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author | Rich Felker <dalias@aerifal.cx> | 2014-02-27 22:03:25 -0500 |
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committer | Rich Felker <dalias@aerifal.cx> | 2014-02-27 22:03:25 -0500 |
commit | aacd348637e38795dd7ae3c7c8c908d8c0cd24fd (patch) | |
tree | 3055797eea08dafe99dcdbd1e7efabd44bcb723b /arch/sh/atomic.h | |
parent | b9f7f2e8762922a1a24d41358164ebe9ae437e31 (diff) | |
download | musl-aacd348637e38795dd7ae3c7c8c908d8c0cd24fd.tar.gz musl-aacd348637e38795dd7ae3c7c8c908d8c0cd24fd.tar.bz2 musl-aacd348637e38795dd7ae3c7c8c908d8c0cd24fd.tar.xz musl-aacd348637e38795dd7ae3c7c8c908d8c0cd24fd.zip |
rename superh port to "sh" for consistency
linux, gcc, etc. all use "sh" as the name for the superh arch. there
was already some inconsistency internally in musl: the dynamic linker
was searching for "ld-musl-sh.path" as its path file despite its own
name being "ld-musl-superh.so.1". there was some sentiment in both
directions as to how to resolve the inconsistency, but overall "sh"
was favored.
Diffstat (limited to 'arch/sh/atomic.h')
-rw-r--r-- | arch/sh/atomic.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/arch/sh/atomic.h b/arch/sh/atomic.h new file mode 100644 index 00000000..104a4f12 --- /dev/null +++ b/arch/sh/atomic.h @@ -0,0 +1,87 @@ +#ifndef _INTERNAL_ATOMIC_H +#define _INTERNAL_ATOMIC_H + +#include <stdint.h> + +static inline int a_ctz_l(unsigned long x) +{ + static const char debruijn32[32] = { + 0, 1, 23, 2, 29, 24, 19, 3, 30, 27, 25, 11, 20, 8, 4, 13, + 31, 22, 28, 18, 26, 10, 7, 12, 21, 17, 9, 6, 16, 5, 15, 14 + }; + return debruijn32[(x&-x)*0x076be629 >> 27]; +} + +static inline int a_ctz_64(uint64_t x) +{ + uint32_t y = x; + if (!y) { + y = x>>32; + return 32 + a_ctz_l(y); + } + return a_ctz_l(y); +} + +int __sh_cas(volatile int *, int, int); +int __sh_swap(volatile int *, int); +int __sh_fetch_add(volatile int *, int); +void __sh_store(volatile int *, int); +void __sh_and(volatile int *, int); +void __sh_or(volatile int *, int); + +#define a_cas(p,t,s) __sh_cas(p,t,s) +#define a_swap(x,v) __sh_swap(x,v) +#define a_fetch_add(x,v) __sh_fetch_add(x, v) +#define a_store(x,v) __sh_store(x, v) +#define a_and(x,v) __sh_and(x, v) +#define a_or(x,v) __sh_or(x, v) + +static inline void *a_cas_p(volatile void *p, void *t, void *s) +{ + return (void *)a_cas(p, (int)t, (int)s); +} + +static inline long a_cas_l(volatile void *p, long t, long s) +{ + return a_cas(p, t, s); +} + +static inline void a_inc(volatile int *x) +{ + a_fetch_add(x, 1); +} + +static inline void a_dec(volatile int *x) +{ + a_fetch_add(x, -1); +} + +static inline void a_spin() +{ +} + +static inline void a_crash() +{ + *(volatile char *)0=0; +} + +static inline void a_or_l(volatile void *p, long v) +{ + a_or(p, v); +} + +static inline void a_and_64(volatile uint64_t *p, uint64_t v) +{ + union { uint64_t v; uint32_t r[2]; } u = { v }; + a_and((int *)p, u.r[0]); + a_and((int *)p+1, u.r[1]); +} + +static inline void a_or_64(volatile uint64_t *p, uint64_t v) +{ + union { uint64_t v; uint32_t r[2]; } u = { v }; + a_or((int *)p, u.r[0]); + a_or((int *)p+1, u.r[1]); +} + +#endif |