1// Copyright 2019 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 5package cpu 6 7const ( 8 // bit mask values from /usr/include/bits/hwcap.h 9 hwcap_ZARCH = 2 10 hwcap_STFLE = 4 11 hwcap_MSA = 8 12 hwcap_LDISP = 16 13 hwcap_EIMM = 32 14 hwcap_DFP = 64 15 hwcap_ETF3EH = 256 16 hwcap_VX = 2048 17 hwcap_VXE = 8192 18) 19 20func initS390Xbase() { 21 // test HWCAP bit vector 22 has := func(featureMask uint) bool { 23 return hwCap&featureMask == featureMask 24 } 25 26 // mandatory 27 S390X.HasZARCH = has(hwcap_ZARCH) 28 29 // optional 30 S390X.HasSTFLE = has(hwcap_STFLE) 31 S390X.HasLDISP = has(hwcap_LDISP) 32 S390X.HasEIMM = has(hwcap_EIMM) 33 S390X.HasETF3EH = has(hwcap_ETF3EH) 34 S390X.HasDFP = has(hwcap_DFP) 35 S390X.HasMSA = has(hwcap_MSA) 36 S390X.HasVX = has(hwcap_VX) 37 if S390X.HasVX { 38 S390X.HasVXE = has(hwcap_VXE) 39 } 40} 41