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turbob64v256.c
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/**
Copyright (C) powturbo 2016-2023
SPDX-License-Identifier: GPL v3 License
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- homepage : https://sites.google.com/site/powturbo/
- github : https://github.com/powturbo
- twitter : https://twitter.com/powturbo
- email : powturbo [_AT_] gmail [_DOT_] com
**/
// Turbo-Base64: avx2 encode/decode
// SSE + AVX2 Based on:
// http://0x80.pl/articles/index.html#base64-algorithm-update
// https://arxiv.org/abs/1704.00605
// https://gist.github.com/aqrit/a2ccea48d7cac7e9d4d99f19d4759666 (decode)
#include <immintrin.h>
#include "turbob64.h"
#include "conf.h" //AS
#include "turbob64_.h"
//--------------------- Decode ----------------------------------------------------------------------
#define BITPACK256V8_6(v,cpv) {\
const __m256i merge_ab_bc = _mm256_maddubs_epi16(v, _mm256_set1_epi32(0x01400140));\
v = _mm256_madd_epi16(merge_ab_bc, _mm256_set1_epi32(0x00011000));\
v = _mm256_shuffle_epi8(v, cpv);\
}
#define BITMAP256V8_6(iv, shifted, delta_asso, delta_values, ov) { /*map 8-bits ascii to 6-bits bin*/\
shifted = _mm256_srli_epi32(iv, 3);\
const __m256i delta_hash = _mm256_avg_epu8(_mm256_shuffle_epi8(delta_asso, iv), shifted);\
ov = _mm256_add_epi8(_mm256_shuffle_epi8(delta_values, delta_hash), iv);\
}
#define B64CHK256(iv, shifted, check_asso, check_values, vx) {\
const __m256i check_hash = _mm256_avg_epu8( _mm256_shuffle_epi8(check_asso, iv), shifted);\
const __m256i chk = _mm256_adds_epi8(_mm256_shuffle_epi8(check_values, check_hash), iv);\
vx = _mm256_or_si256(vx, chk);\
}
#define DS128(_i_) {\
__m256i iv0 = _mm256_loadu_si256((__m256i *)(ip+64+_i_*128+0)), \
iv1 = _mm256_loadu_si256((__m256i *)(ip+64+_i_*128+32));\
\
__m256i ou0,shiftedu0; BITMAP256V8_6(iu0, shiftedu0, delta_asso, delta_values, ou0); BITPACK256V8_6(ou0, cpv);\
__m256i ou1,shiftedu1; BITMAP256V8_6(iu1, shiftedu1, delta_asso, delta_values, ou1); BITPACK256V8_6(ou1, cpv);\
\
CHECK0(B64CHK256(iu0,shiftedu0, check_asso, check_values, vx)); \
iu0 = _mm256_loadu_si256((__m256i *)(ip+64+_i_*128+64));\
CHECK1(B64CHK256(iu1,shiftedu1, check_asso, check_values, vx)); \
iu1 = _mm256_loadu_si256((__m256i *)(ip+64+_i_*128+96));\
_mm_storeu_si128((__m128i*)(op+_i_*96 ), _mm256_castsi256_si128( ou0 ));\
_mm_storeu_si128((__m128i*)(op+_i_*96+12), _mm256_extracti128_si256(ou0, 1));\
_mm_storeu_si128((__m128i*)(op+_i_*96+24), _mm256_castsi256_si128( ou1 ));\
_mm_storeu_si128((__m128i*)(op+_i_*96+36), _mm256_extracti128_si256(ou1, 1));\
\
__m256i ov0,shiftedv0; BITMAP256V8_6(iv0, shiftedv0, delta_asso, delta_values, ov0); BITPACK256V8_6(ov0, cpv);\
__m256i ov1,shiftedv1; BITMAP256V8_6(iv1, shiftedv1, delta_asso, delta_values, ov1); BITPACK256V8_6(ov1, cpv);\
\
CHECK1(B64CHK256(iv0, shiftedv0, check_asso, check_values, vx));\
CHECK1(B64CHK256(iv1, shiftedv1, check_asso, check_values, vx));\
