IBM PPC440X5 Manual do Utilizador descarregar pdf (Página 326)

100

101

lhau

Load Halfword Algebraic with Update

PPC440x5 CPU Core User’s Manual Preliminary

Page 326 of 589

instrset.fm.

September 12, 2002

lhau

Load Halfword Algebraic with Update

EA ← (RA|0) + EXTS(D)

(RA)

← EA

(RT)

← EXTS(MS(EA,2))

An effective address (EA) is formed by adding a displacement to a base address. The displacement is

obtained by sign-extending the 16-bit D field to 32 bits. The base address is 0 when the RA field is 0 and is

the contents of register RA otherwise. The EA is placed into register RA.

The halfword at the EA is sign-extended to 32 bits and placed into register RT.

Registers Altered

•RA

•RT

Invalid Instruction Forms

• RA=RT

• RA=0

lhau RT, D(RA)

43 RT RA D

0 6 11 16 31

1 2 ... 321 322 323 324 325 326 327 328 329 330 331 ... 589 590

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