golang.org/x/arch@v0.17.0/riscv64/riscv64asm/decode_test.go (about)

     1  // Copyright 2024 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package riscv64asm
     6  
     7  import (
     8  	"bufio"
     9  	"encoding/hex"
    10  	"os"
    11  	"path/filepath"
    12  	"strings"
    13  	"testing"
    14  )
    15  
    16  func testDecode(t *testing.T, syntax string) {
    17  	input := filepath.Join("testdata", syntax+"cases.txt")
    18  	f, err := os.Open(input)
    19  	if err != nil {
    20  		t.Fatal(err)
    21  	}
    22  	defer f.Close()
    23  	scanner := bufio.NewScanner(f)
    24  	for scanner.Scan() {
    25  		line := strings.TrimSpace(scanner.Text())
    26  		if line == "" || strings.HasPrefix(line, "#") {
    27  			continue
    28  		}
    29  		f := strings.SplitN(line, "\t", 2)
    30  		i := strings.Index(f[0], "|")
    31  
    32  		if i < 0 {
    33  			t.Errorf("parsing %q: missing | separator", f[0])
    34  			continue
    35  		}
    36  		if i%2 != 0 {
    37  			t.Errorf("parsing %q: misaligned | separator", f[0])
    38  		}
    39  		code, err := hex.DecodeString(f[0][:i] + f[0][i+1:])
    40  		if err != nil {
    41  			t.Errorf("parsing %q: %v", f[0], err)
    42  			continue
    43  		}
    44  		asm0 := strings.Replace(f[1], "	", " ", -1)
    45  		asm := strings.TrimSpace(asm0)
    46  		inst, decodeErr := Decode(code)
    47  		if decodeErr != nil && decodeErr != errUnknown {
    48  			if asm == "illegalins" && decodeErr == errShort {
    49  				continue
    50  			}
    51  			// Some rarely used system instructions are not supported
    52  			// Following logicals will filter such unknown instructions
    53  			t.Errorf("parsing %x: %s", code, decodeErr)
    54  			continue
    55  		}
    56  
    57  		var out string
    58  		switch syntax {
    59  		case "gnu":
    60  			out = GNUSyntax(inst)
    61  		case "plan9":
    62  			out = GoSyntax(inst, 0, nil, nil)
    63  		default:
    64  			t.Errorf("unknown syntax %q", syntax)
    65  			continue
    66  		}
    67  
    68  		if asm != out {
    69  			t.Errorf("Decode(%s) [%s] = %s want %s", f[0], syntax, out, asm)
    70  		}
    71  	}
    72  }
    73  
    74  func TestDecodeGNUSyntax(t *testing.T) {
    75  	testDecode(t, "gnu")
    76  }
    77  
    78  func TestDecodeGoSyntax(t *testing.T) {
    79  	testDecode(t, "plan9")
    80  }