int main(uint64_t ea, uint64_t outptr, uint64_t arg3, uint64_t arg4)
{
/* memory-aligned buffer (vectors always are properly aligned) */
volatile vec_uchar16 v;
/* fetch the 16 bytes using dma */
mfc_get(&v, ea, 16, TAG, 0, 0);
wait_for_completion();
/* compare all characters with the small 'a' character code */
vec_uchar16 cmp = spu_cmpgt(v, spu_splats((unsigned char)('a'-1)));
/* for all small characters, we remove 0x20 to get the corresponding capital*/
vec_uchar16 sub = spu_splats((unsigned char)0x20) & cmp;
/* convert all small characters to capitals */
v = v - sub;
/* send the updated vector to ppe */
mfc_put(&v, ea, 16, TAG, 0, 0);
wait_for_completion();
/* send a message to inform the ppe program that the work is done */
uint32_t ok __attribute__((aligned(16))) = 1;
mfc_put(&ok, outptr, 4, TAG, 0, 0);
wait_for_completion();
/* properly exit the thread */
spu_thread_exit(0);
return 0;
}
int main(uint64_t sync_ea, uint64_t response_ea, uint64_t arg3, uint64_t arg4) {
/* get input value from ppu via signal notification register 1 (blocking read) */
uint32_t x = spu_read_signal1();
/* return the value multiplied by 3 to response variable with sync via dma */
send_response(sync_ea, response_ea, x*3);
wait_for_completion();
/* properly exit the thread */
spu_thread_exit(0);
return 0;
}
int main(uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4) {
/* get data structure */
spu_ea = arg1;
mfc_get(&spu, spu_ea, sizeof(spustr_t), TAG, 0, 0);
wait_for_completion(TAG);
/* main loop: wait for screen address or 0 to end */
uint32_t buffer_ea;
while ((buffer_ea = spu_read_signal1()) != 0) {
mfc_get(&spu, spu_ea, sizeof(spustr_t), TAG, 0, 0);
wait_for_completion(TAG);
draw_frame(buffer_ea);
send_response(1);
wait_for_completion(TAG);
}
/* properly exit the thread */
spu_thread_exit(0);
return 0;
}