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authorVictoria Mixon <victoria@cygnus>1995-11-10 19:28:36 +0000
committerVictoria Mixon <victoria@cygnus>1995-11-10 19:28:36 +0000
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+@c Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+@c This is part of the GAS manual.
+@c For copying conditions, see the file as.texinfo.
+@ifset GENERIC
+@page
+@node Sparc-Dependent
+@chapter SPARC Dependent Features
+@end ifset
+@ifclear GENERIC
+@node Machine Dependencies
+@chapter SPARC Dependent Features
+@end ifclear
+
+@cindex SPARC support
+@menu
+* Sparc-Opts:: Options
+* Sparc-Float:: Floating Point
+* Sparc-Directives:: Sparc Machine Directives
+@end menu
+
+@node Sparc-Opts
+@section Options
+
+@cindex options for SPARC
+@cindex SPARC options
+@cindex architectures, SPARC
+@cindex SPARC architectures
+The SPARC chip family includes several successive levels (or other
+variants) of chip, using the same core instruction set, but including
+a few additional instructions at each level.
+
+By default, @code{@value{AS}} assumes the core instruction set (SPARC
+v6), but ``bumps'' the architecture level as needed: it switches to
+successively higher architectures as it encounters instructions that
+only exist in the higher levels.
+
+@table @code
+@kindex -Av6
+@kindex Av7
+@kindex -Av8
+@kindex -Av9
+@kindex -Asparclite
+@item -Av6 | -Av7 | -Av8 | -Av9 | -Asparclite
+Use one of the @samp{-A} options to select one of the SPARC
+architectures explicitly. If you select an architecture explicitly,
+@code{@value{AS}} reports a fatal error if it encounters an instruction
+or feature requiring a higher level.
+
+@item -bump
+Permit the assembler to ``bump'' the architecture level as required, but
+warn whenever it is necessary to switch to another level.
+@end table
+
+@ignore
+@c FIXME: (sparc) Fill in "syntax" section!
+@c subsection syntax
+I don't know anything about Sparc syntax. Someone who does
+will have to write this section.
+@end ignore
+
+@node Sparc-Float
+@section Floating Point
+
+@cindex floating point, SPARC (@sc{ieee})
+@cindex SPARC floating point (@sc{ieee})
+The Sparc uses @sc{ieee} floating-point numbers.
+
+@node Sparc-Directives
+@section Sparc Machine Directives
+
+@cindex SPARC machine directives
+@cindex machine directives, SPARC
+The Sparc version of @code{@value{AS}} supports the following additional
+machine directives:
+
+@table @code
+@cindex @code{align} directive, SPARC
+@item .align
+This must be followed by the desired alignment in bytes.
+
+@cindex @code{common} directive, SPARC
+@item .common
+This must be followed by a symbol name, a positive number, and
+@code{"bss"}. This behaves somewhat like @code{.comm}, but the
+syntax is different.
+
+@cindex @code{half} directive, SPARC
+@item .half
+This is functionally identical to @code{.short}.
+
+@cindex @code{proc} directive, SPARC
+@item .proc
+This directive is ignored. Any text following it on the same
+line is also ignored.
+
+@cindex @code{reserve} directive, SPARC
+@item .reserve
+This must be followed by a symbol name, a positive number, and
+@code{"bss"}. This behaves somewhat like @code{.lcomm}, but the
+syntax is different.
+
+@cindex @code{seg} directive, SPARC
+@item .seg
+This must be followed by @code{"text"}, @code{"data"}, or
+@code{"data1"}. It behaves like @code{.text}, @code{.data}, or
+@code{.data 1}.
+
+@cindex @code{skip} directive, SPARC
+@item .skip
+This is functionally identical to the @code{.space} directive.
+
+@cindex @code{word} directive, SPARC
+@item .word
+On the Sparc, the @code{.word} directive produces 32 bit values,
+instead of the 16 bit values it produces on many other machines.
+
+@cindex @code{xword} directive, SPARC
+@item .xword
+On the Sparc V9 processor, the @code{.xword} directive produces
+64 bit values.
+@end table
+