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\section[STGRegs]{Macros for saving/restoring STG registers}
\begin{code}
#ifndef STGREGS_H
#define STGREGS_H
\end{code}
%************************************************************************
%* *
\subsection[saving-restoring-STG-regs]{Saving/restoring STG registers}
%* *
%************************************************************************
These routines will fail on the SPARC if they are allowed to drop out-of-line
(the wrong register window will be active).
\begin{code}
#if defined(__STG_GCC_REGS__) && defined(MAIN_REG_MAP)
EXTDATA(STK_STUB_closure);
EXTFUN(STK_STUB_entry);
EXTDATA_RO(vtbl_StdUpdFrame);
/* Keep -Wmissing-prototypes from complaining */
void SaveAllStgRegs(STG_NO_ARGS);
void SaveAllStgContext(STG_NO_ARGS);
void SaveStgStackRegs(STG_NO_ARGS);
void RestoreAllStgRegs(STG_NO_ARGS);
void RestoreStackStgRegs(STG_NO_ARGS);
extern STG_INLINE
void SaveAllStgRegs(STG_NO_ARGS)
{
#ifdef REG_R1
SAVE_R1 = R1;
#endif
#ifdef REG_R2
SAVE_R2 = R2;
#endif
#ifdef REG_R3
SAVE_R3 = R3;
#endif
#ifdef REG_R4
SAVE_R4 = R4;
#endif
#ifdef REG_R5
SAVE_R5 = R5;
#endif
#ifdef REG_R6
SAVE_R6 = R6;
#endif
#ifdef REG_R7
SAVE_R7 = R7;
#endif
#ifdef REG_R8
SAVE_R8 = R8;
#endif
#ifdef REG_Flt1
SAVE_Flt1 = FltReg1;
#endif
#ifdef REG_Flt2
SAVE_Flt2 = FltReg2;
#endif
#ifdef REG_Flt3
SAVE_Flt3 = FltReg3;
#endif
#ifdef REG_Flt4
SAVE_Flt4 = FltReg4;
#endif
#ifdef REG_Dbl1
SAVE_Dbl1 = DblReg1;
#endif
#ifdef REG_Dbl2
SAVE_Dbl2 = DblReg2;
#endif
#ifdef REG_Tag
SAVE_Tag = TagReg;
#endif
#ifdef REG_Ret
SAVE_Ret = RetReg;
#endif
#if defined(REG_SpA) || defined(CONCURRENT)
SAVE_SpA = SpA;
#endif
#if defined(REG_SuA) || defined(CONCURRENT)
SAVE_SuA = SuA;
#endif
#if defined(REG_SpB) || defined(CONCURRENT)
SAVE_SpB = SpB;
#endif
#if defined(REG_SuB) || defined(CONCURRENT)
SAVE_SuB = SuB;
#endif
SAVE_Hp = Hp; /* always! */
SAVE_HpLim = HpLim; /* ditto! */
#if defined(DO_INSTR_COUNTING)
#ifdef REG_Activity
SAVE_Activity = ActivityReg;
#endif
#endif
}
extern STG_INLINE
void SaveAllStgContext(STG_NO_ARGS)
{
SaveAllStgRegs();
#ifdef CONCURRENT
TSO_CCC(CurrentTSO) = CCC;
CCC = (CostCentre)STATIC_CC_REF(CC_MAIN);
SET_RETADDR(TSO_PC2(CurrentTSO))
#endif
}
extern STG_INLINE
void SaveStgStackRegs(STG_NO_ARGS)
{
#if defined(REG_SpA) || defined(CONCURRENT)
SAVE_SpA = SpA;
#endif
#if defined(REG_SuA) || defined(CONCURRENT)
SAVE_SuA = SuA;
#endif
#if defined(REG_SpB) || defined(CONCURRENT)
SAVE_SpB = SpB;
#endif
#if defined(REG_SuB) || defined(CONCURRENT)
SAVE_SuB = SuB;
#endif
}
extern STG_INLINE void
RestoreAllStgRegs (STG_NO_ARGS)
{
#ifdef REG_Base
