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Diffstat (limited to 'newlib/libm/machine/xtensa/feraiseexcept.c')
-rw-r--r-- | newlib/libm/machine/xtensa/feraiseexcept.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/newlib/libm/machine/xtensa/feraiseexcept.c b/newlib/libm/machine/xtensa/feraiseexcept.c new file mode 100644 index 000000000..8d418f0fe --- /dev/null +++ b/newlib/libm/machine/xtensa/feraiseexcept.c @@ -0,0 +1,49 @@ +/* Copyright (c) 2011 Tensilica Inc. ALL RIGHTS RESERVED. + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + 1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the following + disclaimer in the documentation and/or other materials provided + with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL + TENSILICA INCORPORATED BE LIABLE FOR ANY DIRECT, INDIRECT, + INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + OF THE POSSIBILITY OF SUCH DAMAGE. */ + +#include <xtensa/config/core-isa.h> + +#if XCHAL_HAVE_FP || XCHAL_HAVE_DFP + +/* Xtensa doesn't trap, so setting the flags is the best we can + do. */ + +#include <fenv.h> + +int feraiseexcept(int excepts) +{ + fexcept_t current; + + if (excepts & ~FE_ALL_EXCEPT) + return -1; + asm ("rur.fsr %0" : "=a"(current)); + current |= excepts << _FE_EXCEPTION_FLAGS_OFFSET; + asm ("wur.fsr %0" : : "a"(current)); + return 0; +} + +#endif |