b6c4a5447c
At lower bitrates, it is overall faster to conditionally do one block at a time with SSE2 on Haswell and likely other common architectures. At higher bitrates, it is faster to use the wider routine that IDCTs four blocks at a time. To avoid potential performance regressions as compared to MMX, stick with single-block IDCTs with SSE2. There is still a performance advantage as compared to MMX because the single-block SSE2 routine is faster than the corresponding MMX routine. Stick with four blocks at a time with AVX2 for which that appears to be consistently faster on Haswell. |
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| .. | ||
| arm | ||
| arm64 | ||
| inc | ||
| src | ||
| x86 | ||
| generate_version.sh | ||
| targets.mk | ||