diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_totalorder.c | 53 | ||||
| -rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c | 49 |
2 files changed, 102 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_totalorder.c b/sysdeps/ieee754/dbl-64/s_totalorder.c new file mode 100644 index 0000000000..73ac32f78b --- /dev/null +++ b/sysdeps/ieee754/dbl-64/s_totalorder.c @@ -0,0 +1,53 @@ +/* Total order operation. dbl-64 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 +totalorder (double x, double y) +{ + int32_t hx, hy; + uint32_t lx, ly; + EXTRACT_WORDS (hx, lx, x); + EXTRACT_WORDS (hy, ly, y); +#ifdef HIGH_ORDER_BIT_IS_SET_FOR_SNAN + uint32_t uhx = hx & 0x7fffffff, uhy = hy & 0x7fffffff; + /* 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 ((uhx > 0x7ff00000 || (uhx == 0x7ff00000 && lx != 0)) + && (uhy > 0x7ff00000 || (uhy == 0x7ff00000 && ly != 0))) + { + hx ^= 0x00080000; + hy ^= 0x00080000; + } +#endif + uint32_t hx_sign = hx >> 31; + uint32_t hy_sign = hy >> 31; + hx ^= hx_sign >> 1; + lx ^= hx_sign; + hy ^= hy_sign >> 1; + ly ^= hy_sign; + return hx < hy || (hx == hy && lx <= ly); +} +#ifdef NO_LONG_DOUBLE +weak_alias (totalorder, totalorderl) +#endif diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c new file mode 100644 index 0000000000..02cd799cf6 --- /dev/null +++ b/sysdeps/ieee754/dbl-64/wordsize-64/s_totalorder.c @@ -0,0 +1,49 @@ +/* Total order operation. dbl-64/wordsize-64 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 +totalorder (double x, double y) +{ + int64_t ix, iy; + EXTRACT_WORDS64 (ix, x); + EXTRACT_WORDS64 (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 & 0x7fffffffffffffffULL) > 0x7ff0000000000000ULL + && (iy & 0x7fffffffffffffffULL) > 0x7ff0000000000000ULL) + { + ix ^= 0x0008000000000000ULL; + iy ^= 0x0008000000000000ULL; + } +#endif + uint64_t ix_sign = ix >> 63; + uint64_t iy_sign = iy >> 63; + ix ^= ix_sign >> 1; + iy ^= iy_sign >> 1; + return ix <= iy; +} +#ifdef NO_LONG_DOUBLE +weak_alias (totalorder, totalorderl) +#endif |