X-Hacker.org- TMS320C2x DSP - syntax [<label>] ork <constant> [,<shift>]

Click above to get retro games delivered to your door ever month! X-Hacker.org- TMS320C2x DSP - syntax [<label>] ork <constant> [,<shift>]

[<<Previous Entry] [^^Up^^] [Next Entry>>] [Menu] [About The Guide]

SYNTAX      [<LABEL>] ORK <constant> [,<shift>]

OPERANDS    16-bit constant; 0 . shift . 15.

EXECUTION   (PC) + 2 . PC
            (ACC(30-0)).OR.[constant * 2 ^ shift] . ACC(30-0)
            (ACC(31)) . ACC(31)
            Not affected by SXM.

DESCRIPTION The left-shifted 16-bit immediate constant is OR'ed with the
            accumulator. The result is left in the accumulator. Low-order
            bits below and high-order bits above the shifted value are
            treated as zeroes. The corresponding bits of the accumulator
            are unaffected. Note that the most-significant bit of the
            accumulator is not affected, regardless of the shift code
            value.

WORDS       2

ENCODING    15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
            +-----------------------------------------------+
            |1  1  0  1|   shift   | 0  0  0  0  0  1  0  1 |
            |-----------------------------------------------|
            |                 16-bit constant               |
            +-----------------------------------------------+

CYCLES

            +------------------------------------------------+
            |    Cycle Timings for a Single Instruction      |
            |------------------------------------------------|
            | PI/DI | PI/DE | PE/DI | PE/DE  | PR/DI | PR/DE |
            |-------+-------+-------+--------+-------+-------|
      '20   |   2   |   2   | 2+2p  |  2+2p  |   -   |   -   |
            |-------+-------+-------+--------+-------+-------|
     'C25   |   2   |   2   | 2+2p  |  2+2p  |   2   |   2   |
            |------------------------------------------------|
            |    Cycle Timings for a Repeat Instruction      |
            |------------------------------------------------|
      '20   |          not repeatable        |   -   |   -   |
            |------------------------------------------------|
     'C25   |                 not repeatable                 |
            +------------------------------------------------+



EXAMPLE     ORK   >FFFF,8

                     BEFORE             AFTER

            ACC X >12345678   ACC X >12FFFF78
                C                 C

Online resources provided by: http://www.X-Hacker.org --- NG 2 HTML conversion by Dave Pearson