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A64: Implement logical

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This commit is contained in:
MerryMage 2018-01-07 12:52:12 +00:00
parent 5a1d88c5dc
commit 0641445e51
13 changed files with 499 additions and 26 deletions
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24
src/frontend/A64/translate/impl/impl.cpp
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@ -4,6 +4,7 @@
* General Public License version 2 or any later version.
*/
#include "common/bit_util.h"
#include "frontend/ir/terminal.h"
#include "frontend/A64/translate/impl/impl.h"
@ -25,6 +26,29 @@ bool TranslatorVisitor::ReservedValue() {
return false;
}
boost::optional<TranslatorVisitor::BitMasks> TranslatorVisitor::DecodeBitMasks(bool immN, Imm<6> imms, Imm<6> immr, bool immediate) {
int len = Common::HighestSetBit((immN ? 1 << 6 : 0) | (imms.ZeroExtend() ^ 0b111111));
if (len < 1)
return boost::none;
size_t levels = Common::Ones<size_t>(len);
if (immediate && (imms.ZeroExtend() & levels) == levels)
return boost::none;
s32 S = s32(imms.ZeroExtend() & levels);
s32 R = s32(immr.ZeroExtend() & levels);
u64 d = u64(S - R) & levels;
size_t esize = 1 << len;
u64 welem = Common::Ones<u64>(S + 1);
u64 telem = Common::Ones<u64>(d + 1);
u64 wmask = Common::RotateRight(Common::Replicate(welem, esize), R);
u64 tmask = Common::Replicate(telem, esize);
return BitMasks{wmask, tmask};
}
IR::U32U64 TranslatorVisitor::I(size_t bitsize, u64 value) {
switch (bitsize) {
case 32: