libav.git - [no description]

	Commit message (Collapse)	Author	Age
*	Consistently use "cpu_flags" as variable/parameter name for CPU flags	Diego Biurrun	2013-07-18
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*	x86: sbrdsp: implement SSE2 qmf_pre_shuffle	Christophe Gisquet	2013-05-10
\| \| \| \| \| \| \|	From 253 to 51 cycles on Arrandale and Win64. 44 cycles on SandyBridge. Signed-off-by: Anton Khirnov <anton@khirnov.net>
*	x86: sbrdsp: Implement SSE2 qmf_deint_bfly	Christophe Gisquet	2013-05-03
\| \| \| \| \| \| \| \| \| \|	Sandybridge: 47 cycles Having a loop counter is a 7 cycle gain. Unrolling is another 7 cycle gain. Working in reverse scan is another 6 cycles. Signed-off-by: Diego Biurrun <diego@biurrun.de>
*	x86: sbrdsp: Implement SSE neg_odd_64	Christophe Gisquet	2013-04-05
\| \| \| \| \| \| \| \| \| \|	Timing on Arrandale: C SSE Win32: 57 44 Win64: 47 38 Unrolling and not storing mask both save some cycles. Signed-off-by: Diego Biurrun <diego@biurrun.de>
*	Add av_cold attributes to arch-specific init functions	Diego Biurrun	2013-02-05
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*	x86: sbrdsp: Implement SSE qmf_post_shuffle	Christophe Gisquet	2013-01-06
\| \| \| \| \| \|	255 to 174 cycles on Arrandale / Win64. Unrolling yields no gain. Signed-off-by: Diego Biurrun <diego@biurrun.de>
*	x86: sbrdsp: Implement SSE sum64x5	Christophe Gisquet	2013-01-06
\| \| \| \| \| \|	698 to 174 cycles on Arrandale. Unrolling is a 6 cycles gain. Signed-off-by: Diego Biurrun <diego@biurrun.de>
*	SBR DSP x86: implement SSE sbr_hf_gen	Christophe Gisquet	2012-12-07
\| \| \| \| \| \| \| \| \| \| \| \|	Start and end index are multiple of 2, therefore guaranteeing aligned access. Also, this allows to generate 4 floats per loop, keeping the alignment all along. Timing: - 32 bits: 326c -> 172c - 64 bits: 323c -> 156c Signed-off-by: Diego Biurrun <diego@biurrun.de>
*	x86: Replace checks for CPU extensions and flags by convenience macros	Diego Biurrun	2012-09-08
\| \| \| \| \|	This separates code relying on inline from that relying on external assembly and fixes instances where the coalesced check was incorrect.
*	SBR DSP x86: implement SSE sbr_hf_g_filt	Christophe GISQUET	2012-02-23
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	Unrolling the main loop to process, instead of 4 elements: - 8: minor gain of 2 cycles (not worth the extra object size) - 2: loss of 8 cycles. Assigning STEP to a register is a loss. Output address (Y) is almost always unaligned. Timings: - C (32/64 bits): 117/109 cycles - SSE: 57 cycles Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
*	SBR DSP x86: implement SSE sbr_sum_square_sse	Christophe GISQUET	2012-02-23
	The 32bits targets have been compiled with -mfpmath=sse for proper reference. sbr_sum_square C /32bits: 82c (unrolled)/102c C /64bits: 69c (unrolled)/82c SSE/32bits: 42c SSE/64bits: 31c Use of SSE4.1 dpps to perform the final sum is slower. Not unrolling to perform 8 operations in a loop yields 10 more cycles. Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>