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233 lines
5.5 KiB
233 lines
5.5 KiB
4 months ago
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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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// This file contains codegen tests related to bit field
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// insertion/extraction simplifications/optimizations.
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func extr1(x, x2 uint64) uint64 {
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return x<<7 + x2>>57 // arm64:"EXTR\t[$]57,"
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}
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func extr2(x, x2 uint64) uint64 {
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return x<<7 | x2>>57 // arm64:"EXTR\t[$]57,"
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}
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func extr3(x, x2 uint64) uint64 {
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return x<<7 ^ x2>>57 // arm64:"EXTR\t[$]57,"
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}
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func extr4(x, x2 uint32) uint32 {
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return x<<7 + x2>>25 // arm64:"EXTRW\t[$]25,"
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}
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func extr5(x, x2 uint32) uint32 {
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return x<<7 | x2>>25 // arm64:"EXTRW\t[$]25,"
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}
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func extr6(x, x2 uint32) uint32 {
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return x<<7 ^ x2>>25 // arm64:"EXTRW\t[$]25,"
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}
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// check 32-bit shift masking
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func mask32(x uint32) uint32 {
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return (x << 29) >> 29 // arm64:"AND\t[$]7, R[0-9]+",-"LSR",-"LSL"
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}
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// check 16-bit shift masking
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func mask16(x uint16) uint16 {
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return (x << 14) >> 14 // arm64:"AND\t[$]3, R[0-9]+",-"LSR",-"LSL"
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}
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// check 8-bit shift masking
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func mask8(x uint8) uint8 {
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return (x << 7) >> 7 // arm64:"AND\t[$]1, R[0-9]+",-"LSR",-"LSL"
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}
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func maskshift(x uint64) uint64 {
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// arm64:"AND\t[$]4095, R[0-9]+",-"LSL",-"LSR",-"UBFIZ",-"UBFX"
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return ((x << 5) & (0xfff << 5)) >> 5
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}
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// bitfield ops
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// bfi
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func bfi1(x, y uint64) uint64 {
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// arm64:"BFI\t[$]4, R[0-9]+, [$]12",-"LSL",-"LSR",-"AND"
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return ((x & 0xfff) << 4) | (y & 0xffffffffffff000f)
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}
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func bfi2(x, y uint64) uint64 {
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// arm64:"BFI\t[$]12, R[0-9]+, [$]40",-"LSL",-"LSR",-"AND"
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return (x << 24 >> 12) | (y & 0xfff0000000000fff)
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}
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// bfxil
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func bfxil1(x, y uint64) uint64 {
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// arm64:"BFXIL\t[$]5, R[0-9]+, [$]12",-"LSL",-"LSR",-"AND"
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return ((x >> 5) & 0xfff) | (y & 0xfffffffffffff000)
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}
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func bfxil2(x, y uint64) uint64 {
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// arm64:"BFXIL\t[$]12, R[0-9]+, [$]40",-"LSL",-"LSR",-"AND"
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return (x << 12 >> 24) | (y & 0xffffff0000000000)
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}
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// sbfiz
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func sbfiz1(x int64) int64 {
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// arm64:"SBFIZ\t[$]1, R[0-9]+, [$]60",-"LSL",-"ASR"
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return (x << 4) >> 3
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}
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func sbfiz2(x int32) int64 {
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return int64(x << 3) // arm64:"SBFIZ\t[$]3, R[0-9]+, [$]29",-"LSL"
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}
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func sbfiz3(x int16) int64 {
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return int64(x << 3) // arm64:"SBFIZ\t[$]3, R[0-9]+, [$]13",-"LSL"
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}
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func sbfiz4(x int8) int64 {
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return int64(x << 3) // arm64:"SBFIZ\t[$]3, R[0-9]+, [$]5",-"LSL"
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}
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func sbfiz5(x int32) int32 {
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// arm64:"SBFIZ\t[$]1, R[0-9]+, [$]28",-"LSL",-"ASR"
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return (x << 4) >> 3
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}
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// sbfx
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func sbfx1(x int64) int64 {
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return (x << 3) >> 4 // arm64:"SBFX\t[$]1, R[0-9]+, [$]60",-"LSL",-"ASR"
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}
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func sbfx2(x int64) int64 {
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return (x << 60) >> 60 // arm64:"SBFX\tZR, R[0-9]+, [$]4",-"LSL",-"ASR"
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}
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func sbfx3(x int32) int64 {
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return int64(x) >> 3 // arm64:"SBFX\t[$]3, R[0-9]+, [$]29",-"ASR"
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}
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func sbfx4(x int16) int64 {
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return int64(x) >> 3 // arm64:"SBFX\t[$]3, R[0-9]+, [$]13",-"ASR"
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}
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func sbfx5(x int8) int64 {
