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)
}

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

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

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

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