mirror of
https://github.com/golang/go
synced 2024-11-14 13:20:30 -07:00
2c5b707b3b
goos: linux
goarch: loong64
pkg: math/bits
cpu: Loongson-3A6000 @ 2500.00MHz
│ bench.old │ bench.new │
│ sec/op │ sec/op vs base │
RotateLeft8 1.401n ± 0% 1.201n ± 0% -14.28% (p=0.000 n=20)
RotateLeft16 1.4010n ± 0% 0.8032n ± 0% -42.67% (p=0.000 n=20)
geomean 1.401n 0.9822n -29.90%
goos: linux
goarch: loong64
pkg: math/bits
cpu: Loongson-3A5000 @ 2500.00MHz
│ bench.old │ bench.new │
│ sec/op │ sec/op vs base │
RotateLeft8 1.576n ± 0% 1.310n ± 0% -16.88% (p=0.000 n=20)
RotateLeft16 1.576n ± 0% 1.166n ± 0% -26.02% (p=0.000 n=20)
geomean 1.576n 1.236n -21.58%
Change-Id: I39c18306be0b8fd31b57bd0911714abd1783b50e
Reviewed-on: https://go-review.googlesource.com/c/go/+/604738
Auto-Submit: abner chenc <chenguoqi@loongson.cn>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Tim King <taking@google.com>
893 lines
20 KiB
Go
893 lines
20 KiB
Go
// 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
|
|
|
|
import "math/bits"
|
|
|
|
// ----------------------- //
|
|
// bits.LeadingZeros //
|
|
// ----------------------- //
|
|
|
|
func LeadingZeros(n uint) int {
|
|
// amd64/v1,amd64/v2:"BSRQ"
|
|
// amd64/v3:"LZCNTQ", -"BSRQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"CNTLZD"
|
|
return bits.LeadingZeros(n)
|
|
}
|
|
|
|
func LeadingZeros64(n uint64) int {
|
|
// amd64/v1,amd64/v2:"BSRQ"
|
|
// amd64/v3:"LZCNTQ", -"BSRQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"CNTLZD"
|
|
return bits.LeadingZeros64(n)
|
|
}
|
|
|
|
func LeadingZeros32(n uint32) int {
|
|
// amd64/v1,amd64/v2:"BSRQ","LEAQ",-"CMOVQEQ"
|
|
// amd64/v3: "LZCNTL",- "BSRL"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZW"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"CNTLZW"
|
|
return bits.LeadingZeros32(n)
|
|
}
|
|
|
|
func LeadingZeros16(n uint16) int {
|
|
// amd64/v1,amd64/v2:"BSRL","LEAL",-"CMOVQEQ"
|
|
// amd64/v3: "LZCNTL",- "BSRL"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"CNTLZD"
|
|
return bits.LeadingZeros16(n)
|
|
}
|
|
|
|
func LeadingZeros8(n uint8) int {
|
|
// amd64/v1,amd64/v2:"BSRL","LEAL",-"CMOVQEQ"
|
|
// amd64/v3: "LZCNTL",- "BSRL"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"CNTLZD"
|
|
return bits.LeadingZeros8(n)
|
|
}
|
|
|
|
// --------------- //
|
|
// bits.Len* //
|
|
// --------------- //
|
|
|
|
func Len(n uint) int {
|
|
// amd64/v1,amd64/v2:"BSRQ"
|
|
// amd64/v3: "LZCNTQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"SUBC","CNTLZD"
|
|
return bits.Len(n)
|
|
}
|
|
|
|
func Len64(n uint64) int {
|
|
// amd64/v1,amd64/v2:"BSRQ"
|
|
// amd64/v3: "LZCNTQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"SUBC","CNTLZD"
|
|
return bits.Len64(n)
|
|
}
|
|
|
|
func SubFromLen64(n uint64) int {
|
|
// ppc64x:"CNTLZD",-"SUBC"
|
|
return 64 - bits.Len64(n)
|
|
}
|
|
|
|
func Len32(n uint32) int {
|
|
// amd64/v1,amd64/v2:"BSRQ","LEAQ",-"CMOVQEQ"
|
|
// amd64/v3: "LZCNTL"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x: "CNTLZW"
|
|
return bits.Len32(n)
|
|
}
|
|
|
|
func Len16(n uint16) int {
|
|
// amd64/v1,amd64/v2:"BSRL","LEAL",-"CMOVQEQ"
|
|
// amd64/v3: "LZCNTL"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"SUBC","CNTLZD"
|
|
return bits.Len16(n)
|
|
}
|
|
|
|
func Len8(n uint8) int {
|
|
// amd64/v1,amd64/v2:"BSRL","LEAL",-"CMOVQEQ"
|
|
// amd64/v3: "LZCNTL"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64x:"SUBC","CNTLZD"
|
|
return bits.Len8(n)
|
|
}
|
|
|
|
// -------------------- //
|
|
// bits.OnesCount //
|
|
// -------------------- //
|
|
|
|
// TODO(register args) Restore a m d 6 4 / v 1 :.*x86HasPOPCNT when only one ABI is tested.
