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/*
* Copyright (c) 2002 by The XFree86 Project, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of the XFree86 Project shall
* not be used in advertising or otherwise to promote the sale, use or other
* dealings in this Software without prior written authorization from the
* XFree86 Project.
*
* Author: Paulo César Pereira de Andrade
*/
/* $XFree86$ */
#include "lisp/private.h"
#ifndef Lisp_Bytecode_h
#define Lisp_Bytecode_h
/* Number of arguments for &REST functions with no side effects,
* i.e. does not need to allocate new cells to build argument list.
* If this value is changed, it is also required to add more
* XBC_BCONS? opcodes and change ExecuteBytecode() */
#define MAX_BCONS 8
typedef enum {
XBP_CONSP,
XBP_LISTP,
XBP_NUMBERP
} LispBytePredicate;
typedef enum {
XBC_NOOP,
XBC_INV, /* If NIL loaded, change to T else to NIL */
XBC_NIL, /* Load NIL */
XBC_T, /* Load T */
XBC_PRED, /* Preffix for predicate test */
/* Followed by byte indicating test */
XBC_CAR, /* Set loaded value to it's car */
XBC_CDR, /* Set loaded value to it's cdr */
XBC_CAR_SET, /* Set local variable to CAR or CDR of loaded value */
XBC_CDR_SET,
/* Offset of local variable follows */
/* Sets C[AD]R of top of builtin stack with
* loaded value and pop builtin stack */
XBC_RPLACA,
XBC_RPLACD,
/* Push only one argument in builtin stack, and call directly
* LispObjectCompare without the need of pushing the second arguument */
XBC_EQ,
XBC_EQL,
XBC_EQUAL,
XBC_EQUALP,
XBC_LENGTH,
XBC_LAST,
XBC_NTHCDR,
XBC_CAR_PUSH, /* Pushes CAR or CDR of loaded value to builtin stack */
XBC_CDR_PUSH,
XBC_PUSH, /* Push argument in builtin stack */
XBC_PUSH_NIL, /* Pushes NIL in builtin stack */
XBC_PUSH_UNSPEC, /* Pushes #<UNSPEC> in builtin stack */
XBC_PUSH_T, /* Pushes T in builtin stack */
XBC_PUSH_NIL_N, /* Pushes NIL in the builtin stack N times */
XBC_PUSH_UNSPEC_N, /* Pushes #<UNSPEC> in the builtin stack N times */
/* The builtin stack base is saved when entering the bytecode
* interpreter, and the bytecode does not reenter from builtin
* functions, yet, so there is no need, for XBC_BSAVE and
* XBC_BREST instructions */
XBC_LET, /* Push loaded value to stack */
XBC_LETX, /* Push loaded value to stack and bind */
/* Next byte(s) are the symbol offset */
XBC_LET_NIL, /* Push loaded value to stack */
XBC_LETX_NIL, /* Push loaded value to stack and bind */
/* Next byte(s) are the symbol offset */
XBC_LETBIND, /* Bind locally added variables */
/* Followed by number of symbols to bind */
XBC_UNLET, /* Unbind locally binded variables */
/* Followed by number of symbols to unbind */
XBC_LOAD, /* Load argument already from the stack */
/* Followed by offset follows the opcode */
XBC_LOAD_LET, /* Load argument and push */
XBC_LOAD_LETX, /* Load argument, push and bind */
/* Followed by a short and the atom to be bound */
XBC_LOAD_PUSH,
XBC_LOADCON, /* Load a literal constant */
/* Next bytes are the constant object */
XBC_LOADCON_LET, /* Load a literal constant and push */
XBC_LOADCON_LETX, /* Load a literal constant, push and bind */
/* Followed by object constant and symbol to be bound */
XBC_LOADCON_PUSH,
/* Load CAR or CDR of local variable */
XBC_LOAD_CAR,
XBC_LOAD_CDR,
/* Change local variable value to it's CAR or CDR */
XBC_LOAD_CAR_STORE,
XBC_LOAD_CDR_STORE,
XBC_LOADCON_SET,
/* Followed by constant offset and local variable offset */
XBC_LOADSYM, /* Load object symbol value */
/* The object atom pointer follows de opcode */
XBC_LOADSYM_LET, /* Load object symbol value and push */
XBC_LOADSYM_LETX, /* Load object symbol value, push and bind */
/* The symbol atom name and bounded atom name to be bound follows */
XBC_LOADSYM_PUSH,
XBC_LOAD_SET, /* Set value of local variable to the value of another */
/* Followed by two shorts */
XBC_LOAD_CAR_SET, /* Like LOAD_SET, but apply CAR or CDR in the value */
