gcc/config/arm/arm-modes.def

   1 /* Definitions of target machine for GNU compiler, for ARM.
   2    Copyright (C) 2002-2019 Free Software Foundation, Inc.
   3    Contributed by Pieter `Tiggr' Schoenmakers (rcpieter@win.tue.nl)
   4    and Martin Simmons (@harleqn.co.uk).
   5    More major hacks by Richard Earnshaw (rearnsha@arm.com)
   6    Minor hacks by Nick Clifton (nickc@cygnus.com)
   7
   8    This file is part of GCC.
   9
  10    GCC is free software; you can redistribute it and/or modify it
  11    under the terms of the GNU General Public License as published
  12    by the Free Software Foundation; either version 3, or (at your
  13    option) any later version.
  14
  15    GCC is distributed in the hope that it will be useful, but WITHOUT
  16    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  17    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  18    License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with GCC; see the file COPYING3.  If not see
  22    <http://www.gnu.org/licenses/>.  */
  23
  24
  25 /* Half-precision floating point */
  26 FLOAT_MODE (HF, 2, 0);
  27 ADJUST_FLOAT_FORMAT (HF, ((arm_fp16_format == ARM_FP16_FORMAT_ALTERNATIVE)
  28                           ? &arm_half_format : &ieee_half_format));
  29
  30 /* CCFPEmode should be used with floating inequalities,
  31    CCFPmode should be used with floating equalities.
  32    CC_NOOVmode should be used with SImode integer equalities.
  33    CC_Zmode should be used if only the Z flag is set correctly
  34    CC_Cmode should be used if only the C flag is set correctly, after an
  35      addition.
  36    CC_Nmode should be used if only the N (sign) flag is set correctly
  37    CC_NVmode should be used if only the N and V bits are set correctly,
  38      (used for signed comparisons when the carry is propagated in).
  39    CC_CZmode should be used if only the C and Z flags are correct
  40    (used for DImode unsigned comparisons).
  41    CC_RSBmode should be used where the comparison is set by an RSB immediate,
  42      or NEG instruction.  The form of the comparison for (const - reg) will
  43      be (COMPARE (not (reg)) (~const)).
  44    CC_NCVmode should be used if only the N, C, and V flags are correct
  45    CC_Bmode should be used if only the C flag is correct after a subtract
  46      (eg after an unsigned borrow with carry-in propagation).
  47    (used for DImode signed comparisons).
  48    CCmode should be used otherwise.  */
  49
  50 CC_MODE (CC_NOOV);
  51 CC_MODE (CC_Z);
  52 CC_MODE (CC_CZ);
  53 CC_MODE (CC_NCV);
  54 CC_MODE (CC_NV);
  55 CC_MODE (CC_SWP);
  56 CC_MODE (CC_RSB);
  57 CC_MODE (CCFP);
  58 CC_MODE (CCFPE);
  59 CC_MODE (CC_DNE);
  60 CC_MODE (CC_DEQ);
  61 CC_MODE (CC_DLE);
  62 CC_MODE (CC_DLT);
  63 CC_MODE (CC_DGE);
  64 CC_MODE (CC_DGT);
  65 CC_MODE (CC_DLEU);
  66 CC_MODE (CC_DLTU);
  67 CC_MODE (CC_DGEU);
  68 CC_MODE (CC_DGTU);
  69 CC_MODE (CC_C);
  70 CC_MODE (CC_B);
  71 CC_MODE (CC_N);
  72 CC_MODE (CC_V);
  73
  74 /* Vector modes.  */
  75 VECTOR_MODES (INT, 4);        /*            V4QI V2HI */
  76 VECTOR_MODES (INT, 8);        /*       V8QI V4HI V2SI */
  77 VECTOR_MODES (INT, 16);       /* V16QI V8HI V4SI V2DI */
  78 VECTOR_MODES (FLOAT, 8);      /*            V4HF V2SF */
  79 VECTOR_MODES (FLOAT, 16);     /*       V8HF V4SF V2DF */
  80 VECTOR_MODE (FLOAT, HF, 2);   /*                 V2HF */
  81
  82 /* Fraction and accumulator vector modes.  */
  83 VECTOR_MODES (FRACT, 4);      /* V4QQ  V2HQ */
  84 VECTOR_MODES (UFRACT, 4);     /* V4UQQ V2UHQ */
  85 VECTOR_MODES (ACCUM, 4);      /*       V2HA */
  86 VECTOR_MODES (UACCUM, 4);     /*       V2UHA */
  87
  88 /* Opaque integer modes for 3, 4, 6 or 8 Neon double registers (2 is
  89    TImode).  */
  90 INT_MODE (EI, 24);
  91 INT_MODE (OI, 32);
  92 INT_MODE (CI, 48);
  93 INT_MODE (XI, 64);