mandelbrot Intel C #2 program
source code
/* The Computer Language Benchmarks Game
* https://salsa.debian.org/benchmarksgame-team/benchmarksgame/
contributed by Greg Buchholz
*/
#include<stdio.h>
#include <stdlib.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;
}
}
}
}
notes, command-line, and program output
NOTES:
64-bit Ubuntu quad core
Intel(R) oneAPI DPC++/C++ Compiler
2024.1.0.20240308
Thu, 06 Jun 2024 22:00:24 GMT
MAKE:
~/intel/oneapi/compiler/latest/bin/icx -pipe -Wall -O3 -fomit-frame-pointer -march=ivybridge mandelbrot.icx-2.c -o mandelbrot.icx-2.icx_run
rm mandelbrot.icx-2.c
4.79s to complete and log all make actions
COMMAND LINE:
./mandelbrot.icx-2.icx_run 16000
(BINARY) PROGRAM OUTPUT NOT SHOWN