347 lines
9.5 KiB
C
347 lines
9.5 KiB
C
/*
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* interlocked functions
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*
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* Copyright 1996 Alexandre Julliard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#ifdef __i386__
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#if defined(_MSC_VER)
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__declspec(naked) int interlocked_cmpxchg( int *dest, int xchg, int compare )
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{
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__asm mov eax, 12[esp];
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__asm mov ecx, 8[esp];
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__asm mov edx, 4[esp];
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__asm lock cmpxchg [edx], ecx;
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__asm ret;
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}
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__declspec(naked) void *interlocked_cmpxchg_ptr( void **dest, void *xchg, void *compare )
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{
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__asm mov eax, 12[esp];
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__asm mov ecx, 8[esp];
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__asm mov edx, 4[esp];
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__asm lock cmpxchg [edx], ecx;
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__asm ret;
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}
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__declspec(naked) __int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare)
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{
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__asm push ebx;
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__asm push esi;
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__asm mov esi, 12[esp];
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__asm mov ebx, 16[esp];
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__asm mov ecx, 20[esp];
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__asm mov eax, 24[esp];
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__asm mov edx, 28[esp];
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__asm lock cmpxchg8b [esi];
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__asm pop esi;
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__asm pop ebx;
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__asm ret;
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}
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__declspec(naked) int interlocked_xchg( int *dest, int val )
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{
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__asm mov eax, 8[esp];
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__asm mov edx, 4[esp];
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__asm lock xchg [edx], eax;
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__asm ret;
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}
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__declspec(naked) void *interlocked_xchg_ptr( void **dest, void *val )
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{
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__asm mov eax, 8[esp];
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__asm mov edx, 4[esp];
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__asm lock xchg [edx], eax;
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__asm ret;
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}
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__declspec(naked) int interlocked_xchg_add( int *dest, int incr )
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{
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__asm mov eax, 8[esp];
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__asm mov edx, 4[esp];
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__asm lock xadd [edx], eax;
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__asm ret;
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}
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#else
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/* use gcc compatible asm code as default for __i386__ */
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__ASM_GLOBAL_FUNC(interlocked_cmpxchg,
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"movl 12(%esp),%eax\n\t"
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"movl 8(%esp),%ecx\n\t"
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"movl 4(%esp),%edx\n\t"
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"lock; cmpxchgl %ecx,(%edx)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_cmpxchg_ptr,
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"movl 12(%esp),%eax\n\t"
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"movl 8(%esp),%ecx\n\t"
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"movl 4(%esp),%edx\n\t"
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"lock; cmpxchgl %ecx,(%edx)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_cmpxchg64,
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"push %ebx\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
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__ASM_CFI(".cfi_rel_offset %ebx,0\n\t")
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"push %esi\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
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__ASM_CFI(".cfi_rel_offset %esi,0\n\t")
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"movl 12(%esp),%esi\n\t"
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"movl 16(%esp),%ebx\n\t"
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"movl 20(%esp),%ecx\n\t"
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"movl 24(%esp),%eax\n\t"
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"movl 28(%esp),%edx\n\t"
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"lock; cmpxchg8b (%esi)\n\t"
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"pop %esi\n\t"
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__ASM_CFI(".cfi_same_value %esi\n\t")
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__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
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"pop %ebx\n\t"
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__ASM_CFI(".cfi_same_value %ebx\n\t")
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__ASM_CFI(".cfi_adjust_cfa_offset -4\n\t")
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_xchg,
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"movl 8(%esp),%eax\n\t"
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"movl 4(%esp),%edx\n\t"
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"lock; xchgl %eax,(%edx)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_xchg_ptr,
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"movl 8(%esp),%eax\n\t"
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"movl 4(%esp),%edx\n\t"
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"lock; xchgl %eax,(%edx)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_xchg_add,
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"movl 8(%esp),%eax\n\t"
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"movl 4(%esp),%edx\n\t"
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"lock; xaddl %eax,(%edx)\n\t"
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"ret")
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#endif
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#elif defined(__x86_64__)
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__ASM_GLOBAL_FUNC(interlocked_cmpxchg,
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"mov %edx, %eax\n\t"
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"lock cmpxchgl %esi,(%rdi)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_cmpxchg_ptr,
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"mov %rdx, %rax\n\t"
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"lock cmpxchgq %rsi,(%rdi)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_cmpxchg64,
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"mov %rdx, %rax\n\t"
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"lock cmpxchgq %rsi,(%rdi)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_xchg,
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"mov %esi, %eax\n\t"
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"lock xchgl %eax, (%rdi)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_xchg_ptr,
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"mov %rsi, %rax\n\t"
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"lock xchgq %rax,(%rdi)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_xchg_add,
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"mov %esi, %eax\n\t"
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"lock xaddl %eax, (%rdi)\n\t"
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"ret")
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__ASM_GLOBAL_FUNC(interlocked_cmpxchg128,
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"push %rbx\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset 8\n\t")
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__ASM_CFI(".cfi_rel_offset %rbx,0\n\t")
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"mov %rcx,%r8\n\t" /* compare */
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"mov %rdx,%rbx\n\t" /* xchg_low */
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"mov %rsi,%rcx\n\t" /* xchg_high */
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"mov 0(%r8),%rax\n\t"
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"mov 8(%r8),%rdx\n\t"
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"lock cmpxchg16b (%rdi)\n\t"
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"mov %rax,0(%r8)\n\t"
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"mov %rdx,8(%r8)\n\t"
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"setz %al\n\t"
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"pop %rbx\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset -8\n\t")
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__ASM_CFI(".cfi_same_value %rbx\n\t")
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"ret")
