mirror of
https://github.com/golang/go
synced 2024-11-26 23:11:24 -07:00
efd206eb40
According to RISCV instruction set manual v2.2 Sec 6.1 MULHU followed by MUL will be fused into one multiply by microarchitecture Benchstat on Hifive unmatched: name old time/op new time/op delta Hash8Bytes 245ns ± 3% 186ns ± 4% -23.99% (p=0.000 n=10+10) Hash320Bytes 1.94µs ± 1% 1.31µs ± 1% -32.38% (p=0.000 n=9+10) Hash1K 5.84µs ± 0% 3.84µs ± 0% -34.20% (p=0.000 n=10+9) Hash8K 45.3µs ± 0% 29.4µs ± 0% -35.04% (p=0.000 n=10+10) name old speed new speed delta Hash8Bytes 32.7MB/s ± 3% 43.0MB/s ± 4% +31.61% (p=0.000 n=10+10) Hash320Bytes 165MB/s ± 1% 244MB/s ± 1% +47.88% (p=0.000 n=9+10) Hash1K 175MB/s ± 0% 266MB/s ± 0% +51.98% (p=0.000 n=10+9) Hash8K 181MB/s ± 0% 279MB/s ± 0% +53.94% (p=0.000 n=10+10) Change-Id: I3561495d02a4a0ad8578e9b9819bf0a4eaca5d12 Reviewed-on: https://go-review.googlesource.com/c/go/+/329970 Reviewed-by: Joel Sing <joel@sing.id.au> Run-TryBot: Joel Sing <joel@sing.id.au> TryBot-Result: Go Bot <gobot@golang.org> Trust: Meng Zhuo <mzh@golangcn.org>
740 lines
16 KiB
Go
740 lines
16 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:"BSRQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.LeadingZeros(n)
|
|
}
|
|
|
|
func LeadingZeros64(n uint64) int {
|
|
// amd64:"BSRQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.LeadingZeros64(n)
|
|
}
|
|
|
|
func LeadingZeros32(n uint32) int {
|
|
// amd64:"BSRQ","LEAQ",-"CMOVQEQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZW"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.LeadingZeros32(n)
|
|
}
|
|
|
|
func LeadingZeros16(n uint16) int {
|
|
// amd64:"BSRL","LEAL",-"CMOVQEQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.LeadingZeros16(n)
|
|
}
|
|
|
|
func LeadingZeros8(n uint8) int {
|
|
// amd64:"BSRL","LEAL",-"CMOVQEQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.LeadingZeros8(n)
|
|
}
|
|
|
|
// --------------- //
|
|
// bits.Len* //
|
|
// --------------- //
|
|
|
|
func Len(n uint) int {
|
|
// amd64:"BSRQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.Len(n)
|
|
}
|
|
|
|
func Len64(n uint64) int {
|
|
// amd64:"BSRQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
// ppc64le:"SUBC","CNTLZD"
|
|
// ppc64:"SUBC","CNTLZD"
|
|
return bits.Len64(n)
|
|
}
|
|
|
|
func SubFromLen64(n uint64) int {
|
|
// ppc64le:"CNTLZD",-"SUBC"
|
|
// ppc64:"CNTLZD",-"SUBC"
|
|
return 64 - bits.Len64(n)
|
|
}
|
|
|
|
func Len32(n uint32) int {
|
|
// amd64:"BSRQ","LEAQ",-"CMOVQEQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.Len32(n)
|
|
}
|
|
|
|
func Len16(n uint16) int {
|
|
// amd64:"BSRL","LEAL",-"CMOVQEQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.Len16(n)
|
|
}
|
|
|
|
func Len8(n uint8) int {
|
|
// amd64:"BSRL","LEAL",-"CMOVQEQ"
|
|
// s390x:"FLOGR"
|
|
// arm:"CLZ" arm64:"CLZ"
|
|
// mips:"CLZ"
|
|
// wasm:"I64Clz"
|
|
return bits.Len8(n)
|
|
}
|
|
|
|
// -------------------- //
|
|
// bits.OnesCount //
|
|
// -------------------- //
|
|
|
|
// TODO(register args) Restore a m d 6 4 :.*x86HasPOPCNT when only one ABI is tested.
