mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-19 14:53:56 -07:00
62 lines
2 KiB
NASM
62 lines
2 KiB
NASM
; 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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; For the sym() macro
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%include "../ia32/ia32.inc"
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; For arg0..3
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%include "amd64_abi.inc"
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BITS 64
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; extern "C" void __cdecl amd64_asm_cpuid(Ia32CpuidRegs* reg);
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; reference: http://softwarecommunity.intel.com/articles/eng/2669.htm
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global sym(amd64_asm_cpuid)
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sym(amd64_asm_cpuid):
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push rbx ; rbx is the only caller-save register we clobber
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mov r8, arg0
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mov eax, DWORD [r8+0]
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mov ecx, DWORD [r8+8]
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cpuid
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mov DWORD [r8+0], eax
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mov DWORD [r8+4], ebx
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mov DWORD [r8+8], ecx
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mov DWORD [r8+12], edx
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pop rbx
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ret
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ALIGN 8
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; extern "C" intptr_t amd64_CAS(volatile uintptr_t *location, uintptr_t expected, uintptr_t newValue);
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global sym(amd64_CAS)
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sym(amd64_CAS):
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mov rax, arg1 ; expected -> rax
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lock cmpxchg [arg0], arg2
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sete al
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movzx rax, al
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ret
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; extern "C" void amd64_AtomicAdd(intptr_t *location, intptr_t increment);
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global sym(amd64_AtomicAdd)
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sym(amd64_AtomicAdd):
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lock add [arg0], arg1
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ret
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