IBM PPC440X5 Manual do Utilizador descarregar pdf (Página 356)

100

101

maclhwu

Multiply Accumulate Low Halfword to Word Modulo Unsigned

PPC440x5 CPU Core User’s Manual Preliminary

Page 356 of 589

instrset.fm.

September 12, 2002

maclhwu

Multiply Accumulate Low Halfword to Word Modulo Unsigned

prod

0:31

← (RA)

16:31

× (RB)

16:31

unsigned

temp

0:32

← prod

0:31

+ (RT)

(RT)

← temp

1:32

The low-order halfword of RA is multiplied by the low-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.

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

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

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

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

4 RT RA RB OE 396 Rc

0 6 11 16 21 22 31

1 2 ... 351 352 353 354 355 356 357 358 359 360 361 ... 589 590

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