| // 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 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") | |
| } |