X87: [turbofan] Add the RoundInt32ToFloat32 operator to turbofan.

src/compiler/x87/code-generator-x87.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 954 matching lines @@
       __ lea(esp, Operand(esp, 2 * kDoubleSize));
       break;
     }
     case kX87Float64Abs: {
       __ fstp(0);
       __ fld_d(MemOperand(esp, 0));
       __ fabs();
       __ lea(esp, Operand(esp, kDoubleSize));
       break;
     }
+    case kX87Int32ToFloat32: {
+      InstructionOperand* input = instr->InputAt(0);
+      DCHECK(input->IsRegister() || input->IsStackSlot());
+      __ fstp(0);
+      if (input->IsRegister()) {
+        Register input_reg = i.InputRegister(0);
+        __ push(input_reg);
+        __ fild_s(Operand(esp, 0));
+        __ pop(input_reg);
+      } else {
+        __ fild_s(i.InputOperand(0));
+      }
+      break;
+    }
     case kX87Int32ToFloat64: {
       InstructionOperand* input = instr->InputAt(0);
       DCHECK(input->IsRegister() || input->IsStackSlot());
       __ fstp(0);
       if (input->IsRegister()) {
         Register input_reg = i.InputRegister(0);
         __ push(input_reg);
         __ fild_s(Operand(esp, 0));
         __ pop(input_reg);
       } else {
@@ skipping 1022 matching lines @@
     int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc;
     __ Nop(padding_size);
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8