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https://github.com/robmcmullen/asmgen.git
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Added option to clobber registers in sprite code
* caller has to save what they need, but saves 26 cycles
This commit is contained in:
parent
6dfab0efb5
commit
18101794b9
10
HiSprite.py
10
HiSprite.py
@ -203,7 +203,7 @@ class Listing(object):
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class Sprite(Listing):
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backing_store_sizes = set()
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def __init__(self, pngfile, assembler, screen, xdraw=False, use_mask=False, backing_store=False, processor="any", name=""):
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def __init__(self, pngfile, assembler, screen, xdraw=False, use_mask=False, backing_store=False, clobber=False, processor="any", name=""):
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Listing.__init__(self, assembler)
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self.screen = screen
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@ -213,6 +213,7 @@ class Sprite(Listing):
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self.xdraw = xdraw
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self.use_mask = use_mask
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self.backing_store = backing_store
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self.clobber = clobber
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self.processor = processor
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if not name:
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name = os.path.splitext(pngfile)[0]
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@ -267,6 +268,7 @@ class Sprite(Listing):
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self.asm("pla")
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def jump65C02(self):
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if not self.clobber:
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self.save_axy_65C02()
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self.asm("ldy PARAM0")
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self.asm("ldx MOD%d_%d,y" % (self.screen.numShifts, self.screen.bitsPerPixel))
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@ -280,6 +282,7 @@ class Sprite(Listing):
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self.addr("%s_SHIFT%d" % (self.slug, shift))
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def jump6502(self):
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if not self.clobber:
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self.save_axy_6502()
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self.asm("ldy PARAM0")
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self.asm("ldx MOD%d_%d,y" % (self.screen.numShifts, self.screen.bitsPerPixel))
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@ -320,6 +323,7 @@ class Sprite(Listing):
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cycleCount, optimizationCount = self.generateBlitter(colorStreams, maskStreams, cycleCount)
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if not self.clobber:
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if self.processor == "any":
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self.out(".ifpC02")
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self.restore_axy_65C02()
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@ -332,6 +336,7 @@ class Sprite(Listing):
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self.restore_axy_6502()
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else:
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raise RuntimeError("Processor %s not supported" % self.processor)
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self.out()
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self.asm("rts")
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self.comment("Cycle count: %d, Optimized %d rows." % (cycleCount,optimizationCount))
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@ -698,6 +703,7 @@ if __name__ == "__main__":
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parser.add_argument("-p", "--processor", default="any", choices=["any","6502", "65C02"], help="Processor type (default: %(default)s)")
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parser.add_argument("-s", "--screen", default="hgrcolor", choices=["hgrcolor","hgrbw"], help="Screen format (default: %(default)s)")
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parser.add_argument("-n", "--name", default="", help="Name for generated assembly function (default: based on image filename)")
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parser.add_argument("-k", "--clobber", action="store_true", default=False, help="don't save the registers on the stack")
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parser.add_argument("-o", "--output-prefix", default="", help="Base name to create a set of output files. If not supplied, all code will be sent to stdout.")
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parser.add_argument("files", metavar="IMAGE", nargs="*", help="a PNG image [or a list of them]. PNG files must not have an alpha channel!")
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options, extra_args = parser.parse_known_args()
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@ -725,7 +731,7 @@ if __name__ == "__main__":
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for pngfile in options.files:
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try:
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listings.append(Sprite(pngfile, assembler, screen, options.xdraw, options.mask, options.backing_store, options.processor, options.name))
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listings.append(Sprite(pngfile, assembler, screen, options.xdraw, options.mask, options.backing_store, options.clobber, options.processor, options.name))
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except RuntimeError, e:
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print "%s: %s" % (pngfile, e)
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sys.exit(1)
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@ -29,7 +29,7 @@ colortest.dsk: HiSprite.py colortest.s bwsprite.s
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atrcopy colortest.dsk boot -b colortest.xex --brun 6000 -f
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multitest-sprite-driver.s: HiSprite.py $(BWSPRITE)
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python HiSprite.py -a mac65 -p 6502 -s hgrbw -m -b -o multitest $(BWSPRITE) $(COLORSPRITE)
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python HiSprite.py -a mac65 -p 6502 -s hgrbw -m -b -k -o multitest $(BWSPRITE) $(COLORSPRITE)
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multitest.dsk: HiSprite.py multitest.s multitest-sprite-driver.s
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atasm -omultitest.xex multitest.s -Lmultitest.var -gmultitest.lst
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BIN
multitest.dsk
BIN
multitest.dsk
Binary file not shown.
@ -57,8 +57,10 @@ initsprites
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; Draw sprites by looping through the list of sprites
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renderstart
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ldy #0
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sty PARAM3
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renderloop
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ldy PARAM3
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lda sprite_active,y
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bmi renderend ; end of list if negative
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beq renderskip ; skip if zero
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@ -74,7 +76,7 @@ renderloop
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jsrsprite
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jsr $ffff ; wish you could JSR ($nnnn)
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renderskip
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iny
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inc PARAM3
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bne renderloop ; branch always because always positive; otherwise limited to 255 sprites (haha)
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renderend
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