1 files changed, 84 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/or1k/bits/fenv.h b/libc/sysdeps/linux/or1k/bits/fenv.h
new file mode 100644
index 000000000..4701946ff
--- /dev/null
+++ b/libc/sysdeps/linux/or1k/bits/fenv.h
@@ -0,0 +1,84 @@
+/* Floating point environment, OpenRISC version.
+   Copyright (C) 2022-2025 Free Software Foundation, Inc.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+#ifdef __or1k_hard_float__
+/* Define bits representing exceptions in the FPCSR status word.  */
+enum
+  {
+    FE_OVERFLOW =
+#define FE_OVERFLOW	(1 << 3)
+      FE_OVERFLOW,
+    FE_UNDERFLOW =
+#define FE_UNDERFLOW	(1 << 4)
+      FE_UNDERFLOW,
+    FE_INEXACT =
+#define FE_INEXACT	(1 << 8)
+      FE_INEXACT,
+    FE_INVALID =
+#define FE_INVALID	(1 << 9)
+      FE_INVALID,
+    FE_DIVBYZERO =
+#define FE_DIVBYZERO	(1 << 11)
+      FE_DIVBYZERO,
+  };
+
+/* All supported exceptions.  */
+#define FE_ALL_EXCEPT	\
+	(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
+
+/* Define bits representing rounding modes in the FPCSR Rmode field.  */
+#define FE_TONEAREST  (0x0 << 1)
+#define FE_TOWARDZERO (0x1 << 1)
+#define FE_UPWARD     (0x2 << 1)
+#define FE_DOWNWARD   (0x3 << 1)
+
+#else
+
+/* In the soft-float case only rounding to nearest is supported, with
+   no exceptions.  */
+
+enum
+  {
+    __FE_UNDEFINED = -1,
+
+    FE_TONEAREST =
+# define FE_TONEAREST	0x0
+      FE_TONEAREST
+  };
+
+# define FE_ALL_EXCEPT 0
+
+#endif /* __or1k_hard_float__ */
+
+/* Type representing exception flags.  */
+typedef unsigned int fexcept_t;
+
+/* Type representing floating-point environment.  */
+typedef unsigned int fenv_t;
+
+/* If the default argument is used we use this value.  */
+#define FE_DFL_ENV	((const fenv_t *) -1l)
+
+/* Type representing floating-point control modes.  */
+typedef unsigned int femode_t;
+
+/* Default floating-point control modes.  */
+# define FE_DFL_MODE	((const femode_t *) -1L)