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The GODEBUG environment variable can be used to disable usage of specific processor features of Go programs that use the sys/cpu package. This is useful for testing and benchmarking different code paths that are guarded by sys/cpu variable checks. Use of processor features can not be enabled through GODEBUG. To disable usage of AVX and SSE41 cpu features on GOARCH amd64 use: GODEBUG=cpu.avx=off,cpu.sse41=off The special "all" option can be used to disable all options: GODEBUG=all=off This aligns the support of GODEBUG for sys/cpu with existing support for GODEBUG in the Go standard library package internal/cpu. Fixes golang/go#33963 Change-Id: I618b71af397bf06c57a49b2a300d032a16d05664 Reviewed-on: https://go-review.googlesource.com/c/sys/+/245237 Run-TryBot: Martin Möhrmann <moehrmann@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Martin Möhrmann <moehrmann@google.com> Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
31 lines
1.0 KiB
Go
31 lines
1.0 KiB
Go
// Copyright 2020 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 cpu
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const cacheLineSize = 256
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func initOptions() {
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options = []option{
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{Name: "zarch", Feature: &S390X.HasZARCH},
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{Name: "stfle", Feature: &S390X.HasSTFLE},
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{Name: "ldisp", Feature: &S390X.HasLDISP},
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{Name: "eimm", Feature: &S390X.HasEIMM},
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{Name: "dfp", Feature: &S390X.HasDFP},
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{Name: "etf3eh", Feature: &S390X.HasETF3EH},
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{Name: "msa", Feature: &S390X.HasMSA},
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{Name: "aes", Feature: &S390X.HasAES},
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{Name: "aescbc", Feature: &S390X.HasAESCBC},
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{Name: "aesctr", Feature: &S390X.HasAESCTR},
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{Name: "aesgcm", Feature: &S390X.HasAESGCM},
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{Name: "ghash", Feature: &S390X.HasGHASH},
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{Name: "sha1", Feature: &S390X.HasSHA1},
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{Name: "sha256", Feature: &S390X.HasSHA256},
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{Name: "sha3", Feature: &S390X.HasSHA3},
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{Name: "sha512", Feature: &S390X.HasSHA512},
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{Name: "vx", Feature: &S390X.HasVX},
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{Name: "vxe", Feature: &S390X.HasVXE},
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}
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}
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