/* Copyright (C) 2001 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this software; see the file COPYING. If not, write to * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, * Boston, MA 02111-1307 USA * * As a special exception, the Free Software Foundation gives permission * for additional uses of the text contained in its release of GUILE. * * The exception is that, if you link the GUILE library with other files * to produce an executable, this does not by itself cause the * resulting executable to be covered by the GNU General Public License. * Your use of that executable is in no way restricted on account of * linking the GUILE library code into it. * * This exception does not however invalidate any other reasons why * the executable file might be covered by the GNU General Public License. * * This exception applies only to the code released by the * Free Software Foundation under the name GUILE. If you copy * code from other Free Software Foundation releases into a copy of * GUILE, as the General Public License permits, the exception does * not apply to the code that you add in this way. To avoid misleading * anyone as to the status of such modified files, you must delete * this exception notice from them. * * If you write modifications of your own for GUILE, it is your choice * whether to permit this exception to apply to your modifications. * If you do not wish that, delete this exception notice. */ /* This file is included in vm_engine.c */ /* * Basic operations */ /* This must be the first instruction! */ VM_DEFINE_INSTRUCTION (nop, "nop", 0, 0, 0) { NEXT; } VM_DEFINE_INSTRUCTION (halt, "halt", 0, 0, 0) { SCM ret = *sp; vp->time += scm_c_get_internal_run_time () - start_time; HALT_HOOK (); FREE_FRAME (); SYNC_ALL (); return ret; } VM_DEFINE_INSTRUCTION (drop, "drop", 0, 0, 0) { DROP (); NEXT; } VM_DEFINE_INSTRUCTION (mark, "mark", 0, 0, 1) { PUSH (SCM_UNDEFINED); NEXT; } VM_DEFINE_INSTRUCTION (dup, "dup", 0, 0, 1) { SCM x = *sp; PUSH (x); NEXT; } /* * Object creation */ VM_DEFINE_INSTRUCTION (void, "void", 0, 0, 1) { PUSH (SCM_UNSPECIFIED); NEXT; } VM_DEFINE_INSTRUCTION (make_true, "make-true", 0, 0, 1) { PUSH (SCM_BOOL_T); NEXT; } VM_DEFINE_INSTRUCTION (make_false, "make-false", 0, 0, 1) { PUSH (SCM_BOOL_F); NEXT; } VM_DEFINE_INSTRUCTION (make_eol, "make-eol", 0, 0, 1) { PUSH (SCM_EOL); NEXT; } VM_DEFINE_INSTRUCTION (make_int8, "make-int8", 1, 0, 1) { PUSH (SCM_MAKINUM ((signed char) FETCH ())); NEXT; } VM_DEFINE_INSTRUCTION (make_int8_0, "make-int8:0", 0, 0, 1) { PUSH (SCM_MAKINUM (0)); NEXT; } VM_DEFINE_INSTRUCTION (make_int8_1, "make-int8:1", 0, 0, 1) { PUSH (SCM_MAKINUM (1)); NEXT; } VM_DEFINE_INSTRUCTION (make_int16, "make-int16", 2, 0, 1) { int h = FETCH (); int l = FETCH (); PUSH (SCM_MAKINUM ((signed short) (h << 8) + l)); NEXT; } VM_DEFINE_INSTRUCTION (make_char8, "make-char8", 1, 0, 1) { PUSH (SCM_MAKE_CHAR (FETCH ())); NEXT; } VM_DEFINE_INSTRUCTION (list, "list", 1, -1, 1) { int n = FETCH (); POP_LIST (n); NEXT; } VM_DEFINE_INSTRUCTION (vector, "vector", 1, -1, 1) { int n = FETCH (); POP_LIST (n); *sp = scm_vector (*sp); NEXT; } VM_DEFINE_INSTRUCTION (list_mark, "list-mark", 0, 0, 0) { POP_LIST_MARK (); NEXT; } VM_DEFINE_INSTRUCTION (vector_mark, "vector-mark", 0, 0, 0) { POP_LIST_MARK (); *sp = scm_vector (*sp); NEXT; } VM_DEFINE_INSTRUCTION (list_break, "list-break", 0, 0, 0) { SCM l; POP (l); for (; !SCM_NULLP (l); l = SCM_CDR (l)) PUSH (SCM_CAR (l)); NEXT; } /* * Variable access */ #define OBJECT_REF(i) objects[i] #define OBJECT_SET(i,o) objects[i] = o #define LOCAL_REF(i) SCM_VM_FRAME_VARIABLE (fp, i) #define LOCAL_SET(i,o) SCM_VM_FRAME_VARIABLE (fp, i) = o #define VARIABLE_REF(v) SCM_CDR (v) #define VARIABLE_SET(v,o) SCM_SETCDR (v, o) /* ref */ VM_DEFINE_INSTRUCTION (object_ref, "object-ref", 1, 0, 1) { PUSH (OBJECT_REF (FETCH ())); NEXT; } VM_DEFINE_INSTRUCTION (local_ref, "local-ref", 1, 0, 1) { PUSH (LOCAL_REF (FETCH ())); NEXT; } VM_DEFINE_INSTRUCTION (external_ref, "external-ref", 1, 0, 1) { unsigned int i; SCM e = external; for (i = FETCH (); i; i--) { CHECK_EXTERNAL(e); e = SCM_CDR (e); } CHECK_EXTERNAL(e); PUSH (SCM_CAR (e)); NEXT; } VM_DEFINE_INSTRUCTION (variable_ref, "variable-ref", 0, 0, 1) { SCM x = *sp; SCM o = VARIABLE_REF (x); if (SCM_UNBNDP (o)) { err_args = SCM_LIST1 (SCM_CAR (x)); goto vm_error_unbound; } *sp = o; NEXT; } /* set */ VM_DEFINE_INSTRUCTION (local_set, "local-set", 1, 1, 0) { LOCAL_SET (FETCH (), *sp); DROP (); NEXT; } VM_DEFINE_INSTRUCTION (external_set, "external-set", 1, 1, 0) { unsigned int i; SCM e = external; for (i = FETCH (); i; i--) e = SCM_CDR (e); SCM_SETCAR (e, *sp); DROP (); NEXT; } VM_DEFINE_INSTRUCTION (variable_set, "variable-set", 0, 1, 0) { VARIABLE_SET (sp[0], sp[-1]); scm_set_object_property_x (sp[-1], scm_sym_name, SCM_CAR (sp[0])); sp -= 2; NEXT; } /* * branch and jump */ #define BR(p) \ { \ int h = FETCH (); \ int l = FETCH (); \ signed short offset = (h << 8) + l; \ if (p) \ ip += offset; \ DROP (); \ NEXT; \ } VM_DEFINE_INSTRUCTION (br, "br", 2, 0, 0) { int h = FETCH (); int l = FETCH (); ip += (signed short) (h << 8) + l; NEXT; } VM_DEFINE_INSTRUCTION (br_if, "br-if", 2, 0, 0) { BR (!SCM_FALSEP (*sp)); } VM_DEFINE_INSTRUCTION (br_if_not, "br-if-not", 2, 0, 0) { BR (SCM_FALSEP (*sp)); } VM_DEFINE_INSTRUCTION (br_if_eq, "br-if-eq", 2, 0, 0) { BR (SCM_EQ_P (sp[0], sp--[1])); } VM_DEFINE_INSTRUCTION (br_if_not_eq, "br-if-not-eq", 2, 0, 0) { BR (!SCM_EQ_P (sp[0], sp--[1])); } VM_DEFINE_INSTRUCTION (br_if_null, "br-if-null", 2, 0, 0) { BR (SCM_NULLP (*sp)); } VM_DEFINE_INSTRUCTION (br_if_not_null, "br-if-not-null", 2, 0, 0) { BR (!SCM_NULLP (*sp)); } /* * Subprogram call */ VM_DEFINE_INSTRUCTION (make_closure, "make-closure", 0, 1, 1) { SYNC_BEFORE_GC (); *sp = scm_c_make_closure (*sp, external); NEXT; } VM_DEFINE_INSTRUCTION (call, "call", 1, -1, 1) { SCM x; nargs = FETCH (); vm_call: x = sp[-nargs]; /* * Subprogram call */ if (SCM_PROGRAM_P (x)) { program = x; vm_call_program: CACHE_PROGRAM (); INIT_ARGS (); NEW_FRAME (); ENTER_HOOK (); APPLY_HOOK (); NEXT; } /* * Function call */ if (!SCM_FALSEP (scm_procedure_p (x))) { SCM args; POP_LIST (nargs); POP (args); *sp = scm_apply (x, args, SCM_EOL); NEXT; } /* * Continuation call */ if (SCM_VM_CONT_P (x)) { vm_call_cc: /* Check the number of arguments */ if (nargs != 1) scm_wrong_num_args (x); /* Reinstate the continuation */ EXIT_HOOK (); reinstate_vm_cont (vp, x); CACHE_REGISTER (); program = SCM_VM_FRAME_PROGRAM (fp); CACHE_PROGRAM (); NEXT; } program = x; goto vm_error_wrong_type_apply; } VM_DEFINE_INSTRUCTION (tail_call, "tail-call", 1, -1, 1) { SCM x; nargs = FETCH (); x = sp[-nargs]; SCM_TICK; /* allow interrupt here */ /* * Tail recursive call */ if (SCM_EQ_P (x, program)) { int i; /* Move arguments */ INIT_ARGS (); sp -= bp->nargs - 1; for (i = 0; i < bp->nargs; i++) LOCAL_SET (i, sp[i]); sp--; /* Call itself */ ip = bp->base; APPLY_HOOK (); NEXT; } /* * Proper tail call */ if (SCM_PROGRAM_P (x)) { SCM *limit = sp; SCM *base = sp - nargs - 1; /* Exit the current frame */ EXIT_HOOK (); FREE_FRAME (); /* Move arguments */ while (base < limit) *++sp = *++base; /* Call the program */ program = x; goto vm_call_program; } /* * Function call */ if (!SCM_FALSEP (scm_procedure_p (x))) { SCM args; POP_LIST (nargs); POP (args); *sp = scm_apply (x, args, SCM_EOL); goto vm_return; } /* * Continuation call */ if (SCM_VM_CONT_P (x)) goto vm_call_cc; program = x; goto vm_error_wrong_type_apply; } VM_DEFINE_INSTRUCTION (apply, "apply", 1, -1, 1) { int len; SCM ls; POP (ls); nargs = FETCH (); if (nargs < 2) goto vm_error_wrong_num_args; len = scm_ilength (ls); if (len < 0) goto vm_error_wrong_type_arg; for (; !SCM_NULLP (ls); ls = SCM_CDR (ls)) PUSH (SCM_CAR (ls)); nargs += len - 2; goto vm_call; } VM_DEFINE_INSTRUCTION (call_cc, "call/cc", 1, 1, 1) { SYNC_BEFORE_GC (); PUSH (capture_vm_cont (vp)); POP (program); nargs = 1; goto vm_call; } VM_DEFINE_INSTRUCTION (return, "return", 0, 0, 1) { SCM ret; vm_return: ret = *sp; EXIT_HOOK (); RETURN_HOOK (); FREE_FRAME (); /* Restore the last program */ program = SCM_VM_FRAME_PROGRAM (fp); CACHE_PROGRAM (); external = fp[bp->nargs + bp->nlocs]; PUSH (ret); NEXT; } /* Local Variables: c-file-style: "gnu" End: */