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5 Commits

Author SHA1 Message Date
Dale Johannesen
0488fb649a Massive rewrite of MMX: 
The x86_mmx type is used for MMX intrinsics, parameters and
return values where these use MMX registers, and is also
supported in load, store, and bitcast.

Only the above operations generate MMX instructions, and optimizations
do not operate on or produce MMX intrinsics. 

MMX-sized vectors <2 x i32> etc. are lowered to XMM or split into
smaller pieces.  Optimizations may occur on these forms and the
result casted back to x86_mmx, provided the result feeds into a
previous existing x86_mmx operation.

The point of all this is prevent optimizations from introducing
MMX operations, which is unsafe due to the EMMS problem.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115243 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-09-30 23:57:10 +00:00
Dan Gohman
36a0947820 Eliminate more uses of llvm-as and llvm-dis. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81290 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-08 23:54:48 +00:00
Bill Wendling
93888428d4 Allow a GR64 to be moved into an MMX register via the "movd" instruction. 
Still need to have JIT generate this code.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37863 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-07-04 00:19:54 +00:00
Bill Wendling
521d5c72ac XFAILing until I can fix properly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37618 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-16 23:57:51 +00:00
Bill Wendling
0c5c8d8f54 Testcase for MMX int to MMX register failure. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37612 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-06-16 06:31:47 +00:00