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WP-34S N-Queens Benchmark Based on Patrice Torchet's BITMAP Solution
10-12-2014, 11:38 PM (This post was last modified: 10-15-2014 11:09 PM by iceman.)
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WP-34S N-Queens Benchmark Based on Patrice Torchet's BITMAP Solution
First of all, thanks to forum member Patrice for sharing a work in progress (His source code for the HP-16C N-Queen's Benchmark).

I have ported this code to the bit commands of the WP-34S which has resulted in doubling the speed of the N-Queens solution over the traditional WP-34S N-Queens benchmark.

Set Wordsize to 32.

Here is the code, starts at memory location 32. I also attach a .dat file so that this code can be loaded into the emulator:

Code:
    WP-34S    
============    
32    [f] LBL C        
33    [f] BASE 16        
34    3        
35    STO I        
36    [h] CLx        
37    STO 00    //Count    
38    1        
39    0        
40    1        
41    0        
42    1        
43    0        
44    1        
45    STO 02    //Queen    
46    8        
47    STO 01    //Line    
48    [h] MASKR->X        
49    X~Y        //Mask width specifier got pushed onto stack above the mask
50    R Dn        //Get rid of it
51    [h] SL 01        
52    STO -> I    //Mask    
53    8        
54    [h] X~I        
55    X~Y        
56    [f] LBL 02    //Byte to be tested is in Y.  Bit to test ins in I
57    INC  00    //Count    First increment the line counter        
58    [h] BS?->I        
59    [h] GTO 05                    
60    [f] LBL 03        
61    [h] DSZ I        
62    [h] GTO 02        
63    X~Y        
64    [h] X~I                    
65    INC  01    //Line    
66    [h] DSZ I        
67    RCL->I        
68    [h] DSZ I        
69    RCL->I        
70    X~Y        
71    [h] X~I        
72    X~Y        
73    [h] GTO 03                
74    [f] LBL 05        
75    X~Y        
76    [h] X~I        
77    RCL 02            //Queen    
78    X~Y        
79    [h] ISZ I        
80    STO->I        
81    STO J        //Save the rotation count in the "TEST" register
82    R Dn                //Get rid of it, and pull the rotation candidate into X
83    [h] RL->J        //Rotate by the rotation count. TODO might be better way to do this: RL -> -> I Then could drop two lines above
84    [h] OR                
85    DEC 01             //Line.    Note: Might be better way to do this like: DSZ
86    RCL 01        
87    [f] x=0?            //Are we done?    
88    [h] GTO 04    //Yes Done: Terminate    
89    R Dn                    //No, Not done    
90    RCL 03              //Mask    
91    [h] NOT        
92    [h] AND                
93    [h] RR 09                
94    [h] RRC 08        
95    [h] RL 16        
96    [h] RLC 08            
97    [h] RR 07        
98    ENTER        
99    ENTER        
100    ENTER                
101    [h] RL 08        
102    [h] OR        
103    ENTER                    
104    [h] RL 16        
105    [h] OR        
106    RCL 03    //Mask    
107    [h] AND        
108    RCL L        
109    [h] XOR        
110    [f] X=0?        
111    [h] GTO 06        
112    [h] OR        
113    [h] ISZ I        
114    STO->I        
115    8        
116    [h] X~I        
117    X~Y        
118    [h] GTO 02                
119    [f] LBL 06                
120    8                
121    STO + 00    //Count.    Increment count by 8
122    INC 01    //Line    Increment Line count by 1
123    RCL->I        
124    [h] DSZ I        
125    RCL->I        
126    X~Y        
127    [h] X~I        
128    X~Y        
129    [h] GTO 03                
130    [f] LBL 04        
131    RCL 00    //Count    
132    [g] RTN    //Solution: 8 4 1 3 6 2 7 5 In every second register above 3


Attached File(s)
.txt  wp34s.dat.txt (Size: 2 KB / Downloads: 4)
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WP-34S N-Queens Benchmark Based on Patrice Torchet's BITMAP Solution - iceman - 10-12-2014 11:38 PM
IMPROVED 30% over previous post - iceman - 10-15-2014, 06:39 PM



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