[wasm] Fix I32ReinterpretF32 and I64ReinterpretF64 on ia32.

src/compiler/instruction.h

Index: src/compiler/instruction.h
diff --git a/src/compiler/instruction.h b/src/compiler/instruction.h
index e63ceda14846cf1ecd65c44eb41a7f9247b04b94..1655ea92170545f8b4268922b7e575f9c43ec778 100644
--- a/src/compiler/instruction.h
+++ b/src/compiler/instruction.h
@@ -1069,12 +1069,23 @@ class V8_EXPORT_PRIVATE Constant final {
     return bit_cast<float>(static_cast<int32_t>(value_));
   }
 
+  int32_t ToFloat32AsInt() const {
+    DCHECK_EQ(kFloat32, type());
+    return static_cast<int32_t>(value_);
+  }
+
   double ToFloat64() const {
     if (type() == kInt32) return ToInt32();
     DCHECK_EQ(kFloat64, type());
     return bit_cast<double>(value_);
   }
 
+  int64_t ToFloat64AsInt() const {
+    if (type() == kInt32) return ToInt32();
+    DCHECK_EQ(kFloat64, type());
+    return value_;
+  }
+
   ExternalReference ToExternalReference() const {
     DCHECK_EQ(kExternalReference, type());
     return bit_cast<ExternalReference>(static_cast<intptr_t>(value_));