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226 lines
7.7 KiB
C
226 lines
7.7 KiB
C
/* Copyright (C) 2000 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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#ifndef VM_H
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#define VM_H
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#include <libguile.h>
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/*
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* Instruction
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*/
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/* Opcode */
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enum scm_opcode {
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#include "vm_system.opcode"
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#include "vm_scheme.opcode"
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#include "vm_number.opcode"
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op_last
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};
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/* Argument type */
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/* Modify `mark_bytecode', `scm_make_bytecode', and `scm_bytecode_decode'! */
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enum scm_inst_type {
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INST_NONE, /* no argument */
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INST_INUM, /* fixed integer */
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INST_SCM, /* scheme object */
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INST_EXT, /* external offset */
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INST_TOP, /* top-level variable */
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INST_CODE, /* program code */
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INST_ADDR /* program address */
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};
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struct scm_instruction {
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enum scm_opcode opcode; /* opcode */
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enum scm_inst_type type; /* argument type */
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char *name; /* instruction name */
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SCM obj; /* instruction object */
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/* fields for VM functions */
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char *sname; /* Scheme procedure name */
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char nargs; /* the number of arguments */
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char restp; /* have a rest argument or not */
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};
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#define SCM_INSTRUCTION_P(OBJ) SCM_SMOB_PREDICATE (scm_instruction_tag, OBJ)
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#define SCM_INSTRUCTION_DATA(INST) ((struct scm_instruction *) SCM_SMOB_DATA (INST))
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#define SCM_VALIDATE_INSTRUCTION(POS,OBJ) SCM_MAKE_VALIDATE (POS, OBJ, INSTRUCTION_P)
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#define SCM_SYSTEM_INSTRUCTION_P(OBJ) \
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(SCM_INSTRUCTION_P (OBJ) && !SCM_INSTRUCTION_DATA(OBJ)->sname)
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#define SCM_FUNCTIONAL_INSTRUCTION_P(OBJ) \
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(SCM_INSTRUCTION_P (OBJ) && SCM_INSTRUCTION_DATA(OBJ)->sname)
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#define SCM_ADDR_TO_CODE(ADDR) SCM_PACK (ADDR)
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#define SCM_CODE_TO_ADDR(CODE) ((void *) SCM_UNPACK (CODE))
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#define SCM_CODE_TO_DEBUG_ADDR(CODE) instruction_code_to_debug_addr (CODE)
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/*
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* Bytecode
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*/
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struct scm_bytecode {
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int size; /* the size of the bytecode */
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char nreqs; /* the number of required arguments */
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char restp; /* have a rest argument or not */
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char nvars; /* the number of local variables */
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char nexts; /* the number of external variables */
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int *exts; /* externalized arguments */
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SCM base[0]; /* base address (must be the last!) */
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};
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#define SCM_BYTECODE_P(OBJ) SCM_SMOB_PREDICATE (scm_bytecode_tag, OBJ)
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#define SCM_BYTECODE_DATA(BC) ((struct scm_bytecode *) SCM_SMOB_DATA (BC))
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#define SCM_VALIDATE_BYTECODE(POS,OBJ) SCM_MAKE_VALIDATE (POS, OBJ, BYTECODE_P)
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#define SCM_BYTECODE_SIZE(BC) SCM_BYTECODE_DATA (BC)->size
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#define SCM_BYTECODE_NREQS(BC) SCM_BYTECODE_DATA (BC)->nreqs
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#define SCM_BYTECODE_RESTP(BC) SCM_BYTECODE_DATA (BC)->restp
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#define SCM_BYTECODE_NVARS(BC) SCM_BYTECODE_DATA (BC)->nvars
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#define SCM_BYTECODE_NEXTS(BC) SCM_BYTECODE_DATA (BC)->nexts
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#define SCM_BYTECODE_EXTS(BC) SCM_BYTECODE_DATA (BC)->exts
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#define SCM_BYTECODE_BASE(BC) SCM_BYTECODE_DATA (BC)->base
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extern SCM scm_bytecode_p (SCM obj);
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extern SCM scm_make_bytecode (SCM code);
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extern SCM scm_bytecode_decode (SCM bytecode);
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/*
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* Program
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*/
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#define SCM_MAKE_PROGRAM(CODE,ENV) make_program (CODE, ENV)
