gas/doc/c-m88k.texi

   1 @c Copyright 2001 Free Software Foundation, Inc.
   2 @c This is part of the GAS manual.
   3 @c For copying conditions, see the file as.texinfo.
   4 @page
   5 @node M88K-Dependent
   6 @chapter Motorola M88K Dependent Features
   7
   8 @cindex M88K support
   9 @menu
  10 * M88K Directives::     M88K Machine Directives
  11 @end menu
  12
  13 @node M88K Directives
  14 @section M88K Machine Directives
  15
  16 The M88K version of the assembler supports the following machine
  17 directives:
  18
  19 @table @code
  20 @cindex @code{align} directive, M88K
  21 @item .align
  22 This directive aligns the section program counter on the next 4-byte
  23 boundary.
  24
  25 @cindex @code{dfloat} directive, M88K
  26 @item .dfloat @var{expr}
  27 This assembles a double precision (64-bit) floating point constant.
  28
  29 @cindex @code{ffloat} directive, M88K
  30 @item .ffloat @var{expr}
  31 This assembles a single precision (32-bit) floating point constant.
  32
  33 @cindex @code{half} directive, M88K
  34 @item .half @var{expr}
  35 This directive assembles a half-word (16-bit) constant.
  36
  37 @cindex @code{word} directive, M88K
  38 @item .word @var{expr}
  39 This assembles a word (32-bit) constant.
  40
  41 @cindex @code{string} directive, M88K
  42 @item .string "@var{str}"
  43 This directive behaves like the standard @code{.ascii} directive for
  44 copying @var{str} into the object file.  The string is not terminated
  45 with a null byte.
  46
  47 @cindex @code{set} directive, M88K
  48 @item .set @var{symbol}, @var{value}
  49 This directive creates a symbol named @var{symbol} which is an alias for
  50 another symbol (possibly not yet defined).  This should not be confused
  51 with the mnemonic @code{set}, which is a legitimate M88K instruction.
  52
  53 @cindex @code{def} directive, M88K
  54 @item .def @var{symbol}, @var{value}
  55 This directive is synonymous with @code{.set} and is presumably provided
  56 for compatibility with other M88K assemblers.
  57
  58 @cindex @code{bss} directive, M88K
  59 @item .bss @var{symbol}, @var{length}, @var{align}
  60 Reserve @var{length} bytes in the bss section for a local @var{symbol},
  61 aligned to the power of two specified by @var{align}.  @var{length} and
  62 @var{align} must be positive absolute expressions.  This directive
  63 differs from @samp{.lcomm} only in that it permits you to specify
  64 an alignment.  @xref{Lcomm,,@code{.lcomm}}.
  65
  66 @end table