gcc/doc/gcc/gcc-command-options/machine-dependent-options/h8-300-options.rst

   1 ..
   2   Copyright 1988-2022 Free Software Foundation, Inc.
   3   This is part of the GCC manual.
   4   For copying conditions, see the copyright.rst file.
   5
   6 .. program:: H8/300
   7
   8 .. _h8-300-options:
   9
  10 H8/300 Options
  11 ^^^^^^^^^^^^^^
  12
  13 These :samp:`-m` options are defined for the H8/300 implementations:
  14
  15 .. option:: -mrelax
  16
  17   Shorten some address references at link time, when possible; uses the
  18   linker option :option:`-relax`.  See `Using ld <https://sourceware.org/binutils/docs/ld/H8_002f300.html>`_
  19   for a fuller description.
  20
  21 .. option:: -mh
  22
  23   Generate code for the H8/300H.
  24
  25 .. option:: -ms
  26
  27   Generate code for the H8S.
  28
  29 .. option:: -mn
  30
  31   Generate code for the H8S and H8/300H in the normal mode.  This switch
  32   must be used either with :option:`-mh` or :option:`-ms`.
  33
  34 .. option:: -ms2600
  35
  36   Generate code for the H8S/2600.  This switch must be used with :option:`-ms`.
  37
  38 .. option:: -mexr
  39
  40   Extended registers are stored on stack before execution of function
  41   with monitor attribute. Default option is :option:`-mexr`.
  42   This option is valid only for H8S targets.
  43
  44 .. option:: -mno-exr
  45
  46   Extended registers are not stored on stack before execution of function
  47   with monitor attribute. Default option is :option:`-mno-exr`.
  48   This option is valid only for H8S targets.
  49
  50 .. option:: -mexr
  51
  52   Default setting; overrides :option:`-mno-exr`.
  53
  54 .. option:: -mint32
  55
  56   Make ``int`` data 32 bits by default.
  57
  58 .. option:: -malign-300
  59
  60   On the H8/300H and H8S, use the same alignment rules as for the H8/300.
  61   The default for the H8/300H and H8S is to align longs and floats on
  62   4-byte boundaries.
  63   :option:`-malign-300` causes them to be aligned on 2-byte boundaries.
  64   This option has no effect on the H8/300.