diff options
Diffstat (limited to 'libc-top-half/musl/arch/microblaze/atomic_arch.h')
-rw-r--r-- | libc-top-half/musl/arch/microblaze/atomic_arch.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libc-top-half/musl/arch/microblaze/atomic_arch.h b/libc-top-half/musl/arch/microblaze/atomic_arch.h new file mode 100644 index 0000000..1152e8c --- /dev/null +++ b/libc-top-half/musl/arch/microblaze/atomic_arch.h @@ -0,0 +1,53 @@ +#define a_cas a_cas +static inline int a_cas(volatile int *p, int t, int s) +{ + register int old, tmp; + __asm__ __volatile__ ( + " addi %0, r0, 0\n" + "1: lwx %0, %2, r0\n" + " rsubk %1, %0, %3\n" + " bnei %1, 1f\n" + " swx %4, %2, r0\n" + " addic %1, r0, 0\n" + " bnei %1, 1b\n" + "1: " + : "=&r"(old), "=&r"(tmp) + : "r"(p), "r"(t), "r"(s) + : "cc", "memory" ); + return old; +} + +#define a_swap a_swap +static inline int a_swap(volatile int *x, int v) +{ + register int old, tmp; + __asm__ __volatile__ ( + " addi %0, r0, 0\n" + "1: lwx %0, %2, r0\n" + " swx %3, %2, r0\n" + " addic %1, r0, 0\n" + " bnei %1, 1b\n" + "1: " + : "=&r"(old), "=&r"(tmp) + : "r"(x), "r"(v) + : "cc", "memory" ); + return old; +} + +#define a_fetch_add a_fetch_add +static inline int a_fetch_add(volatile int *x, int v) +{ + register int new, tmp; + __asm__ __volatile__ ( + " addi %0, r0, 0\n" + "1: lwx %0, %2, r0\n" + " addk %0, %0, %3\n" + " swx %0, %2, r0\n" + " addic %1, r0, 0\n" + " bnei %1, 1b\n" + "1: " + : "=&r"(new), "=&r"(tmp) + : "r"(x), "r"(v) + : "cc", "memory" ); + return new-v; +} |