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4adea008a5
This CL introduces a new cpu package for CPU/platform feature detection. The cpu package is basically a copy of `internal/cpu` of the standard library. Revision: bf86aec25972f3a100c3aa58a6abcbcc35bdea49 This CL does not export ARM64 and PPC64 feature detection since at the moment ARM64/PPC64 requires standard library support. Updates golang/go#24843 Change-Id: I11bc1ca60b116e902c941b5887c00870dbb1f899 Reviewed-on: https://go-review.googlesource.com/107015 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
27 lines
585 B
ArmAsm
27 lines
585 B
ArmAsm
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build 386 amd64 amd64p32
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#include "textflag.h"
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// func cpuid(eaxArg, ecxArg uint32) (eax, ebx, ecx, edx uint32)
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TEXT ·cpuid(SB), NOSPLIT, $0-24
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MOVL eaxArg+0(FP), AX
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MOVL ecxArg+4(FP), CX
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CPUID
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MOVL AX, eax+8(FP)
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MOVL BX, ebx+12(FP)
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MOVL CX, ecx+16(FP)
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MOVL DX, edx+20(FP)
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RET
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// func xgetbv() (eax, edx uint32)
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TEXT ·xgetbv(SB),NOSPLIT,$0-8
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MOVL $0, CX
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XGETBV
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MOVL AX, eax+0(FP)
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MOVL DX, edx+4(FP)
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RET
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