Package sys

• import "runtime/internal/sys"
• Overview
• Index

Overview

package sys contains system- and configuration- and architecture-specific constants used by the runtime.

Index

• Constants
• func Bswap32(x uint32) uint32
• func Bswap64(x uint64) uint64
• func Ctz32(x uint32) uint32
• func Ctz64(x uint64) uint64
• type ArchFamilyType
• type Uintreg

Package files

arch.go arch_amd64.go intrinsics.go stubs.go sys.go zgoarch_amd64.go zgoos_linux.go

Constants

const (
        ArchFamily          = AMD64
        BigEndian           = 0
        CacheLineSize       = 64
        DefaultPhysPageSize = 4096
        PCQuantum           = 1
        Int64Align          = 8
        HugePageSize        = 1 << 21
        MinFrameSize        = 0
)

const GOARCH = `amd64`

const GOOS = `linux`

const Goarch386 = 0

const GoarchAmd64 = 1

const GoarchAmd64p32 = 0

const GoarchArm = 0

const GoarchArm64 = 0

const GoarchArm64be = 0

const GoarchArmbe = 0

const GoarchMips = 0

const GoarchMips64 = 0

const GoarchMips64le = 0

const GoarchMips64p32 = 0

const GoarchMips64p32le = 0

const GoarchMipsle = 0

const GoarchPpc = 0

const GoarchPpc64 = 0

const GoarchPpc64le = 0

const GoarchS390 = 0

const GoarchS390x = 0

const GoarchSparc = 0

const GoarchSparc64 = 0

const GoosAndroid = 0

const GoosDarwin = 0

const GoosDragonfly = 0

const GoosFreebsd = 0

const GoosLinux = 1

const GoosNacl = 0

const GoosNetbsd = 0

const GoosOpenbsd = 0

const GoosPlan9 = 0

const GoosSolaris = 0

const GoosWindows = 0

const PtrSize = 4 << (^uintptr(0) >> 63) // unsafe.Sizeof(uintptr(0)) but an ideal const

const RegSize = 4 << (^Uintreg(0) >> 63) // unsafe.Sizeof(uintreg(0)) but an ideal const

const SpAlign = 1*(1-GoarchArm64) + 16*GoarchArm64

func Bswap32Source

func Bswap32(x uint32) uint32

Bswap32 returns its input with byte order reversed 0x01020304 -> 0x04030201

func Bswap64Source

func Bswap64(x uint64) uint64

Bswap64 returns its input with byte order reversed 0x0102030405060708 -> 0x0807060504030201

func Ctz32Source

func Ctz32(x uint32) uint32

Ctz32 counts trailing (low-order) zeroes, and if all are zero, then 32.

func Ctz64Source

func Ctz64(x uint64) uint64

Ctz64 counts trailing (low-order) zeroes, and if all are zero, then 64.

type ArchFamilyTypeSource

type ArchFamilyType int

const (
        AMD64 ArchFamilyType = iota
        ARM
        ARM64
        I386
        MIPS
        MIPS64
        PPC64
        S390X
)

type UintregSource

type Uintreg uint64