words insertion on k_expo2

Author: kirch7

src/math/k_expo2.rs

@@ -1,14 +1,14 @@
 use super::exp;
 
 /* k is such that k*ln2 has minimal relative error and x - kln2 > log(FLT_MIN) */
-const K: i64 = 2043;
+const K: i32 = 2043;
 
 /* expf(x)/2 for x >= log(FLT_MAX), slightly better than 0.5f*expf(x/2)*expf(x/2) */
 #[inline]
 pub(crate) fn k_expo2(x: f64) -> f64 {
     let k_ln2 = f64::from_bits(0x40962066151add8b);
     /* note that k is odd and scale*scale overflows */
-    let scale = f64::from_bits(((0x3ff + K / 2) as u64) << 20);
+    let scale = f64::from_bits(((((0x3ff + K / 2) as u32) << 20) as u64) << 32);
     /* exp(x - k ln2) * 2**(k-1) */
     exp(x - k_ln2) * scale * scale
 }