csky: add fenv support from glibcHEADmaster

1 files changed, 40 insertions, 0 deletions

diff --git a/libm/csky/fedisblxcpt.c b/libm/csky/fedisblxcpt.c
new file mode 100644
index 000000000..e518968ab
--- /dev/null
+++ b/libm/csky/fedisblxcpt.c
@@ -0,0 +1,40 @@
+/* Disable floating-point exceptions.
+   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/>.  */
+
+#include <fenv.h>
+#include "fenv_libc.h"
+#include <fpu_control.h>
+
+int
+fedisableexcept (int excepts)
+{
+  unsigned int new_exc, old_exc;
+
+  /* Get the current control word.  */
+  _FPU_GETCW (new_exc);
+
+  old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT;
+
+  /* Get the except disable mask.  */
+  excepts &= FE_ALL_EXCEPT;
+  new_exc &= ~(excepts << ENABLE_SHIFT);
+
+  /* Put the new data in effect.  */
+  _FPU_SETCW (new_exc);
+
+  return old_exc;
+}