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[i386] Document -mmmx, -msse, and -msse2.
- To: gcc-patches at gcc dot gnu dot org
- Subject: [i386] Document -mmmx, -msse, and -msse2.
- From: Kelley Cook <Kelley dot Cook at home dot com>
- Date: Mon, 30 Apr 2001 10:48:00 -0400 (EDT)
This documents the -mmx, -msse, and -msse2 options.
This is for mainline only.
Please refer to http://gcc.gnu.org/ml/gcc-patches/2001-04/msg01303.html
for a patch regarding elminating these options on the branch.
Kelley Cook <no check-in privileges>
2001-04-30 15:33:00 2001 Kelley Cook <kelley.cook@home.com>
* invoke.texi: Document -mmx, -msse, msse2
--- invoke.texi.orig Mon Apr 30 11:29:30 2001
+++ invoke.texi Mon Apr 30 11:22:21 2001
@@ -6713,6 +6713,23 @@
As of revision 2.6.1, these instructions are not generated unless you
also use the @samp{-funsafe-math-optimizations} switch.
+@item -mmmx
+@itemx -mno-mmx
+Allow the compiler to use MMX opcodes and registers. These vectorized
+integer instructions were originally introduced with the Pentium II.
+
+@item -msse
+@itemx -mno-sse
+Allow the compiler to use SSE opcodes and registers. These vectorized
+integer and single precision floating point opcodes were originally
+introduced with the Pentium III. This option implies @samp{-mmmx}.
+
+@item -msse2
+@itemx -mno-sse2
+Allow the compiler to use SSE2 opcodes and registers. These vectorized
+double precision opcodes were originally introduced with the Pentium 4.
+This option implies @samp{-mmmx} and @samp{-msse}.
+
@item -malign-double
@itemx -mno-align-double
Control whether GCC aligns @code{double}, @code{long double}, and