fix fenv exception functions to mask their argument

fesetround.c is a wrapper to do the arch independent argument
check (on archs where rounding mode is not stored in 2 bits
__fesetround still has to check its arguments)

on powerpc fe*except functions do not accept the extra invalid
flags of its fpscr register

the useless FENV_ACCESS pragma was removed from feupdateenv

1 files changed, 23 insertions, 0 deletions

diff --git a/src/fenv/fesetround.c b/src/fenv/fesetround.c
new file mode 100644
index 00000000..9bbd4ade
--- /dev/null
+++ b/src/fenv/fesetround.c
@@ -0,0 +1,23 @@
+#include <fenv.h>
+
+/* __fesetround wrapper for arch independent argument check */
+
+int __fesetround(int);
+
+int fesetround(int r)
+{
+	if (r & ~(
+		FE_TONEAREST
+#ifdef FE_DOWNWARD
+		|FE_DOWNWARD
+#endif
+#ifdef FE_UPWARD
+		|FE_UPWARD
+#endif
+#ifdef FE_TOWARDZERO
+		|FE_TOWARDZERO
+#endif
+		))
+		return -1;
+	return __fesetround(r);
+}