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/* Special varargs support for i860.
Copyright (C) 2001 Free Software Foundation, Inc.
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.
In addition to the permissions in the GNU General Public License, the
Free Software Foundation gives you unlimited permission to link the
compiled version of this file into combinations with other programs,
and to distribute those combinations without any restriction coming
from the use of this file. (The General Public License restrictions
do apply in other respects; for example, they cover modification of
the file, and distribution when not linked into a combine
executable.)
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. */
#if defined(__svr4__) || defined(__alliant__)
.text
.align 4
/* The Alliant needs the added underscore. */
.globl __builtin_saveregs
__builtin_saveregs:
.globl ___builtin_saveregs
___builtin_saveregs:
andnot 0x0f,%sp,%sp /* round down to 16-byte boundary */
adds -96,%sp,%sp /* allocate stack space for reg save
area and also for a new va_list
structure */
/* Save all argument registers in the arg reg save area. The
arg reg save area must have the following layout (according
to the svr4 ABI):
struct {
union {
float freg[8];
double dreg[4];
} float_regs;
long ireg[12];
};
*/
fst.q %f8, 0(%sp) /* save floating regs (f8-f15) */
fst.q %f12,16(%sp)
st.l %r16,32(%sp) /* save integer regs (r16-r27) */
st.l %r17,36(%sp)
st.l %r18,40(%sp)
st.l %r19,44(%sp)
st.l %r20,48(%sp)
st.l %r21,52(%sp)
st.l %r22,56(%sp)
st.l %r23,60(%sp)
st.l %r24,64(%sp)
st.l %r25,68(%sp)
st.l %r26,72(%sp)
st.l %r27,76(%sp)
adds 80,%sp,%r16 /* compute the address of the new
va_list structure. Put in into
r16 so that it will be returned
to the caller. */
/* Initialize all fields of the new va_list structure. This
structure looks like:
typedef struct {
unsigned long ireg_used;
unsigned long freg_used;
long *reg_base;
long *mem_ptr;
} va_list;
*/
st.l %r0, 0(%r16) /* nfixed */
st.l %r0, 4(%r16) /* nfloating */
st.l %sp, 8(%r16) /* __va_ctl points to __va_struct. */
bri %r1 /* delayed return */
st.l %r28,12(%r16) /* pointer to overflow args */
#else /* not __svr4__ */
#if defined(__PARAGON__)
/*
* we'll use SVR4-ish varargs but need SVR3.2 assembler syntax,
* and we stand a better chance of hooking into libraries
* compiled by PGI. [andyp@ssd.intel.com]
*/
.text
.align 4
.globl __builtin_saveregs
__builtin_saveregs:
.globl ___builtin_saveregs
___builtin_saveregs:
andnot 0x0f,sp,sp /* round down to 16-byte boundary */
adds -96,sp,sp /* allocate stack space for reg save
area and also for a new va_list
structure */
/* Save all argument registers in the arg reg save area. The
arg reg save area must have the following layout (according
to the svr4 ABI):
struct {
union {
float freg[8];
double dreg[4];
} float_regs;
long ireg[12];
};
*/
fst.q f8, 0(sp)
fst.q f12,16(sp)
st.l r16,32(sp)
st.l r17,36(sp)
st.l r18,40(sp)
st.l r19,44(sp)
st.l r20,48(sp)
st.l r21,52(sp)
st.l r22,56(sp)
st.l r23,60(sp)
st.l r24,64(sp)
st.l r25,68(sp)
st.l r26,72(sp)
st.l r27,76(sp)
adds 80,sp,r16 /* compute the address of the new
va_list structure. Put in into
r16 so that it will be returned
to the caller. */
/* Initialize all fields of the new va_list structure. This
structure looks like:
typedef struct {
unsigned long ireg_used;
unsigned long freg_used;
long *reg_base;
long *mem_ptr;
} va_list;
*/
st.l r0, 0(r16) /* nfixed */
st.l r0, 4(r16) /* nfloating */
st.l sp, 8(r16) /* __va_ctl points to __va_struct. */
bri r1 /* delayed return */
st.l r28,12(r16) /* pointer to overflow args */
#else /* not __PARAGON__ */
.text
.align 4
.globl ___builtin_saveregs
___builtin_saveregs:
mov sp,r30
andnot 0x0f,sp,sp
adds -96,sp,sp /* allocate sufficient space on the stack */
/* Fill in the __va_struct. */
st.l r16, 0(sp) /* save integer regs (r16-r27) */
st.l r17, 4(sp) /* int fixed[12] */
st.l r18, 8(sp)
st.l r19,12(sp)
st.l r20,16(sp)
st.l r21,20(sp)
st.l r22,24(sp)
st.l r23,28(sp)
st.l r24,32(sp)
st.l r25,36(sp)
st.l r26,40(sp)
st.l r27,44(sp)
fst.q f8, 48(sp) /* save floating regs (f8-f15) */
fst.q f12,64(sp) /* int floating[8] */
/* Fill in the __va_ctl. */
st.l sp, 80(sp) /* __va_ctl points to __va_struct. */
st.l r28,84(sp) /* pointer to more args */
st.l r0, 88(sp) /* nfixed */
st.l r0, 92(sp) /* nfloating */
adds 80,sp,r16 /* return address of the __va_ctl. */
bri r1
mov r30,sp
/* recover stack and pass address to start
of data. */
#endif /* not __PARAGON__ */
#endif /* not __svr4__ */
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