ffmpeg

Commit Graph

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.	2023-02-01 04:23:55 +01:00
James Almer	a8e3833a61	x86/avf_showcqt: use the FMULADD_PS x86util macro Signed-off-by: James Almer <jamrial@gmail.com>	2016-08-20 02:12:33 -03:00
James Almer	172af20852	x86/showcqt: use three operand format for some instructions Fixes failures with yasm 1.1.0 and older Signed-off-by: James Almer <jamrial@gmail.com>	2016-06-08 19:37:08 -03:00
James Almer	7d7fdd6532	x86/showcqt: add missing preprocessor checks Old yasm/nasm versions don't support some of these Signed-off-by: James Almer <jamrial@gmail.com>	2016-06-08 19:34:43 -03:00
James Almer	99b899483e	avutil/x86util: move haddps sse emulation from showcqt Signed-off-by: James Almer <jamrial@gmail.com>	2016-06-08 14:18:00 -03:00
Muhammad Faiz	1e69ac9246	avfilter/avf_showcqt: cqt_calc optimization on x86 on x86_64: time PSNR plain 3.303 inf SSE 1.649 107.087535 SSE3 1.632 107.087535 AVX 1.409 106.986771 FMA3 1.265 107.108437 on x86_32 (PSNR compared to x86_64 plain): time PSNR plain 7.225 103.951979 SSE 1.827 105.859282 SSE3 1.819 105.859282 AVX 1.533 105.997661 FMA3 1.384 105.885377 FMA4 test is not available Reviewed-by: James Almer <jamrial@gmail.com> Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>	2016-06-08 16:09:43 +07:00

6 Commits