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76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/* Total order operation. flt-32 version.
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Copyright (C) 2016-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-float.h>
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#include <nan-high-order-bit.h>
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#include <stdint.h>
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#include <shlib-compat.h>
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#include <first-versions.h>
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int
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__totalorderf (const float *x, const float *y)
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{
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int32_t ix, iy;
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GET_FLOAT_WORD (ix, *x);
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GET_FLOAT_WORD (iy, *y);
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#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
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/* For the preferred quiet NaN convention, this operation is a
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comparison of the representations of the arguments interpreted as
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sign-magnitude integers. If both arguments are NaNs, invert the
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quiet/signaling bit so comparing that way works. */
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if ((ix & 0x7fffffff) > 0x7f800000 && (iy & 0x7fffffff) > 0x7f800000)
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{
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ix ^= 0x00400000;
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iy ^= 0x00400000;
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}
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#endif
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uint32_t ix_sign = ix >> 31;
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uint32_t iy_sign = iy >> 31;
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ix ^= ix_sign >> 1;
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iy ^= iy_sign >> 1;
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return ix <= iy;
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}
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#ifdef SHARED
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# define CONCATX(x, y) x ## y
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# define CONCAT(x, y) CONCATX (x, y)
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# define UNIQUE_ALIAS(name) CONCAT (name, __COUNTER__)
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# define do_symbol(orig_name, name, aliasname) \
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strong_alias (orig_name, name) \
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versioned_symbol (libm, name, aliasname, GLIBC_2_31)
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# undef weak_alias
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# define weak_alias(name, aliasname) \
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do_symbol (name, UNIQUE_ALIAS (name), aliasname);
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#endif
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libm_alias_float (__totalorder, totalorder)
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#if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
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int
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attribute_compat_text_section
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__totalorder_compatf (float x, float y)
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{
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return __totalorderf (&x, &y);
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}
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#undef do_symbol
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#define do_symbol(orig_name, name, aliasname) \
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strong_alias (orig_name, name) \
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compat_symbol (libm, name, aliasname, \
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CONCAT (FIRST_VERSION_libm_, aliasname))
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libm_alias_float (__totalorder_compat, totalorder)
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#endif
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