- Route 32-bit x86 (__i386__ / _M_IX86) to compare_win.cc intrinsics
and restrict compare_gcc.cc to 64-bit x86 (__x86_64__), avoiding
x87 float rounding and enabling SSE2, AVX2, and AVX-512 on 32-bit
and 64-bit MinGW, GCC, Clang, and MSan (LIBYUV_ENABLE_ROWWIN).
- Enable AVX-512BW on GCC >= 6 (GCC_HAS_AVX512) and add
LIBYUV_TARGET_AVX512BW attributes to compare_gcc.cc and
compare_win.cc.
- Refactor SsimWindowRow_C and Ssim8x8_C to use int32_t and float,
and add SsimWindowRow_SSE2, SsimWindowRow_AVX2, and
SsimWindowRow_AVX512BW in both compare_win.cc and compare_gcc.cc.
- Update TestSsimAnyWidth, Ssim, and BenchmarkSsim_Opt in
compare_test.cc to use EXPECT_NEAR and deterministic test patterns
(identical, different, similar).
- Update util/compare.cc and linux.mk to compute I420Ssim.
Performance (BenchmarkSsim_Opt, 1280x720):
uArch Before After Improvement
Intel Lion Cove (x64 AVX2) 120.2 us 68.1 us 1.76x
Intel Skymont (x64 SSE2) 249.6 us 146.8 us 1.70x
AMD Zen 3 (x64 AVX2) 314.9 us 150.2 us 2.10x
Intel Lion Cove (MinGW686) 203.7 us 77.9 us 2.61x
Intel Skymont (MinGW686) 338.8 us 167.5 us 2.02x
AMD Zen 3 (i686 AVX2) 738.4 us 206.5 us 3.58x
Quality (util/compare on 640x360 I420 test images):
Image Comparison MSE PSNR SSIM
Identical (orig vs orig) 0.00 128.00 dB 1.000000
Similar (light +/-3 noise) 4.57 41.53 dB 0.956556
Degraded (16x16 blocky) 98.18 28.21 dB 0.858893
Very different (inverted) 11160.29 7.65 dB 0.000181
Co-authored-by: Martin Storsjö <martin@martin.st>
Bug: b/493910265
Test: out/Release/libyuv_unittest --gtest_filter=*Ssim*
Change-Id: I8603dab3f752af32d07ae9039502ca5da5a05425
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8618641
Reviewed-by: richard winterton <rrwinterton@gmail.com>
Commit-Queue: Frank Barchard <fbarchard@google.com>
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