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Use proper unaligned access attributes

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Instead of using packed attribute hack, just use aligned attribute. It
improves code generation on armv6 and armv7, and slightly improves code
generation on aarch64. GCC generates identical code to regular aligned
access on ARMv6 for all versions between 4.5 and trunk, except GCC 5
which is buggy and generates the same (bad) code as packed access:
https://gcc.godbolt.org/z/hq37rz7sb
This commit is contained in:
Alex Xu (Hello71)
2021-11-28 21:54:24 -05:00
committed by Nick Terrell
parent fbff7827fa
commit a78c91ae59
10 changed files with 106 additions and 167 deletions
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contrib/linux-kernel/Makefile
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@ -34,7 +34,6 @@ libzstd:
-DFSE_STATIC_LINKING_ONLY \
-DHUF_STATIC_LINKING_ONLY \
-DXXH_STATIC_LINKING_ONLY \
-DMEM_FORCE_MEMORY_ACCESS=0 \
-D__GNUC__ \
-D__linux__=1 \
-DSTATIC_BMI2=0 \