github.com/twelsh-aw/go/src@v0.0.0-20230516233729-a56fe86a7c81/runtime/cpuflags.go (about)

     1  // Copyright 2018 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  
     5  package runtime
     6  
     7  import (
     8  	"internal/cpu"
     9  	"unsafe"
    10  )
    11  
    12  // Offsets into internal/cpu records for use in assembly.
    13  const (
    14  	offsetX86HasAVX    = unsafe.Offsetof(cpu.X86.HasAVX)
    15  	offsetX86HasAVX2   = unsafe.Offsetof(cpu.X86.HasAVX2)
    16  	offsetX86HasERMS   = unsafe.Offsetof(cpu.X86.HasERMS)
    17  	offsetX86HasRDTSCP = unsafe.Offsetof(cpu.X86.HasRDTSCP)
    18  
    19  	offsetARMHasIDIVA = unsafe.Offsetof(cpu.ARM.HasIDIVA)
    20  
    21  	offsetMIPS64XHasMSA = unsafe.Offsetof(cpu.MIPS64X.HasMSA)
    22  )
    23  
    24  var (
    25  	// Set in runtime.cpuinit.
    26  	// TODO: deprecate these; use internal/cpu directly.
    27  	x86HasPOPCNT bool
    28  	x86HasSSE41  bool
    29  	x86HasFMA    bool
    30  
    31  	armHasVFPv4 bool
    32  
    33  	arm64HasATOMICS bool
    34  )