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Name	Size	Permission
README	5.15 KB	-rw-r--r--
alloc.go	902 B	-rw-r--r--
arithmetic.go	10.67 KB	-rw-r--r--
bitfield.go	5.54 KB	-rw-r--r--
bits.go	5.18 KB	-rw-r--r--
compare_and_branch.go	2.81 KB	-rw-r--r--
comparisons.go	5.04 KB	-rw-r--r--
condmove.go	3.14 KB	-rw-r--r--
copy.go	1.72 KB	-rw-r--r--
floats.go	3.06 KB	-rw-r--r--
issue22703.go	5.43 KB	-rw-r--r--
issue25378.go	433 B	-rw-r--r--
issue31618.go	504 B	-rw-r--r--
issue33580.go	459 B	-rw-r--r--
mapaccess.go	9.21 KB	-rw-r--r--
maps.go	2.77 KB	-rw-r--r--
math.go	4.54 KB	-rw-r--r--
mathbits.go	12.75 KB	-rw-r--r--
memcombine.go	22.58 KB	-rw-r--r--
memops.go	1.43 KB	-rw-r--r--
noextend.go	5.57 KB	-rw-r--r--
race.go	581 B	-rw-r--r--
rotate.go	2.51 KB	-rw-r--r--
shift.go	2.62 KB	-rw-r--r--
slices.go	3.36 KB	-rw-r--r--
stack.go	2.96 KB	-rw-r--r--
strings.go	2.03 KB	-rw-r--r--
structs.go	905 B	-rw-r--r--
switch.go	409 B	-rw-r--r--
zerosize.go	537 B	-rw-r--r--

Code Editor : rotate.go

// asmcheck

// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package codegen

// ------------------- //
//    const rotates    //
// ------------------- //

func rot64(x uint64) uint64 {
	var a uint64

// amd64:"ROLQ\t[$]7"
	// arm64:"ROR\t[$]57"
	// s390x:"RLLG\t[$]7"
	// ppc64:"ROTL\t[$]7"
	// ppc64le:"ROTL\t[$]7"
	a += x<<7 | x>>57

// amd64:"ROLQ\t[$]8"
	// arm64:"ROR\t[$]56"
	// s390x:"RLLG\t[$]8"
	// ppc64:"ROTL\t[$]8"
	// ppc64le:"ROTL\t[$]8"
	a += x<<8 + x>>56

// amd64:"ROLQ\t[$]9"
	// arm64:"ROR\t[$]55"
	// s390x:"RLLG\t[$]9"
	// ppc64:"ROTL\t[$]9"
	// ppc64le:"ROTL\t[$]9"
	a += x<<9 ^ x>>55

return a
}

func rot32(x uint32) uint32 {
	var a uint32

// amd64:"ROLL\t[$]7"
	// arm:"MOVW\tR\\d+@>25"
	// arm64:"RORW\t[$]25"
	// s390x:"RLL\t[$]7"
	// ppc64:"ROTLW\t[$]7"
	// ppc64le:"ROTLW\t[$]7"
	a += x<<7 | x>>25

// amd64:`ROLL\t[$]8`
	// arm:"MOVW\tR\\d+@>24"
	// arm64:"RORW\t[$]24"
	// s390x:"RLL\t[$]8"
	// ppc64:"ROTLW\t[$]8"
	// ppc64le:"ROTLW\t[$]8"
	a += x<<8 + x>>24

// amd64:"ROLL\t[$]9"
	// arm:"MOVW\tR\\d+@>23"
	// arm64:"RORW\t[$]23"
	// s390x:"RLL\t[$]9"
	// ppc64:"ROTLW\t[$]9"
	// ppc64le:"ROTLW\t[$]9"
	a += x<<9 ^ x>>23

return a
}

func rot16(x uint16) uint16 {
	var a uint16

// amd64:"ROLW\t[$]7"
	a += x<<7 | x>>9

// amd64:`ROLW\t[$]8`
	a += x<<8 + x>>8

// amd64:"ROLW\t[$]9"
	a += x<<9 ^ x>>7

return a
}

func rot8(x uint8) uint8 {
	var a uint8

// amd64:"ROLB\t[$]5"
	a += x<<5 | x>>3

// amd64:`ROLB\t[$]6`
	a += x<<6 + x>>2

// amd64:"ROLB\t[$]7"
	a += x<<7 ^ x>>1

return a
}

// ----------------------- //
//    non-const rotates    //
// ----------------------- //

func rot64nc(x uint64, z uint) uint64 {
	var a uint64

z &= 63

// amd64:"ROLQ"
	// ppc64:"ROTL"
	// ppc64le:"ROTL"
	a += x<<z | x>>(64-z)

// amd64:"RORQ"
	a += x>>z | x<<(64-z)

return a
}

func rot32nc(x uint32, z uint) uint32 {
	var a uint32

z &= 31

// amd64:"ROLL"
	// ppc64:"ROTLW"
	// ppc64le:"ROTLW"
	a += x<<z | x>>(32-z)

// amd64:"RORL"
	a += x>>z | x<<(32-z)

return a
}

func rot16nc(x uint16, z uint) uint16 {
	var a uint16

z &= 15

// amd64:"ROLW"
	a += x<<z | x>>(16-z)

// amd64:"RORW"
	a += x>>z | x<<(16-z)

return a
}

func rot8nc(x uint8, z uint) uint8 {
	var a uint8

z &= 7

// amd64:"ROLB"
	a += x<<z | x>>(8-z)

// amd64:"RORB"
	a += x>>z | x<<(8-z)

return a
}

// Issue 18254: rotate after inlining
func f32(x uint32) uint32 {
	// amd64:"ROLL\t[$]7"
	return rot32nc(x, 7)
}

${this.title}

Code Editor : rotate.go