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gcc/libgo/go/runtime/memmove_test.go
Ian Lance Taylor f8d9fa9e80 libgo, compiler: Upgrade libgo to Go 1.4, except for runtime. 
This upgrades all of libgo other than the runtime package to
the Go 1.4 release.  In Go 1.4 much of the runtime was
rewritten into Go.  Merging that code will take more time and
will not change the API, so I'm putting it off for now.

There are a few runtime changes anyhow, to accomodate other
packages that rely on minor modifications to the runtime
support.

The compiler changes slightly to add a one-bit flag to each
type descriptor kind that is stored directly in an interface,
which for gccgo is currently only pointer types.  Another
one-bit flag (gcprog) is reserved because it is used by the gc
compiler, but gccgo does not currently use it.

There is another error check in the compiler since I ran
across it during testing.

gotools/:
	* Makefile.am (go_cmd_go_files): Sort entries.  Add generate.go.
	* Makefile.in: Rebuild.

From-SVN: r219627
2015-01-15 00:27:56 +00:00

296 lines
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// 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
}
}
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