From e64ac02c24b43659048622714afdc92fedf561fa Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Sun, 1 Jul 2012 13:06:41 +0000 Subject: Move all files into ports/ subdirectory in preparation for merge with glibc --- ports/sysdeps/alpha/fpu/fesetenv.c | 56 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 ports/sysdeps/alpha/fpu/fesetenv.c (limited to 'ports/sysdeps/alpha/fpu/fesetenv.c') diff --git a/ports/sysdeps/alpha/fpu/fesetenv.c b/ports/sysdeps/alpha/fpu/fesetenv.c new file mode 100644 index 0000000000..51d7ac794a --- /dev/null +++ b/ports/sysdeps/alpha/fpu/fesetenv.c @@ -0,0 +1,56 @@ +/* Install given floating-point environment. + Copyright (C) 1997,99,2000,01,02 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson , 1997 + + 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 + . */ + +#include + +int +__fesetenv (const fenv_t *envp) +{ + unsigned long int fpcr; + fenv_t env; + + /* Magic encoding of default values: high bit set (never possible for a + user-space address) is not indirect. And we don't even have to get + rid of it since we mask things around just below. */ + if ((long int) envp >= 0) + env = *envp; + else + env = (unsigned long int) envp; + + /* Reset the rounding mode with the hardware fpcr. Note that the following + system call is an implied trap barrier for our modification. */ + __asm__ __volatile__ ("excb; mf_fpcr %0" : "=f" (fpcr)); + fpcr = (fpcr & ~FPCR_ROUND_MASK) | (env & FPCR_ROUND_MASK); + __asm__ __volatile__ ("mt_fpcr %0" : : "f" (fpcr)); + + /* Reset the exception status and mask with the kernel's FP code. */ + __ieee_set_fp_control (env & SWCR_ALL_MASK); + + /* Success. */ + return 0; +} + +#include +#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); -- cgit v1.2.3