projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /* |
| 2 | * Ceph - scalable distributed file system | |
| 3 | * | |
| 4 | * Copyright (C) 2014 CERN (Switzerland) | |
| 5 | * \ | |
| 6 | * Author: Andreas-Joachim Peters <Andreas.Joachim.Peters@cern.ch> \ | |
| 7 | * | |
| 8 | * This library is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU Lesser General Public | |
| 10 | * License as published by the Free Software Foundation; either | |
| 11 | * version 2.1 of the License, or (at your option) any later version. | |
| 12 | * | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef EC_ISA_XOR_OP_H | |
| 16 | #define EC_ISA_XOR_OP_H | |
| 17 | ||
| 18 | // ----------------------------------------------------------------------------- | |
| 19 | #include <assert.h> | |
| 20 | #include <stdint.h> | |
| 7c673cae FG |
21 | // ----------------------------------------------------------------------------- |
| 22 | ||
| 23 | // ------------------------------------------------------------------------- | |
| 24 | // declaration of 64/128-bit vector operations depending on availability | |
| 25 | // ------------------------------------------------------------------------- | |
| 26 | // ------------------------------------------------------------------------- | |
| 27 | ||
| 28 | #define EC_ISA_ADDRESS_ALIGNMENT 32u | |
| 29 | #define EC_ISA_VECTOR_SSE2_WORDSIZE 64u | |
| 30 | ||
| 31 | #if __GNUC__ > 4 || \ | |
| 32 | ( (__GNUC__ == 4) && (__GNUC_MINOR__ >= 4) ) ||\ | |
| 33 | (__clang__ == 1 ) | |
| 34 | #ifdef EC_ISA_VECTOR_OP_DEBUG | |
| 35 | #pragma message "* using 128-bit vector operations in " __FILE__ | |
| 36 | #endif | |
| 37 | ||
| 38 | // ------------------------------------------------------------------------- | |
| 39 | // use 128-bit pointer | |
| 40 | // ------------------------------------------------------------------------- | |
| 41 | typedef long vector_op_t __attribute__((vector_size(16))); | |
| 42 | #define EC_ISA_VECTOR_OP_WORDSIZE 16 | |
| 43 | #else | |
| 44 | // ------------------------------------------------------------------------- | |
| 45 | // use 64-bit pointer | |
| 46 | // ------------------------------------------------------------------------- | |
| 47 | typedef unsigned long long vector_op_t; | |
| 48 | #define EC_ISA_VECTOR_OP_WORDSIZE 8 | |
| 49 | #endif | |
| 50 | ||
| 51 | ||
| 52 | // ------------------------------------------------------------------------- | |
| 53 | // check if a pointer is aligend to byte_count | |
| 54 | // ------------------------------------------------------------------------- | |
| 55 | #define is_aligned(POINTER, BYTE_COUNT) \ | |
| 56 | (((uintptr_t)(const void *)(POINTER)) % (BYTE_COUNT) == 0) | |
| 57 | ||
| 58 | // ------------------------------------------------------------------------- | |
| 59 | // compute byte-wise XOR of cw and dw block, ew contains the end address of cw | |
| 60 | // ------------------------------------------------------------------------- | |
| 61 | void | |
| 62 | byte_xor(unsigned char* cw, unsigned char* dw, unsigned char* ew); | |
| 63 | ||
| 64 | // ------------------------------------------------------------------------- | |
| 65 | // compute word-wise XOR of cw and dw block, ew contains the end address of cw | |
| 66 | // ------------------------------------------------------------------------- | |
| 67 | void | |
| 68 | vector_xor(vector_op_t* cw, vector_op_t* dw, vector_op_t* ew); | |
| 69 | ||
| 70 | // ------------------------------------------------------------------------- | |
| 71 | // compute region XOR like parity = src[0] ^ src[1] ... ^ src[src_size-] | |
| 72 | // ------------------------------------------------------------------------- | |
| 73 | void | |
| 74 | region_xor(unsigned char** src, unsigned char* parity, int src_size, unsigned size); | |
| 75 | ||
| 76 | // ------------------------------------------------------------------------- | |
| 77 | // compute region XOR like parity = src[0] ^ src[1] ... ^ src[src_size-] | |
| 78 | // using SSE2 64-byte operations | |
| 79 | // ------------------------------------------------------------------------- | |
| 80 | void | |
| 81 | region_sse2_xor(char** src /* array of 64-byte aligned source pointer to xor */, | |
| 82 | char* parity /* 64-byte aligned output pointer containing the parity */, | |
| 83 | int src_size /* size of the source pointer array */, | |
| 84 | unsigned size /* size of the region to xor */); | |
| 85 | ||
| 86 | ||
| 87 | #endif // EC_ISA_XOR_OP_H |