1 files changed, 57 insertions, 0 deletions
diff --git a/libc/ports/sysdeps/aarch64/fpu/fesetenv.c b/libc/ports/sysdeps/aarch64/fpu/fesetenv.c
new file mode 100644
index 000000000..ec7da21ac
--- /dev/null
+++ b/libc/ports/sysdeps/aarch64/fpu/fesetenv.c
@@ -0,0 +1,57 @@
+/* Copyright (C) 1997-2012 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   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
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fesetenv (const fenv_t *envp)
+{
+  fpu_control_t fpcr;
+  fpu_fpsr_t fpsr;
+
+  _FPU_GETCW (fpcr);
+  _FPU_GETFPSR (fpsr);
+
+  fpcr &= _FPU_RESERVED;
+  fpsr &= _FPU_FPSR_RESERVED;
+
+  if (envp == FE_DFL_ENV)
+    {
+      fpcr |= _FPU_DEFAULT;
+      fpsr |= _FPU_FPSR_DEFAULT;
+    }
+  else if (envp == FE_NOMASK_ENV)
+    {
+      fpcr |= _FPU_FPCR_IEEE;
+      fpsr |= _FPU_FPSR_IEEE;
+    }
+  else
+    {
+      fpcr |= envp->__fpcr & ~_FPU_RESERVED;
+      fpsr |= envp->__fpsr & ~_FPU_FPSR_RESERVED;
+    }
+
+  _FPU_SETFPSR (fpsr);
+
+  _FPU_SETCW (fpcr);
+
+  return 0;
+}
+
+libm_hidden_def (fesetenv)