IBM PPC440X5 Manual do Utilizador descarregar pdf (Página 429)

100

101

subf

Subtract From

Preliminary PPC440x5 CPU Core User’s Manual

instrset.fm.

September 12, 2002 Page 429 of 589

subf

Subtract From

(RT) ←¬(RA) + (RB) + 1

The sum of the ones complement of register RA, register RB, and 1 is stored into register RT.

Registers Altered

•RT

• CR[CR0] if Rc contains 1

• XER[SO, OV] if OE contains 1

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

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

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

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

31 RT RA RB OE 40 Rc

0 6 11 16 21 22 31

Table 9-29. Extended Mnemonics for subf, subf., subfo, subfo.

Mnemonic Operands Function

Other Registers

Altered

sub

RT, RA, RB

Subtract (RB) from (RA).

(RT)

←¬(RB) + (RA) + 1.

Extended mnemonic for

subf RT,RB,RA

sub.

Extended mnemonic for

subf. RT,RB,RA

CR[CR0]

subo

Extended mnemonic for

subfo RT,RB,RA

XER[SO, OV]

subo.

Extended mnemonic for

subfo. RT,RB,RA

CR[CR0]

XER[SO, OV]

1 2 ... 424 425 426 427 428 429 430 431 432 433 434 ... 589 590

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