gcc/config/mmix/mmix-modes.def

   1 /* Definitions of target machine for GNU compiler, for MMIX.
   2    Copyright (C) 2002-2014 Free Software Foundation, Inc.
   3    Contributed by Hans-Peter Nilsson (hp@bitrange.com)
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC 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
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* Node: Condition Code */
  22
  23 /* Like other non-CC0 ports, MMIX need to code which combination of
  24    comparison insn and branch insn or conditional-set insn to use into the
  25    condition mode.  The CC mode depends partly on which condition is used
  26    and partly on the type of the operands.  */
  27
  28 /* The "usual" CC mode is used for a signed operands integer comparison,
  29    where the CMP insn is used and the result is (integer) -1, 0 or 1 for
  30    respectively a < b, a == b and a > b.  */
  31
  32 /* The CC_UNS mode is for an unsigned operands integer comparison using
  33    the CMPU insn.  Result values correspond to those in CCmode.  */
  34 CC_MODE (CC_UNS);
  35
  36 /* The CC_FP mode is for a non-equality floating-point comparison, using
  37    the FCMP or FCMPE insn.  The result is (integer) -1 or 1 for
  38    respectively a < b and a > b, otherwise 0.  */
  39 CC_MODE (CC_FP);
  40
  41 /* The CC_FPEQ mode is for an equality floating-point comparison, using
  42    the FEQL or FEQLE insn.  The result is (integer) 1 for a == b,
  43    otherwise 0 (including NaN:s).  */
  44 CC_MODE (CC_FPEQ);
  45
  46 /* The CC_FUN mode is for an ordering comparison, using the FUN or FUNE
  47    insn.  The result is (integer) 1 if a is unordered to b, otherwise the
  48    result is 0.  */
  49 CC_MODE (CC_FUN);