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Diffstat (limited to 'sysdeps/m68k/fpu/fesetenv.c')
-rw-r--r--sysdeps/m68k/fpu/fesetenv.c74
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 0000000000..6d91922dec
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+++ b/sysdeps/m68k/fpu/fesetenv.c
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+/* 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);