Root/
| 1 | /*␊ |
| 2 | * libgcc/__clzsi2.c␊ |
| 3 | *␊ |
| 4 | * Returns the leading number of 0 bits in the argument␊ |
| 5 | */␊ |
| 6 | ␊ |
| 7 | #include <stdint.h>␊ |
| 8 | #include <stddef.h>␊ |
| 9 | ␊ |
| 10 | uint32_t __clzsi2(uint32_t v)␊ |
| 11 | {␊ |
| 12 | ␉int p = 31;␊ |
| 13 | ␊ |
| 14 | ␉if (v & 0xffff0000) {␊ |
| 15 | ␉␉p -= 16;␊ |
| 16 | ␉␉v >>= 16;␊ |
| 17 | ␉}␊ |
| 18 | ␉if (v & 0xff00) {␊ |
| 19 | ␉␉p -= 8;␊ |
| 20 | ␉␉v >>= 8;␊ |
| 21 | ␉}␊ |
| 22 | ␉if (v & 0xf0) {␊ |
| 23 | ␉␉p -= 4;␊ |
| 24 | ␉␉v >>= 4;␊ |
| 25 | ␉}␊ |
| 26 | ␉if (v & 0xc) {␊ |
| 27 | ␉␉p -= 2;␊ |
| 28 | ␉␉v >>= 2;␊ |
| 29 | ␉}␊ |
| 30 | ␉if (v & 0x2) {␊ |
| 31 | ␉␉p -= 1;␊ |
| 32 | ␉␉v >>= 1;␊ |
| 33 | ␉}␊ |
| 34 | ␊ |
| 35 | ␉return p;␊ |
| 36 | }␊ |
| 37 |
