Intel ISPC a C++ – C / C++ – Fórum – Programujte.com

https://ispc.github.io/

caute, robil ste uz niekto v ispc? Nejak som ho uz rozbehal (pod linuxom) ale pri spustani samotnych prikladov mam problem.

skusil som jednoduchy priklad mandelbrot:
https://ispc.github.io/example.html

mandelbrot.cpp

int main() {
    unsigned int width = 768, height = 512;
    float x0 = -2., x1 = 1.;
    float y0 = -1., y1 = 1.;
    int maxIterations = 256;
    int *buf = new int[width*height];

    mandelbrot_ispc(x0, y0, x1, y1, width, height, maxIterations, buf);

    // write output...
}

mandelbrot.ispc

static inline int mandel(float c_re, float c_im, int count) {
    float z_re = c_re, z_im = c_im;
    int i;
    for (i = 0; i < count; ++i) {
        if (z_re * z_re + z_im * z_im > 4.)
            break;
        float new_re = z_re*z_re - z_im*z_im;
        float new_im = 2.f * z_re * z_im;
        z_re = c_re + new_re;
        z_im = c_im + new_im;
    }
    return i;
}

export void mandelbrot_ispc(uniform float x0, uniform float y0, 
                            uniform float x1, uniform float y1,
                            uniform int width, uniform int height, 
                            uniform int maxIterations,
                            uniform int output[]) {
    float dx = (x1 - x0) / width;
    float dy = (y1 - y0) / height;
    for (uniform int j = 0; j < height; j++) {
        foreach (i = 0 ... width) {
            float x = x0 + i * dx;
            float y = y0 + j * dy;
            int index = j * width + i;
            output[index] = mandel(x, y, maxIterations);
        }
    }
}

príkaz:
 

ispc -O2 --target=avx mandelbrot.ispc -o objs/mandelbrot_ispc.o -h         objs/mandelbrot_ispc.h

zbehne a vytvori co ma, ale nasledujuci
 

g++ mandelbrot.cpp -Iobjs/ -O3 -Wall -c -o objs/mandelbrot.o

hodi chybu

mandelbrot.cpp: In function ‘int main()’:
mandelbrot.cpp:8:70: error: ‘mandelbrot_ispc’ was not declared in this scope
     mandelbrot_ispc(x0, y0, x1, y1, width, height, maxIterations, buf);
.....................................................................................................^

Co nechapem.

Skusil som mandelbrot stiahnut z githubu:
https://github.com/…s/mandelbrot
a pri tom druhom prikaze mi vyhadzuje:

mandelbrot.cpp: In function ‘int main(int, char**)’:
mandelbrot.cpp:102:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < test_iterations[0]; ++i) {
                                          ^
mandelbrot.cpp:103:31: error: ‘reset_and_start_timer’ was not declared in this scope
         reset_and_start_timer();
                               ^
mandelbrot.cpp:105:41: error: ‘get_elapsed_mcycles’ was not declared in this scope
         double dt = get_elapsed_mcycles();
                                         ^
mandelbrot.cpp:122:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < test_iterations[1]; ++i) {
                                          ^
mandelbrot.cpp:123:31: error: ‘reset_and_start_timer’ was not declared in this scope
         reset_and_start_timer();
                               ^
mandelbrot.cpp:125:41: error: ‘get_elapsed_mcycles’ was not declared in this scope
         double dt = get_elapsed_mcycles();
                                         ^