From: Siarhei Siamashka <siarhei.siamashka@xxxxxxxxx> This patch series adds a bunch of ARM assembly optimizations. Now all the functions from 'sbc_primitives.c' got NEON optimized variants. As benchmarked with the common A2DP case (44100kHz audio with bitpool set to 53, 8 subbands, joint stereo), SBC encoding is now approximately 1.6x faster overall when compared to bluez-4.66. Some more room for improvement still exists though. For ARMv6 processors, only analysis filter has been implemented (using dual 16-bit multiply-accumulate instructions). But that's the most important optimization and it doubles performance already. And older processors such as ARM11 are much slower, so they definitely benefit more on a relative scale (Nokia N800/N810 users may find this update useful). All the optimizations are bitexact. Given the same input, they provide the same output as the SBC encoder from the previous bluez versions. Patches are also available in the branch 'sbc-arm-optimizations' here: git://gitorious.org/system-performance/bluez-sbc.git Siarhei Siamashka (5): sbc: ARM NEON optimized joint stereo processing in SBC encoder sbc: ARM NEON optimizations for input permutation in SBC encoder sbc: slightly faster 'sbc_calc_scalefactors_neon' sbc: faster 'sbc_calculate_bits' function sbc: ARMv6 optimized version of analysis filter for SBC encoder Makefile.am | 3 +- sbc/sbc.c | 43 ++- sbc/sbc_primitives.c | 4 + sbc/sbc_primitives_armv6.c | 299 +++++++++++++++++++++ sbc/sbc_primitives_armv6.h | 52 ++++ sbc/sbc_primitives_neon.c | 618 ++++++++++++++++++++++++++++++++++++++++++- 6 files changed, 988 insertions(+), 31 deletions(-) create mode 100644 sbc/sbc_primitives_armv6.c create mode 100644 sbc/sbc_primitives_armv6.h -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