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#define SCM_PROGRAM_P(OBJ) SCM_SMOB_PREDICATE (scm_program_tag, OBJ)
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#define SCM_PROGRAM_CODE(PROG) SCM_CELL_OBJECT_1 (PROG)
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#define SCM_PROGRAM_ENV(PROG) SCM_CELL_OBJECT_2 (PROG)
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#define SCM_VALIDATE_PROGRAM(POS,PROG) SCM_MAKE_VALIDATE (POS, PROG, PROGRAM_P)
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/* Abbreviations */
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#define SCM_PROGRAM_SIZE(PROG) SCM_BYTECODE_SIZE (SCM_PROGRAM_CODE (PROG))
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#define SCM_PROGRAM_NREQS(PROG) SCM_BYTECODE_NREQS (SCM_PROGRAM_CODE (PROG))
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#define SCM_PROGRAM_RESTP(PROG) SCM_BYTECODE_RESTP (SCM_PROGRAM_CODE (PROG))
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#define SCM_PROGRAM_NVARS(PROG) SCM_BYTECODE_NVARS (SCM_PROGRAM_CODE (PROG))
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#define SCM_PROGRAM_NEXTS(PROG) SCM_BYTECODE_NEXTS (SCM_PROGRAM_CODE (PROG))
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#define SCM_PROGRAM_EXTS(PROG) SCM_BYTECODE_EXTS (SCM_PROGRAM_CODE (PROG))
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#define SCM_PROGRAM_BASE(PROG) SCM_BYTECODE_BASE (SCM_PROGRAM_CODE (PROG))
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extern SCM scm_program_p (SCM obj);
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extern SCM scm_make_program (SCM bytecode, SCM env);
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extern SCM scm_program_code (SCM program);
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extern SCM scm_program_base (SCM program);
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/*
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* VM Address
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*/
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#define SCM_VM_MAKE_ADDRESS(ADDR) SCM_MAKINUM ((long) (ADDR))
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#define SCM_VM_ADDRESS(OBJ) ((SCM *) SCM_INUM (OBJ))
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/*
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* VM External
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*/
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/* VM external maintains a set of variables outside of the stack.
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This is used to implement external chain of the environment. */
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#define SCM_VM_MAKE_EXTERNAL(SIZE) scm_make_vector (SCM_MAKINUM ((SIZE) + 1), SCM_UNDEFINED)
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#define SCM_VM_EXTERNAL_LINK(EXT) (SCM_VELTS (EXT)[0])
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#define SCM_VM_EXTERNAL_VARIABLE(EXT,N) (SCM_VELTS (EXT)[(N) + 1])
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/*
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* VM Continuation
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*/
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#define SCM_VM_CONT_P(OBJ) SCM_SMOB_PREDICATE (scm_vm_cont_tag, OBJ)
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#define SCM_VM_CONT_VMP(CONT) ((struct scm_vm *) SCM_CELL_WORD_1 (CONT))
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#define SCM_VM_CAPTURE_CONT(VMP) capture_vm_cont (VMP)
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#define SCM_VM_REINSTATE_CONT(VMP,CONT) reinstate_vm_cont (VMP, CONT)
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/*
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* VM Frame
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*/
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/* VM frame is allocated in the stack */
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/* NOTE: Modify make_vm_frame and VM_NEW_FRAME too! */
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#define SCM_VM_FRAME_DATA_SIZE 6
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#define SCM_VM_FRAME_VARIABLE(FP,N) (FP[N])
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#define SCM_VM_FRAME_SIZE(FP) (FP[-1])
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#define SCM_VM_FRAME_PROGRAM(FP) (FP[-2])
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#define SCM_VM_FRAME_DYNAMIC_LINK(FP) (FP[-3])
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#define SCM_VM_FRAME_EXTERNAL_LINK(FP) (FP[-4])
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#define SCM_VM_FRAME_STACK_POINTER(FP) (FP[-5])
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#define SCM_VM_FRAME_RETURN_ADDRESS(FP) (FP[-6])
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/*
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* VM
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*/
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/* Modify make_vm, mark_vm, and SYNC, too! */
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struct scm_vm {
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SCM ac; /* Accumulator */
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SCM *pc; /* Program counter */
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SCM *sp; /* Stack pointer */
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SCM *fp; /* Frame pointer */
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int stack_size;
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SCM *stack_base;
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SCM *stack_limit;
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SCM options;
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SCM boot_hook, halt_hook, next_hook;
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SCM call_hook, apply_hook, return_hook;
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};
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#define SCM_VM_P(OBJ) SCM_SMOB_PREDICATE (scm_vm_tag, OBJ)
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#define SCM_VM_DATA(VM) ((struct scm_vm *) SCM_SMOB_DATA (VM))
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#define SCM_VALIDATE_VM(POS,OBJ) SCM_MAKE_VALIDATE (POS, OBJ, VM_P)
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/* Engine types */
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#define SCM_VM_REGULAR_ENGINE 0 /* Fail safe and fast enough */
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#define SCM_VM_DEBUG_ENGINE 1 /* Functional but very slow */
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#endif /* not VM_H */
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