commit 20e3ed102ba0794b09a894b41254738a59eb30f4
author Evan Cheng <evan.cheng@apple.com> Mon Apr 03 22:30:54 2006 +0000
committer Evan Cheng <evan.cheng@apple.com> Mon Apr 03 22:30:54 2006 +0000
tree ac3d190990e2321f4d7868fc08862c5e78b71ef9
parent 4f91a4c497fb1032550b7f163004efc5fce1d7f1

Use movlpd to: store lower f64 extracted from v2f64.
Use movhpd to: store upper f64 extracted from v2f64.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27382 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 693189b..87438d0 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -2712,6 +2712,8 @@
         return Op;
 
       // UNPCKHPD the element to the lowest double word, then movsd.
+      // Note if the lower 64 bits of the result of the UNPCKHPD is then stored
+      // to a f64mem, the whole operation is folded into a single MOVHPDmr.
       MVT::ValueType MaskVT = MVT::getIntVectorWithNumElements(4);
       std::vector<SDOperand> IdxVec;
       IdxVec.push_back(DAG.getConstant(1, MVT::getVectorBaseType(MaskVT)));

lib/Target/X86/X86InstrSSE.td

diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 5fc0004..5fc0a23 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -713,12 +713,18 @@
 def MOVLPSmr : PSI<0x13, MRMDestMem, (ops f64mem:$dst, VR128:$src),
                    "movlps {$src, $dst|$dst, $src}", []>;
 def MOVLPDmr : PDI<0x13, MRMDestMem, (ops f64mem:$dst, VR128:$src),
-                   "movlpd {$src, $dst|$dst, $src}", []>;
+                   "movlpd {$src, $dst|$dst, $src}",
+                   [(store (f64 (vector_extract (v2f64 VR128:$src),
+                                 (i32 0))), addr:$dst)]>;
 
 def MOVHPSmr : PSI<0x17, MRMDestMem, (ops f64mem:$dst, VR128:$src),
                    "movhps {$src, $dst|$dst, $src}", []>;
 def MOVHPDmr : PDI<0x17, MRMDestMem, (ops f64mem:$dst, VR128:$src),
-                   "movhpd {$src, $dst|$dst, $src}", []>;
+                   "movhpd {$src, $dst|$dst, $src}",
+                   [(store (f64 (vector_extract
+                                 (v2f64 (vector_shuffle VR128:$src, (undef),
+                                         UNPCKH_shuffle_mask)), (i32 0))),
+                     addr:$dst)]>;
 
 let isTwoAddress = 1 in {
 def MOVLHPSrr : PSI<0x16, MRMSrcReg, (ops VR128:$dst, VR128:$src1, VR128:$src2),
@@ -1561,10 +1567,6 @@
                      "movsd {$src, $dst|$dst, $src}",
                      [(set FR64:$dst, (vector_extract (v2f64 VR128:$src),
                                        (i32 0)))]>;
-def MOVPD2SDmr : SDI<0x10, MRMDestMem, (ops f64mem:$dst, VR128:$src),
-                     "movsd {$src, $dst|$dst, $src}",
-                     [(store (f64 (vector_extract (v2f64 VR128:$src),
-                                   (i32 0))), addr:$dst)]>;
 def MOVPDI2DIrr  : PDI<0x7E, MRMSrcReg, (ops R32:$dst, VR128:$src),
                        "movd {$src, $dst|$dst, $src}",
                        [(set R32:$dst, (vector_extract (v4i32 VR128:$src),