* XXX - how do we know gcc isn't optimising this? it seems to optimise after
* parsing C -> asm, but before asm -> machine code.
*/
- asm volatile ("pshx\npsha\npshb\n"); /* save registers */
+ //asm volatile ("pshx\npsha\npshb\n"); /* save registers */
asm volatile ("ldx %0\n" :: "m" (ms));
asm volatile (
- "loop:\n"
- " dex\n" /* 3 */
- " beq out\n" /* 3 */
- " ldd #327\n" /* 3 */
- "inner_loop:\n" /* 15 cycles each */
- " cpd #0x0000\n" /* 5 */
- " beq inner_loop_end\n" /* 3 */
- " subd #0x0001\n" /* 4 */
- " bra inner_loop\n" /* 3 */
- "inner_loop_end:\n"
- " bra loop\n" /* 3 */
- "out:\n"
- " pulb\n"
+ "delay_loop:\n"
+ " dex\n" /* 3 */
+ " beq delay_out\n" /* 3 */
+ " ldd #327\n" /* 3 */
+ "delay_inner_loop:\n" /* 15 cycles each */
+ " cpd #0x0000\n" /* 5 */
+ " beq delay_inner_loop_end\n" /* 3 */
+ " subd #0x0001\n" /* 4 */
+ " bra delay_inner_loop\n" /* 3 */
+ "delay_inner_loop_end:\n"
+ " bra delay_loop\n" /* 3 */
+ "delay_out:\n");
+ /*" pulb\n"
" pula\n"
- " pulx\n");
+ " pulx\n");*/
}
void my_strncpy(char* dst, char* src, u8 max_size) {