[llvm-commits] CVS: llvm-test/SingleSource/Benchmarks/Misc-C++/mandel-text.cpp

[Chris Lattner]

Changes in directory llvm-test/SingleSource/Benchmarks/Misc-C++:

mandel-text.cpp added (r1.1)
---
Log message:

new testcase to generate an ascii-art mandlebrot


---
Diffs of the changes:  (+61 -0)

 mandel-text.cpp |   61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 61 insertions(+)


Index: llvm-test/SingleSource/Benchmarks/Misc-C++/mandel-text.cpp
diff -c /dev/null llvm-test/SingleSource/Benchmarks/Misc-C++/mandel-text.cpp:1.1
*** /dev/null	Sat Sep 24 23:40:00 2005
--- llvm-test/SingleSource/Benchmarks/Misc-C++/mandel-text.cpp	Sat Sep 24 23:39:49 2005
***************
*** 0 ****
--- 1,61 ----
+ #include <stdio.h>
+ int main()
+ {
+     // output size
+     int rows = 40, cols = 78;
+ 
+     // number of iterations before we quit
+     int maxiter = 255;
+ 
+     int slowdown = 2000;
+ 
+     // size and position of the rect on the imaginary plane
+     double fViewRectReal = -2.3, fViewRectImg = -1.0;
+     double fMagLevel = 0.05;
+ 
+     for (int y=0; y < rows; y++)
+     {
+         // imaginary component of "c"
+         double fCImg = fViewRectImg + y * fMagLevel;
+         
+         for (int x=0; x < cols; x++)
+         {
+             // real component of "c"
+             bool bInside;
+             int n;
+            
+             for (int SLOW = 0; SLOW < slowdown; ++SLOW) {
+             double fCReal = fViewRectReal + x * fMagLevel;
+             double fZReal = fCReal;
+             double fZImg = fCImg;
+               bInside = true;
+  
+               // apply the formula...
+               for (n=0; n < maxiter; n++) {
+                 double fZRealSquared = fZReal * fZReal;
+                 double fZImgSquared = fZImg * fZImg;
+ 
+                 // have we escaped?
+                 if (fZRealSquared + fZImgSquared > 4) {
+                     bInside = false;
+                     break;
+                 }
+ 
+                 // z = z^2 + c
+                 fZImg = 2 * fZReal * fZImg + fCImg;
+                 fZReal = fZRealSquared - fZImgSquared + fCReal;
+               }
+             }
+ 
+             if (bInside)
+                 putchar(' ');
+             else if (n > 4)
+                 putchar('.');
+             else if (n > 2)
+                 putchar('+');
+             else
+                 putchar('*');
+         }
+         putchar('\n');
+     }
+ }