fix fesetround error checking

Rounding modes are not bit flags, but arbitrary non-negative integers.

diff --git a/src/fenv/fesetround.c b/src/fenv/fesetround.c
index 50e58f1..4e2f164 100644 (file)
--- a/src/fenv/fesetround.c
+++ b/src/fenv/fesetround.c
@@ -7,18 +7,17 @@ hidden int __fesetround(int);
 
 int fesetround(int r)
 {
-       if (r & ~(
-               FE_TONEAREST
+       if (r != FE_TONEAREST
 #ifdef FE_DOWNWARD
-               |FE_DOWNWARD
+               && r != FE_DOWNWARD
 #endif
 #ifdef FE_UPWARD
-               |FE_UPWARD
+               && r != FE_UPWARD
 #endif
 #ifdef FE_TOWARDZERO
-               |FE_TOWARDZERO
+               && r != FE_TOWARDZERO
 #endif
-               ))
+       )
                return -1;
        return __fesetround(r);
 }