add parenthesis in fma.c to clarify intent and silence warnings

diff --git a/src/math/fma.c b/src/math/fma.c
index 02f5c86..741ccd7 100644 (file)
--- a/src/math/fma.c
+++ b/src/math/fma.c
@@ -273,7 +273,7 @@ static inline double add_and_denormalize(double a, double b, int scale)
        if (sum.lo != 0) {
                uhi.f = sum.hi;
                bits_lost = -((int)(uhi.i >> 52) & 0x7ff) - scale + 1;
-               if (bits_lost != 1 ^ (int)(uhi.i & 1)) {
+               if ((bits_lost != 1) ^ (int)(uhi.i & 1)) {
                        /* hibits += (int)copysign(1.0, sum.hi * sum.lo) */
                        ulo.f = sum.lo;
                        uhi.i += 1 - (((uhi.i ^ ulo.i) >> 62) & 2);