diff options
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/crc32.C | 67 | ||||
| -rw-r--r-- | src/lib/makefile | 2 |
2 files changed, 68 insertions, 1 deletions
diff --git a/src/lib/crc32.C b/src/lib/crc32.C new file mode 100644 index 000000000..0c06c62c5 --- /dev/null +++ b/src/lib/crc32.C @@ -0,0 +1,67 @@ +/* IBM_PROLOG_BEGIN_TAG */ +/* This is an automatically generated prolog. */ +/* */ +/* $Source: src/lib/crc32.C $ */ +/* */ +/* IBM CONFIDENTIAL */ +/* */ +/* COPYRIGHT International Business Machines Corp. 2013 */ +/* */ +/* p1 */ +/* */ +/* Object Code Only (OCO) source materials */ +/* Licensed Internal Code Source Materials */ +/* IBM HostBoot Licensed Internal Code */ +/* */ +/* The source code for this program is not published or otherwise */ +/* divested of its trade secrets, irrespective of what has been */ +/* deposited with the U.S. Copyright Office. */ +/* */ +/* Origin: 30 */ +/* */ +/* IBM_PROLOG_END_TAG */ +#include <stdint.h> +#include <util/crc32.H> + +namespace Util +{ + static const uint64_t CRC32_POLY = 0x104C11DB7ull; + + uint32_t crc32_calc(const void* ptr, size_t size) + { + const uint8_t* _ptr = (const uint8_t*)ptr; + uint64_t crc = 0; + while(size) + { + uint64_t data = 0; + for (int i = 0; i < 4; ++i) + { + data <<= 8; + if (size) + { + data |= *(_ptr++); + --size; + } + } + + crc <<= 32; + crc ^= (data << 32); + + + int idx = 0; + do + { + idx = __builtin_clzl(crc); + if (idx < 32) + { + crc ^= (CRC32_POLY << (31 - idx)); + } + + } while (idx < 32); + } + + return crc; + } + +}; + diff --git a/src/lib/makefile b/src/lib/makefile index e8b648c6c..42571c341 100644 --- a/src/lib/makefile +++ b/src/lib/makefile @@ -25,7 +25,7 @@ ROOTPATH = ../.. OBJS = string.o string_ext.o stdlib.o ctype.o assert.o stdio.o math.o sprintf.o OBJS += syscall_stub.o syscall_task.o syscall_msg.o OBJS += syscall_mmio.o syscall_time.o sync.o syscall_misc.o -OBJS += syscall_mm.o splaytree.o cxxtest_data.o +OBJS += syscall_mm.o splaytree.o cxxtest_data.o crc32.o ifdef HOSTBOOT_MEMORY_LEAKS COMMONFLAGS += -DHOSTBOOT_MEMORY_LEAKS=1 |