|
|
func OnesCount(n uint) int {
|
|
// amd64:"POPCNTQ"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64:"POPCNTD"
|
|
// ppc64le:"POPCNTD"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount(n)
|
|
}
|
|
|
|
func OnesCount64(n uint64) int {
|
|
// amd64:"POPCNTQ"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64:"POPCNTD"
|
|
// ppc64le:"POPCNTD"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount64(n)
|
|
}
|
|
|
|
func OnesCount32(n uint32) int {
|
|
// amd64:"POPCNTL"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64:"POPCNTW"
|
|
// ppc64le:"POPCNTW"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount32(n)
|
|
}
|
|
|
|
func OnesCount16(n uint16) int {
|
|
// amd64:"POPCNTL"
|
|
// arm64:"VCNT","VUADDLV"
|
|
// s390x:"POPCNT"
|
|
// ppc64:"POPCNTW"
|
|
// ppc64le:"POPCNTW"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount16(n)
|
|
}
|
|
|
|
func OnesCount8(n uint8) int {
|
|
// s390x:"POPCNT"
|
|
// ppc64:"POPCNTB"
|
|
// ppc64le:"POPCNTB"
|
|
// wasm:"I64Popcnt"
|
|
return bits.OnesCount8(n)
|
|
}
|
|
|
|
// ----------------------- //
|
|
// bits.ReverseBytes //
|
|
// ----------------------- //
|
|
|
|
func ReverseBytes(n uint) uint {
|
|
// amd64:"BSWAPQ"
|
|
// s390x:"MOVDBR"
|
|
// arm64:"REV"
|
|
return bits.ReverseBytes(n)
|
|
}
|
|
|
|
func ReverseBytes64(n uint64) uint64 {
|
|
// amd64:"BSWAPQ"
|
|
// s390x:"MOVDBR"
|
|
// arm64:"REV"
|
|
return bits.ReverseBytes64(n)
|
|
}
|
|
|
|
func ReverseBytes32(n uint32) uint32 {
|
|
// amd64:"BSWAPL"
|
|
// s390x:"MOVWBR"
|
|
// arm64:"REVW"
|
|
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"
|
|
return bits.ReverseBytes16(n)
|
|
}
|
|
|
|
// --------------------- //
|
|
// bits.RotateLeft //
|
|
// --------------------- //
|
|
|
|
func RotateLeft64(n uint64) uint64 {
|
|
// amd64:"ROLQ"
|
|
// arm64:"ROR"
|
|
// ppc64:"ROTL"
|
|
// ppc64le:"ROTL"
|
|
// 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"
|
|
// ppc64:"ROTLW"
|
|
// ppc64le:"ROTLW"
|
|
// s390x:"RLL"
|
|
// wasm:"I32Rotl"
|
|
return bits.RotateLeft32(n, 9)
|
|
}
|
|
|
|
func RotateLeft16(n uint16) uint16 {
|
|
// amd64:"ROLW" 386:"ROLW"
|
|
return bits.RotateLeft16(n, 5)
|
|
}
|
|
|
|
func RotateLeft8(n uint8) uint8 {
|
|
// amd64:"ROLB" 386:"ROLB"
|
|
return bits.RotateLeft8(n, 5)
|
|
}
|
|
|
|
func RotateLeftVariable(n uint, m int) uint {
|
|
// amd64:"ROLQ"
|
|
// arm64:"ROR"
|
|
// ppc64:"ROTL"
|
|
// ppc64le:"ROTL"
|
|
// s390x:"RLLG"
|
|
// wasm:"I64Rotl"
|
|
return bits.RotateLeft(n, m)
|
|
}
|
|
|
|
func RotateLeftVariable64(n uint64, m int) uint64 {
|
|
// amd64:"ROLQ"
|
|
// arm64:"ROR"
|
|
// ppc64:"ROTL"
|
|
// ppc64le:"ROTL"
|
|
// 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"
|
|
// ppc64:"ROTLW"
|
|
// ppc64le:"ROTLW"
|
|
// s390x:"RLL"
|
|
// wasm:"I32Rotl"
|
|
return bits.RotateLeft32(n, m)
|
|
}
|
|
|
|
// ------------------------ //
|
|
// bits.TrailingZeros //
|
|
// ------------------------ //
|
|
|
|
func TrailingZeros(n uint) int {
|
|
// amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ"
|
|
// arm:"CLZ"
|
|
