cpuflags.go

Documentation: runtime

		 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  	offsetX86HasSSE2 = unsafe.Offsetof(cpu.X86.HasSSE2)
		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  )
		35
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