Texas Instruments TMS320C2XX - Manual (Page 298)

Rotate Accumulator Right ROR
7-145 Assembly Language Instructions
Syntax ROR
Operands None
Opcode 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1 0 1 1 0 0 0 0 0 1 1 1 1 1 0 1
Execution Increment PC, then ...
C
→
ACC(31)
(ACC(0))
→
C
(ACC(31:1))
→
ACC(30:0)
Status Bits Affects
C
This instruction is not affected by SXM.
Description The ROR instruction rotates the accumulator right one bit. The value of the
carry bit is shifted into the MSB of the accumulator, then the LSB of the accu-
mulator is shifted into the carry bit.
Words 1
Cycles for a Single ROR Instruction
ROM DARAM SARAM External
1 1 1 1+p
Cycles for a Repeat (RPT) Execution of an ROR Instruction
ROM DARAM SARAM External
n n n n+p
Example ROR
Before Instruction After Instruction
ACC 0 B0001235h ACC 1 5800091Ah
C C
Cycles