SIMD plumbing

runtime/vm/stub_code_x64.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 321 matching lines @@
   // The code in this frame may not cause GC. kDeoptimizeCopyFrameRuntimeEntry
   // and kDeoptimizeFillFrameRuntimeEntry are leaf runtime calls.
   const intptr_t saved_rax_offset_from_ebp = -(kNumberOfCpuRegisters - RAX);
   // Result in EAX is preserved as part of pushing all registers below.
 
   // Push registers in their enumeration order: lowest register number at
   // lowest address.
   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.
   __ ReserveAlignedFrameSpace(0);
   __ SmiUntag(RAX);
   __ movq(RDI, RCX);  // Set up argument 1 saved_registers_address.
 
   __ CallRuntime(kDeoptimizeCopyFrameRuntimeEntry);
   // Result (RAX) is stack-size (FP - SP) in bytes, incl. the return address.
 
@@ skipping 1716 matching lines @@
   __ cmpq(left, right);
   __ Bind(&done);
   __ popq(right);
   __ popq(left);
   __ ret();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64