mirror of
https://github.com/golang/go
synced 2024-11-17 14:34:46 -07:00
c042fedbc8
This CL adds several test cases of arithmetic operations for 386/amd64/arm/arm64. Change-Id: I362687c06249f31091458a1d8c45fc4d006b616a Reviewed-on: https://go-review.googlesource.com/c/151897 Run-TryBot: Ben Shi <powerman1st@163.com> Reviewed-by: Keith Randall <khr@golang.org>
383 lines
8.4 KiB
Go
383 lines
8.4 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
|
|
|
|
// This file contains codegen tests related to arithmetic
|
|
// simplifications and optimizations on integer types.
|
|
// For codegen tests on float types, see floats.go.
|
|
|
|
// ----------------- //
|
|
// Subtraction //
|
|
// ----------------- //
|
|
|
|
var ef int
|
|
func SubMem(arr []int, b, c, d int) int {
|
|
// 386:`SUBL\s[A-Z]+,\s8\([A-Z]+\)`
|
|
// amd64:`SUBQ\s[A-Z]+,\s16\([A-Z]+\)`
|
|
arr[2] -= b
|
|
// 386:`SUBL\s[A-Z]+,\s12\([A-Z]+\)`
|
|
// amd64:`SUBQ\s[A-Z]+,\s24\([A-Z]+\)`
|
|
arr[3] -= b
|
|
// 386:`DECL\s16\([A-Z]+\)`
|
|
arr[4]--
|
|
// 386:`ADDL\s[$]-20,\s20\([A-Z]+\)`
|
|
arr[5] -= 20
|
|
// 386:`SUBL\s\([A-Z]+\)\([A-Z]+\*4\),\s[A-Z]+`
|
|
ef -= arr[b]
|
|
// 386:`SUBL\s[A-Z]+,\s\([A-Z]+\)\([A-Z]+\*4\)`
|
|
arr[c] -= b
|
|
// 386:`ADDL\s[$]-15,\s\([A-Z]+\)\([A-Z]+\*4\)`
|
|
arr[d] -= 15
|
|
// 386:`DECL\s\([A-Z]+\)\([A-Z]+\*4\)`
|
|
arr[b]--
|
|
// amd64:`DECQ\s64\([A-Z]+\)`
|
|
arr[8]--
|
|
// 386:"SUBL\t4"
|
|
// amd64:"SUBQ\t8"
|
|
return arr[0] - arr[1]
|
|
}
|
|
|
|
// -------------------- //
|
|
// Multiplication //
|
|
// -------------------- //
|
|
|
|
func Pow2Muls(n1, n2 int) (int, int) {
|
|
// amd64:"SHLQ\t[$]5",-"IMULQ"
|
|
// 386:"SHLL\t[$]5",-"IMULL"
|
|
// arm:"SLL\t[$]5",-"MUL"
|
|
// arm64:"LSL\t[$]5",-"MUL"
|
|
// ppc64:"SLD\t[$]5",-"MUL"
|
|
// ppc64le:"SLD\t[$]5",-"MUL"
|
|
a := n1 * 32
|
|
|
|
// amd64:"SHLQ\t[$]6",-"IMULQ"
|
|
// 386:"SHLL\t[$]6",-"IMULL"
|
|
// arm:"SLL\t[$]6",-"MUL"
|
|
// arm64:`NEG\sR[0-9]+<<6,\sR[0-9]+`,-`LSL`,-`MUL`
|
|
// ppc64:"SLD\t[$]6","NEG\\sR[0-9]+,\\sR[0-9]+",-"MUL"
|
|
// ppc64le:"SLD\t[$]6","NEG\\sR[0-9]+,\\sR[0-9]+",-"MUL"
|
|
b := -64 * n2
|
|
|
|
return a, b
|
|
}
|
|
|
|
func Mul_96(n int) int {
|
|
// amd64:`SHLQ\t[$]5`,`LEAQ\t\(.*\)\(.*\*2\),`,-`IMULQ`
|
|
// 386:`SHLL\t[$]5`,`LEAL\t\(.*\)\(.*\*2\),`,-`IMULL`
|
|
// arm64:`LSL\t[$]5`,`ADD\sR[0-9]+<<1,\sR[0-9]+`,-`MUL`
|
|
// arm:`SLL\t[$]5`,`ADD\sR[0-9]+<<1,\sR[0-9]+`,-`MUL`
|
|
return n * 96
|
|
}
|
|
|
|
func MulMemSrc(a []uint32, b []float32) {
|
|
// 386:`IMULL\s4\([A-Z]+\),\s[A-Z]+`
|
|
a[0] *= a[1]
