-/* Copyright (C) 2001,2008,2009 Free Software Foundation, Inc.
+/* Copyright (C) 2001,2008,2009,2010,2011,2012,2013 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
VM_DEFINE_INSTRUCTION (1, halt, "halt", 0, 0, 0)
{
- vp->time += scm_c_get_internal_run_time () - start_time;
- HALT_HOOK ();
- nvalues = SCM_I_INUM (*sp--);
+ SCM ret;
+ SCM nvalues_scm;
+
+ nvalues_scm = *sp--; /* SCM_I_INUM may evaluate its argument
+ more than once. */
+ nvalues = SCM_I_INUM (nvalues_scm);
NULLSTACK (1);
+
if (nvalues == 1)
- POP (finish_args);
+ POP (ret);
else
{
- POP_LIST (nvalues);
- POP (finish_args);
SYNC_REGISTER ();
- finish_args = scm_values (finish_args);
+ sp -= nvalues;
+ CHECK_UNDERFLOW ();
+ ret = scm_c_values (sp + 1, nvalues);
+ NULLSTACK (nvalues);
}
{
NULLSTACK (old_sp - sp);
}
- goto vm_done;
-}
-
-VM_DEFINE_INSTRUCTION (2, break, "break", 0, 0, 0)
-{
- BREAK_HOOK ();
- NEXT;
+ SYNC_ALL ();
+ return ret;
}
-VM_DEFINE_INSTRUCTION (3, drop, "drop", 0, 1, 0)
+VM_DEFINE_INSTRUCTION (2, drop, "drop", 0, 1, 0)
{
DROP ();
NEXT;
}
-VM_DEFINE_INSTRUCTION (4, dup, "dup", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (3, dup, "dup", 0, 0, 1)
{
SCM x = *sp;
PUSH (x);
* Object creation
*/
-VM_DEFINE_INSTRUCTION (5, void, "void", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (4, void, "void", 0, 0, 1)
{
PUSH (SCM_UNSPECIFIED);
NEXT;
}
-VM_DEFINE_INSTRUCTION (6, make_true, "make-true", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (5, make_true, "make-true", 0, 0, 1)
{
PUSH (SCM_BOOL_T);
NEXT;
}
-VM_DEFINE_INSTRUCTION (7, make_false, "make-false", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (6, make_false, "make-false", 0, 0, 1)
{
PUSH (SCM_BOOL_F);
NEXT;
}
+VM_DEFINE_INSTRUCTION (7, make_nil, "make-nil", 0, 0, 1)
+{
+ PUSH (SCM_ELISP_NIL);
+ NEXT;
+}
+
VM_DEFINE_INSTRUCTION (8, make_eol, "make-eol", 0, 0, 1)
{
PUSH (SCM_EOL);
nothing more than the corresponding macros. */
#define VARIABLE_REF(v) SCM_VARIABLE_REF (v)
#define VARIABLE_SET(v,o) SCM_VARIABLE_SET (v, o)
-#define VARIABLE_BOUNDP(v) (VARIABLE_REF (v) != SCM_UNDEFINED)
+#define VARIABLE_BOUNDP(v) (!scm_is_eq (VARIABLE_REF (v), SCM_UNDEFINED))
-#define FREE_VARIABLE_REF(i) free_vars[i]
+#define FREE_VARIABLE_REF(i) SCM_PROGRAM_FREE_VARIABLE_REF (program, i)
/* ref */
VM_DEFINE_INSTRUCTION (23, local_bound, "local-bound?", 1, 0, 1)
{
- if (LOCAL_REF (FETCH ()) == SCM_UNDEFINED)
- PUSH (SCM_BOOL_F);
- else
- PUSH (SCM_BOOL_T);
+ PUSH (scm_from_bool (!scm_is_eq (LOCAL_REF (FETCH ()), SCM_UNDEFINED)));
NEXT;
}
unsigned int i = FETCH ();
i <<= 8;
i += FETCH ();
- if (LOCAL_REF (i) == SCM_UNDEFINED)
- PUSH (SCM_BOOL_F);
- else
- PUSH (SCM_BOOL_T);
+ PUSH (scm_from_bool (!scm_is_eq (LOCAL_REF (i), SCM_UNDEFINED)));
NEXT;
}
-VM_DEFINE_INSTRUCTION (25, variable_ref, "variable-ref", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (25, variable_ref, "variable-ref", 0, 1, 1)
{
SCM x = *sp;
- if (!VARIABLE_BOUNDP (x))
+ /* We don't use ASSERT_VARIABLE or ASSERT_BOUND_VARIABLE here because,
+ unlike in top-variable-ref, it really isn't an internal assertion
+ that can be optimized out -- the variable could be coming directly
+ from the user. */
+ VM_ASSERT (SCM_VARIABLEP (x),
+ vm_error_not_a_variable ("variable-ref", x));
+
+ if (SCM_UNLIKELY (!VARIABLE_BOUNDP (x)))
{
- finish_args = scm_list_1 (x);
- /* Was: finish_args = SCM_LIST1 (SCM_CAR (x)); */
- goto vm_error_unbound;
+ SCM var_name;
+
+ SYNC_ALL ();
+ /* Attempt to provide the variable name in the error message. */
+ var_name = scm_module_reverse_lookup (scm_current_module (), x);
+ vm_error_unbound (program, scm_is_true (var_name) ? var_name : x);
}
else
{
NEXT;
}
-VM_DEFINE_INSTRUCTION (26, variable_bound, "variable-bound?", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (26, variable_bound, "variable-bound?", 0, 1, 1)
{
- if (VARIABLE_BOUNDP (*sp))
- *sp = SCM_BOOL_T;
- else
- *sp = SCM_BOOL_F;
+ SCM x = *sp;
+
+ VM_ASSERT (SCM_VARIABLEP (x),
+ vm_error_not_a_variable ("variable-bound?", x));
+
+ *sp = scm_from_bool (VARIABLE_BOUNDP (x));
NEXT;
}
VM_DEFINE_INSTRUCTION (27, toplevel_ref, "toplevel-ref", 1, 0, 1)
{
unsigned objnum = FETCH ();
- SCM what;
+ SCM what, resolved;
CHECK_OBJECT (objnum);
what = OBJECT_REF (objnum);
- if (!SCM_VARIABLEP (what))
