| // 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 | |
| // ------------------ // | |
| // constant shifts // | |
| // ------------------ // | |
| func lshConst64x64(v int64) int64 { | |
| // ppc64:"SLD" | |
| // ppc64le:"SLD" | |
| // riscv64:"SLLI",-"AND",-"SLTIU" | |
| return v << uint64(33) | |
| } | |
| func rshConst64Ux64(v uint64) uint64 { | |
| // ppc64:"SRD" | |
| // ppc64le:"SRD" | |
| // riscv64:"SRLI",-"AND",-"SLTIU" | |
| return v >> uint64(33) | |
| } | |
| func rshConst64x64(v int64) int64 { | |
| // ppc64:"SRAD" | |
| // ppc64le:"SRAD" | |
| // riscv64:"SRAI",-"OR",-"SLTIU" | |
| return v >> uint64(33) | |
| } | |
| func lshConst32x64(v int32) int32 { | |
| // ppc64:"SLW" | |
| // ppc64le:"SLW" | |
| // riscv64:"SLLI",-"AND",-"SLTIU", -"MOVW" | |
| return v << uint64(29) | |
| } | |
| func rshConst32Ux64(v uint32) uint32 { | |
| // ppc64:"SRW" | |
| // ppc64le:"SRW" | |
| // riscv64:"SRLI",-"AND",-"SLTIU", -"MOVW" | |
| return v >> uint64(29) | |
| } | |
| func rshConst32x64(v int32) int32 { | |
| // ppc64:"SRAW" | |
| // ppc64le:"SRAW" | |
| // riscv64:"SRAI",-"OR",-"SLTIU", -"MOVW" | |
| return v >> uint64(29) | |
| } | |
| func lshConst64x32(v int64) int64 { | |
| // ppc64:"SLD" | |
| // ppc64le:"SLD" | |
| // riscv64:"SLLI",-"AND",-"SLTIU" | |
| return v << uint32(33) | |
| } | |
| func rshConst64Ux32(v uint64) uint64 { | |
| // ppc64:"SRD" | |
| // ppc64le:"SRD" | |
| // riscv64:"SRLI",-"AND",-"SLTIU" | |
| return v >> uint32(33) | |
| } | |
| func rshConst64x32(v int64) int64 { | |
| // ppc64:"SRAD" | |
| // ppc64le:"SRAD" | |
| // riscv64:"SRAI",-"OR",-"SLTIU" | |
| return v >> uint32(33) | |
| } | |
| // ------------------ // | |
| // masked shifts // | |
| // ------------------ // | |
| func lshMask64x64(v int64, s uint64) int64 { | |
| // arm64:"LSL",-"AND" | |
| // ppc64:"ANDCC",-"ORN",-"ISEL" | |
| // ppc64le:"ANDCC",-"ORN",-"ISEL" | |
| // riscv64:"SLL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v << (s & 63) | |
| } | |
| func rshMask64Ux64(v uint64, s uint64) uint64 { | |
| // arm64:"LSR",-"AND",-"CSEL" | |
| // ppc64:"ANDCC",-"ORN",-"ISEL" | |
| // ppc64le:"ANDCC",-"ORN",-"ISEL" | |
| // riscv64:"SRL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v >> (s & 63) | |
| } | |
| func rshMask64x64(v int64, s uint64) int64 { | |
| // arm64:"ASR",-"AND",-"CSEL" | |
| // ppc64:"ANDCC",-"ORN",-"ISEL" | |
| // ppc64le:"ANDCC",-ORN",-"ISEL" | |
| // riscv64:"SRA",-"OR",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v >> (s & 63) | |
| } | |
| func lshMask32x64(v int32, s uint64) int32 { | |
| // arm64:"LSL",-"AND" | |
| // ppc64:"ISEL",-"ORN" | |
| // ppc64le:"ISEL",-"ORN" | |
| // riscv64:"SLL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v << (s & 63) | |
| } | |
| func rshMask32Ux64(v uint32, s uint64) uint32 { | |
| // arm64:"LSR",-"AND" | |
| // ppc64:"ISEL",-"ORN" | |
| // ppc64le:"ISEL",-"ORN" | |
| // riscv64:"SRL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v >> (s & 63) | |
| } | |
| func rshMask32x64(v int32, s uint64) int32 { | |
| // arm64:"ASR",-"AND" | |
| // ppc64:"ISEL",-"ORN" | |
| // ppc64le:"ISEL",-"ORN" | |
| // riscv64:"SRA",-"OR",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v >> (s & 63) | |
| } | |
