[turbofan] Implement rounding of floats on x64 and ia32 without sse4.1.

test/cctest/compiler/value-helper.h

 // Copyright 2014 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.
 
 #ifndef V8_CCTEST_COMPILER_VALUE_HELPER_H_
 #define V8_CCTEST_COMPILER_VALUE_HELPER_H_
 
 #include <stdint.h>
 
 #include "src/compiler/common-operator.h"
@@ skipping 158 matching lines @@
         3.40282e+38f,
         std::numeric_limits<float>::infinity(),
         nan,
         -nan,
     };
     return std::vector<float>(&kValues[0], &kValues[arraysize(kValues)]);
   }
 
   static std::vector<double> float64_vector() {
     static const double nan = std::numeric_limits<double>::quiet_NaN();
-    static const double values[] = {-2e66,
-                                    -9223373136366403584.0,
-                                    -9223372036854775808.0,  // INT64_MIN
-                                    -2147483649.5,
-                                    -2147483648.25,
-                                    -2147483648.0,
-                                    -2147483647.875,
-                                    -2147483647.125,
-                                    -2147483647.0,
-                                    -999.75,
-                                    -2e66,
-                                    -1.75,
-                                    -1.0,
-                                    -0.5,
-                                    -0.0,
-                                    0.0,
-                                    3e-88,
-                                    0.125,
-                                    0.25,
-                                    0.375,
-                                    0.5,
-                                    1.0,
-                                    1.25,
-                                    2,
-                                    3.1e7,
-                                    5.125,
-                                    6.25,
-                                    888,
-                                    982983.25,
-                                    2147483647.0,
-                                    2147483647.375,
-                                    2147483647.75,
-                                    2147483648.0,
-                                    2147483648.25,
-                                    2147483649.25,
-                                    9223372036854775807.0,  // INT64_MAX
-                                    9223373136366403584.0,
-                                    18446744073709551615.0,  // UINT64_MAX
-                                    2e66,
-                                    V8_INFINITY,
-                                    -V8_INFINITY,
-                                    -nan,
-                                    nan};
+    static const double values[] = {
+        -2e66,
+        -162259276829213363391578010288128.0,  // 2^107
+        -81129638414606681695789005144064.0,   // 2^106
+        -40564819207303349855093757313024.0,   // 2^105
+        -40564819207303340847894502572032.0, -9223373136366403584.75,
+        -9223373136366403584.5, -9223373136366403584.25, -9223373136366403584.0,
+        -9223372036854775808.0,  // INT64_MIN
+        -4503599627370497.5,
+        -4503599627370496.5,  // -2^52 - 0.5
+        -4503599627370495.5,
+        -2251799813685248.5,  // 2^51 + 0.5
+        -34359738368.75, -34359738368.5, -34359738368.25,
+        -4294967295.0,  // -2^32 + 1.0
+        -2147483649.5, -2147483648.25, -2147483648.0, -2147483647.875,
+        -2147483647.125, -2147483647.0, -999.75, -1.75, -1.0, -0.5, -0.0, 0.0,
+        3e-88, 0.125, 0.25, 0.375, 0.5, 1.0, 1.25, 2, 3.1e7, 5.125, 6.25, 888,
+        982983.25, 2147483647.0, 2147483647.375, 2147483647.75, 2147483648.0,
+        2147483648.25, 2147483649.25,
+        4294967295.0,  // +2^32 + 1.0
+        34359738368.75, 34359738368.5, 34359738368.25,
+        2251799813685248.5,  // 2^51 + 0.5
+        4503599627370495.5,
+        4503599627370496.5,  // 2^52 + 0.5
+        4503599627370497.5,
+        9223372036854775807.0,  // INT64_MAX
+        9223373136366403584.0,
+        18446744073709551615.0,  // UINT64_MAX
+        // 81129638414606681695789005144064.0,
+        2e66, V8_INFINITY, -V8_INFINITY, -nan, nan};
     return std::vector<double>(&values[0], &values[arraysize(values)]);
   }
 
   static const std::vector<int32_t> int32_vector() {
     std::vector<uint32_t> values = uint32_vector();
     return std::vector<int32_t>(values.begin(), values.end());
   }
 
   static const std::vector<uint32_t> uint32_vector() {
     static const uint32_t kValues[] = {
@@ skipping 78 matching lines @@
 
 #define FOR_INT32_SHIFTS(var) for (int32_t var = 0; var < 32; var++)
 
 #define FOR_UINT32_SHIFTS(var) for (uint32_t var = 0; var < 32; var++)
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CCTEST_COMPILER_VALUE_HELPER_H_