IBM PPC440X5 Manual de usuario descargar pdf (Pagina 408)

100

101

srw

Shift Right Word

PPC440x5 CPU Core User’s Manual Preliminary

Page 408 of 589

instrset.fm.

September 12, 2002

srw

Shift Right Word

n ← (RB)

26:31

r ← ROTL((RS), 32 – n)

if n < 32 then

← MASK(n, 31)

else

←

(RA)

← r ∧ m

The contents of register RS are shifted right by the number of bits specified the contents of register RB

26:31

Bits shifted right out of the least significant bit are lost, and 0-bits fill the vacated bit positions on the left. The

result is placed into register RA.

Note that if RB

= 1, then the shift amount is 32 bits or more, and thus all bits are shifted out such that

Registers Altered

•RA

• CR[CR0] if Rc contains 1

srw RA, RS, RB Rc=0

srw. RA, RS, RB Rc=1

31 RS RA RB 536 Rc

0 6 11 16 21 31

1 2 ... 403 404 405 406 407 408 409 410 411 412 413 ... 589 590

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IBM PPC440X5 Manual de usuario Pagina 408

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