Rev. 1.50, 10/04, page 317 of 448
10.1.67 SHLR (Shift Logical Right): Shift Instruction
Format
Operation
Instruction Code
Cycle
T Bit
SHLR Rn
0
→
Rn
→
T
0100nnnn00000001
1 LSB
Description:
This instruction logically shifts the contents of general register Rn one bit to the
right, and stores the result in Rn. The bit shifted out of the operand is transferred to the T bit.
MSB
LSB
SHLR
T
0
Notes:
None
Operation:
SHLR(long n) /* SHLR Rn */
{
if ((R[n] & 0x00000001)==0) T = 0;
else T = 1;
R[n] >>= 1;
R[n] &= 0x7FFFFFFF;
PC += 2;
}
Example:
SHLR
R0
;
Before execution R0 = H'80000001, T = 0
;
After execution
R0 = H'40000000, T = 1
Summary of Contents for SuperH SH-4A
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