+ if (!SCM_VARIABLEP (what))
{
SYNC_REGISTER ();
- what = resolve_variable (what, scm_program_module (program));
- if (!VARIABLE_BOUNDP (what))
- {
- finish_args = scm_list_1 (what);
- goto vm_error_unbound;
- }
+ resolved = resolve_variable (what, scm_program_module (program));
+ VM_ASSERT (VARIABLE_BOUNDP (resolved), vm_error_unbound (program, what));
+ what = resolved;
OBJECT_SET (objnum, what);
}
VM_DEFINE_INSTRUCTION (28, long_toplevel_ref, "long-toplevel-ref", 2, 0, 1)
{
- SCM what;
+ SCM what, resolved;
unsigned int objnum = FETCH ();
objnum <<= 8;
objnum += FETCH ();
CHECK_OBJECT (objnum);
what = OBJECT_REF (objnum);
- if (!SCM_VARIABLEP (what))
+ if (!SCM_VARIABLEP (what))
{
SYNC_REGISTER ();
- what = resolve_variable (what, scm_program_module (program));
- if (!VARIABLE_BOUNDP (what))
- {
- finish_args = scm_list_1 (what);
- goto vm_error_unbound;
- }
+ resolved = resolve_variable (what, scm_program_module (program));
+ VM_ASSERT (VARIABLE_BOUNDP (resolved),
+ vm_error_unbound (program, what));
+ what = resolved;
OBJECT_SET (objnum, what);
}
VM_DEFINE_INSTRUCTION (29, local_set, "local-set", 1, 1, 0)
{
- LOCAL_SET (FETCH (), *sp);
- DROP ();
+ SCM x;
+ POP (x);
+ LOCAL_SET (FETCH (), x);
NEXT;
}
VM_DEFINE_INSTRUCTION (30, long_local_set, "long-local-set", 2, 1, 0)
{
+ SCM x;
unsigned int i = FETCH ();
i <<= 8;
i += FETCH ();
- LOCAL_SET (i, *sp);
- DROP ();
+ POP (x);
+ LOCAL_SET (i, x);
NEXT;
}
-VM_DEFINE_INSTRUCTION (31, variable_set, "variable-set", 0, 1, 0)
+VM_DEFINE_INSTRUCTION (31, variable_set, "variable-set", 0, 2, 0)
{
+ VM_ASSERT (SCM_VARIABLEP (sp[0]),
+ vm_error_not_a_variable ("variable-set!", sp[0]));
VARIABLE_SET (sp[0], sp[-1]);
DROPN (2);
NEXT;
offset -= (offset & (1<<23)) << 1; \
}
-#define BR(p) \
+#define BR(p) \
{ \
scm_t_int32 offset; \
FETCH_OFFSET (offset); \
if (p) \
ip += offset; \
- NULLSTACK (1); \
- DROP (); \
+ if (offset < 0) \
+ VM_HANDLE_INTERRUPTS; \
NEXT; \
}
scm_t_int32 offset;
FETCH_OFFSET (offset);
ip += offset;
+ if (offset < 0)
+ VM_HANDLE_INTERRUPTS;
NEXT;
}
VM_DEFINE_INSTRUCTION (35, br_if, "br-if", 3, 0, 0)
{
- BR (scm_is_true_and_not_nil (*sp));
+ SCM x;
+ POP (x);
+ BR (scm_is_true (x));
}
VM_DEFINE_INSTRUCTION (36, br_if_not, "br-if-not", 3, 0, 0)
{
- BR (scm_is_false_or_nil (*sp));
+ SCM x;
+ POP (x);
+ BR (scm_is_false (x));
}
VM_DEFINE_INSTRUCTION (37, br_if_eq, "br-if-eq", 3, 0, 0)
{
- sp--; /* underflow? */
- BR (scm_is_eq (sp[0], sp[1]));
+ SCM x, y;
+ POP2 (y, x);
+ BR (scm_is_eq (x, y));
}
VM_DEFINE_INSTRUCTION (38, br_if_not_eq, "br-if-not-eq", 3, 0, 0)
{
- sp--; /* underflow? */
- BR (!scm_is_eq (sp[0], sp[1]));
+ SCM x, y;
+ POP2 (y, x);
+ BR (!scm_is_eq (x, y));
}
VM_DEFINE_INSTRUCTION (39, br_if_null, "br-if-null", 3, 0, 0)
{
- BR (scm_is_null_or_nil (*sp));
+ SCM x;
+ POP (x);
+ BR (scm_is_null (x));
}
VM_DEFINE_INSTRUCTION (40, br_if_not_null, "br-if-not-null", 3, 0, 0)
{
- BR (!scm_is_null_or_nil (*sp));
+ SCM x;
+ POP (x);
+ BR (!scm_is_null (x));
}
\f
scm_t_ptrdiff n;
n = FETCH () << 8;
n += FETCH ();
- if (sp - (fp - 1) != n)
- goto vm_error_wrong_num_args;
+ VM_ASSERT (sp - (fp - 1) == n,
+ vm_error_wrong_num_args (program));
NEXT;
}
scm_t_ptrdiff n;
n = FETCH () << 8;
n += FETCH ();
- if (sp - (fp - 1) < n)
- goto vm_error_wrong_num_args;
+ VM_ASSERT (sp - (fp - 1) >= n,
+ vm_error_wrong_num_args (program));
NEXT;
}
NEXT;
}
+/* See also bind-optionals/shuffle-or-br below. */
+
/* Flags that determine whether other keywords are allowed, and whether a
rest argument is expected. These values must match those used by the
glil->assembly compiler. */
nkw += FETCH ();
kw_and_rest_flags = FETCH ();
- if (!(kw_and_rest_flags & F_REST)
- && ((sp - (fp - 1) - nkw) % 2))
- goto vm_error_kwargs_length_not_even;
+ VM_ASSERT ((kw_and_rest_flags & F_REST)
+ || ((sp - (fp - 1) - nkw) % 2) == 0,
+ vm_error_kwargs_length_not_even (program))
CHECK_OBJECT (idx);
kw = OBJECT_REF (idx);
break;
}
}
- if (!(kw_and_rest_flags & F_ALLOW_OTHER_KEYS) && !scm_is_pair (walk))
- goto vm_error_kwargs_unrecognized_keyword;
-
+ VM_ASSERT (scm_is_pair (walk)
+ || (kw_and_rest_flags & F_ALLOW_OTHER_KEYS),
+ vm_error_kwargs_unrecognized_keyword (program, sp[nkw]));
nkw++;
}
- else if (!(kw_and_rest_flags & F_REST))
- goto vm_error_kwargs_invalid_keyword;
+ else
