Tst test an operand tst – Motorola DSP96002 User Manual
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DSP96002 USER’S MANUAL
MOTOROLA
TST
Test an Operand
TST
Instruction Fields:
(u u)
S
d d d
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