-
-
Notifications
You must be signed in to change notification settings - Fork 17
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
rebuilding floating point stack evaluation (using cpu stack)
- Loading branch information
Showing
9 changed files
with
414 additions
and
35 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
266 changes: 266 additions & 0 deletions
266
codeGenCpu6502/src/prog8/codegen/cpu6502/assignment/AnyExprAsmGen.kt
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,266 @@ | ||
| package prog8.codegen.cpu6502.assignment | ||
|
|
||
| import prog8.code.ast.PtBinaryExpression | ||
| import prog8.code.core.* | ||
| import prog8.codegen.cpu6502.AsmGen6502Internal | ||
|
|
||
| // | ||
| // This contains codegen for stack-based evaluation of binary expressions. | ||
| // It uses the CPU stack so depth is limited. | ||
| // It is called "as a last resort" if the optimized codegen path is unable | ||
| // to come up with a special case of the expression. | ||
| // | ||
| internal class AnyExprAsmGen( | ||
| private val asmgen: AsmGen6502Internal | ||
| ) { | ||
| fun assignAnyExpressionUsingStack(expr: PtBinaryExpression, assign: AsmAssignment): Boolean { | ||
| when(expr.type) { | ||
| in ByteDatatypes -> { | ||
| if(expr.left.type in ByteDatatypes && expr.right.type in ByteDatatypes) | ||
| return assignByteBinExpr(expr, assign) | ||
| if (expr.left.type in WordDatatypes && expr.right.type in WordDatatypes) { | ||
| require(expr.operator in ComparisonOperators) | ||
| TODO("words operands comparison -> byte") | ||
| } | ||
| if (expr.left.type==DataType.FLOAT && expr.right.type==DataType.FLOAT) { | ||
| require(expr.operator in ComparisonOperators) | ||
| return assignFloatBinExpr(expr, assign) | ||
| } | ||
| TODO("weird expr operand types") | ||
| } | ||
| in WordDatatypes -> { | ||
| require(expr.left.type in WordDatatypes && expr.right.type in WordDatatypes) { | ||
| "both operands must be words" | ||
| } | ||
| return assignWordBinExpr(expr, assign) | ||
| } | ||
| DataType.FLOAT -> { | ||
| require(expr.left.type==DataType.FLOAT && expr.right.type==DataType.FLOAT) { | ||
| "both operands must be floats" | ||
| } | ||
| return assignFloatBinExpr(expr, assign) | ||
| } | ||
| else -> throw AssemblyError("weird expression type in assignment") | ||
| } | ||
| } | ||
|
|
||
| private fun assignWordBinExpr(expr: PtBinaryExpression, assign: AsmAssignment): Boolean { | ||
| when(expr.operator) { | ||
| "+" -> { | ||
| TODO("word + at ${expr.position}") | ||
| } | ||
| "-" -> { | ||
| TODO("word - at ${expr.position}") | ||
| } | ||
| "*" -> { | ||
| TODO("word * at ${expr.position}") | ||
| } | ||
| "/" -> { | ||
| TODO("word / at ${expr.position}") | ||
| } | ||
| "<<" -> { | ||
| TODO("word << at ${expr.position}") | ||
| } | ||
| ">>" -> { | ||
| TODO("word >> at ${expr.position}") | ||
| } | ||
| "%" -> { | ||
| TODO("word % at ${expr.position}") | ||
| } | ||
| "&", "and" -> { | ||
| TODO("word and at ${expr.position}") | ||
| } | ||
| "|", "or" -> { | ||
| TODO("word or at ${expr.position}") | ||
| } | ||
| "^", "xor" -> { | ||
| TODO("word xor at ${expr.position}") | ||
| } | ||
| "==" -> { | ||
| TODO("word == at ${expr.position}") | ||
| } | ||
| "!=" -> { | ||
| TODO("word != at ${expr.position}") | ||
| } | ||
| "<" -> { | ||
| TODO("word < at ${expr.position}") | ||
| } | ||
| "<=" -> { | ||
| TODO("word <= at ${expr.position}") | ||
| } | ||
| ">" -> { | ||
| TODO("word > at ${expr.position}") | ||
| } | ||
| ">=" -> { | ||
| TODO("word >= at ${expr.position}") | ||
| } | ||
| else -> return false | ||
| } | ||
| } | ||
|
|
||
| private fun assignByteBinExpr(expr: PtBinaryExpression, assign: AsmAssignment): Boolean { | ||
| when(expr.operator) { | ||
| "+" -> { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.A, false) | ||
| asmgen.out(" pha") | ||
| asmgen.assignExpressionToVariable(expr.right, "P8ZP_SCRATCH_B1", DataType.UBYTE) | ||
| asmgen.out(" pla | clc | adc P8ZP_SCRATCH_B1") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "-" -> { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.A, false) | ||
| asmgen.out(" pha") | ||
| asmgen.assignExpressionToVariable(expr.right, "P8ZP_SCRATCH_B1", DataType.UBYTE) | ||
| asmgen.out(" pla | sec | sbc P8ZP_SCRATCH_B1") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "*" -> { | ||
| TODO("byte * at ${expr.position}") | ||
| } | ||
| "/" -> { | ||
| TODO("byte / at ${expr.position}") | ||
| } | ||
| "<<" -> { | ||
| TODO("byte << at ${expr.position}") | ||
| } | ||
| ">>" -> { | ||
| TODO("byte >> at ${expr.position}") | ||
| } | ||
| "%" -> { | ||
| TODO("byte % at ${expr.position}") | ||
