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https://github.com/irmen/prog8.git
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added 'callfar' builtin function (for cx16 target) that uses jsrfar to call a routine in banked RAM
This commit is contained in:
Irmen de Jong
parent
bf1b2066b6
commit
1170aed026
@ -518,12 +518,8 @@ internal class AstChecker(private val program: Program,
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override fun visit(addressOf: AddressOf) {
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val variable=addressOf.identifier.targetVarDecl(program)
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if(variable!=null
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&& variable.datatype !in ArrayDatatypes
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&& variable.type!=VarDeclType.MEMORY
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&& variable.struct == null
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&& variable.datatype != DataType.STR && variable.datatype!=DataType.STRUCT)
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errors.err("invalid pointer-of operand type", addressOf.position)
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if(variable!=null && variable.type==VarDeclType.CONST)
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errors.err("invalid pointer-of operand type", addressOf.position)
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super.visit(addressOf)
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}
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@ -144,6 +144,7 @@ private val functionSignatures: List<FSignature> = listOf(
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FSignature("rndf" , false, emptyList(), DataType.FLOAT),
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FSignature("memory" , true, listOf(FParam("name", setOf(DataType.STR)), FParam("size", setOf(DataType.UWORD))), DataType.UWORD),
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FSignature("swap" , false, listOf(FParam("first", NumericDatatypes), FParam("second", NumericDatatypes)), null),
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FSignature("callfar" , false, listOf(FParam("bank", setOf(DataType.UBYTE)), FParam("address", setOf(DataType.UWORD)), FParam("arg", setOf(DataType.UWORD))), null),
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)
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@ -13,6 +13,7 @@ import prog8.ast.toHex
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import prog8.compiler.AssemblyError
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import prog8.compiler.functions.FSignature
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import prog8.compiler.target.CpuType
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import prog8.compiler.target.Cx16Target
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import prog8.compiler.target.cpu6502.codegen.assignment.*
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import prog8.compiler.target.subroutineFloatEvalResultVar2
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@ -65,10 +66,56 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
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"pokew" -> funcPokeW(fcall)
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"poke" -> throw AssemblyError("poke() should have been replaced by @()")
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"cmp" -> funcCmp(fcall)
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"callfar" -> funcCallFar(fcall)
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else -> throw AssemblyError("missing asmgen for builtin func ${func.name}")
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}
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}
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private fun funcCallFar(fcall: IFunctionCall) {
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if(asmgen.options.compTarget !is Cx16Target)
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throw AssemblyError("callfar only works on cx16 target at this time")
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val bank = fcall.args[0].constValue(program)?.number?.toInt()
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val address = fcall.args[1].constValue(program)?.number?.toInt()
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if(bank==null || address==null)
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throw AssemblyError("callfar (jsrfar) requires constant arguments")
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if(address !in 0xa000..0xbfff)
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throw AssemblyError("callfar done on address outside of cx16 banked ram")
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if(bank==0)
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throw AssemblyError("callfar done on bank 0 which is reserved for the kernal")
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val argAddrArg = fcall.args[2]
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if(argAddrArg.constValue(program)?.number == 0) {
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asmgen.out("""
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jsr cx16.jsrfar
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.word ${address.toHex()}
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.byte ${bank.toHex()}""")
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} else {
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when(argAddrArg) {
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is AddressOf -> {
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if(argAddrArg.identifier.targetVarDecl(program)?.datatype != DataType.UBYTE)
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throw AssemblyError("callfar done with 'arg' pointer to variable that's not UBYTE")
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asmgen.out("""
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lda ${asmgen.asmVariableName(argAddrArg.identifier)}
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jsr cx16.jsrfar
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.word ${address.toHex()}
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.byte ${bank.toHex()}
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sta ${asmgen.asmVariableName(argAddrArg.identifier)}""")
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}
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is NumericLiteralValue -> {
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asmgen.out("""
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lda ${argAddrArg.number.toHex()}
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jsr cx16.jsrfar
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.word ${address.toHex()}
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.byte ${bank.toHex()}
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sta ${argAddrArg.number.toHex()}""")
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}
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else -> throw AssemblyError("callfar only accepts pointer-of a (ubyte) variable or constant memory address for the 'arg' parameter")
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}
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}
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}
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private fun funcCmp(fcall: IFunctionCall) {
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val arg1 = fcall.args[0]
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val arg2 = fcall.args[1]
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@ -897,6 +897,15 @@ memory(name, size)
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The return value is just a simple uword address so it cannot be used as an array in your program.
