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-rw-r--r--test/codegen/shift.go436
1 files changed, 436 insertions, 0 deletions
diff --git a/test/codegen/shift.go b/test/codegen/shift.go
new file mode 100644
index 0000000..d34ff9b
--- /dev/null
+++ b/test/codegen/shift.go
@@ -0,0 +1,436 @@
+// 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 {
+ // ppc64x:"SLD"
+ // riscv64:"SLLI",-"AND",-"SLTIU"
+ return v << uint64(33)
+}
+
+func rshConst64Ux64(v uint64) uint64 {
+ // ppc64x:"SRD"
+ // riscv64:"SRLI",-"AND",-"SLTIU"
+ return v >> uint64(33)
+}
+
+func rshConst64x64(v int64) int64 {
+ // ppc64x:"SRAD"
+ // riscv64:"SRAI",-"OR",-"SLTIU"
+ return v >> uint64(33)
+}
+
+func lshConst32x64(v int32) int32 {
+ // ppc64x:"SLW"
+ // riscv64:"SLLI",-"AND",-"SLTIU", -"MOVW"
+ return v << uint64(29)
+}
+
+func rshConst32Ux64(v uint32) uint32 {
+ // ppc64x:"SRW"
+ // riscv64:"SRLI",-"AND",-"SLTIU", -"MOVW"
+ return v >> uint64(29)
+}
+
+func rshConst32x64(v int32) int32 {
+ // ppc64x:"SRAW"
+ // riscv64:"SRAI",-"OR",-"SLTIU", -"MOVW"
+ return v >> uint64(29)
+}
+
+func lshConst64x32(v int64) int64 {
+ // ppc64x:"SLD"
+ // riscv64:"SLLI",-"AND",-"SLTIU"
+ return v << uint32(33)
+}
+
+func rshConst64Ux32(v uint64) uint64 {
+ // ppc64x:"SRD"
+ // riscv64:"SRLI",-"AND",-"SLTIU"
+ return v >> uint32(33)
+}
+
+func rshConst64x32(v int64) int64 {
+ // ppc64x:"SRAD"
+ // riscv64:"SRAI",-"OR",-"SLTIU"
+ return v >> uint32(33)
+}
+
+// ------------------ //
+// masked shifts //
+// ------------------ //
+
+func lshMask64x64(v int64, s uint64) int64 {
+ // arm64:"LSL",-"AND"
+ // ppc64x:"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"
+ // ppc64x:"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"
+ // ppc64x:"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"
+ // ppc64x:"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"
+ // ppc64x:"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"
+ // ppc64x:"ISEL",-"ORN"
+ // riscv64:"SRA",-"OR",-"SLTIU"
+ // s390x:-"RISBGZ",-"AND",-"LOCGR"
+ return v >> (s & 63)
+}
+
+func lshMask64x32(v int64, s uint32) int64 {
+ // arm64:"LSL",-"AND"
+ // ppc64x:"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"
+ // ppc64x:"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"
+ // ppc64x:"ANDCC",-"ORN",-"ISEL"
+ // riscv64:"SRA",-"OR",-"SLTIU"
+ // s390x:-"RISBGZ",-"AND",-"LOCGR"
+ return v >> (s & 63)
+}
+
+func lshMask64x32Ext(v int64, s int32) int64 {
+ // ppc64x:"ANDCC",-"ORN",-"ISEL"
+ // riscv64:"SLL",-"AND\t",-"SLTIU"
+ // s390x:-"RISBGZ",-"AND",-"LOCGR"
+ return v << uint(s&63)
+}
+
+func rshMask64Ux32Ext(v uint64, s int32) uint64 {
+ // ppc64x:"ANDCC",-"ORN",-"ISEL"
+ // riscv64:"SRL",-"AND\t",-"SLTIU"
+ // s390x:-"RISBGZ",-"AND",-"LOCGR"
+ return v >> uint(s&63)
+}
+
+func rshMask64x32Ext(v int64, s int32) int64 {
