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all in-place byte assignments now without translateExpression()

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Irmen de Jong 2020-11-22 01:31:29 +01:00
parent 5980e58ac6
commit d1febc0208
2 changed files with 13 additions and 24 deletions
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36
compiler/src/prog8/compiler/target/c64/codegen/assignment/AugmentableAssignmentAsmGen.kt
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@ -423,16 +423,12 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
when (operator) {
// note: ** (power) operator requires floats.
"+" -> {
if(asmgen.options.slowCodegenWarnings)
println("warning: slow stack evaluation used (5): $name $operator= ${value::class.simpleName} at ${value.position}") // TODO
asmgen.translateExpression(value)
asmgen.out(" lda $name | clc | adc P8ESTACK_LO+1,x | sta $name | inx")
asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
asmgen.out(" clc | adc $name | sta $name")
}
"-" -> {
if(asmgen.options.slowCodegenWarnings)
println("warning: slow stack evaluation used (5): $name $operator= ${value::class.simpleName} at ${value.position}") // TODO
asmgen.translateExpression(value)
asmgen.out(" lda $name | sec | sbc P8ESTACK_LO+1,x | sta $name | inx")
asmgen.assignExpressionToVariable(value, "P8ZP_SCRATCH_B1", dt, null)
asmgen.out(" lda $name | sec | sbc P8ZP_SCRATCH_B1 | sta $name")
}
"*" -> {
asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
@ -448,10 +444,8 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
"%" -> {
if(dt==DataType.BYTE)
throw AssemblyError("remainder of signed integers is not properly defined/implemented, use unsigned instead")
if(asmgen.options.slowCodegenWarnings)
println("warning: slow stack evaluation used (5): $name $operator= ${value::class.simpleName} at ${value.position}") // TODO
asmgen.translateExpression(value)
asmgen.out(" lda P8ESTACK_LO+1,x | tay | lda $name | jsr math.divmod_ub_asm | sta $name | inx")
asmgen.assignExpressionToRegister(value, RegisterOrPair.Y)
asmgen.out(" lda $name | jsr math.divmod_ub_asm | sta $name")
}
"<<" -> {
asmgen.assignExpressionToRegister(value, RegisterOrPair.Y)
@ -483,22 +477,16 @@ internal class AugmentableAssignmentAsmGen(private val program: Program,
}
}
"&" -> {
if(asmgen.options.slowCodegenWarnings)
println("warning: slow stack evaluation used (5): $name $operator= ${value::class.simpleName} at ${value.position}") // TODO
asmgen.translateExpression(value)
asmgen.out(" lda $name | and P8ESTACK_LO+1,x | sta $name | inx")
asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
asmgen.out(" and $name | sta $name")
}
"^" -> {
if(asmgen.options.slowCodegenWarnings)
println("warning: slow stack evaluation used (5): $name $operator= ${value::class.simpleName} at ${value.position}") // TODO
asmgen.translateExpression(value)
asmgen.out(" lda $name | eor P8ESTACK_LO+1,x | sta $name | inx")
asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
asmgen.out(" eor $name | sta $name")
}
"|" -> {
if(asmgen.options.slowCodegenWarnings)
println("warning: slow stack evaluation used (5): $name $operator= ${value::class.simpleName} at ${value.position}") // TODO
asmgen.translateExpression(value)
asmgen.out(" lda $name | ora P8ESTACK_LO+1,x | sta $name | inx")
asmgen.assignExpressionToRegister(value, RegisterOrPair.A)
asmgen.out(" ora $name | sta $name")
}
else -> throw AssemblyError("invalid operator for in-place modification $operator")
}

1
docs/source/todo.rst
View File

@ -4,6 +4,7 @@ TODO
- check cpu stack consistency in all examples
- reduce the amount of translateExpression() calls when the result can be directly assigned to register or variable
- cc = xbuf[i] + ybuf[ii] generates unnecessary stack push/pulls (and no slow warning is given for it)
- make it possible to use cpu opcodes such as 'nop' as variable names by prefixing all asm vars with something such as '_'
- option to load the built-in library files from a directory instead of the embedded ones (for easier library development/debugging)
- see if we can group some errors together for instance the (now single) errors about unidentified symbols