Excalibur electronic A-MNL-NIOSPROG-01.1 用户手册
Altera Corporation
39
32323232
32-Bit Instruction Set
2
3
2
-B
it In
st
st
ru
ctio
n
n
Se
t
t
ASR
Arithmetic Shift Right
Operation:
RA
← (RA >> RB[4..0]), fill from left with RA[31]
Assembler Syntax:
ASR %rA,%rB
Example:
ASR %L3,%g0 ; shift %L3 right by %g0 bits
Description:
Arithmetically shift right the value in RA by the value of RB; store the result in RA.
Bits 31..5 of RB are ignored. If the value in RB[4..0] is 31, RA will be zero or
negative one depending on the original sign of RA.
negative one depending on the original sign of RA.
Condition Codes:
Flags: Unaffected
Instruction Format:
RR
Instruction Fields:
A = Register index of RA operand
B = Register index of RB operand
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
0
1
0
1
0
B
A
N
V
Z
C
−
−
−
−