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/* Power ISA 3.0 atomic memory operation include file.
Copyright (C) 2017 Free Software Foundation, Inc.
Contributed by Michael Meissner <meissner@linux.vnet.ibm.com>.
This file is part of GCC.
GCC 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 3, or (at your
option) any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _AMO_H
#define _AMO_H
#if !defined(_ARCH_PWR9) || !defined(_ARCH_PPC64)
#error "The atomic memory operations require Power 64-bit ISA 3.0"
#else
#include <stdint.h>
/* Enumeration of the LWAT/LDAT sub-opcodes. */
enum _AMO_LD {
_AMO_LD_ADD = 0x00, /* Fetch and Add. */
_AMO_LD_XOR = 0x01, /* Fetch and Xor. */
_AMO_LD_IOR = 0x02, /* Fetch and Ior. */
_AMO_LD_AND = 0x03, /* Fetch and And. */
_AMO_LD_UMAX = 0x04, /* Fetch and Unsigned Maximum. */
_AMO_LD_SMAX = 0x05, /* Fetch and Signed Maximum. */
_AMO_LD_UMIN = 0x06, /* Fetch and Unsigned Minimum. */
_AMO_LD_SMIN = 0x07, /* Fetch and Signed Minimum. */
_AMO_LD_SWAP = 0x08, /* Swap. */
_AMO_LD_CS_NE = 0x10, /* Compare and Swap Not Equal. */
_AMO_LD_INC_BOUNDED = 0x18, /* Fetch and Increment Bounded. */
_AMO_LD_INC_EQUAL = 0x19, /* Fetch and Increment Equal. */
_AMO_LD_DEC_BOUNDED = 0x1A /* Fetch and Decrement Bounded. */
};
/* Implementation of the simple LWAT/LDAT operations that take one register and
modify one word or double-word of memory and return the value that was
previously in the memory location.
The LWAT/LDAT opcode requires the address to be a single register, and that
points to a suitably aligned memory location. Asm volatile is used to
prevent the optimizer from moving the operation. */
#define _AMO_LD_SIMPLE(NAME, TYPE, OPCODE, FC) \
static __inline__ TYPE \
NAME (TYPE *_PTR, TYPE _VALUE) \
{ \
unsigned __int128 _TMP; \
TYPE _RET; \
__asm__ volatile ("mr %L1,%3\n" \
"\t" OPCODE " %1,%P0,%4\n" \
"\tmr %2,%1\n" \
: "+Q" (_PTR[0]), "=&r" (_TMP), "=r" (_RET) \
: "r" (_VALUE), "n" (FC)); \
return _RET; \
}
_AMO_LD_SIMPLE (amo_lwat_add, uint32_t, "lwat", _AMO_LD_ADD)
_AMO_LD_SIMPLE (amo_lwat_xor, uint32_t, "lwat", _AMO_LD_XOR)
_AMO_LD_SIMPLE (amo_lwat_ior, uint32_t, "lwat", _AMO_LD_IOR)
_AMO_LD_SIMPLE (amo_lwat_and, uint32_t, "lwat", _AMO_LD_AND)
_AMO_LD_SIMPLE (amo_lwat_umax, uint32_t, "lwat", _AMO_LD_UMAX)
_AMO_LD_SIMPLE (amo_lwat_umin, uint32_t, "lwat", _AMO_LD_UMIN)
_AMO_LD_SIMPLE (amo_lwat_swap, uint32_t, "lwat", _AMO_LD_SWAP)
_AMO_LD_SIMPLE (amo_lwat_sadd, int32_t, "lwat", _AMO_LD_ADD)
_AMO_LD_SIMPLE (amo_lwat_smax, int32_t, "lwat", _AMO_LD_SMAX)
_AMO_LD_SIMPLE (amo_lwat_smin, int32_t, "lwat", _AMO_LD_SMIN)
_AMO_LD_SIMPLE (amo_lwat_sswap, int32_t, "lwat", _AMO_LD_SWAP)
_AMO_LD_SIMPLE (amo_ldat_add, uint64_t, "ldat", _AMO_LD_ADD)
_AMO_LD_SIMPLE (amo_ldat_xor, uint64_t, "ldat", _AMO_LD_XOR)
