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Diffstat (limited to 'deps/v8/src/boxed-float.h')
-rw-r--r-- | deps/v8/src/boxed-float.h | 98 |
1 files changed, 0 insertions, 98 deletions
diff --git a/deps/v8/src/boxed-float.h b/deps/v8/src/boxed-float.h deleted file mode 100644 index cdcc8fdad7..0000000000 --- a/deps/v8/src/boxed-float.h +++ /dev/null @@ -1,98 +0,0 @@ -// Copyright 2017 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_BOXED_FLOAT_H_ -#define V8_BOXED_FLOAT_H_ - -#include <cmath> -#include "src/base/macros.h" -#include "src/globals.h" - -namespace v8 { -namespace internal { - -// TODO(ahaas): Make these classes with the one in double.h - -// Safety wrapper for a 32-bit floating-point value to make sure we don't lose -// the exact bit pattern during deoptimization when passing this value. -class Float32 { - public: - Float32() = default; - - // This constructor does not guarantee that bit pattern of the input value - // is preserved if the input is a NaN. - explicit Float32(float value) : bit_pattern_(bit_cast<uint32_t>(value)) { - // Check that the provided value is not a NaN, because the bit pattern of a - // NaN may be changed by a bit_cast, e.g. for signalling NaNs on ia32. - DCHECK(!std::isnan(value)); - } - - uint32_t get_bits() const { return bit_pattern_; } - - float get_scalar() const { return bit_cast<float>(bit_pattern_); } - - bool is_nan() const { - // Even though {get_scalar()} might flip the quiet NaN bit, it's ok here, - // because this does not change the is_nan property. - return std::isnan(get_scalar()); - } - - // Return a pointer to the field storing the bit pattern. Used in code - // generation tests to store generated values there directly. - uint32_t* get_bits_address() { return &bit_pattern_; } - - static constexpr Float32 FromBits(uint32_t bits) { return Float32(bits); } - - private: - uint32_t bit_pattern_ = 0; - - explicit constexpr Float32(uint32_t bit_pattern) - : bit_pattern_(bit_pattern) {} -}; - -ASSERT_TRIVIALLY_COPYABLE(Float32); - -// Safety wrapper for a 64-bit floating-point value to make sure we don't lose -// the exact bit pattern during deoptimization when passing this value. -// TODO(ahaas): Unify this class with Double in double.h -class Float64 { - public: - Float64() = default; - - // This constructor does not guarantee that bit pattern of the input value - // is preserved if the input is a NaN. - explicit Float64(double value) : bit_pattern_(bit_cast<uint64_t>(value)) { - // Check that the provided value is not a NaN, because the bit pattern of a - // NaN may be changed by a bit_cast, e.g. for signalling NaNs on ia32. - DCHECK(!std::isnan(value)); - } - - uint64_t get_bits() const { return bit_pattern_; } - double get_scalar() const { return bit_cast<double>(bit_pattern_); } - bool is_hole_nan() const { return bit_pattern_ == kHoleNanInt64; } - bool is_nan() const { - // Even though {get_scalar()} might flip the quiet NaN bit, it's ok here, - // because this does not change the is_nan property. - return std::isnan(get_scalar()); - } - - // Return a pointer to the field storing the bit pattern. Used in code - // generation tests to store generated values there directly. - uint64_t* get_bits_address() { return &bit_pattern_; } - - static constexpr Float64 FromBits(uint64_t bits) { return Float64(bits); } - - private: - uint64_t bit_pattern_ = 0; - - explicit constexpr Float64(uint64_t bit_pattern) - : bit_pattern_(bit_pattern) {} -}; - -ASSERT_TRIVIALLY_COPYABLE(Float64); - -} // namespace internal -} // namespace v8 - -#endif // V8_BOXED_FLOAT_H_ |