Fix fast_exp2 with MSVC and sse4.2

AcademySoftwareFoundation · Apr 14, 2023 · defb06b · defb06b
1 parent a77e362
commit defb06b
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/include/OpenImageIO/fmath.h b/src/include/OpenImageIO/fmath.h
@@ -2068,7 +2068,10 @@ OIIO_FORCEINLINE OIIO_HOSTDEVICE T fast_exp2 (const T& xval) {
     r = madd(x, r, kD);
     r = madd(x, r, kE);
     r = madd(x, r, one);
-    return bitcast_to_float (bitcast_to_int(r) + (m << 23));
+
+    intN i = bitcast_to_int(r);
+    T f = bitcast_to_float(i + (m << 23));
+    return f;
 #else
     T r;
     for (int i = 0; i < r.elements; ++i)