XBC_LOAD_CDR_SET,
XBC_SET, /* Change value of local variable */
/* A short integer with relative offset follows opcode */
XBC_SETSYM, /* Change value of symbol */
/* The atom symbol pointer follows opcode */
XBC_SET_NIL, /* Like XBC_SET but sets the local variable to NIL */
XBC_CALL, /* Call builtin function */
/* 1 byte follows telling how many arguments to use */
/* LispBuiltin pointer follows opcode */
XBC_CALL_SET,
/* Like BCALL, but also followed by an short index of local variable */
XBC_BYTECALL, /* Call bytecode */
/* 1 byte for number of arguments */
/* 1 byte for index in bytecode table */
XBC_FUNCALL,
/* Opcode followed by function and arguments objects, to
* be evaluated at run time, as it was not resolved at
* bytecode generation time (or is not implemented in
* the bytecode compiler) */
XBC_LETREC, /* Recursive function call */
/* 1 byte follows telling how many arguments the funtion receives */
/* Helper for math functions. Uses a preallocated CONS,
* setting it's CAR to the loaded value, and in the same step
* pushes the CONS to the builtin stack */
XBC_BCONS,
/* Like BCONS but it is a list of 2 arguments, first argument
* is saved on the stack, replace with list of 2 arguments */
XBC_BCONS1,
/* Like BCONS1 but it is a list of 3 arguments, first arguments
* are saved on the stack, replace with list of first stack
* argument with list or 3 arguments, and pop stack */
XBC_BCONS2,
XBC_BCONS3,
XBC_BCONS4,
XBC_BCONS5,
XBC_BCONS6,
XBC_BCONS7,
/* Build a CONS */
XBC_CCONS, /* Make CONS of two constants */
/* Constants follow opcode */
XBC_CSTAR, /* Save the CAR of the CONS */
XBC_CFINI, /* Loaded value is the CDR */
/* These are to help in interactively building lists */
XBC_LSTAR, /* Start building a list in the gc protected stack */
XBC_LCONS, /* Add loaded object to list */
XBC_LFINI, /* List is finished */
/* Inconditional jumps */
XBC_JUMP, /* Jump relative to following signed int */
/* Conditional jumps, if true */
XBC_JUMPT, /* Jump relative to following signed int */
/* Conditional jumps, if false */
XBC_JUMPNIL, /* Jump relative to following signed int */
/* Structure field access and type check */
XBC_STRUCT,
XBC_STRUCTP,
XBC_RETURN /* Resume bytecode execution */
} LispByteOpcode;
struct _LispBytecode {
unsigned char *code; /* Bytecode data */
long length; /* length of bytecode stream */
};
/*
* Prototypes
*/
void LispBytecodeInit(void);
LispObj *Lisp_Compile(LispBuiltin*);
LispObj *Lisp_Disassemble(LispBuiltin*);
LispObj *LispCompileForm(LispObj*);
LispObj *LispExecuteBytecode(LispObj*);
void Com_And(LispCom*, LispBuiltin*);
void Com_Block(LispCom*, LispBuiltin*);
void Com_C_r(LispCom*, LispBuiltin*);
void Com_Cond(LispCom*, LispBuiltin*);
void Com_Cons(LispCom*, LispBuiltin*);
void Com_Consp(LispCom*, LispBuiltin*);
void Com_Dolist(LispCom*, LispBuiltin*);
void Com_Eq(LispCom*, LispBuiltin*);
void Com_Go(LispCom*, LispBuiltin*);
void Com_If(LispCom*, LispBuiltin*);
void Com_Last(LispCom*, LispBuiltin*);
void Com_Length(LispCom*, LispBuiltin*);
void Com_Let(LispCom*, LispBuiltin*);
void Com_Letx(LispCom*, LispBuiltin*);
void Com_Listp(LispCom*, LispBuiltin*);
void Com_Loop(LispCom*, LispBuiltin*);
void Com_Nthcdr(LispCom*, LispBuiltin*);
void Com_Null(LispCom*, LispBuiltin*);
void Com_Numberp(LispCom*, LispBuiltin*);
void Com_Or(LispCom*, LispBuiltin*);
void Com_Progn(LispCom*, LispBuiltin*);
void Com_Return(LispCom*, LispBuiltin*);
void Com_ReturnFrom(LispCom*, LispBuiltin*);
void Com_Rplac_(LispCom*, LispBuiltin*);
void Com_Setq(LispCom*, LispBuiltin*);
void Com_Tagbody(LispCom*, LispBuiltin*);
void Com_Unless(LispCom*, LispBuiltin*);
void Com_Until(LispCom*, LispBuiltin*);
void Com_When(LispCom*, LispBuiltin*);
void Com_While(LispCom*, LispBuiltin*);
#endif /* Lisp_Bytecode_h */
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