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https://github.com/irmen/prog8.git
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tweaked repeat
This commit is contained in:
Irmen de Jong
parent
9f047ba752
commit
dd2c436dc6
@ -966,12 +966,10 @@ internal class AsmGen(private val program: Program,
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val name = asmVariableName(stmt.iterations as IdentifierReference)
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when(vardecl.datatype) {
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DataType.UBYTE, DataType.BYTE -> {
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out(" lda $name")
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repeatByteCountInA(null, repeatLabel, endLabel, stmt.body)
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repeatByteCountVar(name, repeatLabel, endLabel, stmt.body)
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}
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DataType.UWORD, DataType.WORD -> {
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out(" lda $name | ldy $name+1")
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repeatWordCountInAY(null, repeatLabel, endLabel, stmt.body)
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repeatWordCountVar(name, repeatLabel, endLabel, stmt.body)
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}
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else -> throw AssemblyError("invalid loop variable datatype $vardecl")
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}
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@ -1001,6 +999,7 @@ internal class AsmGen(private val program: Program,
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if(constIterations==0)
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return
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// note: A/Y must have been loaded with the number of iterations already!
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// TODO can be even more optimized by iterating over pages
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val counterVar = makeLabel("repeatcounter")
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out("""
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sta $counterVar
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@ -1035,22 +1034,54 @@ $counterVar .word 0""")
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val counterVar = makeLabel("repeatcounter")
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if(constIterations==null)
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out(" beq $endLabel")
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out("""
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sta $counterVar
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$repeatLabel""")
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out(" sta $counterVar")
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out(repeatLabel)
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translate(body)
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out("""
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dec $counterVar
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bne $repeatLabel
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beq $endLabel""")
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if(constIterations!=null && constIterations>=16 && zeropage.available() > 0) {
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// allocate count var on ZP
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val zpAddr = zeropage.allocate(counterVar, DataType.UBYTE, body.position, errors)
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out("""$counterVar = $zpAddr ; auto zp UBYTE""")
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} else {
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out("""
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beq $endLabel
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$counterVar .byte 0""")
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}
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out(endLabel)
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}
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private fun repeatByteCountVar(repeatCountVar: String, repeatLabel: String, endLabel: String, body: AnonymousScope) {
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// note: cannot use original counter variable because it should retain its original value
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val counterVar = makeLabel("repeatcounter")
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out(" lda $repeatCountVar | beq $endLabel | sta $counterVar")
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out(repeatLabel)
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translate(body)
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out(" dec $counterVar | bne $repeatLabel")
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// inline countervar:
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out("""
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beq $endLabel
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$counterVar .byte 0""")
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out(endLabel)
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}
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private fun repeatWordCountVar(repeatCountVar: String, repeatLabel: String, endLabel: String, body: AnonymousScope) {
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// TODO can be even more optimized by iterating over pages
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// note: cannot use original counter variable because it should retain its original value
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val counterVar = makeLabel("repeatcounter")
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out("""
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lda $repeatCountVar
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sta $counterVar
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ora $repeatCountVar+1
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beq $endLabel
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lda $repeatCountVar+1
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sta $counterVar+1""")
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out(repeatLabel)
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translate(body)
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out("""
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lda $counterVar
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bne +
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dec $counterVar+1
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+ dec $counterVar
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lda $counterVar
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ora $counterVar+1
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bne $repeatLabel
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beq $endLabel
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$counterVar .word 0""")
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out(endLabel)
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}
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@ -2,15 +2,13 @@
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TODO
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====
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- add any2(), all2(), max2(), min2(), reverse2(), sum2(), sort2() that take (array, startindex, length) arguments
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- optimize for loop iterations better to allow proper inx, cpx #value, bne loop instructions (like repeat loop)
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- why is there a beq _prog8_label_2_repeatend at the end of repeat loops? seems unused
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- optimize swap of two memread values with index, using the same pointer expression/variable, like swap(@(ptr+1), @(ptr+2))
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- implement the linked_list millfork benchmark
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- use the 65c02 bit clear/set/test instructions for single-bit operations
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- implement highres 4 color mode in gfx2
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- make a retro Amiga Workbench "simulator" using that new gfx mode
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- use the 65c02 bit clear/set/test instructions for single-bit operations
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- add a flood fill routine to gfx2
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- can we get rid of the --longOptionName command line options and only keep the short versions? https://github.com/Kotlin/kotlinx-cli/issues/50
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- add a f_seek() routine for the Cx16 that uses its seek dos api?
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@ -5,6 +5,12 @@ main {
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sub start() {
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txt.print("hello\n")
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uword xx
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uword iter = 256
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repeat iter {
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xx++
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}
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txt.print_uw(xx)
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}
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}
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@ -11,7 +11,7 @@
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<option name="HAS_PARENS" value="true" />
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<option name="HAS_STRING_ESCAPES" value="true" />
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</options>
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<keywords keywords="&;->;@;\$;and;as;asmsub;break;clobbers;continue;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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<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;cos;cos16;cos16u;cos8;cos8u;deg;floor;len;ln;log2;lsb;lsl;lsr;max;memory;min;mkword;msb;offsetof;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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