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42 lines
967 B
42 lines
967 B
// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
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//+build amd64,!gccgo,!noasm,!appengine
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// func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32)
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TEXT ·asmCpuid(SB), 7, $0
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XORQ CX, CX
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MOVL op+0(FP), AX
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CPUID
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MOVL AX, eax+8(FP)
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MOVL BX, ebx+12(FP)
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MOVL CX, ecx+16(FP)
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MOVL DX, edx+20(FP)
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RET
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// func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32)
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TEXT ·asmCpuidex(SB), 7, $0
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MOVL op+0(FP), AX
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MOVL op2+4(FP), CX
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CPUID
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MOVL AX, eax+8(FP)
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MOVL BX, ebx+12(FP)
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MOVL CX, ecx+16(FP)
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MOVL DX, edx+20(FP)
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RET
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// func asmXgetbv(index uint32) (eax, edx uint32)
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TEXT ·asmXgetbv(SB), 7, $0
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MOVL index+0(FP), CX
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BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV
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MOVL AX, eax+8(FP)
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MOVL DX, edx+12(FP)
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RET
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// func asmRdtscpAsm() (eax, ebx, ecx, edx uint32)
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TEXT ·asmRdtscpAsm(SB), 7, $0
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BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP
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MOVL AX, eax+0(FP)
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MOVL BX, ebx+4(FP)
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MOVL CX, ecx+8(FP)
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MOVL DX, edx+12(FP)
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RET
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