cpuid_386.s raw

   1  // Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
   2  
   3  //+build 386,!gccgo,!noasm,!appengine
   4  
   5  // func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32)
   6  TEXT ·asmCpuid(SB), 7, $0
   7  	XORL CX, CX
   8  	MOVL op+0(FP), AX
   9  	CPUID
  10  	MOVL AX, eax+4(FP)
  11  	MOVL BX, ebx+8(FP)
  12  	MOVL CX, ecx+12(FP)
  13  	MOVL DX, edx+16(FP)
  14  	RET
  15  
  16  // func asmCpuidex(op, op2 uint32) (eax, ebx, ecx, edx uint32)
  17  TEXT ·asmCpuidex(SB), 7, $0
  18  	MOVL op+0(FP), AX
  19  	MOVL op2+4(FP), CX
  20  	CPUID
  21  	MOVL AX, eax+8(FP)
  22  	MOVL BX, ebx+12(FP)
  23  	MOVL CX, ecx+16(FP)
  24  	MOVL DX, edx+20(FP)
  25  	RET
  26  
  27  // func xgetbv(index uint32) (eax, edx uint32)
  28  TEXT ·asmXgetbv(SB), 7, $0
  29  	MOVL index+0(FP), CX
  30  	BYTE $0x0f; BYTE $0x01; BYTE $0xd0 // XGETBV
  31  	MOVL AX, eax+4(FP)
  32  	MOVL DX, edx+8(FP)
  33  	RET
  34  
  35  // func asmRdtscpAsm() (eax, ebx, ecx, edx uint32)
  36  TEXT ·asmRdtscpAsm(SB), 7, $0
  37  	BYTE $0x0F; BYTE $0x01; BYTE $0xF9 // RDTSCP
  38  	MOVL AX, eax+0(FP)
  39  	MOVL BX, ebx+4(FP)
  40  	MOVL CX, ecx+8(FP)
  41  	MOVL DX, edx+12(FP)
  42  	RET
  43  
  44  // func asmDarwinHasAVX512() bool
  45  TEXT ·asmDarwinHasAVX512(SB), 7, $0
  46  	MOVL $0, eax+0(FP)
  47  	RET
  48