math: fix signed int left shift ub in sqrt

[musl] / src / math / sqrt.c

diff --git a/src/math/sqrt.c b/src/math/sqrt.c
index b277567..f1f6d76 100644 (file)
--- a/src/math/sqrt.c
+++ b/src/math/sqrt.c
@@ -179,7 +179,6 @@ double sqrt(double x)
        ix1 = q1>>1;
        if (q&1)
                ix1 |= sign;
-       ix0 += m << 20;
-       INSERT_WORDS(z, ix0, ix1);
+       INSERT_WORDS(z, ix0 + ((uint32_t)m << 20), ix1);
        return z;
 }