|
|
func OnesCount(n uint) int {
|
|
// amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT"
|
|
// amd64:"POPCNTQ"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64x:"POPCNTD"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount(n)
|
|
}
|
|
|
|
func OnesCount64(n uint64) int {
|
|
// amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT"
|
|
// amd64:"POPCNTQ"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64x:"POPCNTD"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount64(n)
|
|
}
|
|
|
|
func OnesCount32(n uint32) int {
|
|
// amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT"
|
|
// amd64:"POPCNTL"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64x:"POPCNTW"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount32(n)
|
|
}
|
|
|
|
func OnesCount16(n uint16) int {
|
|
// amd64/v2:-".*x86HasPOPCNT" amd64/v3:-".*x86HasPOPCNT"
|
|
// amd64:"POPCNTL"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64x:"POPCNTW"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount16(n)
|
|
}
|
|
|
|
func OnesCount8(n uint8) int {
|
|
// s390x:"POPCNT"
|
|
// ppc64x:"POPCNTB"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount8(n)
|
|
}
|
|
|
|
// ----------------------- //
|
|
// bits.ReverseBytes //
|
|
// ----------------------- //
|
|
|
|
func ReverseBytes(n uint) uint {
|
|
// amd64:"BSWAPQ"
|
|
// 386:"BSWAPL"
|
|
// s390x:"MOVDBR"
|
|
// arm64:"REV"
|
|
return bits.ReverseBytes(n)
|
|
}
|
|
|
|
func ReverseBytes64(n uint64) uint64 {
|
|
// amd64:"BSWAPQ"
|
|
// 386:"BSWAPL"
|
|
// s390x:"MOVDBR"
|
|
// arm64:"REV"
|
|
// ppc64x/power10: "BRD"
|
|
return bits.ReverseBytes64(n)
|
|
}
|
|
|
|
func ReverseBytes32(n uint32) uint32 {
|
|
// amd64:"BSWAPL"
|
|
// 386:"BSWAPL"
|
|
// s390x:"MOVWBR"
|
|
// arm64:"REVW"
|
|
// ppc64x/power10: "BRW"
|
|
return bits.ReverseBytes32(n)
|
|
}
|
|
|
|
func ReverseBytes16(n uint16) uint16 {
|
|
// amd64:"ROLW"
|
|
// arm64:"REV16W",-"UBFX",-"ORR"
|
|
// arm/5:"SLL","SRL","ORR"
|
|
// arm/6:"REV16"
|
|
// arm/7:"REV16"
|
|
// ppc64x/power10: "BRH"
|
|
return bits.ReverseBytes16(n)
|
|
}
|
|
|
|
// --------------------- //
|
|
// bits.RotateLeft //
|
|
// --------------------- //
|
|
|
|
func RotateLeft64(n uint64) uint64 {
|
|
// amd64:"ROLQ"
|
|
// arm64:"ROR"
|
|
// loong64:"ROTRV"
|
|
// ppc64x:"ROTL"
|
|
// riscv64:"RORI"
|
|
// s390x:"RISBGZ\t[$]0, [$]63, [$]37, "
|
|
// wasm:"I64Rotl"
|
|
return bits.RotateLeft64(n, 37)
|
|
}
|
|
|
|
func RotateLeft32(n uint32) uint32 {
|
|
// amd64:"ROLL" 386:"ROLL"
|
|
// arm:`MOVW\tR[0-9]+@>23`
|
|
// arm64:"RORW"
|
|
// loong64:"ROTR\t"
|
|
// ppc64x:"ROTLW"
|
|
// riscv64:"RORIW"
|
|
// s390x:"RLL"
|
|
// wasm:"I32Rotl"
|
|
return bits.RotateLeft32(n, 9)
|
|
}
|
|
|
|
func RotateLeft16(n uint16, s int) uint16 {
|
|
// amd64:"ROLW" 386:"ROLW"
|
|
// arm64:"RORW",-"CSEL"
|
|
// loong64:"ROTR\t","SLLV"
|
|
return bits.RotateLeft16(n, s)
|
|
}
|
|
|
|
func RotateLeft8(n uint8, s int) uint8 {
|
|
// amd64:"ROLB" 386:"ROLB"
|
|
