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lib/arm: NEON intrinsics require hardware floating point support

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NEON intrinsics cannot be used when compiling for an ARM CPU without
hardware floating point support, e.g. the Debian armel port.  In this
case arm_neon.h cannot even be included as it causes an #error.

[Based on a patch by Adrian Bunk <bunk@debian.org>, but changed to check
 for __ARM_FP instead of !__SOFTFP__ to be consistent with arm_neon.h,
 and added a comment.]
This commit is contained in:
Eric Biggers 2018-12-22 00:00:04 -06:00
parent d6d50c6955
commit becd91bb63
1 changed files with 3 additions and 1 deletions
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4
common/compiler_gcc.h
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@ -86,7 +86,9 @@
# define COMPILER_SUPPORTS_AVX2_TARGET_INTRINSICS \
COMPILER_SUPPORTS_AVX2_TARGET
# endif
# elif defined(__arm__) || defined(__aarch64__)
# elif (defined(__arm__) && defined(__ARM_FP)) || defined(__aarch64__)
/* arm: including arm_neon.h requires hardware fp support */
/*
* Prior to gcc 6.1 (r230411 for arm, r226563 for aarch64), NEON
* and crypto intrinsics not available in the main target could not be