|
|
// 386/sse2:`MULSS\s4\([A-Z]+\),\sX[0-9]+`
|
|
// amd64:`MULSS\s4\([A-Z]+\),\sX[0-9]+`
|
|
b[0] *= b[1]
|
|
}
|
|
|
|
// Multiplications merging tests
|
|
|
|
func MergeMuls1(n int) int {
|
|
// amd64:"IMUL3Q\t[$]46"
|
|
// 386:"IMUL3L\t[$]46"
|
|
return 15*n + 31*n // 46n
|
|
}
|
|
|
|
func MergeMuls2(n int) int {
|
|
// amd64:"IMUL3Q\t[$]23","ADDQ\t[$]29"
|
|
// 386:"IMUL3L\t[$]23","ADDL\t[$]29"
|
|
return 5*n + 7*(n+1) + 11*(n+2) // 23n + 29
|
|
}
|
|
|
|
func MergeMuls3(a, n int) int {
|
|
// amd64:"ADDQ\t[$]19",-"IMULQ\t[$]19"
|
|
// 386:"ADDL\t[$]19",-"IMULL\t[$]19"
|
|
return a*n + 19*n // (a+19)n
|
|
}
|
|
|
|
func MergeMuls4(n int) int {
|
|
// amd64:"IMUL3Q\t[$]14"
|
|
// 386:"IMUL3L\t[$]14"
|
|
return 23*n - 9*n // 14n
|
|
}
|
|
|
|
func MergeMuls5(a, n int) int {
|
|
// amd64:"ADDQ\t[$]-19",-"IMULQ\t[$]19"
|
|
// 386:"ADDL\t[$]-19",-"IMULL\t[$]19"
|
|
return a*n - 19*n // (a-19)n
|
|
}
|
|
|
|
// -------------- //
|
|
// Division //
|
|
// -------------- //
|
|
|
|
func DivMemSrc(a []float64) {
|
|
// 386/sse2:`DIVSD\s8\([A-Z]+\),\sX[0-9]+`
|
|
// amd64:`DIVSD\s8\([A-Z]+\),\sX[0-9]+`
|
|
a[0] /= a[1]
|
|
}
|
|
|
|
func Pow2Divs(n1 uint, n2 int) (uint, int) {
|
|
// 386:"SHRL\t[$]5",-"DIVL"
|
|
// amd64:"SHRQ\t[$]5",-"DIVQ"
|
|
// arm:"SRL\t[$]5",-".*udiv"
|
|
// arm64:"LSR\t[$]5",-"UDIV"
|
|
// ppc64:"SRD"
|
|
// ppc64le:"SRD"
|
|
a := n1 / 32 // unsigned
|
|
|
|
// amd64:"SARQ\t[$]6",-"IDIVQ"
|
|
// 386:"SARL\t[$]6",-"IDIVL"
|
|
// arm:"SRA\t[$]6",-".*udiv"
|
|
// arm64:"ASR\t[$]6",-"SDIV"
|
|
// ppc64:"SRAD"
|
|
// ppc64le:"SRAD"
|
|
b := n2 / 64 // signed
|
|
|
|
return a, b
|
|
}
|
|
|
|
// Check that constant divisions get turned into MULs
|
|
func ConstDivs(n1 uint, n2 int) (uint, int) {
|
|
// amd64:"MOVQ\t[$]-1085102592571150095","MULQ",-"DIVQ"
|
|
// 386:"MOVL\t[$]-252645135","MULL",-"DIVL"
|
|
// arm64:`MOVD`,`UMULH`,-`DIV`
|
|
// arm:`MOVW`,`MUL`,-`.*udiv`
|
|
a := n1 / 17 // unsigned
|
|
|
|
// amd64:"MOVQ\t[$]-1085102592571150095","IMULQ",-"IDIVQ"
|
|
// 386:"MOVL\t[$]-252645135","IMULL",-"IDIVL"
|
|
// arm64:`MOVD`,`SMULH`,-`DIV`
|
|
// arm:`MOVW`,`MUL`,-`.*udiv`
|
|
b := n2 / 17 // signed
|
|
|
|
return a, b
|
|
}
|
|
|
|
func FloatDivs(a []float32) float32 {
|
|
// amd64:`DIVSS\s8\([A-Z]+\),\sX[0-9]+`
|
|
// 386/sse2:`DIVSS\s8\([A-Z]+\),\sX[0-9]+`
|
|
return a[1] / a[2]
|
|
}
|
|
|
|
func Pow2Mods(n1 uint, n2 int) (uint, int) {
|
|
// 386:"ANDL\t[$]31",-"DIVL"
|
|
// amd64:"ANDQ\t[$]31",-"DIVQ"
|
|
// arm:"AND\t[$]31",-".*udiv"
|
|
// arm64:"AND\t[$]31",-"UDIV"