// arm64:"LSL","LSR",-"CSEL"
|
|
// loong64:"OR","SLLV","SRLV"
|
|
return bits.RotateLeft8(n, s)
|
|
}
|
|
|
|
func RotateLeftVariable(n uint, m int) uint {
|
|
// amd64:"ROLQ"
|
|
// arm64:"ROR"
|
|
// loong64:"ROTRV"
|
|
// ppc64x:"ROTL"
|
|
// riscv64:"ROL"
|
|
// s390x:"RLLG"
|
|
// wasm:"I64Rotl"
|
|
return bits.RotateLeft(n, m)
|
|
}
|
|
|
|
func RotateLeftVariable64(n uint64, m int) uint64 {
|
|
// amd64:"ROLQ"
|
|
// arm64:"ROR"
|
|
// loong64:"ROTRV"
|
|
// ppc64x:"ROTL"
|
|
// riscv64:"ROL"
|
|
// s390x:"RLLG"
|
|
// wasm:"I64Rotl"
|
|
return bits.RotateLeft64(n, m)
|
|
}
|
|
|
|
func RotateLeftVariable32(n uint32, m int) uint32 {
|
|
// arm:`MOVW\tR[0-9]+@>R[0-9]+`
|
|
// amd64:"ROLL"
|
|
// arm64:"RORW"
|
|
// loong64:"ROTR\t"
|
|
// ppc64x:"ROTLW"
|
|
// riscv64:"ROLW"
|
|
// s390x:"RLL"
|
|
// wasm:"I32Rotl"
|
|
return bits.RotateLeft32(n, m)
|
|
}
|
|
|
|
// ------------------------ //
|
|
// bits.TrailingZeros //
|
|
// ------------------------ //
|
|
|
|
func TrailingZeros(n uint) int {
|
|
// amd64/v1,amd64/v2:"BSFQ","MOVL\t\\$64","CMOVQEQ"
|
|
// amd64/v3:"TZCNTQ"
|
|
// 386:"BSFL"
|
|
// arm:"CLZ"
|
|
// arm64:"RBIT","CLZ"
|
|
// s390x:"FLOGR"
|
|
// ppc64x/power8:"ANDN","POPCNTD"
|
|
// ppc64x/power9: "CNTTZD"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros(n)
|
|
}
|
|
|
|
func TrailingZeros64(n uint64) int {
|
|
// amd64/v1,amd64/v2:"BSFQ","MOVL\t\\$64","CMOVQEQ"
|
|
// amd64/v3:"TZCNTQ"
|
|
// 386:"BSFL"
|
|
// arm64:"RBIT","CLZ"
|
|
// s390x:"FLOGR"
|
|
// ppc64x/power8:"ANDN","POPCNTD"
|
|
// ppc64x/power9: "CNTTZD"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros64(n)
|
|
}
|
|
|
|
func TrailingZeros64Subtract(n uint64) int {
|
|
// ppc64x/power8:"NEG","SUBC","ANDN","POPCNTD"
|
|
// ppc64x/power9:"SUBC","CNTTZD"
|
|
return bits.TrailingZeros64(1 - n)
|
|
}
|
|
|
|
func TrailingZeros32(n uint32) int {
|
|
// amd64/v1,amd64/v2:"BTSQ\\t\\$32","BSFQ"
|
|
// amd64/v3:"TZCNTL"
|
|
// 386:"BSFL"
|
|
// arm:"CLZ"
|
|
// arm64:"RBITW","CLZW"
|
|
// s390x:"FLOGR","MOVWZ"
|
|
// ppc64x/power8:"ANDN","POPCNTW"
|
|
// ppc64x/power9: "CNTTZW"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros32(n)
|
|
}
|
|
|
|
func TrailingZeros16(n uint16) int {
|
|
// amd64:"BSFL","ORL\\t\\$65536"
|
|
// 386:"BSFL\t"
|
|
// arm:"ORR\t\\$65536","CLZ",-"MOVHU\tR"
|
|
// arm64:"ORR\t\\$65536","RBITW","CLZW",-"MOVHU\tR",-"RBIT\t",-"CLZ\t"
|
|
// s390x:"FLOGR","OR\t\\$65536"
|
|
// ppc64x/power8:"POPCNTD","ORIS\\t\\$1"
|
|
// ppc64x/power9:"CNTTZD","ORIS\\t\\$1"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros16(n)
|
|
}
|
|
|
|
func TrailingZeros8(n uint8) int {
|
|
// amd64:"BSFL","ORL\\t\\$256"
|
|
// 386:"BSFL"
|
|
// arm:"ORR\t\\$256","CLZ",-"MOVBU\tR"
|
|
// arm64:"ORR\t\\$256","RBITW","CLZW",-"MOVBU\tR",-"RBIT\t",-"CLZ\t"
|
|
// s390x:"FLOGR","OR\t\\$256"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros8(n)
|
|
}
|
|
|
|
// IterateBitsNN checks special handling of TrailingZerosNN when the input is known to be non-zero.
