JitArm64_Integer: addzex - Optimize InHostCarry case for 0

Before: 0x5280000d mov w13, #0x0 ; =0 0x1a1f01ae adc w14, w13, wzr After: 0x1a9f37ee cset w14, hs
dolphin-emu · Dec 28, 2024 · 9691177 · 9691177
1 parent c817b47
commit 9691177
Showing 1 changed file with 8 additions and 4 deletions.
diff --git a/Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp b/Source/Core/Core/PowerPC/JitArm64/JitArm64_Integer.cpp
@@ -1129,8 +1129,7 @@ void JitArm64::addzex(UGeckoInstruction inst)
 
   int a = inst.RA, d = inst.RD;
 
-  if (gpr.IsImm(a) &&
-      (HasConstantCarry() || (js.carryFlag == CarryFlag::InPPCState && gpr.GetImm(a) == 0)))
+  if (gpr.IsImm(a) && (gpr.GetImm(a) == 0 || HasConstantCarry()))
   {
     const u32 imm = gpr.GetImm(a);
     const bool is_all_ones = imm == 0xFFFFFFFF;
@@ -1144,6 +1143,13 @@ void JitArm64::addzex(UGeckoInstruction inst)
       ComputeCarry(false);
       break;
     }
+    case CarryFlag::InHostCarry:
+    {
+      gpr.BindToRegister(d, false);
+      CSET(gpr.R(d), CCFlags::CC_CS);
+      ComputeCarry(false);
+      break;
+    }
     case CarryFlag::ConstantTrue:
     {
       gpr.SetImmediate(d, imm + 1);
@@ -1156,8 +1162,6 @@ void JitArm64::addzex(UGeckoInstruction inst)
       ComputeCarry(false);
       break;
     }
-    default:
-      Common::Unreachable();
     }
   }
   else