|
|
// ppc64:"ANDCC\t[$]31"
|
|
// ppc64le:"ANDCC\t[$]31"
|
|
a := n1 % 32 // unsigned
|
|
|
|
// 386:-"IDIVL"
|
|
// amd64:-"IDIVQ"
|
|
// arm:-".*udiv"
|
|
// arm64:-"REM"
|
|
b := n2 % 64 // signed
|
|
|
|
return a, b
|
|
}
|
|
|
|
// Check that constant modulo divs get turned into MULs
|
|
func ConstMods(n1 uint, n2 int) (uint, int) {
|
|
// amd64:"MOVQ\t[$]-1085102592571150095","MULQ",-"DIVQ"
|
|
// 386:"MOVL\t[$]-252645135","MULL",-"DIVL"
|
|
// arm64:`MOVD`,`UMULH`,-`DIV`
|
|
// arm:`MOVW`,`MUL`,-`.*udiv`
|
|
a := n1 % 17 // unsigned
|
|
|
|
// amd64:"MOVQ\t[$]-1085102592571150095","IMULQ",-"IDIVQ"
|
|
// 386:"MOVL\t[$]-252645135","IMULL",-"IDIVL"
|
|
// arm64:`MOVD`,`SMULH`,-`DIV`
|
|
// arm:`MOVW`,`MUL`,-`.*udiv`
|
|
b := n2 % 17 // signed
|
|
|
|
return a, b
|
|
}
|
|
|
|
// Check that fix-up code is not generated for divisions where it has been proven that
|
|
// that the divisor is not -1 or that the dividend is > MinIntNN.
|
|
func NoFix64A(divr int64) (int64, int64) {
|
|
var d int64 = 42
|
|
var e int64 = 84
|
|
if divr > 5 {
|
|
d /= divr // amd64:-"JMP"
|
|
e %= divr // amd64:-"JMP"
|
|
}
|
|
return d, e
|
|
}
|
|
|
|
func NoFix64B(divd int64) (int64, int64) {
|
|
var d int64
|
|
var e int64
|
|
var divr int64 = -1
|
|
if divd > -9223372036854775808 {
|
|
d = divd / divr // amd64:-"JMP"
|
|
e = divd % divr // amd64:-"JMP"
|
|
}
|
|
return d, e
|
|
}
|
|
|
|
func NoFix32A(divr int32) (int32, int32) {
|
|
var d int32 = 42
|
|
var e int32 = 84
|
|
if divr > 5 {
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
d /= divr
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
e %= divr
|
|
}
|
|
return d, e
|
|
}
|
|
|
|
func NoFix32B(divd int32) (int32, int32) {
|
|
var d int32
|
|
var e int32
|
|
var divr int32 = -1
|
|
if divd > -2147483648 {
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
d = divd / divr
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
e = divd % divr
|
|
}
|
|
return d, e
|
|
}
|
|
|
|
func NoFix16A(divr int16) (int16, int16) {
|
|
var d int16 = 42
|
|
var e int16 = 84
|
|
if divr > 5 {
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
d /= divr
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
e %= divr
|
|
}
|
|
return d, e
|
|
}
|
|
|
|
func NoFix16B(divd int16) (int16, int16) {
|
|
var d int16
|
|
var e int16
|
|
var divr int16 = -1
|
|
if divd > -32768 {
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
d = divd / divr
|
|
// amd64:-"JMP"
|
|
// 386:-"JMP"
|
|
e = divd % divr
|
|
}
|
|
return d, e
|
|
}
|
|
|
|