|
|
|
|
func IterateBits(n uint) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64/v1,amd64/v2:"BSFQ",-"CMOVEQ"
|
|
// amd64/v3:"TZCNTQ"
|
|
i += bits.TrailingZeros(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits64(n uint64) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64/v1,amd64/v2:"BSFQ",-"CMOVEQ"
|
|
// amd64/v3:"TZCNTQ"
|
|
i += bits.TrailingZeros64(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits32(n uint32) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64/v1,amd64/v2:"BSFL",-"BTSQ"
|
|
// amd64/v3:"TZCNTL"
|
|
i += bits.TrailingZeros32(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits16(n uint16) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64/v1,amd64/v2:"BSFL",-"BTSL"
|
|
// amd64/v3:"TZCNTL"
|
|
// arm64:"RBITW","CLZW",-"ORR"
|
|
i += bits.TrailingZeros16(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits8(n uint8) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64/v1,amd64/v2:"BSFL",-"BTSL"
|
|
// amd64/v3:"TZCNTL"
|
|
// arm64:"RBITW","CLZW",-"ORR"
|
|
i += bits.TrailingZeros8(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
// --------------- //
|
|
// bits.Add* //
|
|
// --------------- //
|
|
|
|
func Add(x, y, ci uint) (r, co uint) {
|
|
// arm64:"ADDS","ADCS","ADC",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ","SBBQ","NEGQ"
|
|
// ppc64x: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
// riscv64: "ADD","SLTU"
|
|
return bits.Add(x, y, ci)
|
|
}
|
|
|
|
func AddC(x, ci uint) (r, co uint) {
|
|
// arm64:"ADDS","ADCS","ADC",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ","SBBQ","NEGQ"
|
|
// loong64: "ADDV", "SGTU"
|
|
// ppc64x: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
// mips64:"ADDV","SGTU"
|
|
// riscv64: "ADD","SLTU"
|
|
return bits.Add(x, 7, ci)
|
|
}
|
|
|
|
func AddZ(x, y uint) (r, co uint) {
|
|
// arm64:"ADDS","ADC",-"ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
|
|
// loong64: "ADDV", "SGTU"
|
|
// ppc64x: "ADDC", -"ADDE", "ADDZE"
|
|
// s390x:"ADDC",-"ADDC\t[$]-1,"
|
|
// mips64:"ADDV","SGTU"
|
|
// riscv64: "ADD","SLTU"
|
|
return bits.Add(x, y, 0)
|
|
}
|
|
|
|
func AddR(x, y, ci uint) uint {
|
|
// arm64:"ADDS","ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
|
|
// loong64: "ADDV", -"SGTU"
|
|
// ppc64x: "ADDC", "ADDE", -"ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
// mips64:"ADDV",-"SGTU"
|
|
// riscv64: "ADD",-"SLTU"
|
|
r, _ := bits.Add(x, y, ci)
|
|
return r
|
|
}
|
|
|
|
func AddM(p, q, r *[3]uint) {
|
|
var c uint
|
|
r[0], c = bits.Add(p[0], q[0], c)
|
|
// arm64:"ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ"
|
|
// s390x:"ADDE",-"ADDC\t[$]-1,"
|
|
r[1], c = bits.Add(p[1], q[1], c)
|
|
r[2], c = bits.Add(p[2], q[2], c)
|
|
}
|
|
|
|
func Add64(x, y, ci uint64) (r, co uint64) {
|
|
// arm64:"ADDS","ADCS","ADC",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ","SBBQ","NEGQ"
|
|
// loong64: "ADDV", "SGTU"
|
|
// ppc64x: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
// mips64:"ADDV","SGTU"
|
|
// riscv64: "ADD","SLTU"
|
|
return bits.Add64(x, y, ci)
|
|
}
|
|
|
|
func Add64C(x, ci uint64) (r, co uint64) {
|
|
// arm64:"ADDS","ADCS","ADC",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ","SBBQ","NEGQ"