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return int64(x) >> 3 // arm64:"SBFX\t[$]3, R[0-9]+, [$]5",-"ASR"
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}
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func sbfx6(x int32) int32 {
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return (x << 3) >> 4 // arm64:"SBFX\t[$]1, R[0-9]+, [$]28",-"LSL",-"ASR"
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}
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// ubfiz
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func ubfiz1(x uint64) uint64 {
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// arm64:"UBFIZ\t[$]3, R[0-9]+, [$]12",-"LSL",-"AND"
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return (x & 0xfff) << 3
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}
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func ubfiz2(x uint64) uint64 {
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// arm64:"UBFIZ\t[$]4, R[0-9]+, [$]12",-"LSL",-"AND"
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return (x << 4) & 0xfff0
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}
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func ubfiz3(x uint32) uint64 {
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return uint64(x+1) << 3 // arm64:"UBFIZ\t[$]3, R[0-9]+, [$]32",-"LSL"
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}
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func ubfiz4(x uint16) uint64 {
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return uint64(x+1) << 3 // arm64:"UBFIZ\t[$]3, R[0-9]+, [$]16",-"LSL"
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}
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func ubfiz5(x uint8) uint64 {
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return uint64(x+1) << 3 // arm64:"UBFIZ\t[$]3, R[0-9]+, [$]8",-"LSL"
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}
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func ubfiz6(x uint64) uint64 {
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// arm64:"UBFIZ\t[$]1, R[0-9]+, [$]60",-"LSL",-"LSR"
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return (x << 4) >> 3
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}
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func ubfiz7(x uint32) uint32 {
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// arm64:"UBFIZ\t[$]1, R[0-9]+, [$]28",-"LSL",-"LSR"
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return (x << 4) >> 3
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}
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func ubfiz8(x uint64) uint64 {
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// arm64:"UBFIZ\t[$]1, R[0-9]+, [$]20",-"LSL",-"LSR"
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return ((x & 0xfffff) << 4) >> 3
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}
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func ubfiz9(x uint64) uint64 {
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// arm64:"UBFIZ\t[$]5, R[0-9]+, [$]13",-"LSL",-"LSR",-"AND"
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return ((x << 3) & 0xffff) << 2
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}
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func ubfiz10(x uint64) uint64 {
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// arm64:"UBFIZ\t[$]7, R[0-9]+, [$]12",-"LSL",-"LSR",-"AND"
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return ((x << 5) & (0xfff << 5)) << 2
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}
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// ubfx
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func ubfx1(x uint64) uint64 {
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// arm64:"UBFX\t[$]25, R[0-9]+, [$]10",-"LSR",-"AND"
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return (x >> 25) & 1023
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}
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func ubfx2(x uint64) uint64 {
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// arm64:"UBFX\t[$]4, R[0-9]+, [$]8",-"LSR",-"AND"
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return (x & 0x0ff0) >> 4
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}
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func ubfx3(x uint32) uint64 {
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return uint64(x >> 15) // arm64:"UBFX\t[$]15, R[0-9]+, [$]17",-"LSR"
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}
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func ubfx4(x uint16) uint64 {
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return uint64(x >> 9) // arm64:"UBFX\t[$]9, R[0-9]+, [$]7",-"LSR"
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}
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func ubfx5(x uint8) uint64 {
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return uint64(x >> 3) // arm64:"UBFX\t[$]3, R[0-9]+, [$]5",-"LSR"
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}
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func ubfx6(x uint64) uint64 {
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return (x << 1) >> 2 // arm64:"UBFX\t[$]1, R[0-9]+, [$]62",-"LSL",-"LSR"
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}
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func ubfx7(x uint32) uint32 {
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return (x << 1) >> 2 // arm64:"UBFX\t[$]1, R[0-9]+, [$]30",-"LSL",-"LSR"
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}
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func ubfx8(x uint64) uint64 {
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// arm64:"UBFX\t[$]1, R[0-9]+, [$]12",-"LSL",-"LSR",-"AND"
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return ((x << 1) >> 2) & 0xfff
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}
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func ubfx9(x uint64) uint64 {
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// arm64:"UBFX\t[$]4, R[0-9]+, [$]11",-"LSL",-"LSR",-"AND"
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return ((x >> 3) & 0xfff) >> 1
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}
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func ubfx10(x uint64) uint64 {
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// arm64:"UBFX\t[$]5, R[0-9]+, [$]56",-"LSL",-"LSR"
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return ((x >> 2) << 5) >> 8
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}
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func ubfx11(x uint64) uint64 {
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// arm64:"UBFX\t[$]1, R[0-9]+, [$]19",-"LSL",-"LSR"
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return ((x & 0xfffff) << 3) >> 4
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}
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// Check that we don't emit comparisons for constant shifts.
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//go:nosplit
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func shift_no_cmp(x int) int {
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// arm64:`LSL\t[$]17`,-`CMP`
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// mips64:`SLLV\t[$]17`,-`SGT`
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return x << 17
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}
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