@@ -24,7 +24,9 @@
/** @file parallel/compatibility.h
* @brief Compatibility layer, mostly concerned with atomic operations.
- * This file is a GNU parallel extension to the Standard C++ Library.
+ *
+ * This file is a GNU parallel extension to the Standard C++ Library
+ * and contains implementation details for the library's internal use.
*/
// Written by Felix Putze.
@@ -35,21 +37,10 @@
#include <parallel/types.h>
#include <parallel/base.h>
-#if defined(__SUNPRO_CC) && defined(__sparc)
-#include <sys/atomic.h>
-#endif
-
#if !defined(_WIN32) || defined (__CYGWIN__)
#include <sched.h>
#endif
-#if defined(_MSC_VER)
-#include <Windows.h>
-#include <intrin.h>
-#undef max
-#undef min
-#endif
-
#ifdef __MINGW32__
// Including <windows.h> will drag in all the windows32 names. Since
// that can cause user code portability problems, we just declare the
@@ -60,30 +51,7 @@ __attribute((dllimport)) void __attribute__((stdcall)) Sleep (unsigned long);
namespace __gnu_parallel
{
-#if defined(__ICC)
- template<typename _MustBeInt = int>
- int32_t __faa32(int32_t* __x, int32_t __inc)
- {
- asm volatile("lock xadd %0,%1"
- : "=__r" (__inc), "=__m" (*__x)
- : "0" (__inc)
- : "memory");
- return __inc;
- }
-#if defined(__x86_64)
- template<typename _MustBeInt = int>
- int64_t __faa64(int64_t* __x, int64_t __inc)
- {
- asm volatile("lock xadd %0,%1"
- : "=__r" (__inc), "=__m" (*__x)
- : "0" (__inc)
- : "memory");
- return __inc;
- }
-#endif
-#endif
-
- // atomic functions only work on integers
+ // These atomic functions only work on integers
/** @brief Add a value to a variable, atomically.
*
@@ -94,34 +62,7 @@ namespace __gnu_parallel
inline int32_t
__fetch_and_add_32(volatile int32_t* __ptr, int32_t __addend)
{
-#if defined(__ICC) //x86 version
- return _InterlockedExchangeAdd((void*)__ptr, __addend);
-#elif defined(__ECC) //IA-64 version
- return _InterlockedExchangeAdd((void*)__ptr, __addend);
-#elif defined(__ICL) || defined(_MSC_VER)
- return _InterlockedExchangeAdd(reinterpret_cast<volatile long*>(__ptr),
- __addend);
-#elif defined(__GNUC__)
return __atomic_fetch_add(__ptr, __addend, __ATOMIC_ACQ_REL);
-#elif defined(__SUNPRO_CC) && defined(__sparc)
- volatile int32_t __before, __after;
- do
- {
- __before = *__ptr;
- __after = __before + __addend;
- } while (atomic_cas_32((volatile unsigned int*)__ptr, __before,
- __after) != __before);
- return __before;
-#else //fallback, slow
-#pragma message("slow __fetch_and_add_32")
- int32_t __res;
-#pragma omp critical
- {
- __res = *__ptr;
- *(__ptr) += __addend;
- }
- return __res;
-#endif
}
/** @brief Add a value to a variable, atomically.
@@ -133,34 +74,14 @@ namespace __gnu_parallel
inline int64_t
__fetch_and_add_64(volatile int64_t* __ptr, int64_t __addend)
{
-#if defined(__ICC) && defined(__x86_64) //x86 version
- return __faa64<int>((int64_t*)__ptr, __addend);
-#elif defined(__ECC) //IA-64 version
- return _InterlockedExchangeAdd64((void*)__ptr, __addend);
-#elif defined(__ICL) || defined(_MSC_VER)
-#ifndef _WIN64
- _GLIBCXX_PARALLEL_ASSERT(false); //not available in this case
- return 0;
-#else
- return _InterlockedExchangeAdd64(__ptr, __addend);
-#endif
-#elif defined(__GNUC__) && defined(__x86_64)
+#if defined(__x86_64)
return __atomic_fetch_add(__ptr, __addend, __ATOMIC_ACQ_REL);
-#elif defined(__GNUC__) && defined(__i386) && \
+#elif defined(__i386) && \
(defined(__i686) || defined(__pentium4) || defined(__athlon) \
|| defined(__k8) || defined(__core2))
return __atomic_fetch_add(__ptr, __addend, __ATOMIC_ACQ_REL);
-#elif defined(__SUNPRO_CC) && defined(__sparc)
- volatile int64_t __before, __after;
- do
- {
- __before = *__ptr;
- __after = __before + __addend;
- } while (atomic_cas_64((volatile unsigned long long*)__ptr, __before,
- __after) != __before);
- return __before;
#else //fallback, slow
-#if defined(__GNUC__) && defined(__i386)
+#if defined(__i386)
// XXX doesn'__t work with -march=native
//#warning "please compile with -march=i686 or better"
#endif
@@ -195,39 +116,6 @@ namespace __gnu_parallel
_GLIBCXX_PARALLEL_ASSERT(false);
}
-
-#if defined(__ICC)
-
- template<typename _MustBeInt = int>
- inline int32_t
- __cas32(volatile int32_t* __ptr, int32_t __old, int32_t __nw)
- {
- int32_t __before;
- __asm__ __volatile__("lock; cmpxchgl %1,%2"
- : "=a"(__before)
- : "q"(__nw), "__m"(*(volatile long long*)(__ptr)),
- "0"(__old)
- : "memory");
- return __before;
- }
-
-#if defined(__x86_64)
- template<typename _MustBeInt = int>
- inline int64_t
- __cas64(volatile int64_t *__ptr, int64_t __old, int64_t __nw)
- {
- int64_t __before;
- __asm__ __volatile__("lock; cmpxchgq %1,%2"
- : "=a"(__before)
- : "q"(__nw), "__m"(*(volatile long long*)(__ptr)),
- "0"(__old)
- : "memory");
- return __before;
- }
-#endif
-
-#endif
-
/** @brief Compare @c *__ptr and @c __comparand. If equal, let @c
* *__ptr=__replacement and return @c true, return @c false otherwise.