+ // ppc64x:"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) {
+
+ // ppc64x:-".*RLWINM",-".*RLDICR",".*CLRLSLDI"
+ f := tab[byte(v)^b]
+ // ppc64x:-".*RLWINM",-".*RLDICR",".*CLRLSLDI"
+ f += tab[byte(v)&b]
+ // ppc64x:-".*RLWINM",-".*RLDICR",".*CLRLSLDI"
+ f += tab[byte(v)|b]
+ // ppc64x:-".*RLWINM",-".*RLDICR",".*CLRLSLDI"
+ f += tab[uint16(v)&h]
+ // ppc64x:-".*RLWINM",-".*RLDICR",".*CLRLSLDI"
+ f += tab[uint16(v)^h]
+ // ppc64x:-".*RLWINM",-".*RLDICR",".*CLRLSLDI"
+ f += tab[uint16(v)|h]
+ // ppc64x:-".*AND",-"RLDICR",".*CLRLSLDI"
+ f += tab[v&0xff]
+ // ppc64x:-".*AND",".*CLRLSLWI"
+ f += 2 * uint32(uint16(d))
+ // ppc64x:-".*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) {
+
+ // ppc64x:-"AND","CLRLSLWI"
+ f := (v8 & 0xF) << 2
+ // ppc64x:"CLRLSLWI"
+ f += byte(v16) << 3
+ // ppc64x:-"AND","CLRLSLWI"
+ g := (v16 & 0xFF) << 3
+ // ppc64x:-"AND","CLRLSLWI"
+ h := (v32 & 0xFFFFF) << 2
+ // ppc64x:"CLRLSLDI"
+ i := (v64 & 0xFFFFFFFF) << 5
+ // ppc64x:-"CLRLSLDI"
+ i += (v64 & 0xFFFFFFF) << 38
+ // ppc64x/power9:-"CLRLSLDI"
+ i += (v64 & 0xFFFF00) << 10
+ // ppc64x/power9:-"SLD","EXTSWSLI"
+ j := int64(x32+32) * 8
+ return f, g, h, i, j
+}
+
+func checkWidenAfterShift(v int64, u uint64) (int64, uint64) {
+
+ // ppc64x:-".*MOVW"
+ f := int32(v >> 32)
+ // ppc64x:".*MOVW"
+ f += int32(v >> 31)
+ // ppc64x:-".*MOVH"
+ g := int16(v >> 48)
+ // ppc64x:".*MOVH"
+ g += int16(v >> 30)
+ // ppc64x:-".*MOVH"
+ g += int16(f >> 16)
+ // ppc64x:-".*MOVB"
+ h := int8(v >> 56)
+ // ppc64x:".*MOVB"
+ h += int8(v >> 28)
+ // ppc64x:-".*MOVB"
+ h += int8(f >> 24)
+ // ppc64x:".*MOVB"
+ h += int8(f >> 16)
+ return int64(h), uint64(g)
+}
+
+func checkShiftAndMask32(v []uint32) {
+ i := 0
+
+ // ppc64x: "RLWNM\t[$]24, R[0-9]+, [$]12, [$]19, R[0-9]+"
+ v[i] = (v[i] & 0xFF00000) >> 8
+ i++
+ // ppc64x: "RLWNM\t[$]26, R[0-9]+, [$]22, [$]29, R[0-9]+"
+ v[i] = (v[i] & 0xFF00) >> 6
+ i++
+ // ppc64x: "MOVW\tR0"
+ v[i] = (v[i] & 0xFF) >> 8
+ i++
+ // ppc64x: "MOVW\tR0"
+ v[i] = (v[i] & 0xF000000) >> 28
+ i++
+ // ppc64x: "RLWNM\t[$]26, R[0-9]+, [$]24, [$]31, R[0-9]+"
+ v[i] = (v[i] >> 6) & 0xFF
+ i++
+ // ppc64x: "RLWNM\t[$]26, R[0-9]+, [$]12, [$]19, R[0-9]+"
+ v[i] = (v[i] >> 6) & 0xFF000
+ i++
+ // ppc64x: "MOVW\tR0"
+ v[i] = (v[i] >> 20) & 0xFF000
+ i++
+ // ppc64x: "MOVW\tR0"
+ v[i] = (v[i] >> 24) & 0xFF00
+ i++
+}
+
+func checkMergedShifts32(a [256]uint32, b [256]uint64, u uint32, v uint32) {
+ // ppc64x: -"CLRLSLDI", "RLWNM\t[$]10, R[0-9]+, [$]22, [$]29, R[0-9]+"
+ a[0] = a[uint8(v>>24)]
+ // ppc64x: -"CLRLSLDI", "RLWNM\t[$]11, R[0-9]+, [$]21, [$]28, R[0-9]+"
+ b[0] = b[uint8(v>>24)]
+ // ppc64x: -"CLRLSLDI", "RLWNM\t[$]15, R[0-9]+, [$]21, [$]28, R[0-9]+"
+ b[1] = b[(v>>20)&0xFF]
+ // ppc64x: -"SLD", "RLWNM\t[$]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
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 16:28:46 +0000