arm: add fenv support from glibc

1 files changed, 35 insertions, 0 deletions

diff --git a/libm/arm/fegetenv.c b/libm/arm/fegetenv.c
new file mode 100644
index 000000000..a9f63f5c9
--- /dev/null
+++ b/libm/arm/fegetenv.c
@@ -0,0 +1,35 @@
+/* Store current floating-point environment.
+   Copyright (C) 1997-2025 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 <fpu_control.h>
+#include "arm-features.h"
+
+
+int
+fegetenv (fenv_t *envp)
+{
+  fpu_control_t fpscr;
+
+  /* Fail if a VFP unit isn't present.  */
+  if (!ARM_HAVE_VFP)
+    return 1;
+
+  _FPU_GETCW (fpscr);
+  envp->__cw = fpscr;
+  return 0;
+}