mirror of
https://github.com/deater/dos33fsprogs.git
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139 lines
4.1 KiB
Plaintext
139 lines
4.1 KiB
Plaintext
Original implementation:
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Multiplying 1.0 * 2.0 = 2.0, took 707 cycles
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Multiplying ff.ff * ff.ff = 0.0, took 761 cycles
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Cycles: flying= 162
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 88,179
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Cycles: mode7= 76,077
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Cycles: lookup_map= 33,920
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Cycles: put_sprite= 2,561
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==================================
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Total = 200,971
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Frame Rate = 4.98 fps
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Update Multiply to use zero page addresses:
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Multiplying 1.0 * 2.0 = 2.0, took 616 cycles
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Multiplying ff.ff * ff.ff = 0.0, took 664 cycles
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Cycles: flying= 162
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 76,561
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Cycles: mode7= 76,077
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Cycles: lookup_map= 33,920
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Cycles: put_sprite= 2,561
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===================================
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Total = 189,353
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Frame Rate = 5.28 fps
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Update to use "fast multiply" w 2kB squares table lookup:
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Multiplying 1.0 * 2.0 = 2.0, took 228 cycles
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Multiplying ff.ff * ff.ff = 0.0, took 272 cycles
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Cycles: flying= 162
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 27,041
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Cycles: mode7= 76,077
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Cycles: lookup_map= 33,920
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Cycles: put_sprite= 2,561
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=================================
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Total = 139,833
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Frame Rate = 7.15 fps
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Update to optimize fast multiply (reusing NUM1H, return results in register)
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Multiplying 1.0 * 2.0 = 2.0, took 234 cycles
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Multiplying ff.ff * ff.ff = 0.0, took 278 cycles
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Cycles: flying= 162
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 24,935
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Cycles: mode7= 73,925
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Cycles: lookup_map= 33,920
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Cycles: put_sprite= 2,561
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=================================
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Total = 135,575
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Frame Rate = 7.38 fps
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Add a cache to lookup_map
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Cycles: flying= 162
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 24,935
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Cycles: mode7= 73,445
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Cycles: lookup_map= 24,649
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Cycles: put_sprite= 2,561
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=================================
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Total = 125,824
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Frame Rate = 7.95 fps
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Don't draw sky every frame
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Cycles: flying= 162
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 24,935
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Cycles: mode7= 69,099
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Cycles: lookup_map= 24,649
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Cycles: put_sprite= 2,561
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=================================
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Total = 121,478
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Frame Rate = 8.23 fps
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Move checking if over water out of critical section
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Cycles: flying= 187
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 24,935
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Cycles: mode7= 54,374
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Cycles: lookup_map= 24,712
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Cycles: put_sprite= 2,561
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=================================
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Total = 106,841
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Frame Rate = 9.36 fps
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Move to 40x40 mode
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Cycles: flying= 187
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 49,613
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Cycles: mode7= 123,701
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Cycles: lookup_map= 48,847
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Cycles: put_sprite= 2,561
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=================================
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Total = 224,981
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Frame Rate = 4.44 fps
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Remove some unnecessary zero page copies in the mode7 code
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Cycles: flying= 187
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 49,613
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Cycles: mode7= 141,269
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Cycles: lookup_map= 21,718
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Cycles: put_sprite= 2,561
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================================
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Total = 215,420
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Frame Rate = 4.64 fps
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A few more minor cleanups in the Y loop
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Cycles: flying= 187
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Cycles: getkey= 46
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Cycles: page_flip= 26
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Cycles: multiply= 49,613
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Cycles: mode7= 140,858
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Cycles: lookup_map= 21,718
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Cycles: put_sprite= 2,561
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===============================
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Total = 215,009
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Frame Rate = 4.65 fps
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32*40=12800
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