FFmpeg

400 Tags

492 MiB

Author	SHA1	Message	Date
Lynne	bbe95f7353	x86: replace explicit REP_RETs with RETs From x86inc: > On AMD cpus <=K10, an ordinary ret is slow if it immediately follows either > a branch or a branch target. So switch to a 2-byte form of ret in that case. > We can automatically detect "follows a branch", but not a branch target. > (SSSE3 is a sufficient condition to know that your cpu doesn't have this problem.) x86inc can automatically determine whether to use REP_RET rather than REP in most of these cases, so impact is minimal. Additionally, a few REP_RETs were used unnecessary, despite the return being nowhere near a branch. The only CPUs affected were AMD K10s, made between 2007 and 2011, 16 years ago and 12 years ago, respectively. In the future, everyone involved with x86inc should consider dropping REP_RETs altogether.	2 years ago
Andreas Rheinhardt	4011a76494	avcodec/x86/h264_qpel: Remove obsolete MMXEXT functions x64 always has MMX, MMXEXT, SSE and SSE2 and this means that some functions for MMX, MMXEXT and 3dnow are always overridden by other functions (unless one e.g. explicitly disables SSE2) for x64. So given that the only systems that benefit from these functions are truely ancient 32bit x86s they are removed. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Andreas Rheinhardt	8678b75bda	avcodec/x86/h264_qpel_8bit: Remove unused function Namely ff_avg_h264_qpel8or16_hv1_lowpass_op_mmxext. It seems to exist since `610e00b359` (a function like this already existed before that commit, but it was static and av_always_inline and was therefore not present in the actual binaries). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	3 years ago
Diego Biurrun	e8c52271c4	Revert "Move H264/QPEL specific asm from dsputil.asm to h264_qpel_*.asm." This reverts commit `f90ff772e7`. The code should be put back in h264_qpel_8bit.asm, but unfortunately it is unconditionally used from dsputil_mmx.c since `71155d7`.	12 years ago
Ronald S. Bultje	f90ff772e7	Move H264/QPEL specific asm from dsputil.asm to h264_qpel_*.asm.	12 years ago
Justin Ruggles	2d3993ce8c	x86: h264 qpel: use the correct number of utilized xmm regs in cglobal Fixes xmm register clobbering on win64.	12 years ago
Daniel Kang	610e00b359	x86: h264: Convert 8-bit QPEL inline assembly to YASM Signed-off-by: Diego Biurrun <diego@biurrun.de>	12 years ago

11 Commits (e2637a083ae2876d55adafad6bddf698fe09da3f)