Revert grisu commits.

test/cctest/test-double.cc

Index: test/cctest/test-double.cc
===================================================================
--- test/cctest/test-double.cc	(revision 4091)
+++ test/cctest/test-double.cc	(working copy)
@@ -1,200 +0,0 @@
-// Copyright 2006-2008 the V8 project authors. All rights reserved.
-
-#include <stdlib.h>
-
-#include "v8.h"
-
-#include "platform.h"
-#include "cctest.h"
-#include "diy_fp.h"
-#include "double.h"
-
-using namespace v8::internal;
-
-
-TEST(Uint64Conversions) {
-  // Start by checking the byte-order.
-  uint64_t ordered = V8_2PART_UINT64_C(0x01234567, 89ABCDEF);
-  CHECK_EQ(3512700564088504e-318, Double(ordered).value());
-
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  CHECK_EQ(5e-324, Double(min_double64).value());
-
-  uint64_t max_double64 = V8_2PART_UINT64_C(0x7fefffff, ffffffff);
-  CHECK_EQ(1.7976931348623157e308, Double(max_double64).value());
-}
-
-TEST(AsDiyFp) {
-  uint64_t ordered = V8_2PART_UINT64_C(0x01234567, 89ABCDEF);
-  DiyFp diy_fp = Double(ordered).AsDiyFp();
-  CHECK_EQ(0x12 - 0x3FF - 52, diy_fp.e());
-  // The 52 mantissa bits, plus the implicit 1 in bit 52 as a UINT64.
-  CHECK(V8_2PART_UINT64_C(0x00134567, 89ABCDEF) == diy_fp.f());
-
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  diy_fp = Double(min_double64).AsDiyFp();
-  CHECK_EQ(-0x3FF - 52 + 1, diy_fp.e());
-  // This is a denormal; so no hidden bit.
-  CHECK(1 == diy_fp.f());
-
-  uint64_t max_double64 = V8_2PART_UINT64_C(0x7fefffff, ffffffff);
-  diy_fp = Double(max_double64).AsDiyFp();
-  CHECK_EQ(0x7FE - 0x3FF - 52, diy_fp.e());
-  CHECK(V8_2PART_UINT64_C(0x001fffff, ffffffff) == diy_fp.f());
-}
-
-
-TEST(AsNormalizedDiyFp) {
-  uint64_t ordered = V8_2PART_UINT64_C(0x01234567, 89ABCDEF);
-  DiyFp diy_fp = Double(ordered).AsNormalizedDiyFp();
-  CHECK_EQ(0x12 - 0x3FF - 52 - 11, diy_fp.e());
-  CHECK((V8_2PART_UINT64_C(0x00134567, 89ABCDEF) << 11) == diy_fp.f());
-
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  diy_fp = Double(min_double64).AsNormalizedDiyFp();
-  CHECK_EQ(-0x3FF - 52 + 1 - 63, diy_fp.e());
-  // This is a denormal; so no hidden bit.
-  CHECK(V8_2PART_UINT64_C(0x80000000, 00000000) == diy_fp.f());
-
-  uint64_t max_double64 = V8_2PART_UINT64_C(0x7fefffff, ffffffff);
-  diy_fp = Double(max_double64).AsNormalizedDiyFp();
-  CHECK_EQ(0x7FE - 0x3FF - 52 - 11, diy_fp.e());
-  CHECK((V8_2PART_UINT64_C(0x001fffff, ffffffff) << 11) == diy_fp.f());
-}
-
-
-TEST(IsDenormal) {
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  CHECK(Double(min_double64).IsDenormal());
-  uint64_t bits = V8_2PART_UINT64_C(0x000FFFFF, FFFFFFFF);
-  CHECK(Double(bits).IsDenormal());
-  bits = V8_2PART_UINT64_C(0x00100000, 00000000);
-  CHECK(!Double(bits).IsDenormal());
-}
-
-
-TEST(IsSpecial) {
-  CHECK(Double(V8_INFINITY).IsSpecial());
-  CHECK(Double(-V8_INFINITY).IsSpecial());
-  CHECK(Double(OS::nan_value()).IsSpecial());
-  uint64_t bits = V8_2PART_UINT64_C(0xFFF12345, 00000000);
-  CHECK(Double(bits).IsSpecial());
-  // Denormals are not special:
-  CHECK(!Double(5e-324).IsSpecial());
-  CHECK(!Double(-5e-324).IsSpecial());
-  // And some random numbers:
-  CHECK(!Double(0.0).IsSpecial());
-  CHECK(!Double(-0.0).IsSpecial());
-  CHECK(!Double(1.0).IsSpecial());
-  CHECK(!Double(-1.0).IsSpecial());
-  CHECK(!Double(1000000.0).IsSpecial());
-  CHECK(!Double(-1000000.0).IsSpecial());
-  CHECK(!Double(1e23).IsSpecial());
-  CHECK(!Double(-1e23).IsSpecial());
-  CHECK(!Double(1.7976931348623157e308).IsSpecial());
-  CHECK(!Double(-1.7976931348623157e308).IsSpecial());
-}
-
-
-TEST(IsInfinite) {
-  CHECK(Double(V8_INFINITY).IsInfinite());
-  CHECK(Double(-V8_INFINITY).IsInfinite());
-  CHECK(!Double(OS::nan_value()).IsInfinite());
-  CHECK(!Double(0.0).IsInfinite());
-  CHECK(!Double(-0.0).IsInfinite());
-  CHECK(!Double(1.0).IsInfinite());
-  CHECK(!Double(-1.0).IsInfinite());
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  CHECK(!Double(min_double64).IsInfinite());
-}
-
-
-TEST(IsNan) {
-  CHECK(Double(OS::nan_value()).IsNan());
