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Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/shootout/mandelbrot.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/shootout/mandelbrot.c b/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/shootout/mandelbrot.c new file mode 100644 index 0000000..9fac37a --- /dev/null +++ b/dependencies/pkg/mod/golang.org/x/exp@v0.0.0-20220613132600-b0d781184e0d/shootout/mandelbrot.c @@ -0,0 +1,93 @@ +// +build ignore + +/* +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + + * Neither the name of "The Computer Language Benchmarks Game" nor the + name of "The Computer Language Shootout Benchmarks" nor the names of + its contributors may be used to endorse or promote products derived + from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE +LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +POSSIBILITY OF SUCH DAMAGE. +*/ + +/* The Computer Language Shootout + http://shootout.alioth.debian.org/ + + contributed by Greg Buchholz + + for the debian (AMD) machine... + compile flags: -O3 -ffast-math -march=athlon-xp -funroll-loops + + for the gp4 (Intel) machine... + compile flags: -O3 -ffast-math -march=pentium4 -funroll-loops +*/ + +#include<stdio.h> + +int main (int argc, char **argv) +{ + int w, h, bit_num = 0; + char byte_acc = 0; + int i, iter = 50; + double x, y, limit = 2.0; + double Zr, Zi, Cr, Ci, Tr, Ti; + + w = h = atoi(argv[1]); + + printf("P4\n%d %d\n",w,h); + + for(y=0;y<h;++y) + { + for(x=0;x<w;++x) + { + Zr = Zi = Tr = Ti = 0.0; + Cr = (2.0*x/w - 1.5); Ci=(2.0*y/h - 1.0); + + for (i=0;i<iter && (Tr+Ti <= limit*limit);++i) + { + Zi = 2.0*Zr*Zi + Ci; + Zr = Tr - Ti + Cr; + Tr = Zr * Zr; + Ti = Zi * Zi; + } + + byte_acc <<= 1; + if(Tr+Ti <= limit*limit) byte_acc |= 0x01; + + ++bit_num; + + if(bit_num == 8) + { + putc(byte_acc,stdout); + byte_acc = 0; + bit_num = 0; + } + else if(x == w-1) + { + byte_acc <<= (8-w%8); + putc(byte_acc,stdout); + byte_acc = 0; + bit_num = 0; + } + } + } +} |