mirror of
https://chromium.googlesource.com/libyuv/libyuv
synced 2025-12-06 16:56:55 +08:00
cdd62da670
Bug: libyuv:911 Change-Id: Ic4e7720b4d5c20010470f06a7021d1a2426e765f Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/3381495 Reviewed-by: richard winterton <rrwinterton@gmail.com> Commit-Queue: Frank Barchard <fbarchard@chromium.org>
50 lines
1.4 KiB
Markdown
50 lines
1.4 KiB
Markdown
# Introduction
|
|
|
|
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.
|
|
|
|
# CPU
|
|
|
|
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.
|
|
|
|
## All CPUs
|
|
LIBYUV_DISABLE_ASM
|
|
|
|
## Intel CPUs
|
|
LIBYUV_DISABLE_X86
|
|
LIBYUV_DISABLE_SSE2
|
|
LIBYUV_DISABLE_SSSE3
|
|
LIBYUV_DISABLE_SSE41
|
|
LIBYUV_DISABLE_SSE42
|
|
LIBYUV_DISABLE_AVX
|
|
LIBYUV_DISABLE_AVX2
|
|
LIBYUV_DISABLE_ERMS
|
|
LIBYUV_DISABLE_FMA3
|
|
LIBYUV_DISABLE_F16C
|
|
LIBYUV_DISABLE_AVX512BW
|
|
LIBYUV_DISABLE_AVX512VL
|
|
LIBYUV_DISABLE_AVX512VNNI
|
|
LIBYUV_DISABLE_AVX512VBMI
|
|
LIBYUV_DISABLE_AVX512VBMI2
|
|
LIBYUV_DISABLE_AVX512VBITALG
|
|
LIBYUV_DISABLE_AVX512VPOPCNTDQ
|
|
LIBYUV_DISABLE_GFNI
|
|
|
|
## ARM CPUs
|
|
|
|
LIBYUV_DISABLE_NEON
|
|
|
|
## MIPS CPUs
|
|
LIBYUV_DISABLE_MSA
|
|
LIBYUV_DISABLE_MMI
|
|
|
|
# Test Width/Height/Repeat
|
|
|
|
The unittests default to a small image (128x72) to run fast. This can be set by environment variable to test a specific resolutions.
|
|
You can also repeat the test a specified number of iterations, allowing benchmarking and profiling.
|
|
|
|
set LIBYUV_WIDTH=1280
|
|
set LIBYUV_HEIGHT=720
|
|
set LIBYUV_REPEAT=999
|
|
set LIBYUV_FLAGS=-1
|
|
set LIBYUV_CPU_INFO=-1
|