gcc/poly-int-types.h

   1 /* Typedefs for polynomial integers used in GCC.
   2    Copyright (C) 2016-2018 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 it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 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 #ifndef HAVE_POLY_INT_TYPES_H
  21 #define HAVE_POLY_INT_TYPES_H
  22
  23 typedef poly_int_pod<NUM_POLY_INT_COEFFS, unsigned short> poly_uint16_pod;
  24 typedef poly_int_pod<NUM_POLY_INT_COEFFS, HOST_WIDE_INT> poly_int64_pod;
  25 typedef poly_int_pod<NUM_POLY_INT_COEFFS,
  26                      unsigned HOST_WIDE_INT> poly_uint64_pod;
  27 typedef poly_int_pod<NUM_POLY_INT_COEFFS, offset_int> poly_offset_int_pod;
  28 typedef poly_int_pod<NUM_POLY_INT_COEFFS, wide_int> poly_wide_int_pod;
  29 typedef poly_int_pod<NUM_POLY_INT_COEFFS, widest_int> poly_widest_int_pod;
  30
  31 typedef poly_int<NUM_POLY_INT_COEFFS, unsigned short> poly_uint16;
  32 typedef poly_int<NUM_POLY_INT_COEFFS, HOST_WIDE_INT> poly_int64;
  33 typedef poly_int<NUM_POLY_INT_COEFFS, unsigned HOST_WIDE_INT> poly_uint64;
  34 typedef poly_int<NUM_POLY_INT_COEFFS, offset_int> poly_offset_int;
  35 typedef poly_int<NUM_POLY_INT_COEFFS, wide_int> poly_wide_int;
  36 typedef poly_int<NUM_POLY_INT_COEFFS, wide_int_ref> poly_wide_int_ref;
  37 typedef poly_int<NUM_POLY_INT_COEFFS, widest_int> poly_widest_int;
  38
  39 /* Divide bit quantity X by BITS_PER_UNIT and round down (towards -Inf).
  40    If X is a bit size, this gives the number of whole bytes spanned by X.
  41
  42    This is safe because non-constant mode sizes must be a whole number
  43    of bytes in size.  */
  44 #define bits_to_bytes_round_down(X) force_align_down_and_div (X, BITS_PER_UNIT)
  45
  46 /* Divide bit quantity X by BITS_PER_UNIT and round up (towards +Inf).
  47    If X is a bit size, this gives the number of whole or partial bytes
  48    spanned by X.
  49
  50    This is safe because non-constant mode sizes must be a whole number
  51    of bytes in size.  */
  52 #define bits_to_bytes_round_up(X) force_align_up_and_div (X, BITS_PER_UNIT)
  53
  54 /* Return the number of bits in bit quantity X that do not belong to
  55    whole bytes.  This is equivalent to:
  56
  57        X - bits_to_bytes_round_down (X) * BITS_PER_UNIT
  58
  59    This is safe because non-constant mode sizes must be a whole number
  60    of bytes in size.  */
  61 #define num_trailing_bits(X) force_get_misalignment (X, BITS_PER_UNIT)
  62
  63 /* Round bit quantity X down to the nearest byte boundary.
  64
  65    This is safe because non-constant mode sizes must be a whole number
  66    of bytes in size.  */
  67 #define round_down_to_byte_boundary(X) force_align_down (X, BITS_PER_UNIT)
  68
  69 /* Round bit quantity X up the nearest byte boundary.
  70
  71    This is safe because non-constant mode sizes must be a whole number
  72    of bytes in size.  */
  73 #define round_up_to_byte_boundary(X) force_align_up (X, BITS_PER_UNIT)
  74
  75 /* Return the size of an element in a vector of size SIZE, given that
  76    the vector has NELTS elements.  The return value is in the same units
  77    as SIZE (either bits or bytes).
  78
  79    to_constant () is safe in this situation because vector elements are
  80    always constant-sized scalars.  */
  81 #define vector_element_size(SIZE, NELTS) \
  82   (exact_div (SIZE, NELTS).to_constant ())
  83
  84 /* Wrapper for poly_int arguments to target macros, so that if a target
  85    doesn't need polynomial-sized modes, its header file can continue to
  86    treat the argument as a normal constant.  This should go away once
  87    macros are moved to target hooks.  It shouldn't be used in other
  88    contexts.  */
  89 #if NUM_POLY_INT_COEFFS == 1
  90 #define MACRO_INT(X) ((X).to_constant ())
  91 #else
  92 #define MACRO_INT(X) (X)
  93 #endif
  94
  95 #endif