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Prevent perf regressions in mbedtls_xor

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
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Dave Rodgman
2022-12-30 21:32:03 +00:00
parent 051225d07a
commit b9cd19bc8c
3 changed files with 17 additions and 11 deletions
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13
library/alignment.h
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@@ -29,6 +29,19 @@
#include "mbedtls/build_info.h"
/*
* Define MBEDTLS_EFFICIENT_UNALIGNED_ACCESS for architectures where unaligned memory
* accesses are known to be safe and efficient.
*/
#if defined(__ARM_FEATURE_UNALIGNED) \
|| defined(__i386__) || defined(__amd64__) || defined(__x86_64__)
/*
* __ARM_FEATURE_UNALIGNED is defined where appropriate by armcc, gcc 7, clang 9
* (and later versions); all x86 platforms should have efficient unaligned access.
*/
#define MBEDTLS_EFFICIENT_UNALIGNED_ACCESS
#endif
/**
* Read the unsigned 16 bits integer from the given address, which need not
* be aligned.