_AMO_LD_SIMPLE (amo_ldat_ior, uint64_t, "ldat", _AMO_LD_IOR)
_AMO_LD_SIMPLE (amo_ldat_and, uint64_t, "ldat", _AMO_LD_AND)
_AMO_LD_SIMPLE (amo_ldat_umax, uint64_t, "ldat", _AMO_LD_UMAX)
_AMO_LD_SIMPLE (amo_ldat_umin, uint64_t, "ldat", _AMO_LD_UMIN)
_AMO_LD_SIMPLE (amo_ldat_swap, uint64_t, "ldat", _AMO_LD_SWAP)
_AMO_LD_SIMPLE (amo_ldat_sadd, int64_t, "ldat", _AMO_LD_ADD)
_AMO_LD_SIMPLE (amo_ldat_smax, int64_t, "ldat", _AMO_LD_SMAX)
_AMO_LD_SIMPLE (amo_ldat_smin, int64_t, "ldat", _AMO_LD_SMIN)
_AMO_LD_SIMPLE (amo_ldat_sswap, int64_t, "ldat", _AMO_LD_SWAP)
/* Enumeration of the STWAT/STDAT sub-opcodes. */
enum _AMO_ST {
_AMO_ST_ADD = 0x00, /* Store Add. */
_AMO_ST_XOR = 0x01, /* Store Xor. */
_AMO_ST_IOR = 0x02, /* Store Ior. */
_AMO_ST_AND = 0x03, /* Store And. */
_AMO_ST_UMAX = 0x04, /* Store Unsigned Maximum. */
_AMO_ST_SMAX = 0x05, /* Store Signed Maximum. */
_AMO_ST_UMIN = 0x06, /* Store Unsigned Minimum. */
_AMO_ST_SMIN = 0x07, /* Store Signed Minimum. */
_AMO_ST_TWIN = 0x18 /* Store Twin. */
};
/* Implementation of the simple STWAT/STDAT operations that take one register
and modify one word or double-word of memory. No value is returned.
The STWAT/STDAT opcode requires the address to be a single register, and
that points to a suitably aligned memory location. Asm volatile is used to
prevent the optimizer from moving the operation. */
#define _AMO_ST_SIMPLE(NAME, TYPE, OPCODE, FC) \
static __inline__ void \
NAME (TYPE *_PTR, TYPE _VALUE) \
{ \
__asm__ volatile (OPCODE " %1,%P0,%2" \
: "+Q" (_PTR[0]) \
: "r" (_VALUE), "n" (FC)); \
return; \
}
_AMO_ST_SIMPLE (amo_stwat_add, uint32_t, "stwat", _AMO_ST_ADD)
_AMO_ST_SIMPLE (amo_stwat_xor, uint32_t, "stwat", _AMO_ST_XOR)
_AMO_ST_SIMPLE (amo_stwat_ior, uint32_t, "stwat", _AMO_ST_IOR)
_AMO_ST_SIMPLE (amo_stwat_and, uint32_t, "stwat", _AMO_ST_AND)
_AMO_ST_SIMPLE (amo_stwat_umax, uint32_t, "stwat", _AMO_ST_UMAX)
_AMO_ST_SIMPLE (amo_stwat_umin, uint32_t, "stwat", _AMO_ST_UMIN)
_AMO_ST_SIMPLE (amo_stwat_sadd, int32_t, "stwat", _AMO_ST_ADD)
_AMO_ST_SIMPLE (amo_stwat_smax, int32_t, "stwat", _AMO_ST_SMAX)
_AMO_ST_SIMPLE (amo_stwat_smin, int32_t, "stwat", _AMO_ST_SMIN)
_AMO_ST_SIMPLE (amo_stdat_add, uint64_t, "stdat", _AMO_ST_ADD)
_AMO_ST_SIMPLE (amo_stdat_xor, uint64_t, "stdat", _AMO_ST_XOR)
_AMO_ST_SIMPLE (amo_stdat_ior, uint64_t, "stdat", _AMO_ST_IOR)
_AMO_ST_SIMPLE (amo_stdat_and, uint64_t, "stdat", _AMO_ST_AND)
_AMO_ST_SIMPLE (amo_stdat_umax, uint64_t, "stdat", _AMO_ST_UMAX)
_AMO_ST_SIMPLE (amo_stdat_umin, uint64_t, "stdat", _AMO_ST_UMIN)
_AMO_ST_SIMPLE (amo_stdat_sadd, int64_t, "stdat", _AMO_ST_ADD)
_AMO_ST_SIMPLE (amo_stdat_smax, int64_t, "stdat", _AMO_ST_SMAX)
_AMO_ST_SIMPLE (amo_stdat_smin, int64_t, "stdat", _AMO_ST_SMIN)
#endif /* _ARCH_PWR9 && _ARCH_PPC64. */
#endif /* _POWERPC_AMO_H. */
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