Process 8 lines at a time rather than 16 lines at a time because this appears to give more reliable memory subsystem performance on Haswell. Speedup is > 2x as compared to SSE2 when not memory-bound on Haswell. On my Haswell MBP, VAACalcSadSsdBgd is about ~3x faster when uncached, which appears to be related to processing 8 lines at a time as opposed to 16 lines at a time. The other routines are also faster as compared to the SSE2 routines in this case but to a lesser extent.
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| @@ -828,6 +828,12 @@ GENERATE_VAACalcSadBgd_UT (VAACalcSadBgd_sse2, 1, WELS_CPU_SSE2) · 827 unmodified lines | ||
| 828 | 828 | GENERATE_VAACalcSadSsdBgd_UT (VAACalcSadSsdBgd_sse2, 1, WELS_CPU_SSE2) |
| 829 | 829 | GENERATE_VAACalcSadSsd_UT (VAACalcSadSsd_sse2, 1, WELS_CPU_SSE2) |
| 830 | 830 | GENERATE_VAACalcSadVar_UT (VAACalcSadVar_sse2, 1, WELS_CPU_SSE2) |
| 831 | + | |
| 832 | +GENERATE_VAACalcSad_UT (VAACalcSad_avx2, 1, WELS_CPU_AVX2) | |
| 833 | +GENERATE_VAACalcSadBgd_UT (VAACalcSadBgd_avx2, 1, WELS_CPU_AVX2) | |
| 834 | +GENERATE_VAACalcSadSsdBgd_UT (VAACalcSadSsdBgd_avx2, 1, WELS_CPU_AVX2) | |
| 835 | +GENERATE_VAACalcSadSsd_UT (VAACalcSadSsd_avx2, 1, WELS_CPU_AVX2) | |
| 836 | +GENERATE_VAACalcSadVar_UT (VAACalcSadVar_avx2, 1, WELS_CPU_AVX2) | |
| 831 | 837 | #endif |
| 832 | 838 | |
| 833 | 839 | #if defined(HAVE_NEON) |