fix windows

Author: youknowone

src/math/aggregate.rs

@@ -27,7 +27,7 @@ fn dl_sum(a: f64, b: f64) -> DoubleLength {
 }
 
 /// Algorithm 3.5. Error-free transformation of a product using FMA
-#[cfg(feature = "mul_add")]
+#[cfg(any(feature = "mul_add", target_os = "windows"))]
 #[inline]
 fn dl_mul(x: f64, y: f64) -> DoubleLength {
     let z = x * y;
@@ -36,7 +36,7 @@ fn dl_mul(x: f64, y: f64) -> DoubleLength {
 }
 
 /// Dekker's algorithm for error-free product without FMA
-#[cfg(not(feature = "mul_add"))]
+#[cfg(not(any(feature = "mul_add", target_os = "windows")))]
 #[inline]
 fn dl_mul(x: f64, y: f64) -> DoubleLength {
     // Dekker (5.5) and (5.6) - split