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glibc  2.9
ots_cmpe.c
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00001 /* Software floating-point emulation: comparison.
00002    Copyright (C) 1997,1999,2004 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Richard Henderson (rth@cygnus.com) and
00005                 Jakub Jelinek (jj@ultra.linux.cz).
00006 
00007    The GNU C Library is free software; you can redistribute it and/or
00008    modify it under the terms of the GNU Lesser General Public
00009    License as published by the Free Software Foundation; either
00010    version 2.1 of the License, or (at your option) any later version.
00011 
00012    The GNU C Library is distributed in the hope that it will be useful,
00013    but WITHOUT ANY WARRANTY; without even the implied warranty of
00014    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015    Lesser General Public License for more details.
00016 
00017    You should have received a copy of the GNU Lesser General Public
00018    License along with the GNU C Library; if not, write to the Free
00019    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00020    02111-1307 USA.  */
00021 
00022 #include "local-soft-fp.h"
00023 
00024 static long
00025 internal_compare (long al, long ah, long bl, long bh)
00026 {
00027   FP_DECL_EX;
00028   FP_DECL_Q(A); FP_DECL_Q(B);
00029   long r;
00030 
00031   FP_UNPACK_RAW_Q(A, a);
00032   FP_UNPACK_RAW_Q(B, b);
00033   FP_CMP_Q (r, A, B, 2);
00034 
00035   /* Relative comparisons signal invalid operation if either operand is NaN. */
00036   if (r == 2)
00037     {
00038       FP_SET_EXCEPTION(FP_EX_INVALID);
00039       FP_HANDLE_EXCEPTIONS;
00040     }
00041 
00042   return r;
00043 }
00044 
00045 long
00046 _OtsLssX (long al, long ah, long bl, long bh)
00047 {
00048   long r = internal_compare (al, ah, bl, bh);
00049   if (r == 2)
00050     return -1;
00051   else
00052     return r < 0;
00053 }
00054 
00055 long
00056 _OtsLeqX (long al, long ah, long bl, long bh)
00057 {
00058   long r = internal_compare (al, ah, bl, bh);
00059   if (r == 2)
00060     return -1;
00061   else
00062     return r <= 0;
00063 }
00064 
00065 long
00066 _OtsGtrX (long al, long ah, long bl, long bh)
00067 {
00068   long r = internal_compare (al, ah, bl, bh);
00069   if (r == 2)
00070     return -1;
00071   else
00072     return r > 0;
00073 }
00074 
00075 long
00076 _OtsGeqX (long al, long ah, long bl, long bh)
00077 {
00078   long r = internal_compare (al, ah, bl, bh);
00079   if (r == 2)
00080     return -1;
00081   else
00082     return r >= 0;
00083 }