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some tweaks to the vm

This commit is contained in:
JeffBezanson 2009-04-22 23:00:13 +00:00
parent 27120b0ce4
commit e4488bb065
1 changed files with 39 additions and 45 deletions
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84
femtolisp/flisp.c
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@ -798,50 +798,49 @@ static value_t apply_cl(uint32_t nargs)
nargs = i+1;
break;
case OP_LET:
ip++;
// last arg is closure environment to use
nargs--;
Stack[SP-2] = Stack[SP-1];
POPN(1);
pvals = &Stack[SP-1];
break;
ip++;
// last arg is closure environment to use
nargs--;
Stack[SP-2] = Stack[SP-1];
POPN(1);
pvals = &Stack[SP-1];
break;
case OP_NOP: break;
case OP_DUP: v = Stack[SP-1]; PUSH(v); break;
case OP_POP: POPN(1); break;
case OP_TCALL:
case OP_CALL:
i = code[ip++]; // nargs
n = code[ip++]; // nargs
do_call:
s = SP;
func = Stack[SP-i-1];
func = Stack[SP-n-1];
if (isfunction(func)) {
if (op == OP_TCALL) {
for(s=-1; s < (fixnum_t)i; s++)
Stack[bp+s] = Stack[SP-i+s];
SP = bp+i;
nargs = i;
for(s=-1; s < (fixnum_t)n; s++)
Stack[bp+s] = Stack[SP-n+s];
SP = bp+n;
nargs = n;
goto apply_cl_top;
}
else {
v = apply_cl(i);
v = apply_cl(n);
}
}
else if (isbuiltinish(func)) {
op = uintval(func);
if (op > N_BUILTINS) {
v = ((builtin_t)ptr(func))(&Stack[SP-i], i);
v = ((builtin_t)ptr(func))(&Stack[SP-n], n);
}
else {
s = builtin_arg_counts[op];
if (s >= 0)
argcount(builtin_names[op], i, s);
else if (s != ANYARGS && (signed)i < -s)
argcount(builtin_names[op], i, -s);
argcount(builtin_names[op], n, s);
else if (s != ANYARGS && (signed)n < -s)
argcount(builtin_names[op], n, -s);
// remove function arg
for(s=SP-i-1; s < (int)SP-1; s++)
for(s=SP-n-1; s < (int)SP-1; s++)
Stack[s] = Stack[s+1];
SP--;
n = i;
switch (op) {
case OP_LIST: goto apply_list;
case OP_ADD: goto apply_add;
@ -857,7 +856,7 @@ static value_t apply_cl(uint32_t nargs)
else {
type_error("apply", "function", func);
}
SP = s-i-1;
SP = s-n-1;
PUSH(v);
break;
case OP_JMP: ip = (uint32_t)*(uint16_t*)&code[ip]; break;
@ -953,12 +952,14 @@ static value_t apply_cl(uint32_t nargs)
Stack[SP-2] = tagptr(c, TAG_CONS);
POPN(1); break;
case OP_CAR:
c = tocons(Stack[SP-1], "car");
Stack[SP-1] = c->car;
v = Stack[SP-1];
if (!iscons(v)) type_error("car", "cons", v);
Stack[SP-1] = car_(v);
break;
case OP_CDR:
c = tocons(Stack[SP-1], "cdr");
Stack[SP-1] = c->cdr;
v = Stack[SP-1];
if (!iscons(v)) type_error("cdr", "cons", v);
Stack[SP-1] = cdr_(v);
break;
case OP_SETCAR:
car(Stack[SP-2]) = Stack[SP-1];
@ -967,29 +968,31 @@ static value_t apply_cl(uint32_t nargs)
cdr(Stack[SP-2]) = Stack[SP-1];
POPN(1); break;
case OP_LIST:
i = code[ip++];
n = code[ip++];
apply_list:
if (i > 0)
v = list(&Stack[SP-i], i);
else
v = NIL;
POPN(i);
PUSH(v);
if (n > 0) {
v = list(&Stack[SP-n], n);
POPN(n);
PUSH(v);
}
else {
PUSH(NIL);
}
break;
case OP_TAPPLY:
case OP_APPLY:
v = POP(); // arglist
i = SP;
n = SP;
while (iscons(v)) {
if (SP-i == MAX_ARGS) {
if (SP-n == MAX_ARGS) {
PUSH(v);
break;
}
PUSH(car_(v));
v = cdr_(v);
}
i = SP-i;
n = SP-n;
if (op==OP_TAPPLY) op = OP_TCALL;
goto do_call;
@ -1278,16 +1281,7 @@ static value_t apply_cl(uint32_t nargs)
case OP_SETC:
s = code[ip++];
i = code[ip++];
if (captured) {
if (nargs > 0) {
// current frame has been captured
s++;
}
v = Stack[bp];
}
else {
v = Stack[bp+nargs];
}
v = Stack[bp+nargs];
while (s--)
v = vector_elt(v, vector_size(v)-1);
assert(isvector(v));