| // 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) |
| } |
| } |
