FFmpeg

Commit Graph

Author	SHA1	Message	Date
Reimar Döffinger	d55f46e5a8	Reenable AMD64 optimizations for cabac accidentially disabled in r6852 Originally committed as revision 6853 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	419b878494	Add ARCH_X86_32 as a new define for 32 bit x86 architectures and change the semantics of ARCH_X86 to mean both 32 and 64 bits. Originally committed as revision 6852 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	d5cd50ed73	Fix compilation with PIC enabled, BRANCHLESS_GET_CABAC is defined under !PIC but gets used without a check for !PIC. Originally committed as revision 6834 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Reimar Döffinger	755073fe3c	CABAC assembler optimizations ported to AMD64 Originally committed as revision 6776 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	e08f580644	decode_significance_8x8_x86() 8% faster decode_cabac_residual() (8x8 case only) on P3 Originally committed as revision 6750 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Guillaume Poirier	94e4c3a333	Protect code that uses CMOV instructions with HAVE_CMOV, Make configure set CMOV_IS_FAST on arches on which cmov has a low latency (typically non-Netburst based processor) Originally committed as revision 6749 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	849a50041c	another instruction less in decode_significance_x86() -> 1% faster ion P3 Originally committed as revision 6745 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	d3e7c5c35b	1 instruction less Originally committed as revision 6743 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	a616db285a	reordering instructions a little in decode_significance_x86() -> 2 instructions less / 1% faster decode_residual on P3 Originally committed as revision 6741 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	13404b2e98	factorize get_cabac asm (0.5% slower but its much cleaner) Originally committed as revision 6740 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Bernhard Rosenkränzer	ba9fb5da3a	Fix PIC compilation, some defines were under #ifdef !PIC but used in the PIC case nevertheless. patch by Bernhard Rosenkranzer, bero arklinux org Originally committed as revision 6738 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	d72bc32389	unused variable Originally committed as revision 6737 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	ebd624b662	optimize sign decoding code in decode_residual() x86 is 4% faster on P3 C sign stuff + x86 code for everything else is also faster then before (sorry forgot to test pure C) ... and if i replace the second occurance of the sign decoding in decode_residual by the asm too then everything gets slower iam starting to think that it might be best to write the whole function in asm, playing this avoid random deoptimizations game with gcc is not fun at all Originally committed as revision 6732 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Jindřich Makovička	a0f2c6ba38	Kill a warning with MSVC Patch by Jindrich Makovicka makovick A gmail P com Original thread: Date: 08:21 AM Subject Re: [Ffmpeg-devel] Weird line in cabac.h Originally committed as revision 6726 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	eb73bf723d	x86 asm version of the decode significance loop (not 8x8) of decode_residual() 5% faster decode_residual() on P3 Originally committed as revision 6724 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	4041a495a8	cosmetic (%%eax->%0) Originally committed as revision 6717 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	8dda3e796b	Fix crash with illegal instruction, cmov is available on 686 and later only. Originally committed as revision 6715 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	e962604f1c	Expand some #endif comments. Originally committed as revision 6714 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	165c5f0909	fix !CMOV_IS_FAST case (iam not really happy with the fix but i didnt come up with a better one quickly) Originally committed as revision 6707 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	1d7c111856	10l Originally committed as revision 6704 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	faff3a7ad0	this code will not work with PIC as it needs 7 registers and gcc doesnt support that in PIC Originally committed as revision 6703 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	f24a515931	shift CABACContext.range right, this reduces the number of shifts needed in get_cabac() and is slightly faster on P3 (and should be much faster on P4 as the P4 except the more recent variants lacks an integer shifter and so shifts have ~10 times longer latency then simple operations like adds) Originally committed as revision 6702 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	68a205edef	dehack *ps_state indexing in the branchless decoder Originally committed as revision 6683 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	12ff5b0f3b	add "memory" to the clobber list we change memory so we need it, this also fixes some problems with gcc svn Originally committed as revision 6679 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	851ded8918	prevent "mb level" get_cabac() calls from being inlined (3% faster decode_mb_cabac() on P3) Originally committed as revision 6674 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Guillaume Poirier	a0490b324a	adds some useful comments after some of the #else, #elseif, #endif preprocessor directives to make it clearer which code block depends on which #define xx Originally committed as revision 6668 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	c26abfa541	Rename ABS macro to FFABS. Originally committed as revision 6666 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	1f4d5e9f69	slightly faster on P3 slightly slower on athlon and probably faster on P4 Originally committed as revision 6663 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2b5269b51c	moving lps state transition code a little up in the branched asm code (1% faster on P3) Originally committed as revision 6658 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	b99f3cabed	write cabac low and range variables as early as possible to prevent stalls from reading them before they where written, the P4 is said to disslike that alot, on P3 its 2% faster (START/STOP_TIMER over decode_residual) Originally committed as revision 6657 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	d17faef011	use ecx instead of cl (no speed change on P3 but might avoid partial register stalls on some cpus) Originally committed as revision 6656 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	d61c4e731e	make state transition tables global as they are constant and the code is slightly faster that way Originally committed as revision 6655 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	5f3eca121e	10l Originally committed as revision 6654 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	0fa352c7e6	make lps_range a global table its constant anyway (saves 1 addition for accessing it) Originally committed as revision 6653 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	3650b43959	enable CMOV_IS_FAST as its faster or equal speed on every cpu (duron, athlon, PM, P3) from which ive seen benchmarks, it might be slower on P4 but noone has posted benchmarks ... Originally committed as revision 6652 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Diego Biurrun	0bc2e7f081	BRANCHLESS_CABAD --> BRANCHLESS_CABAC_DECODER Originally committed as revision 6623 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	9ed92c65f1	moving another bit&1 out, this is as fast as with it in there, but it makes more sense with it outside of the loop Originally committed as revision 6618 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	f1b37db48d	move the &1 out of the asm so gcc can optimize it away in inlined cases (yes this is slightly faster) Originally committed as revision 6616 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	ab0151d163	replace a few and/sub/... by cmov this is faster on P3, should be faster on AMD, and should be slower on P4 its disabled by default (benchmarks welcome so we know when to enable it) Originally committed as revision 6615 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	a6672acf45	reading 8bit mem into a 8bit register needs 2 uops on P4, 8bit->32bit with zero extension needs just 1 Originally committed as revision 6612 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2d3df05ca0	on the P4 inc needs twice as much time a add Originally committed as revision 6611 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2ee9dc65be	10l Originally committed as revision 6610 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	7822e1c1ff	reverse remainder of the failed attempt to optimize *state=c->mps_state[s] Originally committed as revision 6609 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	ef0090a998	x86 branchless cabac decoder slightly faster on P3 Originally committed as revision 6608 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	2e1aee80f4	optimize branchless C CABAC decoder Originally committed as revision 6607 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	1c2a417f6a	move outcommented START/STOP_TIMER to a hopefully better place for benchmarking ... Originally committed as revision 6605 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	30dc5f56ad	drop failed attempt to optimize *state= c->mps_state[s]; Originally committed as revision 6604 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	c56d23dacf	10l bugfix for some disabled code Originally committed as revision 6603 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	f7d0b68361	first try of a handwritten get_cabac() for x86, this is 10-20% faster on P3 depening on if you try to subtract the START/STOP_TIMER overhead Originally committed as revision 6602 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago
Michael Niedermayer	5bbe2a5292	remove bytestream_end checks, seems to work fine without them and the bitstream reader doesnt check for the end either Originally committed as revision 6599 to svn://svn.ffmpeg.org/ffmpeg/trunk	18 years ago

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76 Commits (6c4d16556b96dae18977fddad3a43faaed579993)