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A64: Implement FCVTZS (scalar, integer), FCVTZU (scalar, integer)

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MerryMage 2018-02-04 13:08:25 +00:00
parent b173fcf34e
commit 2409e5d082
5 changed files with 86 additions and 6 deletions
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79
src/frontend/A64/translate/impl/floating_point_conversion_integer.cpp Normal file
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/* 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::FCVTZS_float_int(bool sf, Imm<2> type, Vec Vn, Reg Rd) {
const size_t intsize = sf ? 64 : 32;
const auto fltsize = GetDataSize(type);
if (!fltsize || *fltsize == 16) {
return UnallocatedEncoding();
}
const IR::U32U64 fltval = V_scalar(*fltsize, Vn);
IR::U32U64 intval;
if (intsize == 32 && *fltsize == 32) {
intval = ir.FPSingleToS32(fltval, true, true);
} else if (intsize == 32 && *fltsize == 64) {
intval = ir.FPDoubleToS32(fltval, true, true);
} else if (intsize == 64 && *fltsize == 32) {
return InterpretThisInstruction();
} else if (intsize == 64 && *fltsize == 64) {
return InterpretThisInstruction();
} else {
UNREACHABLE();
}
X(intsize, Rd, intval);
return true;
}
bool TranslatorVisitor::FCVTZU_float_int(bool sf, Imm<2> type, Vec Vn, Reg Rd) {
const size_t intsize = sf ? 64 : 32;
const auto fltsize = GetDataSize(type);
if (!fltsize || *fltsize == 16) {
return UnallocatedEncoding();
}
const IR::U32U64 fltval = V_scalar(*fltsize, Vn);
IR::U32U64 intval;
if (intsize == 32 && *fltsize == 32) {
intval = ir.FPSingleToU32(fltval, true, true);
} else if (intsize == 32 && *fltsize == 64) {
intval = ir.FPDoubleToU32(fltval, true, true);
} else if (intsize == 64 && *fltsize == 32) {
return InterpretThisInstruction();
} else if (intsize == 64 && *fltsize == 64) {
return InterpretThisInstruction();
} else {
UNREACHABLE();
}
X(intsize, Rd, intval);
return true;
}
} // namespace Dynarmic::A64