X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fincludes%2FRegs.h;h=02032384127c333634b66ff21da5f63774862717;hb=ecb1a539308e65d242d963f00adc8c6c41e4972a;hp=1cbca51ffdb673b067b05c4515db1dd435b44b83;hpb=0bffc410964e1688ad80d277d53400659e697ab5;p=ghc-hetmet.git diff --git a/ghc/includes/Regs.h b/ghc/includes/Regs.h index 1cbca51..0203238 100644 --- a/ghc/includes/Regs.h +++ b/ghc/includes/Regs.h @@ -1,20 +1,27 @@ /* ----------------------------------------------------------------------------- - * $Id: Regs.h,v 1.12 2002/12/11 15:36:37 simonmar Exp $ * - * (c) The GHC Team, 1998-1999 + * (c) The GHC Team, 1998-2004 * - * Registers used in STG code. Might or might not correspond to - * actual machine registers. + * Registers in the STG machine. + * + * The STG machine has a collection of "registers", each one of which + * may or may not correspond to an actual machine register when + * running code. + * + * The register set is backed by a table in memory (struct + * StgRegTable). If a particular STG register is not mapped to a + * machine register, then the apprpriate slot in this table is used + * instead. + * + * This table is itself pointed to by another register, BaseReg. If + * BaseReg is not in a machine register, then the register table is + * used from an absolute location (MainCapability). * * ---------------------------------------------------------------------------*/ #ifndef REGS_H #define REGS_H -/* - * This file should do the right thing if we have no machine-registers - * defined, i.e. everything lives in the RegTable. - */ /* * This is the table that holds shadow-locations for all the STG @@ -37,6 +44,25 @@ typedef struct { StgFunPtr stgGCFun; } StgFunTable; +/* + * Vanilla registers are given this union type, which is purely so + * that we can cast the vanilla reg to a variety of types with the + * minimum of syntax. eg. R1.w instead of (StgWord)R1. + */ +typedef union { + StgWord w; + StgAddr a; + StgChar c; + StgInt8 i8; + StgFloat f; + StgInt i; + StgPtr p; + StgClosurePtr cl; + StgStackOffset offset; /* unused? */ + StgByteArray b; + StgTSOPtr t; +} StgUnion; + typedef struct StgRegTable_ { StgUnion rR1; StgUnion rR2; @@ -46,8 +72,8 @@ typedef struct StgRegTable_ { StgUnion rR6; StgUnion rR7; StgUnion rR8; - StgUnion rR9; // used occasionally by heap/stack checks - StgUnion rR10; // used occasionally by heap/stack checks + StgUnion rR9; /* used occasionally by heap/stack checks */ + StgUnion rR10; /* used occasionally by heap/stack checks */ StgFloat rF1; StgFloat rF2; StgFloat rF3; @@ -59,13 +85,16 @@ typedef struct StgRegTable_ { StgPtr rSpLim; StgPtr rHp; StgPtr rHpLim; - StgTSO *rCurrentTSO; - struct _bdescr *rNursery; - struct _bdescr *rCurrentNursery; - StgWord rHpAlloc; // number of words being allocated in heap + struct StgTSO_ *rCurrentTSO; + struct step_ *rNursery; + struct bdescr_ *rCurrentNursery; + StgWord rHpAlloc; /* number of *bytes* being allocated in heap */ #if defined(SMP) || defined(PAR) - StgSparkPool rSparks; // per-task spark pool + StgSparkPool rSparks; /* per-task spark pool */ #endif + StgWord rInHaskell; /* non-zero if we're in Haskell code */ + // If this flag is set, we are running Haskell code. Used to detect + // uses of 'foreign import unsafe' that should be 'safe'. } StgRegTable; @@ -82,12 +111,16 @@ typedef struct Capability_ { #endif } Capability; -/* No such thing as a MainRegTable under SMP - each thread must - * have its own MainRegTable. +/* No such thing as a MainCapability under SMP - each thread must have + * its own Capability. */ #ifndef SMP +#if IN_STG_CODE +extern W_ MainCapability[]; +#else extern DLL_IMPORT_RTS Capability MainCapability; #endif +#endif #if IN_STG_CODE @@ -129,12 +162,10 @@ extern DLL_IMPORT_RTS Capability MainCapability; #define SAVE_CurrentTSO (BaseReg->rCurrentTSO) #define SAVE_CurrentNursery (BaseReg->rCurrentNursery) #define SAVE_HpAlloc (BaseReg->rHpAlloc) -#if defined(SMP) || defined(PAR) #define SAVE_SparkHd (BaseReg->rSparks.hd) #define SAVE_SparkTl (BaseReg->rSparks.tl) #define SAVE_SparkBase (BaseReg->rSparks.base) #define SAVE_SparkLim (BaseReg->rSparks.lim) -#endif /* We sometimes need to save registers across a C-call, eg. if they * are clobbered in the standard calling convention. We define the @@ -175,105 +206,109 @@ extern DLL_IMPORT_RTS Capability MainCapability; * again for no good reason (on register-poor architectures). */ +/* define NO_REGS to omit register declarations - used in RTS C code + * that needs all the STG definitions but not the global register + * settings. + */ #define GLOBAL_REG_DECL(type,name,reg) register type name REG(reg); -#ifdef REG_R1 +#if defined(REG_R1) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R1,REG_R1) #else -#define R1 (BaseReg->rR1) +# define R1 (BaseReg->rR1) #endif -#ifdef REG_R2 +#if defined(REG_R2) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R2,REG_R2) #else -#define R2 (BaseReg->rR2) +# define R2 (BaseReg->rR2) #endif -#ifdef REG_R3 +#if defined(REG_R3) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R3,REG_R3) #else # define R3 (BaseReg->rR3) #endif -#ifdef REG_R4 +#if defined(REG_R4) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R4,REG_R4) #else # define R4 (BaseReg->rR4) #endif -#ifdef REG_R5 +#if defined(REG_R5) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R5,REG_R5) #else # define R5 (BaseReg->rR5) #endif -#ifdef REG_R6 +#if defined(REG_R6) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R6,REG_R6) #else # define R6 (BaseReg->rR6) #endif -#ifdef REG_R7 +#if defined(REG_R7) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R7,REG_R7) #else # define R7 (BaseReg->rR7) #endif -#ifdef REG_R8 +#if defined(REG_R8) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R8,REG_R8) #else # define R8 (BaseReg->rR8) #endif -#ifdef REG_R9 +#if defined(REG_R9) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R9,REG_R9) #else # define R9 (BaseReg->rR9) #endif -#ifdef REG_R10 +#if defined(REG_R10) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgUnion,R10,REG_R10) #else # define R10 (BaseReg->rR10) #endif -#ifdef REG_F1 +#if defined(REG_F1) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgFloat,F1,REG_F1) #else #define F1 (BaseReg->rF1) #endif -#ifdef REG_F2 +#if defined(REG_F2) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgFloat,F2,REG_F2) #else #define F2 (BaseReg->rF2) #endif -#ifdef REG_F3 +#if defined(REG_F3) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgFloat,F3,REG_F3) #else #define F3 (BaseReg->rF3) #endif -#ifdef REG_F4 +#if defined(REG_F4) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgFloat,F4,REG_F4) #else #define F4 (BaseReg->rF4) #endif -#ifdef REG_D1 +#if defined(REG_D1) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgDouble,D1,REG_D1) #else #define D1 (BaseReg->rD1) #endif -#ifdef REG_D2 +#if defined(REG_D2) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgDouble,D2,REG_D2) #else #define D2 (BaseReg->rD2) #endif -#ifdef REG_L1 +#if defined(REG_L1) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgWord64,L1,REG_L1) #else #define L1 (BaseReg->rL1) @@ -285,76 +320,76 @@ GLOBAL_REG_DECL(StgWord64,L1,REG_L1) * concurrent Haskell, MainRegTable otherwise). */ -#ifdef REG_Base +#if defined(REG_Base) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(StgRegTable *,BaseReg,REG_Base) #else #ifdef SMP #error BaseReg must be in a register for SMP #endif -#define BaseReg (&MainCapability.r) +#define BaseReg (&((Capability *)MainCapability)[0].r) #endif -#ifdef REG_Sp +#if defined(REG_Sp) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(P_,Sp,REG_Sp) #else #define Sp (BaseReg->rSp) #endif -#ifdef REG_SpLim +#if defined(REG_SpLim) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(P_,SpLim,REG_SpLim) #else #define SpLim (BaseReg->rSpLim) #endif -#ifdef REG_Hp +#if defined(REG_Hp) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(P_,Hp,REG_Hp) #else #define Hp (BaseReg->rHp) #endif -#ifdef REG_HpLim +#if defined(REG_HpLim) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(P_,HpLim,REG_HpLim) #else #define HpLim (BaseReg->rHpLim) #endif -#ifdef REG_CurrentTSO -GLOBAL_REG_DECL(StgTSO *,CurrentTSO,REG_CurrentTSO) +#if defined(REG_CurrentTSO) && !defined(NO_GLOBAL_REG_DECLS) +GLOBAL_REG_DECL(struct _StgTSO *,CurrentTSO,REG_CurrentTSO) #else #define CurrentTSO (BaseReg->rCurrentTSO) #endif -#ifdef REG_CurrentNursery +#if defined(REG_CurrentNursery) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(bdescr *,CurrentNursery,REG_CurrentNursery) #else #define CurrentNursery (BaseReg->rCurrentNursery) #endif -#ifdef REG_HpAlloc +#if defined(REG_HpAlloc) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(bdescr *,HpAlloc,REG_HpAlloc) #else #define HpAlloc (BaseReg->rHpAlloc) #endif -#ifdef REG_SparkHd +#if defined(REG_SparkHd) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(bdescr *,SparkHd,REG_SparkHd) #else #define SparkHd (BaseReg->rSparks.hd) #endif -#ifdef REG_SparkTl +#if defined(REG_SparkTl) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(bdescr *,SparkTl,REG_SparkTl) #else #define SparkTl (BaseReg->rSparks.tl) #endif -#ifdef REG_SparkBase +#if defined(REG_SparkBase) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(bdescr *,SparkBase,REG_SparkBase) #else #define SparkBase (BaseReg->rSparks.base) #endif -#ifdef REG_SparkLim +#if defined(REG_SparkLim) && !defined(NO_GLOBAL_REG_DECLS) GLOBAL_REG_DECL(bdescr *,SparkLim,REG_SparkLim) #else #define SparkLim (BaseReg->rSparks.lim) @@ -712,7 +747,6 @@ GLOBAL_REG_DECL(bdescr *,SparkLim,REG_SparkLim) #define CALLER_RESTORE_SYSTEM /* nothing */ #endif /* IN_STG_CODE */ - #define CALLER_SAVE_ALL \ CALLER_SAVE_SYSTEM \ CALLER_SAVE_USER @@ -722,4 +756,3 @@ GLOBAL_REG_DECL(bdescr *,SparkLim,REG_SparkLim) CALLER_RESTORE_USER #endif /* REGS_H */ -