IBM PPC440X5 Manual de usuario descargar pdf (Pagina 325)

Load Halfword Algebraic

Preliminary PPC440x5 CPU Core User’s Manual

instrset.fm.

September 12, 2002 Page 325 of 589

Load Halfword Algebraic

EA ← (RA|0) + EXTS(D)

← 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 if the RA field is 0 and is the

contents of register RA otherwise.

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

Registers Altered

lha RT, D(RA)

0 6 11 16 31

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IBM PPC440X5 Manual de usuario Pagina 325