_mm_storeu_si128((__m128i*)(op+_i_*96+48), _mm256_castsi256_si128( ov0 ));\
_mm_storeu_si128((__m128i*)(op+_i_*96+60), _mm256_extracti128_si256(ov0, 1));\
_mm_storeu_si128((__m128i*)(op+_i_*96+72), _mm256_castsi256_si128( ov1 ));\
_mm_storeu_si128((__m128i*)(op+_i_*96+84), _mm256_extracti128_si256(ov1, 1));\
}
size_t tb64v256dec(const unsigned char *__restrict in, size_t inlen, unsigned char *__restrict out) {
if(inlen&3)
return 0;
const unsigned char *ip = in, *in_ = in + inlen;
unsigned char *op = out;
__m256i vx = _mm256_setzero_si256();
const __m256i delta_asso = _mm256_setr_epi8(0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x0f,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x0f),
delta_values = _mm256_setr_epi8(0x00, 0x00, 0x00, 0x13, 0x04, 0xbf, 0xbf, 0xb9, 0xb9, 0x00, 0x10, 0xc3, 0xbf, 0xbf, 0xb9, 0xb9,
0x00, 0x00, 0x00, 0x13, 0x04, 0xbf, 0xbf, 0xb9, 0xb9, 0x00, 0x10, 0xc3, 0xbf, 0xbf, 0xb9, 0xb9),
#ifndef NB64CHECK
check_asso = _mm256_setr_epi8(0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x07, 0x0b, 0x0b, 0x0b, 0x0f,
0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x07, 0x0b, 0x0b, 0x0b, 0x0f),
check_values = _mm256_setr_epi8(0x80, 0x80, 0x80, 0x80, 0xcf, 0xbf, 0xd5, 0xa6, 0xb5, 0x86, 0xd1, 0x80, 0xb1, 0x80, 0x91, 0x80,
0x80, 0x80, 0x80, 0x80, 0xcf, 0xbf, 0xd5, 0xa6, 0xb5, 0x86, 0xd1, 0x80, 0xb1, 0x80, 0x91, 0x80),
#endif
cpv = _mm256_set_epi8( -1, -1, -1, -1, 12, 13, 14, 8, 9, 10, 4, 5, 6, 0, 1, 2,
-1, -1, -1, -1, 12, 13, 14, 8, 9, 10, 4, 5, 6, 0, 1, 2);
__m128i _vx;
if(inlen >= 64+128+4) {
__m256i iu0 = _mm256_loadu_si256((__m256i *) ip ),
iu1 = _mm256_loadu_si256((__m256i *)(ip+32));
for(;ip < in_-(64+2*128+4); ip += 256, op += 256*3/4) { DS128(0); DS128(1); }
if( ip < in_-(64+ 128+4)) { DS128(0); ip += 128; op += 128*3/4; }
CHECK0(_vx = _mm_or_si128(_mm256_extracti128_si256(vx, 1), _mm256_castsi256_si128(vx)));
} else {
CHECK0(_vx = _mm_setzero_si128());
if(!inlen) return 0;
}
for(;ip < in_-(16+4); ip += 16, op += 16*3/4) {
__m128i iv = _mm_loadu_si128((__m128i *) ip), ov, vsh;
BITMAP128V8_6(iv, vsh, _mm256_castsi256_si128(delta_asso), _mm256_castsi256_si128(delta_values), ov);
BITPACK128V8_6(ov, _mm256_castsi256_si128(cpv));
_mm_storeu_si128((__m128i*) op, ov);
CHECK0(B64CHK128(iv, vsh, _mm256_castsi256_si128(check_asso), _mm256_castsi256_si128(check_values), _vx));
}
size_t rc = 0, r = in_- ip;
if(r && !(rc = _tb64xd(ip, r, op)) CHECK0(|| _mm_movemask_epi8(_vx)))
return 0; //AC(op+rc == out+tb64declen(in, inlen), "#4 out"); AC(ip+r == in+inlen, "#5 in");
return (op - out)+rc;
}
//-------------------- Encode ----------------------------------------------------------------------
#define ES128(_i_) {\
__m256i v0 = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *)(ip+48+_i_*96+ 0)) );\
v0 = _mm256_inserti128_si256(v0,_mm_loadu_si128((__m128i *)(ip+48+_i_*96+12)),1);\
__m256i v1 = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *)(ip+48+_i_*96+24)) );\
v1 = _mm256_inserti128_si256(v1,_mm_loadu_si128((__m128i *)(ip+48+_i_*96+36)),1);\
