gcc/config/i386/i386-modes.def

   1 /* Definitions of target machine for GCC for IA-32.
   2    Copyright (C) 2002-2014 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 3, 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 COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 /* The x86_64 ABI specifies both XF and TF modes.
  21    XFmode is __float80 is IEEE extended; TFmode is __float128
  22    is IEEE quad.  */
  23
  24 FRACTIONAL_FLOAT_MODE (XF, 80, 12, ieee_extended_intel_96_format);
  25 FLOAT_MODE (TF, 16, ieee_quad_format);
  26
  27 /* In ILP32 mode, XFmode has size 12 and alignment 4.
  28    In LP64 mode, XFmode has size and alignment 16.  */
  29 ADJUST_FLOAT_FORMAT (XF, (TARGET_128BIT_LONG_DOUBLE
  30                           ? &ieee_extended_intel_128_format
  31                           : TARGET_96_ROUND_53_LONG_DOUBLE
  32                           ? &ieee_extended_intel_96_round_53_format
  33                           : &ieee_extended_intel_96_format));
  34 ADJUST_BYTESIZE  (XF, TARGET_128BIT_LONG_DOUBLE ? 16 : 12);
  35 ADJUST_ALIGNMENT (XF, TARGET_128BIT_LONG_DOUBLE ? 16 : 4);
  36
  37 /* Add any extra modes needed to represent the condition code.
  38
  39    For the i386, we need separate modes when floating-point
  40    equality comparisons are being done.
  41
  42    Add CCNO to indicate comparisons against zero that requires
  43    Overflow flag to be unset.  Sign bit test is used instead and
  44    thus can be used to form "a&b>0" type of tests.
  45
  46    Add CCGC to indicate comparisons against zero that allows
  47    unspecified garbage in the Carry flag.  This mode is used
  48    by inc/dec instructions.
  49
  50    Add CCGOC to indicate comparisons against zero that allows
  51    unspecified garbage in the Carry and Overflow flag. This
  52    mode is used to simulate comparisons of (a-b) and (a+b)
  53    against zero using sub/cmp/add operations.
  54
  55    Add CCA to indicate that only the Above flag is valid.
  56    Add CCC to indicate that only the Carry flag is valid.
  57    Add CCO to indicate that only the Overflow flag is valid.
  58    Add CCS to indicate that only the Sign flag is valid.
  59    Add CCZ to indicate that only the Zero flag is valid.  */
  60
  61 CC_MODE (CCGC);
  62 CC_MODE (CCGOC);
  63 CC_MODE (CCNO);
  64 CC_MODE (CCA);
  65 CC_MODE (CCC);
  66 CC_MODE (CCO);
  67 CC_MODE (CCS);
  68 CC_MODE (CCZ);
  69 CC_MODE (CCFP);
  70 CC_MODE (CCFPU);
  71
  72 /* Vector modes.  Note that VEC_CONCAT patterns require vector
  73    sizes twice as big as implemented in hardware.  */
  74 VECTOR_MODES (INT, 4);        /*              V4QI V2HI */
  75 VECTOR_MODES (INT, 8);        /*         V8QI V4HI V2SI */
  76 VECTOR_MODES (INT, 16);       /*   V16QI V8HI V4SI V2DI */
  77 VECTOR_MODES (INT, 32);       /*  V32QI V16HI V8SI V4DI */
  78 VECTOR_MODES (INT, 64);       /* V64QI V32HI V16SI V8DI */
  79 VECTOR_MODES (INT, 128);      /* V128QI V64HI V32SI V16DI */
  80 VECTOR_MODES (FLOAT, 8);      /*              V4HF V2SF */
  81 VECTOR_MODES (FLOAT, 16);     /*         V8HF V4SF V2DF */
  82 VECTOR_MODES (FLOAT, 32);     /*        V16HF V8SF V4DF */
  83 VECTOR_MODES (FLOAT, 64);     /*       V32HF V16SF V8DF */
  84 VECTOR_MODES (FLOAT, 128);    /*      V64HF V32SF V16DF */
  85 VECTOR_MODE (INT, TI, 1);     /*                   V1TI */
  86 VECTOR_MODE (INT, DI, 1);     /*                   V1DI */
  87 VECTOR_MODE (INT, SI, 1);     /*                   V1SI */
  88 VECTOR_MODE (INT, QI, 2);     /*                   V2QI */
  89 VECTOR_MODE (INT, QI, 12);    /*                  V12QI */
  90 VECTOR_MODE (INT, QI, 14);    /*                  V14QI */
  91 VECTOR_MODE (INT, HI, 6);     /*                   V6HI */
  92
  93 INT_MODE (OI, 32);
  94 INT_MODE (XI, 64);
  95
  96 /* Keep the OI and XI modes from confusing the compiler into thinking
  97    that these modes could actually be used for computation.  They are
  98    only holders for vectors during data movement.  */
  99 #define MAX_BITSIZE_MODE_ANY_INT (128)
 100
 101 /* The symbol Pmode stands for one of the above machine modes (usually SImode).
 102    The tm.h file specifies which one.  It is not a distinct mode.  */