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4 Commits

Author SHA1 Message Date
Eric Biggers
2eeaa9282e lib/arm/cpu_features: recognize the crc32 feature 
If support for CRC32 instructions is detected, set
ARM_CPU_FEATURE_CRC32.  Also define
COMPILER_SUPPORTS_CRC32_TARGET_INTRINSICS when appropriate, and update
run_tests.sh to toggle the crc32 feature for testing.
 2020-10-10 23:03:50 -07:00
Eric Biggers
5729095d2d lib/cpu_features: support disabling CPU features for testing 
Make test-only builds of libdeflate support an environmental variable
LIBDEFLATE_DISABLE_CPU_FEATURES that contains a list of CPU features to
disable like "avx512bw,avx2,sse2".

This makes it possible to test all the variants of dynamically
dispatched code without editing the source code.

Note, this environmental variable is not a stable interface, so put the
support for it behind a scary-looking option TEST_SUPPORT__DO_NOT_USE.
 2020-10-05 00:35:19 -07:00
Eric Biggers
6eef15d6f3 lib/arm: fix PMULL detection on AArch64 2018-03-03 12:47:50 -08:00
Eric Biggers
2575ede5ff lib/arm: add ARM CPU feature detection (Linux only for now) 2018-02-18 23:03:26 -08:00