1*d2201f2fSdrahn@c Copyright 2001 Free Software Foundation, Inc. 2*d2201f2fSdrahn@c This is part of the GAS manual. 3*d2201f2fSdrahn@c For copying conditions, see the file as.texinfo. 4*d2201f2fSdrahn@page 5*d2201f2fSdrahn@node M88K-Dependent 6*d2201f2fSdrahn@chapter Motorola M88K Dependent Features 7*d2201f2fSdrahn 8*d2201f2fSdrahn@cindex M88K support 9*d2201f2fSdrahn@menu 10*d2201f2fSdrahn* M88K Directives:: M88K Machine Directives 11*d2201f2fSdrahn@end menu 12*d2201f2fSdrahn 13*d2201f2fSdrahn@node M88K Directives 14*d2201f2fSdrahn@section M88K Machine Directives 15*d2201f2fSdrahn 16*d2201f2fSdrahnThe M88K version of the assembler supports the following machine 17*d2201f2fSdrahndirectives: 18*d2201f2fSdrahn 19*d2201f2fSdrahn@table @code 20*d2201f2fSdrahn@cindex @code{align} directive, M88K 21*d2201f2fSdrahn@item .align 22*d2201f2fSdrahnThis directive aligns the section program counter on the next 4-byte 23*d2201f2fSdrahnboundary. 24*d2201f2fSdrahn 25*d2201f2fSdrahn@cindex @code{dfloat} directive, M88K 26*d2201f2fSdrahn@item .dfloat @var{expr} 27*d2201f2fSdrahnThis assembles a double precision (64-bit) floating point constant. 28*d2201f2fSdrahn 29*d2201f2fSdrahn@cindex @code{ffloat} directive, M88K 30*d2201f2fSdrahn@item .ffloat @var{expr} 31*d2201f2fSdrahnThis assembles a single precision (32-bit) floating point constant. 32*d2201f2fSdrahn 33*d2201f2fSdrahn@cindex @code{half} directive, M88K 34*d2201f2fSdrahn@item .half @var{expr} 35*d2201f2fSdrahnThis directive assembles a half-word (16-bit) constant. 36*d2201f2fSdrahn 37*d2201f2fSdrahn@cindex @code{word} directive, M88K 38*d2201f2fSdrahn@item .word @var{expr} 39*d2201f2fSdrahnThis assembles a word (32-bit) constant. 40*d2201f2fSdrahn 41*d2201f2fSdrahn@cindex @code{string} directive, M88K 42*d2201f2fSdrahn@item .string "@var{str}" 43*d2201f2fSdrahnThis directive behaves like the standard @code{.ascii} directive for 44*d2201f2fSdrahncopying @var{str} into the object file. The string is not terminated 45*d2201f2fSdrahnwith a null byte. 46*d2201f2fSdrahn 47*d2201f2fSdrahn@cindex @code{set} directive, M88K 48*d2201f2fSdrahn@item .set @var{symbol}, @var{value} 49*d2201f2fSdrahnThis directive creates a symbol named @var{symbol} which is an alias for 50*d2201f2fSdrahnanother symbol (possibly not yet defined). This should not be confused 51*d2201f2fSdrahnwith the mnemonic @code{set}, which is a legitimate M88K instruction. 52*d2201f2fSdrahn 53*d2201f2fSdrahn@cindex @code{def} directive, M88K 54*d2201f2fSdrahn@item .def @var{symbol}, @var{value} 55*d2201f2fSdrahnThis directive is synonymous with @code{.set} and is presumably provided 56*d2201f2fSdrahnfor compatibility with other M88K assemblers. 57*d2201f2fSdrahn 58*d2201f2fSdrahn@cindex @code{bss} directive, M88K 59*d2201f2fSdrahn@item .bss @var{symbol}, @var{length}, @var{align} 60*d2201f2fSdrahnReserve @var{length} bytes in the bss section for a local @var{symbol}, 61*d2201f2fSdrahnaligned to the power of two specified by @var{align}. @var{length} and 62*d2201f2fSdrahn@var{align} must be positive absolute expressions. This directive 63*d2201f2fSdrahndiffers from @samp{.lcomm} only in that it permits you to specify 64*d2201f2fSdrahnan alignment. @xref{Lcomm,,@code{.lcomm}}. 65*d2201f2fSdrahn 66*d2201f2fSdrahn@end table 67