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The optimized filter gets enabled when the code is compiled with -mcpu=/-march options set to target the processors which support ARMv6 instructions. This code is also disabled when NEON is used (which is a lot better alternative). For additional safety ARM EABI is required and thumb mode should not be used. Benchmarks from ARM11: == 8 subbands == $ time ./sbcenc -b53 -s8 -j test.au > /dev/null real 0m 35.65s user 0m 34.17s sys 0m 1.28s $ time ./sbcenc.armv6 -b53 -s8 -j test.au > /dev/null real 0m 17.29s user 0m 15.47s sys 0m 0.67s == 4 subbands == $ time ./sbcenc -b53 -s4 -j test.au > /dev/null real 0m 25.28s user 0m 23.76s sys 0m 1.32s $ time ./sbcenc.armv6 -b53 -s4 -j test.au > /dev/null real 0m 18.64s user 0m 15.78s sys 0m 2.22s |
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| .. | ||
| formats.h | ||
| sbc_math.h | ||
| sbc_primitives_armv6.c | ||
| sbc_primitives_armv6.h | ||
| sbc_primitives_mmx.c | ||
| sbc_primitives_mmx.h | ||
| sbc_primitives_neon.c | ||
| sbc_primitives_neon.h | ||
| sbc_primitives.c | ||
| sbc_primitives.h | ||
| sbc_tables.h | ||
| sbc.c | ||
| sbc.h | ||
| sbcdec.c | ||
| sbcenc.c | ||
| sbcinfo.c | ||
| sbctester.c | ||