2006-06-16 H.J. Lu <hongjiu.lu@intel.com>

[deliverable/binutils-gdb.git] / gas / doc / c-i386.texi

diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index 81039c4dbe72a0295670b24d2858feb5e0e6cd9d..52f3110303f5c471ed2cbd0e311562bb6fdf6928 100644 (file)
--- a/gas/doc/c-i386.texi
+++ b/gas/doc/c-i386.texi
@@ -76,6 +76,49 @@ character, which means that it cannot be used in expressions.  The
 not disable @samp{/} at the beginning of a line starting a comment, or
 affect using @samp{#} for starting a comment.
 
+@cindex @samp{-march=} option, i386
+@cindex @samp{-march=} option, x86-64
+@item -march=@var{CPU}
+This option specifies an instruction set architecture for generating
+instructions.  The following architectures are recognized:
+@code{i8086},
+@code{i186},
+@code{i286},
+@code{i386},
+@code{i486},
+@code{i586},
+@code{i686},
+@code{pentium},
+@code{pentiumpro},
+@code{pentiumii},
+@code{pentiumiii},
+@code{pentium4},
+@code{prescott},
+@code{nocona},
+@code{yonah},
+@code{merom},
+@code{k6},
+@code{k6_2},
+@code{athlon},
+@code{sledgehammer},
+@code{opteron},
+@code{k8},
+@code{generic32} and
+@code{generic64}.
+
+This option only affects instructions generated by the assembler. The
+@code{.arch} directive will take precedent.
+
+@cindex @samp{-mtune=} option, i386
+@cindex @samp{-mtune=} option, x86-64
+@item -mtune=@var{CPU}
+This option specifies a processor to optimize for. When used in
+conjunction with the @option{-march} option, only instructions
+of the processor specified by the @option{-march} option will be
+generated.
+
+Valid @var{CPU} values are identical to @option{-march=@var{CPU}}.
+
 @end table
 
 @node i386-Syntax
@@ -709,8 +752,11 @@ supported on the CPU specified.  The choices for @var{cpu_type} are:
 @item @samp{i8086} @tab @samp{i186} @tab @samp{i286} @tab @samp{i386}
 @item @samp{i486} @tab @samp{i586} @tab @samp{i686} @tab @samp{pentium}
 @item @samp{pentiumpro} @tab @samp{pentiumii} @tab @samp{pentiumiii} @tab @samp{pentium4}
-@item @samp{k6} @tab @samp{athlon} @samp{sledgehammer}
-@item @samp{.mmx} @samp{.sse} @samp{.sse2} @samp{.sse3} @samp{.3dnow}
+@item @samp{prescott} @tab @samp{nocona} @tab @samp{yonah} @tab @samp{merom}
+@item @samp{k6} @tab @samp{athlon} @tab @samp{sledgehammer} @tab @samp{k8} 
+@item @samp{.mmx} @tab @samp{.sse} @tab @samp{.sse2} @tab @samp{.sse3}
+@item @samp{.3dnow} @tab @samp{.3dnowa} @tab @samp{.padlock} @tab @samp{.pacifica}
+@item @samp{.svme}
 @end multitable
 
 Apart from the warning, there are only two other effects on