diff --git a/third_party/utf8_range/BUILD b/third_party/utf8_range/BUILD new file mode 100644 index 0000000000..68b3e9e74f --- /dev/null +++ b/third_party/utf8_range/BUILD @@ -0,0 +1,13 @@ + +cc_library( + name = "utf8_range", + hdrs = ["utf8_range.h"], + srcs = ["utf8_range.c"], + visibility = ["//:__pkg__"], +) + +filegroup( + name = "cmake_files", + srcs = glob(["*"]), + visibility = ["//cmake:__pkg__"], +) diff --git a/third_party/utf8_range/LICENSE b/third_party/utf8_range/LICENSE new file mode 100644 index 0000000000..c1f087ecc8 --- /dev/null +++ b/third_party/utf8_range/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2019 Yibo Cai + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/third_party/utf8_range/utf8_range.c b/third_party/utf8_range/utf8_range.c new file mode 100644 index 0000000000..109a54da5c --- /dev/null +++ b/third_party/utf8_range/utf8_range.c @@ -0,0 +1,395 @@ + +/* + * http://www.unicode.org/versions/Unicode6.0.0/ch03.pdf - page 94 + * + * Table 3-7. Well-Formed UTF-8 Byte Sequences + * + * +--------------------+------------+-------------+------------+-------------+ + * | Code Points | First Byte | Second Byte | Third Byte | Fourth Byte | + * +--------------------+------------+-------------+------------+-------------+ + * | U+0000..U+007F | 00..7F | | | | + * +--------------------+------------+-------------+------------+-------------+ + * | U+0080..U+07FF | C2..DF | 80..BF | | | + * +--------------------+------------+-------------+------------+-------------+ + * | U+0800..U+0FFF | E0 | A0..BF | 80..BF | | + * +--------------------+------------+-------------+------------+-------------+ + * | U+1000..U+CFFF | E1..EC | 80..BF | 80..BF | | + * +--------------------+------------+-------------+------------+-------------+ + * | U+D000..U+D7FF | ED | 80..9F | 80..BF | | + * +--------------------+------------+-------------+------------+-------------+ + * | U+E000..U+FFFF | EE..EF | 80..BF | 80..BF | | + * +--------------------+------------+-------------+------------+-------------+ + * | U+10000..U+3FFFF | F0 | 90..BF | 80..BF | 80..BF | + * +--------------------+------------+-------------+------------+-------------+ + * | U+40000..U+FFFFF | F1..F3 | 80..BF | 80..BF | 80..BF | + * +--------------------+------------+-------------+------------+-------------+ + * | U+100000..U+10FFFF | F4 | 80..8F | 80..BF | 80..BF | + * +--------------------+------------+-------------+------------+-------------+ + */ + +/* Return 0 - success, >0 - index(1 based) of first error char */ +int utf8_naive(const unsigned char* data, int len) { + int err_pos = 1; + + while (len) { + int bytes; + const unsigned char byte1 = data[0]; + + /* 00..7F */ + if (byte1 <= 0x7F) { + bytes = 1; + /* C2..DF, 80..BF */ + } else if (len >= 2 && byte1 >= 0xC2 && byte1 <= 0xDF && + (signed char)data[1] <= (signed char)0xBF) { + bytes = 2; + } else if (len >= 3) { + const unsigned char byte2 = data[1]; + + /* Is byte2, byte3 between 0x80 ~ 0xBF */ + const int byte2_ok = (signed char)byte2 <= (signed char)0xBF; + const int byte3_ok = (signed char)data[2] <= (signed char)0xBF; + + if (byte2_ok && byte3_ok && + /* E0, A0..BF, 80..BF */ + ((byte1 == 0xE0 && byte2 >= 0xA0) || + /* E1..EC, 80..BF, 80..BF */ + (byte1 >= 0xE1 && byte1 <= 0xEC) || + /* ED, 80..9F, 80..BF */ + (byte1 == 0xED && byte2 <= 0x9F) || + /* EE..EF, 80..BF, 80..BF */ + (byte1 >= 0xEE && byte1 <= 0xEF))) { + bytes = 3; + } else if (len >= 4) { + /* Is byte4 between 0x80 ~ 0xBF */ + const int byte4_ok = (signed char)data[3] <= (signed