src/instructions.h

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41
  42 #ifndef _SCM_INSTRUCTIONS_H_
  43 #define _SCM_INSTRUCTIONS_H_
  44
  45 #include <libguile.h>
  46 #include "config.h"
  47
  48 enum scm_opcode {
  49 #define VM_INSTRUCTION_TO_OPCODE 1
  50 #include "vm_expand.h"
  51 #include "vm_system.i"
  52 #include "vm_scheme.i"
  53 #include "vm_loader.i"
  54 #undef VM_INSTRUCTION_TO_OPCODE
  55   scm_op_last
  56 };
  57
  58 struct scm_instruction {
  59   enum scm_opcode opcode;       /* opcode */
  60   const char *name;             /* instruction name */
  61   signed char len;              /* Instruction length.  This may be -1 for
  62                                    the loader (see the `VM_LOADER'
  63                                    macro).  */
  64   signed char npop;             /* The number of values popped.  This may be
  65                                    -1 for insns like `call' which can take
  66                                    any number of arguments.  */
  67   char npush;                   /* the number of values pushed */
  68 };
  69
  70 #define SCM_INSTRUCTION_P(x)            (scm_lookup_instruction (x))
  71 #define SCM_INSTRUCTION_OPCODE(i)       (scm_lookup_instruction (i)->opcode)
  72 #define SCM_INSTRUCTION_NAME(i)         (scm_lookup_instruction (i)->name)
  73 #define SCM_INSTRUCTION_LENGTH(i)       (scm_lookup_instruction (i)->len)
  74 #define SCM_INSTRUCTION_POPS(i)         (scm_lookup_instruction (i)->npop)
  75 #define SCM_INSTRUCTION_PUSHES(i)       (scm_lookup_instruction (i)->npush)
  76 #define SCM_VALIDATE_INSTRUCTION(p,x)   SCM_MAKE_VALIDATE (p, x, INSTRUCTION_P)
  77
  78 #define SCM_INSTRUCTION(i)              (&scm_instruction_table[i])
  79
  80 extern struct scm_instruction scm_instruction_table[];
  81 extern struct scm_instruction *scm_lookup_instruction (SCM name);
  82
  83 extern void scm_init_instructions (void);
  84
  85 #endif /* _SCM_INSTRUCTIONS_H_ */
  86
  87 /*
  88   Local Variables:
  89   c-file-style: "gnu"
  90   End:
  91 */