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Zach LeslieandGitHub
314048dbd8
* Update a few dependencies The primary target for upgrade is the containerd module. In order to keep the calls compatible, the GCP storage module is also updated. * github.com/containerd/containerd * cloud.google.com/go/storage * Clean up azure environment during tests * Update vendor to pin grpc for serverless and go1.17
37 lines
562 B
ArmAsm
37 lines
562 B
ArmAsm
// +build !appengine
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// +build gc
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// +build !noasm
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#include "textflag.h"
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#include "funcdata.h"
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#include "go_asm.h"
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TEXT ยทx86extensions(SB), NOSPLIT, $0
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// 1. determine max EAX value
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XORQ AX, AX
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CPUID
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CMPQ AX, $7
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JB unsupported
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// 2. EAX = 7, ECX = 0 --- see Table 3-8 "Information Returned by CPUID Instruction"
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MOVQ $7, AX
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MOVQ $0, CX
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CPUID
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BTQ $3, BX // bit 3 = BMI1
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SETCS AL
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BTQ $8, BX // bit 8 = BMI2
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SETCS AH
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MOVB AL, bmi1+0(FP)
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MOVB AH, bmi2+1(FP)
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RET
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unsupported:
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XORQ AX, AX
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MOVB AL, bmi1+0(FP)
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MOVB AL, bmi2+1(FP)
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RET
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