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
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