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author | Victoria Mixon <victoria@cygnus> | 1995-11-10 19:28:36 +0000 |
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committer | Victoria Mixon <victoria@cygnus> | 1995-11-10 19:28:36 +0000 |
commit | 0e6886424144485e224723036e2ff8027442e6dc (patch) | |
tree | 05db557eb2347ebb5139d2eaaf8cdd436ed5c7ec /gas/doc/c-sparc.texi | |
parent | b94ff92428b88d8315005a5ee956845ddf8d51a3 (diff) | |
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references to pesch@cygnus.com changed to doc@cygnus.com
Diffstat (limited to 'gas/doc/c-sparc.texi')
-rw-r--r-- | gas/doc/c-sparc.texi | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/gas/doc/c-sparc.texi b/gas/doc/c-sparc.texi new file mode 100644 index 0000000..ae979a9 --- /dev/null +++ b/gas/doc/c-sparc.texi @@ -0,0 +1,122 @@ +@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 + |