|
|
// loong64: "ADDV", "SGTU"
|
|
// ppc64x: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
// mips64:"ADDV","SGTU"
|
|
// riscv64: "ADD","SLTU"
|
|
return bits.Add64(x, 7, ci)
|
|
}
|
|
|
|
func Add64Z(x, y uint64) (r, co uint64) {
|
|
// arm64:"ADDS","ADC",-"ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
|
|
// loong64: "ADDV", "SGTU"
|
|
// ppc64x: "ADDC", -"ADDE", "ADDZE"
|
|
// s390x:"ADDC",-"ADDC\t[$]-1,"
|
|
// mips64:"ADDV","SGTU"
|
|
// riscv64: "ADD","SLTU"
|
|
return bits.Add64(x, y, 0)
|
|
}
|
|
|
|
func Add64R(x, y, ci uint64) uint64 {
|
|
// arm64:"ADDS","ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
|
|
// loong64: "ADDV", -"SGTU"
|
|
// ppc64x: "ADDC", "ADDE", -"ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
// mips64:"ADDV",-"SGTU"
|
|
// riscv64: "ADD",-"SLTU"
|
|
r, _ := bits.Add64(x, y, ci)
|
|
return r
|
|
}
|
|
|
|
func Add64M(p, q, r *[3]uint64) {
|
|
var c uint64
|
|
r[0], c = bits.Add64(p[0], q[0], c)
|
|
// arm64:"ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ"
|
|
// ppc64x: -"ADDC", "ADDE", -"ADDZE"
|
|
// s390x:"ADDE",-"ADDC\t[$]-1,"
|
|
r[1], c = bits.Add64(p[1], q[1], c)
|
|
r[2], c = bits.Add64(p[2], q[2], c)
|
|
}
|
|
|
|
func Add64M0(p, q, r *[3]uint64) {
|
|
var c uint64
|
|
r[0], c = bits.Add64(p[0], q[0], 0)
|
|
// ppc64x: -"ADDC", -"ADDE", "ADDZE\tR[1-9]"
|
|
r[1], c = bits.Add64(p[1], 0, c)
|
|
// ppc64x: -"ADDC", "ADDE", -"ADDZE"
|
|
r[2], c = bits.Add64(p[2], p[2], c)
|
|
}
|
|
|
|
func Add64MSaveC(p, q, r, c *[2]uint64) {
|
|
// ppc64x: "ADDC\tR", "ADDZE"
|
|
r[0], c[0] = bits.Add64(p[0], q[0], 0)
|
|
// ppc64x: "ADDC\t[$]-1", "ADDE", "ADDZE"
|
|
r[1], c[1] = bits.Add64(p[1], q[1], c[0])
|
|
}
|
|
|
|
func Add64PanicOnOverflowEQ(a, b uint64) uint64 {
|
|
r, c := bits.Add64(a, b, 0)
|
|
// s390x:"BRC\t[$]3,",-"ADDE"
|
|
if c == 1 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Add64PanicOnOverflowNE(a, b uint64) uint64 {
|
|
r, c := bits.Add64(a, b, 0)
|
|
// s390x:"BRC\t[$]3,",-"ADDE"
|
|
if c != 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Add64PanicOnOverflowGT(a, b uint64) uint64 {
|
|
r, c := bits.Add64(a, b, 0)
|
|
// s390x:"BRC\t[$]3,",-"ADDE"
|
|
if c > 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Add64MPanicOnOverflowEQ(a, b [2]uint64) [2]uint64 {
|
|
var r [2]uint64
|
|
var c uint64
|
|
r[0], c = bits.Add64(a[0], b[0], c)
|
|
r[1], c = bits.Add64(a[1], b[1], c)
|
|
// s390x:"BRC\t[$]3,"
|
|
if c == 1 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Add64MPanicOnOverflowNE(a, b [2]uint64) [2]uint64 {
|
|
var r [2]uint64
|
|
var c uint64
|
|
r[0], c = bits.Add64(a[0], b[0], c)
|
|
r[1], c = bits.Add64(a[1], b[1], c)
|
|
// s390x:"BRC\t[$]3,"
|
|
if c != 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Add64MPanicOnOverflowGT(a, b [2]uint64) [2]uint64 {
|
|
var r [2]uint64
|
|
var c uint64
|
|
r[0], c = bits.Add64(a[0], b[0], c)
|
|
r[1], c = bits.Add64(a[1], b[1], c)
|
|
// s390x:"BRC\t[$]3,"
|
|
if c > 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
// Verify independent carry chain operations are scheduled efficiently
|
|
// and do not cause unnecessary save/restore of the CA bit.
