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A64: Implement FCSEL

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This commit is contained in:
MerryMage 2018-02-04 13:40:37 +00:00
parent 7e82d8eede
commit 8765b421b7
3 changed files with 41 additions and 1 deletions
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1
src/CMakeLists.txt
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@ -76,6 +76,7 @@ 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_select.cpp
frontend/A64/translate/impl/floating_point_data_processing_one_register.cpp
frontend/A64/translate/impl/floating_point_data_processing_two_register.cpp
frontend/A64/translate/impl/impl.cpp

2
src/frontend/A64/decoder/a64.inc
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@ -943,7 +943,7 @@ INST(FSUB_float, "FSUB (scalar)", "00011
INST(FNMUL_float, "FNMUL (scalar)", "00011110yy1mmmmm100010nnnnnddddd")
// Data Processing - FP and SIMD - Floating point conditional select
//INST(FCSEL_float, "FCSEL", "00011110yy1mmmmmcccc11nnnnnddddd")
INST(FCSEL_float, "FCSEL", "00011110yy1mmmmmcccc11nnnnnddddd")
// Data Processing - FP and SIMD - Floating point data processing three register
//INST(FMADD_float, "FMADD", "00011111yy0mmmmm0aaaaannnnnddddd")

39
src/frontend/A64/translate/impl/floating_point_conditional_select.cpp Normal file
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@ -0,0 +1,39 @@
/* 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::FCSEL_float(Imm<2> type, Vec Vm, Cond cond, Vec Vn, Vec Vd) {
const auto datasize = GetDataSize(type);
if (!datasize || *datasize == 16) {
return UnallocatedEncoding();
}
const IR::U32U64 operand1 = V_scalar(*datasize, Vn);
const IR::U32U64 operand2 = V_scalar(*datasize, Vm);
const IR::U32U64 result = ir.ConditionalSelect(cond, operand1, operand2);
V_scalar(*datasize, Vd, result);
return true;
}
} // namespace Dynarmic::A64