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Diffstat (limited to 'ports/sysdeps/hppa/fpu/fesetenv.c')
-rw-r--r--ports/sysdeps/hppa/fpu/fesetenv.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/ports/sysdeps/hppa/fpu/fesetenv.c b/ports/sysdeps/hppa/fpu/fesetenv.c
new file mode 100644
index 0000000000..e768bb2c37
--- /dev/null
+++ b/ports/sysdeps/hppa/fpu/fesetenv.c
@@ -0,0 +1,63 @@
+/* Install given floating-point environment.
+ Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by David Huggins-Daines <dhd@debian.org>, 2000
+ Based on the m68k version by
+ Andreas Schwab <schwab@suse.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)
+{
+ union { unsigned long long buf[4]; fenv_t env; } temp;
+ unsigned long long *bufptr;
+
+ /* 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. */
+ bufptr = temp.buf;
+ __asm__ (
+ "fstd,ma %%fr0,8(%1)\n"
+ : "=m" (temp) : "r" (bufptr) : "%r0");
+
+ temp.env.__status_word &= ~(FE_ALL_EXCEPT
+ | (FE_ALL_EXCEPT << 27)
+ | FE_DOWNWARD);
+ if (envp == FE_DFL_ENV)
+ ;
+ else if (envp == FE_NOMASK_ENV)
+ temp.env.__status_word |= FE_ALL_EXCEPT;
+ else
+ temp.env.__status_word |= (envp->__status_word
+ & (FE_ALL_EXCEPT
+ | FE_DOWNWARD
+ | (FE_ALL_EXCEPT << 27)));
+
+ /* Load the new environment. We use bufptr again since the
+ initial asm has modified the value of the register and here
+ we take advantage of that to load in reverse order so fr0
+ is loaded last and T-Bit is enabled. */
+ __asm__ (
+ "fldd,mb -8(%1),%%fr0\n"
+ : : "m" (temp), "r" (bufptr) : "%r0" );
+
+ /* Success. */
+ return 0;
+}
+libm_hidden_def (fesetenv)