f5ec13f15d
In internal/bytealg correct a +build tag to never build indexbyte_generic.go
for the gofrontend, where we always use indexbyte_native.go.
For internal/cpu let the Makefile define CacheLineSize using goarch.sh,
rather than trying to enumerate all the possibilities in cpu_ARCH.go files.
In internal/poll call the C fcntl function rather than using SYS_FCNTL.
Change mksysinfo.sh to ensure that F_GETPIPE_SZ is always defined,
and check that in internal/poll.
Reviewed-on: https://go-review.googlesource.com/137256
From-SVN: r264572
67 lines
2.0 KiB
Go
67 lines
2.0 KiB
Go
// Copyright 2017 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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// +build ppc64 ppc64le
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package cpu
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// ppc64x doesn't have a 'cpuid' equivalent, so we rely on HWCAP/HWCAP2.
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// These are initialized by archauxv in runtime/os_linux_ppc64x.go.
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// These should not be changed after they are initialized.
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var HWCap uint
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var HWCap2 uint
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// HWCAP/HWCAP2 bits. These are exposed by the kernel.
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const (
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// ISA Level
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_PPC_FEATURE2_ARCH_2_07 = 0x80000000
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_PPC_FEATURE2_ARCH_3_00 = 0x00800000
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// CPU features
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_PPC_FEATURE_HAS_ALTIVEC = 0x10000000
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_PPC_FEATURE_HAS_DFP = 0x00000400
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_PPC_FEATURE_HAS_VSX = 0x00000080
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_PPC_FEATURE2_HAS_HTM = 0x40000000
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_PPC_FEATURE2_HAS_ISEL = 0x08000000
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_PPC_FEATURE2_HAS_VEC_CRYPTO = 0x02000000
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_PPC_FEATURE2_HTM_NOSC = 0x01000000
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_PPC_FEATURE2_DARN = 0x00200000
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_PPC_FEATURE2_SCV = 0x00100000
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)
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func doinit() {
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options = []option{
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{"htm", &PPC64.HasHTM},
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{"htmnosc", &PPC64.HasHTMNOSC},
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{"darn", &PPC64.HasDARN},
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{"scv", &PPC64.HasSCV},
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// These capabilities should always be enabled on ppc64 and ppc64le:
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// {"vmx", &PPC64.HasVMX},
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// {"dfp", &PPC64.HasDFP},
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// {"vsx", &PPC64.HasVSX},
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// {"isel", &PPC64.HasISEL},
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// {"vcrypto", &PPC64.HasVCRYPTO},
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}
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// HWCAP feature bits
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PPC64.HasVMX = isSet(HWCap, _PPC_FEATURE_HAS_ALTIVEC)
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PPC64.HasDFP = isSet(HWCap, _PPC_FEATURE_HAS_DFP)
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PPC64.HasVSX = isSet(HWCap, _PPC_FEATURE_HAS_VSX)
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// HWCAP2 feature bits
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PPC64.IsPOWER8 = isSet(HWCap2, _PPC_FEATURE2_ARCH_2_07)
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PPC64.HasHTM = isSet(HWCap2, _PPC_FEATURE2_HAS_HTM)
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PPC64.HasISEL = isSet(HWCap2, _PPC_FEATURE2_HAS_ISEL)
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PPC64.HasVCRYPTO = isSet(HWCap2, _PPC_FEATURE2_HAS_VEC_CRYPTO)
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PPC64.HasHTMNOSC = isSet(HWCap2, _PPC_FEATURE2_HTM_NOSC)
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PPC64.IsPOWER9 = isSet(HWCap2, _PPC_FEATURE2_ARCH_3_00)
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PPC64.HasDARN = isSet(HWCap2, _PPC_FEATURE2_DARN)
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PPC64.HasSCV = isSet(HWCap2, _PPC_FEATURE2_SCV)
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}
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func isSet(hwc uint, value uint) bool {
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return hwc&value != 0
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}
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