Stereo System User Manual

A - 294 DSP96002 USER’S MANUAL MOTOROLA
ROR Rotate Right ROR
Operation:
Assembler Syntax:
ROR D ( See the MOVE instruction description.)
Description:
Rotate the low portion of the specified operand one bit to the right. The carry bit receives the previous value
of bit 0 of the operand. The previous value of the carry bit is shifted into bit 31 of the operand. The result
is stored in the low portion of D. This instruction is a 32 bit operation and is performed on bits 0-31 of D.
The remaining bits of D are not affected.
Input Operand(s) Precision: 32-bit integer.
Output Operand Precision: 32-bit integer.
CCR Condition Codes:
C - Set if the bit shifted out of the operand is set. Cleared otherwise.
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: ROR D ( See the MOVE instruction description.)
31 0
C (parallel data bus move)
Instruction Fields:
(u u)
Dddd
Dn.L n n n where nnn = 0-7
Timing: 2 + mv oscillator clock cycles
Memory: 1 + mv program words
10 0011 uu01 1ddd
31 14 13 0
OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA
DATA BUS MOVE FIELD