+ VM_ASSERT (kw_and_rest_flags & F_REST,
+ vm_error_kwargs_invalid_keyword (program, sp[nkw]));
}
NEXT;
{
/* NB: if you change this, see frames.c:vm-frame-num-locals */
/* and frames.h, vm-engine.c, etc of course */
- PUSH ((SCM)fp); /* dynamic link */
- PUSH (0); /* mvra */
- PUSH (0); /* ra */
+
+ /* We don't initialize the dynamic link here because we don't actually
+ know that this frame will point to the current fp: it could be
+ placed elsewhere on the stack if captured in a partial
+ continuation, and invoked from some other context. */
+ PUSH (SCM_PACK (0)); /* dynamic link */
+ PUSH (SCM_PACK (0)); /* mvra */
+ PUSH (SCM_PACK (0)); /* ra */
NEXT;
}
VM_DEFINE_INSTRUCTION (53, call, "call", 1, -1, 1)
{
- SCM x;
nargs = FETCH ();
vm_call:
- x = sp[-nargs];
+ VM_HANDLE_INTERRUPTS;
+
+ {
+ SCM *old_fp = fp;
+
+ fp = sp - nargs + 1;
+
+ ASSERT (SCM_FRAME_DYNAMIC_LINK (fp) == 0);
+ ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
+ ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
+ SCM_FRAME_SET_DYNAMIC_LINK (fp, old_fp);
+ SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
+ SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, 0);
+ }
+
+ PUSH_CONTINUATION_HOOK ();
+
+ program = fp[-1];
+
+ if (SCM_UNLIKELY (!SCM_PROGRAM_P (program)))
+ goto apply;
+
+ CACHE_PROGRAM ();
+ ip = SCM_C_OBJCODE_BASE (bp);
+
+ APPLY_HOOK ();
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (54, tail_call, "tail-call", 1, -1, 1)
+{
+ nargs = FETCH ();
+
+ vm_tail_call:
+ VM_HANDLE_INTERRUPTS;
+
+ {
+ int i;
+#ifdef VM_ENABLE_STACK_NULLING
+ SCM *old_sp = sp;
+ CHECK_STACK_LEAK ();
+#endif
+
+ /* shuffle down the program and the arguments */
+ for (i = -1, sp = sp - nargs + 1; i < nargs; i++)
+ SCM_FRAME_STACK_ADDRESS (fp)[i] = sp[i];
+
+ sp = fp + i - 1;
+
+ NULLSTACK (old_sp - sp);
+ }
+
+ program = fp[-1];
+
+ if (SCM_UNLIKELY (!SCM_PROGRAM_P (program)))
+ goto apply;
+ CACHE_PROGRAM ();
+ ip = SCM_C_OBJCODE_BASE (bp);
+
+ APPLY_HOOK ();
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (55, subr_call, "subr-call", 1, -1, -1)
+{
+ SCM pointer, ret;
+ SCM (*subr)();
+
+ nargs = FETCH ();
+ POP (pointer);
+
+ subr = SCM_POINTER_VALUE (pointer);
+
+ VM_HANDLE_INTERRUPTS;
SYNC_REGISTER ();
- SCM_TICK; /* allow interrupt here */
- /*
- * Subprogram call
- */
- if (SCM_PROGRAM_P (x))
+ switch (nargs)
{
- program = x;
- CACHE_PROGRAM ();
- fp = sp - nargs + 1;
- ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
- ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
- SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
- SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, 0);
- ip = bp->base;
- ENTER_HOOK ();
- APPLY_HOOK ();
- NEXT;
+ case 0:
+ ret = subr ();
+ break;
+ case 1:
+ ret = subr (sp[0]);
+ break;
+ case 2:
+ ret = subr (sp[-1], sp[0]);
+ break;
+ case 3:
+ ret = subr (sp[-2], sp[-1], sp[0]);
+ break;
+ case 4:
+ ret = subr (sp[-3], sp[-2], sp[-1], sp[0]);
+ break;
+ case 5:
+ ret = subr (sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
+ break;
+ case 6:
+ ret = subr (sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
+ break;
+ case 7:
+ ret = subr (sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
+ break;
+ case 8:
+ ret = subr (sp[-7], sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
+ break;
+ case 9:
+ ret = subr (sp[-8], sp[-7], sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
+ break;
+ case 10:
+ ret = subr (sp[-9], sp[-8], sp[-7], sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
+ break;
+ default:
+ abort ();
}
- if (SCM_STRUCTP (x) && SCM_STRUCT_APPLICABLE_P (x))
+
+ NULLSTACK_FOR_NONLOCAL_EXIT ();
+
+ if (SCM_UNLIKELY (SCM_VALUESP (ret)))
{
- sp[-nargs] = SCM_STRUCT_PROCEDURE (x);
- goto vm_call;
+ /* multiple values returned to continuation */
+ ret = scm_struct_ref (ret, SCM_INUM0);
+ nvalues = scm_ilength (ret);
+ PUSH_LIST (ret, scm_is_null);
+ goto vm_return_values;
}
- /*
- * Other interpreted or compiled call
- */
- if (!scm_is_false (scm_procedure_p (x)))
+ else
{
- SCM args;
- /* At this point, the stack contains the frame, the procedure and each one
- of its arguments. */
- POP_LIST (nargs);
- POP (args);
- DROP (); /* drop the procedure */
- DROP_FRAME ();
-
- SYNC_REGISTER ();
- PUSH (scm_apply (x, args, SCM_EOL));
