X-Hacker.org- TMS320C2x DSP - syntax direct [<label>] zalh <dma>

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SYNTAX      DIRECT   [<LABEL>] ZALH <dma>
            INDIRECT [<LABEL>] ZALH {ind}[,<next ARP>]

OPERANDS    0 . dma . 127; 0 . next ARP . 7.

EXECUTION   (PC) + 1 . PC
            0 . ACC(15-0)
            (dma) . ACC(31-16)

DESCRIPTION ZALH loads a data memory value into the high-order half of the
            accumulator. The low-order bits of the accumulator are zeroed.

            ZALH is useful for 32-bit arithmetic operations.

WORDS       1

ENCODING    15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
            +-----------------------------------------------+
            |0  1  0  0  0  0  0  0| 0| data memory address | DIRECT
            +-----------------------------------------------+

            15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
            +-----------------------------------------------+
            |0  1  0  0  0  0  0  0| 1| see indirect fields | INDIRECT
            +-----------------------------------------------+

CYCLES

            +------------------------------------------------+
            |    Cycle Timings for a Single Instruction      |
            |------------------------------------------------|
            | PI/DI | PI/DE | PE/DI | PE/DE  | PR/DI | PR/DE |
            |-------+-------+-------+--------+-------+-------|
      '20   |   1   |  2+d  |  1+p  | 2+d+p  |   -   |   -   |
            |-------+-------+-------+--------+-------+-------|
     'C25   |   1   |  2+d  |  1+p  | 2+d+p  |   1   |  2+d  |
            |------------------------------------------------|
            |    Cycle Timings for a Repeat Instruction      |
            |------------------------------------------------|
      '20   |   n   | 2n+nd |  n+p  | 2n+nd+p|   -   |   -   |
            |-------+-------+-------+--------+-------+-------|
     'C25   |   n   | 1+n+nd|  n+p  |1+n+nd+p|   n   |1+n+nd |
            +------------------------------------------------+



EXAMPLE     ZALH  DAT3        (DP = 32)
            or
            ZALH  *           If current auxiliary register contains 4099.

                       BEFORE                 AFTER

               dm4099   >3F01      dm4099     >3F01
                ACC X >77FFFF       ACC X >3F010000
                    C                   C

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