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