// arm64:"RBIT","CLZ"
|
|
// s390x:"FLOGR"
|
|
// ppc64/power8:"ANDN","POPCNTD"
|
|
// ppc64le/power8:"ANDN","POPCNTD"
|
|
// ppc64/power9: "CNTTZD"
|
|
// ppc64le/power9: "CNTTZD"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros(n)
|
|
}
|
|
|
|
func TrailingZeros64(n uint64) int {
|
|
// amd64:"BSFQ","MOVL\t\\$64","CMOVQEQ"
|
|
// arm64:"RBIT","CLZ"
|
|
// s390x:"FLOGR"
|
|
// ppc64/power8:"ANDN","POPCNTD"
|
|
// ppc64le/power8:"ANDN","POPCNTD"
|
|
// ppc64/power9: "CNTTZD"
|
|
// ppc64le/power9: "CNTTZD"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros64(n)
|
|
}
|
|
|
|
func TrailingZeros64Subtract(n uint64) int {
|
|
// ppc64le/power8:"NEG","SUBC","ANDN","POPCNTD"
|
|
// ppc64le/power9:"SUBC","CNTTZD"
|
|
return bits.TrailingZeros64(1 - n)
|
|
}
|
|
|
|
func TrailingZeros32(n uint32) int {
|
|
// amd64:"BTSQ\\t\\$32","BSFQ"
|
|
// arm:"CLZ"
|
|
// arm64:"RBITW","CLZW"
|
|
// s390x:"FLOGR","MOVWZ"
|
|
// ppc64/power8:"ANDN","POPCNTW"
|
|
// ppc64le/power8:"ANDN","POPCNTW"
|
|
// ppc64/power9: "CNTTZW"
|
|
// ppc64le/power9: "CNTTZW"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros32(n)
|
|
}
|
|
|
|
func TrailingZeros16(n uint16) int {
|
|
// amd64:"BSFL","BTSL\\t\\$16"
|
|
// 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"
|
|
// ppc64/power8:"POPCNTD","OR\\t\\$65536"
|
|
// ppc64le/power8:"POPCNTD","OR\\t\\$65536"
|
|
// ppc64/power9:"CNTTZD","OR\\t\\$65536"
|
|
// ppc64le/power9:"CNTTZD","OR\\t\\$65536"
|
|
// wasm:"I64Ctz"
|
|
return bits.TrailingZeros16(n)
|
|
}
|
|
|
|
func TrailingZeros8(n uint8) int {
|
|
// amd64:"BSFL","BTSL\\t\\$8"
|
|
// 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:"BSFQ",-"CMOVEQ"
|
|
i += bits.TrailingZeros(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits64(n uint64) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64:"BSFQ",-"CMOVEQ"
|
|
i += bits.TrailingZeros64(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits32(n uint32) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64:"BSFL",-"BTSQ"
|
|
i += bits.TrailingZeros32(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits16(n uint16) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64:"BSFL",-"BTSL"
|
|
// arm64:"RBITW","CLZW",-"ORR"
|
|
i += bits.TrailingZeros16(n)
|
|
n &= n - 1
|
|
}
|
|
return i
|
|
}
|
|
|
|
func IterateBits8(n uint8) int {
|
|
i := 0
|
|
for n != 0 {
|
|
// amd64:"BSFL",-"BTSL"
|
|
// 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"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
return bits.Add(x, y, ci)
|
|
}
|
|
|
|
func AddC(x, ci uint) (r, co uint) {
|
|
// arm64:"ADDS","ADCS","ADC",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ","SBBQ","NEGQ"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
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"
|
|
// s390x:"ADDC",-"ADDC\t[$]-1,"
|
|
return bits.Add(x, y, 0)
|
|
}
|
|
|
|
func AddR(x, y, ci uint) uint {
|
|
// arm64:"ADDS","ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
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[$]-1,"
|
|
r[1], c = bits.Add(p[1], q[1], c)
