Stereo System User Manual

A - 310 DSP96002 USER’S MANUAL MOTOROLA
TST Test an Operand TST
Instruction Fields:
(u u)
Sddd
Dn.L n n n where nnn = 0-7
Timing: 2 + mv oscillator clock cycles
Memory: 1 + mv program words
Operation:
S - 0 (parallel data bus move)
Assembler Syntax:
TST S
(move syntax - see the Move instruction
description.)
Description:
Compare the low portion of the specified operand with zero. No result is stored, however the condition
codes are affected.
Input Operand(s) Precision: 32-bit integer.
Output Operand Precision: n.a.
CCR Condition Codes:
C - Not affected.
V - Always cleared.
Z - Set if result is zero. Cleared otherwise.
N - Set if result is negative. Cleared otherwise.
I - Not affected.
LR - Not affected.
–
R - Not affected.
A - Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: TST S (move syntax - see the Move instruction description.)
10 0110 uu01 1ddd
31 14 13 0
OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA
DATA BUS MOVE FIELD