| 1 |
#include "EXTERN.h" |
| 2 |
#include "perl.h" |
| 3 |
#include "XSUB.h" |
| 4 |
|
| 5 |
#include "perlmulticore.h" |
| 6 |
|
| 7 |
/* windows perl pisses me off. 26 years since c99, and still we have broken headers */ |
| 8 |
/* this has been copied from libecb */ |
| 9 |
#if defined (_WIN32) && !defined (__MINGW32__) |
| 10 |
typedef signed short uint16_t; |
| 11 |
typedef signed int int32_t; |
| 12 |
typedef unsigned int uint32_t; |
| 13 |
#if __GNUC__ |
| 14 |
typedef unsigned long long uint64_t; |
| 15 |
#else /* _MSC_VER || __BORLANDC__ */ |
| 16 |
typedef unsigned __int64 uint64_t; |
| 17 |
#endif |
| 18 |
typedef unsigned long long uint64_t; |
| 19 |
#ifdef _WIN64 |
| 20 |
typedef uint64_t uintptr_t; |
| 21 |
typedef int64_t intptr_t; |
| 22 |
#else |
| 23 |
typedef uint32_t uintptr_t; |
| 24 |
typedef int32_t intptr_t; |
| 25 |
#endif |
| 26 |
#else |
| 27 |
#include <inttypes.h> |
| 28 |
#endif |
| 29 |
|
| 30 |
// portable impl |
| 31 |
#include "crc32csb8.c" |
| 32 |
|
| 33 |
static uint32_t (*crc32c) (uint32_t crc, const void *data, size_t length) = crc32cSlicingBy8; |
| 34 |
|
| 35 |
// optimized sse4.2 impl |
| 36 |
#if __GNUC__ >= 8 && (__i386__ || __x86_64__) && __SSE4_2__ /* for __builtin__crc32 */ |
| 37 |
|
| 38 |
#include <cpuid.h> |
| 39 |
#include "crc32intelc.c" |
| 40 |
|
| 41 |
static const char * |
| 42 |
detect (void) |
| 43 |
{ |
| 44 |
unsigned int eax, ebx, ecx = 0, edx; |
| 45 |
|
| 46 |
__get_cpuid (1, &eax, &ebx, &ecx, &edx); |
| 47 |
|
| 48 |
if (ecx & bit_SSE4_2) |
| 49 |
{ |
| 50 |
crc32c = crc32cIntelC; |
| 51 |
return "IntelCSSE42"; |
| 52 |
} |
| 53 |
|
| 54 |
return "SlicingBy8"; |
| 55 |
} |
| 56 |
|
| 57 |
#else |
| 58 |
|
| 59 |
static const char * |
| 60 |
detect (void) |
| 61 |
{ |
| 62 |
return "SlicingBy8"; |
| 63 |
} |
| 64 |
|
| 65 |
#endif |
| 66 |
|
| 67 |
MODULE = String::CRC32C PACKAGE = String::CRC32C |
| 68 |
|
| 69 |
BOOT: |
| 70 |
perlmulticore_support (); |
| 71 |
sv_setpv (get_sv ("String::CRC32C::IMPL", GV_ADD), detect ()); |
| 72 |
|
| 73 |
PROTOTYPES: ENABLE |
| 74 |
|
| 75 |
U32 crc32c (SV *data, U32 initvalue = 0) |
| 76 |
CODE: |
| 77 |
{ |
| 78 |
STRLEN len; |
| 79 |
const char *ptr = SvPVbyte (data, len); |
| 80 |
if (len > 65536) perlinterp_release (); |
| 81 |
RETVAL = ~crc32c (~initvalue, ptr, len); |
| 82 |
if (len > 65536) perlinterp_acquire (); |
| 83 |
} |
| 84 |
OUTPUT: RETVAL |
| 85 |
|
| 86 |
|
