| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | bluetooth: Run 'make update-sbc' | Colin Guthrie | 2011-03-20 | 1 | -1/+2 |
| | | | | | Note that changes to ipc.h from 8f3ef04b had to be manually reapplied. | ||||
| * | sbc: added "cc" to the clobber list of mmx inline assembly | Siarhei Siamashka | 2011-03-14 | 1 | -3/+3 |
| | | | | | | | | | | | | | | | | | | | In the case of scale factors calculation optimizations, the inline assembly code has instructions which update flags register, but "cc" was not mentioned in the clobber list. When optimizing code, gcc theoretically is allowed to do a comparison before the inline assembly block, and a conditional branch after it which would lead to a problem if the flags register gets clobbered. While this is apparently not happening in practice with the current versions of gcc, the clobber list needs to be corrected. Regarding the other inline assembly blocks. While most likely it is actually unnecessary based on quick review, "cc" is also added there to the clobber list because it should have no impact on performance in practice. It's kind of cargo cult, but relieves us from the need to track the potential updates of flags register in all these places. | ||||
| * | sbc: MMX optimization for scale factors calculation | Siarhei Siamashka | 2011-03-14 | 1 | -0/+54 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Improves SBC encoding performance when joint stereo is not used. Benchmarked on Pentium-M: == Before: == $ time ./sbcenc -b53 -s8 test.au > /dev/null real 0m1.439s user 0m1.336s sys 0m0.104s samples % image name symbol name 8642 33.7473 sbcenc sbc_pack_frame 5873 22.9342 sbcenc sbc_analyze_4b_8s_mmx 4435 17.3188 sbcenc sbc_calc_scalefactors 4285 16.7331 sbcenc sbc_calculate_bits 1942 7.5836 sbcenc sbc_enc_process_input_8s_be 322 1.2574 sbcenc sbc_encode == After: == $ time ./sbcenc -b53 -s8 test.au > /dev/null real 0m1.319s user 0m1.220s sys 0m0.084s samples % image name symbol name 8706 37.9959 sbcenc sbc_pack_frame 5740 25.0513 sbcenc sbc_analyze_4b_8s_mmx 4307 18.7972 sbcenc sbc_calculate_bits 1937 8.4537 sbcenc sbc_enc_process_input_8s_be 1801 7.8602 sbcenc sbc_calc_scalefactors_mmx 307 1.3399 sbcenc sbc_encode | ||||
| * | build: move sbc related files to its own directory | Luiz Augusto von Dentz | 2011-03-14 | 1 | -0/+320 |
| This should make it easier to apply patches from BlueZ which also uses sbc subdir for this files. | |||||
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