- NULLSTACK_FOR_NONLOCAL_EXIT ();
- if (SCM_UNLIKELY (SCM_VALUESP (*sp)))
- {
- /* truncate values */
- SCM values;
- POP (values);
- values = scm_struct_ref (values, SCM_INUM0);
- if (scm_is_null (values))
- goto vm_error_not_enough_values;
- PUSH (SCM_CAR (values));
- }
- NEXT;
+ PUSH (ret);
+ goto vm_return;
}
-
- program = x;
- goto vm_error_wrong_type_apply;
}
-VM_DEFINE_INSTRUCTION (54, goto_args, "goto/args", 1, -1, 1)
+VM_DEFINE_INSTRUCTION (56, smob_call, "smob-call", 1, -1, -1)
{
- register SCM x;
+ SCM smob, ret;
+ SCM (*subr)();
nargs = FETCH ();
- vm_goto_args:
- x = sp[-nargs];
+ POP (smob);
+
+ subr = SCM_SMOB_DESCRIPTOR (smob).apply;
+ VM_HANDLE_INTERRUPTS;
SYNC_REGISTER ();
- SCM_TICK; /* allow interrupt here */
- /*
- * Tail call
- */
- if (SCM_PROGRAM_P (x))
+ switch (nargs)
{
- int i;
-#ifdef VM_ENABLE_STACK_NULLING
- SCM *old_sp = sp;
- CHECK_STACK_LEAK ();
-#endif
-
- EXIT_HOOK ();
-
- /* switch programs */
- program = x;
- CACHE_PROGRAM ();
- /* shuffle down the program and the arguments */
- for (i = -1, sp = sp - nargs + 1; i < nargs; i++)
- SCM_FRAME_STACK_ADDRESS (fp)[i] = sp[i];
+ case 0:
+ ret = subr (smob);
+ break;
+ case 1:
+ ret = subr (smob, sp[0]);
+ break;
+ case 2:
+ ret = subr (smob, sp[-1], sp[0]);
+ break;
+ case 3:
+ ret = subr (smob, sp[-2], sp[-1], sp[0]);
+ break;
+ default:
+ abort ();
+ }
+
+ NULLSTACK_FOR_NONLOCAL_EXIT ();
+
+ if (SCM_UNLIKELY (SCM_VALUESP (ret)))
+ {
+ /* multiple values returned to continuation */
+ ret = scm_struct_ref (ret, SCM_INUM0);
+ nvalues = scm_ilength (ret);
+ PUSH_LIST (ret, scm_is_null);
+ goto vm_return_values;
+ }
+ else
+ {
+ PUSH (ret);
+ goto vm_return;
+ }
+}
- sp = fp + i - 1;
+VM_DEFINE_INSTRUCTION (57, foreign_call, "foreign-call", 1, -1, -1)
+{
+ SCM foreign, ret;
+ nargs = FETCH ();
+ POP (foreign);
- NULLSTACK (old_sp - sp);
+ VM_HANDLE_INTERRUPTS;
+ SYNC_REGISTER ();
- ip = bp->base;
+ ret = scm_i_foreign_call (foreign, sp - nargs + 1);
- ENTER_HOOK ();
- APPLY_HOOK ();
- NEXT;
+ NULLSTACK_FOR_NONLOCAL_EXIT ();
+
+ if (SCM_UNLIKELY (SCM_VALUESP (ret)))
+ {
+ /* multiple values returned to continuation */
+ ret = scm_struct_ref (ret, SCM_INUM0);
+ nvalues = scm_ilength (ret);
+ PUSH_LIST (ret, scm_is_null);
+ goto vm_return_values;
}
- if (SCM_STRUCTP (x) && SCM_STRUCT_APPLICABLE_P (x))
+ else
{
- sp[-nargs] = SCM_STRUCT_PROCEDURE (x);
- goto vm_goto_args;
+ PUSH (ret);
+ goto vm_return;
}
+}
- /*
- * Other interpreted or compiled call
- */
- if (!scm_is_false (scm_procedure_p (x)))
- {
- SCM args;
- POP_LIST (nargs);
- POP (args);
+VM_DEFINE_INSTRUCTION (58, continuation_call, "continuation-call", 0, -1, 0)
+{
+ SCM contregs;
+ POP (contregs);
- SYNC_REGISTER ();
- *sp = scm_apply (x, args, SCM_EOL);
- NULLSTACK_FOR_NONLOCAL_EXIT ();
-
- if (SCM_UNLIKELY (SCM_VALUESP (*sp)))
- {
- /* multiple values returned to continuation */
- SCM values;
- POP (values);
- values = scm_struct_ref (values, SCM_INUM0);
- nvalues = scm_ilength (values);
- PUSH_LIST (values, scm_is_null);
- goto vm_return_values;
- }
- else
- goto vm_return;
- }
+ SYNC_ALL ();
+ scm_i_check_continuation (contregs);
+ vm_return_to_continuation (scm_i_contregs_vm (contregs),
+ scm_i_contregs_vm_cont (contregs),
+ sp - (fp - 1), fp);
+ scm_i_reinstate_continuation (contregs);
- program = x;
+ /* no NEXT */
+ abort ();
+}
+
+VM_DEFINE_INSTRUCTION (59, partial_cont_call, "partial-cont-call", 0, -1, 0)
+{
+ SCM vmcont, intwinds, prevwinds;
+ POP2 (intwinds, vmcont);
+ SYNC_REGISTER ();
+ VM_ASSERT (SCM_VM_CONT_REWINDABLE_P (vmcont),
+ vm_error_continuation_not_rewindable (vmcont));
+ prevwinds = scm_i_dynwinds ();
+ vm_reinstate_partial_continuation (vm, vmcont, intwinds, sp + 1 - fp, fp,
+ vm_cookie);
- goto vm_error_wrong_type_apply;
+ /* Rewind prompt jmpbuffers, if any. */
+ {
+ SCM winds = scm_i_dynwinds ();
+ for (; !scm_is_eq (winds, prevwinds); winds = scm_cdr (winds))
+ if (SCM_PROMPT_P (scm_car (winds)) && SCM_PROMPT_SETJMP (scm_car (winds)))
+ break;
+ }
+
+ CACHE_REGISTER ();
+ program = SCM_FRAME_PROGRAM (fp);
+ CACHE_PROGRAM ();
+ NEXT;
}
-VM_DEFINE_INSTRUCTION (55, goto_nargs, "goto/nargs", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (60, tail_call_nargs, "tail-call/nargs", 0, 0, 1)
{
SCM x;
POP (x);
nargs = scm_to_int (x);
