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)
6TEXT ·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)
17TEXT ·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)
28TEXT ·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)
36TEXT ·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
45TEXT ·asmDarwinHasAVX512(SB), 7, $0
46 MOVL $0, eax+0(FP)
47 RET
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