sys

package
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Published: Feb 2, 2017 License: BSD-3-Clause Imports: 0 Imported by: 0

Documentation

Overview

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

Index

Constants

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const (
	ArchFamily    = AMD64
	BigEndian     = 0
	CacheLineSize = 64
	PhysPageSize  = 4096
	PCQuantum     = 1
	Int64Align    = 8
	HugePageSize  = 1 << 21
	MinFrameSize  = 0
)
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const GOARCH = `amd64`
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const GOOS = `linux`
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const Goarch386 = 0
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const GoarchAmd64 = 1
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const GoarchAmd64p32 = 0
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const GoarchArm = 0
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const GoarchArm64 = 0
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const GoarchArm64be = 0
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const GoarchArmbe = 0
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const GoarchMips = 0
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const GoarchMips64 = 0
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const GoarchMips64le = 0
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const GoarchMips64p32 = 0
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const GoarchMips64p32le = 0
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const GoarchMipsle = 0
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const GoarchPpc = 0
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const GoarchPpc64 = 0
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const GoarchPpc64le = 0
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const GoarchS390 = 0
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const GoarchS390x = 0
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const GoarchSparc = 0
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const GoarchSparc64 = 0
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const GoosAndroid = 0
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const GoosDarwin = 0
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const GoosDragonfly = 0
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const GoosFreebsd = 0
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const GoosLinux = 1
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const GoosNacl = 0
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const GoosNetbsd = 0
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const GoosOpenbsd = 0
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const GoosPlan9 = 0
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const GoosSolaris = 0
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const GoosWindows = 0
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const PtrSize = 4 << (^uintptr(0) >> 63) // unsafe.Sizeof(uintptr(0)) but an ideal const
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const RegSize = 4 << (^Uintreg(0) >> 63) // unsafe.Sizeof(uintreg(0)) but an ideal const
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const SpAlign = 1*(1-GoarchArm64) + 16*GoarchArm64 // SP alignment: 1 normally, 16 for ARM64

Variables

This section is empty.

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

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