Справочник Пользователя для IBM powerpc 750gx
User’s Manual
IBM PowerPC 750GX and 750GL RISC Microprocessor
Programming Model
Page 92 of 377
gx_02.fm.(1.2)
March 27, 2006
Summary” in the PowerPC Microprocessor Family: The Programming Environments Manual. These categori-
zations are somewhat arbitrary and are provided for the convenience of the programmer and do not neces-
sarily reflect the PowerPC Architecture specification.
zations are somewhat arbitrary and are provided for the convenience of the programmer and do not neces-
sarily reflect the PowerPC Architecture specification.
Note that some instructions have the following optional features:
• CR Update—The dot (.) suffix on the mnemonic enables the update of the CR.
• Overflow option—The o suffix indicates that the overflow bit in the XER is enabled.
2.3.4 PowerPC UISA Instructions
The PowerPC UISA includes the base user-level instruction set (excluding a few user-level cache-control,
synchronization, and time-base instructions), user-level registers, programming model, data types, and
addressing modes. This section discusses the instructions defined in the UISA.
synchronization, and time-base instructions), user-level registers, programming model, data types, and
addressing modes. This section discusses the instructions defined in the UISA.
2.3.4.1 Integer Instructions
This section describes the integer instructions, which consist of:
• Integer arithmetic instructions
• Integer compare instructions
• Integer logical instructions
• Integer rotate and shift instructions
• Integer compare instructions
• Integer logical instructions
• Integer rotate and shift instructions
Integer instructions use the content of the GPRs as source operands and place results into GPRs, into the
Integer Exception Register (XER), and into Condition Register (CR) fields.
Integer Exception Register (XER), and into Condition Register (CR) fields.
Integer Arithmetic Instructions
Table 2-7 lists the integer arithmetic instructions for PowerPC processors.
Table 2-7. Integer Arithmetic Instructions
(Page 1 of 2)
Name Mnemonic
Syntax
Add Immediate
addi
rD,rA,SIMM
Add Immediate Shifted
addis
rD,rA,SIMM
Add
add (add. addo addo.)
rD,rA,rB
Subtract From
subf (subf. subfo subfo.)
rD,rA,rB
Add Immediate Carrying
addic
rD,rA,SIMM
Add Immediate Carrying and Record
addic.
rD,rA,SIMM
Subtract from Immediate Carrying
subfic
rD,rA,SIMM
Add Carrying
addc (addc. addco addco.)
rD,rA,rB
Subtract from Carrying
subfc (subfc. subfco subfco.)
rD,rA,rB
Add Extended
adde (adde. addeo addeo.)
rD,rA,rB
Subtract from Extended
subfe (subfe. subfeo subfeo.)
rD,rA,rB
Add to Minus One Extended
addme (addme. addmeo addmeo.)
rD,rA
Subtract from Minus One Extended
subfme (subfme. subfmeo subfmeo.)
rD,rA