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T32: Implement B, B.cond, BL, BLX (#3155)

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* Decoders: Make IsThumb a function of OpCode32

* OpCode32: Fix GetPc

* T32: Implement B, B.cond, BL, BLX

* rm usings
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merry 2022-03-04 22:05:08 +00:00 • committed by GitHub
parent ac21abbb9d
commit bd9ac0fdaa
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8 changed files with 253 additions and 9 deletions
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35
ARMeilleure/Decoders/OpCodeT32BImm24.cs Normal file
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using ARMeilleure.Instructions;
namespace ARMeilleure.Decoders
{
class OpCodeT32BImm24 : OpCodeT32, IOpCode32BImm
{
public long Immediate { get; }
public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCodeT32BImm24(inst, address, opCode);
public OpCodeT32BImm24(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
{
uint pc = GetPc();
if (inst.Name == InstName.Blx)
{
pc &= ~3u;
}
int imm11 = (opCode >> 0) & 0x7ff;
int j2 = (opCode >> 11) & 1;
int j1 = (opCode >> 13) & 1;
int imm10 = (opCode >> 16) & 0x3ff;
int s = (opCode >> 26) & 1;
int i1 = j1 ^ s ^ 1;
int i2 = j2 ^ s ^ 1;
int imm32 = imm11 | (imm10 << 11) | (i2 << 21) | (i1 << 22) | (s << 23);
imm32 = (imm32 << 9) >> 8;
Immediate = pc + imm32;
}
}
}