cpu_x86.s raw

   1  // Copyright 2017 The Go Authors. All rights reserved.
   2  // Use of this source code is governed by a BSD-style
   3  // license that can be found in the LICENSE file.
   4  
   5  //go:build 386 || amd64
   6  
   7  #include "textflag.h"
   8  
   9  // func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)
  10  TEXT ·cpuid(SB), NOSPLIT, $0-24
  11  	MOVL eaxArg+0(FP), AX
  12  	MOVL ecxArg+4(FP), CX
  13  	CPUID
  14  	MOVL AX, eax+8(FP)
  15  	MOVL BX, ebx+12(FP)
  16  	MOVL CX, ecx+16(FP)
  17  	MOVL DX, edx+20(FP)
  18  	RET
  19  
  20  // func xgetbv() (eax, edx uint32)
  21  TEXT ·xgetbv(SB),NOSPLIT,$0-8
  22  	MOVL $0, CX
  23  	XGETBV
  24  	MOVL AX, eax+0(FP)
  25  	MOVL DX, edx+4(FP)
  26  	RET
  27  
  28  // func getGOAMD64level() int32
  29  TEXT ·getGOAMD64level(SB),NOSPLIT,$0-4
  30  #ifdef GOAMD64_v4
  31  	MOVL $4, ret+0(FP)
  32  #else
  33  #ifdef GOAMD64_v3
  34  	MOVL $3, ret+0(FP)
  35  #else
  36  #ifdef GOAMD64_v2
  37  	MOVL $2, ret+0(FP)
  38  #else
  39  	MOVL $1, ret+0(FP)
  40  #endif
  41  #endif
  42  #endif
  43  	RET
  44