67 lines
2.1 KiB
Text
67 lines
2.1 KiB
Text
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@c Copyright 2001 Free Software Foundation, Inc.
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@c This is part of the GAS manual.
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@c For copying conditions, see the file as.texinfo.
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@page
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@node M88K-Dependent
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@chapter Motorola M88K Dependent Features
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@cindex M88K support
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@menu
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* M88K Directives:: M88K Machine Directives
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@end menu
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@node M88K Directives
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@section M88K Machine Directives
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The M88K version of the assembler supports the following machine
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directives:
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@table @code
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@cindex @code{align} directive, M88K
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@item .align
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This directive aligns the section program counter on the next 4-byte
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boundary.
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@cindex @code{dfloat} directive, M88K
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@item .dfloat @var{expr}
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This assembles a double precision (64-bit) floating point constant.
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@cindex @code{ffloat} directive, M88K
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@item .ffloat @var{expr}
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This assembles a single precision (32-bit) floating point constant.
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@cindex @code{half} directive, M88K
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@item .half @var{expr}
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This directive assembles a half-word (16-bit) constant.
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@cindex @code{word} directive, M88K
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@item .word @var{expr}
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This assembles a word (32-bit) constant.
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@cindex @code{string} directive, M88K
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@item .string "@var{str}"
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This directive behaves like the standard @code{.ascii} directive for
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copying @var{str} into the object file. The string is not terminated
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with a null byte.
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@cindex @code{set} directive, M88K
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@item .set @var{symbol}, @var{value}
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This directive creates a symbol named @var{symbol} which is an alias for
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another symbol (possibly not yet defined). This should not be confused
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with the mnemonic @code{set}, which is a legitimate M88K instruction.
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@cindex @code{def} directive, M88K
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@item .def @var{symbol}, @var{value}
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This directive is synonymous with @code{.set} and is presumably provided
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for compatibility with other M88K assemblers.
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@cindex @code{bss} directive, M88K
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@item .bss @var{symbol}, @var{length}, @var{align}
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Reserve @var{length} bytes in the bss section for a local @var{symbol},
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aligned to the power of two specified by @var{align}. @var{length} and
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@var{align} must be positive absolute expressions. This directive
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differs from @samp{.lcomm} only in that it permits you to specify
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an alignment. @xref{Lcomm,,@code{.lcomm}}.
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@end table
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