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author | Matt A. Tobin <email@mattatobin.com> | 2020-04-07 23:30:51 -0400 |
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committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2020-04-14 13:26:42 +0200 |
commit | 277f2116b6660e9bbe7f5d67524be57eceb49b8b (patch) | |
tree | 4595f7cc71418f71b9a97dfaeb03a30aa60f336a /media/libaom/src/av1/encoder/x86/hash_sse42.c | |
parent | d270404436f6e84ffa3b92af537ac721bf10d66e (diff) | |
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Move aom source to a sub-directory under media/libaom
There is no damned reason to treat this differently than any other media lib given its license and there never was.
Diffstat (limited to 'media/libaom/src/av1/encoder/x86/hash_sse42.c')
-rw-r--r-- | media/libaom/src/av1/encoder/x86/hash_sse42.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/media/libaom/src/av1/encoder/x86/hash_sse42.c b/media/libaom/src/av1/encoder/x86/hash_sse42.c new file mode 100644 index 000000000..65fa46311 --- /dev/null +++ b/media/libaom/src/av1/encoder/x86/hash_sse42.c @@ -0,0 +1,51 @@ +/* + * Copyright (c) 2018, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <stdint.h> +#include <smmintrin.h> + +// Byte-boundary alignment issues +#define ALIGN_SIZE 8 +#define ALIGN_MASK (ALIGN_SIZE - 1) + +#define CALC_CRC(op, crc, type, buf, len) \ + while ((len) >= sizeof(type)) { \ + (crc) = op((crc), *(type *)(buf)); \ + (len) -= sizeof(type); \ + buf += sizeof(type); \ + } + +/** + * Calculates 32-bit CRC for the input buffer + * polynomial is 0x11EDC6F41 + * @return A 32-bit unsigned integer representing the CRC + */ +uint32_t av1_get_crc32c_value_sse4_2(void *crc_calculator, uint8_t *p, + size_t len) { + (void)crc_calculator; + const uint8_t *buf = p; + uint32_t crc = 0xFFFFFFFF; + + // Align the input to the word boundary + for (; (len > 0) && ((intptr_t)buf & ALIGN_MASK); len--, buf++) { + crc = _mm_crc32_u8(crc, *buf); + } + +#ifdef __x86_64__ + uint64_t crc64 = crc; + CALC_CRC(_mm_crc32_u64, crc64, uint64_t, buf, len); + crc = (uint32_t)crc64; +#endif + CALC_CRC(_mm_crc32_u32, crc, uint32_t, buf, len); + CALC_CRC(_mm_crc32_u16, crc, uint16_t, buf, len); + CALC_CRC(_mm_crc32_u8, crc, uint8_t, buf, len); + return (crc ^= 0xFFFFFFFF); +} |