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#include "EXTERN.h" |
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#include "perl.h" |
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#include "XSUB.h" |
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|
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// portable impl |
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#include "crc32csb8.c" |
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|
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static uint32_t (*crc32c) (uint32_t crc, const void *data, size_t length) = crc32cSlicingBy8; |
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|
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// optimized sse4.2 impl |
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#if __GNUC__ >= 8 && (__i386__ || __x86_64__) && __SSE4_2__ /* for __builtin__crc32 */ |
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|
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#include <cpuid.h> |
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#include "crc32intelc.c" |
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|
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static const char * |
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detect (void) |
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{ |
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unsigned int eax, ebx, ecx = 0, edx; |
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|
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__get_cpuid (1, &eax, &ebx, &ecx, &edx); |
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|
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if (ecx & bit_SSE4_2) |
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{ |
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crc32c = crc32cIntelC; |
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return "IntelCSSE42"; |
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} |
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|
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return "SlicingBy8"; |
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} |
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|
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#else |
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|
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static const char * |
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detect (void) |
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{ |
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return "SlicingBy8"; |
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} |
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|
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#endif |
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|
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MODULE = String::CRC32C PACKAGE = String::CRC32C |
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|
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BOOT: |
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sv_setpv (get_sv ("String::CRC32C::IMPL", GV_ADD), detect ()); |
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|
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PROTOTYPES: ENABLE |
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|
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U32 crc32c (SV *data, U32 initvalue = 0) |
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CODE: |
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{ |
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STRLEN len; |
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const char *ptr = SvPVbyte (data, len); |
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RETVAL = ~crc32c (~initvalue, ptr, len); |
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} |
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OUTPUT: RETVAL |
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|
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|
