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GP-4859 RuleOrCompare

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This commit is contained in:
caheckman 2024-08-20 20:16:26 +00:00
parent 2ef83410be
commit a31c4033a8
8 changed files with 141 additions and 234 deletions
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39
Ghidra/Features/Decompiler/src/decompile/cpp/op.cc
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@ -4,9 +4,9 @@
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*
* http://www.apache.org/licenses/LICENSE-2.0
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@ -672,20 +672,33 @@ uintb PcodeOp::getNZMaskLocal(bool cliploop) const
case CPUI_INT_MULT:
val = getIn(0)->getNZMask();
resmask = getIn(1)->getNZMask();
sz1 = (size > sizeof(uintb)) ? 8*size-1 : mostsigbit_set(val);
if (sz1 == -1)
resmask = 0;
if (size > sizeof(uintb)) {
resmask = fullmask;
}
else {
sz2 = (size > sizeof(uintb)) ? 8*size-1 : mostsigbit_set(resmask);
if (sz2 == -1)
sz1 = mostsigbit_set(val);
sz2 = mostsigbit_set(resmask);
if (sz1 == -1 || sz2 == -1) {
resmask = 0;
}
else {
if (sz1 + sz2 < 8*size-2)
fullmask >>= (8*size-2-sz1-sz2);
sz1 = leastsigbit_set(val);
sz2 = leastsigbit_set(resmask);
resmask = (~((uintb)0))<<(sz1+sz2);
resmask &= fullmask;
int4 l1 = leastsigbit_set(val);
int4 l2 = leastsigbit_set(resmask);
sa = l1 + l2;
if (sa >= 8*size) {
resmask = 0;
}
else {
sz1 = sz1 - l1 + 1;
sz2 = sz2 - l2 + 1;
int4 total = sz1 + sz2;
if (sz1 == 1 || sz2 == 1)
total -= 1;
resmask = fullmask;
if (total < 8 * size)
resmask >>= (8*size - total);
resmask = (resmask << sa) & fullmask;
}
}
}
break;