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Implement Thumb Instructions: STRH (imm), LDRH (imm)

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MerryMage
2016-07-18 18:28:52 +01:00
parent f9755870bb
commit a605a43ef9
3 changed files with 30 additions and 2 deletions
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18
src/frontend/translate/translate_thumb.cpp
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@@ -486,6 +486,24 @@ struct ThumbTranslatorVisitor final {
return true;
}
bool thumb16_STRH_imm(Imm5 imm5, Reg n, Reg t) {
u32 imm32 = imm5 << 1;
// STRH <Rt>, [<Rn>, #<imm5>]
auto address = ir.Add(ir.GetRegister(n), ir.Imm32(imm32));
auto data = ir.LeastSignificantHalf(ir.GetRegister(t));
ir.WriteMemory16(address, data);
return true;
}
bool thumb16_LDRH_imm(Imm5 imm5, Reg n, Reg t) {
u32 imm32 = imm5 << 1;
// LDRH <Rt>, [<Rn>, #<imm5>]
auto address = ir.Add(ir.GetRegister(n), ir.Imm32(imm32));
auto data = ir.ZeroExtendHalfToWord(ir.ReadMemory16(address));
ir.SetRegister(t, data);
return true;
}
bool thumb16_ADR(Reg d, Imm8 imm8) {
u32 imm32 = imm8 << 2;
// ADR <Rd>, <label>