/* FIXME: should truncate values? */
- goto vm_goto_args;
+ goto vm_tail_call;
}
-VM_DEFINE_INSTRUCTION (56, call_nargs, "call/nargs", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (61, call_nargs, "call/nargs", 0, 0, 1)
{
SCM x;
POP (x);
goto vm_call;
}
-VM_DEFINE_INSTRUCTION (57, mv_call, "mv-call", 4, -1, 1)
+VM_DEFINE_INSTRUCTION (62, mv_call, "mv-call", 4, -1, 1)
{
- SCM x;
scm_t_int32 offset;
scm_t_uint8 *mvra;
+ SCM *old_fp = fp;
nargs = FETCH ();
FETCH_OFFSET (offset);
mvra = ip + offset;
- vm_mv_call:
- x = sp[-nargs];
+ VM_HANDLE_INTERRUPTS;
- /*
- * Subprogram call
- */
- if (SCM_PROGRAM_P (x))
- {
- program = x;
- CACHE_PROGRAM ();
- fp = sp - nargs + 1;
- ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
- ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
- SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
- SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, mvra);
- ip = bp->base;
- ENTER_HOOK ();
- APPLY_HOOK ();
- NEXT;
- }
- if (SCM_STRUCTP (x) && SCM_STRUCT_APPLICABLE_P (x))
- {
- sp[-nargs] = SCM_STRUCT_PROCEDURE (x);
- goto vm_mv_call;
- }
- /*
- * Other interpreted or compiled call
- */
- if (!scm_is_false (scm_procedure_p (x)))
- {
- SCM args;
- /* At this point, the stack contains the procedure and each one of its
- arguments. */
- POP_LIST (nargs);
- POP (args);
- DROP (); /* drop the procedure */
- DROP_FRAME ();
-
- SYNC_REGISTER ();
- PUSH (scm_apply (x, args, SCM_EOL));
- NULLSTACK_FOR_NONLOCAL_EXIT ();
- if (SCM_VALUESP (*sp))
- {
- SCM values, len;
- POP (values);
- values = scm_struct_ref (values, SCM_INUM0);
- len = scm_length (values);
- PUSH_LIST (values, scm_is_null);
- PUSH (len);
- ip = mvra;
- }
- NEXT;
- }
+ fp = sp - nargs + 1;
+
+ ASSERT (SCM_FRAME_DYNAMIC_LINK (fp) == 0);
+ ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
+ ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
+ SCM_FRAME_SET_DYNAMIC_LINK (fp, old_fp);
+ SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
+ SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, mvra);
+
+ PUSH_CONTINUATION_HOOK ();
+
+ program = fp[-1];
- program = x;
- goto vm_error_wrong_type_apply;
+ if (SCM_UNLIKELY (!SCM_PROGRAM_P (program)))
+ goto apply;
+
+ CACHE_PROGRAM ();
+ ip = SCM_C_OBJCODE_BASE (bp);
+
+ APPLY_HOOK ();
+ NEXT;
}
-VM_DEFINE_INSTRUCTION (58, apply, "apply", 1, -1, 1)
+VM_DEFINE_INSTRUCTION (63, apply, "apply", 1, -1, 1)
{
int len;
SCM ls;
ASSERT (nargs >= 2);
len = scm_ilength (ls);
- if (len < 0)
- goto vm_error_wrong_type_arg;
-
+ VM_ASSERT (len >= 0,
+ vm_error_apply_to_non_list (ls));
PUSH_LIST (ls, SCM_NULL_OR_NIL_P);
nargs += len - 2;
goto vm_call;
}
-VM_DEFINE_INSTRUCTION (59, goto_apply, "goto/apply", 1, -1, 1)
+VM_DEFINE_INSTRUCTION (64, tail_apply, "tail-apply", 1, -1, 1)
{
int len;
SCM ls;
ASSERT (nargs >= 2);
len = scm_ilength (ls);
- if (len < 0)
- goto vm_error_wrong_type_arg;
-
+ VM_ASSERT (len >= 0,
+ vm_error_apply_to_non_list (ls));
PUSH_LIST (ls, SCM_NULL_OR_NIL_P);
nargs += len - 2;
- goto vm_goto_args;
+ goto vm_tail_call;
}
-VM_DEFINE_INSTRUCTION (60, call_cc, "call/cc", 0, 1, 1)
+VM_DEFINE_INSTRUCTION (65, call_cc, "call/cc", 0, 1, 1)
{
int first;
- SCM proc, cont;
+ SCM proc, vm_cont, cont;
POP (proc);
SYNC_ALL ();
- cont = scm_make_continuation (&first);
+ vm_cont = scm_i_vm_capture_stack (vp->stack_base, fp, sp, ip, NULL, 0);
+ cont = scm_i_make_continuation (&first, vm, vm_cont);
if (first)
{
- PUSH ((SCM)fp); /* dynamic link */
- PUSH (0); /* mvra */
- PUSH (0); /* ra */
+ PUSH (SCM_PACK (0)); /* dynamic link */
+ PUSH (SCM_PACK (0)); /* mvra */
+ PUSH (SCM_PACK (0)); /* ra */
PUSH (proc);
PUSH (cont);
nargs = 1;
goto vm_call;
}
- ASSERT (sp == vp->sp);
- ASSERT (fp == vp->fp);
- else if (SCM_VALUESP (cont))
- {
- /* multiple values returned to continuation */
- SCM values;
- values = scm_struct_ref (cont, SCM_INUM0);
- if (scm_is_null (values))
- goto vm_error_no_values;
- /* non-tail context does not accept multiple values? */
- PUSH (SCM_CAR (values));
- NEXT;
- }
- else
+ else
{
- PUSH (cont);
+ /* Otherwise, the vm continuation was reinstated, and
+ vm_return_to_continuation pushed on one value. We know only one
+ value was returned because we are in value context -- the
+ previous block jumped to vm_call, not vm_mv_call, after all.