| func lshMask64x32(v int64, s uint32) int64 { | |
| // arm64:"LSL",-"AND" | |
| // ppc64:"ANDCC",-"ORN" | |
| // ppc64le:"ANDCC",-"ORN" | |
| // riscv64:"SLL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v << (s & 63) | |
| } | |
| func rshMask64Ux32(v uint64, s uint32) uint64 { | |
| // arm64:"LSR",-"AND",-"CSEL" | |
| // ppc64:"ANDCC",-"ORN" | |
| // ppc64le:"ANDCC",-"ORN" | |
| // riscv64:"SRL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v >> (s & 63) | |
| } | |
| func rshMask64x32(v int64, s uint32) int64 { | |
| // arm64:"ASR",-"AND",-"CSEL" | |
| // ppc64:"ANDCC",-"ORN",-"ISEL" | |
| // ppc64le:"ANDCC",-"ORN",-"ISEL" | |
| // riscv64:"SRA",-"OR",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v >> (s & 63) | |
| } | |
| func lshMask64x32Ext(v int64, s int32) int64 { | |
| // ppc64:"ANDCC",-"ORN",-"ISEL" | |
| // ppc64le:"ANDCC",-"ORN",-"ISEL" | |
| // riscv64:"SLL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v << uint(s&63) | |
| } | |
| func rshMask64Ux32Ext(v uint64, s int32) uint64 { | |
| // ppc64:"ANDCC",-"ORN",-"ISEL" | |
| // ppc64le:"ANDCC",-"ORN",-"ISEL" | |
| // riscv64:"SRL",-"AND\t",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| return v >> uint(s&63) | |
| } | |
| func rshMask64x32Ext(v int64, s int32) int64 { | |
| // ppc64:"ANDCC",-"ORN",-"ISEL" | |
| // ppc64le:"ANDCC",-"ORN",-"ISEL" | |
| // riscv64:"SRA",-"OR",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| 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 { | |
| // riscv64:"SLL",-"AND",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| // wasm:-"Select",-".*LtU" | |
| // arm64:"LSL",-"CSEL" | |
| return v << s | |
| } | |
| panic("shift too large") | |
| } | |
| func rshGuarded64U(v uint64, s uint) uint64 { | |
| if s < 64 { | |
| // riscv64:"SRL",-"AND",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| // wasm:-"Select",-".*LtU" | |
| // arm64:"LSR",-"CSEL" | |
| return v >> s | |
| } | |
| panic("shift too large") | |
| } | |
| func rshGuarded64(v int64, s uint) int64 { | |
| if s < 64 { | |
| // riscv64:"SRA",-"OR",-"SLTIU" | |
| // s390x:-"RISBGZ",-"AND",-"LOCGR" | |
| // wasm:-"Select",-".*LtU" | |
| // arm64:"ASR",-"CSEL" | |
| return v >> s | |
| } | |
| panic("shift too large") | |
| } | |
| func provedUnsignedShiftLeft(val64 uint64, val32 uint32, val16 uint16, val8 uint8, shift int) (r1 uint64, r2 uint32, r3 uint16, r4 uint8) { | |
| if shift >= 0 && shift < 64 { | |
| // arm64:"LSL",-"CSEL" | |
| r1 = val64 << shift | |
| } | |
| if shift >= 0 && shift < 32 { | |
| // arm64:"LSL",-"CSEL" | |
| r2 = val32 << shift | |
| } | |
| if shift >= 0 && shift < 16 { | |
| // arm64:"LSL",-"CSEL" | |
| r3 = val16 << shift | |
| } | |
| if shift >= 0 && shift < 8 { | |
| // arm64:"LSL",-"CSEL" | |
| r4 = val8 << shift | |
| } | |
| return r1, r2, r3, r4 | |
| } | |
| func provedSignedShiftLeft(val64 int64, val32 int32, val16 int16, val8 int8, shift int) (r1 int64, r2 int32, r3 int16, r4 int8) { | |
| if shift >= 0 && shift < 64 { | |
| // arm64:"LSL",-"CSEL" | |
| r1 = val64 << shift | |
| } | |
| if shift >= 0 && shift < 32 { | |
| // arm64:"LSL",-"CSEL" | |
| r2 = val32 << shift | |
| } | |
| if shift >= 0 && shift < 16 { | |
| // arm64:"LSL",-"CSEL" | |
