IBM PPC440X5 Manual do Utilizador descarregar pdf (Página 352)

100

101

machhwu

Multiply Accumulate High Halfword to Word Modulo Unsigned

PPC440x5 CPU Core User’s Manual Preliminary

Page 352 of 589

instrset.fm.

September 12, 2002

machhwu

Multiply Accumulate High Halfword to Word Modulo Unsigned

prod

0:31

← (RA)

0:15

× (RB)

0:15

unsigned

temp

0:32

← prod

0:31

+ (RT)

(RT)

← temp

1:32

The high-order halfword of RA is multiplied by the high-order halfword of RB. The unsigned product is

summed with the contents of RT and RT is updated with the low-order 32 bits of the unsigned sum.

Registers Altered

•RT

• CR[CR0] if Rc contains 1

• XER[SO, OV] if OE contains 1

Architecture Note

This instruction is implementation-specific and programs which use this instruction may not be portable to

other PowerPC Book-E implementations. See Instruction Set Portability on page 250.

machhwu RT, RA, RB OE=0, Rc=0

machhwu. RT, RA, RB OE=0, Rc=1

machhwuo RT, RA, RB OE=1, Rc=0

machhwuo. RT, RA, RB OE=1, Rc=1

4RTRARBOE12Rc

0 6 11 16 21 22 31

1 2 ... 347 348 349 350 351 352 353 354 355 356 357 ... 589 590

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