1# Introduction 2 3For 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. 4 5# CPU 6 7By 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. 8 9## All CPUs 10 LIBYUV_DISABLE_ASM 11 12## Intel CPUs 13 LIBYUV_DISABLE_X86 14 LIBYUV_DISABLE_SSE2 15 LIBYUV_DISABLE_SSSE3 16 LIBYUV_DISABLE_SSE41 17 LIBYUV_DISABLE_SSE42 18 LIBYUV_DISABLE_AVX 19 LIBYUV_DISABLE_AVX2 20 LIBYUV_DISABLE_ERMS 21 LIBYUV_DISABLE_FMA3 22 LIBYUV_DISABLE_F16C 23 LIBYUV_DISABLE_AVX512BW 24 LIBYUV_DISABLE_AVX512VL 25 LIBYUV_DISABLE_AVX512VBMI 26 LIBYUV_DISABLE_AVX512VBMI2 27 LIBYUV_DISABLE_AVX512VBITALG 28 LIBYUV_DISABLE_AVX512VPOPCNTDQ 29 LIBYUV_DISABLE_GFNI 30 31## ARM CPUs 32 33 LIBYUV_DISABLE_NEON 34 35## MIPS CPUs 36 LIBYUV_DISABLE_MSA 37 LIBYUV_DISABLE_MMI 38 39# Test Width/Height/Repeat 40 41The unittests default to a small image (128x72) to run fast. This can be set by environment variable to test a specific resolutions. 42You can also repeat the test a specified number of iterations, allowing benchmarking and profiling. 43 44 set LIBYUV_WIDTH=1280 45 set LIBYUV_HEIGHT=720 46 set LIBYUV_REPEAT=999 47 set LIBYUV_FLAGS=-1 48 set LIBYUV_CPU_INFO=-1 49