@table @code
@item -mcpu=@var{cpu type}
Assume the defaults for the machine type @var{cpu type} when scheduling
-instructions. The choices for @var{cpu type} are: @samp{i386},
-@samp{i486}, @samp{i586} (@samp{pentium}), @samp{pentium}, @samp{i686}
-(@samp{pentiumpro}) and @samp{pentiumpro}. While picking a specific
-@var{cpu type} will schedule things appropriately for that particular
-chip, the compiler will not generate any code that does not run on the
-i386 without the @samp{-march=@var{cpu type}} option being used.
+instructions. The choices for @var{cpu type} are:
+
+@multitable @columnfractions .20 .20 .20 .20
+@item @samp{i386} @tab @samp{i486} @tab @samp{i586} @tab @samp{i686}
+@item @samp{pentium} @tab @samp{pentiumpro} @tab @samp{k6}
+@end multitable
+
+While picking a specific @var{cpu type} will schedule things appropriately
+for that particular chip, the compiler will not generate any code that
+does not run on the i386 without the @samp{-march=@var{cpu type}} option
+being used.
@item -march=@var{cpu type}
Generate instructions for the machine type @var{cpu type}. The choices
-for @var{cpu type} are: @samp{i386}, @samp{i486}, @samp{pentium}, and
-@samp{pentiumpro}. Specifying @samp{-march=@var{cpu type}} implies
-@samp{-mcpu=@var{cpu type}}.
+for @var{cpu type} are the same as for @samp{-mcpu}. Moreover,
+specifying @samp{-march=@var{cpu type}} implies @samp{-mcpu=@var{cpu type}}.
@item -m386
@itemx -m486
@itemx -mpentium
@itemx -mpentiumpro
Synonyms for -mcpu=i386, -mcpu=i486, -mcpu=pentium, and -mcpu=pentiumpro
-respectively.
+respectively. These synonyms are depricated.
@item -mieee-fp
@itemx -mno-ieee-fp