mirror of
https://github.com/golang/go
synced 2024-11-06 22:36:15 -07:00
100 lines
1.9 KiB
Go
100 lines
1.9 KiB
Go
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// asmcheck
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package codegen
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// ------------------ //
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// masked shifts //
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// ------------------ //
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func lshMask64x64(v int64, s uint64) int64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v << (s&63)
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}
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func rshMask64Ux64(v uint64, s uint64) uint64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> (s&63)
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}
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func rshMask64x64(v int64, s uint64) int64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> (s&63)
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}
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func lshMask32x64(v int32, s uint64) int32 {
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// s390x:-".*AND",-".*MOVDGE"
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return v << (s&63)
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}
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func rshMask32Ux64(v uint32, s uint64) uint32 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> (s&63)
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}
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func rshMask32x64(v int32, s uint64) int32 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> (s&63)
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}
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func lshMask64x32(v int64, s uint32) int64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v << (s&63)
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}
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func rshMask64Ux32(v uint64, s uint32) uint64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> (s&63)
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}
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func rshMask64x32(v int64, s uint32) int64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> (s&63)
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}
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func lshMask64x32Ext(v int64, s int32) int64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v << uint(s&63)
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}
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func rshMask64Ux32Ext(v uint64, s int32) uint64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> uint(s&63)
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}
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func rshMask64x32Ext(v int64, s int32) int64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> uint(s&63)
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}
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// ------------------ //
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// bounded shifts //
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// ------------------ //
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func lshGuarded64(v int64, s uint) int64 {
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if s < 64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> s
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}
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panic("shift too large")
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}
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func rshGuarded64U(v uint64, s uint) uint64 {
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if s < 64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v >> s
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}
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panic("shift too large")
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}
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func rshGuarded64(v int64, s uint) int64 {
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if s < 64 {
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// s390x:-".*AND",-".*MOVDGE"
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return v << s
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}
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panic("shift too large")
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}
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