// Check that len() and cap() calls divided by powers of two are
|
|
// optimized into shifts and ands
|
|
|
|
func LenDiv1(a []int) int {
|
|
// 386:"SHRL\t[$]10"
|
|
// amd64:"SHRQ\t[$]10"
|
|
// arm64:"LSR\t[$]10",-"SDIV"
|
|
// arm:"SRL\t[$]10",-".*udiv"
|
|
// ppc64:"SRD"\t[$]10"
|
|
// ppc64le:"SRD"\t[$]10"
|
|
return len(a) / 1024
|
|
}
|
|
|
|
func LenDiv2(s string) int {
|
|
// 386:"SHRL\t[$]11"
|
|
// amd64:"SHRQ\t[$]11"
|
|
// arm64:"LSR\t[$]11",-"SDIV"
|
|
// arm:"SRL\t[$]11",-".*udiv"
|
|
// ppc64:"SRD\t[$]11"
|
|
// ppc64le:"SRD\t[$]11"
|
|
return len(s) / (4097 >> 1)
|
|
}
|
|
|
|
func LenMod1(a []int) int {
|
|
// 386:"ANDL\t[$]1023"
|
|
// amd64:"ANDQ\t[$]1023"
|
|
// arm64:"AND\t[$]1023",-"SDIV"
|
|
// arm/6:"AND",-".*udiv"
|
|
// arm/7:"BFC",-".*udiv",-"AND"
|
|
// ppc64:"ANDCC\t[$]1023"
|
|
// ppc64le:"ANDCC\t[$]1023"
|
|
return len(a) % 1024
|
|
}
|
|
|
|
func LenMod2(s string) int {
|
|
// 386:"ANDL\t[$]2047"
|
|
// amd64:"ANDQ\t[$]2047"
|
|
// arm64:"AND\t[$]2047",-"SDIV"
|
|
// arm/6:"AND",-".*udiv"
|
|
// arm/7:"BFC",-".*udiv",-"AND"
|
|
// ppc64:"ANDCC\t[$]2047"
|
|
// ppc64le:"ANDCC\t[$]2047"
|
|
return len(s) % (4097 >> 1)
|
|
}
|
|
|
|
func CapDiv(a []int) int {
|
|
// 386:"SHRL\t[$]12"
|
|
// amd64:"SHRQ\t[$]12"
|
|
// arm64:"LSR\t[$]12",-"SDIV"
|
|
// arm:"SRL\t[$]12",-".*udiv"
|
|
// ppc64:"SRD\t[$]12"
|
|
// ppc64le:"SRD\t[$]12"
|
|
return cap(a) / ((1 << 11) + 2048)
|
|
}
|
|
|
|
func CapMod(a []int) int {
|
|
// 386:"ANDL\t[$]4095"
|
|
// amd64:"ANDQ\t[$]4095"
|
|
// arm64:"AND\t[$]4095",-"SDIV"
|
|
// arm/6:"AND",-".*udiv"
|
|
// arm/7:"BFC",-".*udiv",-"AND"
|
|
// ppc64:"ANDCC\t[$]4095"
|
|
// ppc64le:"ANDCC\t[$]4095"
|
|
return cap(a) % ((1 << 11) + 2048)
|
|
}
|
|
|
|
func AddMul(x int) int {
|
|
// amd64:"LEAQ\t1"
|
|
return 2*x + 1
|
|
}
|
|
|
|
func MULA(a, b, c uint32) (uint32, uint32, uint32) {
|
|
// arm:`MULA`,-`MUL\s`
|
|
// arm64:`MADDW`,-`MULW`
|
|
r0 := a*b + c
|
|
// arm:`MULA`,-`MUL\s`
|
|
// arm64:`MADDW`,-`MULW`
|
|
r1 := c*79 + a
|
|
// arm:`ADD`,-`MULA`,-`MUL\s`
|
|
// arm64:`ADD`,-`MADD`,-`MULW`
|
|
r2 := b*64 + c
|
|
return r0, r1, r2
|
|
}
|
|
|
|
func MULS(a, b, c uint32) (uint32, uint32, uint32) {
|
|
// arm/7:`MULS`,-`MUL\s`
|
|
// arm/6:`SUB`,`MUL\s`,-`MULS`
|
|
// arm64:`MSUBW`,-`MULW`
|
|
r0 := c - a*b
|
|
// arm/7:`MULS`,-`MUL\s`
|
|
// arm/6:`SUB`,`MUL\s`,-`MULS`
|
|
// arm64:`MSUBW`,-`MULW`
|
|
r1 := a - c*79
|
|
// arm/7:`SUB`,-`MULS`,-`MUL\s`
|
|
// arm64:`SUB`,-`MSUBW`,-`MULW`
|
|
r2 := c - b*64
|
|
return r0, r1, r2
|
|
}
|