|
|
//
|
|
// This is an example of why CarryChainTail priority must be lower
|
|
// (earlier in the block) than Memory. f[0]=f1 could be scheduled
|
|
// after the first two lower 64 bit limb adds, but before either
|
|
// high 64 bit limbs are added.
|
|
//
|
|
// This is what happened on PPC64 when compiling
|
|
// crypto/internal/edwards25519/field.feMulGeneric.
|
|
func Add64MultipleChains(a, b, c, d [2]uint64) {
|
|
var cx, d1, d2 uint64
|
|
a1, a2 := a[0], a[1]
|
|
b1, b2 := b[0], b[1]
|
|
c1, c2 := c[0], c[1]
|
|
|
|
// ppc64x: "ADDC\tR\\d+,", -"ADDE", -"MOVD\tXER"
|
|
d1, cx = bits.Add64(a1, b1, 0)
|
|
// ppc64x: "ADDE", -"ADDC", -"MOVD\t.*, XER"
|
|
d2, _ = bits.Add64(a2, b2, cx)
|
|
|
|
// ppc64x: "ADDC\tR\\d+,", -"ADDE", -"MOVD\tXER"
|
|
d1, cx = bits.Add64(c1, d1, 0)
|
|
// ppc64x: "ADDE", -"ADDC", -"MOVD\t.*, XER"
|
|
d2, _ = bits.Add64(c2, d2, cx)
|
|
d[0] = d1
|
|
d[1] = d2
|
|
}
|
|
|
|
// --------------- //
|
|
// bits.Sub* //
|
|
// --------------- //
|
|
|
|
func Sub(x, y, ci uint) (r, co uint) {
|
|
// amd64:"NEGL","SBBQ","NEGQ"
|
|
// arm64:"NEGS","SBCS","NGC","NEG",-"ADD",-"SUB",-"CMP"
|
|
// loong64:"SUBV","SGTU"
|
|
// ppc64x:"SUBC", "SUBE", "SUBZE", "NEG"
|
|
// s390x:"SUBE"
|
|
// mips64:"SUBV","SGTU"
|
|
// riscv64: "SUB","SLTU"
|
|
return bits.Sub(x, y, ci)
|
|
}
|
|
|
|
func SubC(x, ci uint) (r, co uint) {
|
|
// amd64:"NEGL","SBBQ","NEGQ"
|
|
// arm64:"NEGS","SBCS","NGC","NEG",-"ADD",-"SUB",-"CMP"
|
|
// loong64:"SUBV","SGTU"
|
|
// ppc64x:"SUBC", "SUBE", "SUBZE", "NEG"
|
|
// s390x:"SUBE"
|
|
// mips64:"SUBV","SGTU"
|
|
// riscv64: "SUB","SLTU"
|
|
return bits.Sub(x, 7, ci)
|
|
}
|
|
|
|
func SubZ(x, y uint) (r, co uint) {
|
|
// amd64:"SUBQ","SBBQ","NEGQ",-"NEGL"
|
|
// arm64:"SUBS","NGC","NEG",-"SBCS",-"ADD",-"SUB\t",-"CMP"
|
|
// loong64:"SUBV","SGTU"
|
|
// ppc64x:"SUBC", -"SUBE", "SUBZE", "NEG"
|
|
// s390x:"SUBC"
|
|
// mips64:"SUBV","SGTU"
|
|
// riscv64: "SUB","SLTU"
|
|
return bits.Sub(x, y, 0)
|
|
}
|
|
|
|
func SubR(x, y, ci uint) uint {
|
|
// amd64:"NEGL","SBBQ",-"NEGQ"
|
|
// arm64:"NEGS","SBCS",-"NGC",-"NEG\t",-"ADD",-"SUB",-"CMP"
|
|
// loong64:"SUBV",-"SGTU"
|
|
// ppc64x:"SUBC", "SUBE", -"SUBZE", -"NEG"
|
|
// s390x:"SUBE"
|
|
// riscv64: "SUB",-"SLTU"
|
|
r, _ := bits.Sub(x, y, ci)
|
|
return r
|
|
}
|
|
func SubM(p, q, r *[3]uint) {
|
|
var c uint
|
|
r[0], c = bits.Sub(p[0], q[0], c)
|
|
// amd64:"SBBQ",-"NEGL",-"NEGQ"
|
|
