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Simplify intermediate 16-bit register usage

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Adrian Conlon committed 2026-04-16 13:47:24 +01:00
1 parent 53e33b9eef
commit 699791f7a4
10 files changed
+110 -57
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Z80/Z80.cs
+8 -7
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@@ -580,8 +580,8 @@ namespace Z80
break;
case 2:
this.Tick();
this.MEMPTR.Assign(this.GetWordPaged(data, this.IV));
this.Call(this.MEMPTR);
this.GetPagedInto(data, this.IV, this.MEMPTR);
base.Call();
Debug.Assert(this.Cycles == 19);
break;
default:
@@ -963,7 +963,8 @@ namespace Z80
this.SetWord(this.RP(p));
break;
case 1: // LD rp[p], (nn)
this.RP(p).Assign(this.GetWord());
this.GetWord();
this.RP(p).Assign(this.Intermediate);
break;
default:
throw new NotSupportedException("Invalid operation mode");
@@ -1215,7 +1216,8 @@ namespace Z80
break;
case 2: // LD HL,(nn)
this.FetchWordAddress();
this.HL2().Assign(this.GetWord());
this.GetWord();
this.HL2().Assign(this.Intermediate);
break;
case 3: // LD A,(nn)
this.FetchInto(this.MEMPTR);
@@ -1940,9 +1942,8 @@ namespace Z80
private void XHTL(Register16 exchange)
{
this.MEMPTR.Low = this.MemoryRead(this.SP);
this.Bus.Address.Increment();
this.MEMPTR.High = this.MemoryRead();
this.Bus.Address.Assign(this.SP);
this.GetInto(this.MEMPTR);
this.Bus.Data = exchange.High;
exchange.High = this.MEMPTR.High;
this.MemoryUpdate(2);