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https://github.com/irmen/prog8.git
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optimize simple word and byte addition/subtraction better
This commit is contained in:
Irmen de Jong
parent
bbf621a8c4
commit
1c97c22eff
@ -1108,10 +1108,17 @@ internal class AssignmentAsmGen(private val program: PtProgram,
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}
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is PtNumber -> {
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assignExpressionToRegister(left, RegisterOrPair.A, dt==DataType.BYTE)
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if(right.number==1.0 && asmgen.isTargetCpu(CpuType.CPU65c02)) {
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if (expr.operator == "+")
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asmgen.out(" inc a")
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else
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asmgen.out(" dec a")
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} else {
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if (expr.operator == "+")
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asmgen.out(" clc | adc #${right.number.toHex()}")
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else
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asmgen.out(" sec | sbc #${right.number.toHex()}")
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}
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assignRegisterByte(target, CpuRegister.A, dt in SignedDatatypes, true)
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return true
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}
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@ -1246,6 +1253,37 @@ internal class AssignmentAsmGen(private val program: PtProgram,
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}
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is PtNumber -> {
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assignExpressionToRegister(left, RegisterOrPair.AY, dt==DataType.WORD)
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if(right.number==1.0 && asmgen.isTargetCpu(CpuType.CPU65c02)) {
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if(expr.operator=="+") {
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asmgen.out("""
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inc a
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bne +
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iny
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+""")
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} else {
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asmgen.out("""
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dec a
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cmp #255
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bne +
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dey
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+""")
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}
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} else if(dt!=DataType.WORD && right.number.toInt() in 0..255) {
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if(expr.operator=="+") {
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asmgen.out("""
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clc
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adc #${right.number.toHex()}
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bcc +
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iny
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+""") } else if(expr.operator=="-") {
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asmgen.out("""
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sec
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sbc #${right.number.toHex()}
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bcs +
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dey
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+""")
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}
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} else {
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if(expr.operator=="+") {
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asmgen.out("""
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clc
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@ -1265,6 +1303,7 @@ internal class AssignmentAsmGen(private val program: PtProgram,
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tay
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txa""")
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}
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}
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assignRegisterpairWord(target, RegisterOrPair.AY)
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return true
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}
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@ -6,8 +6,6 @@ causes compiler error for virtual: just calling txt.cls() gives compile error un
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https://github.com/irmen/prog8/issues/136 (string.find register order issue)
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optimization: for 65c02 sometimes clc adc #1 is generated (for instance for: cx16.r0L = math.sin8u(cx16.r0L+1)), this can be optimized into inc a (always? or not? mind the carry flag!)
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optimization: for 65c02 sometimes tya pha is generated, could be just phy (mind if A gets used afterwards though!) (same for pla tay etcetera?)
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if-optimization:
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@ -9,12 +9,12 @@
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main {
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sub start() {
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; monogfx.lores()
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; demofill()
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; sys.wait(2*60)
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; monogfx.hires()
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; demo1()
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; sys.wait(2*60)
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monogfx.lores()
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demofill()
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sys.wait(2*60)
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monogfx.hires()
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demo1()
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sys.wait(2*60)
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demo2()
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monogfx.textmode()
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157
examples/test.p8
157
examples/test.p8
@ -1,52 +1,133 @@
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%import math
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%import textio
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%zeropage basicsafe
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%option no_sysinit
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main {
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sub start() {
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signed()
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unsigned()
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cx16.r0sL = 127
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cx16.r0sL = bytefunc(cx16.r0sL+1)
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cx16.r0sL = 0
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cx16.r0sL = bytefunc(cx16.r0sL-1)
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cx16.r0sL = 55
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cx16.r0sL = bytefunc(cx16.r0sL+20)
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cx16.r0sL = 55
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cx16.r0sL = bytefunc(cx16.r0sL-20)
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cx16.r0s = $99ff as word
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cx16.r0s = wordfunc(cx16.r0s+1)
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cx16.r0s = $9900 as word
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cx16.r0s = wordfunc(cx16.r0s-1)
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cx16.r0s = -12345
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cx16.r0s = wordfunc(cx16.r0s+100)
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cx16.r0s = -12345
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cx16.r0s = wordfunc(cx16.r0s-100)
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}
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sub signed() {
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byte @shared bvalue = -100
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word @shared wvalue = -20000
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bvalue /= 2 ; TODO should be a simple bit shift?
