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fix(cpu): interim solution to weird program counter behaviour on illegal tst instruction

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This commit is contained in:
Rekai Nyangadzayi Musuka
2022-01-25 09:23:32 -04:00
parent 985fefb9f6
commit 6257418405
1 changed files with 4 additions and 0 deletions
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4
src/cpu/arm/data_processing.zig
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@@ -85,6 +85,7 @@ pub fn dataProcessing(comptime I: bool, comptime S: bool, comptime instrKind: u4
// TST
if (rd == 0xF) {
undefinedTestBehaviour(cpu);
cpu.r[15] += 4; // FIXME: This is objectively wrong I think
return;
}
@@ -95,6 +96,7 @@ pub fn dataProcessing(comptime I: bool, comptime S: bool, comptime instrKind: u4
// TEQ
if (rd == 0xF) {
undefinedTestBehaviour(cpu);
cpu.r[15] += 4; // FIXME: This is objectively wrong I think
return;
}
@@ -105,6 +107,7 @@ pub fn dataProcessing(comptime I: bool, comptime S: bool, comptime instrKind: u4
// CMP
if (rd == 0xF) {
undefinedTestBehaviour(cpu);
cpu.r[15] += 4; // FIXME: This is objectively wrong I think
return;
}
@@ -119,6 +122,7 @@ pub fn dataProcessing(comptime I: bool, comptime S: bool, comptime instrKind: u4
// CMN
if (rd == 0xF) {
undefinedTestBehaviour(cpu);
cpu.r[15] += 4; // FIXME: This is objectively wrong I think
return;
}