg_names[1]); asm_fprintf (file, "\t{cal|la} %s,", reg_names[0]); assemble_name (file, buf); asm_fprintf (file, "@l(%s)\n", reg_names[12]); } fprintf (file, "\tbl %s\n", RS6000_MCOUNT); break; case ABI_AIX: /* Set up a TOC entry for the profiler label. */ toc_section (); ASM_OUTPUT_INTERNAL_LABEL (file, "LPC", labelno); if (TARGET_MINIMAL_TOC) { fputs (TARGET_32BIT ? "\t.long " : "\t.llong ", file); assemble_name (file, buf); putc ('\n', file); } else { fputs ("\t.tc\t", file); assemble_name (file, buf); fputs ("[TC],", file); assemble_name (file, buf); putc ('\n', file); } text_section (); /* Figure out last used parameter register. The proper thing to do is to walk incoming args of the function. A function might have live parameter registers even if it has no incoming args. */ for (last_parm_reg = 10; last_parm_reg > 2 && ! regs_ever_live [last_parm_reg]; last_parm_reg--) ; /* Save parameter registers in regs 23-30. Don't overwrite reg 31, since it might be set up as the frame pointer. */ for (i = 3, j = 30; i <= last_parm_reg; i++, j--) asm_fprintf (file, "\tmr %d,%d\n", j, i); /* Load location address into r3, and call mcount. */ ASM_GENERATE_INTERNAL_LABEL (buf, "LPC", labelno); asm_fprintf (file, TARGET_32BIT ? "\t{l|lwz} %s," : "\tld %s,", reg_names[3]); assemble_name (file, buf); asm_fprintf (file, "(%s)\n\tbl %s\n\t%s\n", reg_names[2], RS6000_MCOUNT, RS6000_CALL_GLUE); /* Restore parameter registers. */ for (i = 3, j = 30; i <= last_parm_reg; i++, j--) asm_fprintf (file, "\tmr %d,%d\n", i, j); break; } } /* Adjust the cost of a scheduling dependency. Return the new cost of a dependency LINK or INSN on DEP_INSN. COST is the current cost. */ int rs6000_adjust_cost (insn, link, dep_insn, cost) rtx insn; rtx link; rtx dep_insn ATTRIBUTE_UNUSED; int cost; { if (! recog_memoized (insn)) return 0; if (REG_NOTE_KIND (link) != 0) return 0; if (REG_NOTE_KIND (link) == 0) { /* Data dependency; DEP_INSN writes a register that INSN reads some cycles later. */ /* Tell the first scheduling pass about the latency between a mtctr and bctr (and mtlr and br/blr). The first scheduling pass will not know about this latency since the mtctr instruction, which has the latency associated to it, will be generated by reload. */ if (get_attr_type (insn) == TYPE_JMPREG) return TARGET_POWER ? 5 : 4; /* Fall out to return default cost. */ } return cost; } /* Return how many instructions the machine can issue per cycle */ int get_issue_rate() { switch (rs6000_cpu_attr) { case CPU_RIOS1: return 3; /* ? */ case CPU_RIOS2: return 4; case CPU_PPC601: return 3; /* ? */ case CPU_PPC603: return 2; case CPU_PPC604: return 4; case CPU_PPC620: return 4; default: return 1; } } /* Output assembler code for a block containing the constant parts of a trampoline, leaving space for the variable parts. The trampoline should set the static chain pointer to value placed into the trampoline and should branch to the specified routine. */ void rs6000_trampoline_template (file) FILE *file; { char *sc = reg_names[STATIC_CHAIN_REGNUM]; char *r0 = reg_names[0]; char *r2 = reg_names[2]; switch (DEFAULT_ABI) { default: abort (); /* Under AIX, this is not code at all, but merely a data area, since that is the way all functions are called. The first word is the address of the function, the second word is the TOC pointer (r2), and the third word is the static chain value. */ case ABI_AIX: break; /* V.4/eabi function pointers are just a single pointer, so we need to do the full gory code to load up the static chain. */ case ABI_V4: case ABI_SOLARIS: case ABI_AIX_NODESC: break; /* NT function pointers point to a two word area (real address, TOC) which unfortunately