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169 lines
2.5 KiB
169 lines
2.5 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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// ------------------- //
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// const rotates //
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// ------------------- //
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func rot64(x uint64) uint64 {
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var a uint64
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// amd64:"ROLQ\t[$]7"
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// arm64:"ROR\t[$]57"
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// s390x:"RLLG\t[$]7"
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// ppc64:"ROTL\t[$]7"
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// ppc64le:"ROTL\t[$]7"
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a += x<<7 | x>>57
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// amd64:"ROLQ\t[$]8"
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// arm64:"ROR\t[$]56"
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// s390x:"RLLG\t[$]8"
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// ppc64:"ROTL\t[$]8"
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// ppc64le:"ROTL\t[$]8"
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a += x<<8 + x>>56
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// amd64:"ROLQ\t[$]9"
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// arm64:"ROR\t[$]55"
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// s390x:"RLLG\t[$]9"
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// ppc64:"ROTL\t[$]9"
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// ppc64le:"ROTL\t[$]9"
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a += x<<9 ^ x>>55
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return a
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}
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func rot32(x uint32) uint32 {
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var a uint32
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// amd64:"ROLL\t[$]7"
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// arm:"MOVW\tR\\d+@>25"
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// arm64:"RORW\t[$]25"
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// s390x:"RLL\t[$]7"
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// ppc64:"ROTLW\t[$]7"
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// ppc64le:"ROTLW\t[$]7"
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a += x<<7 | x>>25
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// amd64:`ROLL\t[$]8`
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// arm:"MOVW\tR\\d+@>24"
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// arm64:"RORW\t[$]24"
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// s390x:"RLL\t[$]8"
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// ppc64:"ROTLW\t[$]8"
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// ppc64le:"ROTLW\t[$]8"
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a += x<<8 + x>>24
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// amd64:"ROLL\t[$]9"
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// arm:"MOVW\tR\\d+@>23"
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// arm64:"RORW\t[$]23"
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// s390x:"RLL\t[$]9"
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// ppc64:"ROTLW\t[$]9"
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// ppc64le:"ROTLW\t[$]9"
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a += x<<9 ^ x>>23
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return a
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}
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func rot16(x uint16) uint16 {
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var a uint16
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// amd64:"ROLW\t[$]7"
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a += x<<7 | x>>9
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// amd64:`ROLW\t[$]8`
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a += x<<8 + x>>8
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// amd64:"ROLW\t[$]9"
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a += x<<9 ^ x>>7
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return a
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}
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func rot8(x uint8) uint8 {
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var a uint8
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// amd64:"ROLB\t[$]5"
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a += x<<5 | x>>3
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// amd64:`ROLB\t[$]6`
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a += x<<6 + x>>2
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// amd64:"ROLB\t[$]7"
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a += x<<7 ^ x>>1
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return a
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}
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// ----------------------- //
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// non-const rotates //
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// ----------------------- //
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func rot64nc(x uint64, z uint) uint64 {
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var a uint64
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z &= 63
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// amd64:"ROLQ"
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// ppc64:"ROTL"
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// ppc64le:"ROTL"
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a += x<<z | x>>(64-z)
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// amd64:"RORQ"
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a += x>>z | x<<(64-z)
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return a
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}
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func rot32nc(x uint32, z uint) uint32 {
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var a uint32
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z &= 31
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// amd64:"ROLL"
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// ppc64:"ROTLW"
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// ppc64le:"ROTLW"
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a += x<<z | x>>(32-z)
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// amd64:"RORL"
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a += x>>z | x<<(32-z)
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return a
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}
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func rot16nc(x uint16, z uint) uint16 {
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var a uint16
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z &= 15
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// amd64:"ROLW"
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a += x<<z | x>>(16-z)
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// amd64:"RORW"
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a += x>>z | x<<(16-z)
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return a
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}
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func rot8nc(x uint8, z uint) uint8 {
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var a uint8
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z &= 7
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// amd64:"ROLB"
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a += x<<z | x>>(8-z)
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// amd64:"RORB"
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a += x>>z | x<<(8-z)
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return a
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}
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// Issue 18254: rotate after inlining
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func f32(x uint32) uint32 {
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// amd64:"ROLL\t[$]7"
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return rot32nc(x, 7)
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}
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