+
+ So, pull our regs back down from the vp, and march on to the
+ next instruction. */
+ CACHE_REGISTER ();
+ program = SCM_FRAME_PROGRAM (fp);
+ CACHE_PROGRAM ();
+ RESTORE_CONTINUATION_HOOK ();
NEXT;
}
}
-VM_DEFINE_INSTRUCTION (61, goto_cc, "goto/cc", 0, 1, 1)
+VM_DEFINE_INSTRUCTION (66, tail_call_cc, "tail-call/cc", 0, 1, 1)
{
int first;
- SCM proc, cont;
+ SCM proc, vm_cont, cont;
POP (proc);
SYNC_ALL ();
- cont = scm_make_continuation (&first);
- ASSERT (sp == vp->sp);
- ASSERT (fp == vp->fp);
+ /* In contrast to call/cc, tail-call/cc captures the continuation without the
+ stack frame. */
+ vm_cont = scm_i_vm_capture_stack (vp->stack_base,
+ SCM_FRAME_DYNAMIC_LINK (fp),
+ SCM_FRAME_LOWER_ADDRESS (fp) - 1,
+ SCM_FRAME_RETURN_ADDRESS (fp),
+ SCM_FRAME_MV_RETURN_ADDRESS (fp),
+ 0);
+ cont = scm_i_make_continuation (&first, vm, vm_cont);
if (first)
{
PUSH (proc);
PUSH (cont);
nargs = 1;
- goto vm_goto_args;
- }
- else if (SCM_VALUESP (cont))
- {
- /* multiple values returned to continuation */
- SCM values;
- values = scm_struct_ref (cont, SCM_INUM0);
- nvalues = scm_ilength (values);
- PUSH_LIST (values, scm_is_null);
- goto vm_return_values;
+ goto vm_tail_call;
}
else
{
- PUSH (cont);
- goto vm_return;
+ /* Otherwise, cache regs and NEXT, as above. Invoking the continuation
+ does a return from the frame, either to the RA or
+ MVRA. */
+ CACHE_REGISTER ();
+ program = SCM_FRAME_PROGRAM (fp);
+ CACHE_PROGRAM ();
+ /* Unfortunately we don't know whether we are at the RA, and thus
+ have one value without an nvalues marker, or we are at the
+ MVRA and thus have multiple values and the nvalues
+ marker. Instead of adding heuristics here, we will let hook
+ client code do that. */
+ RESTORE_CONTINUATION_HOOK ();
+ NEXT;
}
}
-VM_DEFINE_INSTRUCTION (62, return, "return", 0, 1, 1)
+VM_DEFINE_INSTRUCTION (67, return, "return", 0, 1, 1)
{
vm_return:
- EXIT_HOOK ();
- RETURN_HOOK ();
- SYNC_REGISTER ();
- SCM_TICK; /* allow interrupt here */
+ POP_CONTINUATION_HOOK (1);
+
+ VM_HANDLE_INTERRUPTS;
+
{
SCM ret;
NEXT;
}
-VM_DEFINE_INSTRUCTION (63, return_values, "return/values", 1, -1, -1)
+VM_DEFINE_INSTRUCTION (68, return_values, "return/values", 1, -1, -1)
{
/* nvalues declared at top level, because for some reason gcc seems to think
that perhaps it might be used without declaration. Fooey to that, I say. */
nvalues = FETCH ();
vm_return_values:
- EXIT_HOOK ();
- RETURN_HOOK ();
+ POP_CONTINUATION_HOOK (nvalues);
+
+ VM_HANDLE_INTERRUPTS;
if (nvalues != 1 && SCM_FRAME_MV_RETURN_ADDRESS (fp))
{
NULLSTACK (vals + nvalues - sp);
}
else
- goto vm_error_no_values;
+ {
+ SYNC_ALL ();
+ vm_error_no_values ();
+ }
/* Restore the last program */
program = SCM_FRAME_PROGRAM (fp);
NEXT;
}
-VM_DEFINE_INSTRUCTION (64, return_values_star, "return/values*", 1, -1, -1)
+VM_DEFINE_INSTRUCTION (69, return_values_star, "return/values*", 1, -1, -1)
{
SCM l;
l = SCM_CDR (l);
nvalues++;
}
- if (SCM_UNLIKELY (!SCM_NULL_OR_NIL_P (l))) {
- finish_args = scm_list_1 (l);
- goto vm_error_improper_list;
- }
+ VM_ASSERT (SCM_NULL_OR_NIL_P (l), vm_error_improper_list (l));
+
+ goto vm_return_values;
+}
+VM_DEFINE_INSTRUCTION (70, return_nvalues, "return/nvalues", 0, 1, -1)
+{
+ SCM n;
+ POP (n);
+ nvalues = scm_to_int (n);
+ ASSERT (nvalues >= 0);
goto vm_return_values;
}
-VM_DEFINE_INSTRUCTION (65, truncate_values, "truncate-values", 2, -1, -1)
+VM_DEFINE_INSTRUCTION (71, truncate_values, "truncate-values", 2, -1, -1)
{
SCM x;
int nbinds, rest;
if (rest)
nbinds--;
- if (nvalues < nbinds)
- goto vm_error_not_enough_values;
+ VM_ASSERT (nvalues >= nbinds, vm_error_not_enough_values ());
if (rest)
POP_LIST (nvalues - nbinds);
NEXT;
}
-VM_DEFINE_INSTRUCTION (66, box, "box", 1, 1, 0)
+VM_DEFINE_INSTRUCTION (72, box, "box", 1, 1, 0)
{
SCM val;
POP (val);
(set! a (lambda () (b ...)))
...)
