| #ifndef ARCH_AARCH64_H |
| #define ARCH_AARCH64_H |
| |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| |
| #define FIO_ARCH (arch_aarch64) |
| |
| #ifndef __NR_ioprio_set |
| #define __NR_ioprio_set 30 |
| #define __NR_ioprio_get 31 |
| #endif |
| |
| #define nop do { __asm__ __volatile__ ("yield"); } while (0) |
| #define read_barrier() do { __sync_synchronize(); } while (0) |
| #define write_barrier() do { __sync_synchronize(); } while (0) |
| |
| static inline int arch_ffz(unsigned long bitmask) |
| { |
| unsigned long count, reversed_bits; |
| if (~bitmask == 0) /* ffz() in lib/ffz.h does this. */ |
| return 63; |
| |
| __asm__ __volatile__ ("rbit %1, %2\n" |
| "clz %0, %1\n" : |
| "=r"(count), "=&r"(reversed_bits) : |
| "r"(~bitmask)); |
| return count; |
| } |
| |
| #define ARCH_HAVE_FFZ |
| |
| #endif |