sys

Documentation

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 Ctz16(x uint16) uint16
• func Ctz32(x uint32) uint32
• func Ctz64(x uint64) uint64
• func Ctz8(x uint8) uint8
• type ArchFamilyType
• type Uintreg

Constants

const (
	ArchFamily    = AMD64
	BigEndian     = 0
	CacheLineSize = 64
	PhysPageSize  = 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 // SP alignment: 1 normally, 16 for ARM64

Functions

func Bswap32

func Bswap32(x uint32) uint32

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

func Bswap64

func Bswap64(x uint64) uint64

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

func Ctz16

func Ctz16(x uint16) uint16

Ctz16 counts trailing (low-order) zeroes, and if all are zero, then 16.

func Ctz32

func Ctz32(x uint32) uint32

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

func Ctz64

func Ctz64(x uint64) uint64

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

func Ctz8

func Ctz8(x uint8) uint8

Ctz8 counts trailing (low-order) zeroes, and if all are zero, then 8.

Types

type ArchFamilyType

type ArchFamilyType int

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

type Uintreg

type Uintreg uint64