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103 lines
5.0 KiB
C
103 lines
5.0 KiB
C
/** @file Set of macros for accessing host memory units of various sizes
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and endianness.
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*/
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#ifndef MEM_ACCESS_H
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#define MEM_ACCESS_H
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#include "endianswap.h"
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#include <cinttypes>
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/* read an aligned big-endian WORD (16bit) */
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#define READ_WORD_BE_A(addr) (BYTESWAP_16(*((uint16_t*)((addr)))))
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/* read an aligned big-endian DWORD (32bit) */
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#define READ_DWORD_BE_A(addr) (BYTESWAP_32(*((uint32_t*)((addr)))))
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/* read an aligned big-endian QWORD (64bit) */
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#define READ_QWORD_BE_A(addr) (BYTESWAP_64(*((uint64_t*)((addr)))))
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/* read an aligned little-endian WORD (16bit) */
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#define READ_WORD_LE_A(addr) (*(uint16_t*)((addr)))
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/* read an aligned little-endian DWORD (32bit) */
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#define READ_DWORD_LE_A(addr) (*(uint32_t*)((addr)))
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/* read an aligned little-endian QWORD (64bit) */
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#define READ_QWORD_LE_A(addr) (*(uint64_t*)((addr)))
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/* read an unaligned big-endian WORD (16bit) */
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#define READ_WORD_BE_U(addr) (((addr)[0] << 8) | (addr)[1])
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/* read an unaligned big-endian DWORD (32bit) */
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#define READ_DWORD_BE_U(addr) (((addr)[0] << 24) | ((addr)[1] << 16) | ((addr)[2] << 8) | (addr)[3])
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/* read an unaligned big-endian QWORD (32bit) */
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#define READ_QWORD_BE_U(addr) \
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(((addr)[0] << 56) | ((addr)[1] << 48) | ((addr)[2] << 40) | ((addr)[3] << 32) | \
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((addr)[4] << 24) | ((addr)[5] << 16) | ((addr)[6] << 8) | (addr)[7])
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/* read an unaligned little-endian WORD (16bit) */
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#define READ_WORD_LE_U(addr) (((addr)[1] << 8) | (addr)[0])
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/* read an unaligned little-endian DWORD (32bit) */
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#define READ_DWORD_LE_U(addr) (((addr)[3] << 24) | ((addr)[2] << 16) | ((addr)[1] << 8) | (addr)[0])
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/* read an unaligned little-endian DWORD (32bit) */
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#define READ_QWORD_LE_U(addr) \
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(((addr)[7] << 56) | ((addr)[6] << 48) | ((addr)[5] << 40) | ((addr)[4] << 32) | \
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((addr)[3] << 24) | ((addr)[2] << 16) | ((addr)[1] << 8) | (addr)[0])
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/* write an aligned big-endian WORD (16bit) */
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#define WRITE_WORD_BE_A(addr, val) (*((uint16_t*)((addr))) = BYTESWAP_16(val))
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/* write an aligned big-endian DWORD (32bit) */
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#define WRITE_DWORD_BE_A(addr, val) (*((uint32_t*)((addr))) = BYTESWAP_32(val))
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/* write an aligned big-endian QWORD (64bit) */
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#define WRITE_QWORD_BE_A(addr, val) (*((uint64_t*)((addr))) = BYTESWAP_64(val))
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/* write an unaligned big-endian WORD (16bit) */
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#define WRITE_WORD_BE_U(addr, val) \
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do { \
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(addr)[0] = ((val) >> 8) & 0xFF; \
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(addr)[1] = (val)&0xFF; \
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} while (0)
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/* write an unaligned big-endian DWORD (32bit) */
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#define WRITE_DWORD_BE_U(addr, val) \
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do { \
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(addr)[0] = ((val) >> 24) & 0xFF; \
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(addr)[1] = ((val) >> 16) & 0xFF; \
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(addr)[2] = ((val) >> 8) & 0xFF; \
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(addr)[3] = (val)&0xFF; \
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} while (0)
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/* write an aligned little-endian WORD (16bit) */
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#define WRITE_WORD_LE_A(addr, val) (*((uint16_t*)((addr))) = (val))
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/* write an aligned little-endian DWORD (32bit) */
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#define WRITE_DWORD_LE_A(addr, val) (*((uint32_t*)((addr))) = (val))
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/* write an aligned little-endian QWORD (64bit) */
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#define WRITE_QWORD_LE_A(addr, val) (*((uint64_t*)((addr))) = (val))
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/* write an unaligned little-endian WORD (16bit) */
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#define WRITE_WORD_LE_U(addr, val) \
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do { \
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(addr)[0] = (val)&0xFF; \
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(addr)[1] = ((val) >> 8) & 0xFF; \
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} while (0)
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/* write an unaligned little-endian DWORD (32bit) */
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#define WRITE_DWORD_LE_U(addr, val) \
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do { \
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(addr)[0] = (val)&0xFF; \
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(addr)[1] = ((val) >> 8) & 0xFF; \
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(addr)[2] = ((val) >> 16) & 0xFF; \
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(addr)[3] = ((val) >> 24) & 0xFF; \
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} while (0)
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#endif /* MEM_ACCESS_H */
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