/* Re-initialise the register table pointer */
BaseReg = &MainRegTable;
#endif
#ifdef REG_R1
R1 = SAVE_R1;
#endif
#ifdef REG_R2
R2 = SAVE_R2;
#endif
#ifdef REG_R3
R3 = SAVE_R3;
#endif
#ifdef REG_R4
R4 = SAVE_R4;
#endif
#ifdef REG_R5
R5 = SAVE_R5;
#endif
#ifdef REG_R6
R6 = SAVE_R6;
#endif
#ifdef REG_R7
R7 = SAVE_R7;
#endif
#ifdef REG_R8
R8 = SAVE_R8;
#endif
#ifdef REG_Flt1
FltReg1 = SAVE_Flt1;
#endif
#ifdef REG_Flt2
FltReg2 = SAVE_Flt2;
#endif
#ifdef REG_Flt3
FltReg3 = SAVE_Flt3;
#endif
#ifdef REG_Flt4
FltReg4 = SAVE_Flt4;
#endif
#ifdef REG_Dbl1
DblReg1 = SAVE_Dbl1;
#endif
#ifdef REG_Dbl2
DblReg2 = SAVE_Dbl2;
#endif
#ifdef REG_Tag
TagReg = SAVE_Tag;
#endif
#ifdef REG_Ret
RetReg = SAVE_Ret;
#endif
#if defined(REG_StkO) && defined(CONCURRENT)
StkOReg = SAVE_StkO;
#endif
#if defined(REG_SpA) || defined(CONCURRENT)
SpA = SAVE_SpA;
#endif
#if defined(REG_SuA) || defined(CONCURRENT)
SuA = SAVE_SuA;
#endif
#if defined(REG_SpB) || defined(CONCURRENT)
SpB = SAVE_SpB;
#endif
#if defined(REG_SuB) || defined(CONCURRENT)
SuB = SAVE_SuB;
#endif
Hp = SAVE_Hp; /* always! */
HpLim = SAVE_HpLim; /* ditto! */
#ifdef REG_StdUpdRetVec
StdUpdRetVecReg = vtbl_StdUpdFrame;
#endif
#ifdef REG_StkStub
StkStubReg = STK_STUB_closure;
#endif
#if defined(DO_INSTR_COUNTING) && defined(REG_Activity)
ActivityReg = SAVE_Activity;
#endif
#ifdef CONCURRENT
CCC = TSO_CCC(CurrentTSO);
#endif
}
extern STG_INLINE void
RestoreStackStgRegs (STG_NO_ARGS)
{
#if defined(REG_SpA) || defined(CONCURRENT)
SpA = SAVE_SpA;
#endif
#if defined(REG_SuA) || defined(CONCURRENT)
SuA = SAVE_SuA;
#endif
#if defined(REG_SpB) || defined(CONCURRENT)
SpB = SAVE_SpB;
#endif
#if defined(REG_SuB) || defined(CONCURRENT)
SuB = SAVE_SuB;
#endif
}
#else /* For the unwashed and unregisterized */
#ifdef CONCURRENT
#define SaveAllStgRegs() \
do { \
SAVE_Hp = Hp; \
SAVE_HpLim = HpLim; \
SAVE_SpA = SpA; \
SAVE_SuA = SuA; \
SAVE_SpB = SpB; \
SAVE_SuB = SuB; \
} while(0)
#define RestoreAllStgRegs() \
do { \
Hp = SAVE_Hp; \
HpLim = SAVE_HpLim; \
SpA = SAVE_SpA; \
SuA = SAVE_SuA; \
SpB = SAVE_SpB; \
SuB = SAVE_SuB; \
} while(0)
#define RestoreStackStgRegs() \
do { \
SpA = SAVE_SpA; \
SuA = SAVE_SuA; \
SpB = SAVE_SpB; \
SuB = SAVE_SuB; \
} while(0)
#else
#define SaveAllStgRegs() do {SAVE_Hp = Hp; SAVE_HpLim = HpLim;} while(0)
#define RestoreAllStgRegs() do {Hp = SAVE_Hp; HpLim = SAVE_HpLim;} while(0)
#define RestoreStackStgRegs() /* nothing */
#endif /* CONCURRENT */
#define SaveAllStgContext() SaveAllStgRegs()
#endif /* __STG_GCC_REGS__ && MAIN_REG_MAP */
#endif /* STGREGS_H */
\end{code}
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