| } | ||
| "&", "and" -> { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.A, false) | ||
| asmgen.out(" pha") | ||
| asmgen.assignExpressionToVariable(expr.right, "P8ZP_SCRATCH_B1", DataType.UBYTE) | ||
| asmgen.out(" pla | and P8ZP_SCRATCH_B1") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "|", "or" -> { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.A, false) | ||
| asmgen.out(" pha") | ||
| asmgen.assignExpressionToVariable(expr.right, "P8ZP_SCRATCH_B1", DataType.UBYTE) | ||
| asmgen.out(" pla | ora P8ZP_SCRATCH_B1") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "^", "xor" -> { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.A, false) | ||
| asmgen.out(" pha") | ||
| asmgen.assignExpressionToVariable(expr.right, "P8ZP_SCRATCH_B1", DataType.UBYTE) | ||
| asmgen.out(" pla | eor P8ZP_SCRATCH_B1") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "==" -> { | ||
| TODO("byte == at ${expr.position}") | ||
| } | ||
| "!=" -> { | ||
| TODO("byte != at ${expr.position}") | ||
| } | ||
| "<" -> { | ||
| TODO("byte < at ${expr.position}") | ||
| } | ||
| "<=" -> { | ||
| TODO("byte <= at ${expr.position}") | ||
| } | ||
| ">" -> { | ||
| TODO("byte > at ${expr.position}") | ||
| } | ||
| ">=" -> { | ||
| TODO("byte >= at ${expr.position}") | ||
| } | ||
| else -> return false | ||
| } | ||
| } | ||
|
|
||
| private fun assignFloatBinExpr(expr: PtBinaryExpression, assign: AsmAssignment): Boolean { | ||
| when(expr.operator) { | ||
| "+" -> { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.FAC1, true) | ||
| if(!expr.right.isSimple()) asmgen.pushFAC1() | ||
| asmgen.assignExpressionToRegister(expr.right, RegisterOrPair.FAC2, true) | ||
| if(!expr.right.isSimple()) asmgen.popFAC1() | ||
| asmgen.out(" jsr floats.FADDT") | ||
| asmgen.assignRegister(RegisterOrPair.FAC1, assign.target) | ||
| return true | ||
| } | ||
| "-" -> { | ||
| asmgen.assignExpressionToRegister(expr.right, RegisterOrPair.FAC1, true) | ||
| if(!expr.left.isSimple()) asmgen.pushFAC1() | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.FAC2, true) | ||
| if(!expr.left.isSimple()) asmgen.popFAC1() | ||
| asmgen.out(" jsr floats.FSUBT") | ||
| asmgen.assignRegister(RegisterOrPair.FAC1, assign.target) | ||
| return true | ||
| } | ||
| "*" -> { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.FAC1, true) | ||
| if(!expr.right.isSimple()) asmgen.pushFAC1() | ||
| asmgen.assignExpressionToRegister(expr.right, RegisterOrPair.FAC2, true) | ||
| if(!expr.right.isSimple()) asmgen.popFAC1() | ||
| asmgen.out(" jsr floats.FMULTT") | ||
| asmgen.assignRegister(RegisterOrPair.FAC1, assign.target) | ||
| return true | ||
| } | ||
| "/" -> { | ||
| asmgen.assignExpressionToRegister(expr.right, RegisterOrPair.FAC1, true) | ||
| if(!expr.left.isSimple()) asmgen.pushFAC1() | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.FAC2, true) | ||
| if(!expr.left.isSimple()) asmgen.popFAC1() | ||
| asmgen.out(" jsr floats.FDIVT") | ||
| asmgen.assignRegister(RegisterOrPair.FAC1, assign.target) | ||
| return true | ||
| } | ||
| "==" -> { | ||
| setupFloatComparisonFAC1vsVarAY(expr) | ||
| asmgen.out(" jsr floats.var_fac1_equal_f") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "!=" -> { | ||
| setupFloatComparisonFAC1vsVarAY(expr) | ||
| asmgen.out(" jsr floats.var_fac1_notequal_f") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "<" -> { | ||
| setupFloatComparisonFAC1vsVarAY(expr) | ||
| asmgen.out(" jsr floats.var_fac1_less_f") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| ">" -> { | ||
| setupFloatComparisonFAC1vsVarAY(expr) | ||
| asmgen.out(" jsr floats.var_fac1_greater_f") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| "<=" -> { | ||
| setupFloatComparisonFAC1vsVarAY(expr) | ||
| asmgen.out(" jsr floats.var_fac1_lesseq_f") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| ">=" -> { | ||
| setupFloatComparisonFAC1vsVarAY(expr) | ||
| asmgen.out(" jsr floats.var_fac1_greatereq_f") | ||
| asmgen.assignRegister(RegisterOrPair.A, assign.target) | ||
| return true | ||
| } | ||
| else -> TODO("float expression operator ${expr.operator}") | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| private fun setupFloatComparisonFAC1vsVarAY(expr: PtBinaryExpression) { | ||
| asmgen.assignExpressionToRegister(expr.left, RegisterOrPair.FAC1, true) | ||
| if(!expr.right.isSimple()) asmgen.pushFAC1() | ||
| asmgen.assignExpressionToVariable(expr.right, "floats.floats_temp_var", DataType.FLOAT) | ||
| if(!expr.right.isSimple()) asmgen.popFAC1() | ||
| asmgen.out(" lda #<floats.floats_temp_var | ldy #>floats.floats_temp_var") | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.