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