// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <cstdint>
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namespace v8 {
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namespace internal {
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// ISA constants. --------------------------------------------------------------
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// The following code initializes float/double variables with bit patterns
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// without using static initializers (which is surprisingly difficult in
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// C++). These variables are used by client code as extern float16,
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// extern float and extern double types, which works because (I think) the
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// linker ignores the types. This is kept in a separate source file to
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// avoid breaking jumbo builds.
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//
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// TODO(mostynb): replace these with std::numeric_limits constexpr's where
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// possible, and figure out how to replace *DefaultNaN with something clean,
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// then move this code back into instructions-arm64.cc with the same types
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// that client code uses.
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extern const uint16_t kFP16PositiveInfinity = 0x7C00;
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extern const uint16_t kFP16NegativeInfinity = 0xFC00;
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extern const uint32_t kFP32PositiveInfinity = 0x7F800000;
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extern const uint32_t kFP32NegativeInfinity = 0xFF800000;
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extern const uint64_t kFP64PositiveInfinity = 0x7FF0000000000000UL;
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extern const uint64_t kFP64NegativeInfinity = 0xFFF0000000000000UL;
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// This value is a signalling NaN as both a double and as a float (taking the
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// least-significant word).
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extern const uint64_t kFP64SignallingNaN = 0x7FF000007F800001;
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extern const uint32_t kFP32SignallingNaN = 0x7F800001;
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// A similar value, but as a quiet NaN.
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extern const uint64_t kFP64QuietNaN = 0x7FF800007FC00001;
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extern const uint32_t kFP32QuietNaN = 0x7FC00001;
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// The default NaN values (for FPCR.DN=1).
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extern const uint64_t kFP64DefaultNaN = 0x7FF8000000000000UL;
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extern const uint32_t kFP32DefaultNaN = 0x7FC00000;
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extern const uint16_t kFP16DefaultNaN = 0x7E00;
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} // namespace internal
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} // namespace v8
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