f83cd2da9a
Deduplicates the implementation code of instructions by extracting the code to a common function.
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
/* 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 <boost/optional.hpp>
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#include "frontend/A64/translate/impl/impl.h"
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namespace Dynarmic::A64 {
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namespace {
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boost::optional<size_t> GetDataSize(Imm<2> type) {
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switch (type.ZeroExtend()) {
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case 0b00:
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return 32;
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case 0b01:
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return 64;
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case 0b11:
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// FP16Ext, unimplemented.
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return boost::none;
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}
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return boost::none;
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}
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bool FPCompare(TranslatorVisitor& v, Imm<2> type, Vec Vm, Vec Vn, bool exc_on_qnan, bool cmp_with_zero) {
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const auto datasize = GetDataSize(type);
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if (!datasize) {
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return v.UnallocatedEncoding();
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}
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const IR::U32U64 operand1 = v.V_scalar(*datasize, Vn);
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IR::U32U64 operand2;
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if (cmp_with_zero) {
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operand2 = v.I(*datasize, 0);
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} else {
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operand2 = v.V_scalar(*datasize, Vm);
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}
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const auto nzcv = v.ir.FPCompare(operand1, operand2, exc_on_qnan, true);
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v.ir.SetNZCV(nzcv);
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return true;
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}
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} // Anonymous namespace
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bool TranslatorVisitor::FCMP_float(Imm<2> type, Vec Vm, Vec Vn, bool cmp_with_zero) {
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return FPCompare(*this, type, Vm, Vn, false, cmp_with_zero);
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}
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bool TranslatorVisitor::FCMPE_float(Imm<2> type, Vec Vm, Vec Vn, bool cmp_with_zero) {
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return FPCompare(*this, type, Vm, Vn, true, cmp_with_zero);
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}
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} // namespace Dynarmic::A64
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