Revert of Remove obsolete V8_INFINITY macro.

src/assembler.cc

Index: src/assembler.cc
diff --git a/src/assembler.cc b/src/assembler.cc
index 958b4009fe1eb08b9585abbdd2ee1d1cc9f9d9c9..c73b470c28cb47592e502879253901488ce9483f 100644
--- a/src/assembler.cc
+++ b/src/assembler.cc
@@ -35,8 +35,6 @@
 #include "src/assembler.h"
 
 #include <cmath>
-#include <limits>
-
 #include "src/api.h"
 #include "src/base/cpu.h"
 #include "src/base/functional.h"
@@ -888,7 +886,7 @@
   double_constants.minus_one_half = -0.5;
   double_constants.canonical_non_hole_nan = base::OS::nan_value();
   double_constants.the_hole_nan = bit_cast<double>(kHoleNanInt64);
-  double_constants.negative_infinity = -std::numeric_limits<double>::infinity();
+  double_constants.negative_infinity = -V8_INFINITY;
   double_constants.uint32_bias =
     static_cast<double>(static_cast<uint32_t>(0xFFFFFFFF)) + 1;
 
@@ -912,7 +910,7 @@
     math_exp_constants_array[0] = -708.39641853226408;
     // Input values larger than this always return +Infinity.
     math_exp_constants_array[1] = 709.78271289338397;
-    math_exp_constants_array[2] = std::numeric_limits<double>::infinity();
+    math_exp_constants_array[2] = V8_INFINITY;
     // The rest is black magic. Do not attempt to understand it. It is
     // loosely based on the "expd" function published at:
     // http://herumi.blogspot.com/2011/08/fast-double-precision-exponential.html
@@ -1415,7 +1413,7 @@
     return power_double_int(x, y_int);  // Returns 1 if exponent is 0.
   }
   if (y == 0.5) {
-    return (std::isinf(x)) ? std::numeric_limits<double>::infinity()
+    return (std::isinf(x)) ? V8_INFINITY
                            : fast_sqrt(x + 0.0);  // Convert -0 to +0.
   }
   if (y == -0.5) {
@@ -1452,8 +1450,7 @@
   if ((x == 0.0 || std::isinf(x)) && std::isfinite(y)) {
     double f;
     if (std::modf(y, &f) != 0.0) {
-      return ((x == 0.0) ^ (y > 0)) ? std::numeric_limits<double>::infinity()
-                                    : 0.0;
+      return ((x == 0.0) ^ (y > 0)) ? V8_INFINITY : 0;
     }
   }