shuffle-adjust.diff

dan@dl360:~/applications/v8/v8$ git diff
diff --git a/src/compiler/backend/x64/code-generator-x64.cc b/src/compiler/backend/x64/code-generator-x64.cc
index 245f503f3a..f1465b839e 100644
--- a/src/compiler/backend/x64/code-generator-x64.cc
+++ b/src/compiler/backend/x64/code-generator-x64.cc
@@ -735,14 +735,16 @@ void EmitWordLoadPoisoningIfNeeded(CodeGenerator* codegen,
     XMMRegister src1 = i.InputSimd128Register(1);                           \
     if (CpuFeatures::IsSupported(AVX)) {                                    \
       CpuFeatureScope avx_scope(tasm(), AVX);                               \
-      __ v##UNPACK_INSTR(kScratchDoubleReg, src0, src0);                    \
-      __ v##UNPACK_INSTR(dst, src1, src1);                                  \
+      __ v##UNPACK_INSTR(kScratchDoubleReg, src0, src1);                    \
+      __ vpsrlq(dst, kScratchDoubleReg, 32);                                  \
       __ v##MUL_INSTR(dst, kScratchDoubleReg, dst);                         \
     } else {                                                                \
       CpuFeatureScope avx_scope(tasm(), SSE4_1);                            \
       DCHECK_EQ(dst, src0);                                                 \
-      __ pshufd(kScratchDoubleReg, src0, SHUFFLE_CONST);                    \
-      __ pshufd(dst, src1, SHUFFLE_CONST);                                  \
+      __ movdqu(kScratchDoubleReg, src0);                                \
+      __ UNPACK_INSTR(kScratchDoubleReg, src1);                    \
+      __ movdqu(dst, kScratchDoubleReg);                               \
+      __ psrlq(dst, 32);                                  \
       __ MUL_INSTR(dst, kScratchDoubleReg);                                 \
     }                                                                       \
   } while (false)