Gecko [ 167.86.127.34 ]

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 : shift.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

// ------------------ //
//   masked shifts    //
// ------------------ //

func lshMask64x64(v int64, s uint64) int64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v << (s & 63)
}

func rshMask64Ux64(v uint64, s uint64) uint64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> (s & 63)
}

func rshMask64x64(v int64, s uint64) int64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> (s & 63)
}

func lshMask32x64(v int32, s uint64) int32 {
	// s390x:-".*AND",-".*MOVDGE"
	return v << (s & 63)
}

func rshMask32Ux64(v uint32, s uint64) uint32 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> (s & 63)
}

func rshMask32x64(v int32, s uint64) int32 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> (s & 63)
}

func lshMask64x32(v int64, s uint32) int64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v << (s & 63)
}

func rshMask64Ux32(v uint64, s uint32) uint64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> (s & 63)
}

func rshMask64x32(v int64, s uint32) int64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> (s & 63)
}

func lshMask64x32Ext(v int64, s int32) int64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v << uint(s&63)
}

func rshMask64Ux32Ext(v uint64, s int32) uint64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> uint(s&63)
}

func rshMask64x32Ext(v int64, s int32) int64 {
	// s390x:-".*AND",-".*MOVDGE"
	return v >> uint(s&63)
}

// --------------- //
//  signed shifts  //
// --------------- //

// We do want to generate a test + panicshift for these cases.
func lshSigned(v8 int8, v16 int16, v32 int32, v64 int64, x int) {
	// amd64:"TESTB"
	_ = x << v8
	// amd64:"TESTW"
	_ = x << v16
	// amd64:"TESTL"
	_ = x << v32
	// amd64:"TESTQ"
	_ = x << v64
}

// We want to avoid generating a test + panicshift for these cases.
func lshSignedMasked(v8 int8, v16 int16, v32 int32, v64 int64, x int) {
	// amd64:-"TESTB"
	_ = x << (v8 & 7)
	// amd64:-"TESTW"
	_ = x << (v16 & 15)
	// amd64:-"TESTL"
	_ = x << (v32 & 31)
	// amd64:-"TESTQ"
	_ = x << (v64 & 63)
}

// ------------------ //
//   bounded shifts   //
// ------------------ //

func rshGuarded64(v int64, s uint) int64 {
	if s < 64 {
		// s390x:-".*AND",-".*MOVDGE" wasm:-"Select",-".*LtU"
		return v >> s
	}
	panic("shift too large")
}

func rshGuarded64U(v uint64, s uint) uint64 {
	if s < 64 {
		// s390x:-".*AND",-".*MOVDGE" wasm:-"Select",-".*LtU"
		return v >> s
	}
	panic("shift too large")
}

func lshGuarded64(v int64, s uint) int64 {
	if s < 64 {
		// s390x:-".*AND",-".*MOVDGE" wasm:-"Select",-".*LtU"
		return v << s
	}
	panic("shift too large")
}

${this.title}

Code Editor : shift.go