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path: root/src/runtime/memmove_test.go
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-rw-r--r--src/runtime/memmove_test.go295
1 files changed, 295 insertions, 0 deletions
diff --git a/src/runtime/memmove_test.go b/src/runtime/memmove_test.go
new file mode 100644
index 000000000..ffda4fe6c
--- /dev/null
+++ b/src/runtime/memmove_test.go
@@ -0,0 +1,295 @@
+// Copyright 2013 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 runtime_test
+
+import (
+ . "runtime"
+ "testing"
+)
+
+func TestMemmove(t *testing.T) {
+ size := 256
+ if testing.Short() {
+ size = 128 + 16
+ }
+ src := make([]byte, size)
+ dst := make([]byte, size)
+ for i := 0; i < size; i++ {
+ src[i] = byte(128 + (i & 127))
+ }
+ for i := 0; i < size; i++ {
+ dst[i] = byte(i & 127)
+ }
+ for n := 0; n <= size; n++ {
+ for x := 0; x <= size-n; x++ { // offset in src
+ for y := 0; y <= size-n; y++ { // offset in dst
+ copy(dst[y:y+n], src[x:x+n])
+ for i := 0; i < y; i++ {
+ if dst[i] != byte(i&127) {
+ t.Fatalf("prefix dst[%d] = %d", i, dst[i])
+ }
+ }
+ for i := y; i < y+n; i++ {
+ if dst[i] != byte(128+((i-y+x)&127)) {
+ t.Fatalf("copied dst[%d] = %d", i, dst[i])
+ }
+ dst[i] = byte(i & 127) // reset dst
+ }
+ for i := y + n; i < size; i++ {
+ if dst[i] != byte(i&127) {
+ t.Fatalf("suffix dst[%d] = %d", i, dst[i])
+ }
+ }
+ }
+ }
+ }
+}
+
+func TestMemmoveAlias(t *testing.T) {
+ size := 256
+ if testing.Short() {
+ size = 128 + 16
+ }
+ buf := make([]byte, size)
+ for i := 0; i < size; i++ {
+ buf[i] = byte(i)
+ }
+ for n := 0; n <= size; n++ {
+ for x := 0; x <= size-n; x++ { // src offset
+ for y := 0; y <= size-n; y++ { // dst offset
+ copy(buf[y:y+n], buf[x:x+n])
+ for i := 0; i < y; i++ {
+ if buf[i] != byte(i) {
+ t.Fatalf("prefix buf[%d] = %d", i, buf[i])
+ }
+ }
+ for i := y; i < y+n; i++ {
+ if buf[i] != byte(i-y+x) {
+ t.Fatalf("copied buf[%d] = %d", i, buf[i])
+ }
+ buf[i] = byte(i) // reset buf
+ }
+ for i := y + n; i < size; i++ {
+ if buf[i] != byte(i) {
+ t.Fatalf("suffix buf[%d] = %d", i, buf[i])
+ }
+ }
+ }
+ }
+ }
+}
+
+func bmMemmove(b *testing.B, n int) {
+ x := make([]byte, n)
+ y := make([]byte, n)
+ b.SetBytes(int64(n))
+ for i := 0; i < b.N; i++ {
+ copy(x, y)
+ }
+}
+
+func BenchmarkMemmove0(b *testing.B) { bmMemmove(b, 0) }
+func BenchmarkMemmove1(b *testing.B) { bmMemmove(b, 1) }
+func BenchmarkMemmove2(b *testing.B) { bmMemmove(b, 2) }
+func BenchmarkMemmove3(b *testing.B) { bmMemmove(b, 3) }
+func BenchmarkMemmove4(b *testing.B) { bmMemmove(b, 4) }
+func BenchmarkMemmove5(b *testing.B) { bmMemmove(b, 5) }
+func BenchmarkMemmove6(b *testing.B) { bmMemmove(b, 6) }
+func BenchmarkMemmove7(b *testing.B) { bmMemmove(b, 7) }
+func BenchmarkMemmove8(b *testing.B) { bmMemmove(b, 8) }
+func BenchmarkMemmove9(b *testing.B) { bmMemmove(b, 9) }
+func BenchmarkMemmove10(b *testing.B) { bmMemmove(b, 10) }
+func BenchmarkMemmove11(b *testing.B) { bmMemmove(b, 11) }
+func BenchmarkMemmove12(b *testing.B) { bmMemmove(b, 12) }
+func BenchmarkMemmove13(b *testing.B) { bmMemmove(b, 13) }
+func BenchmarkMemmove14(b *testing.B) { bmMemmove(b, 14) }
+func BenchmarkMemmove15(b *testing.B) { bmMemmove(b, 15) }
+func BenchmarkMemmove16(b *testing.B) { bmMemmove(b, 16) }
+func BenchmarkMemmove32(b *testing.B) { bmMemmove(b, 32) }
+func BenchmarkMemmove64(b *testing.B) { bmMemmove(b, 64) }
+func BenchmarkMemmove128(b *testing.B) { bmMemmove(b, 128) }
+func BenchmarkMemmove256(b *testing.B) { bmMemmove(b, 256) }
