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Commit Graph

8 Commits (2b0fe529674e91bd55b52512f9a2bb0658ce0f7c)

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	8bec225c3c	swscale/x86/yuv2yuvX: Remove unused ff_yuv2yuvX_mmx() ... Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>	2 years ago
Alan Kelly	3ce8d09244	libswscale/x86/yuv2yuvX: Removes unrolling for mmx and mmxext ... Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>	4 years ago
James Almer	1a555d3c60	swscale/x86/yuv2yuvX: use the movsxdifnidn helper macro ... Simplifies code Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
James Almer	ebb48d85a0	swscale/x86/yuv2yuvX: use movq to load 8 bytes in all non-AVX2 functions ... mova expands to movq on non-XMM functions Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
James Almer	d512ebbaed	swscale/x86/yuv2yuvX: use the SPLATW helper macro ... Simplifies code Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
James Almer	c2bf1dcace	swscale/x86/swscale: fix compilation with old yasm ... Where AVX2 may not be supported. Signed-off-by: James Almer <jamrial@gmail.com>	4 years ago
Alan Kelly	554c2bc708	swscale: move yuv2yuvX_sse3 to yasm, unrolls main loop ... And other small optimizations for ~20% speedup.	4 years ago