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// Copyright 2019 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 riscv
import (
"bytes"
"fmt"
"internal/testenv"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"testing"
)
// TestLarge generates a very large file to verify that large
// program builds successfully, in particular, too-far
// conditional branches are fixed.
func TestLarge(t *testing.T) {
if testing.Short() {
t.Skip("Skip in short mode")
}
testenv.MustHaveGoBuild(t)
dir, err := ioutil.TempDir("", "testlarge")
if err != nil {
t.Fatalf("could not create directory: %v", err)
}
defer os.RemoveAll(dir)
// Generate a very large function.
buf := bytes.NewBuffer(make([]byte, 0, 7000000))
gen(buf)
tmpfile := filepath.Join(dir, "x.s")
err = ioutil.WriteFile(tmpfile, buf.Bytes(), 0644)
if err != nil {
t.Fatalf("can't write output: %v\n", err)
}
// Build generated file.
cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile)
cmd.Env = append(os.Environ(), "GOARCH=riscv64", "GOOS=linux")
out, err := cmd.CombinedOutput()
if err != nil {
t.Errorf("Build failed: %v, output: %s", err, out)
}
}
// gen generates a very large program, with a very far conditional branch.
func gen(buf *bytes.Buffer) {
fmt.Fprintln(buf, "TEXT f(SB),0,$0-0")
fmt.Fprintln(buf, "BEQ X0, X0, label")
for i := 0; i < 1<<19; i++ {
fmt.Fprintln(buf, "ADD $0, X0, X0")
}
fmt.Fprintln(buf, "label:")
fmt.Fprintln(buf, "ADD $0, X0, X0")
}
// Issue 20348.
func TestNoRet(t *testing.T) {
dir, err := ioutil.TempDir("", "testnoret")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
tmpfile := filepath.Join(dir, "x.s")
if err := ioutil.WriteFile(tmpfile, []byte("TEXT ·stub(SB),$0-0\nNOP\n"), 0644); err != nil {
t.Fatal(err)
}
cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile)
cmd.Env = append(os.Environ(), "GOARCH=riscv64", "GOOS=linux")
if out, err := cmd.CombinedOutput(); err != nil {
t.Errorf("%v\n%s", err, out)
}
}
func TestImmediateSplitting(t *testing.T) {
dir, err := ioutil.TempDir("", "testimmsplit")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
tmpfile := filepath.Join(dir, "x.s")
asm := `
TEXT _stub(SB),$0-0
LB 4096(X5), X6
LH 4096(X5), X6
LW 4096(X5), X6
LD 4096(X5), X6
LBU 4096(X5), X6
LHU 4096(X5), X6
LWU 4096(X5), X6
SB X6, 4096(X5)
SH X6, 4096(X5)
SW X6, 4096(X5)
SD X6, 4096(X5)
FLW 4096(X5), F6
FLD 4096(X5), F6
FSW F6, 4096(X5)
FSD F6, 4096(X5)
MOVB 4096(X5), X6
MOVH 4096(X5), X6
MOVW 4096(X5), X6
MOV 4096(X5), X6
MOVBU 4096(X5), X6
MOVHU 4096(X5), X6
MOVWU 4096(X5), X6
MOVB X6, 4096(X5)
MOVH X6, 4096(X5)
MOVW X6, 4096(X5)
MOV X6, 4096(X5)
MOVF 4096(X5), F6
MOVD 4096(X5), F6
MOVF F6, 4096(X5)
MOVD F6, 4096(X5)
`
if err := ioutil.WriteFile(tmpfile, []byte(asm), 0644); err != nil {
t.Fatal(err)
}
cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile)
cmd.Env = append(os.Environ(), "GOARCH=riscv64", "GOOS=linux")
if out, err := cmd.CombinedOutput(); err != nil {
t.Errorf("%v\n%s", err, out)
}
}
func TestBranch(t *testing.T) {
if testing.Short() {
t.Skip("Skipping in short mode")
}
if runtime.GOARCH != "riscv64" {
t.Skip("Requires riscv64 to run")
}
testenv.MustHaveGoBuild(t)
cmd := exec.Command(testenv.GoToolPath(t), "test")
cmd.Dir = "testdata/testbranch"
if out, err := testenv.CleanCmdEnv(cmd).CombinedOutput(); err != nil {
t.Errorf("Branch test failed: %v\n%s", err, out)
}
}
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