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A64: Implement FCCMP

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This commit is contained in:
MerryMage 2018-02-05 12:25:04 +00:00
parent 44c3c2312a
commit ef906dbbfa
3 changed files with 43 additions and 1 deletions
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1
src/CMakeLists.txt
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@ -77,6 +77,7 @@ add_library(dynarmic
frontend/A64/translate/impl/exception_generating.cpp
frontend/A64/translate/impl/floating_point_compare.cpp
frontend/A64/translate/impl/floating_point_conversion_integer.cpp
frontend/A64/translate/impl/floating_point_conditional_compare.cpp
frontend/A64/translate/impl/floating_point_conditional_select.cpp
frontend/A64/translate/impl/floating_point_data_processing_one_register.cpp
frontend/A64/translate/impl/floating_point_data_processing_two_register.cpp

2
src/frontend/A64/decoder/a64.inc
View file

@ -912,7 +912,7 @@ INST(FCMPE_float, "FCMPE", "00011
INST(FMOV_float_imm, "FMOV (scalar, immediate)", "00011110yy1iiiiiiii10000000ddddd")
// Data Processing - FP and SIMD - Floating point conditional compare
//INST(FCCMP_float, "FCCMP", "00011110yy1mmmmmcccc01nnnnn0ffff")
INST(FCCMP_float, "FCCMP", "00011110yy1mmmmmcccc01nnnnn0ffff")
//INST(FCCMPE_float, "FCCMPE", "00011110yy1mmmmmcccc01nnnnn1ffff")
// Data Processing - FP and SIMD - Floating point data processing two register

41
src/frontend/A64/translate/impl/floating_point_conditional_compare.cpp Normal file
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@ -0,0 +1,41 @@
/* This file is part of the dynarmic project.
* Copyright (c) 2018 MerryMage
* This software may be used and distributed according to the terms of the GNU
* General Public License version 2 or any later version.
*/
#include <boost/optional.hpp>
#include "frontend/A64/translate/impl/impl.h"
namespace Dynarmic::A64 {
static boost::optional<size_t> GetDataSize(Imm<2> type) {
switch (type.ZeroExtend()) {
case 0b00:
return 32;
case 0b01:
return 64;
case 0b11:
return 16;
}
return boost::none;
}
bool TranslatorVisitor::FCCMP_float(Imm<2> type, Vec Vm, Cond cond, Vec Vn, Imm<4> nzcv) {
const auto datasize = GetDataSize(type);
if (!datasize || *datasize == 16) {
return UnallocatedEncoding();
}
const u32 flags = nzcv.ZeroExtend<u32>() << 28;
const IR::U32U64 operand1 = V_scalar(*datasize, Vn);
const IR::U32U64 operand2 = V_scalar(*datasize, Vm);
const IR::NZCV then_flags = ir.FPCompare(operand1, operand2, false, true);
const IR::NZCV else_flags = ir.NZCVFromPackedFlags(ir.Imm32(flags));
ir.SetNZCV(ir.ConditionalSelect(cond, then_flags, else_flags));
return true;
}
} // namespace Dynarmic::A64