1// Copyright (c) 2015 Klaus Post, released under MIT License. See LICENSE file.
2
3//+build amd64,!gccgo
4
5// func asmCpuid(op uint32) (eax, ebx, ecx, edx uint32)
6TEXT ·asmCpuid(SB), 7, $0
7	XORQ CX, CX
8	MOVL op+0(FP), AX
9	CPUID
10	MOVL AX, eax+8(FP)
11	MOVL BX, ebx+12(FP)
12	MOVL CX, ecx+16(FP)
13	MOVL DX, edx+20(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 asmXgetbv(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+8(FP)
32	MOVL DX, edx+12(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