1 files changed, 54 insertions, 0 deletions
diff --git a/newlib/libm/machine/xtensa/feholdexcept.c b/newlib/libm/machine/xtensa/feholdexcept.c
new file mode 100644
index 000000000..32e5e0b3b
--- /dev/null
+++ b/newlib/libm/machine/xtensa/feholdexcept.c
@@ -0,0 +1,54 @@
+/* Copyright (c) 2011 Tensilica Inc.  ALL RIGHTS RESERVED.
+
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+
+   1. Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+   2. Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+   FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
+   TENSILICA INCORPORATED BE LIABLE FOR ANY DIRECT, INDIRECT,
+   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+   OF THE POSSIBILITY OF SUCH DAMAGE.  */
+
+#include <xtensa/config/core-isa.h>
+
+#if XCHAL_HAVE_FP || XCHAL_HAVE_DFP
+
+#include <fenv.h>
+
+int feholdexcept(fenv_t * envp)
+{
+  fexcept_t fsr;
+  fenv_t fcr;
+  /* Get the environment.  */
+  asm ("rur.fcr %0" : "=a"(fcr));
+  asm ("rur.fsr %0" : "=a"(fsr));
+  *envp = fsr | fcr;
+
+  /* Clear the exception enable flags.  */
+  fcr &= _FE_ROUND_MODE_MASK;
+  asm ("wur.fcr %0" : :"a"(fcr));
+
+  /* Clear the exception happened flags.  */
+  fsr = 0;
+  asm ("wur.fsr %0" : :"a"(fsr));
+
+  return 0;
+}
+
+#endif