Chiebot-Mirror/FFmpeg - FFmpeg - Gitea: Git with a cup of tea

Author	SHA1	Message	Date
Andreas Rheinhardt	5b85ca5317	avutil/x86/pixelutils: Empty MMX state in ff_pixelutils_sad_8x8_mmxext We currently mostly do not empty the MMX state in our MMX DSP functions; instead we only do so before code that might be using x87 code. This is a violation of the System V i386 ABI (and maybe of other ABIs, too): "The CPU shall be in x87 mode upon entry to a function. Therefore, every function that uses the MMX registers is required to issue an emms or femms instruction after using MMX registers, before returning or calling another function." (See 2.2.1 in [1]) This patch does not intend to change all these functions to abide by the ABI; it only does so for ff_pixelutils_sad_8x8_mmxext, as this function can by called by external users, because it is exported via the pixelutils API. Without this, the following fragment will assert (on x86/x64): uint8_t src1[8 * 8], src2[8 * 8]; av_pixelutils_sad_fn fn = av_pixelutils_get_sad_fn(3, 3, 0, NULL); fn(src1, 8, src2, 8); av_assert0_fpu(); [1]: https://raw.githubusercontent.com/wiki/hjl-tools/x86-psABI/intel386-psABI-1.1.pdf Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	1 year ago
Andreas Rheinhardt	ea043cc53e	avutil/x86/pixelutils: Remove obsolete MMX(EXT) functions x64 always has MMX, MMXEXT, SSE and SSE2 and this means that some functions for MMX, MMXEXT, SSE and 3dnow are always overridden by other functions (unless one e.g. explicitly disables SSE2). So given that the only systems which benefit from the 8x8 MMX (overridden by MMXEXT) or the 16x16 MMXEXT (overridden by SSE2) are truely ancient 32bit x86s they are removed. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	2 years ago
Alexander Kanavin	91326dc942	libavutil: include assembly with full path from source root Otherwise nasm writes the full host-specific paths into .o output, which breaks binary reproducibility. Signed-off-by: Alexander Kanavin <alex.kanavin@gmail.com> Signed-off-by: Anton Khirnov <anton@khirnov.net>	3 years ago
James Almer	d5b3077ecf	x86/pixelutils: add missing preprocessor wrapper to the AVX2 functions Should fix compilation with old yasm/nasm Signed-off-by: James Almer <jamrial@gmail.com>	6 years ago
Jun Zhao	d36b8394f4	avutil/pixelutils: sad_32x32 sse2/avx2 optimizations. add ff_pixelutils_sad_32x32_sse2, ff_pixelutils_sad_{a,u}_32x32_sse2, ff_pixelutils_sad_32x32_avx22, ff_pixelutils_sad_{a,u}_32x32_avx2 use perf record/report profiling, get instructions:u for avx2 sad_32x32: 72.05% pixelutils pixelutils [.] block_sad_32x32_c 18.50% pixelutils pixelutils [.] block_sad_16x16_c 4.78% pixelutils pixelutils [.] block_sad_8x8_c 2.69% pixelutils pixelutils [.] block_sad_4x4_c 0.89% pixelutils pixelutils [.] block_sad_2x2_c 0.16% pixelutils pixelutils [.] ff_pixelutils_sad_32x32_avx2 0.16% pixelutils pixelutils [.] ff_pixelutils_sad_u_32x32_avx2 0.12% pixelutils pixelutils [.] ff_pixelutils_sad_a_32x32_avx2 sse2 sad_32x32 instructions:u like: 71.86% pixelutils pixelutils [.] block_sad_32x32_c 18.42% pixelutils pixelutils [.] block_sad_16x16_c 4.81% pixelutils pixelutils [.] block_sad_8x8_c 2.68% pixelutils pixelutils [.] block_sad_4x4_c 0.88% pixelutils pixelutils [.] block_sad_2x2_c 0.29% pixelutils pixelutils [.] ff_pixelutils_sad_32x32_sse2 0.26% pixelutils pixelutils [.] ff_pixelutils_sad_u_32x32_sse2 0.23% pixelutils pixelutils [.] ff_pixelutils_sad_a_32x32_sse2 Signed-off-by: Jun Zhao <mypopydev@gmail.com>	6 years ago
Jun Zhao	09628cb1b4	avutil/pixelutils: correct the function name in comments Signed-off-by: Jun Zhao <mypopydev@gmail.com>	6 years ago
Henrik Gramner	f0b7882ceb	x86inc: Drop SECTION_TEXT macro The .text section is already 16-byte aligned by default on all supported platforms so `SECTION_TEXT` isn't any different from `SECTION .text`.	9 years ago
Clément Bœsch	554d819062	avutil/pixelutils: faster pixelutils_sad_16x16 501 to 439 decicycles. See `45c7f3997e`.	10 years ago
Clément Bœsch	45c7f3997e	avutil/pixelutils: faster pixelutils_sad_[au]_16x16 ~560 → ~500 decicycles This is following the comments from Michael in https://ffmpeg.org/pipermail/ffmpeg-devel/2014-August/160599.html Using 2 registers for accumulator didn't help. On the other hand, some re-ordering between the movs and psadbw allowed going ~538 to ~500.	10 years ago
Clément Bœsch	28a2107a8d	avutil: add pixelutils API	10 years ago