From cf349fcbb555b77f22d96fe3a7b25579337ab989 Mon Sep 17 00:00:00 2001 From: Markos Chandras Date: Thu, 26 Nov 2009 10:20:01 +0000 Subject: libm: Add support for the Meta architecture Signed-off-by: Markos Chandras Signed-off-by: Bernhard Reutner-Fischer --- libm/metag/fesetenv.c | 60 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 libm/metag/fesetenv.c (limited to 'libm/metag/fesetenv.c') diff --git a/libm/metag/fesetenv.c b/libm/metag/fesetenv.c new file mode 100644 index 000000000..7295492b8 --- /dev/null +++ b/libm/metag/fesetenv.c @@ -0,0 +1,60 @@ +/* Install given floating-point environment. + Copyright (C) 2013 Imagination Technologies Ltd. + This file is part of the GNU C Library. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include + +#include "internal.h" + +libm_hidden_proto(fesetenv) + +int +fesetenv (const fenv_t *envp) +{ + unsigned int exc; + unsigned int txmode; + + __asm__ ("MOV %0,TXMODE" : "=r" (txmode)); + + /* Clear rounding mode bits (round to nearest). */ + txmode &= ~(0x3 << 16); + + if (envp == FE_DFL_ENV) + { + exc = 0; + } + else if (envp == FE_NOMASK_ENV) + { + exc = 0x1f; + } + else + { + exc = envp->txdefr & (FE_ALL_EXCEPT | (FE_ALL_EXCEPT << 16)); + /* Write rounding mode and guard bit. */ + txmode |= (0x1 << 18 ) | (envp->txmode & (0x3 << 16)); + } + + __asm__ ("MOV TXMODE,%0" : : "r" (txmode)); + + metag_set_fpu_flags(exc); + + /* Success. */ + return 0; +} +libm_hidden_def(fesetenv) -- cgit v1.2.3