2 * GF-Complete: A Comprehensive Open Source Library for Galois Field Arithmetic
3 * James S. Plank, Ethan L. Miller, Kevin M. Greenan,
4 * Benjamin A. Arnold, John A. Burnum, Adam W. Disney, Allen C. McBride.
8 * Demonstrating altmap and extract_word
18 #include "gf_complete.h"
23 fprintf(stderr, "usage: gf_example_5\n");
27 int main(int argc, char **argv)
33 if (gf_init_hard(&gf, 16, GF_MULT_SPLIT_TABLE, GF_REGION_ALTMAP, GF_DIVIDE_DEFAULT,
34 0, 16, 4, NULL, NULL) == 0) {
35 fprintf(stderr, "gf_init_hard failed\n");
39 a = (uint16_t *) malloc(200);
40 b = (uint16_t *) malloc(200);
47 for (i = 0; i < 30; i++) a[i] = MOA_Random_W(16, 1);
49 gf.multiply_region.w32(&gf, a, b, 0x1234, 30*2, 0);
51 printf("a: 0x%lx b: 0x%lx\n", (unsigned long) a, (unsigned long) b);
53 for (i = 0; i < 30; i += 10) {
56 for (j = 0; j < 10; j++) printf(" %4d", i+j);
60 for (j = 0; j < 10; j++) printf(" %04x", a[i+j]);
64 for (j = 0; j < 10; j++) printf(" %04x", b[i+j]);
69 for (i = 0; i < 15; i ++) {
70 printf("Word %2d: 0x%04x * 0x1234 = 0x%04x ", i,
71 gf.extract_word.w32(&gf, a, 30*2, i),
72 gf.extract_word.w32(&gf, b, 30*2, i));
73 printf("Word %2d: 0x%04x * 0x1234 = 0x%04x\n", i+15,
74 gf.extract_word.w32(&gf, a, 30*2, i+15),
75 gf.extract_word.w32(&gf, b, 30*2, i+15));