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arm: Add a compile-time assertion about PNG_ARM_NEON_CHECK_SUPPORTED 

Following up on the previous commit by Martin Storsjö:

If the availability of ARM Neon is not only known at compile time,
but also expected by the compiler's target architecture, there should
be no further need for a run-time check. In fact, such a check would
be counter-productive.
libpng16
Cosmin Truta 2022-10-12 12:42:09 +03:00
parent e56f79c0c6
commit b8ca9108ac
1 changed files with 4 additions and 1 deletions
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5
arm/arm_init.c
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@ -36,7 +36,10 @@
#ifndef PNG_ARM_NEON_FILE
# if defined(__aarch64__) || defined(_M_ARM64)
/* ARM Neon is expected to be unconditionally available on ARM64. */
# error "PNG_ARM_NEON_CHECK_SUPPORTED must not be defined on this platform"
# error "PNG_ARM_NEON_CHECK_SUPPORTED must not be defined on ARM64"
# elif defined(__ARM_NEON__) || defined(__ARM_NEON)
/* ARM Neon is expected to be available on the target CPU architecture. */
# error "PNG_ARM_NEON_CHECK_SUPPORTED must not be defined on this CPU arch"
# elif defined(__linux__)
# define PNG_ARM_NEON_FILE "contrib/arm-neon/linux.c"
# else