static bool hash_entry_deleted_p(struct hash_entry_t * entry)
{
return UNBOUND_MARKER_P(entry->key) && NULLP(entry->val);
}
static lref_t execute_fast_op(lref_t fop, lref_t env)
{
lref_t retval = NIL;
lref_t sym;
lref_t binding;
lref_t fn;
lref_t args;
size_t argc;
lref_t argv[ARG_BUF_LEN];
lref_t after;
lref_t tag;
lref_t cell;
lref_t escape_retval;
jmp_buf *jmpbuf;
STACK_CHECK(&fop);
_process_interrupts();
fstack_enter_eval_frame(&fop, fop, env);
while(!NULLP(fop)) {
switch(fop->header.opcode)
{
case FOP_LITERAL:
retval = fop->as.fast_op.arg1;
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_REF:
sym = fop->as.fast_op.arg1;
binding = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(binding))
vmerror_unbound(sym);
retval = binding;
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_SET:
sym = fop->as.fast_op.arg1;
binding = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(binding))
vmerror_unbound(sym);
SET_SYMBOL_VCELL(sym, retval);
fop = fop->as.fast_op.next;
break;
case FOP_APPLY_GLOBAL:
sym = fop->as.fast_op.arg1;
fn = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(fn))
vmerror_unbound(sym);
argc = 0;
args = fop->as.fast_op.arg2;
while (CONSP(args)) {
if (argc >= ARG_BUF_LEN) {
vmerror_unsupported(_T("too many actual arguments"));
break;
}
argv[argc] = execute_fast_op(CAR(args), env);
args = CDR(args);
argc++;
}
if (!NULLP(args))
vmerror_arg_out_of_range(fop->as.fast_op.arg2,
_T("bad formal argument list"));
fop = apply(fn, argc, argv, &env, &retval);
break;
case FOP_APPLY:
argc = 0;
fn = execute_fast_op(fop->as.fast_op.arg1, env);
args = fop->as.fast_op.arg2;
while (CONSP(args)) {
if (argc >= ARG_BUF_LEN) {
vmerror_unsupported(_T("too many actual arguments"));
break;
}
argv[argc] = execute_fast_op(CAR(args), env);
args = CDR(args);
argc++;
}
if (!NULLP(args))
vmerror_arg_out_of_range(fop->as.fast_op.arg2,
_T("bad formal argument list"));
fop = apply(fn, argc, argv, &env, &retval);
break;
case FOP_IF_TRUE:
if (TRUEP(retval))
fop = fop->as.fast_op.arg1;
else
fop = fop->as.fast_op.arg2;
break;
case FOP_RETVAL:
fop = fop->as.fast_op.next;
break;
case FOP_SEQUENCE:
retval = execute_fast_op(fop->as.fast_op.arg1, env);
fop = fop->as.fast_op.arg2;
break;
case FOP_THROW:
tag = execute_fast_op(fop->as.fast_op.arg1, env);
escape_retval = execute_fast_op(fop->as.fast_op.arg2, env);
dscwritef(DF_SHOW_THROWS, (_T("; DEBUG: throw ~a, retval = ~a\n"), tag, escape_retval));
CURRENT_TIB()->escape_frame = find_matching_escape(CURRENT_TIB()->frame, tag);
CURRENT_TIB()->escape_value = escape_retval;
if (CURRENT_TIB()->escape_frame == NULL) {
/* If we don't find a matching catch for the throw, we have a
* problem and need to invoke a trap. */
vmtrap(TRAP_UNCAUGHT_THROW,
(enum vmt_options_t)(VMT_MANDATORY_TRAP | VMT_HANDLER_MUST_ESCAPE),
2, tag, escape_retval);
}
unwind_stack_for_throw();
fop = fop->as.fast_op.next;
break;
case FOP_CATCH:
tag = execute_fast_op(fop->as.fast_op.arg1, env);
jmpbuf = fstack_enter_catch_frame(tag, CURRENT_TIB()->frame);
dscwritef(DF_SHOW_THROWS, (_T("; DEBUG: setjmp tag: ~a, frame: ~c&, jmpbuf: ~c&\n"), tag, CURRENT_TIB()->frame, jmpbuf));
if (setjmp(*jmpbuf) == 0) {
retval = execute_fast_op(fop->as.fast_op.arg2, env);
} else {
dscwritef(DF_SHOW_THROWS, (_T("; DEBUG: catch, retval = ~a\n"), CURRENT_TIB()->escape_value));
