41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
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/* This file is part of the dynarmic project.
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* Copyright (c) 2018 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#include "common/assert.h"
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#include "common/bit_util.h"
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#include "common/fp/fpsr.h"
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#include "common/fp/info.h"
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#include "common/fp/process_exception.h"
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#include "common/fp/process_nan.h"
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#include "frontend/A64/FPCR.h"
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namespace Dynarmic::FP {
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template<typename FPT>
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FPT FPProcessNaN(FPType type, FPT op, FPCR fpcr, FPSR& fpsr) {
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ASSERT(type == FPType::QNaN || type == FPType::SNaN);
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constexpr size_t topfrac = FPInfo<FPT>::explicit_mantissa_width - 1;
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FPT result = op;
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if (type == FPType::SNaN) {
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result = Common::ModifyBit<topfrac>(op, true);
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FPProcessException(FPExc::InvalidOp, fpcr, fpsr);
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}
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if (fpcr.DN()) {
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result = FPInfo<FPT>::DefaultNaN();
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}
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return result;
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}
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template u32 FPProcessNaN<u32>(FPType type, u32 op, FPCR fpcr, FPSR& fpsr);
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template u64 FPProcessNaN<u64>(FPType type, u64 op, FPCR fpcr, FPSR& fpsr);
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} // namespace Dynarmic::FP
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