*/
-VM_DEFINE_INSTRUCTION (67, empty_box, "empty-box", 1, 0, 0)
+VM_DEFINE_INSTRUCTION (73, empty_box, "empty-box", 1, 0, 0)
{
SYNC_BEFORE_GC ();
LOCAL_SET (FETCH (),
NEXT;
}
-VM_DEFINE_INSTRUCTION (68, local_boxed_ref, "local-boxed-ref", 1, 0, 1)
+VM_DEFINE_INSTRUCTION (74, local_boxed_ref, "local-boxed-ref", 1, 0, 1)
{
SCM v = LOCAL_REF (FETCH ());
ASSERT_BOUND_VARIABLE (v);
NEXT;
}
-VM_DEFINE_INSTRUCTION (69, local_boxed_set, "local-boxed-set", 1, 1, 0)
+VM_DEFINE_INSTRUCTION (75, local_boxed_set, "local-boxed-set", 1, 1, 0)
{
SCM v, val;
v = LOCAL_REF (FETCH ());
NEXT;
}
-VM_DEFINE_INSTRUCTION (70, free_ref, "free-ref", 1, 0, 1)
+VM_DEFINE_INSTRUCTION (76, free_ref, "free-ref", 1, 0, 1)
{
scm_t_uint8 idx = FETCH ();
/* no free-set -- if a var is assigned, it should be in a box */
-VM_DEFINE_INSTRUCTION (71, free_boxed_ref, "free-boxed-ref", 1, 0, 1)
+VM_DEFINE_INSTRUCTION (77, free_boxed_ref, "free-boxed-ref", 1, 0, 1)
{
SCM v;
scm_t_uint8 idx = FETCH ();
NEXT;
}
-VM_DEFINE_INSTRUCTION (72, free_boxed_set, "free-boxed-set", 1, 1, 0)
+VM_DEFINE_INSTRUCTION (78, free_boxed_set, "free-boxed-set", 1, 1, 0)
{
SCM v, val;
scm_t_uint8 idx = FETCH ();
NEXT;
}
-VM_DEFINE_INSTRUCTION (73, make_closure, "make-closure", 0, 2, 1)
+VM_DEFINE_INSTRUCTION (79, make_closure, "make-closure", 2, -1, 1)
{
- SCM vect;
- POP (vect);
+ size_t n, len;
+ SCM closure;
+
+ len = FETCH ();
+ len <<= 8;
+ len += FETCH ();
SYNC_BEFORE_GC ();
- /* fixme underflow */
- *sp = scm_double_cell (scm_tc7_program, (scm_t_bits)SCM_PROGRAM_OBJCODE (*sp),
- (scm_t_bits)SCM_PROGRAM_OBJTABLE (*sp), (scm_t_bits)vect);
+ closure = scm_words (scm_tc7_program | (len<<16), len + 3);
+ SCM_SET_CELL_OBJECT_1 (closure, SCM_PROGRAM_OBJCODE (sp[-len]));
+ SCM_SET_CELL_OBJECT_2 (closure, SCM_PROGRAM_OBJTABLE (sp[-len]));
+ sp[-len] = closure;
+ for (n = 0; n < len; n++)
+ SCM_PROGRAM_FREE_VARIABLE_SET (closure, n, sp[-len + 1 + n]);
+ DROPN (len);
NEXT;
}
-VM_DEFINE_INSTRUCTION (74, make_variable, "make-variable", 0, 0, 1)
+VM_DEFINE_INSTRUCTION (80, make_variable, "make-variable", 0, 0, 1)
{
SYNC_BEFORE_GC ();
/* fixme underflow */
NEXT;
}
-VM_DEFINE_INSTRUCTION (75, fix_closure, "fix-closure", 2, 0, 1)
+VM_DEFINE_INSTRUCTION (81, fix_closure, "fix-closure", 2, -1, 0)
{
- SCM x, vect;
+ SCM x;
unsigned int i = FETCH ();
+ size_t n, len;
i <<= 8;
i += FETCH ();
- POP (vect);
/* FIXME CHECK_LOCAL (i) */
x = LOCAL_REF (i);
/* FIXME ASSERT_PROGRAM (x); */
- SCM_SET_CELL_WORD_3 (x, vect);
+ len = SCM_PROGRAM_NUM_FREE_VARIABLES (x);
+ for (n = 0; n < len; n++)
+ SCM_PROGRAM_FREE_VARIABLE_SET (x, n, sp[-len + 1 + n]);
+ DROPN (len);
NEXT;
}
-VM_DEFINE_INSTRUCTION (76, define, "define", 0, 0, 2)
+VM_DEFINE_INSTRUCTION (82, define, "define", 0, 0, 2)
{
SCM sym, val;
- POP (sym);
- POP (val);
+ POP2 (sym, val);
SYNC_REGISTER ();
- VARIABLE_SET (scm_sym2var (sym, scm_current_module_lookup_closure (),
- SCM_BOOL_T),
- val);
+ scm_define (sym, val);
NEXT;
}
-VM_DEFINE_INSTRUCTION (77, make_keyword, "make-keyword", 0, 1, 1)
+VM_DEFINE_INSTRUCTION (83, make_keyword, "make-keyword", 0, 1, 1)
{
CHECK_UNDERFLOW ();
SYNC_REGISTER ();
NEXT;
}
-VM_DEFINE_INSTRUCTION (78, make_symbol, "make-symbol", 0, 1, 1)
+VM_DEFINE_INSTRUCTION (84, make_symbol, "make-symbol", 0, 1, 1)
{
CHECK_UNDERFLOW ();
SYNC_REGISTER ();
NEXT;
}
+VM_DEFINE_INSTRUCTION (85, prompt, "prompt", 4, 2, 0)
+{
+ scm_t_int32 offset;
+ scm_t_uint8 escape_only_p;
+ SCM k, prompt;
+
+ escape_only_p = FETCH ();
+ FETCH_OFFSET (offset);
+ POP (k);
+
+ SYNC_REGISTER ();
+ /* Push the prompt onto the dynamic stack. */
+ prompt = scm_c_make_prompt (k, fp, sp, ip + offset, escape_only_p, vm_cookie,
+ scm_i_dynwinds ());
+ scm_i_set_dynwinds (scm_cons (prompt, SCM_PROMPT_DYNWINDS (prompt)));
+ if (SCM_PROMPT_SETJMP (prompt))
+ {
+ /* The prompt exited nonlocally. Cache the regs back from the vp, and go
+ to the handler.
+
+ Note, at this point, we must assume that any variable local to
+ vm_engine that can be assigned *has* been assigned. So we need to pull
+ all our state back from the ip/fp/sp.
