gas/doc/c-sparc.texi

   1 @c Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
   2 @c This is part of the GAS manual.
   3 @c For copying conditions, see the file as.texinfo.
   4 @ifset GENERIC
   5 @page
   6 @node Sparc-Dependent
   7 @chapter SPARC Dependent Features
   8 @end ifset
   9 @ifclear GENERIC
  10 @node Machine Dependencies
  11 @chapter SPARC Dependent Features
  12 @end ifclear
  13
  14 @cindex SPARC support
  15 @menu
  16 * Sparc-Opts::                  Options
  17 * Sparc-Float::                 Floating Point
  18 * Sparc-Directives::            Sparc Machine Directives
  19 @end menu
  20
  21 @node Sparc-Opts
  22 @section Options
  23
  24 @cindex options for SPARC
  25 @cindex SPARC options
  26 @cindex architectures, SPARC
  27 @cindex SPARC architectures
  28 The SPARC chip family includes several successive levels (or other
  29 variants) of chip, using the same core instruction set, but including
  30 a few additional instructions at each level.
  31
  32 By default, @code{@value{AS}} assumes the core instruction set (SPARC
  33 v6), but ``bumps'' the architecture level as needed: it switches to
  34 successively higher architectures as it encounters instructions that
  35 only exist in the higher levels.
  36
  37 @table @code
  38 @kindex -Av6
  39 @kindex Av7
  40 @kindex -Av8
  41 @kindex -Av9
  42 @kindex -Asparclite
  43 @item -Av6 | -Av7 | -Av8 | -Av9 | -Asparclite
  44 Use one of the @samp{-A} options to select one of the SPARC
  45 architectures explicitly.  If you select an architecture explicitly,
  46 @code{@value{AS}} reports a fatal error if it encounters an instruction
  47 or feature requiring a higher level.
  48
  49 @item -bump
  50 Permit the assembler to ``bump'' the architecture level as required, but
  51 warn whenever it is necessary to switch to another level.
  52 @end table
  53
  54 @ignore
  55 @c FIXME: (sparc) Fill in "syntax" section!
  56 @c subsection syntax
  57 I don't know anything about Sparc syntax.  Someone who does
  58 will have to write this section.
  59 @end ignore
  60
  61 @node Sparc-Float
  62 @section Floating Point
  63
  64 @cindex floating point, SPARC (@sc{ieee})
  65 @cindex SPARC floating point (@sc{ieee})
  66 The Sparc uses @sc{ieee} floating-point numbers.
  67
  68 @node Sparc-Directives
  69 @section Sparc Machine Directives
  70
  71 @cindex SPARC machine directives
  72 @cindex machine directives, SPARC
  73 The Sparc version of @code{@value{AS}} supports the following additional
  74 machine directives:
  75
  76 @table @code
  77 @cindex @code{align} directive, SPARC
  78 @item .align
  79 This must be followed by the desired alignment in bytes.
  80
  81 @cindex @code{common} directive, SPARC
  82 @item .common
  83 This must be followed by a symbol name, a positive number, and
  84 @code{"bss"}.  This behaves somewhat like @code{.comm}, but the
  85 syntax is different.
  86
  87 @cindex @code{half} directive, SPARC
  88 @item .half
  89 This is functionally identical to @code{.short}.
  90
  91 @cindex @code{proc} directive, SPARC
  92 @item .proc
  93 This directive is ignored.  Any text following it on the same
  94 line is also ignored.
  95
  96 @cindex @code{reserve} directive, SPARC
  97 @item .reserve
  98 This must be followed by a symbol name, a positive number, and
  99 @code{"bss"}.  This behaves somewhat like @code{.lcomm}, but the
 100 syntax is different.
 101
 102 @cindex @code{seg} directive, SPARC
 103 @item .seg
 104 This must be followed by @code{"text"}, @code{"data"}, or
 105 @code{"data1"}.  It behaves like @code{.text}, @code{.data}, or
 106 @code{.data 1}.
 107
 108 @cindex @code{skip} directive, SPARC
 109 @item .skip
 110 This is functionally identical to the @code{.space} directive.
 111
 112 @cindex @code{word} directive, SPARC
 113 @item .word
 114 On the Sparc, the @code{.word} directive produces 32 bit values,
 115 instead of the 16 bit values it produces on many other machines.
 116
 117 @cindex @code{xword} directive, SPARC
 118 @item .xword
 119 On the Sparc V9 processor, the @code{.xword} directive produces
 120 64 bit values.
 121 @end table
 122