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Original patch by Aurélien Zanelli <aurelien.zanelli@parrot.com>: http://lists.xiph.org/pipermail/opus/2013-May/002078.html Revised version: - Add autconf detection (ported from libtheora). - Rename ARM5E to ARMv5E (an ARM5 is not the same thing as ARMv5!). - Use actual macros so they can still be selectively overridden. - Split out ARMv4 parts and add a few more ARMv4 macros. - Label blocks to make them easy to find in generated assembly. - Fix MULT16_32_Q15() so we can pass make check. The MDCT test passes in values larger than 2**30 for b. The new version should be just as fast (or faster, since it's easier to merge the shift with following instructions), and there's no appreciable impact on accuracy (FFT/MDCT SNR actually goes up in most cases). - Fix register constraints. We were using early-clobber flags in a bunch of places that didn't need them, and commutative-pair flags in a bunch of places that weren't actually commutative. This was Jean-Marc's fault (the original code came from Speex). - Simplify silk_CLZ16(). - Port over iFFT C_MULC asm by Andree Buschmann <AndreeBuschmann@t-online.de> from Rockbox. - Speed up the C_MULC asm by using LDRD, allowing more flexible addressing, re-ordering instructions to avoid some stalls, allowing more flexible register allocation, and getting things out of the inline asm block so the compiler can schedule them better. - Add C_MUL and C_MUL4 asm for the FFT to the encoder based, on the new C_MULC. In total, this patch gives a 22.3% speed-up on test_opus_encoder on a 600 MHz Cortex A8 using gcc 4.2.1, When restricted to ARMv4 optimizations, it gives a 9.6% speed-up on the same processor/compiler. On the conformance test vectors: Average mono quality is 97.0583 % Average stereo quality is 97.775 % |
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| .. | ||
| dump_modes | ||
| tests | ||
| _kiss_fft_guts.h | ||
| arch.h | ||
| bands.c | ||
| bands.h | ||
| celt.c | ||
| celt.h | ||
| celt.vcxproj | ||
| celt.vcxproj.filters | ||
| celt_decoder.c | ||
| celt_encoder.c | ||
| celt_lpc.c | ||
| celt_lpc.h | ||
| cwrs.c | ||
| cwrs.h | ||
| ecintrin.h | ||
| entcode.c | ||
| entcode.h | ||
| entdec.c | ||
| entdec.h | ||
| entenc.c | ||
| entenc.h | ||
| fixed_armv4.h | ||
| fixed_armv5e.h | ||
| fixed_c5x.h | ||
| fixed_c6x.h | ||
| fixed_debug.h | ||
| fixed_generic.h | ||
| float_cast.h | ||
| kiss_fft.c | ||
| kiss_fft.h | ||
| laplace.c | ||
| laplace.h | ||
| mathops.c | ||
| mathops.h | ||
| mdct.c | ||
| mdct.h | ||
| mfrngcod.h | ||
| modes.c | ||
| modes.h | ||
| opus_custom_demo.c | ||
| os_support.h | ||
| pitch.c | ||
| pitch.h | ||
| quant_bands.c | ||
| quant_bands.h | ||
| rate.c | ||
| rate.h | ||
| stack_alloc.h | ||
| static_modes_fixed.h | ||
| static_modes_float.h | ||
| vq.c | ||
| vq.h | ||