does not include a static chain field. So we use the function field to point to ..LTRAMP1 and the toc field to point to the whole table. */ case ABI_NT: if (STATIC_CHAIN_REGNUM == 0 || STATIC_CHAIN_REGNUM == 2 || TARGET_64BIT || !TARGET_NEW_MNEMONICS) abort (); fprintf (file, "\t.ualong 0\n"); /* offset 0 */ fprintf (file, "\t.ualong 0\n"); /* offset 4 */ fprintf (file, "\t.ualong 0\n"); /* offset 8 */ fprintf (file, "\t.ualong 0\n"); /* offset 12 */ fprintf (file, "\t.ualong 0\n"); /* offset 16 */ fprintf (file, "..LTRAMP1..0:\n"); /* offset 20 */ fprintf (file, "\tlwz %s,8(%s)\n", r0, r2); /* offset 24 */ fprintf (file, "\tlwz %s,12(%s)\n", sc, r2); /* offset 28 */ fprintf (file, "\tmtctr %s\n", r0); /* offset 32 */ fprintf (file, "\tlwz %s,16(%s)\n", r2, r2); /* offset 36 */ fprintf (file, "\tbctr\n"); /* offset 40 */ break; } return; } /* Length in units of the trampoline for entering a nested function. */ int rs6000_trampoline_size () { int ret = 0; switch (DEFAULT_ABI) { default: abort (); case ABI_AIX: ret = (TARGET_32BIT) ? 12 : 24; break; case ABI_V4: case ABI_SOLARIS: case ABI_AIX_NODESC: ret = (TARGET_32BIT) ? 40 : 48; break; case ABI_NT: ret = 20; break; } return ret; } /* Emit RTL insns to initialize the variable parts of a trampoline. FNADDR is an RTX for the address of the function's pure code. CXT is an RTX for the static chain value for the function. */ void rs6000_initialize_trampoline (addr, fnaddr, cxt) rtx addr; rtx fnaddr; rtx cxt; { enum machine_mode pmode = Pmode; int regsize = (TARGET_32BIT) ? 4 : 8; rtx ctx_reg = force_reg (pmode, cxt); switch (DEFAULT_ABI) { default: abort (); /* Macros to shorten the code expansions below. */ #define MEM_DEREF(addr) gen_rtx_MEM (pmode, memory_address (pmode, addr)) #define MEM_PLUS(addr,offset) gen_rtx_MEM (pmode, memory_address (pmode, plus_constant (addr, offset))) /* Under AIX, just build the 3 word function descriptor */ case ABI_AIX: { rtx fn_reg = gen_reg_rtx (pmode); rtx toc_reg = gen_reg_rtx (pmode); emit_move_insn (fn_reg, MEM_DEREF (fnaddr)); emit_move_insn (toc_reg, MEM_PLUS (fnaddr, 4)); emit_move_insn (MEM_DEREF (addr), fn_reg); emit_move_insn (MEM_PLUS (addr, regsize), toc_reg); emit_move_insn (MEM_PLUS (addr, 2*regsize), ctx_reg); } break; /* Under V.4/eabi, call __trampoline_setup to do the real work. */ case ABI_V4: case ABI_SOLARIS: case ABI_AIX_NODESC: emit_library_call (gen_rtx_SYMBOL_REF (SImode, "__trampoline_setup"), FALSE, VOIDmode, 4, addr, pmode, GEN_INT (rs6000_trampoline_size ()), SImode, fnaddr, pmode, ctx_reg, pmode); break; /* Under NT, update the first word to point to the ..LTRAMP1..0 header, the second word will point to the whole trampoline, third-fifth words will then have the real address, static chain, and toc value. */ case ABI_NT: { rtx tramp_reg = gen_reg_rtx (pmode); rtx fn_reg = gen_reg_rtx (pmode); rtx toc_reg = gen_reg_rtx (pmode); emit_move_insn (tramp_reg, gen_rtx_SYMBOL_REF (pmode, "..LTRAMP1..0")); addr = force_reg (pmode, addr); emit_move_insn (fn_reg, MEM_DEREF (fnaddr)); emit_move_insn (toc_reg, MEM_PLUS (fnaddr, regsize)); emit_move_insn (MEM_DEREF (addr), tramp_reg); emit_move_insn (MEM_PLUS (addr, regsize), addr); emit_move_insn (MEM_PLUS (addr, 2*regsize), fn_reg); emit_move_insn (MEM_PLUS (addr, 3*regsize), ctx_reg); emit_move_insn (MEM_PLUS (addr, 4*regsize), gen_rtx_REG (pmode, 2)); } break; } return; } /* If defined, a C expression whose value is nonzero if IDENTIFIER with arguments ARGS is a valid machine specific attribute for DECL. The attributes in ATTRIBUTES have previously been assigned to DECL. */ int rs6000_valid_decl_attribute_p (decl, attributes, identifier, args) tree