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Use floating-point math for division

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Justin Ethier 2016-04-05 01:42:32 -04:00
parent b1ab82a9f8
commit e451d1d606
1 changed files with 52 additions and 1 deletions
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53
runtime.c
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@ -1787,10 +1787,61 @@ void FUNC_APPLY(void *data, int argc, object clo, object cont, object n, ...) {
return_closcall1(data, cont, result); \
}
object Cyc_div_op(void *data, common_type *x, object y) {
int tx = type_of(x), ty = (obj_is_int(y) ? -1 : type_of(y));
if (1 &&
((ty == -1 && (obj_obj2int(y) == 0)) ||
(ty == integer_tag && integer_value(y) == 0) ||
(ty == double_tag && double_value(y) == 0.0))) {
Cyc_rt_raise_msg(data, "Divide by zero");
}
if (tx == integer_tag && ty == -1) {
x->double_t.tag = double_tag;
x->double_t.value = ((double)x->integer_t.value) / (obj_obj2int(y));
} else if (tx == double_tag && ty == -1) {
x->double_t.value = x->double_t.value / (obj_obj2int(y));
} else if (tx == integer_tag && ty == integer_tag) {
x->double_t.tag = double_tag;
x->double_t.value = ((double)x->integer_t.value) / ((integer_type *)y)->value;
} else if (tx == double_tag && ty == integer_tag) {
x->double_t.value = x->double_t.value / ((integer_type *)y)->value;
} else if (tx == integer_tag && ty == double_tag) {
x->double_t.hdr.mark = gc_color_red;
x->double_t.hdr.grayed = 0;
x->double_t.tag = double_tag;
x->double_t.value = x->integer_t.value / ((double_type *)y)->value;
} else if (tx == double_tag && ty == double_tag) {
x->double_t.value = x->double_t.value / ((double_type *)y)->value;
} else {
make_string(s, "Bad argument type");
make_cons(c1, y, nil);
make_cons(c0, &s, &c1);
Cyc_rt_raise(data, &c0);
}
return x;
}
object Cyc_div(void *data, object cont, int argc, object n, ...) {
common_type buffer;
object result;
va_list ap;
va_start(ap, n);
result = Cyc_num_op_va_list(data, argc, Cyc_div_op, n, ap, &buffer);
va_end(ap);
return_closcall1(data, cont, result);
}
void dispatch_div(void *data, int argc, object clo, object cont, object n, ...) {
common_type buffer;
object result;
va_list ap;
va_start(ap, n);
result = Cyc_num_op_va_list(data, argc - 1, Cyc_div_op, n, ap, &buffer);
va_end(ap);
return_closcall1(data, cont, result);
}
declare_num_op(Cyc_sum, Cyc_sum_op, dispatch_sum, +, 0);
declare_num_op(Cyc_sub, Cyc_sub_op, dispatch_sub, -, 0);
declare_num_op(Cyc_mul, Cyc_mul_op, dispatch_mul, *, 0);
declare_num_op(Cyc_div, Cyc_div_op, dispatch_div, /, 1);
//declare_num_op(Cyc_div, Cyc_div_op2, dispatch_div, /, 1);
object Cyc_num_op_va_list(void *data, int argc, object (fn_op(void *, common_type *, object)), object n, va_list ns, common_type *buf) {
int i;