// arm64:"SBCS",-"NEGS",-"NGC",-"NEG",-"ADD",-"SUB",-"CMP"
|
|
// ppc64x:-"SUBC", "SUBE", -"SUBZE", -"NEG"
|
|
// s390x:"SUBE"
|
|
r[1], c = bits.Sub(p[1], q[1], c)
|
|
r[2], c = bits.Sub(p[2], q[2], c)
|
|
}
|
|
|
|
func Sub64(x, y, ci uint64) (r, co uint64) {
|
|
// amd64:"NEGL","SBBQ","NEGQ"
|
|
// arm64:"NEGS","SBCS","NGC","NEG",-"ADD",-"SUB",-"CMP"
|
|
// loong64:"SUBV","SGTU"
|
|
// ppc64x:"SUBC", "SUBE", "SUBZE", "NEG"
|
|
// s390x:"SUBE"
|
|
// mips64:"SUBV","SGTU"
|
|
// riscv64: "SUB","SLTU"
|
|
return bits.Sub64(x, y, ci)
|
|
}
|
|
|
|
func Sub64C(x, ci uint64) (r, co uint64) {
|
|
// amd64:"NEGL","SBBQ","NEGQ"
|
|
// arm64:"NEGS","SBCS","NGC","NEG",-"ADD",-"SUB",-"CMP"
|
|
// loong64:"SUBV","SGTU"
|
|
// ppc64x:"SUBC", "SUBE", "SUBZE", "NEG"
|
|
// s390x:"SUBE"
|
|
// mips64:"SUBV","SGTU"
|
|
// riscv64: "SUB","SLTU"
|
|
return bits.Sub64(x, 7, ci)
|
|
}
|
|
|
|
func Sub64Z(x, y uint64) (r, co uint64) {
|
|
// amd64:"SUBQ","SBBQ","NEGQ",-"NEGL"
|
|
// arm64:"SUBS","NGC","NEG",-"SBCS",-"ADD",-"SUB\t",-"CMP"
|
|
// loong64:"SUBV","SGTU"
|
|
// ppc64x:"SUBC", -"SUBE", "SUBZE", "NEG"
|
|
// s390x:"SUBC"
|
|
// mips64:"SUBV","SGTU"
|
|
// riscv64: "SUB","SLTU"
|
|
return bits.Sub64(x, y, 0)
|
|
}
|
|
|
|
func Sub64R(x, y, ci uint64) uint64 {
|
|
// amd64:"NEGL","SBBQ",-"NEGQ"
|
|
// arm64:"NEGS","SBCS",-"NGC",-"NEG\t",-"ADD",-"SUB",-"CMP"
|
|
// loong64:"SUBV",-"SGTU"
|
|
// ppc64x:"SUBC", "SUBE", -"SUBZE", -"NEG"
|
|
// s390x:"SUBE"
|
|
// riscv64: "SUB",-"SLTU"
|
|
r, _ := bits.Sub64(x, y, ci)
|
|
return r
|
|
}
|
|
func Sub64M(p, q, r *[3]uint64) {
|
|
var c uint64
|
|
r[0], c = bits.Sub64(p[0], q[0], c)
|
|
// amd64:"SBBQ",-"NEGL",-"NEGQ"
|
|
// arm64:"SBCS",-"NEGS",-"NGC",-"NEG",-"ADD",-"SUB",-"CMP"
|
|
// s390x:"SUBE"
|
|
r[1], c = bits.Sub64(p[1], q[1], c)
|
|
r[2], c = bits.Sub64(p[2], q[2], c)
|
|
}
|
|
|
|
func Sub64MSaveC(p, q, r, c *[2]uint64) {
|
|
// ppc64x:"SUBC\tR\\d+, R\\d+,", "SUBZE", "NEG"
|
|
r[0], c[0] = bits.Sub64(p[0], q[0], 0)
|
|
// ppc64x:"SUBC\tR\\d+, [$]0,", "SUBE", "SUBZE", "NEG"
|
|
r[1], c[1] = bits.Sub64(p[1], q[1], c[0])
|
|
}
|
|
|
|
func Sub64PanicOnOverflowEQ(a, b uint64) uint64 {
|
|
r, b := bits.Sub64(a, b, 0)
|
|
// s390x:"BRC\t[$]12,",-"ADDE",-"SUBE"
|
|
if b == 1 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Sub64PanicOnOverflowNE(a, b uint64) uint64 {
|
|
r, b := bits.Sub64(a, b, 0)
|
|
// s390x:"BRC\t[$]12,",-"ADDE",-"SUBE"
|
|