decl ATTRIBUTE_UNUSED; tree attributes ATTRIBUTE_UNUSED; tree identifier ATTRIBUTE_UNUSED; tree args ATTRIBUTE_UNUSED; { return 0; } /* If defined, a C expression whose value is nonzero if IDENTIFIER with arguments ARGS is a valid machine specific attribute for TYPE. The attributes in ATTRIBUTES have previously been assigned to TYPE. */ int rs6000_valid_type_attribute_p (type, attributes, identifier, args) tree type; tree attributes ATTRIBUTE_UNUSED; tree identifier; tree args; { if (TREE_CODE (type) != FUNCTION_TYPE && TREE_CODE (type) != FIELD_DECL && TREE_CODE (type) != TYPE_DECL) return 0; /* Longcall attribute says that the function is not within 2**26 bytes of the current function, and to do an indirect call. */ if (is_attribute_p ("longcall", identifier)) return (args == NULL_TREE); if (DEFAULT_ABI == ABI_NT) { /* Stdcall attribute says callee is responsible for popping arguments if they are not variable. */ if (is_attribute_p ("stdcall", identifier)) return (args == NULL_TREE); /* Cdecl attribute says the callee is a normal C declaration */ if (is_attribute_p ("cdecl", identifier)) return (args == NULL_TREE); /* Dllimport attribute says the caller is to call the function indirectly through a __imp_ pointer. */ if (is_attribute_p ("dllimport", identifier)) return (args == NULL_TREE); /* Dllexport attribute says the callee is to create a __imp_ pointer. */ if (is_attribute_p ("dllexport", identifier)) return (args == NULL_TREE); /* Exception attribute allows the user to specify 1-2 strings or identifiers that will fill in the 3rd and 4th fields of the structured exception table. */ if (is_attribute_p ("exception", identifier)) { int i; if (args == NULL_TREE) return 0; for (i = 0; i < 2 && args != NULL_TREE; i++) { tree this_arg = TREE_VALUE (args); args = TREE_PURPOSE (args); if (TREE_CODE (this_arg) != STRING_CST && TREE_CODE (this_arg) != IDENTIFIER_NODE) return 0; } return (args == NULL_TREE); } } return 0; } /* If defined, a C expression whose value is zero if the attributes on TYPE1 and TYPE2 are incompatible, one if they are compatible, and two if they are nearly compatible (which causes a warning to be generated). */ int rs6000_comp_type_attributes (type1, type2) tree type1 ATTRIBUTE_UNUSED; tree type2 ATTRIBUTE_UNUSED; { return 1; } /* If defined, a C statement that assigns default attributes to newly defined TYPE. */ void rs6000_set_default_type_attributes (type) tree type ATTRIBUTE_UNUSED; { } /* Return a dll import reference corresponding to a call's SYMBOL_REF */ struct rtx_def * rs6000_dll_import_ref (call_ref) rtx call_ref; { char *call_name; int len; char *p; rtx reg1, reg2; tree node; if (GET_CODE (call_ref) != SYMBOL_REF) abort (); call_name = XSTR (call_ref, 0); len = sizeof ("__imp_") + strlen (call_name); p = alloca (len); reg2 = gen_reg_rtx (Pmode); strcpy (p, "__imp_"); strcat (p, call_name); node = get_identifier (p); reg1 = force_reg (Pmode, gen_rtx_SYMBOL_REF (VOIDmode, IDENTIFIER_POINTER (node))); emit_move_insn (reg2, gen_rtx_MEM (Pmode, reg1)); return reg2; } /* Return a reference suitable for calling a function with the longcall attribute. */ struct rtx_def * rs6000_longcall_ref (call_ref) rtx call_ref; { char *call_name; tree node; if (GET_CODE (call_ref) != SYMBOL_REF) return call_ref; /* System V adds '.' to the internal name, so skip them. */ call_name = XSTR (call_ref, 0); if (*call_name == '.') { while (*call_name == '.') call_name++; node = get_identifier (call_name); call_ref = gen_rtx_SYMBOL_REF (VOIDmode, IDENTIFIER_POINTER (node)); } return force_reg (Pmode, call_ref); } /* A C statement or statements to switch to the appropriate section for output of RTX in