sysdeps/alpha/soft-fp/ots_cmpe.c

   1 /* Software floating-point emulation: comparison.
   2    Copyright (C) 1997,1999,2004 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by Richard Henderson (rth@cygnus.com) and
   5                   Jakub Jelinek (jj@ultra.linux.cz).
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #include "local-soft-fp.h"
  23
  24 static long
  25 internal_compare (long al, long ah, long bl, long bh)
  26 {
  27   FP_DECL_EX;
  28   FP_DECL_Q(A); FP_DECL_Q(B);
  29   long r;
  30
  31   FP_UNPACK_RAW_Q(A, a);
  32   FP_UNPACK_RAW_Q(B, b);
  33   FP_CMP_Q (r, A, B, 2);
  34
  35   /* Relative comparisons signal invalid operation if either operand is NaN. */
  36   if (r == 2)
  37     {
  38       FP_SET_EXCEPTION(FP_EX_INVALID);
  39       FP_HANDLE_EXCEPTIONS;
  40     }
  41
  42   return r;
  43 }
  44
  45 long
  46 _OtsLssX (long al, long ah, long bl, long bh)
  47 {
  48   long r = internal_compare (al, ah, bl, bh);
  49   if (r == 2)
  50     return -1;
  51   else
  52     return r < 0;
  53 }
  54
  55 long
  56 _OtsLeqX (long al, long ah, long bl, long bh)
  57 {
  58   long r = internal_compare (al, ah, bl, bh);
  59   if (r == 2)
  60     return -1;
  61   else
  62     return r <= 0;
  63 }
  64
  65 long
  66 _OtsGtrX (long al, long ah, long bl, long bh)
  67 {
  68   long r = internal_compare (al, ah, bl, bh);
  69   if (r == 2)
  70     return -1;
  71   else
  72     return r > 0;
  73 }
  74
  75 long
  76 _OtsGeqX (long al, long ah, long bl, long bh)
  77 {
  78   long r = internal_compare (al, ah, bl, bh);
  79   if (r == 2)
  80     return -1;
  81   else
  82     return r >= 0;
  83 }