Move m68k from ports to libc

1 files changed, 74 insertions, 0 deletions

diff --git a/sysdeps/m68k/fpu/fesetenv.c b/sysdeps/m68k/fpu/fesetenv.c
new file mode 100644
index 0000000..6d91922
--- /dev/null
+++ b/sysdeps/m68k/fpu/fesetenv.c
@@ -0,0 +1,74 @@
+/* Install given floating-point environment.
+   Copyright (C) 1997-2014 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
+
+   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>
+
+int
+__fesetenv (const fenv_t *envp)
+{
+  fenv_t temp;
+
+  /* Install the environment specified by ENVP.  But there are a few
+     values which we do not want to come from the saved environment.
+     Therefore, we get the current environment and replace the values
+     we want to use from the environment specified by the parameter.  */
+#ifdef __mcoldfire__
+  __asm__ ("fmove%.l %/fpcr,%0" : "=dm" (temp.__control_register));
+  __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (temp.__status_register));
+  __asm__ ("fmove%.l %/fpiar,%0" : "=dm" (temp.__instruction_address));
+#else
+  __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*&temp));
+#endif
+
+  temp.__status_register &= ~FE_ALL_EXCEPT;
+  temp.__control_register &= ~((FE_ALL_EXCEPT << 6) | FE_UPWARD);
+  if (envp == FE_DFL_ENV)
+    ;
+  else if (envp == FE_NOMASK_ENV)
+    temp.__control_register |= FE_ALL_EXCEPT << 6;
+  else
+    {
+      temp.__control_register |= (envp->__control_register
+				  & ((FE_ALL_EXCEPT << 6) | FE_UPWARD));
+      temp.__status_register |= envp->__status_register & FE_ALL_EXCEPT;
+    }
+
+#ifdef __mcoldfire__
+  __asm__ __volatile__ ("fmove%.l %0,%/fpiar"
+			:: "dm" (temp.__instruction_address));
+  __asm__ __volatile__ ("fmove%.l %0,%/fpcr"
+			:: "dm" (temp.__control_register));
+  __asm__ __volatile__ ("fmove%.l %0,%/fpsr"
+			:: "dm" (temp.__status_register));
+#else
+  __asm__ __volatile__ ("fmovem%.l %0,%/fpcr/%/fpsr/%/fpiar" : : "m" (*&temp));
+#endif
+
+  /* Success.  */
+  return 0;
+}
+
+#include <shlib-compat.h>
+#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
+strong_alias (__fesetenv, __old_fesetenv)
+compat_symbol (libm, __old_fesetenv, fesetenv, GLIBC_2_1);
+#endif
+
+libm_hidden_ver (__fesetenv, fesetenv)
+versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2);