Tag: Branch: Tree: a30adf9f96

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Commit Graph

6 Commits (a30adf9f96254f4870066c98a6dbf13fc74515a3)

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
Alan Kelly	a6724285fd	sws: allow avx2 hscale to process inputs of any size. ... The main loop processes blocks of 16 pixels. The tail processes blocks of size 4. Signed-off-by: Anton Khirnov <anton@khirnov.net>	2 years ago
James Almer	eab91c3e2e	x86/scale_avx2: don't use $ for hex literals ... Fixes compilation with AVX2 enabled yasm. Signed-off-by: James Almer <jamrial@gmail.com>	3 years ago
Alan Kelly	9092e58c44	x86/scale_avx2: Change asm indent from 2 to 4 spaces. ... Signed-off-by: James Almer <jamrial@gmail.com>	3 years ago
James Almer	76a3f961f8	x86/scale_avx2: add missing check for AVX2 assembler support ... Should fix compilation with old yasm. Signed-off-by: James Almer <jamrial@gmail.com>	3 years ago
Alan Kelly	f900a19fa9	libswscale: Adds ff_hscale8to15_4_avx2 and ff_hscale8to15_X4_avx2 for all filter sizes. ... Fixes so that fate under 64 bit Windows passes. These functions replace all ff_hscale8to15_*_ssse3 when avx2 is available. Signed-off-by: James Almer <jamrial@gmail.com>	3 years ago