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

	* config/tc-i386.h (processor_type): New.
	(arch_entry): Add type.

	* config/tc-i386.c (cpu_arch_tune): New.
	(cpu_arch_tune_flags): Likewise.
	(cpu_arch_isa_flags): Likewise.
	(cpu_arch): Updated.
	(set_cpu_arch): Also update cpu_arch_isa_flags.
	(md_assemble): Update cpu_arch_isa_flags.
	(OPTION_MARCH): New.
	(OPTION_MTUNE): Likewise.
	(md_longopts): Add -march= and -mtune=.
	(md_parse_option): Support -march= and -mtune=.
	(md_show_usage): Add -march=CPU/-mtune=CPU.
	(i386_target_format): Also update cpu_arch_isa_flags,
	cpu_arch_tune and cpu_arch_tune_flags.

	* doc/as.texinfo: Add -march=CPU/-mtune=CPU.

	* doc/c-i386.texi: Document -march=CPU/-mtune=CPU.

2 files changed, 49 insertions, 2 deletions

diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo
index afcbad7..623204b 100644
--- a/gas/doc/as.texinfo
+++ b/gas/doc/as.texinfo
@@ -296,6 +296,7 @@ gcc(1), ld(1), and the Info entries for @file{binutils} and @file{ld}.
 
 @emph{Target i386 options:}
    [@b{--32}|@b{--64}] [@b{-n}]
+   [@b{-march}=@var{CPU}] [@b{-mtune}=@var{CPU}] 
 @end ifset
 @ifset I960
 
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index 81039c4..52f3110 100644
--- 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