char)0xBF; + + if (byte2_ok && byte3_ok && byte4_ok && + /* F0, 90..BF, 80..BF, 80..BF */ + ((byte1 == 0xF0 && byte2 >= 0x90) || + /* F1..F3, 80..BF, 80..BF, 80..BF */ + (byte1 >= 0xF1 && byte1 <= 0xF3) || + /* F4, 80..8F, 80..BF, 80..BF */ + (byte1 == 0xF4 && byte2 <= 0x8F))) { + bytes = 4; + } else { + return err_pos; + } + } else { + return err_pos; + } + } else { + return err_pos; + } + + len -= bytes; + err_pos += bytes; + data += bytes; + } + + return 0; +} + +#ifdef __SSE4_1__ + +#include +#include +#include + +int utf8_naive(const unsigned char* data, int len); + +static const int8_t _first_len_tbl[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, +}; + +static const int8_t _first_range_tbl[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, +}; + +static const int8_t _range_min_tbl[] = { + 0x00, 0x80, 0x80, 0x80, 0xA0, 0x80, 0x90, 0x80, + 0xC2, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, 0x7F, +}; +static const int8_t _range_max_tbl[] = { + 0x7F, 0xBF, 0xBF, 0xBF, 0xBF, 0x9F, 0xBF, 0x8F, + 0xF4, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, +}; + +static const int8_t _df_ee_tbl[] = { + 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, +}; +static const int8_t _ef_fe_tbl[] = { + 0, 3, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, +}; + +/* Return 0 on success, -1 on error */ +int utf8_range2(const unsigned char* data, int len) { + if (len >= 32) { + __m128i prev_input = _mm_set1_epi8(0); + __m128i prev_first_len = _mm_set1_epi8(0); + + const __m128i first_len_tbl = + _mm_loadu_si128((const __m128i*)_first_len_tbl); + const __m128i first_range_tbl = + _mm_loadu_si128((const __m128i*)_first_range_tbl); + const __m128i range_min_tbl = + _mm_loadu_si128((const __m128i*)_range_min_tbl); + const __m128i range_max_tbl = + _mm_loadu_si128((const __m128i*)_range_max_tbl); + const __m128i df_ee_tbl = _mm_loadu_si128((const __m128i*)_df_ee_tbl); + const __m128i ef_fe_tbl = _mm_loadu_si128((const __m128i*)_ef_fe_tbl); + + __m128i error = _mm_set1_epi8(0); + + while (len >= 32) { + /***************************** block 1 ****************************/ + const __m128i input_a = _mm_loadu_si128((const __m128i*)data); + + __m128i high_nibbles = + _mm_and_si128(_mm_srli_epi16(input_a, 4), _mm_set1_epi8(0x0F)); + + __m128i first_len_a = _mm_shuffle_epi8(first_len_tbl, high_nibbles); + + __m128i range_a = _mm_shuffle_epi8(first_range_tbl, high_nibbles); + + range_a = _mm_or_si128(range_a, + _mm_alignr_epi8(first_len_a, prev_first_len, 15)); + + __m128i tmp; + tmp = _mm_alignr_epi8(first_len_a, prev_first_len, 14); + tmp = _mm_subs_epu8(tmp, _mm_set1_epi8(1)); + range_a = _mm_or_si128(range_a, tmp); + + tmp = _mm_alignr_epi8(first_len_a, prev_first_len, 13); + tmp = _mm_subs_epu8(tmp, _mm_set1_epi8(2)); + range_a = _mm_or_si128(range_a, tmp); + + __m128i shift1, pos, range2; + shift1 = _mm_alignr_epi8(input_a, prev_input, 15); + pos = _mm_sub_epi8(shift1, _mm_set1_epi8(0xEF)); + tmp = _mm_subs_epu8(pos, _mm_set1_epi8(0xF0)); + range2 = _mm_shuffle_epi8(df_ee_tbl, tmp); + tmp = _mm_adds_epu8(pos, _mm_set1_epi8(0x70)); + range2 = _mm_add_epi8(range2, _mm_shuffle_epi8(ef_fe_tbl, tmp)); + + range_a = _mm_add_epi8(range_a, range2); + + __m128i minv = _mm_shuffle_epi8(range_min_tbl, range_a); + __m128i maxv = _mm_shuffle_epi8(range_max_tbl, range_a); + + tmp = _mm_or_si128(_mm_cmplt_epi8(input_a, minv), + _mm_cmpgt_epi8(input_a, maxv)); + error = _mm_or_si128(error, tmp); + + /***************************** block 2 ****************************/ + const __m128i input_b = _mm_loadu_si128((const __m128i*)(data + 16)); + + high_nibbles = + _mm_and_si128(_mm_srli_epi16(input_b, 4), _mm_set1_epi8(0x0F)); + + __m128i first_len_b = _mm_shuffle_epi8(first_len_tbl, high_nibbles); + + __m128i range_b = _mm_shuffle_epi8(first_range_tbl, high_nibbles); + + range_b = + _mm_or_si128(range_b, _mm_alignr_epi8(first_len_b, first_len_a, 15)); + + tmp = _mm_alignr_epi8(first_len_b, first_len_a, 14); + tmp = _mm_subs_epu8(tmp, _mm_set1_epi8(1)); + range_b = _mm_or_si128(range_b, tmp); + + tmp = _mm_alignr_epi8(first_len_b, first_len_a, 13); + tmp = _mm_subs_epu8(tmp, _mm_set1_epi8(2)); + range_b = _mm_or_si128(range_b, tmp); + + shift1 = _mm_alignr_epi8(input_b, input_a, 15); + pos = _mm_sub_epi8(shift1, _mm_set1_epi8(0xEF)); + tmp = _mm_subs_epu8(pos, _mm_set1_epi8(0xF0)); + range2 = _mm_shuffle_epi8(df_ee_tbl, tmp); + tmp = _mm_adds_epu8(pos, _mm_set1_epi8(0x70)); + range2 = _mm_add_epi8(range2, _mm_shuffle_epi8(ef_fe_tbl, tmp)); + + range_b = _mm_add_epi8(range_b, range2); + + minv = _mm_shuffle_epi8(range_min_tbl, range_b); + maxv = _mm_shuffle_epi8(range_max_tbl, range_b); + + tmp = _mm_or_si128(_mm_cmplt_epi8(input_b, minv), + _mm_cmpgt_epi8(input_b, maxv)); + error = _mm_or_si128(error, tmp); + + /************************ next iteration **************************/ + prev_input = input_b; + prev_first_len = first_len_b; + + data += 32; + len -= 32; + } + + if (!_mm_testz_si128(error, error)) return -1; + + int32_t token4 = _mm_extract_epi32(prev_input, 3); + const int8_t* token = (const int8_t*)&token4; + int lookahead = 0; + if (token[3] > (int8_t)0xBF) + lookahead = 1; + else if (token[2] > (int8_t)0xBF) + lookahead = 2; + else if (token[1] > (int8_t)0xBF) + lookahead = 3; + + data -= lookahead; + len += lookahead; + } + + return utf8_naive(data, len); +} + +#endif + +#ifdef __ARM_NEON + +#include +#include +#include + +int utf8_naive(const unsigned char* data, int len); + +static const uint8_t _first_len_tbl[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, +}; + +static const uint8_t _first_range_tbl[] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, 8, 8, 8, +}; + +static const uint8_t _range_min_tbl[] = { + 0x00, 0x80, 0x80, 0x80, 0xA0, 0x80, 0x90, 0x80, + 0xC2, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, +}; +static const uint8_t _range_max_tbl[] = { + 0x7F, 0xBF, 0xBF, 0xBF, 0xBF, 0x9F, 0xBF, 0x8F, + 0xF4, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, +}; + +static const uint8_t _range_adjust_tbl[] = { + 2, 3, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, +}; + +/* Return 0 on success, -1 on error */ +int utf8_range2(const unsigned char* data, int len) { + if (len >= 32) { + uint8x16_t prev_input = vdupq_n_u8(0); + uint8x16_t prev_first_len = vdupq_n_u8(0); + + const uint8x16_t first_len_tbl = vld1q_u8(_first_len_tbl); + const uint8x16_t first_range_tbl = vld1q_u8(_first_range_tbl); + const uint8x16_t range_min_tbl = vld1q_u8(_range_min_tbl); + const uint8x16_t range_max_tbl = vld1q_u8(_range_max_tbl); + const uint8x16x2_t range_adjust_tbl = vld2q_u8(_range_adjust_tbl); + + const uint8x16_t const_1 = vdupq_n_u8(1); + const uint8x16_t const_2 = vdupq_n_u8(2); + const uint8x16_t const_e0 = vdupq_n_u8(0xE0); + + uint8x16_t error1 = vdupq_n_u8(0); + uint8x16_t error2 = vdupq_n_u8(0); + uint8x16_t error3 = vdupq_n_u8(0); + uint8x16_t error4 = vdupq_n_u8(0); + + while (len >= 32) { + /******************* two blocks interleaved **********************/ + +#if defined(__GNUC__) && !defined(__clang__) && (__GNUC__ < 8) + /* gcc doesn't support vldq1_u8_x2 until version 8 */ + const uint8x16_t input_a = vld1q_u8(data); + const uint8x16_t input_b = vld1q_u8(data + 16); +#else + /* Forces a double load on Clang */ + const uint8x16x2_t input_pair = vld1q_u8_x2(data); + const uint8x16_t input_a = input_pair.val[0]; + const uint8x16_t input_b = input_pair.val[1]; +#endif + + const uint8x16_t high_nibbles_a = vshrq_n_u8(input_a, 4); + const uint8x16_t high_nibbles_b = vshrq_n_u8(input_b, 4); + + const uint8x16_t first_len_a = vqtbl1q_u8(first_len_tbl, high_nibbles_a); + const uint8x16_t first_len_b = vqtbl1q_u8(first_len_tbl, high_nibbles_b); + + uint8x16_t range_a = vqtbl1q_u8(first_range_tbl, high_nibbles_a); + uint8x16_t range_b = vqtbl1q_u8(first_range_tbl, high_nibbles_b); + + range_a = vorrq_u8(range_a, vextq_u8(prev_first_len, first_len_a, 15)); + range_b = vorrq_u8(range_b, vextq_u8(first_len_a, first_len_b, 15)); + + uint8x16_t tmp1_a, tmp2_a, tmp1_b, tmp2_b; + tmp1_a = vextq_u8(prev_first_len, first_len_a, 14); + tmp1_a = vqsubq_u8(tmp1_a, const_1); + range_a = vorrq_u8(range_a, tmp1_a); + + tmp1_b = vextq_u8(first_len_a, first_len_b, 14); + tmp1_b = vqsubq_u8(tmp1_b, const_1); + range_b = vorrq_u8(range_b, tmp1_b); + + tmp2_a = vextq_u8(prev_first_len, first_len_a, 13); + tmp2_a = vqsubq_u8(tmp2_a, const_2); + range_a = vorrq_u8(range_a, tmp2_a); + + tmp2_b = vextq_u8(first_len_a, first_len_b, 13); + tmp2_b = vqsubq_u8(tmp2_b, const_2); + range_b = vorrq_u8(range_b, tmp2_b); + + uint8x16_t shift1_a = vextq_u8(prev_input, input_a, 15); + uint8x16_t pos_a = vsubq_u8(shift1_a, const_e0); + range_a = vaddq_u8(range_a, vqtbl2q_u8(range_adjust_tbl, pos_a)); + + uint8x16_t shift1_b = vextq_u8(input_a, input_b, 15); + uint8x16_t pos_b = vsubq_u8(shift1_b, const_e0); + range_b = vaddq_u8(range_b, vqtbl2q_u8(range_adjust_tbl, pos_b)); + + uint8x16_t minv_a = vqtbl1q_u8(range_min_tbl, range_a); + uint8x16_t maxv_a = vqtbl1q_u8(range_max_tbl, range_a); + + uint8x16_t minv_b = vqtbl1q_u8(range_min_tbl, range_b); + uint8x16_t maxv_b = vqtbl1q_u8(range_max_tbl, range_b); + + error1 = vorrq_u8(error1, vcltq_u8(input_a, minv_a)); + error2 = vorrq_u8(error2, vcgtq_u8(input_a, maxv_a)); + + error3 = vorrq_u8(error3, vcltq_u8(input_b, minv_b)); + error4 = vorrq_u8(error4, vcgtq_u8(input_b, maxv_b)); + + /************************ next iteration *************************/ + prev_input = input_b; + prev_first_len = first_len_b; + + data += 32; + len -= 32; + } + error1 = vorrq_u8(error1, error2); + error1 = vorrq_u8(error1, error3); + error1 = vorrq_u8(error1, error4); + + if (vmaxvq_u8(error1)) return -1; + + uint32_t token4; + vst1q_lane_u32(&token4, vreinterpretq_u32_u8(prev_input), 3); + + const int8_t* token = (const int8_t*)&token4; + int lookahead = 0; + if (token[3] > (int8_t)0xBF) + lookahead = 1; + else if (token[2] > (int8_t)0xBF) + lookahead = 2; + else if (token[1] > (int8_t)0xBF) + lookahead = 3; + + data -= lookahead; + len += lookahead; + } + + return utf8_naive(data, len); +} + +#endif diff --git a/third_party/utf8_range/utf8_range.h b/third_party/utf8_range/utf8_range.h new file mode 100644 index 0000000000..86daa0b5a4 --- /dev/null +++ b/third_party/utf8_range/utf8_range.h @@ -0,0 +1,9 @@ + +#if defined(__ARM_NEON) || defined(__SSE4_1__) +int utf8_range2(const unsigned char* data, int len); +#else +int utf8_naive(const unsigned char* data, int len); +static inline int utf8_range2(const unsigned char* data, int len) { + return utf8_naive(data, len); +} +#endif