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https://chromium.googlesource.com/libyuv/libyuv
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aa47d668d8
* Supports: * The standard single-letter Vector detection. * Vector fp16 detection. Signed-off-by: Darren Hsieh <darren.hsieh@sifive.com> Change-Id: Ia7ee1bd8ec1a990f1b2b1700805942e99c0aa87b Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/4401738 Commit-Queue: Frank Barchard <fbarchard@chromium.org> Reviewed-by: Frank Barchard <fbarchard@chromium.org>
56 lines
1.5 KiB
Markdown
56 lines
1.5 KiB
Markdown
# Introduction
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For test purposes, environment variables can be set to control libyuv behavior. These should only be used for testing, to narrow down bugs or to test performance.
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# CPU
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By default the cpu is detected and the most advanced form of SIMD is used. But you can disable instruction sets selectively, or completely, falling back on C code. Set the variable to 1 to disable the specified instruction set.
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## All CPUs
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LIBYUV_DISABLE_ASM
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## Intel CPUs
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LIBYUV_DISABLE_X86
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LIBYUV_DISABLE_SSE2
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LIBYUV_DISABLE_SSSE3
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LIBYUV_DISABLE_SSE41
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LIBYUV_DISABLE_SSE42
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LIBYUV_DISABLE_AVX
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LIBYUV_DISABLE_AVX2
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LIBYUV_DISABLE_ERMS
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LIBYUV_DISABLE_FMA3
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LIBYUV_DISABLE_F16C
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LIBYUV_DISABLE_AVX512BW
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LIBYUV_DISABLE_AVX512VL
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LIBYUV_DISABLE_AVX512VNNI
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LIBYUV_DISABLE_AVX512VBMI
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LIBYUV_DISABLE_AVX512VBMI2
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LIBYUV_DISABLE_AVX512VBITALG
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LIBYUV_DISABLE_AVX512VPOPCNTDQ
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LIBYUV_DISABLE_GFNI
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## ARM CPUs
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LIBYUV_DISABLE_NEON
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## MIPS CPUs
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LIBYUV_DISABLE_MSA
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## LOONGARCH CPUs
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LIBYUV_DISABLE_LSX
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LIBYUV_DISABLE_LASX
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## RISCV CPUs
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LIBYUV_DISABLE_RVV
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# Test Width/Height/Repeat
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The unittests default to a small image (128x72) to run fast. This can be set by environment variable to test a specific resolutions.
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You can also repeat the test a specified number of iterations, allowing benchmarking and profiling.
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set LIBYUV_WIDTH=1280
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set LIBYUV_HEIGHT=720
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set LIBYUV_REPEAT=999
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set LIBYUV_FLAGS=-1
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set LIBYUV_CPU_INFO=-1
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