a72128258b
PR go/89123
internal/cpu, runtime: add S/390 CPU capability support
Patch by Robin Dapp.
Updates https://gcc.gnu.org/PR89123
Reviewed-on: https://go-review.googlesource.com/c/162887
From-SVN: r268941
34 lines
958 B
Go
34 lines
958 B
Go
// Copyright 2016 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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package runtime
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import "internal/cpu"
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const (
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// bit masks taken from bits/hwcap.h
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_HWCAP_S390_ZARCH = 2
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_HWCAP_S390_STFLE = 4
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_HWCAP_S390_MSA = 8
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_HWCAP_S390_LDISP = 16
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_HWCAP_S390_EIMM = 32
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_HWCAP_S390_DFP = 64
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_HWCAP_S390_ETF3EH = 256
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_HWCAP_S390_VX = 2048 // vector facility
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)
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func archauxv(tag, val uintptr) {
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switch tag {
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case _AT_HWCAP: // CPU capability bit flags
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cpu.S390X.HasZArch = val&_HWCAP_S390_ZARCH != 0
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cpu.S390X.HasSTFLE = val&_HWCAP_S390_STFLE != 0
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cpu.S390X.HasMSA = val&_HWCAP_S390_MSA != 0
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cpu.S390X.HasLDisp = val&_HWCAP_S390_LDISP != 0
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cpu.S390X.HasEImm = val&_HWCAP_S390_EIMM != 0
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cpu.S390X.HasDFP = val&_HWCAP_S390_DFP != 0
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cpu.S390X.HasETF3Enhanced = val&_HWCAP_S390_ETF3EH != 0
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cpu.S390X.HasVX = val&_HWCAP_S390_VX != 0
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}
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}
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