?? lib_mem.h
字號:
*
* Description : Encode data values to any CPU memory address.
*
* Argument(s) : addr Lowest CPU memory address to encode data value (see Notes #2 & #3a).
*
* val Data value to encode (see Notes #1 & #3b).
*
* Return(s) : none.
*
* Caller(s) : various.
*
* Note(s) : (1) Encode data values into CPU memory based on the values' data-word order :
*
* MEM_VAL_SET_xxx_BIG() Encode big- endian data values -- data words' most
* significant octet @ lowest memory address
* MEM_VAL_SET_xxx_LITTLE() Encode little-endian data values -- data words' least
* significant octet @ lowest memory address
* MEM_VAL_SET_xxx() Encode data values using CPU's native or configured
* data-word order
*
* See also 'cpu.h CPU WORD CONFIGURATION Note #2'.
*
* (2) CPU memory addresses/pointers NOT checked for NULL.
*
* (3) (a) MEM_VAL_SET_xxx() macro's encode data values without regard to CPU word-aligned addresses.
* Thus for processors that require data word alignment, data words can be encoded to any
* CPU address, word-aligned or not, without generating data-word-alignment exceptions/faults.
*
* (b) However, 'val' data value to encode MUST start on an appropriate CPU word-aligned address.
*
* See also 'MEMORY DATA VALUE MACRO'S Note #1'.
*
* (4) MEM_VAL_COPY_SET_xxx() macro's are more efficient than MEM_VAL_SET_xxx() macro's & are
* also independent of CPU data-word-alignment & SHOULD be used whenever possible.
*
* See also 'MEM_VAL_COPY_SET_xxx() Note #4'.
*
* (5) The 'CPU_CFG_ENDIAN_TYPE' pre-processor 'else'-conditional code SHOULD never be compiled/
* linked since each 'cpu.h' SHOULD ensure that the CPU data-word-memory order configuration
* constant (CPU_CFG_ENDIAN_TYPE) is configured with an appropriate data-word-memory order
* value (see 'cpu.h CPU WORD CONFIGURATION Note #2'). The 'else'-conditional code is
* included as an extra precaution in case 'cpu.h' is incorrectly configured.
*********************************************************************************************************
*/
#define MEM_VAL_SET_INT08U_BIG(addr, val) { (*(((CPU_INT08U *)(addr)) + 0)) = ((CPU_INT08U)((((CPU_INT08U)(val)) & 0xFF) >> (0 * DEF_OCTET_NBR_BITS))); }
#define MEM_VAL_SET_INT16U_BIG(addr, val) { (*(((CPU_INT08U *)(addr)) + 0)) = ((CPU_INT08U)((((CPU_INT16U)(val)) & 0xFF00) >> (1 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 1)) = ((CPU_INT08U)((((CPU_INT16U)(val)) & 0x00FF) >> (0 * DEF_OCTET_NBR_BITS))); }
#define MEM_VAL_SET_INT32U_BIG(addr, val) { (*(((CPU_INT08U *)(addr)) + 0)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0xFF000000) >> (3 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 1)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0x00FF0000) >> (2 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 2)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0x0000FF00) >> (1 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 3)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0x000000FF) >> (0 * DEF_OCTET_NBR_BITS))); }
#define MEM_VAL_SET_INT08U_LITTLE(addr, val) { (*(((CPU_INT08U *)(addr)) + 0)) = ((CPU_INT08U)((((CPU_INT08U)(val)) & 0xFF) >> (0 * DEF_OCTET_NBR_BITS))); }
#define MEM_VAL_SET_INT16U_LITTLE(addr, val) { (*(((CPU_INT08U *)(addr)) + 0)) = ((CPU_INT08U)((((CPU_INT16U)(val)) & 0x00FF) >> (0 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 1)) = ((CPU_INT08U)((((CPU_INT16U)(val)) & 0xFF00) >> (1 * DEF_OCTET_NBR_BITS))); }
#define MEM_VAL_SET_INT32U_LITTLE(addr, val) { (*(((CPU_INT08U *)(addr)) + 0)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0x000000FF) >> (0 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 1)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0x0000FF00) >> (1 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 2)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0x00FF0000) >> (2 * DEF_OCTET_NBR_BITS))); \
(*(((CPU_INT08U *)(addr)) + 3)) = ((CPU_INT08U)((((CPU_INT32U)(val)) & 0xFF000000) >> (3 * DEF_OCTET_NBR_BITS))); }
#if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG)
#define MEM_VAL_SET_INT08U(addr, val) MEM_VAL_SET_INT08U_BIG(addr, val)
#define MEM_VAL_SET_INT16U(addr, val) MEM_VAL_SET_INT16U_BIG(addr, val)
#define MEM_VAL_SET_INT32U(addr, val) MEM_VAL_SET_INT32U_BIG(addr, val)
#elif (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_LITTLE)
#define MEM_VAL_SET_INT08U(addr, val) MEM_VAL_SET_INT08U_LITTLE(addr, val)
#define MEM_VAL_SET_INT16U(addr, val) MEM_VAL_SET_INT16U_LITTLE(addr, val)
#define MEM_VAL_SET_INT32U(addr, val) MEM_VAL_SET_INT32U_LITTLE(addr, val)
#else /* See Note #5. */
#error "CPU_CFG_ENDIAN_TYPE illegally #defined in 'cpu.h' "
#error " [See 'cpu.h CONFIGURATION ERRORS']"
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* MEM_VAL_COPY_GET_xxx()
*
* Description : Copy & decode data values from any CPU memory address to any CPU memory address.
