diff options
Diffstat (limited to 'gas/doc')
| -rw-r--r-- | gas/doc/as.texinfo | 1 | ||||
| -rw-r--r-- | gas/doc/c-i386.texi | 50 |
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 |