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diff --git a/go.mod b/go.mod
index 0218cda68873c5adeb5c4767836308a203965fb8..e94afe91c2f58ff5f1e28e009c67a7bbd24f7932 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
module git.sr.ht/~poldi1405/go-yenc
go 1.16
+
+require github.com/yesuu/simd v0.0.0-20170211141659-3bd2f7eb4d94 // indirect
diff --git a/go.sum b/go.sum
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..c3d5144a83b92d3cb9429caf5176e69ff108a494 100644
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/yesuu/simd v0.0.0-20170211141659-3bd2f7eb4d94 h1:EpeLHaKDpirS2DHEdn/5KWq88LRrSQ36yMtFBo8yzc0=
+github.com/yesuu/simd v0.0.0-20170211141659-3bd2f7eb4d94/go.mod h1:yp/8QThbBFNKDA0nZKkyLPPZ/o3UwdbsnKH3mVpmJ94=
diff --git a/testdata/benchmarks/yenc.go b/testdata/benchmarks/yenc.go
index 70ee00baff5a1163ca582133fc7ca1e3168a2316..a5b476a8fe2ace8895bf75916ace4e40a5e91303 100644
--- a/testdata/benchmarks/yenc.go
+++ b/testdata/benchmarks/yenc.go
@@ -1,6 +1,10 @@
package yenc
-import "unsafe"
+import (
+ "unsafe"
+
+ "github.com/yesuu/simd"
+)
func YEnc(input byte) (byte, bool) {
escape := false
@@ -49,3 +53,65 @@ result = append(result, input[i])
}
return result
}
+
+func YEncSIMD(input [16]byte) []byte {
+ in := simd.Uint8x16{
+ input[0],
+ input[1],
+ input[2],
+ input[3],
+ input[4],
+ input[5],
+ input[6],
+ input[7],
+ input[8],
+ input[9],
+ input[10],
+ input[11],
+ input[12],
+ input[13],
+ input[14],
+ input[15],
+ }
+
+ in = simd.AddUint8x16(in, mask42)
+
+ mask := simd.Uint8x16{}
+
+ for i, v := range in {
+ if v == 0x00 || v == 0x0A || v == 0x0D || v == 0x3D {
+ mask[i] = 0x40
+ }
+ }
+
+ in = simd.AddUint8x16(in, mask)
+
+ var result []byte
+
+ for i, v := range mask {
+ if v != 0 {
+ result = append(result, 0x3D)
+ }
+ result = append(result, in[i])
+ }
+ return result
+}
+
+var mask42 = simd.Uint8x16{
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+ 0x2a,
+}
diff --git a/testdata/benchmarks/yenc_test.go b/testdata/benchmarks/yenc_test.go
index de1b3ba2dded1ceb280ba5eebe1795686dfa9351..7745381e811e8a67521f52155a001e102787095a 100644
--- a/testdata/benchmarks/yenc_test.go
+++ b/testdata/benchmarks/yenc_test.go
@@ -165,3 +165,102 @@ }
})
}
}
+
+func BenchmarkEncoding16Byte(b *testing.B) {
+ indata := [16]byte{5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5}
+ encoder := []struct {
+ name string
+ fn func(byte) (byte, bool)
+ }{
+ {"naive", YEnc},
+ {"lookup-table", YEncLT},
+ {"hashmap", YEncHashmap},
+ }
+ for _, enc := range encoder {
+ b.Run(enc.name, func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ for j := 0; j < 16; j++ {
+ _, _ = enc.fn(5)
+ }
+ }
+ })
+ }
+
+ multiencoder := []struct {
+ name string
+ fn func([8]byte) []byte
+ }{
+ {"bootleg-simd", YEncBootlegSIMD},
+ }
+ for _, enc := range multiencoder {
+ b.Run(enc.name, func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = enc.fn([8]byte{5, 5, 5, 5, 5, 5, 5, 5})
+ _ = enc.fn([8]byte{5, 5, 5, 5, 5, 5, 5, 5})
+ }
+ })
+ }
+
+ simdEncoder := []struct {
+ name string
+ fn func([16]byte) []byte
+ }{
+ {"simd", YEncSIMD},
+ }
+ for _, enc := range simdEncoder {
+ b.Run(enc.name, func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = enc.fn(indata)
+ }
+ })
+ }
+}
+
+func BenchmarkEncoding16ByteEscaped(b *testing.B) {
+ indata := [16]byte{19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19}
+ encoder := []struct {
+ name string
+ fn func(byte) (byte, bool)
+ }{
+ {"naive", YEnc},
+ {"lookup-table", YEncLT},
+ {"hashmap", YEncHashmap},
+ }
+ for _, enc := range encoder {
+ b.Run(enc.name, func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ for j := 0; j < 16; j++ {
+ _, _ = enc.fn(indata[j])
+ }
+ }
+ })
+ }
+
+ multiencoder := []struct {
+ name string
+ fn func([8]byte) []byte
+ }{
+ {"bootleg-simd", YEncBootlegSIMD},
+ }
+ for _, enc := range multiencoder {
+ b.Run(enc.name, func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = enc.fn([8]byte{19, 19, 19, 19, 19, 19, 19, 19})
+ }
+ })
+ }
+
+ simdEncoder := []struct {
+ name string
+ fn func([16]byte) []byte
+ }{
+ {"simd", YEncSIMD},
+ }
+ for _, enc := range simdEncoder {
+ b.Run(enc.name, func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ _ = enc.fn(indata)
+ }
+ })
+ }
+}
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