Stereo System User Manual

MOTOROLA DSP96002 USER’S MANUAL A - 305
SUB Subtract SUB
Instruction Fields:
(u u)
Dddd
Dn.L n n n where nnn = 0-7
Ssss
Dn.L n n n where nnn = 0-7
Timing: 2 + mv oscillator clock cycles
Memory: 1 + mv program words
Operation:
D.L - S.L → D.L (parallel data bus move)
Assembler Syntax:
SUB S,D
(move syntax - see the Move instruction de-
scription.)
Description:
Subtract the low portion of the specified source operand S from the low portion of the destination operand
D and store the result in the low portion of D.
Input Operand(s) Precision: 32-bit integer.
Output Operand Precision: 32-bit integer.
CCR Condition Codes:
C - Set if a borrow is generated from the MSB of the result. Cleared otherwise.
V - Set if result overflows. Cleared otherwise.
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: SUB S,D (move syntax - see the Move instruction description.)
00 1sss uu00 1ddd
31 14 13 0
OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA
DATA BUS MOVE FIELD