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You can only treat it as a pointer or use it in inline assembly.
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callfar(bank, address, argumentaddress) ; NOTE: specific to cx16 compiler target for now
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Calls an assembly routine in another ram-bank on the CommanderX16 (using the ``jsrfar`` routine)
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The banked RAM is located in the address range $A000-$BFFF (8 kilobyte).
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Notice that bank $00 is used by the Kernal and should not be used by user code.
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The third argument can be used to designate the memory address
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of an argument for the routine; it will be loaded into the A register and will
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receive the result value returned by the routine in the A register. If you leave this at zero,
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no argument passing will be done.
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Library routines
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----------------
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@ -1,23 +1,30 @@
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%import textio
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%import string
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%zeropage dontuse
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%import test_stack
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%zeropage basicsafe
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main {
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sub start() {
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uword zz = $4000
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ubyte uu
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cx16.rambank(1)
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sys.memcopy(&banked.double, $a000, 100)
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cx16.rambank(0)
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txt.nl()
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txt.print("hello")
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txt.print_uwhex(peekw(zz+2), true)
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@(zz+2) = lsb($ea31)
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@(zz+3) = msb($ea31)
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pokew(zz+2, $ea32) ; TODO fix crash
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zz = peekw(zz+2) ; TODO fix crash with asm
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txt.print_uwhex(zz, true)
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uword ww
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uu = 99
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txt.print_ub(uu)
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txt.nl()
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callfar($01, $a000, &uu)
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txt.print_ub(uu)
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}
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}
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banked {
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asmsub double(ubyte number @A) -> ubyte @A {
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%asm {{
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asl a
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rts
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}}
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}
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}
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@ -14,7 +14,7 @@
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<keywords keywords="&;->;@;\$;and;as;asmsub;break;clobbers;do;downto;else;false;for;goto;if;if_cc;if_cs;if_eq;if_mi;if_ne;if_neg;if_nz;if_pl;if_pos;if_vc;if_vs;if_z;in;inline;not;or;repeat;return;romsub;step;sub;to;true;until;when;while;xor;~" ignore_case="false" />
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<keywords2 keywords="%address;%asm;%asmbinary;%asminclude;%breakpoint;%import;%launcher;%option;%output;%target;%zeropage;%zpreserved" />
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<keywords3 keywords="byte;const;float;str;struct;ubyte;uword;void;word;zp" />
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<keywords4 keywords="abs;acos;all;any;asin;atan;avg;ceil;cmp;cos;cos16;cos16u;cos8;cos8u;deg;fastrnd8;floor;len;ln;log2;lsb;lsl;lsr;max;memory;min;mkword;msb;offsetof;peek;peekw;poke;pokew;rad;reverse;rnd;rndf;rndw;rol;rol2;ror;ror2;round;sgn;sin;sin16;sin16u;sin8;sin8u;sizeof;sort;sqrt;sqrt16;sum;swap;tan" />
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<keywords4 keywords="abs;acos;all;any;asin;atan;avg;callfar;ceil;cmp;cos;cos16;cos16u;cos8;cos8u;deg;fastrnd8;floor;len;ln;log2;lsb;lsl;lsr;max;memory;min;mkword;msb;offsetof;peek;peekw;poke;pokew;rad;reverse;rnd;rndf;rndw;rol;rol2;ror;ror2;round;sgn;sin;sin16;sin16u;sin8;sin8u;sizeof;sort;sqrt;sqrt16;sum;swap;tan" />
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</highlighting>
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<extensionMap>
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<mapping ext="p8" />
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@ -17,7 +17,7 @@ syn keyword prog8BuiltInFunc any all len max min reverse sum sort
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" Miscellaneous functions
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syn keyword prog8BuiltInFunc cmp lsb msb mkword peek peekw poke pokew rnd rndw
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syn keyword prog8BuiltInFunc rndf fastrnd8 rol rol2 ror ror2 sizeof offsetof
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syn keyword prog8BuiltInFunc swap memory
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syn keyword prog8BuiltInFunc swap memory callfar
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" c64/floats.p8
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