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- // Copyright 2019 The Go Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style
- // license that can be found in the LICENSE file.
- package cpu
- const (
- // bit mask values from /usr/include/bits/hwcap.h
- hwcap_ZARCH = 2
- hwcap_STFLE = 4
- hwcap_MSA = 8
- hwcap_LDISP = 16
- hwcap_EIMM = 32
- hwcap_DFP = 64
- hwcap_ETF3EH = 256
- hwcap_VX = 2048
- hwcap_VXE = 8192
- )
- func initS390Xbase() {
- // test HWCAP bit vector
- has := func(featureMask uint) bool {
- return hwCap&featureMask == featureMask
- }
- // mandatory
- S390X.HasZARCH = has(hwcap_ZARCH)
- // optional
- S390X.HasSTFLE = has(hwcap_STFLE)
- S390X.HasLDISP = has(hwcap_LDISP)
- S390X.HasEIMM = has(hwcap_EIMM)
- S390X.HasETF3EH = has(hwcap_ETF3EH)
- S390X.HasDFP = has(hwcap_DFP)
- S390X.HasMSA = has(hwcap_MSA)
- S390X.HasVX = has(hwcap_VX)
- if S390X.HasVX {
- S390X.HasVXE = has(hwcap_VXE)
- }
- }
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