*
* Argument(s) : addr_dest Lowest CPU memory address to copy/decode source address's data value
* (see Notes #2 & #3).
*
* addr_src Lowest CPU memory address of data value to copy/decode
* (see Notes #2 & #3).
*
* Return(s) : none.
*
* Caller(s) : various.
*
* Note(s) : (1) Copy/decode data values based on the values' data-word order :
*
* MEM_VAL_COPY_GET_xxx_BIG() Decode big- endian data values -- data words' most
* significant octet @ lowest memory address
* MEM_VAL_COPY_GET_xxx_LITTLE() Decode little-endian data values -- data words' least
* significant octet @ lowest memory address
* MEM_VAL_COPY_GET_xxx() Decode data values using CPU's native or configured
* data-word order
*
* See also 'cpu.h CPU WORD CONFIGURATION Note #2'.
*
* (2) CPU memory addresses/pointers NOT checked for NULL.
*
* (3) MEM_VAL_COPY_GET_xxx() macro's copy/decode data values without regard to CPU word-aligned
* addresses. Thus for processors that require data word alignment, data words can be copied/
* decoded to/from any CPU address, word-aligned or not, without generating data-word-alignment
* exceptions/faults.
*
* (4) MEM_VAL_COPY_GET_xxx() macro's are more efficient than MEM_VAL_GET_xxx() macro's & are
* also independent of CPU data-word-alignment & SHOULD be used whenever possible.
*
* See also 'MEM_VAL_GET_xxx() Note #4'.
*
* (5) Since octet-order copy/conversion are inverse operations, memory data value gets/sets are
* inverse operations.
*
* See also 'MEM_VAL_COPY_SET_xxx() Note #5'.
*
* (6) The 'CPU_CFG_ENDIAN_TYPE' pre-processor 'else'-conditional code SHOULD never be compiled/
* linked since each 'cpu.h' SHOULD ensure that the CPU data-word-memory order configuration
* constant (CPU_CFG_ENDIAN_TYPE) is configured with an appropriate data-word-memory order
* value (see 'cpu.h CPU WORD CONFIGURATION Note #2'). The 'else'-conditional code is
* included as an extra precaution in case 'cpu.h' is incorrectly configured.
*********************************************************************************************************
*/
/*$PAGE*/
#if (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_BIG)
#define MEM_VAL_COPY_GET_INT08U_BIG(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT16U_BIG(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 1)); }
#define MEM_VAL_COPY_GET_INT32U_BIG(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 1)); \
(*(((CPU_INT08U *)(addr_dest)) + 2)) = (*(((CPU_INT08U *)(addr_src)) + 2)); \
(*(((CPU_INT08U *)(addr_dest)) + 3)) = (*(((CPU_INT08U *)(addr_src)) + 3)); }
#define MEM_VAL_COPY_GET_INT08U_LITTLE(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT16U_LITTLE(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 1)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT32U_LITTLE(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 3)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 2)); \
(*(((CPU_INT08U *)(addr_dest)) + 2)) = (*(((CPU_INT08U *)(addr_src)) + 1)); \
(*(((CPU_INT08U *)(addr_dest)) + 3)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT08U(addr_dest, addr_src) MEM_VAL_COPY_GET_INT08U_BIG(addr_dest, addr_src)
#define MEM_VAL_COPY_GET_INT16U(addr_dest, addr_src) MEM_VAL_COPY_GET_INT16U_BIG(addr_dest, addr_src)
#define MEM_VAL_COPY_GET_INT32U(addr_dest, addr_src) MEM_VAL_COPY_GET_INT32U_BIG(addr_dest, addr_src)
#elif (CPU_CFG_ENDIAN_TYPE == CPU_ENDIAN_TYPE_LITTLE)
#define MEM_VAL_COPY_GET_INT08U_BIG(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT16U_BIG(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 1)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT32U_BIG(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 3)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 2)); \
(*(((CPU_INT08U *)(addr_dest)) + 2)) = (*(((CPU_INT08U *)(addr_src)) + 1)); \
(*(((CPU_INT08U *)(addr_dest)) + 3)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT08U_LITTLE(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); }
#define MEM_VAL_COPY_GET_INT16U_LITTLE(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 1)); }
#define MEM_VAL_COPY_GET_INT32U_LITTLE(addr_dest, addr_src) { (*(((CPU_INT08U *)(addr_dest)) + 0)) = (*(((CPU_INT08U *)(addr_src)) + 0)); \
(*(((CPU_INT08U *)(addr_dest)) + 1)) = (*(((CPU_INT08U *)(addr_src)) + 1)); \
(*(((CPU_INT08U *)(addr_dest)) + 2)) = (*(((CPU_INT08U *)(addr_src)) + 2)); \
(*(((CPU_INT08U *)(addr_dest)) + 3)) = (*(((CPU_INT08U *)(addr_src)) + 3)); }
#define MEM_VAL_COPY_GET_INT08U(addr_dest, addr_src) MEM_VAL_COPY_GET_INT08U_LITTLE(addr_dest, addr_src)
#define MEM_VAL_COPY_GET_INT16U(addr_dest, addr_src) MEM_VAL_COPY_GET_INT16U_LITTLE(addr_dest, addr_src)
#define MEM_VAL_COPY_GET_INT32U(addr_dest, addr_src) MEM_VAL_COPY_GET_INT32U_LITTLE(addr_dest, addr_src)
#else /* See Note #6. */
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