IBM PPC440X5 Manual do Utilizador descarregar pdf (Página 553)

100

101

User’s Manual

Preliminary PPC440x5 CPU Core

instalfa.fm.

September 12, 2002

Page 553 of 589

subfze

RT, RA, RB

Subtract (RA) from zero with carry-in.

(RT) ←¬(RA) + XER[CA].

Place carry-out in XER[CA].

434

subfze.

CR[CR0]

subfzeo

XER[SO, OV]

subfzeo.

CR[CR0]

XER[SO, OV]

subi

RT, RA, IM

Subtract EXTS(IM) from (RA|0).

Place result in RT.

Extended mnemonic for

addi RT,RA,−IM

258

subic

RT, RA, IM

Subtract EXTS(IM) from (RA).

Place result in RT.

Place carry-out in XER[CA].

Extended mnemonic for

addic RT,RA,−IM

259

subic.

RT, RA, IM

Subtract EXTS(IM) from (RA).

Place result in RT.

Place carry-out in XER[CA].

Extended mnemonic for

addic. RT,RA,−IM

CR[CR0] 260

subis

RT, RA, IM

Subtract (IM ||

0) from (RA|0).

Place result in RT.

Extended mnemonic for

addis RT,RA,−IM

261

tlbre

RT, RA,WS

tlbentry ← TLB[(RA)

26:31

]

if WS = 0

(RT)

0:27

← tlbentry[EPN,V,TS,SIZE]

(RT)

28:31

←

MMUCR[STID] ← tlbentry[TID]

else if WS = 1

(RT)

0:21

← tlbentry[RPN]

(RT)

22:27

←

(RT)

28:31

← tlbentry[ERPN]

else if WS = 2

(RT)

0:15

←

(RT)

16:24

← tlbentry[U0,U1,U2,U3,W,I,M,G,E]

(RT)

← 0

(RT)

26:31

← tlbentry[UX,UW,UR,SX,SW,SR]

else (RT), MMUCR[STID] ← undefined

435

tlbsx

RT,RA,RB

Search the TLB for a valid entry that translates the EA.

EA = (RA|0) + (RB)

if Rc = 1

CR[CR0]

← 0

CR[CR0]

← 0

CR[CR0]

← XER[SO}

if Valid TLB entry matching EA and MMUCR[STID,STS] is in

the TLB then

(RT) ← Index of matching TLB Entry

if Rc = 1

CR[CR0]

← 1

else

(RT) ← Undefined

if Rc = 1

CR[CR0]

← 0

437

tlbsx.

CR[CR0]

Table A-1. PPC440x5 Instruction Syntax Summary (continued)

Mnemonic Operands Function

Other Registers

Changed

Page

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