forked from mirrors/0ad
janwas
383cf7b220
use intrinsics for cpu_AtomicAdd and cpu_CAS, get rid of the corresponding assembly implementations. (wrapper functions are necessary at work because mere declarations aren't enough to export the functions from DLL) also remove no longer needed fminf This was SVN commit r8521.
83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
/* Copyright (c) 2010 Wildfire Games
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "precompiled.h"
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#if ARCH_AMD64
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#include "lib/sysdep/cpu.h"
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#include "lib/sysdep/arch/amd64/amd64.h"
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void cpu_ConfigureFloatingPoint()
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{
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// 64-bit CPUs use SSE2 for all floating-point operations, so we
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// don't need to change the FPU control word.
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}
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#if MSC_VERSION
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// VC 2008 and ICC 12 differ in their declaration of _Interlocked*
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#if ICC_VERSION
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typedef __int64* P64;
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#else
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typedef volatile __int64* P64;
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#endif
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bool cpu_CAS(volatile intptr_t* location, intptr_t expected, intptr_t newValue)
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{
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const intptr_t initial = _InterlockedCompareExchange64((P64)location, newValue, expected);
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return initial == expected;
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}
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bool cpu_CAS64(volatile i64* location, i64 expected, i64 newValue)
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{
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const i64 initial = _InterlockedCompareExchange64((P64)location, newValue, expected);
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return initial == expected;
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}
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intptr_t cpu_AtomicAdd(volatile intptr_t* location, intptr_t increment)
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{
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return _InterlockedExchangeAdd64((P64)location, increment);
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}
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#elif GCC_VERSION
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intptr_t cpu_AtomicAdd(volatile intptr_t* location, intptr_t increment)
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{
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return __sync_fetch_and_add(location, increment);
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}
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bool cpu_CAS(volatile intptr_t* location, intptr_t expected, intptr_t newValue)
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{
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return __sync_bool_compare_and_swap(location, expected, newValue);
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}
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bool cpu_CAS64(volatile i64* location, i64 expected, i64 newValue)
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{
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return __sync_bool_compare_and_swap(location, expected, newValue);
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}
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#endif
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#endif // ARCH_AMD64
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