File size: 5,534 Bytes
d7a5f2f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 | // Copyright 2023 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 loong64
import (
"bytes"
"fmt"
"internal/testenv"
"os"
"path/filepath"
"regexp"
"runtime"
"testing"
)
const genBufSize = (1024 * 1024 * 32) // 32MB
// TestLargeBranch generates a large function with a very far conditional
// branch, in order to ensure that it assembles successfully.
func TestLargeBranch(t *testing.T) {
if testing.Short() {
t.Skip("Skipping test in short mode")
}
testenv.MustHaveGoBuild(t)
dir := t.TempDir()
// Generate a very large function.
buf := bytes.NewBuffer(make([]byte, 0, genBufSize))
genLargeBranch(buf)
tmpfile := filepath.Join(dir, "x.s")
if err := os.WriteFile(tmpfile, buf.Bytes(), 0644); err != nil {
t.Fatalf("Failed to write file: %v", err)
}
// Assemble generated file.
cmd := testenv.Command(t, testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile)
cmd.Env = append(os.Environ(), "GOARCH=loong64", "GOOS=linux")
out, err := cmd.CombinedOutput()
if err != nil {
t.Errorf("Build failed: %v, output: %s", err, out)
}
}
func genLargeBranch(buf *bytes.Buffer) {
genSize1 := (1 << 16) + 16
genSize2 := (1 << 21) + 16
fmt.Fprintln(buf, "TEXT f(SB),0,$0-0")
fmt.Fprintln(buf, "BEQ R5, R6, label18")
fmt.Fprintln(buf, "BNE R5, R6, label18")
fmt.Fprintln(buf, "BGE R5, R6, label18")
fmt.Fprintln(buf, "BGEU R5, R6, label18")
fmt.Fprintln(buf, "BLTU R5, R6, label18")
fmt.Fprintln(buf, "BLEZ R5, label18")
fmt.Fprintln(buf, "BGEZ R5, label18")
fmt.Fprintln(buf, "BLTZ R5, label18")
fmt.Fprintln(buf, "BGTZ R5, label18")
fmt.Fprintln(buf, "BFPT label23")
fmt.Fprintln(buf, "BFPF label23")
fmt.Fprintln(buf, "BEQ R5, label23")
fmt.Fprintln(buf, "BNE R5, label23")
for i := 0; i <= genSize1; i++ {
fmt.Fprintln(buf, "ADDV $0, R0, R0")
}
fmt.Fprintln(buf, "label18:")
for i := 0; i <= (genSize2 - genSize1); i++ {
fmt.Fprintln(buf, "ADDV $0, R0, R0")
}
fmt.Fprintln(buf, "label23:")
fmt.Fprintln(buf, "ADDV $0, R0, R0")
fmt.Fprintln(buf, "RET")
}
// TestPCALIGN verifies the correctness of the PCALIGN by checking if the
// code can be aligned to the alignment value.
func TestPCALIGN(t *testing.T) {
testenv.MustHaveGoBuild(t)
dir := t.TempDir()
tmpfile := filepath.Join(dir, "testpcalign.s")
tmpout := filepath.Join(dir, "testpcalign.o")
code1 := []byte("TEXT 路foo(SB),$0-0\nMOVW $0, R0\nPCALIGN $8\nADDV $8, R0\nRET\n")
code2 := []byte("TEXT 路foo(SB),$0-0\nMOVW $0, R0\nPCALIGN $16\nADDV $16, R0\nRET\n")
code3 := []byte("TEXT 路foo(SB),$0-0\nMOVW $0, R0\nPCALIGN $32\nADDV $32, R0\nRET\n")
out1 := `0x0008\s00008\s\(.*\)\s*ADDV\s\$8,\sR0`
out2 := `0x0010\s00016\s\(.*\)\s*ADDV\s\$16,\sR0`
out3 := `0x0020\s00032\s\(.*\)\s*ADDV\s\$32,\sR0`
var testCases = []struct {
name string
source []byte
want string
}{
{"pcalign8", code1, out1},
{"pcalign16", code2, out2},
{"pcalign32", code3, out3},
}
for _, test := range testCases {
if err := os.WriteFile(tmpfile, test.source, 0644); err != nil {
t.Fatal(err)
}
cmd := testenv.Command(t, testenv.GoToolPath(t), "tool", "asm", "-S", "-o", tmpout, tmpfile)
cmd.Env = append(os.Environ(), "GOARCH=loong64", "GOOS=linux")
out, err := cmd.CombinedOutput()
if err != nil {
t.Errorf("The %s build failed: %v, output: %s", test.name, err, out)
continue
}
matched, err := regexp.MatchString(test.want, string(out))
if err != nil {
t.Fatal(err)
}
if !matched {
t.Errorf("The %s testing failed!\ninput: %s\noutput: %s\n", test.name, test.source, out)
}
}
}
func TestNoRet(t *testing.T) {
dir := t.TempDir()
tmpfile := filepath.Join(dir, "testnoret.s")
tmpout := filepath.Join(dir, "testnoret.o")
if err := os.WriteFile(tmpfile, []byte("TEXT 路foo(SB),$0-0\nNOP\n"), 0644); err != nil {
t.Fatal(err)
}
cmd := testenv.Command(t, testenv.GoToolPath(t), "tool", "asm", "-o", tmpout, tmpfile)
cmd.Env = append(os.Environ(), "GOARCH=loong64", "GOOS=linux")
if out, err := cmd.CombinedOutput(); err != nil {
t.Errorf("%v\n%s", err, out)
}
}
func TestLargeCall(t *testing.T) {
if testing.Short() {
t.Skip("Skipping test in short mode")
}
if runtime.GOARCH != "loong64" {
t.Skip("Require loong64 to run")
}
testenv.MustHaveGoBuild(t)
dir := t.TempDir()
if err := os.WriteFile(filepath.Join(dir, "go.mod"), []byte("module largecall"), 0644); err != nil {
t.Fatalf("Failed to write file: %v\n", err)
}
main := `package main
func main() {
a()
}
func a()
`
if err := os.WriteFile(filepath.Join(dir, "largecall.go"), []byte(main), 0644); err != nil {
t.Fatalf("failed to write main: %v\n", err)
}
// Generate a very large call instruction.
buf := bytes.NewBuffer(make([]byte, 0, 7000000))
genLargeCall(buf)
if err := os.WriteFile(filepath.Join(dir, "largecall.s"), buf.Bytes(), 0644); err != nil {
t.Fatalf("Failed to write file: %v\n", err)
}
// Build generated files.
cmd := testenv.Command(t, testenv.GoToolPath(t), "build")
cmd.Dir = dir
out, err := cmd.CombinedOutput()
if err != nil {
t.Errorf("Build failed: %v, output: %s", err, out)
}
}
func genLargeCall(buf *bytes.Buffer) {
fmt.Fprintln(buf, "TEXT main路a(SB),0,$0-8")
fmt.Fprintln(buf, "CALL b(SB)")
for i := 0; i <= ((1 << 26) + 26); i++ {
fmt.Fprintln(buf, "ADDV $0, R0, R0")
}
fmt.Fprintln(buf, "RET")
fmt.Fprintln(buf, "TEXT b(SB),0,$0-8")
fmt.Fprintln(buf, "ADDV $0, R0, R0")
fmt.Fprintln(buf, "RET")
}
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