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| author | Jeff Law <law@gcc.gnu.org> | 1997-11-24 13:53:15 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1997-11-24 13:53:15 -0700 |
| commit | a9f3e1a459157e334603e505af38d4bccf50b90a (patch) | |
| tree | 8f05fcb8851b618a9b728754432b73d813986d80 /gcc | |
| parent | ef85603ebd3451280bcc9959fe7fad9c877718ab (diff) | |
| download | gcc-a9f3e1a459157e334603e505af38d4bccf50b90a.zip gcc-a9f3e1a459157e334603e505af38d4bccf50b90a.tar.gz gcc-a9f3e1a459157e334603e505af38d4bccf50b90a.tar.bz2 | |
Doc fixes from stan.
From-SVN: r16691
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/invoke.texi | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/gcc/invoke.texi b/gcc/invoke.texi index 1880143..cf1c8a5 100644 --- a/gcc/invoke.texi +++ b/gcc/invoke.texi @@ -306,7 +306,9 @@ in the following sections. -mstats -EL -EB -G @var{num} -nocpp @emph{i386 Options} --m486 -m386 -mieee-fp -mno-fancy-math-387 +-mcpu=@var{cpu type} +-march=@var{cpu type} +-mieee-fp -mno-fancy-math-387 -mno-fp-ret-in-387 -msoft-float -msvr3-shlib -mno-wide-multiply -mrtd -malign-double -mreg-alloc=@var{list} -mregparm=@var{num} @@ -4516,11 +4518,27 @@ defaults. These @samp{-m} options are defined for the i386 family of computers: -@table @code -@item -m486 -@itemx -m386 -Control whether or not code is optimized for a 486 instead of an -386. Code generated for an 486 will run on a 386 and vice versa. +@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. + +@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}}. + +@item -m386 +@itemx -m486 +@itemx -mpentium +@itemx -mpentiumpro +Synonyms for -mcpu=i386, -mcpu=i486, -mcpu=pentium, and -mcpu=pentiumpro +respectively. @item -mieee-fp @itemx -mno-ieee-fp |