| r3 = val16 << shift | |
| } | |
| if shift >= 0 && shift < 8 { | |
| // arm64:"LSL",-"CSEL" | |
| r4 = val8 << shift | |
| } | |
| return r1, r2, r3, r4 | |
| } | |
| func provedUnsignedShiftRight(val64 uint64, val32 uint32, val16 uint16, val8 uint8, shift int) (r1 uint64, r2 uint32, r3 uint16, r4 uint8) { | |
| if shift >= 0 && shift < 64 { | |
| // arm64:"LSR",-"CSEL" | |
| r1 = val64 >> shift | |
| } | |
| if shift >= 0 && shift < 32 { | |
| // arm64:"LSR",-"CSEL" | |
| r2 = val32 >> shift | |
| } | |
| if shift >= 0 && shift < 16 { | |
| // arm64:"LSR",-"CSEL" | |
| r3 = val16 >> shift | |
| } | |
| if shift >= 0 && shift < 8 { | |
| // arm64:"LSR",-"CSEL" | |
| r4 = val8 >> shift | |
| } | |
| return r1, r2, r3, r4 | |
| } | |
| func provedSignedShiftRight(val64 int64, val32 int32, val16 int16, val8 int8, shift int) (r1 int64, r2 int32, r3 int16, r4 int8) { | |
| if shift >= 0 && shift < 64 { | |
| // arm64:"ASR",-"CSEL" | |
| r1 = val64 >> shift | |
| } | |
| if shift >= 0 && shift < 32 { | |
| // arm64:"ASR",-"CSEL" | |
| r2 = val32 >> shift | |
| } | |
| if shift >= 0 && shift < 16 { | |
| // arm64:"ASR",-"CSEL" | |
| r3 = val16 >> shift | |
| } | |
| if shift >= 0 && shift < 8 { | |
| // arm64:"ASR",-"CSEL" | |
| r4 = val8 >> shift | |
| } | |
| return r1, r2, r3, r4 | |
| } | |
| func checkUnneededTrunc(tab *[100000]uint32, d uint64, v uint32, h uint16, b byte) (uint32, uint64) { | |
| // ppc64le:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| f := tab[byte(v)^b] | |
| // ppc64le:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| f += tab[byte(v)&b] | |
| // ppc64le:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| f += tab[byte(v)|b] | |
| // ppc64le:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| f += tab[uint16(v)&h] | |
| // ppc64le:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| f += tab[uint16(v)^h] | |
| // ppc64le:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*RLWINM",-".*RLDICR",".*CLRLSLDI" | |
| f += tab[uint16(v)|h] | |
| // ppc64le:-".*AND",-"RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*AND",-"RLDICR",".*CLRLSLDI" | |
| f += tab[v&0xff] | |
| // ppc64le:-".*AND",".*CLRLSLWI" | |
| // ppc64:-".*AND",".*CLRLSLWI" | |
| f += 2 * uint32(uint16(d)) | |
| // ppc64le:-".*AND",-"RLDICR",".*CLRLSLDI" | |
| // ppc64:-".*AND",-"RLDICR",".*CLRLSLDI" | |
| g := 2 * uint64(uint32(d)) | |
| return f, g | |
| } | |
| func checkCombinedShifts(v8 uint8, v16 uint16, v32 uint32, x32 int32, v64 uint64) (uint8, uint16, uint32, uint64, int64) { | |
| // ppc64le:-"AND","CLRLSLWI" | |
| // ppc64:-"AND","CLRLSLWI" | |
| f := (v8 & 0xF) << 2 | |
| // ppc64le:"CLRLSLWI" | |
| // ppc64:"CLRLSLWI" | |
| f += byte(v16) << 3 | |
| // ppc64le:-"AND","CLRLSLWI" | |
| // ppc64:-"AND","CLRLSLWI" | |
| g := (v16 & 0xFF) << 3 | |
| // ppc64le:-"AND","CLRLSLWI" | |
| // ppc64:-"AND","CLRLSLWI" | |
| h := (v32 & 0xFFFFF) << 2 | |
| // ppc64le:"CLRLSLDI" | |
| // ppc64:"CLRLSLDI" | |
| i := (v64 & 0xFFFFFFFF) << 5 | |
| // ppc64le:-"CLRLSLDI" | |
| // ppc64:-"CLRLSLDI" | |
| i += (v64 & 0xFFFFFFF) << 38 | |
| // ppc64le/power9:-"CLRLSLDI" | |
| // ppc64/power9:-"CLRLSLDI" | |
| i += (v64 & 0xFFFF00) << 10 | |
| // ppc64le/power9:-"SLD","EXTSWSLI" | |
