diff options
| author | Mika Lindqvist <postmaster@raasu.org> | 2018-03-13 11:26:19 +0200 |
|---|---|---|
| committer | Hans Kristian Rosbach <hk-github@circlestorm.org> | 2018-10-30 12:36:32 +0100 |
| commit | e7e80f4cd22346a2ea3cadad57ed574078aa5576 (patch) | |
| tree | 9b4c67eace11668d1ff3d2903219c835c1eda075 /functable.c | |
| parent | bf1da691b2e18928e51b6d95214ffcf6735e10bb (diff) | |
[ARM/AArch64] Add run-time detection of ACLE and NEON instructions under Linux.
* Use getauxval() to check support for ACLE CRC32 instructions
* Allow disabling CRC32 instruction check
Diffstat (limited to 'functable.c')
| -rw-r--r-- | functable.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/functable.c b/functable.c index e0f0e40..93fbd23 100644 --- a/functable.c +++ b/functable.c @@ -12,6 +12,9 @@ #if defined(X86_CPUID) # include "arch/x86/x86.h" +#elif (defined(__arm__) || defined(__aarch64__) || defined(_M_ARM)) +extern int arm_has_crc32(); +extern int arm_has_neon(); #endif @@ -65,7 +68,8 @@ ZLIB_INTERNAL Pos insert_string_stub(deflate_state *const s, const Pos str, unsi #ifdef X86_SSE4_2_CRC_HASH if (x86_cpu_has_sse42) functable.insert_string=&insert_string_sse; - #elif defined(ARM_ACLE_CRC_HASH) + #elif defined(__ARM_FEATURE_CRC32) && defined(ARM_ACLE_CRC_HASH) + if (arm_has_crc32()) functable.insert_string=&insert_string_acle; #endif @@ -93,6 +97,7 @@ ZLIB_INTERNAL uint32_t adler32_stub(uint32_t adler, const unsigned char *buf, si functable.adler32=&adler32_c; #if ((defined(__ARM_NEON__) || defined(__ARM_NEON)) && defined(ARM_NEON_ADLER32)) + if (arm_has_neon()) functable.adler32=&adler32_neon; #endif @@ -113,10 +118,10 @@ ZLIB_INTERNAL uint32_t crc32_stub(uint32_t crc, const unsigned char *buf, uint64 if (sizeof(void *) == sizeof(ptrdiff_t)) { #if BYTE_ORDER == LITTLE_ENDIAN -# if __ARM_FEATURE_CRC32 + functable.crc32=crc32_little; +# if __ARM_FEATURE_CRC32 && defined(ARM_ACLE_CRC_HASH) + if (arm_has_crc32()) functable.crc32=crc32_acle; -# else - functable.crc32=crc32_little; # endif #elif BYTE_ORDER == BIG_ENDIAN functable.crc32=crc32_big; |