2017-11-24 19:40:50 +00:00
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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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2017-11-25 06:30:22 +00:00
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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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2017-11-24 19:40:50 +00:00
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2017-11-25 06:30:22 +00:00
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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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2017-11-26 02:55:45 +00:00
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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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