diff options
Diffstat (limited to 'sysdeps/ieee754/flt-32/s_totalorderf.c')
-rw-r--r-- | sysdeps/ieee754/flt-32/s_totalorderf.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/ieee754/flt-32/s_totalorderf.c b/sysdeps/ieee754/flt-32/s_totalorderf.c new file mode 100644 index 0000000000..1ed30d8116 --- /dev/null +++ b/sysdeps/ieee754/flt-32/s_totalorderf.c @@ -0,0 +1,45 @@ +/* Total order operation. flt-32 version. + Copyright (C) 2016 Free Software Foundation, Inc. + 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, see + <http://www.gnu.org/licenses/>. */ + +#include <math.h> +#include <math_private.h> +#include <stdint.h> + +int +totalorderf (float x, float y) +{ + int32_t ix, iy; + GET_FLOAT_WORD (ix, x); + GET_FLOAT_WORD (iy, y); +#ifdef HIGH_ORDER_BIT_IS_SET_FOR_SNAN + /* For the preferred quiet NaN convention, this operation is a + comparison of the representations of the arguments interpreted as + sign-magnitude integers. If both arguments are NaNs, invert the + quiet/signaling bit so comparing that way works. */ + if ((ix & 0x7fffffff) > 0x7f800000 && (iy & 0x7fffffff) > 0x7f800000) + { + ix ^= 0x00400000; + iy ^= 0x00400000; + } +#endif + uint32_t ix_sign = ix >> 31; + uint32_t iy_sign = iy >> 31; + ix ^= ix_sign >> 1; + iy ^= iy_sign >> 1; + return ix <= iy; +} |