mirror of
https://github.com/fumiama/go-base16384.git
synced 2026-06-05 00:32:52 +08:00
87b51ceb35
name old time/op new time/op delta EncodeTo/16-8 45.5ns ± 1% 35.9ns ± 1% -21.01% (p=0.008 n=5+5) EncodeTo/256-8 241ns ± 1% 170ns ± 1% -29.64% (p=0.008 n=5+5) EncodeTo/4K-8 2.90µs ± 0% 1.70µs ± 0% -41.60% (p=0.008 n=5+5) EncodeTo/32K-8 23.5µs ± 2% 13.6µs ± 2% -42.20% (p=0.008 n=5+5) DecodeTo/16-8 20.2ns ± 0% 10.3ns ± 2% -48.92% (p=0.008 n=5+5) DecodeTo/256-8 141ns ± 1% 71ns ± 0% -49.55% (p=0.008 n=5+5) DecodeTo/4K-8 2.03µs ± 1% 0.94µs ± 0% -53.82% (p=0.008 n=5+5) DecodeTo/32K-8 16.1µs ± 0% 7.5µs ± 0% -53.22% (p=0.008 n=5+5) name old speed new speed delta EncodeTo/16-8 352MB/s ± 1% 445MB/s ± 1% +26.59% (p=0.008 n=5+5) EncodeTo/256-8 1.06GB/s ± 1% 1.51GB/s ± 1% +42.13% (p=0.008 n=5+5) EncodeTo/4K-8 1.41GB/s ± 0% 2.42GB/s ± 0% +71.24% (p=0.008 n=5+5) EncodeTo/32K-8 1.40GB/s ± 2% 2.42GB/s ± 2% +73.01% (p=0.008 n=5+5) DecodeTo/16-8 1.09GB/s ± 0% 2.14GB/s ± 2% +95.84% (p=0.008 n=5+5) DecodeTo/256-8 2.10GB/s ± 1% 4.16GB/s ± 0% +98.21% (p=0.008 n=5+5) DecodeTo/4K-8 2.30GB/s ± 1% 4.99GB/s ± 0% +116.55% (p=0.008 n=5+5) DecodeTo/32K-8 2.33GB/s ± 0% 4.98GB/s ± 0% +113.78% (p=0.008 n=5+5)
106 lines
2.8 KiB
Go
106 lines
2.8 KiB
Go
//go:build !amd64
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// +build !amd64
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package base14
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import "encoding/binary"
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//go:nosplit
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func encode(offset, outlen int, b, encd []byte) {
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var n int
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i := 0
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for ; i <= len(b)-7; i += 7 {
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shift := binary.BigEndian.Uint64(b[i:]) >> 2
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sum := shift
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sum &= 0x3fff000000000000
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shift >>= 2
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sum |= shift & 0x00003fff00000000
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shift >>= 2
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sum |= shift & 0x000000003fff0000
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shift >>= 2
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sum |= shift & 0x0000000000003fff
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sum += 0x4e004e004e004e00
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binary.BigEndian.PutUint64(encd[n:], sum)
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n += 8
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}
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if offset > 0 {
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sum := 0x000000000000003f & ((uint64)(b[i]) >> 2)
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sum |= ((uint64)(b[i]) << 14) & 0x000000000000c000
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if offset > 1 {
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sum |= ((uint64)(b[i+1]) << 6) & 0x0000000000003f00
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sum |= ((uint64)(b[i+1]) << 20) & 0x0000000000300000
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if offset > 2 {
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sum |= ((uint64)(b[i+2]) << 12) & 0x00000000000f0000
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sum |= ((uint64)(b[i+2]) << 28) & 0x00000000f0000000
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if offset > 3 {
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sum |= ((uint64)(b[i+3]) << 20) & 0x000000000f000000
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sum |= ((uint64)(b[i+3]) << 34) & 0x0000003c00000000
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if offset > 4 {
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sum |= ((uint64)(b[i+4]) << 26) & 0x0000000300000000
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sum |= ((uint64)(b[i+4]) << 42) & 0x0000fc0000000000
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if offset > 5 {
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sum |= ((uint64)(b[i+5]) << 34) & 0x0000030000000000
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sum |= ((uint64)(b[i+5]) << 48) & 0x003f000000000000
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}
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}
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}
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}
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}
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sum += 0x004e004e004e004e
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var tmp [8]byte
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binary.LittleEndian.PutUint64(tmp[:], sum)
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copy(encd[n:], tmp[:])
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encd[outlen-2] = '='
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encd[outlen-1] = byte(offset)
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}
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}
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//go:nosplit
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func decode(offset, outlen int, b, decd []byte) {
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var n uintptr
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i := 0
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for ; i <= outlen-7; n += 8 {
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shift := binary.BigEndian.Uint64(b[n:]) - 0x4e004e004e004e00
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shift <<= 2
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sum := shift & 0xfffc000000000000
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shift <<= 2
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sum |= shift & 0x0003fff000000000
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shift <<= 2
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sum |= shift & 0x0000000fffc00000
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shift <<= 2
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sum |= shift & 0x00000000003fff00
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binary.BigEndian.PutUint64(decd[i:], sum)
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i += 7
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}
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if offset > 0 {
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var tmp [8]byte
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copy(tmp[:], b[n:])
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sum := binary.LittleEndian.Uint64(tmp[:]) - 0x000000000000004e
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decd[i] = byte(((sum & 0x000000000000003f) << 2) | ((sum & 0x000000000000c000) >> 14))
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i++
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if offset > 1 {
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sum -= 0x00000000004e0000
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decd[i] = byte(((sum & 0x0000000000003f00) >> 6) | ((sum & 0x0000000000300000) >> 20))
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i++
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if offset > 2 {
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decd[i] = byte(((sum & 0x00000000000f0000) >> 12) | ((sum & 0x00000000f0000000) >> 28))
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i++
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if offset > 3 {
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sum -= 0x0000004e00000000
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decd[i] = byte(((sum & 0x000000000f000000) >> 20) | ((sum & 0x0000003c00000000) >> 34))
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i++
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if offset > 4 {
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decd[i] = byte(((sum & 0x0000000300000000) >> 26) | ((sum & 0x0000fc0000000000) >> 42))
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i++
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if offset > 5 {
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sum -= 0x004e000000000000
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decd[i] = byte(((sum & 0x0000030000000000) >> 34) | ((sum & 0x003f000000000000) >> 48))
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i++
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}
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}
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}
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}
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}
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}
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}
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