\
u0 = _mm256_shuffle_epi8(u0, vh); u0 = bitunpack256v8_6(u0); u0 = bitmap256v8_6(u0);\
u1 = _mm256_shuffle_epi8(u1, vh); u1 = bitunpack256v8_6(u1); u1 = bitmap256v8_6(u1);\
_mm256_storeu_si256((__m256i*)(op+_i_*128), u0); \
_mm256_storeu_si256((__m256i*)(op+_i_*128+32), u1); \
\
u0 = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *)(ip+48+_i_*96+48)) );\
u0 = _mm256_inserti128_si256(u0,_mm_loadu_si128((__m128i *)(ip+48+_i_*96+60)),1);\
u1 = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *)(ip+48+_i_*96+72)) );\
u1 = _mm256_inserti128_si256(u1,_mm_loadu_si128((__m128i *)(ip+48+_i_*96+84)),1); \
\
v0 = _mm256_shuffle_epi8(v0, vh); v0 = bitunpack256v8_6(v0); v0 = bitmap256v8_6(v0);\
v1 = _mm256_shuffle_epi8(v1, vh); v1 = bitunpack256v8_6(v1); v1 = bitmap256v8_6(v1); \
_mm256_storeu_si256((__m256i*)(op+_i_*128+64), v0);\
_mm256_storeu_si256((__m256i*)(op+_i_*128+96), v1);\
}
size_t tb64v256enc(const unsigned char *__restrict in, size_t inlen, unsigned char *__restrict out) {
size_t outlen = TB64ENCLEN(inlen);
const unsigned char *ip = in, *out_ = out+outlen;
unsigned char *op = out;
const __m256i vh = _mm256_set_epi8(10,11, 9,10, 7, 8, 6, 7, 4, 5, 3, 4, 1, 2, 0, 1,
10,11, 9,10, 7, 8, 6, 7, 4, 5, 3, 4, 1, 2, 0, 1);
if(outlen >= (48+96+4)*4/3) {
__m256i u0 = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *) ip ) );
u0 = _mm256_inserti128_si256(u0,_mm_loadu_si128((__m128i *)(ip+12)),1);
__m256i u1 = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *)(ip+24)) );
u1 = _mm256_inserti128_si256(u1,_mm_loadu_si128((__m128i *)(ip+36)),1);
for(; op < out_ - (48+2*96+4)*4/3; ip += 256*3/4, op += 256) { ES128(0); ES128(1); }
if( op < out_ - (48+ 96+4)*4/3) { ES128(0); ip += 128*3/4; op += 128; }
}
for(; op < out_- (24+4)*4/3; op += 32, ip += 32*3/4) {
__m256i v = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *) ip ) );
v = _mm256_inserti128_si256(v,_mm_loadu_si128((__m128i *)(ip+12)),1);
v = _mm256_shuffle_epi8(v, vh);
v = bitunpack256v8_6(v);
v = bitmap256v8_6(v);
_mm256_storeu_si256((__m256i*) op, v);
}
EXTAIL(7);
return outlen;
}
//------- optimized functions for short strings only --------------------------
// OVHD=0 : unsafe, can read beyond the input buffer end, therefore input buffer size must be 32 bytes larger than input length
#define OVHD 0
//#define OVHD 4
#define _CHECK0(a) CHECK0(a)
#define _CHECK1(a) CHECK1(a)
size_t _tb64v256dec(const unsigned char *__restrict in, size_t inlen, unsigned char *__restrict out) { AS((inlen&3)==0, "inlen not multiple of 4\n");
if(inlen >= 16+OVHD) {
const unsigned char *ip = in, *in_ = in + inlen;
unsigned char *op = out;
const __m256i delta_asso = _mm256_setr_epi8(0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x0f,
0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x0f),
delta_values = _mm256_setr_epi8(0x00, 0x00, 0x00, 0x13, 0x04, 0xbf, 0xbf, 0xb9, 0xb9, 0x00, 0x10, 0xc3, 0xbf, 0xbf, 0xb9, 0xb9,