-  uint64_t other_nan = V8_2PART_UINT64_C(0xFFFFFFFF, 00000001);
-  CHECK(Double(other_nan).IsNan());
-  CHECK(!Double(V8_INFINITY).IsNan());
-  CHECK(!Double(-V8_INFINITY).IsNan());
-  CHECK(!Double(0.0).IsNan());
-  CHECK(!Double(-0.0).IsNan());
-  CHECK(!Double(1.0).IsNan());
-  CHECK(!Double(-1.0).IsNan());
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  CHECK(!Double(min_double64).IsNan());
-}
-
-
-TEST(Sign) {
-  CHECK_EQ(1, Double(1.0).Sign());
-  CHECK_EQ(1, Double(V8_INFINITY).Sign());
-  CHECK_EQ(-1, Double(-V8_INFINITY).Sign());
-  CHECK_EQ(1, Double(0.0).Sign());
-  CHECK_EQ(-1, Double(-0.0).Sign());
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  CHECK_EQ(1, Double(min_double64).Sign());
-}
-
-
-TEST(NormalizedBoundaries) {
-  DiyFp boundary_plus;
-  DiyFp boundary_minus;
-  DiyFp diy_fp = Double(1.5).AsNormalizedDiyFp();
-  Double(1.5).NormalizedBoundaries(&boundary_minus, &boundary_plus);
-  CHECK_EQ(diy_fp.e(), boundary_minus.e());
-  CHECK_EQ(diy_fp.e(), boundary_plus.e());
-  // 1.5 does not have a significand of the form 2^p (for some p).
-  // Therefore its boundaries are at the same distance.
-  CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
-  CHECK((1 << 10) == diy_fp.f() - boundary_minus.f());
-
-  diy_fp = Double(1.0).AsNormalizedDiyFp();
-  Double(1.0).NormalizedBoundaries(&boundary_minus, &boundary_plus);
-  CHECK_EQ(diy_fp.e(), boundary_minus.e());
-  CHECK_EQ(diy_fp.e(), boundary_plus.e());
-  // 1.0 does have a significand of the form 2^p (for some p).
-  // Therefore its lower boundary is twice as close as the upper boundary.
-  CHECK_GT(boundary_plus.f() - diy_fp.f(), diy_fp.f() - boundary_minus.f());
-  CHECK((1 << 9) == diy_fp.f() - boundary_minus.f());
-  CHECK((1 << 10) == boundary_plus.f() - diy_fp.f());
-
-  uint64_t min_double64 = V8_2PART_UINT64_C(0x00000000, 00000001);
-  diy_fp = Double(min_double64).AsNormalizedDiyFp();
-  Double(min_double64).NormalizedBoundaries(&boundary_minus, &boundary_plus);
-  CHECK_EQ(diy_fp.e(), boundary_minus.e());
-  CHECK_EQ(diy_fp.e(), boundary_plus.e());
-  // min-value does not have a significand of the form 2^p (for some p).
-  // Therefore its boundaries are at the same distance.
-  CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
-  // Denormals have their boundaries much closer.
-  CHECK((static_cast<uint64_t>(1) << 62) == diy_fp.f() - boundary_minus.f());
-
-  uint64_t smallest_normal64 = V8_2PART_UINT64_C(0x00100000, 00000000);
-  diy_fp = Double(smallest_normal64).AsNormalizedDiyFp();
-  Double(smallest_normal64).NormalizedBoundaries(&boundary_minus,
-                                                 &boundary_plus);
-  CHECK_EQ(diy_fp.e(), boundary_minus.e());
-  CHECK_EQ(diy_fp.e(), boundary_plus.e());
-  // Even though the significand is of the form 2^p (for some p), its boundaries
-  // are at the same distance. (This is the only exception).
-  CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
-  CHECK((1 << 10) == diy_fp.f() - boundary_minus.f());
-
-  uint64_t largest_denormal64 = V8_2PART_UINT64_C(0x000FFFFF, FFFFFFFF);
-  diy_fp = Double(largest_denormal64).AsNormalizedDiyFp();
-  Double(largest_denormal64).NormalizedBoundaries(&boundary_minus,
-                                                  &boundary_plus);
-  CHECK_EQ(diy_fp.e(), boundary_minus.e());
-  CHECK_EQ(diy_fp.e(), boundary_plus.e());
-  CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
-  CHECK((1 << 11) == diy_fp.f() - boundary_minus.f());
-
-  uint64_t max_double64 = V8_2PART_UINT64_C(0x7fefffff, ffffffff);
-  diy_fp = Double(max_double64).AsNormalizedDiyFp();
-  Double(max_double64).NormalizedBoundaries(&boundary_minus, &boundary_plus);
-  CHECK_EQ(diy_fp.e(), boundary_minus.e());
-  CHECK_EQ(diy_fp.e(), boundary_plus.e());
-  // max-value does not have a significand of the form 2^p (for some p).
-  // Therefore its boundaries are at the same distance.
-  CHECK(diy_fp.f() - boundary_minus.f() == boundary_plus.f() - diy_fp.f());
-  CHECK((1 << 10) == diy_fp.f() - boundary_minus.f());
-}