retval = CURRENT_TIB()->escape_value;
CURRENT_TIB()->escape_value = NIL;
}
fstack_leave_frame();
fop = fop->as.fast_op.next;
break;
case FOP_WITH_UNWIND_FN:
fstack_enter_unwind_frame(execute_fast_op(fop->as.fast_op.arg1, env));
retval = execute_fast_op(fop->as.fast_op.arg2, env);
after = CURRENT_TIB()->frame[FOFS_UNWIND_AFTER];
fstack_leave_frame();
apply1(after, 0, NULL);
fop = fop->as.fast_op.next;
break;
case FOP_CLOSURE:
retval = lclosurecons(env,
lcons(lcar(fop->as.fast_op.arg1),
fop->as.fast_op.arg2),
lcdr(fop->as.fast_op.arg1));
fop = fop->as.fast_op.next;
break;
case FOP_CAR:
retval = lcar(retval);
fop = fop->as.fast_op.next;
break;
case FOP_CDR:
retval = lcdr(retval);
fop = fop->as.fast_op.next;
break;
case FOP_NOT:
retval = boolcons(!TRUEP(retval));
fop = fop->as.fast_op.next;
break;
case FOP_NULLP:
retval = boolcons(NULLP(retval));
fop = fop->as.fast_op.next;
break;
case FOP_EQP:
retval = boolcons(EQ(execute_fast_op(fop->as.fast_op.arg1, env),
execute_fast_op(fop->as.fast_op.arg2, env)));
fop = fop->as.fast_op.next;
break;
case FOP_GET_ENV:
retval = env;
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_DEF: // three args, third was genv, but currently unused
retval = lidefine_global(fop->as.fast_op.arg1, fop->as.fast_op.arg2);
fop = fop->as.fast_op.next;
break;
case FOP_GET_FSP:
retval = fixcons((fixnum_t)CURRENT_TIB()->fsp);
fop = fop->as.fast_op.next;
break;
case FOP_GET_FRAME:
retval = fixcons((fixnum_t)CURRENT_TIB()->frame);
fop = fop->as.fast_op.next;
break;
case FOP_GET_HFRAMES:
retval = CURRENT_TIB()->handler_frames;
fop = fop->as.fast_op.next;
break;
case FOP_SET_HFRAMES:
CURRENT_TIB()->handler_frames = execute_fast_op(fop->as.fast_op.arg1, env);
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_PRESERVE_FRAME:
sym = fop->as.fast_op.arg1;
binding = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(binding))
vmerror_unbound(sym);
SET_SYMBOL_VCELL(sym, fixcons((fixnum_t)CURRENT_TIB()->frame));
retval = execute_fast_op(fop->as.fast_op.arg2, env);
fop = fop->as.fast_op.next;
break;
case FOP_STACK_BOUNDARY:
sym = execute_fast_op(fop->as.fast_op.arg1, env);
fstack_enter_boundary_frame(sym);
retval = execute_fast_op(fop->as.fast_op.arg2, env);
fstack_leave_frame();
fop = fop->as.fast_op.next;
break;
case FOP_FAST_ENQUEUE_CELL:
retval = execute_fast_op(fop->as.fast_op.arg2, env);
cell = execute_fast_op(fop->as.fast_op.arg1, env);
SET_CDR(CAR(retval), cell);
SET_CAR(retval, cell);
fop = fop->as.fast_op.next;
break;
case FOP_WHILE_TRUE:
while(TRUEP(execute_fast_op(fop->as.fast_op.arg1, env))) {
retval = execute_fast_op(fop->as.fast_op.arg2, env);
}
fop = fop->as.fast_op.next;
break;
case FOP_LOCAL_REF_BY_INDEX:
retval = lenvlookup_by_index(FIXNM(fop->as.fast_op.arg1),
FIXNM(fop->as.fast_op.arg2),
env);
fop = fop->as.fast_op.next;
break;
case FOP_LOCAL_REF_RESTARG:
retval = lenvlookup_restarg_by_index(FIXNM(fop->as.fast_op.arg1),
FIXNM(fop->as.fast_op.arg2),
env);
fop = fop->as.fast_op.next;
break;
case FOP_LOCAL_SET_BY_INDEX:
lenvlookup_set_by_index(FIXNM(fop->as.fast_op.arg1),
FIXNM(fop->as.fast_op.arg2),
env,
retval);
fop = fop->as.fast_op.next;
break;
default:
panic("Unsupported fast-op");
}
}
fstack_leave_frame();
return retval;
}
static bool hash_entry_unused_p(struct hash_entry_t * entry)
{
return UNBOUND_MARKER_P(entry->key);
}