ports/sysdeps/alpha/soft-fp/ots_cmpe.c

   1 /* Software floating-point emulation: comparison.
   2    Copyright (C) 1997-2014 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, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include "local-soft-fp.h"
  22
  23 static long
  24 internal_compare (long al, long ah, long bl, long bh)
  25 {
  26   FP_DECL_EX;
  27   FP_DECL_Q(A); FP_DECL_Q(B);
  28   long r;
  29
  30   FP_UNPACK_RAW_Q(A, a);
  31   FP_UNPACK_RAW_Q(B, b);
  32   FP_CMP_Q (r, A, B, 2);
  33
  34   /* Relative comparisons signal invalid operation if either operand is NaN. */
  35   if (r == 2)
  36     {
  37       FP_SET_EXCEPTION(FP_EX_INVALID);
  38       FP_HANDLE_EXCEPTIONS;
  39     }
  40
  41   return r;
  42 }
  43
  44 long
  45 _OtsLssX (long al, long ah, long bl, long bh)
  46 {
  47   long r = internal_compare (al, ah, bl, bh);
  48   if (r == 2)
  49     return -1;
  50   else
  51     return r < 0;
  52 }
  53
  54 long
  55 _OtsLeqX (long al, long ah, long bl, long bh)
  56 {
  57   long r = internal_compare (al, ah, bl, bh);
  58   if (r == 2)
  59     return -1;
  60   else
  61     return r <= 0;
  62 }
  63
  64 long
  65 _OtsGtrX (long al, long ah, long bl, long bh)
  66 {
  67   long r = internal_compare (al, ah, bl, bh);
  68   if (r == 2)
  69     return -1;
  70   else
  71     return r > 0;
  72 }
  73
  74 long
  75 _OtsGeqX (long al, long ah, long bl, long bh)
  76 {
  77   long r = internal_compare (al, ah, bl, bh);
  78   if (r == 2)
  79     return -1;
  80   else
  81     return r >= 0;
  82 }