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| (Empty) |
| 1 __attribute__((__visibility__( | |
| 2 "hidden"))) extern const void* __arm_atomics[3]; /* gettp, cas, barrier */ | |
| 3 | |
| 4 #if ((__ARM_ARCH_6__ || __ARM_ARCH_6K__ || __ARM_ARCH_6ZK__) && !__thumb__) || \ | |
| 5 __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7 | |
| 6 | |
| 7 #define a_ll a_ll | |
| 8 static inline int a_ll(volatile int* p) { | |
| 9 int v; | |
| 10 __asm__ __volatile__("ldrex %0, %1" : "=r"(v) : "Q"(*p)); | |
| 11 return v; | |
| 12 } | |
| 13 | |
| 14 #define a_sc a_sc | |
| 15 static inline int a_sc(volatile int* p, int v) { | |
| 16 int r; | |
| 17 __asm__ __volatile__("strex %0,%2,%1" | |
| 18 : "=&r"(r), "=Q"(*p) | |
| 19 : "r"(v) | |
| 20 : "memory"); | |
| 21 return !r; | |
| 22 } | |
| 23 | |
| 24 #if __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7 | |
| 25 | |
| 26 #define a_barrier a_barrier | |
| 27 static inline void a_barrier() { | |
| 28 __asm__ __volatile__("dmb ish" : : : "memory"); | |
| 29 } | |
| 30 | |
| 31 #endif | |
| 32 | |
| 33 #define a_pre_llsc a_barrier | |
| 34 #define a_post_llsc a_barrier | |
| 35 | |
| 36 #else | |
| 37 | |
| 38 #define a_cas a_cas | |
| 39 static inline int a_cas(volatile int* p, int t, int s) { | |
| 40 for (;;) { | |
| 41 register int r0 __asm__("r0") = t; | |
| 42 register int r1 __asm__("r1") = s; | |
| 43 register volatile int* r2 __asm__("r2") = p; | |
| 44 int old; | |
| 45 __asm__ __volatile__("bl __a_cas" | |
| 46 : "+r"(r0) | |
| 47 : "r"(r1), "r"(r2) | |
| 48 : "memory", "r3", "lr", "ip", "cc"); | |
| 49 if (!r0) | |
| 50 return t; | |
| 51 if ((old = *p) != t) | |
| 52 return old; | |
| 53 } | |
| 54 } | |
| 55 | |
| 56 #endif | |
| 57 | |
| 58 #ifndef a_barrier | |
| 59 #define a_barrier a_barrier | |
| 60 static inline void a_barrier() { | |
| 61 __asm__ __volatile__("bl __a_barrier" : : : "memory", "cc", "ip", "lr"); | |
| 62 } | |
| 63 #endif | |
| 64 | |
| 65 #define a_crash a_crash | |
| 66 static inline void a_crash() { | |
| 67 __asm__ __volatile__( | |
| 68 #ifndef __thumb__ | |
| 69 ".word 0xe7f000f0" | |
| 70 #else | |
| 71 ".short 0xdeff" | |
| 72 #endif | |
| 73 : | |
| 74 : | |
| 75 : "memory"); | |
| 76 } | |
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Chromium Code Reviews
Issue 1724903002:
[fusl] Remove code for unsupported architectures (Closed)
Base URL: git@github.com:domokit/mojo.git@master