gcc/config/pa/pa-64.h

   1 /* Definitions of target machine for GNU compiler, for HPs using the
   2    64bit runtime model.
   3    Copyright (C) 1999-2024 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* The default sizes for basic datatypes provided by GCC are not
  22    correct for the PA64 runtime architecture.
  23
  24    In PA64, basic types have the following sizes
  25
  26      char       1 byte
  27      short      2 bytes
  28      int        4 bytes
  29      long       8 bytes
  30      long long  8 bytes
  31      pointer    8 bytes
  32      float      4 bytes
  33      double     8 bytes
  34      long double 16 bytes
  35      size_t     8 bytes
  36      ptrdiff_t  8 bytes
  37      wchar      4 bytes
  38
  39   Make GCC agree with types.h.  */
  40 #undef SIZE_TYPE
  41 #define SIZE_TYPE "long unsigned int"
  42
  43 #undef PTRDIFF_TYPE
  44 #define PTRDIFF_TYPE "long int"
  45
  46 #undef WCHAR_TYPE
  47 #define WCHAR_TYPE "unsigned int"
  48
  49 #undef WCHAR_TYPE_SIZE
  50 #define WCHAR_TYPE_SIZE 32
  51
  52 /* If it is not listed here, then the default selected by GCC is OK.  */
  53 #undef SHORT_TYPE_SIZE
  54 #define SHORT_TYPE_SIZE 16
  55 #undef INT_TYPE_SIZE
  56 #define INT_TYPE_SIZE 32
  57 #undef LONG_TYPE_SIZE
  58 #define LONG_TYPE_SIZE 64
  59 #undef LONG_LONG_TYPE_SIZE
  60 #define LONG_LONG_TYPE_SIZE 64
  61 #undef FLOAT_TYPE_SIZE
  62 #define FLOAT_TYPE_SIZE 32
  63 #undef DOUBLE_TYPE_SIZE
  64 #define DOUBLE_TYPE_SIZE 64
  65 #undef LONG_DOUBLE_TYPE_SIZE
  66 #define LONG_DOUBLE_TYPE_SIZE 128
  67
  68 /* ?!? This needs to be made compile-time selectable.
  69
  70    The PA64 runtime model has arguments that grow to higher addresses
  71    (like most other targets).  The older runtime model has arguments
  72    that grow to lower addresses.  What fun.  */
  73 #undef ARGS_GROW_DOWNWARD
  74
  75 /* If defined, a C expression which determines whether the default
  76    implementation of va_arg will attempt to pad down before reading the
  77    next argument, if that argument is smaller than its aligned space as
  78    controlled by PARM_BOUNDARY.  If this macro is not defined, all such
  79    arguments are padded down when BYTES_BIG_ENDIAN is true.  We don't
  80    want aggregates padded down.  */
  81
  82 #define PAD_VARARGS_DOWN \
  83   (!AGGREGATE_TYPE_P (type) \
  84    && TREE_CODE (type) != COMPLEX_TYPE \
  85    && TREE_CODE (type) != VECTOR_TYPE)
  86
  87 /* In the PA architecture, it is not possible to directly move data
  88    between GENERAL_REGS and FP_REGS.  On the 32-bit port, we use the
  89    location at SP-16 because PA 1.X only supports 5-bit immediates for
  90    floating-point loads and stores.  We don't expose this location in
  91    the RTL to avoid scheduling related problems.  For example, the
  92    store and load could be separated by a call to a pure or const
  93    function which has no frame and this function might also use SP-16.
  94    We have 14-bit immediates on the 64-bit port, so we use secondary
  95    memory for the copies.  */
  96 #define PA_SECONDARY_MEMORY_NEEDED(MODE, CLASS1, CLASS2) \
  97   (MAYBE_FP_REG_CLASS_P (CLASS1) != FP_REG_CLASS_P (CLASS2)             \
  98    || MAYBE_FP_REG_CLASS_P (CLASS2) != FP_REG_CLASS_P (CLASS1))
  99