mode MODE. You can assume that RTX is some kind of constant in RTL. The argument MODE is redundant except in the case of a `const_int' rtx. Select the section by calling `text_section' or one of the alternatives for other sections. Do not define this macro if you put all constants in the read-only data section. */ #ifdef USING_SVR4_H void rs6000_select_rtx_section (mode, x) enum machine_mode mode; rtx x; { if (ASM_OUTPUT_SPECIAL_POOL_ENTRY_P (x)) toc_section (); else const_section (); } /* A C statement or statements to switch to the appropriate section for output of DECL. DECL is either a `VAR_DECL' node or a constant of some sort. RELOC indicates whether forming the initial value of DECL requires link-time relocations. */ void rs6000_select_section (decl, reloc) tree decl; int reloc; { int size = int_size_in_bytes (TREE_TYPE (decl)); if (TREE_CODE (decl) == STRING_CST) { if (! flag_writable_strings) const_section (); else data_section (); } else if (TREE_CODE (decl) == VAR_DECL) { if ((flag_pic && reloc) || !TREE_READONLY (decl) || TREE_SIDE_EFFECTS (decl) || !DECL_INITIAL (decl) || (DECL_INITIAL (decl) != error_mark_node && !TREE_CONSTANT (DECL_INITIAL (decl)))) { if (rs6000_sdata != SDATA_NONE && (size > 0) && (size <= g_switch_value)) sdata_section (); else data_section (); } else { if (rs6000_sdata != SDATA_NONE && (size > 0) && (size <= g_switch_value)) { if (rs6000_sdata == SDATA_EABI) sdata2_section (); else sdata_section (); /* System V doesn't have .sdata2/.sbss2 */ } else const_section (); } } else const_section (); } /* If we are referencing a function that is static or is known to be in this file, make the SYMBOL_REF special. We can use this to indicate that we can branch to this function without emitting a no-op after the call. For real AIX and NT calling sequences, we also replace the function name with the real name (1 or 2 leading .'s), rather than the function descriptor name. This saves a lot of overriding code to read the prefixes. */ void rs6000_encode_section_info (decl) tree decl; { if (TREE_CODE (decl) == FUNCTION_DECL) { rtx sym_ref = XEXP (DECL_RTL (decl), 0); if (TREE_ASM_WRITTEN (decl) || ! TREE_PUBLIC (decl)) SYMBOL_REF_FLAG (sym_ref) = 1; if (DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_NT) { char *prefix = (DEFAULT_ABI == ABI_AIX) ? "." : ".."; char *str = permalloc (strlen (prefix) + 1 + strlen (XSTR (sym_ref, 0))); strcpy (str, prefix); strcat (str, XSTR (sym_ref, 0)); XSTR (sym_ref, 0) = str; } } else if (rs6000_sdata != SDATA_NONE && (DEFAULT_ABI == ABI_V4 || DEFAULT_ABI == ABI_SOLARIS) && TREE_CODE (decl) == VAR_DECL) { int size = int_size_in_bytes (TREE_TYPE (decl)); tree section_name = DECL_SECTION_NAME (decl); char *name = (char *)0; int len = 0; if (section_name) { if (TREE_CODE (section_name) == STRING_CST) { name = TREE_STRING_POINTER (section_name); len = TREE_STRING_LENGTH (section_name); } else abort (); } if ((size > 0 && size <= g_switch_value) || (name && ((len == sizeof (".sdata")-1 && strcmp (name, ".sdata") == 0) || (len == sizeof (".sdata2")-1 && strcmp (name, ".sdata2") == 0) || (len == sizeof (".sbss")-1 && strcmp (name, ".sbss") == 0) || (len == sizeof (".sbss2")-1 && strcmp (name, ".sbss2") == 0) || (len == sizeof (".PPC.EMB.sdata0")-1 && strcmp (name, ".PPC.EMB.sdata0") == 0) || (len == sizeof (".PPC.EMB.sbss0")-1 && strcmp (name, ".PPC.EMB.sbss0") == 0)))) { rtx sym_ref = XEXP (DECL_RTL (decl), 0); char *str = permalloc (2 + strlen (XSTR (sym_ref, 0))); strcpy (str, "@"); strcat (str, XSTR (sym_ref, 0)); XSTR (sym_ref, 0) = str; } } } #endif /* USING_SVR4_H */ void rs6000_fatal_bad_address (op) rtx op; { fatal_insn ("bad address", op); }