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glibc  2.9
q_cmpe.c
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00001 /* Software floating-point emulation.
00002    Compare a and b, return float condition code.
00003    Signal exception (unless masked) if unordered.
00004    Copyright (C) 1997,1999 Free Software Foundation, Inc.
00005    This file is part of the GNU C Library.
00006    Contributed by Richard Henderson (rth@cygnus.com) and
00007                 Jakub Jelinek (jj@ultra.linux.cz).
00008 
00009    The GNU C Library is free software; you can redistribute it and/or
00010    modify it under the terms of the GNU Lesser General Public
00011    License as published by the Free Software Foundation; either
00012    version 2.1 of the License, or (at your option) any later version.
00013 
00014    The GNU C Library is distributed in the hope that it will be useful,
00015    but WITHOUT ANY WARRANTY; without even the implied warranty of
00016    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00017    Lesser General Public License for more details.
00018 
00019    You should have received a copy of the GNU Lesser General Public
00020    License along with the GNU C Library; if not, write to the Free
00021    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00022    02111-1307 USA.  */
00023 
00024 #include "soft-fp.h"
00025 #include "quad.h"
00026 
00027 int _Q_cmpe(const long double a, const long double b)
00028 {
00029   FP_DECL_EX;
00030   FP_DECL_Q(A); FP_DECL_Q(B);
00031   int r;
00032 
00033   FP_UNPACK_RAW_Q(A, a);
00034   FP_UNPACK_RAW_Q(B, b);
00035   FP_CMP_Q(r, B, A, 3);
00036   if (r == -1) r = 2;
00037   if (r == 3)
00038     FP_SET_EXCEPTION(FP_EX_INVALID);
00039   FP_HANDLE_EXCEPTIONS;
00040 
00041   return r;
00042 }