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untyped integral float index conversion to int

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kalsprite
2026-08-07 14:49:25 -07:00
parent e140512954
commit 5393a11ee1
3 changed files with 39 additions and 9 deletions
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6
src/exact_value.cpp
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@@ -419,6 +419,12 @@ gb_internal ExactValue exact_value_to_integer(ExactValue v) {
case ExactValue_Integer:
return v;
case ExactValue_Float: {
f64 const min = cast(f64)I64_MIN; // -2^63
f64 const max = -min; // 2^63, one past I64_MAX
// NOTE: the conversion below is undefined outside of this range, NaN included
if (!(v.value_float >= min && v.value_float < max)) {
break;
}
i64 i = cast(i64)v.value_float;
f64 f = cast(f64)i;
if (f == v.value_float) {