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cpuid_386.s (1057B)

      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