csky: add fenv support from glibcHEADmaster

1 files changed, 29 insertions, 0 deletions

diff --git a/libm/csky/fenv_libc.h b/libm/csky/fenv_libc.h
new file mode 100644
index 000000000..44e89812d
--- /dev/null
+++ b/libm/csky/fenv_libc.h
@@ -0,0 +1,29 @@
+/* fpu registers environment.  C-SKY version.
+   Copyright (C) 2018-2025 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_LIBC_H
+#define _FENV_LIBC_H	1
+
+/* Mask for enabling exceptions and for the CAUSE bits.  */
+#define ENABLE_MASK	0x0003FU
+#define CAUSE_MASK	0x3F000U
+
+/* Shift for FE_* flags to get up to the ENABLE bits and the CAUSE bits.  */
+#define ENABLE_SHIFT	0
+#define CAUSE_SHIFT	8
+
+#endif /* fenv_libc.h */