6502/millfork
1
0
Fork 0
mirror of https://github.com/KarolS/millfork.git synced 2025-08-09 10:24:57 +00:00
Code Issues Projects Releases Wiki Activity

6502: Optimize hi(nonet(...))

Browse Source
This commit is contained in:
Karol Stasiak
2019-10-22 16:34:13 +02:00
parent ec96f16482
commit 5ad6da2be4
1 changed files with 31 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
src/main/scala/millfork/assembly/mos/opt/AlwaysGoodOptimizations.scala
View File

@@ -2567,6 +2567,22 @@ object AlwaysGoodOptimizations {
AssemblyLine.immediate(ADC, 0), AssemblyLine.immediate(ADC, 0),
code(5).copy(opcode = STA)) //STX code(5).copy(opcode = STA)) //STX
}, },
(Elidable & HasOpcode(LDX) & HasImmediate(0)) ~
(Elidable & HasOpcode(BCC) & MatchParameter(1)) ~
(Elidable & HasOpcode(INX)) ~
(Elidable & HasOpcode(LABEL) & MatchParameter(1) & IsNotALabelUsedManyTimes) ~
(Elidable & HasOpcode(TXA) & DoesntMatterWhatItDoesWith(State.C, State.X)) ~~> { (code, ctx) =>
List(AssemblyLine.immediate(LDA, 0), AssemblyLine.implied(ROL))
},
(Elidable & HasOpcode(LDX) & HasImmediate(0)) ~
(Elidable & HasOpcode(BCC) & MatchParameter(1)) ~
(Elidable & HasOpcode(INX)) ~
(Elidable & HasOpcode(LABEL) & MatchParameter(1) & IsNotALabelUsedManyTimes) ~
(Elidable & HasOpcode(TXA) & DoesntMatterWhatItDoesWith(State.C)) ~~> { (code, ctx) =>
List(AssemblyLine.immediate(LDA, 0), AssemblyLine.implied(ROL), AssemblyLine.implied(TAX))
},
) )
val NonetBitOp = new RuleBasedAssemblyOptimization("Nonet bit operation", val NonetBitOp = new RuleBasedAssemblyOptimization("Nonet bit operation",
@@ -2976,6 +2992,21 @@ object AlwaysGoodOptimizations {
} }
}), }),
(Elidable & HasOpcode(LDA) & HasImmediate(1)) ~
(Elidable & HasOpcode(BIT)) ~
(Elidable & HasOpcode(BEQ) & MatchParameter(1)) ~
(Elidable & HasOpcode(LDA) & HasImmediate(0)) ~
(Elidable & HasOpcode(LABEL) & MatchParameter(1) & IsNotALabelUsedManyTimes & DoesntMatterWhatItDoesWith(State.N, State.Z, State.C, State.V)) ~~> { code =>
List(code(1).copy(opcode = LDA), code.head.copy(opcode = AND), code.head.copy(opcode = EOR))
},
(Elidable & HasOpcode(LDA) & HasImmediate(1)) ~
(Elidable & HasOpcode(BIT)) ~
(Elidable & HasOpcode(BNE) & MatchParameter(1)) ~
(Elidable & HasOpcode(LDA) & HasImmediate(0)) ~
(Elidable & HasOpcode(LABEL) & MatchParameter(1) & IsNotALabelUsedManyTimes & DoesntMatterWhatItDoesWith(State.N, State.Z, State.C, State.V)) ~~> { code =>
List(code(1).copy(opcode = LDA), code.head.copy(opcode = AND))
},
) )
private val powersOf2: List[(Int, Int)] = List( private val powersOf2: List[(Int, Int)] = List(