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Diffstat (limited to 'src/cae.c')
| -rw-r--r-- | src/cae.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/cae.c b/src/cae.c new file mode 100644 index 0000000..2711170 --- /dev/null +++ b/src/cae.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2019, The Linux Foundation. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials provided + * with the distribution. + * * Neither the name of The Linux Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE + * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN + * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include "AEEatomic.h" + +#ifdef _WIN32 +#include "Windows.h" +uint32 atomic_CompareAndExchange(uint32 * volatile puDest, uint32 uExchange, uint32 uCompare) { + C_ASSERT(sizeof(LONG) == sizeof(uint32)); + return (uint32)InterlockedCompareExchange((LONG*)puDest, (LONG)uExchange, (LONG)uCompare); +} +uintptr_t atomic_CompareAndExchangeUP(uintptr_t * volatile puDest, uintptr_t uExchange, uintptr_t uCompare) { + C_ASSERT(sizeof(uintptr_t) == sizeof(void*)); + return (uintptr_t)InterlockedCompareExchangePointer((void**)puDest, (void*)uExchange, (void*)uCompare); +} +#elif __hexagon__ + +#ifndef C_ASSERT +#define C_ASSERT(test) \ + switch(0) {\ + case 0:\ + case test:;\ + } +#endif + +static inline unsigned int +qurt_atomic_compare_val_and_set(unsigned int* target, + unsigned int old_val, + unsigned int new_val) +{ + unsigned int current_val; + + __asm__ __volatile__( + "1: %0 = memw_locked(%2)\n" + " p0 = cmp.eq(%0, %3)\n" + " if !p0 jump 2f\n" + " memw_locked(%2, p0) = %4\n" + " if !p0 jump 1b\n" + "2:\n" + : "=&r" (current_val),"+m" (*target) + : "r" (target), "r" (old_val), "r" (new_val) + : "p0"); + + return current_val; +} +uint32 atomic_CompareAndExchange(uint32 * volatile puDest, uint32 uExchange, uint32 uCompare) { + return (uint32)qurt_atomic_compare_val_and_set((unsigned int*)puDest, uCompare, uExchange); +} +uintptr_t atomic_CompareAndExchangeUP(uintptr_t * volatile puDest, uintptr_t uExchange, uintptr_t uCompare) { + C_ASSERT(sizeof(uintptr_t) == sizeof(uint32)); + return (uint32)atomic_CompareAndExchange((uint32*)puDest, (uint32)uExchange, (uint32)uCompare); +} +#elif __GNUC__ +uint32 atomic_CompareAndExchange(uint32 * volatile puDest, uint32 uExchange, uint32 uCompare) { + return __sync_val_compare_and_swap(puDest, uCompare, uExchange); +} +uint64 atomic_CompareAndExchange64(uint64 * volatile puDest, uint64 uExchange, uint64 uCompare) { + return __sync_val_compare_and_swap(puDest, uCompare, uExchange); +} +uintptr_t atomic_CompareAndExchangeUP(uintptr_t * volatile puDest, uintptr_t uExchange, uintptr_t uCompare) { + return __sync_val_compare_and_swap(puDest, uCompare, uExchange); +} +#endif //compare and exchange |