From ec3c59759169edfc7a5796fd5c71204c8eace48d Mon Sep 17 00:00:00 2001
From: Merry <git@mary.rs>
Date: Sat, 23 Jul 2022 00:00:59 +0100
Subject: [PATCH] backend/arm64: Implement LeastSignificantByte
---
.../backend/arm64/emit_arm64_data_processing.cpp | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/src/dynarmic/backend/arm64/emit_arm64_data_processing.cpp b/src/dynarmic/backend/arm64/emit_arm64_data_processing.cpp
index e51c0d66..859bcbca 100644
--- a/src/dynarmic/backend/arm64/emit_arm64_data_processing.cpp
+++ b/src/dynarmic/backend/arm64/emit_arm64_data_processing.cpp
@@ -95,10 +95,13 @@ void EmitIR<IR::Opcode::LeastSignificantHalf>(oaknut::CodeGenerator& code, EmitC
template<>
void EmitIR<IR::Opcode::LeastSignificantByte>(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst) {
- (void)code;
- (void)ctx;
- (void)inst;
- ASSERT_FALSE("Unimplemented");
+ auto args = ctx.reg_alloc.GetArgumentInfo(inst);
+
+ auto Wresult = ctx.reg_alloc.WriteW(inst);
+ auto Woperand = ctx.reg_alloc.ReadW(args[0]);
+ RegAlloc::Realize(Wresult, Woperand);
+
+ code.UXTB(Wresult, Woperand); // TODO: Zext elimination
}
template<>