65 lines
2.4 KiB
Modula-2
65 lines
2.4 KiB
Modula-2
/* Definitions of target machine for GCC for IA-32.
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Copyright (C) 2002 Free Software Foundation, Inc.
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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 2, 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 COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* x86_64 ABI specifies both XF and TF modes.
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XFmode is __float80 is IEEE extended; TFmode is __float128
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is IEEE quad.
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IEEE extended is 128 bits wide, except in ILP32 mode, but we
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have to say it's 12 bytes so that the bitsize and wider_mode
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tables are correctly set up. We correct its size below. */
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FLOAT_MODE (XF, 12, ieee_extended_intel_96_format);
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ADJUST_FLOAT_FORMAT (XF, (TARGET_128BIT_LONG_DOUBLE
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? &ieee_extended_intel_128_format
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: TARGET_96_ROUND_53_LONG_DOUBLE
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? &ieee_extended_intel_96_round_53_format
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: &ieee_extended_intel_96_format));
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ADJUST_BYTESIZE (XF, TARGET_128BIT_LONG_DOUBLE ? 16 : 12);
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ADJUST_ALIGNMENT (XF, TARGET_128BIT_LONG_DOUBLE ? 16 : 4);
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FLOAT_MODE (TF, 16, ieee_quad_format);
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/* Add any extra modes needed to represent the condition code.
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For the i386, we need separate modes when floating-point
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equality comparisons are being done.
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Add CCNO to indicate comparisons against zero that requires
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Overflow flag to be unset. Sign bit test is used instead and
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thus can be used to form "a&b>0" type of tests.
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Add CCGC to indicate comparisons against zero that allows
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unspecified garbage in the Carry flag. This mode is used
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by inc/dec instructions.
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Add CCGOC to indicate comparisons against zero that allows
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unspecified garbage in the Carry and Overflow flag. This
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mode is used to simulate comparisons of (a-b) and (a+b)
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against zero using sub/cmp/add operations.
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Add CCZ to indicate that only the Zero flag is valid. */
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CC_MODE (CCGC);
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CC_MODE (CCGOC);
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CC_MODE (CCNO);
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CC_MODE (CCZ);
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CC_MODE (CCFP);
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CC_MODE (CCFPU);
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