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fix bug #267: alloca is not aligned on arm

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This commit is contained in:
Gael Guennebaud 2011-05-17 21:30:12 +02:00
parent d4fd298fbb
commit 179d42bb2b
1 changed files with 7 additions and 1 deletions
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8
Eigen/src/Core/util/Memory.h
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@ -529,10 +529,16 @@ template<typename T> class aligned_stack_memory_handler
*/
#ifdef EIGEN_ALLOCA
#ifdef __arm__
#define EIGEN_ALIGNED_ALLOCA(SIZE) reinterpret_cast<void*>((reinterpret_cast<size_t>(EIGEN_ALLOCA(SIZE+16)) & ~(size_t(15))) + 16)
#else
#define EIGEN_ALIGNED_ALLOCA EIGEN_ALLOCA
#endif
#define ei_declare_aligned_stack_constructed_variable(TYPE,NAME,SIZE,BUFFER) \
TYPE* NAME = (BUFFER)!=0 ? (BUFFER) \
: reinterpret_cast<TYPE*>( \
(sizeof(TYPE)*SIZE<=EIGEN_STACK_ALLOCATION_LIMIT) ? EIGEN_ALLOCA(sizeof(TYPE)*SIZE) \
(sizeof(TYPE)*SIZE<=EIGEN_STACK_ALLOCATION_LIMIT) ? EIGEN_ALIGNED_ALLOCA(sizeof(TYPE)*SIZE) \
: Eigen::internal::aligned_malloc(sizeof(TYPE)*SIZE) ); \
Eigen::internal::aligned_stack_memory_handler<TYPE> EIGEN_CAT(NAME,_stack_memory_destructor)((BUFFER)==0 ? NAME : 0,SIZE,sizeof(TYPE)*SIZE>EIGEN_STACK_ALLOCATION_LIMIT)