0x00, 0x00, 0x00, 0x13, 0x04, 0xbf, 0xbf, 0xb9, 0xb9, 0x00, 0x10, 0xc3, 0xbf, 0xbf, 0xb9, 0xb9),
#ifndef NB64CHECK
check_asso = _mm256_setr_epi8(0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x07, 0x0b, 0x0b, 0x0b, 0x0f,
0x0d, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x07, 0x0b, 0x0b, 0x0b, 0x0f),
check_values = _mm256_setr_epi8(0x80, 0x80, 0x80, 0x80, 0xcf, 0xbf, 0xd5, 0xa6, 0xb5, 0x86, 0xd1, 0x80, 0xb1, 0x80, 0x91, 0x80,
0x80, 0x80, 0x80, 0x80, 0xcf, 0xbf, 0xd5, 0xa6, 0xb5, 0x86, 0xd1, 0x80, 0xb1, 0x80, 0x91, 0x80),
#endif
cpv = _mm256_set_epi8( -1, -1, -1, -1, 12, 13, 14, 8, 9, 10, 4, 5, 6, 0, 1, 2,
-1, -1, -1, -1, 12, 13, 14, 8, 9, 10, 4, 5, 6, 0, 1, 2);
__m256i vx = _mm256_setzero_si256();
for(; ip < in_-(32+OVHD); ip += 32, op += 32*3/4) {
__m256i iv = _mm256_loadu_si256((__m256i *)ip), ov, vsh;
BITMAP256V8_6(iv, vsh, delta_asso, delta_values, ov);
BITPACK256V8_6(ov, cpv);
_mm_storeu_si128((__m128i*) op, _mm256_castsi256_si128(ov));
_mm_storeu_si128((__m128i*)(op + 12), _mm256_extracti128_si256(ov, 1));
_CHECK1(B64CHK256(iv, vsh, check_asso, check_values, vx));
}
unsigned cx;
if(ip < in_-(16+OVHD)) {
__m128i iv = _mm_loadu_si128((__m128i *) ip), ov, vsh;
ip += 16;
#ifdef B64CHECK
__m128i _vx = _mm_or_si128(_mm256_extracti128_si256(vx, 1), _mm256_castsi256_si128(vx));
#else
__m128i _vx = _mm_setzero_si128();
#endif
BITMAP128V8_6(iv, vsh, _mm256_castsi256_si128(delta_asso), _mm256_castsi256_si128(delta_values), ov);
BITPACK128V8_6(ov, _mm256_castsi256_si128(cpv));
_mm_storeu_si128((__m128i*) op, ov);
op += 16*3/4;
_CHECK0(B64CHK128(iv, vsh, _mm256_castsi256_si128(check_asso), _mm256_castsi256_si128(check_values), _vx));
_CHECK0(cx = _mm_movemask_epi8(_vx));
} _CHECK0(else cx = _mm256_movemask_epi8(vx));
size_t rc = 0, r = in_- ip;
if(r && !(rc = _tb64xd(ip, r, op)) _CHECK0(|| cx))
return 0; //AC(op+rc == out+tb64declen(in, inlen), "#4 out"); AC(ip+r == in+inlen, "#5 in");
return (op - out)+rc;
} else if(!inlen) return 0;
return _tb64xd(in, inlen, out);
}
size_t _tb64v256enc(const unsigned char *__restrict in, size_t inlen, unsigned char *__restrict out) {
size_t outlen = TB64ENCLEN(inlen);
const unsigned char *ip = in, *out_ = out+outlen;
unsigned char *op = out;
const __m256i vh = _mm256_set_epi8(10,11, 9,10, 7, 8, 6, 7, 4, 5, 3, 4, 1, 2, 0, 1,
10,11, 9,10, 7, 8, 6, 7, 4, 5, 3, 4, 1, 2, 0, 1);
for(; op < out_- (24+4)*4/3; op += 32, ip += 32*3/4) {
__m256i v = _mm256_castsi128_si256( _mm_loadu_si128((__m128i *) ip ) );
v = _mm256_inserti128_si256(v,_mm_loadu_si128((__m128i *)(ip+12)),1);
v = _mm256_shuffle_epi8(v, vh);
v = bitunpack256v8_6(v);
v = bitmap256v8_6(v);
_mm256_storeu_si256((__m256i*) op, v);
}
if(op <= out_-(12+4)*4/3) {
__m128i v0 = _mm_loadu_si128((__m128i*)ip);
v0 = _mm_shuffle_epi8(v0, _mm256_castsi256_si128(vh));
v0 = bitunpack128v8_6(v0);
v0 = bitmap128v8_6(v0);
_mm_storeu_si128((__m128i*) op, v0);
op += 16; ip += (16/4)*3;
}
EXTAIL(3);
return outlen;
}