fastmath: Prefer signed addition instead of unsigned wrapped
diff --git a/src/fastmath.h b/src/fastmath.h
index 221d69f..c61ae64 100644
--- a/src/fastmath.h
+++ b/src/fastmath.h
@@ -42,10 +42,10 @@
* return 2^exp
*/
static inline float lc3_ldexpf(float _x, int exp) {
- union { float f; uint32_t u; } x = { .f = _x };
+ union { float f; int32_t s; } x = { .f = _x };
- if (x.u & LC3_IEEE754_EXP_MASK)
- x.u += exp << LC3_IEEE754_EXP_SHL;
+ if (x.s & LC3_IEEE754_EXP_MASK)
+ x.s += exp << LC3_IEEE754_EXP_SHL;
return x.f;
}