// 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. #include <cstdint> #include "include/v8config.h" #include "src/base/macros.h" #include "src/codegen/arm64/constants-arm64.h" namespace v8 { namespace internal { // ISA constants. -------------------------------------------------------------- // The following code initializes float/double variables with bit patterns. // // TODO(mostynb): replace these with std::numeric_limits constexpr's where // possible, and figure out how to replace *DefaultNaN with something clean, // then move this code back into instructions-arm64.cc with the same types // that client code uses. namespace integer_constants { constexpr uint16_t kFP16PositiveInfinity = 0x7C00; constexpr uint16_t kFP16NegativeInfinity = 0xFC00; constexpr uint32_t kFP32PositiveInfinity = 0x7F800000; constexpr uint32_t kFP32NegativeInfinity = 0xFF800000; constexpr uint64_t kFP64PositiveInfinity = 0x7FF0000000000000UL; constexpr uint64_t kFP64NegativeInfinity = 0xFFF0000000000000UL; // This value is a signalling NaN as both a double and as a float (taking the // least-significant word). constexpr uint64_t kFP64SignallingNaN = 0x7FF000007F800001; constexpr uint32_t kFP32SignallingNaN = 0x7F800001; // A similar value, but as a quiet NaN. constexpr uint64_t kFP64QuietNaN = 0x7FF800007FC00001; constexpr uint32_t kFP32QuietNaN = 0x7FC00001; // The default NaN values (for FPCR.DN=1). constexpr uint64_t kFP64DefaultNaN = 0x7FF8000000000000UL; constexpr uint32_t kFP32DefaultNaN = 0x7FC00000; extern const uint16_t kFP16DefaultNaN = 0x7E00; } // namespace integer_constants #if defined(V8_OS_WIN) extern "C" { #endif extern const float16 kFP16PositiveInfinity = bit_cast<float16>(integer_constants::kFP16PositiveInfinity); extern const float16 kFP16NegativeInfinity = bit_cast<float16>(integer_constants::kFP16NegativeInfinity); V8_EXPORT_PRIVATE extern const float kFP32PositiveInfinity = bit_cast<float>(integer_constants::kFP32PositiveInfinity); V8_EXPORT_PRIVATE extern const float kFP32NegativeInfinity = bit_cast<float>(integer_constants::kFP32NegativeInfinity); V8_EXPORT_PRIVATE extern const double kFP64PositiveInfinity = bit_cast<double>(integer_constants::kFP64PositiveInfinity); V8_EXPORT_PRIVATE extern const double kFP64NegativeInfinity = bit_cast<double>(integer_constants::kFP64NegativeInfinity); V8_EXPORT_PRIVATE extern const double kFP64SignallingNaN = bit_cast<double>(integer_constants::kFP64SignallingNaN); V8_EXPORT_PRIVATE extern const float kFP32SignallingNaN = bit_cast<float>(integer_constants::kFP32SignallingNaN); V8_EXPORT_PRIVATE extern const double kFP64QuietNaN = bit_cast<double>(integer_constants::kFP64QuietNaN); V8_EXPORT_PRIVATE extern const float kFP32QuietNaN = bit_cast<float>(integer_constants::kFP32QuietNaN); V8_EXPORT_PRIVATE extern const double kFP64DefaultNaN = bit_cast<double>(integer_constants::kFP64DefaultNaN); V8_EXPORT_PRIVATE extern const float kFP32DefaultNaN = bit_cast<float>(integer_constants::kFP32DefaultNaN); extern const float16 kFP16DefaultNaN = bit_cast<float16>(integer_constants::kFP16DefaultNaN); #if defined(V8_OS_WIN) } // end of extern "C" #endif } // namespace internal } // namespace v8