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X-Hacker.org- TMS320C2x DSP - syntax direct [<label>] adds <dma> http://www.X-Hacker.org [<<Previous Entry] [^^Up^^] [Next Entry>>] [Menu] [About The Guide]
SYNTAX      DIRECT    [<LABEL>] ADDS <dma>
            INDIRECT  [<LABEL>] ADDS {ind}[,<next ARP>]

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

EXECUTION   (PC) + 1 . PC
            (ACC) + (dma) . ACC; (dma) is a 16-bit unsigned number
            Affects OV; affected by OVM.
            Affects C (TMS320C25).
            Not affected by SXM.

DESCRIPTION The contents of the specified data memory location are added
            with sign-extension suppressed. The data is treated as a
            16-bit unsigned number, regardless of SXM. The accumulator
            behaves as a signed number. Note that ADDS produces the same
            results as an ADD instruction with SXM = 0 and a shift count
            of 0.

WORDS       1

ENCODING    15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
            +-----------------------------------------------+
            |0  1  0  0  1  0  0  1| 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  1  0  0  1| 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     ADDS  DAT11       (DP = 6)
            or
            ADDS  *           If current auxiliary register contains 779.

                  BEFORE            AFTER

             dm779 >F006      dm779 >F006
             ACC X    >3      ACC 0 >F009
                 C                C

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