| 1 | #ifndef PERL_SEEN_HV_MACRO_H /* compile once */ |
| 2 | #define PERL_SEEN_HV_MACRO_H |
| 3 | |
| 4 | #if IVSIZE == 8 |
| 5 | #define CAN64BITHASH |
| 6 | #endif |
| 7 | |
| 8 | #ifdef CAN64BITHASH |
| 9 | #ifndef U64TYPE |
| 10 | /* This probably isn't going to work, but failing with a compiler error due to |
| 11 | lack of uint64_t is no worse than failing right now with an #error. */ |
| 12 | #define U64 uint64_t |
| 13 | #endif |
| 14 | #endif |
| 15 | |
| 16 | |
| 17 | /*----------------------------------------------------------------------------- |
| 18 | * Endianess and util macros |
| 19 | * |
| 20 | * The following 3 macros are defined in this section. The other macros defined |
| 21 | * are only needed to help derive these 3. |
| 22 | * |
| 23 | * U8TO16_LE(x) Read a little endian unsigned 32-bit int |
| 24 | * U8TO32_LE(x) Read a little endian unsigned 32-bit int |
| 25 | * U8TO28_LE(x) Read a little endian unsigned 32-bit int |
| 26 | * ROTL32(x,r) Rotate x left by r bits |
| 27 | * ROTL64(x,r) Rotate x left by r bits |
| 28 | * ROTR32(x,r) Rotate x right by r bits |
| 29 | * ROTR64(x,r) Rotate x right by r bits |
| 30 | */ |
| 31 | |
| 32 | #ifndef U8TO16_LE |
| 33 | #define _shifted_octet(type,ptr,idx,shift) (((type)(((U8*)(ptr))[(idx)]))<<(shift)) |
| 34 | #if (BYTEORDER == 0x1234 || BYTEORDER == 0x12345678) |
| 35 | #ifdef USE_UNALIGNED_PTR_DEREF |
| 36 | #define U8TO16_LE(ptr) (*((const U16*)(ptr))) |
| 37 | #define U8TO32_LE(ptr) (*((const U32*)(ptr))) |
| 38 | #define U8TO64_LE(ptr) (*((const U64*)(ptr))) |
| 39 | #else |
| 40 | #define U8TO16_LE(ptr) (_shifted_octet(U16,(ptr),0, 0)|\ |
| 41 | _shifted_octet(U16,(ptr),1, 8)) |
| 42 | |
| 43 | #define U8TO32_LE(ptr) (_shifted_octet(U32,(ptr),0, 0)|\ |
| 44 | _shifted_octet(U32,(ptr),1, 8)|\ |
| 45 | _shifted_octet(U32,(ptr),2,16)|\ |
| 46 | _shifted_octet(U32,(ptr),3,24)) |
| 47 | |
| 48 | #define U8TO64_LE(ptr) (_shifted_octet(U64,(ptr),0, 0)|\ |
| 49 | _shifted_octet(U64,(ptr),1, 8)|\ |
| 50 | _shifted_octet(U64,(ptr),2,16)|\ |
| 51 | _shifted_octet(U64,(ptr),3,24)|\ |
| 52 | _shifted_octet(U64,(ptr),4,32)|\ |
| 53 | _shifted_octet(U64,(ptr),5,40)|\ |
| 54 | _shifted_octet(U64,(ptr),6,48)|\ |
| 55 | _shifted_octet(U64,(ptr),7,56)) |
| 56 | #endif |
| 57 | #elif (BYTEORDER == 0x4321 || BYTEORDER == 0x87654321) |
| 58 | #define U8TO16_LE(ptr) (_shifted_octet(U16,(ptr),1, 0)|\ |
| 59 | _shifted_octet(U16,(ptr),0, 8)) |
| 60 | |
| 61 | #define U8TO32_LE(ptr) (_shifted_octet(U32,(ptr),3, 0)|\ |
| 62 | _shifted_octet(U32,(ptr),2, 8)|\ |
| 63 | _shifted_octet(U32,(ptr),1,16)|\ |
| 64 | _shifted_octet(U32,(ptr),0,24)) |
| 65 | |
| 66 | #define U8TO64_LE(ptr) (_shifted_octet(U64,(ptr),7, 0)|\ |
| 67 | _shifted_octet(U64,(ptr),6, 8)|\ |
| 68 | _shifted_octet(U64,(ptr),5,16)|\ |
| 69 | _shifted_octet(U64,(ptr),4,24)|\ |
| 70 | _shifted_octet(U64,(ptr),3,32)|\ |
| 71 | _shifted_octet(U64,(ptr),2,40)|\ |
| 72 | _shifted_octet(U64,(ptr),1,48)|\ |
| 73 | _shifted_octet(U64,(ptr),0,56)) |
| 74 | #endif |
| 75 | #endif |
| 76 | |
| 77 | /* Find best way to ROTL32/ROTL64 */ |
| 78 | #if defined(_MSC_VER) |
| 79 | #include <stdlib.h> /* Microsoft put _rotl declaration in here */ |
| 80 | #define ROTL32(x,r) _rotl(x,r) |
| 81 | #define ROTR32(x,r) _rotr(x,r) |
| 82 | #define ROTL64(x,r) _rotl64(x,r) |
| 83 | #define ROTR64(x,r) _rotr64(x,r) |
| 84 | #else |
| 85 | /* gcc recognises this code and generates a rotate instruction for CPUs with one */ |
| 86 | #define ROTL32(x,r) (((U32)(x) << (r)) | ((U32)(x) >> (32 - (r)))) |
| 87 | #define ROTR32(x,r) (((U32)(x) << (32 - (r))) | ((U32)(x) >> (r))) |
| 88 | #define ROTL64(x,r) ( ( (U64)(x) << (r) ) | ( (U64)(x) >> ( 64 - (r) ) ) ) |
| 89 | #define ROTR64(x,r) ( ( (U64)(x) << ( 64 - (r) ) ) | ( (U64)(x) >> (r) ) ) |
| 90 | #endif |
| 91 | |
| 92 | |
| 93 | #ifdef UV_IS_QUAD |
| 94 | #define ROTL_UV(x,r) ROTL64(x,r) |
| 95 | #define ROTR_UV(x,r) ROTL64(x,r) |
| 96 | #else |
| 97 | #define ROTL_UV(x,r) ROTL32(x,r) |
| 98 | #define ROTR_UV(x,r) ROTR32(x,r) |
| 99 | #endif |
| 100 | #if IVSIZE == 8 |
| 101 | #define CAN64BITHASH |
| 102 | #endif |
| 103 | |
| 104 | #endif |