PPC
Class PPCFrame

java.lang.Object
  Frame.Frame
      PPC.PPCFrame

Direct Known Subclasses:

DarwinFrame, LinuxFrame

public abstract class PPCFrame

extends Frame

Represents PowerPC stack frames.

ppc stack frames look like this after procedure prolog has been executed: Higher address: ......... +-------------------------------+ | caller's LR | +-------------------------------+ | caller's CR | +-------------------------------+ Caller's SP->| caller's caller's sp | ^^ Caller's Frame ^^ +===============================+ vv Callee's Frame vv | Save Area for | FPF 31 .......... | Caller's FPF's | FPF n +-------------------------------+ | Save Area for | GRF 31 .......... | Caller's GRF's | GRF n +-------------------------------+ | alignment pad | ............ | (if necessary) | +-------------------------------+ | Local | ........ | Variables | +-------------------------------+ SP + X -> | aN for FUTURE call | +-------------------------------+ .......... +-------------------------------+ SP + 28 -> | a1 for FUTURE call | +-------------------------------+ SP + 24 -> | a0 for FUTURE call | +-------------------------------+ SP + 20 -> | caller's TOC | +-------------------------------+ SP + 16 -> | reserved | +-------------------------------+ SP + 12 -> | reserved | +-------------------------------+ SP + 8 -> | LR callee-save for FUTURE call| +-------------------------------+ SP + 4 -> | CR callee-save for FUTURE call| +-------------------------------+ SP -> | caller's sp | +===============================+ Lower address: NOTE: All state with the exception of LR and CR are saved in the callee's frame. LR and CR are saved in the CALLER'S FRAME. ALSO NOTE: Args to the callee are found in the caller's frame.

Field Summary

Temp

RV

Fields inherited from class Frame.Frame

global, maxArgsOut, name

Constructor Summary

PPCFrame()

Method Summary

Access	allocFormal(java.lang.String s) Allocate a formal parameter named s in this frame.
Access	allocLocal(java.lang.String s) Allocate a local variable named s in this frame.
Label	badPtr()
Label	badSub()
Visitor<Temp,java.util.LinkedList<Instr>>	codegen()
void	procEntryExit1(java.util.LinkedList<Stm> body)
void	procEntryExit2(java.util.LinkedList<Instr> insns)
void	procEntryExit3(java.util.LinkedList<Instr> insns, TempMap map)
java.lang.String	record(Label lab, int words)
Exp	RV()
java.lang.String	string(Label lab, java.lang.String string)
java.lang.String	vtable(Label lab, java.util.LinkedList<Label> values)
int	wordSize()

Methods inherited from class Frame.Frame

external, mainFrame, newFrame, registers

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

RV

public Temp RV

Constructor Detail

PPCFrame

public PPCFrame()

Method Detail

wordSize

public int wordSize()

Specified by:

wordSize in class Frame

allocFormal

public Access allocFormal(java.lang.String s)

Description copied from class: Frame

Allocate a formal parameter named s in this frame.

Specified by:

allocFormal in class Frame

allocLocal

public Access allocLocal(java.lang.String s)

Description copied from class: Frame

Allocate a local variable named s in this frame. If s is null, then the variable is forced to be allocated in memory in the frame. If s is non-null, then the variable is eligible for register allocation.

Specified by:

allocLocal in class Frame

RV

public Exp RV()

Specified by:

RV in class Frame

string

public java.lang.String string(Label lab,
                               java.lang.String string)

Specified by:

string in class Frame

record

public java.lang.String record(Label lab,
                               int words)

Specified by:

record in class Frame

vtable

public java.lang.String vtable(Label lab,
                               java.util.LinkedList<Label> values)

Specified by:

vtable in class Frame

badPtr

public Label badPtr()

Specified by:

badPtr in class Frame

badSub

public Label badSub()

Specified by:

badSub in class Frame

codegen

public Visitor<Temp,java.util.LinkedList<Instr>> codegen()

Specified by:

codegen in class Frame

procEntryExit1

public void procEntryExit1(java.util.LinkedList<Stm> body)

Specified by:

procEntryExit1 in class Frame

procEntryExit2

public void procEntryExit2(java.util.LinkedList<Instr> insns)

Specified by:

procEntryExit2 in class Frame

procEntryExit3

public void procEntryExit3(java.util.LinkedList<Instr> insns,
                           TempMap map)

Specified by:

procEntryExit3 in class Frame