[程序加速优化实验kernels.c.doc

/******************************************************** * Kernels to be optimized for the CS:APP Performance Lab ********************************************************/ #include stdio.h #include stdlib.h #include defs.h /* * Please fill in the following team struct */ team_t team = { 5120379091, /* Student ID */ Gao Ce, /* Your Name */ gaoce270863799@se.sjtu.edu.cn, /* First member email address */ , /* Second member full name (leave blank if none) */ /* Second member email addr (leave blank if none) */ }; /*************** * ROTATE KERNEL ***************/ /****************************************************** * Your different versions of the rotate kernel go here ******************************************************/ /* *Add the description of your Rotate implementation here!!! *1. Brief Intro of method *2. CPE Achieved *3. other words */ /* * naive_rotate - The naive baseline version of rotate */ char naive_rotate_descr[] = naive_rotate: Naive baseline implementation; void naive_rotate(int dim, pixel *src, pixel *dst) { int i, j; for (i = 0; i dim; i++) for (j = 0; j dim; j++) dst[RIDX(dim-1-j, i, dim)] = src[RIDX(i, j, dim)]; } /* * rotate - Your current working version of rotate * IMPORTANT: This is the version you will be graded on */ char rotate_descr[] = rotate: Current working version; void rotate(int dim, pixel *src, pixel *dst) { int i, j; dst += (dim-1)*dim; for (i = 0; i dim; i+=32){ for (j = 0; j dim; j++){ *dst=*src; src+=dim; dst+=1; *dst=*src; src+=dim; dst+=1; *dst=*src; src+=dim; dst+=1; *dst=*src; src+=dim; dst+=1; *dst=*src; src+=dim;