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flipped the order of the parameters of mkword() so it's now mkword(msb, lsb) for easier readability

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This commit is contained in:
Irmen de Jong 2020-08-22 21:08:29 +02:00
parent f41192a52a
commit bd9ebf4603
9 changed files with 25 additions and 28 deletions
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2
compiler/src/prog8/compiler/Main.kt
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@ -193,7 +193,7 @@ private fun writeAssembly(programAst: Program, errors: ErrorReporter, outputDir:
programAst.processAstBeforeAsmGeneration(errors)
errors.handle()
// printAst(programAst)
printAst(programAst)
val assembly = CompilationTarget.asmGenerator(
programAst,

4
compiler/src/prog8/compiler/target/c64/codegen/BuiltinFunctionsAsmGen.kt
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@ -448,7 +448,9 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
}
private fun funcMkword(fcall: IFunctionCall, func: FSignature) {
translateFunctionArguments(fcall.args, func)
// trick: push the args in reverse order (msb first, lsb second) this saves some instructions
asmgen.translateExpression(fcall.args[1])
asmgen.translateExpression(fcall.args[0])
asmgen.out(" inx | lda $ESTACK_LO_HEX,x | sta $ESTACK_HI_PLUS1_HEX,x")
}

8
compiler/src/prog8/functions/BuiltinFunctions.kt
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@ -63,7 +63,7 @@ val BuiltinFunctions = mapOf(
"all" to FSignature(true, listOf(FParam("values", ArrayDatatypes)), DataType.UBYTE) { a, p, prg -> collectionArg(a, p, prg, ::builtinAll) },
"lsb" to FSignature(true, listOf(FParam("value", setOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE) { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> x and 255 }},
"msb" to FSignature(true, listOf(FParam("value", setOf(DataType.UWORD, DataType.WORD))), DataType.UBYTE) { a, p, prg -> oneIntArgOutputInt(a, p, prg) { x: Int -> x ushr 8 and 255}},
"mkword" to FSignature(true, listOf(FParam("lsb", setOf(DataType.UBYTE)), FParam("msb", setOf(DataType.UBYTE))), DataType.UWORD, ::builtinMkword),
"mkword" to FSignature(true, listOf(FParam("msb", setOf(DataType.UBYTE)), FParam("lsb", setOf(DataType.UBYTE))), DataType.UWORD, ::builtinMkword),
"rnd" to FSignature(true, emptyList(), DataType.UBYTE),
"rndw" to FSignature(true, emptyList(), DataType.UWORD),
"rndf" to FSignature(true, emptyList(), DataType.FLOAT),
@ -323,9 +323,9 @@ private fun builtinLen(args: List<Expression>, position: Position, program: Prog
private fun builtinMkword(args: List<Expression>, position: Position, program: Program): NumericLiteralValue {
if (args.size != 2)
throw SyntaxError("mkword requires lsb and msb arguments", position)
val constLsb = args[0].constValue(program) ?: throw NotConstArgumentException()
val constMsb = args[1].constValue(program) ?: throw NotConstArgumentException()
throw SyntaxError("mkword requires msb and lsb arguments", position)
val constMsb = args[0].constValue(program) ?: throw NotConstArgumentException()
val constLsb = args[1].constValue(program) ?: throw NotConstArgumentException()
val result = (constMsb.number.toInt() shl 8) or constLsb.number.toInt()
return NumericLiteralValue(DataType.UWORD, result, position)
}

4
compiler/src/prog8/optimizer/ExpressionSimplifier.kt
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@ -586,10 +586,10 @@ internal class ExpressionSimplifier(private val program: Program) : AstWalker()
} else if (amount >= 8) {
val lsb = TypecastExpression(expr.left, DataType.UBYTE, true, expr.position)
if (amount == 8) {
return FunctionCall(IdentifierReference(listOf("mkword"), expr.position), mutableListOf(NumericLiteralValue.optimalInteger(0, expr.position), lsb), expr.position)
return FunctionCall(IdentifierReference(listOf("mkword"), expr.position), mutableListOf(lsb, NumericLiteralValue.optimalInteger(0, expr.position)), expr.position)
}
val shifted = BinaryExpression(lsb, "<<", NumericLiteralValue.optimalInteger(amount - 8, expr.position), expr.position)
return FunctionCall(IdentifierReference(listOf("mkword"), expr.position), mutableListOf(NumericLiteralValue.optimalInteger(0, expr.position), shifted), expr.position)
return FunctionCall(IdentifierReference(listOf("mkword"), expr.position), mutableListOf(shifted, NumericLiteralValue.optimalInteger(0, expr.position)), expr.position)
}
}
else -> {

5
docs/source/programming.rst
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@ -748,8 +748,9 @@ msb(x)
sgn(x)
Get the sign of the value. Result is -1, 0 or 1 (negative, zero, positive).
mkword(lsb, msb)
Efficiently create a word value from two bytes (the lsb and the msb). Avoids multiplication and shifting.
mkword(msb, lsb)
Efficiently create a word value from two bytes (the msb and the lsb). Avoids multiplication and shifting.
So mkword($80, $22) results in $8022.
any(x)
1 ('true') if any of the values in the array value x is 'true' (not zero), else 0 ('false')

2
examples/cube3d-sprites.p8
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@ -159,7 +159,7 @@ main {
ubyte sx = rotatedx[i] / persp + width/2 as ubyte + 20
ubyte sy = rotatedy[i] / persp + height/2 as ubyte + 40
c64.SPXYW[i] = mkword(sx, sy)
c64.SPXYW[i] = mkword(sy, sx)
if(zc < 30*128)
c64.SPRPTR[i] = $2000/64 +1 ; large ball

2
examples/hello.p8
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@ -27,7 +27,7 @@ main {
c64.CHROUT(bye[char])
float clock_seconds = ((mkword(c64.TIME_LO, c64.TIME_MID) as float) + (c64.TIME_HI as float)*65536.0) / 60
float clock_seconds = ((mkword(c64.TIME_MID, c64.TIME_LO) as float) + (c64.TIME_HI as float)*65536.0) / 60
float hours = floor(clock_seconds / 3600)
clock_seconds -= hours*3600
float minutes = floor(clock_seconds / 60)

19
examples/test.p8
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@ -8,19 +8,14 @@ main {
sub start() {
ubyte ub
uword uw
word w
byte b
float f
uword uw = $ee44
ubyte vlsb = $11
ubyte vmsb = $ff
ub = 4 | ub | 2
ub = ub | 2 | 7
ub = 4 | 2 | ub
ub = 4 + ub + 2
ub = ub + 2 + 7
ub = 4 + 2 + ub
uw = mkword(vmsb, vlsb) ; todo flip the order of the operands , MSB first
c64scr.print_uwhex(uw, 1)
uw = mkword($ee, $22) ; todo flip the order of the operands , MSB first
c64scr.print_uwhex(uw, 1)
}
}

7
examples/wizzine.p8
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@ -47,18 +47,17 @@ irq {
ubyte angle
sub irq() {
c64.EXTCOL--
angle++
c64.MSIGX=0
ubyte @zp spri
for spri in 7 downto 0 {
c64.EXTCOL++
uword @zp x = sin8u(angle*2-spri*16) as uword + 50
ubyte @zp y = cos8u(angle*3-spri*16) / 2 + 70
c64.SPXYW[spri] = mkword(lsb(x), y)
c64.SPXYW[spri] = mkword(y, lsb(x))
c64.MSIGX <<= 1
if msb(x) c64.MSIGX++
c64.EXTCOL++
}
c64.EXTCOL-=7
c64.EXTCOL-=8
}
}