SwitchEmu/dynarmic
1
0
Fork 0
mirror of https://git.suyu.dev/suyu/dynarmic.git synced 2026-03-08 00:06:28 +00:00
Code Issues Packages Projects Releases Wiki Activity

IR: Add ReplicateBit microinstruction

Browse Source
This commit is contained in:
MerryMage
2020-04-20 17:56:16 +01:00
parent 8f2dcd3e21
commit f59b9fb020
5 changed files with 46 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/frontend/A64/translate/impl/data_processing_bitfield.cpp
View File

@@ -8,12 +8,6 @@
namespace Dynarmic::A64 {
static IR::U32U64 ReplicateBit(IREmitter& ir, const IR::U32U64& value, u8 bit_position_to_replicate) {
const u8 datasize = value.GetType() == IR::Type::U64 ? 64 : 32;
const auto bit = ir.LogicalShiftLeft(value, ir.Imm8(datasize - 1 - bit_position_to_replicate));
return ir.ArithmeticShiftRight(bit, ir.Imm8(datasize - 1));
}
bool TranslatorVisitor::SBFM(bool sf, bool N, Imm<6> immr, Imm<6> imms, Reg Rn, Reg Rd) {
if (sf && !N) {
return ReservedValue();
@@ -34,7 +28,7 @@ bool TranslatorVisitor::SBFM(bool sf, bool N, Imm<6> immr, Imm<6> imms, Reg Rn,
const auto src = X(datasize, Rn);
auto bot = ir.And(ir.RotateRight(src, ir.Imm8(R)), I(datasize, masks->wmask));
auto top = ReplicateBit(ir, src, S);
auto top = ir.ReplicateBit(src, S);
top = ir.And(top, I(datasize, ~masks->tmask));
bot = ir.And(bot, I(datasize, masks->tmask));