if b != 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Sub64PanicOnOverflowGT(a, b uint64) uint64 {
|
|
r, b := bits.Sub64(a, b, 0)
|
|
// s390x:"BRC\t[$]12,",-"ADDE",-"SUBE"
|
|
if b > 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Sub64MPanicOnOverflowEQ(a, b [2]uint64) [2]uint64 {
|
|
var r [2]uint64
|
|
var c uint64
|
|
r[0], c = bits.Sub64(a[0], b[0], c)
|
|
r[1], c = bits.Sub64(a[1], b[1], c)
|
|
// s390x:"BRC\t[$]12,"
|
|
if c == 1 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Sub64MPanicOnOverflowNE(a, b [2]uint64) [2]uint64 {
|
|
var r [2]uint64
|
|
var c uint64
|
|
r[0], c = bits.Sub64(a[0], b[0], c)
|
|
r[1], c = bits.Sub64(a[1], b[1], c)
|
|
// s390x:"BRC\t[$]12,"
|
|
if c != 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
func Sub64MPanicOnOverflowGT(a, b [2]uint64) [2]uint64 {
|
|
var r [2]uint64
|
|
var c uint64
|
|
r[0], c = bits.Sub64(a[0], b[0], c)
|
|
r[1], c = bits.Sub64(a[1], b[1], c)
|
|
// s390x:"BRC\t[$]12,"
|
|
if c > 0 {
|
|
panic("overflow")
|
|
}
|
|
return r
|
|
}
|
|
|
|
// --------------- //
|
|
// bits.Mul* //
|
|
// --------------- //
|
|
|
|
func Mul(x, y uint) (hi, lo uint) {
|
|
// amd64:"MULQ"
|
|
// arm64:"UMULH","MUL"
|
|
// ppc64x:"MULHDU","MULLD"
|
|
// s390x:"MLGR"
|
|
// mips64: "MULVU"
|
|
// riscv64:"MULHU","MUL"
|
|
return bits.Mul(x, y)
|
|
}
|
|
|
|
func Mul64(x, y uint64) (hi, lo uint64) {
|
|
// amd64:"MULQ"
|
|
// arm64:"UMULH","MUL"
|
|
// ppc64x:"MULHDU","MULLD"
|
|
// s390x:"MLGR"
|
|
// mips64: "MULVU"
|
|
// riscv64:"MULHU","MUL"
|
|
return bits.Mul64(x, y)
|
|
}
|
|
|
|
func Mul64HiOnly(x, y uint64) uint64 {
|
|
// arm64:"UMULH",-"MUL"
|
|
// riscv64:"MULHU",-"MUL\t"
|
|
hi, _ := bits.Mul64(x, y)
|
|
return hi
|
|
}
|
|
|
|
func Mul64LoOnly(x, y uint64) uint64 {
|
|
// arm64:"MUL",-"UMULH"
|
|
// riscv64:"MUL\t",-"MULHU"
|
|
_, lo := bits.Mul64(x, y)
|
|
return lo
|
|
}
|
|
|
|
// --------------- //
|
|
// bits.Div* //
|
|
// --------------- //
|
|
|
|
func Div(hi, lo, x uint) (q, r uint) {
|
|
// amd64:"DIVQ"
|
|
return bits.Div(hi, lo, x)
|
|
}
|
|
|
|
func Div32(hi, lo, x uint32) (q, r uint32) {
|
|
// arm64:"ORR","UDIV","MSUB",-"UREM"
|
|
return bits.Div32(hi, lo, x)
|
|
}
|
|
|
|
func Div64(hi, lo, x uint64) (q, r uint64) {
|
|
// amd64:"DIVQ"
|
|
return bits.Div64(hi, lo, x)
|
|
}
|
|
|
|
func Div64degenerate(x uint64) (q, r uint64) {
|
|
// amd64:-"DIVQ"
|
|
return bits.Div64(0, x, 5)
|
|
}
|