SIMD plumbing

runtime/vm/stub_code_x64.cc

Index: runtime/vm/stub_code_x64.cc
diff --git a/runtime/vm/stub_code_x64.cc b/runtime/vm/stub_code_x64.cc
index 51648086c8da5f3fcc851753c0665f865aa49d49..80f0f963585cb1c4ef6797ca97be1845e02e79be 100644
--- a/runtime/vm/stub_code_x64.cc
+++ b/runtime/vm/stub_code_x64.cc
@@ -339,12 +339,12 @@ static void GenerateDeoptimizationSequence(Assembler* assembler,
   for (intptr_t i = kNumberOfCpuRegisters - 1; i >= 0; i--) {
     __ pushq(static_cast<Register>(i));
   }
-  __ subq(RSP, Immediate(kNumberOfXmmRegisters * kDoubleSize));
+  __ subq(RSP, Immediate(kNumberOfXmmRegisters * kFpuRegisterSize));
   intptr_t offset = 0;
   for (intptr_t reg_idx = 0; reg_idx < kNumberOfXmmRegisters; ++reg_idx) {
     XmmRegister xmm_reg = static_cast<XmmRegister>(reg_idx);
-    __ movsd(Address(RSP, offset), xmm_reg);
-    offset += kDoubleSize;
+    __ movups(Address(RSP, offset), xmm_reg);
+    offset += kFpuRegisterSize;
   }
 
   __ movq(RCX, RSP);  // Saved saved registers block.