diff options
| -rw-r--r-- | include/afl-fuzz.h | 4 | ||||
| -rw-r--r-- | src/afl-fuzz-bitmap.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/include/afl-fuzz.h b/include/afl-fuzz.h index 6d03a74c..45600698 100644 --- a/include/afl-fuzz.h +++ b/include/afl-fuzz.h @@ -116,6 +116,10 @@ #include <TargetConditionals.h> #endif +#ifndef __has_builtin + #define __has_builtin(x) 0 +#endif + #undef LIST_FOREACH /* clashes with FreeBSD */ #include "list.h" #ifndef SIMPLE_FILES diff --git a/src/afl-fuzz-bitmap.c b/src/afl-fuzz-bitmap.c index 03bc5d6c..405d2dd6 100644 --- a/src/afl-fuzz-bitmap.c +++ b/src/afl-fuzz-bitmap.c @@ -75,9 +75,13 @@ u32 count_bits(afl_state_t *afl, u8 *mem) { } +#if __has_builtin(__builtin_popcount) + ret += __builtin_popcount(v); +#else v -= ((v >> 1) & 0x55555555); v = (v & 0x33333333) + ((v >> 2) & 0x33333333); ret += (((v + (v >> 4)) & 0xF0F0F0F) * 0x01010101) >> 24; +#endif } |