| // ppc64/power9:-"SLD","EXTSWSLI" | |
| j := int64(x32+32) * 8 | |
| return f, g, h, i, j | |
| } | |
| func checkWidenAfterShift(v int64, u uint64) (int64, uint64) { | |
| // ppc64le:-".*MOVW" | |
| f := int32(v >> 32) | |
| // ppc64le:".*MOVW" | |
| f += int32(v >> 31) | |
| // ppc64le:-".*MOVH" | |
| g := int16(v >> 48) | |
| // ppc64le:".*MOVH" | |
| g += int16(v >> 30) | |
| // ppc64le:-".*MOVH" | |
| g += int16(f >> 16) | |
| // ppc64le:-".*MOVB" | |
| h := int8(v >> 56) | |
| // ppc64le:".*MOVB" | |
| h += int8(v >> 28) | |
| // ppc64le:-".*MOVB" | |
| h += int8(f >> 24) | |
| // ppc64le:".*MOVB" | |
| h += int8(f >> 16) | |
| return int64(h), uint64(g) | |
| } | |
| func checkShiftAndMask32(v []uint32) { | |
| i := 0 | |
| // ppc64le: "RLWNM\t[$]24, R[0-9]+, [$]12, [$]19, R[0-9]+" | |
| // ppc64: "RLWNM\t[$]24, R[0-9]+, [$]12, [$]19, R[0-9]+" | |
| v[i] = (v[i] & 0xFF00000) >> 8 | |
| i++ | |
| // ppc64le: "RLWNM\t[$]26, R[0-9]+, [$]22, [$]29, R[0-9]+" | |
| // ppc64: "RLWNM\t[$]26, R[0-9]+, [$]22, [$]29, R[0-9]+" | |
| v[i] = (v[i] & 0xFF00) >> 6 | |
| i++ | |
| // ppc64le: "MOVW\tR0" | |
| // ppc64: "MOVW\tR0" | |
| v[i] = (v[i] & 0xFF) >> 8 | |
| i++ | |
| // ppc64le: "MOVW\tR0" | |
| // ppc64: "MOVW\tR0" | |
| v[i] = (v[i] & 0xF000000) >> 28 | |
| i++ | |
| // ppc64le: "RLWNM\t[$]26, R[0-9]+, [$]24, [$]31, R[0-9]+" | |
| // ppc64: "RLWNM\t[$]26, R[0-9]+, [$]24, [$]31, R[0-9]+" | |
| v[i] = (v[i] >> 6) & 0xFF | |
| i++ | |
| // ppc64le: "RLWNM\t[$]26, R[0-9]+, [$]12, [$]19, R[0-9]+" | |
| // ppc64: "RLWNM\t[$]26, R[0-9]+, [$]12, [$]19, R[0-9]+" | |
| v[i] = (v[i] >> 6) & 0xFF000 | |
| i++ | |
| // ppc64le: "MOVW\tR0" | |
| // ppc64: "MOVW\tR0" | |
| v[i] = (v[i] >> 20) & 0xFF000 | |
| i++ | |
| // ppc64le: "MOVW\tR0" | |
| // ppc64: "MOVW\tR0" | |
| v[i] = (v[i] >> 24) & 0xFF00 | |
| i++ | |
| } | |
| func checkMergedShifts32(a [256]uint32, b [256]uint64, u uint32, v uint32) { | |
| // ppc64le: -"CLRLSLDI", "RLWNM\t[$]10, R[0-9]+, [$]22, [$]29, R[0-9]+" | |
| // ppc64: -"CLRLSLDI", "RLWNM\t[$]10, R[0-9]+, [$]22, [$]29, R[0-9]+" | |
| a[0] = a[uint8(v>>24)] | |
| // ppc64le: -"CLRLSLDI", "RLWNM\t[$]11, R[0-9]+, [$]21, [$]28, R[0-9]+" | |
| // ppc64: -"CLRLSLDI", "RLWNM\t[$]11, R[0-9]+, [$]21, [$]28, R[0-9]+" | |
| b[0] = b[uint8(v>>24)] | |
| // ppc64le: -"CLRLSLDI", "RLWNM\t[$]15, R[0-9]+, [$]21, [$]28, R[0-9]+" | |
| // ppc64: -"CLRLSLDI", "RLWNM\t[$]15, R[0-9]+, [$]21, [$]28, R[0-9]+" | |
| b[1] = b[(v>>20)&0xFF] | |
| // ppc64le: -"SLD", "RLWNM\t[$]10, R[0-9]+, [$]22, [$]28, R[0-9]+" | |
| // ppc64: -"SLD", "RLWNM\t[$]10, R[0-9]+, [$]22, [$]28, R[0-9]+" | |
| b[2] = b[v>>25] | |
| } | |
| // 128 bit shifts | |
| func check128bitShifts(x, y uint64, bits uint) (uint64, uint64) { | |
| s := bits & 63 | |
| ŝ := (64 - bits) & 63 | |
| // check that the shift operation has two commas (three operands) | |
| // amd64:"SHRQ.*,.*," | |
| shr := x>>s | y<<ŝ | |
| // amd64:"SHLQ.*,.*," | |
| shl := x<<s | y>>ŝ | |
| return shr, shl | |
| } | |
| func checkShiftToMask(u []uint64, s []int64) { | |
| // amd64:-"SHR",-"SHL","ANDQ" | |
| u[0] = u[0] >> 5 << 5 | |
| // amd64:-"SAR",-"SHL","ANDQ" | |
| s[0] = s[0] >> 5 << 5 | |
| // amd64:-"SHR",-"SHL","ANDQ" | |
| u[1] = u[1] << 5 >> 5 | |
| } |