Hi!
There are lots of complaint about sqrt -- see bug #567. Martin Whitaker
prepared a patch which I converted to git form for easy apply.
Please review.
diff --git a/mingw-w64-crt/math/sqrt.def.h b/mingw-w64-crt/math/sqrt.def.h
index 602409a..b6f5460 100644
--- a/mingw-w64-crt/math/sqrt.def.h
+++ b/mingw-w64-crt/math/sqrt.def.h
@@ -66,14 +66,20 @@ __FLT_ABI (sqrt) (__FLT_TYPE x)
{
__FLT_TYPE res = __FLT_CST (0.0);
int x_class = fpclassify (x);
- if (x_class == FP_NAN || signbit (x))
+ if (x_class == FP_NAN)
{
- if (x_class == FP_ZERO)
- return __FLT_CST (-0.0);
-
__FLT_RPT_DOMAIN ("sqrt", x, 0.0, x);
return x;
}
+ else if (signbit (x))
+ {
+ if (x_class == FP_ZERO)
+ return __FLT_CST (-0.0);
+
+ res = -__FLT_NAN;
+ __FLT_RPT_DOMAIN ("sqrt", x, 0.0, res);
+ return res;
+ }
else if (x_class == FP_ZERO)
return __FLT_CST (0.0);
else if (x_class == FP_INFINITE)
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