|
|
r[2], c = bits.Add(p[2], q[2], c)
|
|
}
|
|
|
|
func Add64(x, y, ci uint64) (r, co uint64) {
|
|
// arm64:"ADDS","ADCS","ADC",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ","SBBQ","NEGQ"
|
|
// ppc64: "ADDC", "ADDE", "ADDZE"
|
|
// ppc64le: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
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"
|
|
// ppc64: "ADDC", "ADDE", "ADDZE"
|
|
// ppc64le: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
return bits.Add64(x, 7, ci)
|
|
}
|
|
|
|
func Add64Z(x, y uint64) (r, co uint64) {
|
|
// arm64:"ADDS","ADC",-"ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"ADDQ","SBBQ","NEGQ",-"NEGL",-"ADCQ"
|
|
// ppc64: "ADDC", "ADDE", "ADDZE"
|
|
// ppc64le: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDC",-"ADDC\t[$]-1,"
|
|
return bits.Add64(x, y, 0)
|
|
}
|
|
|
|
func Add64R(x, y, ci uint64) uint64 {
|
|
// arm64:"ADDS","ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"NEGL","ADCQ",-"SBBQ",-"NEGQ"
|
|
// ppc64: "ADDC", "ADDE", "ADDZE"
|
|
// ppc64le: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE","ADDC\t[$]-1,"
|
|
r, _ := bits.Add64(x, y, ci)
|
|
return r
|
|
}
|
|
func Add64M(p, q, r *[3]uint64) {
|
|
var c uint64
|
|
r[0], c = bits.Add64(p[0], q[0], c)
|
|
// arm64:"ADCS",-"ADD\t",-"CMP"
|
|
// amd64:"ADCQ",-"NEGL",-"SBBQ",-"NEGQ"
|
|
// ppc64: "ADDC", "ADDE", "ADDZE"
|
|
// ppc64le: "ADDC", "ADDE", "ADDZE"
|
|
// s390x:"ADDE",-"ADDC\t[$]-1,"
|
|
r[1], c = bits.Add64(p[1], q[1], c)
|
|
r[2], c = bits.Add64(p[2], q[2], c)
|
|
}
|
|
|
|
func 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
|
|
}
|
|
|
|
// --------------- //
|
|
// bits.Sub* //
|
|
// --------------- //
|
|
|
|
func Sub(x, y, ci uint) (r, co uint) {
|
|
// amd64:"NEGL","SBBQ","NEGQ"
|
|
// arm64:"NEGS","SBCS","NGC","NEG",-"ADD",-"SUB",-"CMP"
|
|
// s390x:"SUBE"
|
|
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"
|
|
// s390x:"SUBE"
|
|
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"
|
|
// s390x:"SUBC"
|
|
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"
|
|
// s390x:"SUBE"
|
|
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"
|
|
// 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"
|
|
// s390x:"SUBE"
|
|
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"
|
|
// s390x:"SUBE"
|
|
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"
|
|
// s390x:"SUBC"
|
|
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"
|
|
// s390x:"SUBE"
|
|
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 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"
|
|
// ppc64:"MULHDU","MULLD"
|
|
// ppc64le:"MULHDU","MULLD"
|
|
// s390x:"MLGR"
|
|
// mips64: "MULVU"
|
|
return bits.Mul(x, y)
|
|
}
|
|
|
|
func Mul64(x, y uint64) (hi, lo uint64) {
|
|
// amd64:"MULQ"
|
|
// arm64:"UMULH","MUL"
|
|
// ppc64:"MULHDU","MULLD"
|
|
// ppc64le:"MULHDU","MULLD"
|
|
// s390x:"MLGR"
|
|
// mips64: "MULVU"
|
|
// riscv64:"MULHU","MUL"
|
|
return bits.Mul64(x, y)
|
|
}
|
|
|
|
// --------------- //
|
|
// 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)
|
|
}
|