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common: detect ARM NEON and PMULL target intrinsics

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This commit is contained in:
Eric Biggers 2018-02-18 23:03:26 -08:00
parent 1617206086
commit 8d58d51160
2 changed files with 23 additions and 0 deletions
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6
common/common_defs.h
View File

@ -142,6 +142,12 @@ typedef size_t machine_word_t;
#ifndef COMPILER_SUPPORTS_AVX2_TARGET_INTRINSICS
# define COMPILER_SUPPORTS_AVX2_TARGET_INTRINSICS 0
#endif
#ifndef COMPILER_SUPPORTS_NEON_TARGET_INTRINSICS
# define COMPILER_SUPPORTS_NEON_TARGET_INTRINSICS 0
#endif
#ifndef COMPILER_SUPPORTS_PMULL_TARGET_INTRINSICS
# define COMPILER_SUPPORTS_PMULL_TARGET_INTRINSICS 0
#endif
/* _aligned_attribute(n) - declare that the annotated variable, or variables of
* the annotated type, are to be aligned on n-byte boundaries */

17
common/compiler_gcc.h
View File

@ -86,6 +86,23 @@
# define COMPILER_SUPPORTS_AVX2_TARGET_INTRINSICS \
COMPILER_SUPPORTS_AVX2_TARGET
# endif
# elif defined(__arm__) || defined(__aarch64__)
/*
* Prior to gcc 6.1 (r230411 for arm, r226563 for aarch64), NEON
* and crypto intrinsics not available in the main target could not be
* used in 'target' attribute functions.
*
* clang as of 5.0.1 still doesn't allow it. But, it does seem to allow
* the pmull intrinsics if only __ARM_NEON is enabled.
*/
# define COMPILER_SUPPORTS_NEON_TARGET_INTRINSICS GCC_PREREQ(6, 1)
# ifdef __ARM_NEON
# define COMPILER_SUPPORTS_PMULL_TARGET_INTRINSICS \
(GCC_PREREQ(6, 1) || __has_builtin(__builtin_neon_vmull_p64))
# else
# define COMPILER_SUPPORTS_PMULL_TARGET_INTRINSICS \
(GCC_PREREQ(6, 1))
# endif
# endif
#endif /* COMPILER_SUPPORTS_TARGET_FUNCTION_ATTRIBUTE */