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slw
Shift Left Word
Preliminary PPC440x5 CPU Core User’s Manual
instrset.fm.
September 12, 2002 Page 405 of 589
slw
Shift Left Word
n ← (RB)
26:31
r ← ROTL((RS), n)
if n < 32 then
m
← MASK(0, 31 – n)
else
m
←
32
0
(RA)
← r ∧ m
The contents of register RS are shifted left by the number of bits specified by the contents of register RB
26:31
.
Bits shifted left out of the most significant bit are lost, and 0-bits fill vacated bit positions on the right. The
result is placed into register RA.
Note that if RB
26
= 1, then the shift amount is 32 bits or more, and thus all bits are shifted out such that
register RA is set to zero.
Registers Altered
•RA
• CR[CR0] if Rc contains 1
slw RA, RS, RB Rc=0
slw. RA, RS, RB Rc=1
31 RS RA RB 24 Rc
0 6 11 16 21 31