Revert of Remove obsolete V8_INFINITY macro.

src/mips64/simulator-mips64.cc

 // Copyright 2011 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 <limits.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #include "src/v8.h"
@@ skipping 1186 matching lines @@
 
   if (!std::isfinite(original) || !std::isfinite(rounded)) {
     set_fcsr_bit(kFCSRInvalidOpFlagBit, true);
     ret = true;
   }
 
   if (original != rounded) {
     set_fcsr_bit(kFCSRInexactFlagBit, true);
   }
 
-  if (rounded < std::numeric_limits<double>::min() &&
-      rounded > -std::numeric_limits<double>::min() && rounded != 0) {
+  if (rounded < DBL_MIN && rounded > -DBL_MIN && rounded != 0) {
     set_fcsr_bit(kFCSRUnderflowFlagBit, true);
     ret = true;
   }
 
   if (rounded > max_int32 || rounded < min_int32) {
     set_fcsr_bit(kFCSROverflowFlagBit, true);
     // The reference is not really clear but it seems this is required:
     set_fcsr_bit(kFCSRInvalidOpFlagBit, true);
     ret = true;
   }
@@ skipping 11 matching lines @@
 
   if (!std::isfinite(original) || !std::isfinite(rounded)) {
     set_fcsr_bit(kFCSRInvalidOpFlagBit, true);
     ret = true;
   }
 
   if (original != rounded) {
     set_fcsr_bit(kFCSRInexactFlagBit, true);
   }
 
-  if (rounded < std::numeric_limits<double>::min() &&
-      rounded > -std::numeric_limits<double>::min() && rounded != 0) {
+  if (rounded < DBL_MIN && rounded > -DBL_MIN && rounded != 0) {
     set_fcsr_bit(kFCSRUnderflowFlagBit, true);
     ret = true;
   }
 
   if (rounded > max_int64 || rounded < min_int64) {
     set_fcsr_bit(kFCSROverflowFlagBit, true);
     // The reference is not really clear but it seems this is required:
     set_fcsr_bit(kFCSRInvalidOpFlagBit, true);
     ret = true;
   }
@@ skipping 2197 matching lines @@
 }
 
 
 #undef UNSUPPORTED
 
 } }  // namespace v8::internal
 
 #endif  // USE_SIMULATOR
 
 #endif  // V8_TARGET_ARCH_MIPS64