Test array multiply.

galois_test.go

@@ -8,6 +8,7 @@
 package reedsolomon
 
 import (
+	"bytes"
 	"testing"
 )
 
@@ -126,6 +127,22 @@ func TestGalois(t *testing.T) {
 	if galMultiply(23, 45) != 41 {
 		t.Fatal("galMultiply(23, 45) != 41")
 	}
+
+	// Test slices (>16 entries to test assembler)
+	in := []byte{0, 1, 2, 3, 4, 5, 6, 10, 50, 100, 150, 174, 201, 255, 99, 32, 67, 85}
+	out := make([]byte, len(in))
+	galMulSlice(25, in, out)
+	expect := []byte{0x0, 0x19, 0x32, 0x2b, 0x64, 0x7d, 0x56, 0xfa, 0xb8, 0x6d, 0xc7, 0x85, 0xc3, 0x1f, 0x22, 0x7, 0x25, 0xfe}
+	if 0 != bytes.Compare(out, expect) {
+		t.Errorf("got %#v, expected %#v", out, expect)
+	}
+
+	galMulSlice(177, in, out)
+	expect = []byte{0x0, 0xb1, 0x7f, 0xce, 0xfe, 0x4f, 0x81, 0x9e, 0x3, 0x6, 0xe8, 0x75, 0xbd, 0x40, 0x36, 0xa3, 0x95, 0xcb}
+	if 0 != bytes.Compare(out, expect) {
+		t.Errorf("got %#v, expected %#v", out, expect)
+	}
+
 	if galExp(2, 2) != 4 {
 		t.Fatal("galExp(2, 2) != 4")
 	}