+func BenchmarkMemmove512(b *testing.B) { bmMemmove(b, 512) }
+func BenchmarkMemmove1024(b *testing.B) { bmMemmove(b, 1024) }
+func BenchmarkMemmove2048(b *testing.B) { bmMemmove(b, 2048) }
+func BenchmarkMemmove4096(b *testing.B) { bmMemmove(b, 4096) }
+
+func TestMemclr(t *testing.T) {
+ size := 512
+ if testing.Short() {
+ size = 128 + 16
+ }
+ mem := make([]byte, size)
+ for i := 0; i < size; i++ {
+ mem[i] = 0xee
+ }
+ for n := 0; n < size; n++ {
+ for x := 0; x <= size-n; x++ { // offset in mem
+ MemclrBytes(mem[x : x+n])
+ for i := 0; i < x; i++ {
+ if mem[i] != 0xee {
+ t.Fatalf("overwrite prefix mem[%d] = %d", i, mem[i])
+ }
+ }
+ for i := x; i < x+n; i++ {
+ if mem[i] != 0 {
+ t.Fatalf("failed clear mem[%d] = %d", i, mem[i])
+ }
+ mem[i] = 0xee
+ }
+ for i := x + n; i < size; i++ {
+ if mem[i] != 0xee {
+ t.Fatalf("overwrite suffix mem[%d] = %d", i, mem[i])
+ }
+ }
+ }
+ }
+}
+
+func bmMemclr(b *testing.B, n int) {
+ x := make([]byte, n)
+ b.SetBytes(int64(n))
+ for i := 0; i < b.N; i++ {
+ MemclrBytes(x)
+ }
+}
+func BenchmarkMemclr5(b *testing.B) { bmMemclr(b, 5) }
+func BenchmarkMemclr16(b *testing.B) { bmMemclr(b, 16) }
+func BenchmarkMemclr64(b *testing.B) { bmMemclr(b, 64) }
+func BenchmarkMemclr256(b *testing.B) { bmMemclr(b, 256) }
+func BenchmarkMemclr4096(b *testing.B) { bmMemclr(b, 4096) }
+func BenchmarkMemclr65536(b *testing.B) { bmMemclr(b, 65536) }
+
+func BenchmarkClearFat8(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [8 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat12(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [12 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat16(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [16 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat24(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [24 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat32(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [32 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat64(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [64 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat128(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [128 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat256(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [256 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat512(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [512 / 4]uint32
+ _ = x
+ }
+}
+func BenchmarkClearFat1024(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ var x [1024 / 4]uint32
+ _ = x
+ }
+}
+
+func BenchmarkCopyFat8(b *testing.B) {
+ var x [8 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat12(b *testing.B) {
+ var x [12 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat16(b *testing.B) {
+ var x [16 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat24(b *testing.B) {
+ var x [24 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat32(b *testing.B) {
+ var x [32 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat64(b *testing.B) {
+ var x [64 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat128(b *testing.B) {
+ var x [128 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat256(b *testing.B) {
+ var x [256 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat512(b *testing.B) {
+ var x [512 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
+func BenchmarkCopyFat1024(b *testing.B) {
+ var x [1024 / 4]uint32
+ for i := 0; i < b.N; i++ {
+ y := x
+ _ = y
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-03 05:27:36 +0000