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/* -*- mode: hugs-c; -*- */
/* -----------------------------------------------------------------------------
* Bytecode assembler
*
* Copyright (c) 1994-1998.
*
* $RCSfile: Assembler.h,v $
* $Revision: 1.3 $
* $Date: 1999/01/18 15:23:30 $
*
* NB This is one of the few files shared between Hugs and the runtime system,
* so it is very important that it not conflict with either and that it not
* rely on either.
* (In fact, it might be fun to create a GreenCard interface to this file too.)
* ---------------------------------------------------------------------------*/
/* ToDo: put this somewhere more sensible */
extern void DEBUG_LoadSymbols( char *name );
/* This file is supposed to be somewhat self-contained because it is one
* of the major external interfaces to the runtime system.
* Keeping it self-contained reduces the chance of conflict with Hugs
* (or anything else that includes it).
* The big disadvantage of being self-contained is that definitions
* like AsmNat8, etc duplicate definitions in StgTypes.h.
* I'm not sure what we can do about this but, if you try to fix it,
* please remember why it was done this way in the first place.
* -- ADR
*/
typedef unsigned char AsmNat8;
typedef unsigned int AsmNat;
typedef signed int AsmInt;
typedef signed long long int AsmInt64; /* ToDo: not portable! */
typedef unsigned int AsmWord;
typedef void* AsmAddr;
typedef unsigned char AsmChar;
typedef float AsmFloat; /* ToDo: not on Alphas! */
typedef double AsmDouble;
typedef char* AsmString;
/* I want to #include this file into the file that defines the
* functions but I don't want to expose the structures that
* these types point to.
* This hack is the best I could think of. Surely there's a better way?
*/
#ifdef INSIDE_ASSEMBLER_C
typedef struct AsmObject_ *AsmObject;
typedef struct AsmBCO_ *AsmBCO;
typedef struct AsmCAF_ *AsmCAF;
typedef struct AsmCon_ *AsmCon;
typedef StgInfoTable *AsmInfo;
typedef StgClosure *AsmClosure;
typedef Instr AsmInstr;
#else
/* the types we export are totally opaque */
typedef void *AsmObject;
typedef void *AsmBCO;
typedef void *AsmCAF;
typedef void *AsmCon;
typedef void *AsmInfo;
typedef void *AsmClosure;
typedef unsigned int AsmInstr;
#endif
typedef int AsmSp; /* stack offset */
typedef int AsmPc; /* program counter */
typedef AsmSp AsmVar; /* offset of a Var on the stack */
/* --------------------------------------------------------------------------
* "Types" used within the assembler
*
* Some of these types are synonyms for the same underlying representation
* to let Hugs (or whoever) generate useful Haskell types from the type
* of a primitive operation.
*
* Extreme care should be taken if you change any of these - the
* same constants are hardwired into Hugs (ILLEGAL_REP) and into
* pieces of assembly language used to implement foreign import/export.
* And, of course, you'll have to change the primop table in Assembler.c
* ------------------------------------------------------------------------*/
typedef enum {
ILLEGAL_REP = 0,
/* The following can be passed to C */
CHAR_REP = 'C',
INT_REP = 'I',
#ifdef PROVIDE_INT64
INT64_REP = 'z',
#endif
#ifdef PROVIDE_INTEGER
INTEGER_REP = 'Z',
#endif
#ifdef PROVIDE_WORD
WORD_REP = 'W',
#endif
#ifdef PROVIDE_ADDR
ADDR_REP = 'A',
#endif
FLOAT_REP = 'F',
DOUBLE_REP = 'D',
#ifdef PROVIDE_STABLE
STABLE_REP = 's', /* StablePtr a */
#endif
#ifdef PROVIDE_FOREIGN
FOREIGN_REP = 'f', /* ForeignObj */
#endif
#ifdef PROVIDE_WEAK
WEAK_REP = 'w', /* Weak a */
#endif
#ifdef PROVIDE_ARRAY
BARR_REP = 'x', /* PrimByteArray a */
MUTBARR_REP = 'm', /* PrimMutableByteArray s a */
#endif
/* The following can't be passed to C */
PTR_REP = 'P',
ALPHA_REP = 'a', /* a */
BETA_REP = 'b', /* b */
GAMMA_REP = 'c', /* c */
BOOL_REP = 'B', /* Bool */
IO_REP = 'i', /* IO a */
HANDLER_REP = 'H', /* Exception -> IO a */
ERROR_REP = 'E', /* Exception */
#ifdef PROVIDE_ARRAY
ARR_REP = 'X', /* PrimArray a */
REF_REP = 'R', /* Ref s a */
MUTARR_REP = 'M', /* PrimMutableArray s a */
#endif
#ifdef PROVIDE_CONCURRENT
THREADID_REP = 'T', /* ThreadId */
MVAR_REP = 'r', /* MVar a */
#endif
/* Allegedly used in the IO monad */
VOID_REP = 'v'
} AsmRep;
/* --------------------------------------------------------------------------
* Allocating (top level) heap objects
* ------------------------------------------------------------------------*/
extern AsmBCO asmBeginBCO ( void );
extern void asmEndBCO ( AsmBCO bco );
extern AsmBCO asmBeginContinuation ( AsmSp sp );
extern void asmEndContinuation ( AsmBCO bco );
extern AsmObject asmMkObject ( AsmClosure c );
extern AsmCAF asmBeginCAF ( void );
extern void asmEndCAF ( AsmCAF caf, AsmBCO body );
extern AsmInfo asmMkInfo ( AsmNat tag, AsmNat ptrs );
extern AsmCon asmBeginCon ( AsmInfo info );
extern void asmEndCon ( AsmCon con );
/* NB: we add ptrs to other objects in left-to-right order.
