cpuflags.go

     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  	offsetX86HasAVX512 = unsafe.Offsetof(cpu.X86.HasAVX512) // F+CD+BW+DQ+VL
    17  	offsetX86HasERMS   = unsafe.Offsetof(cpu.X86.HasERMS)
    18  	offsetX86HasRDTSCP = unsafe.Offsetof(cpu.X86.HasRDTSCP)
    19  
    20  	offsetARMHasIDIVA = unsafe.Offsetof(cpu.ARM.HasIDIVA)
    21  
    22  	offsetMIPS64XHasMSA = unsafe.Offsetof(cpu.MIPS64X.HasMSA)
    23  
    24  	offsetLOONG64HasLSX  = unsafe.Offsetof(cpu.Loong64.HasLSX)
    25  	offsetLOONG64HasLASX = unsafe.Offsetof(cpu.Loong64.HasLASX)
    26  	offsetARM64HasSVE    = unsafe.Offsetof(cpu.ARM64.HasSVE)
    27  )
    28  
    29  var (
    30  	// Set in runtime.cpuinit.
    31  	// TODO: deprecate these; use internal/cpu directly.
    32  	x86HasAVX    bool
    33  	x86HasFMA    bool
    34  	x86HasPOPCNT bool
    35  	x86HasSSE41  bool
    36  
    37  	armHasVFPv4 bool
    38  
    39  	arm64HasATOMICS bool
    40  
    41  	loong64HasLAMCAS     bool
    42  	loong64HasLAM_BH     bool
    43  	loong64HasDBAR_HINTS bool
    44  	loong64HasLSX        bool
    45  
    46  	riscv64HasZbb bool
    47  )
    48
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