gcc/doc/gcc/gcc-command-options/machine-dependent-options/mcore-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:: MCore
   7
   8 .. index:: MCore options
   9
  10 .. _mcore-options:
  11
  12 MCore Options
  13 ^^^^^^^^^^^^^
  14
  15 These are the :samp:`-m` options defined for the Motorola M\*Core
  16 processors.
  17
  18 .. option:: -mhardlit, -mno-hardlit
  19
  20   Inline constants into the code stream if it can be done in two
  21   instructions or less.
  22
  23 .. option:: -mdiv, -mno-div
  24
  25   Use the divide instruction.  (Enabled by default).
  26
  27 .. option:: -mrelax-immediate, -mno-relax-immediate
  28
  29   Allow arbitrary-sized immediates in bit operations.
  30
  31 .. option:: -mwide-bitfields, -mno-wide-bitfields
  32
  33   Always treat bit-fields as ``int`` -sized.
  34
  35 .. option:: -m4byte-functions, -mno-4byte-functions
  36
  37   Force all functions to be aligned to a 4-byte boundary.
  38
  39 .. option:: -mcallgraph-data, -mno-callgraph-data
  40
  41   Emit callgraph information.
  42
  43 .. option:: -mslow-bytes, -mno-slow-bytes
  44
  45   Prefer word access when reading byte quantities.
  46
  47 .. option:: -mlittle-endian, -mbig-endian
  48
  49   Generate code for a little-endian target.
  50
  51 .. option:: -m210, -m340
  52
  53   Generate code for the 210 processor.
  54
  55 .. option:: -mno-lsim
  56
  57   Assume that runtime support has been provided and so omit the
  58   simulator library (:samp:`libsim.a)` from the linker command line.
  59
  60 .. option:: -mstack-increment={size}
  61
  62   Set the maximum amount for a single stack increment operation.  Large
  63   values can increase the speed of programs that contain functions
  64   that need a large amount of stack space, but they can also trigger a
  65   segmentation fault if the stack is extended too much.  The default
  66   value is 0x1000.