[turbofan] Add TruncateFloat32ToUint32 operator to Turbofan.

src/compiler/x64/code-generator-x64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 936 matching lines @@
       __ Roundss(i.OutputDoubleRegister(), i.InputDoubleRegister(0), mode);
       break;
     }
     case kSSEFloat32ToInt32:
       if (instr->InputAt(0)->IsDoubleRegister()) {
         __ Cvttss2si(i.OutputRegister(), i.InputDoubleRegister(0));
       } else {
         __ Cvttss2si(i.OutputRegister(), i.InputOperand(0));
       }
       break;
+    case kSSEFloat32ToUint32: {
+      if (instr->InputAt(0)->IsDoubleRegister()) {
+        __ Cvttss2siq(i.OutputRegister(), i.InputDoubleRegister(0));
+      } else {
+        __ Cvttss2siq(i.OutputRegister(), i.InputOperand(0));
+      }
+      __ AssertZeroExtended(i.OutputRegister());
+      break;
+    }
     case kSSEFloat64Cmp:
       ASSEMBLE_SSE_BINOP(Ucomisd);
       break;
     case kSSEFloat64Add:
       ASSEMBLE_SSE_BINOP(addsd);
       break;
     case kSSEFloat64Sub:
       ASSEMBLE_SSE_BINOP(subsd);
       break;
     case kSSEFloat64Mul:
@@ skipping 1168 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8