| /* Definitions of target machine for GNU compiler, for MMIX. |
| Copyright (C) 2002 Free Software Foundation, Inc. |
| Contributed by Hans-Peter Nilsson (hp@bitrange.com) |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GCC is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* Node: Condition Code */ |
| |
| /* Like other non-CC0 ports, MMIX need to code which combination of |
| comparison insn and branch insn or conditional-set insn to use into the |
| condition mode. The CC mode depends partly on which condition is used |
| and partly on the type of the operands. */ |
| |
| /* The "usual" CC mode is used for a signed operands integer comparison, |
| where the CMP insn is used and the result is (integer) -1, 0 or 1 for |
| respectively a < b, a == b and a > b. */ |
| |
| /* The CC_UNS mode is for an unsigned operands integer comparison using |
| the CMPU insn. Result values correspond to those in CCmode. */ |
| CC_MODE (CC_UNS); |
| |
| /* The CC_FP mode is for a non-equality floating-point comparison, using |
| the FCMP or FCMPE insn. The result is (integer) -1 or 1 for |
| espectively a < b and a > b, otherwise 0. */ |
| CC_MODE (CC_FP); |
| |
| /* The CC_FPEQ mode is for an equality floating-point comparison, using |
| the FEQL or FEQLE insn. The result is (integer) 1 for a == b, |
| otherwise 0 (including NaN:s). */ |
| CC_MODE (CC_FPEQ); |
| |
| /* The CC_FUN mode is for an ordering comparison, using the FUN or FUNE |
| insn. The result is (integer) 1 if a is unordered to b, otherwise the |
| result is 0. */ |
| CC_MODE (CC_FUN); |