* This is different from pushing arguments on the stack which is done
* in right to left order.
*/
extern void asmAddPtr ( AsmObject obj, AsmObject arg );
extern int asmObjectHasClosure( AsmObject obj );
extern AsmClosure asmClosureOfObject ( AsmObject obj );
extern void asmMarkObject ( AsmObject obj );
/* --------------------------------------------------------------------------
* Generating instruction streams
* ------------------------------------------------------------------------*/
extern AsmSp asmBeginArgCheck ( AsmBCO bco );
extern void asmEndArgCheck ( AsmBCO bco, AsmSp last_arg );
extern AsmSp asmBeginEnter ( AsmBCO bco );
extern void asmEndEnter ( AsmBCO bco, AsmSp sp1, AsmSp sp2 );
extern AsmVar asmBind ( AsmBCO bco, AsmRep rep );
extern void asmVar ( AsmBCO bco, AsmVar v, AsmRep rep );
extern AsmSp asmBeginCase ( AsmBCO bco );
extern void asmEndCase ( AsmBCO bco );
extern AsmSp asmContinuation ( AsmBCO bco, AsmBCO ret_addr );
extern AsmSp asmBeginAlt ( AsmBCO bco );
extern void asmEndAlt ( AsmBCO bco, AsmSp sp );
extern AsmPc asmTest ( AsmBCO bco, AsmWord tag );
extern AsmPc asmTestInt ( AsmBCO bco, AsmVar v, AsmInt x );
extern void asmFixBranch ( AsmBCO bco, AsmPc pc );
extern void asmPanic ( AsmBCO bco );
extern AsmVar asmBox ( AsmBCO bco, AsmRep rep );
extern AsmVar asmUnbox ( AsmBCO bco, AsmRep rep );
extern void asmReturnUnboxed ( AsmBCO bco, AsmRep rep );
/* push unboxed Ints, Floats, etc */
extern void asmConstInt ( AsmBCO bco, AsmInt x );
#ifdef PROVIDE_ADDR
extern void asmConstAddr ( AsmBCO bco, AsmAddr x );
#endif
#ifdef PROVIDE_WORD
extern void asmConstWord ( AsmBCO bco, AsmWord x );
#endif
extern void asmConstChar ( AsmBCO bco, AsmChar x );
extern void asmConstFloat ( AsmBCO bco, AsmFloat x );
extern void asmConstDouble ( AsmBCO bco, AsmDouble x );
#ifdef PROVIDE_INT64
extern void asmConstInt64 ( AsmBCO bco, AsmInt64 x );
#endif
#ifdef PROVIDE_INTEGER
extern void asmConstInteger ( AsmBCO bco, AsmString x );
#endif
/* Which monad (if any) does the primop live in? */
typedef enum {
MONAD_Id, /* no monad (aka the identity monad) */
MONAD_ST,
MONAD_IO
} AsmMonad;
typedef struct {
char* name;
char* args;
char* results;
AsmMonad monad;
AsmNat8 prefix; /* should be StgInstr */
AsmNat8 opcode; /* should be Primop1 or Primop2 */
} AsmPrim;
extern const AsmPrim asmPrimOps[]; /* null terminated list */
extern const AsmPrim* asmFindPrim ( char* s );
extern const AsmPrim* asmFindPrimop ( AsmInstr prefix, AsmInstr op );
extern AsmSp asmBeginPrim ( AsmBCO bco );
extern void asmEndPrim ( AsmBCO bco, const AsmPrim* prim, AsmSp base );
/* --------------------------------------------------------------------------
* Heap manipulation
* ------------------------------------------------------------------------*/
extern AsmVar asmClosure ( AsmBCO bco, AsmObject p );
extern AsmVar asmAllocCONSTR ( AsmBCO bco, AsmInfo info );
extern AsmSp asmBeginPack ( AsmBCO bco );
extern void asmEndPack ( AsmBCO bco, AsmVar v, AsmSp start, AsmInfo info );
extern void asmBeginUnpack ( AsmBCO bco );
extern void asmEndUnpack ( AsmBCO bco );
extern AsmVar asmAllocAP ( AsmBCO bco, AsmNat size );
extern AsmSp asmBeginMkAP ( AsmBCO bco );
extern void asmEndMkAP ( AsmBCO bco, AsmVar v, AsmSp start );
extern AsmVar asmAllocPAP ( AsmBCO bco, AsmNat size );
extern AsmSp asmBeginMkPAP ( AsmBCO bco );
extern void asmEndMkPAP ( AsmBCO bco, AsmVar v, AsmSp start );
/* --------------------------------------------------------------------------
* C-call and H-call
* ------------------------------------------------------------------------*/
extern const AsmPrim ccall_Id;
extern const AsmPrim ccall_IO;
typedef struct {
char * arg_tys;
int arg_size;
char * result_tys;
int result_size;
} CFunDescriptor;
typedef struct {
char * arg_tys;
char * result_tys;
} HFunDescriptor;
CFunDescriptor* mkDescriptor( char* as, char* rs );
/*-------------------------------------------------------------------------*/
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