gomp-20050608-branch/gcc/config/i386/i386-modes.def

   1 /* Definitions of target machine for GCC for IA-32.
   2    Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  19 Boston, MA 02110-1301, USA.  */
  20
  21 /* The x86_64 ABI specifies both XF and TF modes.
  22    XFmode is __float80 is IEEE extended; TFmode is __float128
  23    is IEEE quad.  */
  24
  25 FRACTIONAL_FLOAT_MODE (XF, 80, 12, ieee_extended_intel_96_format);
  26 FLOAT_MODE (TF, 16, ieee_quad_format);
  27
  28 /* In ILP32 mode, XFmode has size 12 and alignment 4.
  29    In LP64 mode, XFmode has size and alignment 16.  */
  30 ADJUST_FLOAT_FORMAT (XF, (TARGET_128BIT_LONG_DOUBLE
  31                           ? &ieee_extended_intel_128_format
  32                           : TARGET_96_ROUND_53_LONG_DOUBLE
  33                           ? &ieee_extended_intel_96_round_53_format
  34                           : &ieee_extended_intel_96_format));
  35 ADJUST_BYTESIZE  (XF, TARGET_128BIT_LONG_DOUBLE ? 16 : 12);
  36 ADJUST_ALIGNMENT (XF, TARGET_128BIT_LONG_DOUBLE ? 16 : 4);
  37
  38 /* Add any extra modes needed to represent the condition code.
  39
  40    For the i386, we need separate modes when floating-point
  41    equality comparisons are being done.
  42
  43    Add CCNO to indicate comparisons against zero that requires
  44    Overflow flag to be unset.  Sign bit test is used instead and
  45    thus can be used to form "a&b>0" type of tests.
  46
  47    Add CCGC to indicate comparisons against zero that allows
  48    unspecified garbage in the Carry flag.  This mode is used
  49    by inc/dec instructions.
  50
  51    Add CCGOC to indicate comparisons against zero that allows
  52    unspecified garbage in the Carry and Overflow flag. This
  53    mode is used to simulate comparisons of (a-b) and (a+b)
  54    against zero using sub/cmp/add operations.
  55
  56    Add CCZ to indicate that only the Zero flag is valid.  */
  57
  58 CC_MODE (CCGC);
  59 CC_MODE (CCGOC);
  60 CC_MODE (CCNO);
  61 CC_MODE (CCZ);
  62 CC_MODE (CCFP);
  63 CC_MODE (CCFPU);
  64
  65 /* Vector modes.  */
  66 VECTOR_MODES (INT, 4);        /*            V4QI V2HI */
  67 VECTOR_MODES (INT, 8);        /*       V8QI V4HI V2SI */
  68 VECTOR_MODES (INT, 16);       /* V16QI V8HI V4SI V2DI */
  69 VECTOR_MODES (FLOAT, 8);      /*            V4HF V2SF */
  70 VECTOR_MODES (FLOAT, 16);     /*       V8HF V4SF V2DF */
  71 VECTOR_MODE (INT, DI, 4);     /*                 V4DI */
  72 VECTOR_MODE (INT, SI, 8);     /*                 V8SI */
  73 VECTOR_MODE (INT, HI, 16);    /*                V16HI */
  74 VECTOR_MODE (INT, QI, 32);    /*                V32QI */
  75 VECTOR_MODE (FLOAT, DF, 4);   /*                 V4DF */
  76 VECTOR_MODE (FLOAT, SF, 8);   /*                 V8SF */
  77
  78 /* The symbol Pmode stands for one of the above machine modes (usually SImode).
  79    The tm.h file specifies which one.  It is not a distinct mode.  */