File: cpu_x86.s

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golang-github-templexxx-cpufeat 0.0~git20170927.0.3794dfb-5
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build 386 amd64 amd64p32

#include "textflag.h"

// func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)
TEXT ·cpuid(SB), NOSPLIT, $0-24
	MOVL eaxArg+0(FP), AX
	MOVL ecxArg+4(FP), CX
	CPUID
	MOVL AX, eax+8(FP)
	MOVL BX, ebx+12(FP)
	MOVL CX, ecx+16(FP)
	MOVL DX, edx+20(FP)
	RET

// func xgetbv() (eax, edx uint32)
TEXT ·xgetbv(SB),NOSPLIT,$0-8
#ifdef GOOS_nacl
	// nacl does not support XGETBV.
	MOVL $0, eax+0(FP)
	MOVL $0, edx+4(FP)
#else
	MOVL $0, CX
	WORD $0x010f; BYTE $0xd0 //XGETBV
	MOVL AX, eax+0(FP)
	MOVL DX, edx+4(FP)
#endif
	RET