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[Bug target/38320] missed movd opcode (32bits mm -> r/m32).
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Nov 2008 11:43:45 -0000
- Subject: [Bug target/38320] missed movd opcode (32bits mm -> r/m32).
- References: <bug-38320-7667@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from ubizjak at gmail dot com 2008-11-30 11:43 -------
(In reply to comment #2)
> and what about 32-bits?
The quote from i386.c:
/* ??? This is a lie. We do have moves between mmx/general, and for
mmx/sse2. But by saying we need secondary memory we discourage the
register allocator from using the mmx registers unless needed. */
if (MMX_CLASS_P (class1) != MMX_CLASS_P (class2))
return true;
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38320