*
@@ -240,37 +128,9 @@ namespace __gnu_parallel
__compare_and_swap_32(volatile int32_t* __ptr, int32_t __comparand,
int32_t __replacement)
{
-#if defined(__ICC) //x86 version
- return _InterlockedCompareExchange((void*)__ptr, __replacement,
- __comparand) == __comparand;
-#elif defined(__ECC) //IA-64 version
- return _InterlockedCompareExchange((void*)__ptr, __replacement,
- __comparand) == __comparand;
-#elif defined(__ICL) || defined(_MSC_VER)
- return _InterlockedCompareExchange(
- reinterpret_cast<volatile long*>(__ptr),
- __replacement, __comparand)
- == __comparand;
-#elif defined(__GNUC__)
return __atomic_compare_exchange_n(__ptr, &__comparand, __replacement,
false, __ATOMIC_ACQ_REL,
__ATOMIC_RELAXED);
-#elif defined(__SUNPRO_CC) && defined(__sparc)
- return atomic_cas_32((volatile unsigned int*)__ptr, __comparand,
- __replacement) == __comparand;
-#else
-#pragma message("slow __compare_and_swap_32")
- bool __res = false;
-#pragma omp critical
- {
- if (*__ptr == __comparand)
- {
- *__ptr = __replacement;
- __res = true;
- }
- }
- return __res;
-#endif
}
/** @brief Compare @c *__ptr and @c __comparand. If equal, let @c
@@ -285,35 +145,18 @@ namespace __gnu_parallel
__compare_and_swap_64(volatile int64_t* __ptr, int64_t __comparand,
int64_t __replacement)
{
-#if defined(__ICC) && defined(__x86_64) //x86 version
- return __cas64<int>(__ptr, __comparand, __replacement) == __comparand;
-#elif defined(__ECC) //IA-64 version
- return _InterlockedCompareExchange64((void*)__ptr, __replacement,
- __comparand) == __comparand;
-#elif defined(__ICL) || defined(_MSC_VER)
-#ifndef _WIN64
- _GLIBCXX_PARALLEL_ASSERT(false); //not available in this case
- return 0;
-#else
- return _InterlockedCompareExchange64(__ptr, __replacement,
- __comparand) == __comparand;
-#endif
-
-#elif defined(__GNUC__) && defined(__x86_64)
+#if defined(__x86_64)
return __atomic_compare_exchange_n(__ptr, &__comparand, __replacement,
false, __ATOMIC_ACQ_REL,
__ATOMIC_RELAXED);
-#elif defined(__GNUC__) && defined(__i386) && \
+#elif defined(__i386) && \
(defined(__i686) || defined(__pentium4) || defined(__athlon) \
|| defined(__k8) || defined(__core2))
return __atomic_compare_exchange_n(__ptr, &__comparand, __replacement,
false, __ATOMIC_ACQ_REL,
__ATOMIC_RELAXED);
-#elif defined(__SUNPRO_CC) && defined(__sparc)
- return atomic_cas_64((volatile unsigned long long*)__ptr,
- __comparand, __replacement) == __comparand;
#else
-#if defined(__GNUC__) && defined(__i386)
+#if defined(__i386)
// XXX -march=native
//#warning "please compile with -march=i686 or better"
#endif
@@ -337,7 +180,8 @@ namespace __gnu_parallel
* Implementation is heavily platform-dependent.
* @param __ptr Pointer to signed integer.
* @param __comparand Compare value.
- * @param __replacement Replacement value. */
+ * @param __replacement Replacement value.
+ */
template<typename _Tp>
inline bool
__compare_and_swap(volatile _Tp* __ptr, _Tp __comparand, _Tp __replacement)
@@ -355,7 +199,8 @@ namespace __gnu_parallel
}
/** @brief Yield the control to another thread, without waiting for
- the end to the time slice. */
+ * the end of the time slice.
+ */
inline void
__yield()
{
This removes all the code for non-GCC compilers in <parallel/compatibility.h> Tested x86_64, "make check check-parallel", committed to trunk. PR libstdc++/34106 * include/parallel/compatibility.h: Remove non-GCC code. commit 9c3f1fdec9fc7be67cf2c0d45d1b791f167c0aec Author: Jonathan Wakely <jwakely.gcc@gmail.com> Date: Thu Sep 27 19:10:07 2012 +0100 PR libstdc++/34106 * include/parallel/compatibility.h: Remove non-GCC code.