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Fix PC alignment for ADR thumb instruction

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Gabriel A 2024-04-06 23:51:12 -03:00
parent 451a28afb8
commit d1b45f26da
1 changed files with 12 additions and 0 deletions
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12
src/ARMeilleure/Instructions/InstEmitAlu32.cs
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@ -19,6 +19,12 @@ namespace ARMeilleure.Instructions
Operand n = GetAluN(context);
Operand m = GetAluM(context, setCarry: false);
if (op.Rn == RegisterAlias.Aarch32Pc && op is OpCodeT32AluImm12)
{
// For ADR, PC is always 4 bytes aligned, even in Thumb mode.
n = context.BitwiseAnd(n, Const(~3u));
}
Operand res = context.Add(n, m);
if (ShouldSetFlags(context))
@ -467,6 +473,12 @@ namespace ARMeilleure.Instructions
Operand n = GetAluN(context);
Operand m = GetAluM(context, setCarry: false);
if (op.Rn == RegisterAlias.Aarch32Pc && op is OpCodeT32AluImm12)
{
// For ADR, PC is always 4 bytes aligned, even in Thumb mode.
n = context.BitwiseAnd(n, Const(~3u));
}
Operand res = context.Subtract(n, m);
if (ShouldSetFlags(context))