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Create and use LZCOUNT Pcode op

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This commit is contained in:
Pokechu22
2022-07-11 12:40:19 -07:00
parent 865cd22cab
commit 14880b53c4
47 changed files with 288 additions and 247 deletions
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1
Ghidra/Processors/ARM/data/languages/ARM.sinc
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@@ -117,7 +117,6 @@ define context contextreg
ARMcondCk = (35,35) # Finished ARM condition check phase
;
define pcodeop count_leading_zeroes;
define pcodeop coprocessor_function;
define pcodeop coprocessor_function2;
define pcodeop coprocessor_load;

2
Ghidra/Processors/ARM/data/languages/ARMTHUMBinstructions.sinc
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@@ -1608,7 +1608,7 @@ define pcodeop IndexCheck;
:clz^ItCond Rd0811,Rm0003 is TMode=1 & ItCond & op4=0xfab & Rm0003; op12=15 & Rd0811
{
build ItCond;
Rd0811 = count_leading_zeroes(Rm0003);
Rd0811 = lzcount(Rm0003);
}
:cmn^ItCond Rn0003,ThumbExpandImm12 is TMode=1 & ItCond & (op11=0x1e & thc0909=0 & sop0508=8 & thc0404=1 & Rn0003; thc1515=0 & thc0811=15) & ThumbExpandImm12

2
Ghidra/Processors/ARM/data/languages/ARMinstructions.sinc
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@@ -2484,7 +2484,7 @@ ArmPCRelImmed12: reloff is U23=0 & immed & rotate
{
build COND;
build rm;
Rd = count_leading_zeroes(rm);
Rd = lzcount(rm);
}
@endif # VERSION_5

4
Ghidra/Processors/ARM/src/main/java/ghidra/program/emulation/ARMEmulateInstructionStateModifier.java
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@@ -19,7 +19,6 @@ import java.math.BigInteger;
import ghidra.pcode.emulate.Emulate;
import ghidra.pcode.emulate.EmulateInstructionStateModifier;
import ghidra.pcode.emulate.callother.CountLeadingZerosOpBehavior;
import ghidra.pcode.error.LowlevelError;
import ghidra.program.model.address.Address;
import ghidra.program.model.lang.Register;
@@ -46,8 +45,6 @@ public class ARMEmulateInstructionStateModifier extends EmulateInstructionStateM
aMode = new RegisterValue(TModeReg, BigInteger.ZERO);
}
registerPcodeOpBehavior("count_leading_zeroes", new CountLeadingZerosOpBehavior());
/**
* We could registerPcodeOpBehavior for one or more of the following pcodeop's:
*
@@ -85,7 +82,6 @@ public class ARMEmulateInstructionStateModifier extends EmulateInstructionStateM
coprocessor_store2
coprocessor_storelong
coprocessor_storelong2
count_leading_zeroes
disableDataAbortInterrupts
disableFIQinterrupts
disableIRQinterrupts