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jeremybenn |
/* Definitions of target machine for GNU compiler, for MMIX.
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Copyright (C) 2002, 2004, 2007 Free Software Foundation, Inc.
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Contributed by Hans-Peter Nilsson (hp@bitrange.com)
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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. */
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/* Node: Condition Code */
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/* Like other non-CC0 ports, MMIX need to code which combination of
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comparison insn and branch insn or conditional-set insn to use into the
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condition mode. The CC mode depends partly on which condition is used
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and partly on the type of the operands. */
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/* The "usual" CC mode is used for a signed operands integer comparison,
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where the CMP insn is used and the result is (integer) -1, 0 or 1 for
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respectively a < b, a == b and a > b. */
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/* The CC_UNS mode is for an unsigned operands integer comparison using
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the CMPU insn. Result values correspond to those in CCmode. */
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CC_MODE (CC_UNS);
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/* The CC_FP mode is for a non-equality floating-point comparison, using
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the FCMP or FCMPE insn. The result is (integer) -1 or 1 for
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respectively a < b and a > b, otherwise 0. */
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CC_MODE (CC_FP);
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/* The CC_FPEQ mode is for an equality floating-point comparison, using
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the FEQL or FEQLE insn. The result is (integer) 1 for a == b,
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otherwise 0 (including NaN:s). */
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CC_MODE (CC_FPEQ);
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/* The CC_FUN mode is for an ordering comparison, using the FUN or FUNE
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insn. The result is (integer) 1 if a is unordered to b, otherwise the
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result is 0. */
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CC_MODE (CC_FUN);
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