INSTRUCTION DESCRIPTIONS

JSCLR

Jump to Subroutine if Bit Clear

JSCLR

Notes: If A or B is specified as the destination operand, the following sequence of events takes place:

1.The S bit is computed according to its definition (See Section A.5)

2.The accumulator value is scaled according to the scaling mode bits S0 and S1 in the status register (SR).

3.If the accumulator extension is in use, the output of the shifter is limited to the maximum positive or negative saturation constant, and the L bit is set.

4.The bit test is performed on the resulting 24-bit value, and the jump to sub- routine is taken if the bit tested is clear. The original contents of A or B are not changed.

Timing: 6+jx oscillator clock cycles

Memory: 2 program words

MOTOROLA

INSTRUCTION SET DETAILS

A - 129

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Motorola DSP56000, 24-Bit Digital Signal Processor manual Jsclr