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#elif defined(__powerpc__)
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void* interlocked_cmpxchg_ptr( void **dest, void* xchg, void* compare)
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{
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void *ret = 0;
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void *scratch;
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__asm__ __volatile__(
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"0: lwarx %0,0,%2\n"
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" xor. %1,%4,%0\n"
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" bne 1f\n"
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" stwcx. %3,0,%2\n"
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" bne- 0b\n"
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" isync\n"
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"1: "
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: "=&r"(ret), "=&r"(scratch)
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: "r"(dest), "r"(xchg), "r"(compare)
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: "cr0","memory");
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return ret;
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}
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__int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare)
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{
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/* FIXME: add code */
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assert(0);
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}
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int interlocked_cmpxchg( int *dest, int xchg, int compare)
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{
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int ret = 0;
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int scratch;
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__asm__ __volatile__(
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"0: lwarx %0,0,%2\n"
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" xor. %1,%4,%0\n"
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" bne 1f\n"
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" stwcx. %3,0,%2\n"
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" bne- 0b\n"
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" isync\n"
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"1: "
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: "=&r"(ret), "=&r"(scratch)
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: "r"(dest), "r"(xchg), "r"(compare)
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: "cr0","memory","r0");
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return ret;
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}
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int interlocked_xchg_add( int *dest, int incr )
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{
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int ret = 0;
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int zero = 0;
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__asm__ __volatile__(
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"0: lwarx %0, %3, %1\n"
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" add %0, %2, %0\n"
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" stwcx. %0, %3, %1\n"
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" bne- 0b\n"
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" isync\n"
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: "=&r" (ret)
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: "r"(dest), "r"(incr), "r"(zero)
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: "cr0", "memory", "r0"
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);
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return ret-incr;
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}
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int interlocked_xchg( int* dest, int val )
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{
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int ret = 0;
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__asm__ __volatile__(
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"0: lwarx %0,0,%1\n"
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" stwcx. %2,0,%1\n"
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" bne- 0b\n"
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" isync\n"
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: "=&r"(ret)
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: "r"(dest), "r"(val)
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: "cr0","memory","r0");
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return ret;
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}
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void* interlocked_xchg_ptr( void** dest, void* val )
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{
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void *ret = NULL;
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__asm__ __volatile__(
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"0: lwarx %0,0,%1\n"
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" stwcx. %2,0,%1\n"
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" bne- 0b\n"
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" isync\n"
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: "=&r"(ret)
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: "r"(dest), "r"(val)
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: "cr0","memory","r0");
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return ret;
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}
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#else
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#include <pthread.h>
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static pthread_mutex_t interlocked_mutex = PTHREAD_MUTEX_INITIALIZER;
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int interlocked_cmpxchg( int *dest, int xchg, int compare )
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{
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pthread_mutex_lock( &interlocked_mutex );
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if (*dest == compare)
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*dest = xchg;
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else
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compare = *dest;
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pthread_mutex_unlock( &interlocked_mutex );
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return compare;
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}
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void *interlocked_cmpxchg_ptr( void **dest, void *xchg, void *compare )
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{
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pthread_mutex_lock( &interlocked_mutex );
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if (*dest == compare)
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*dest = xchg;
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else
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compare = *dest;
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pthread_mutex_unlock( &interlocked_mutex );
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return compare;
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}
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__int64 interlocked_cmpxchg64( __int64 *dest, __int64 xchg, __int64 compare )
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{
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pthread_mutex_lock( &interlocked_mutex );
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if (*dest == compare)
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*dest = xchg;
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else
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compare = *dest;
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pthread_mutex_unlock( &interlocked_mutex );
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return compare;
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}
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int interlocked_xchg( int *dest, int val )
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{
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int retv;
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pthread_mutex_lock( &interlocked_mutex );
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retv = *dest;
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*dest = val;
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pthread_mutex_unlock( &interlocked_mutex );
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return retv;
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}
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void *interlocked_xchg_ptr( void **dest, void *val )
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{
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void *retv;
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pthread_mutex_lock( &interlocked_mutex );
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retv = *dest;
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*dest = val;
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pthread_mutex_unlock( &interlocked_mutex );
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return retv;
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}
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int interlocked_xchg_add( int *dest, int incr )
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{
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int retv;
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pthread_mutex_lock( &interlocked_mutex );
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retv = *dest;
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*dest += incr;
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pthread_mutex_unlock( &interlocked_mutex );
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return retv;
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}
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#endif
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