+ */
+ CACHE_REGISTER ();
+ program = SCM_FRAME_PROGRAM (fp);
+ CACHE_PROGRAM ();
+ /* The stack contains the values returned to this prompt, along
+ with a number-of-values marker -- like an MV return. */
+ ABORT_CONTINUATION_HOOK ();
+ NEXT;
+ }
+
+ /* Otherwise setjmp returned for the first time, so we go to execute the
+ prompt's body. */
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (86, wind, "wind", 0, 2, 0)
+{
+ SCM wind, unwind;
+ POP2 (unwind, wind);
+ SYNC_REGISTER ();
+ /* Push wind and unwind procedures onto the dynamic stack. Note that neither
+ are actually called; the compiler should emit calls to wind and unwind for
+ the normal dynamic-wind control flow. */
+ VM_ASSERT (scm_to_bool (scm_thunk_p (wind)),
+ vm_error_not_a_thunk ("dynamic-wind", wind));
+ VM_ASSERT (scm_to_bool (scm_thunk_p (unwind)),
+ vm_error_not_a_thunk ("dynamic-wind", unwind));
+ scm_i_set_dynwinds (scm_cons (scm_cons (wind, unwind), scm_i_dynwinds ()));
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (87, abort, "abort", 1, -1, -1)
+{
+ unsigned n = FETCH ();
+ SYNC_REGISTER ();
+ PRE_CHECK_UNDERFLOW (n + 2);
+ vm_abort (vm, n, vm_cookie);
+ /* vm_abort should not return */
+ abort ();
+}
+
+VM_DEFINE_INSTRUCTION (88, unwind, "unwind", 0, 0, 0)
+{
+ /* A normal exit from the dynamic extent of an expression. Pop the top entry
+ off of the dynamic stack. */
+ scm_i_set_dynwinds (scm_cdr (scm_i_dynwinds ()));
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (89, wind_fluids, "wind-fluids", 1, -1, 0)
+{
+ unsigned n = FETCH ();
+ SCM wf;
+
+ SYNC_REGISTER ();
+ sp -= 2 * n;
+ CHECK_UNDERFLOW ();
+ wf = scm_i_make_with_fluids (n, sp + 1, sp + 1 + n);
+ NULLSTACK (2 * n);
+
+ scm_i_swap_with_fluids (wf, current_thread->dynamic_state);
+ scm_i_set_dynwinds (scm_cons (wf, scm_i_dynwinds ()));
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (90, unwind_fluids, "unwind-fluids", 0, 0, 0)
+{
+ SCM wf;
+ wf = scm_car (scm_i_dynwinds ());
+ scm_i_set_dynwinds (scm_cdr (scm_i_dynwinds ()));
+ scm_i_swap_with_fluids (wf, current_thread->dynamic_state);
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (91, fluid_ref, "fluid-ref", 0, 1, 1)
+{
+ size_t num;
+ SCM fluids;
+
+ CHECK_UNDERFLOW ();
+ fluids = SCM_I_DYNAMIC_STATE_FLUIDS (current_thread->dynamic_state);
+ if (SCM_UNLIKELY (!SCM_FLUID_P (*sp))
+ || ((num = SCM_I_FLUID_NUM (*sp)) >= SCM_SIMPLE_VECTOR_LENGTH (fluids)))
+ {
+ /* Punt dynstate expansion and error handling to the C proc. */
+ SYNC_REGISTER ();
+ *sp = scm_fluid_ref (*sp);
+ }
+ else
+ {
+ SCM val = SCM_SIMPLE_VECTOR_REF (fluids, num);
+ if (scm_is_eq (val, SCM_UNDEFINED))
+ val = SCM_I_FLUID_DEFAULT (*sp);
+ VM_ASSERT (!scm_is_eq (val, SCM_UNDEFINED),
+ vm_error_unbound_fluid (program, *sp));
+ *sp = val;
+ }
+
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (92, fluid_set, "fluid-set", 0, 2, 0)
+{
+ size_t num;
+ SCM val, fluid, fluids;
+
+ POP2 (val, fluid);
+ fluids = SCM_I_DYNAMIC_STATE_FLUIDS (current_thread->dynamic_state);
+ if (SCM_UNLIKELY (!SCM_FLUID_P (fluid))
+ || ((num = SCM_I_FLUID_NUM (fluid)) >= SCM_SIMPLE_VECTOR_LENGTH (fluids)))
+ {
+ /* Punt dynstate expansion and error handling to the C proc. */
+ SYNC_REGISTER ();
+ scm_fluid_set_x (fluid, val);
+ }
+ else
+ SCM_SIMPLE_VECTOR_SET (fluids, num, val);
+
+ NEXT;
+}
+
+VM_DEFINE_INSTRUCTION (93, assert_nargs_ee_locals, "assert-nargs-ee/locals", 1, 0, 0)
+{
+ scm_t_ptrdiff n;
+ SCM *old_sp;
+
+ /* nargs = n & 0x7, nlocs = nargs + (n >> 3) */
+ n = FETCH ();
+
+ VM_ASSERT (sp - (fp - 1) == (n & 0x7),
+ vm_error_wrong_num_args (program));
+
+ old_sp = sp;
+ sp += (n >> 3);
+ CHECK_OVERFLOW ();
+ while (old_sp < sp)
+ *++old_sp = SCM_UNDEFINED;
+
+ NEXT;
+}
+
+/* Like bind-optionals/shuffle, but if there are too many positional
+ arguments, jumps to the next case-lambda clause. */
+VM_DEFINE_INSTRUCTION (94, bind_optionals_shuffle_or_br, "bind-optionals/shuffle-or-br", 9, -1, -1)
+{
+ SCM *walk;
+ scm_t_ptrdiff nreq, nreq_and_opt, ntotal;
+ scm_t_int32 offset;
+ nreq = FETCH () << 8;
+ nreq += FETCH ();
+ nreq_and_opt = FETCH () << 8;
+ nreq_and_opt += FETCH ();
+ ntotal = FETCH () << 8;
+ ntotal += FETCH ();
+ FETCH_OFFSET (offset);
+
+ /* look in optionals for first keyword or last positional */
+ /* starting after the last required positional arg */
+ walk = fp + nreq;
+ while (/* while we have args */
+ walk <= sp
+ /* and we still have positionals to fill */
+ && walk - fp < nreq_and_opt
+ /* and we haven't reached a keyword yet */
+ && !scm_is_keyword (*walk))
+ /* bind this optional arg (by leaving it in place) */
+ walk++;
+ if (/* If we have filled all the positionals */
+ walk - fp == nreq_and_opt
+ /* and there are still more arguments */
+ && walk <= sp
+ /* and the next argument is not a keyword, */
+ && !scm_is_keyword (*walk))
+ {
+ /* Jump to the next case-lambda* clause. */
+ ip += offset;
+ }
+ else
+ {
+ /* Otherwise, finish as in bind-optionals/shuffle: shuffle up,
+ from walk to ntotal */
+ scm_t_ptrdiff nshuf = sp - walk + 1, i;
+ sp = (fp - 1) + ntotal + nshuf;
+ CHECK_OVERFLOW ();
+ for (i = 0; i < nshuf; i++)
+ sp[-i] = walk[nshuf-i-1];
+
+ /* and fill optionals & keyword args with SCM_UNDEFINED */
+ while (walk <= (fp - 1) + ntotal)
+ *walk++ = SCM_UNDEFINED;
+ }
+
+ NEXT;
+}
+
/*
(defun renumber-ops ()
(replace-match
(number-to-string (setq counter (1+ counter)))
t t nil 1)))))
+(renumber-ops)
*/
/*
Local Variables:
HCoop / bpt / guile.git / blobdiff