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wvalue /= 2 ; TODO should be a simple bit shift?
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txt.print_b(bvalue)
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txt.nl()
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txt.print_w(wvalue)
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txt.nl()
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bvalue *= 2
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wvalue *= 2
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txt.print_b(bvalue)
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txt.nl()
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txt.print_w(wvalue)
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sub bytefunc(byte x) -> byte {
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txt.print_ubhex(x as ubyte, true)
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txt.spc()
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txt.print_b(x)
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txt.nl()
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return x
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}
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sub unsigned() {
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ubyte @shared ubvalue = 100
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uword @shared uwvalue = 20000
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ubvalue /= 2
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uwvalue /= 2
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txt.print_ub(ubvalue)
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txt.nl()
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txt.print_uw(uwvalue)
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txt.nl()
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ubvalue *= 2
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uwvalue *= 2
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txt.print_ub(ubvalue)
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txt.nl()
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txt.print_uw(uwvalue)
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sub wordfunc(word x) -> word {
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txt.print_uwhex(x as uword, true)
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txt.spc()
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txt.print_w(x)
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txt.nl()
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return x
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}
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}
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;%import math
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;%import sprites
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;
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;main {
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; word[128] @split xpos_orig
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; word[128] @split ypos_orig
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; word[128] xpos
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; word[128] ypos
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; ubyte[128] tt
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;
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; sub start() {
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; cx16.mouse_config2(1)
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; sprites.set_mousepointer_hand()
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; ubyte sprdat_bank
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; uword sprdat_addr
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; sprdat_bank, sprdat_addr = sprites.get_data_ptr(0)
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;
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; ubyte sprite
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; for sprite in 0 to 127 {
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; sprites.init(sprite, sprdat_bank, sprdat_addr, sprites.SIZE_16, sprites.SIZE_16, sprites.COLORS_256, 0)
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; xpos_orig[sprite] = sprite*$0003 +100 as word
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; ypos_orig[sprite] = sprite*$0002 +100 as word
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; tt[sprite] = math.rnd()
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; }
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;
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; repeat {
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; sys.waitvsync()
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; sprites.pos_batch(0, 128, &xpos, &ypos)
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; for sprite in 0 to 127 {
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; tt[sprite]++
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; xpos[sprite] = xpos_orig[sprite] + math.sin8(tt[sprite])
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; ypos[sprite] = ypos_orig[sprite] + math.cos8(tt[sprite])
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; }
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; }
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; }
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;}
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;
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;
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;;%import textio
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;;%zeropage basicsafe
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;;%option no_sysinit
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;;
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;;main {
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;; sub start() {
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;; signed()
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;; unsigned()
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;; }
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;;
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;; sub signed() {
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;; byte @shared bvalue = -100
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;; word @shared wvalue = -20000
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;;
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;; bvalue /= 2 ; TODO should be a simple bit shift?
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;; wvalue /= 2 ; TODO should be a simple bit shift?
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;;
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;; txt.print_b(bvalue)
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;; txt.nl()
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;; txt.print_w(wvalue)
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;; txt.nl()
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;;
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;; bvalue *= 2
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;; wvalue *= 2
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;;
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;; txt.print_b(bvalue)
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;; txt.nl()
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;; txt.print_w(wvalue)
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;; txt.nl()
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;; }
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;;
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;; sub unsigned() {
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;; ubyte @shared ubvalue = 100
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;; uword @shared uwvalue = 20000
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;;
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;; ubvalue /= 2
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;; uwvalue /= 2
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;;
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;; txt.print_ub(ubvalue)
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;; txt.nl()
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;; txt.print_uw(uwvalue)
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;; txt.nl()
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;;
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;; ubvalue *= 2
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;; uwvalue *= 2
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;;
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;; txt.print_ub(ubvalue)
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;; txt.nl()
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;; txt.print_uw(uwvalue)
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;; txt.nl()
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;; }
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;;}
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