Reapply "Precompilation/x64: Load float vector constants via Thread."

runtime/vm/thread.cc

 // Copyright (c) 2015, 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/thread.h"
 
 #include "vm/dart_api_state.h"
 #include "vm/growable_array.h"
 #include "vm/isolate.h"
 #include "vm/lockers.h"
@@ skipping 69 matching lines @@
 #undef DEFAULT_INIT
 
   // We cannot initialize the VM constants here for the vm isolate thread
   // due to boot strapping issues.
   if ((Dart::vm_isolate() != NULL) && (isolate != Dart::vm_isolate())) {
     InitVMConstants();
   }
 }
 
 
+static const struct ALIGN16 {
+  uint64_t a;
+  uint64_t b;
+} double_negate_constant =
+    {0x8000000000000000LL, 0x8000000000000000LL};
+
+static const struct ALIGN16 {
+  uint64_t a;
+  uint64_t b;
+} double_abs_constant =
+    {0x7FFFFFFFFFFFFFFFLL, 0x7FFFFFFFFFFFFFFFLL};
+
+static const struct ALIGN16 {
+  uint32_t a;
+  uint32_t b;
+  uint32_t c;
+  uint32_t d;
+} float_not_constant =
+    { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
+
+static const struct ALIGN16 {
+  uint32_t a;
+  uint32_t b;
+  uint32_t c;
+  uint32_t d;
+} float_negate_constant =
+    { 0x80000000, 0x80000000, 0x80000000, 0x80000000 };
+
+static const struct ALIGN16 {
+  uint32_t a;
+  uint32_t b;
+  uint32_t c;
+  uint32_t d;
+} float_absolute_constant =
+    { 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF, 0x7FFFFFFF };
+
+static const struct ALIGN16 {
+  uint32_t a;
+  uint32_t b;
+  uint32_t c;
+  uint32_t d;
+} float_zerow_constant =
+    { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000 };
+
+
 void Thread::InitVMConstants() {
 #define ASSERT_VM_HEAP(type_name, member_name, init_expr, default_init_value)  \
   ASSERT((init_expr)->IsOldObject());
 CACHED_VM_OBJECTS_LIST(ASSERT_VM_HEAP)
 #undef ASSERT_VM_HEAP
 
 #define INIT_VALUE(type_name, member_name, init_expr, default_init_value)      \
   ASSERT(member_name == default_init_value);                                   \
   member_name = (init_expr);
 CACHED_CONSTANTS_LIST(INIT_VALUE)
@@ skipping 304 matching lines @@
 
 DisableThreadInterruptsScope::~DisableThreadInterruptsScope() {
   if (thread() != NULL) {
     OSThread* os_thread = thread()->os_thread();
     ASSERT(os_thread != NULL);
     os_thread->EnableThreadInterrupts();
   }
 }
 
 }  // namespace dart