Vectorization Post: 302895149

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Special Forums UNIX and Linux Applications High Performance Computing Vectorization Post 302895149 by a3mlord on Friday 28th of March 2014 05:03:17 PM

03-28-2014

Registered User

Vectorization

Hi,

I have the following vectorized code:

Code:

long valor = 0, i=0;

 __m128i vsum, vecPi, vecCi, vecQCi;

 vsum = _mm_set1_epi32(0);

 int32_t * const pA = A->data;
 int32_t * const pB = B->data;

 int sumDot[1];

 for( ; i<SIZE-3 ;i+=4){

 vecPi = _mm_loadu_si128((__m128i *)&(pA)[i] );
 vecCi = _mm_loadu_si128((__m128i *)&(pB)[i] );
 vecQCi = _mm_mullo_epi32(vecPi,vecCi);
 vsum = _mm_add_epi32(vsum,vecQCi);

 } 
 vsum = _mm_hadd_epi32(vsum, vsum);
 vsum = _mm_hadd_epi32(vsum, vsum);
 _mm_storeu_si128((__m128i *)&(sumDot), vsum);

 for( ; i<SIZE; i++)
 valor += A->data[i] * B->data[i];   valor += sumDot[0];

However, as I get overflows, I need to handle those cases. Could you please help me with that?

Thanks

Last edited by bartus11; 03-28-2014 at 06:06 PM.. Reason: Please use [code][/code] tags.

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soconvexdatacache

SoConvexDataCache(3)						       Coin						      SoConvexDataCache(3)

NAME

       SoConvexDataCache -

       The SoConvexDataCache class is used to cache convexified polygons.

       SoConvexDataCache is used to speed up rendering of concave polygons by tessellating all polygons into triangles and storing the newly
       generated primitives in an internal cache.

SYNOPSIS

       #include <Inventor/caches/SoConvexDataCache.h>

       Inherits SoCache.

   Public Types
       enum Binding { NONE =  0, PER_FACE, PER_FACE_INDEXED, PER_VERTEX, PER_VERTEX_INDEXED }
	   The Binding enum is used to specify bindings.

   Public Member Functions
       SoConvexDataCache (SoState *const state)
       virtual ~SoConvexDataCache ()
       void generate (const SoCoordinateElement *const coords, const SbMatrix &matrix, const int32_t *coordindices, const int numcoordindices,
	   const int32_t *matindices, const int32_t *normindices, const int32_t *texindices, const Binding matbinding, const Binding normbinding,
	   const Binding texbinding)
       const int32_t * getCoordIndices (void) const
       int getNumCoordIndices (void) const
       const int32_t * getMaterialIndices (void) const
       int getNumMaterialIndices (void) const
       const int32_t * getNormalIndices (void) const
       int getNumNormalIndices (void) const
       const int32_t * getTexIndices (void) const
       int getNumTexIndices (void) const

   Additional Inherited Members
Detailed Description
       The SoConvexDataCache class is used to cache convexified polygons.

       SoConvexDataCache is used to speed up rendering of concave polygons by tessellating all polygons into triangles and storing the newly
       generated primitives in an internal cache.

       This class is not part of the original SGI Open Inventor v2.1 API, but is a Coin extension.

Member Enumeration Documentation
   enum SoConvexDataCache::Binding
       The Binding enum is used to specify bindings. Binding applies to normals, materials and texture coordinates.

Constructor &; Destructor Documentation
   SoConvexDataCache::SoConvexDataCache (SoState *conststate)
       Constructor with state being the current state.

   SoConvexDataCache::~SoConvexDataCache () [virtual]
       Destructor.

Member Function Documentation
   void SoConvexDataCache::generate (const SoCoordinateElement *constcoords, const SbMatrix &matrix, const int32_t *vind, const intnumv, const
       int32_t *mind, const int32_t *nind, const int32_t *tind, const Bindingmatbind, const Bindingnormbind, const Bindingtexbind)
       Generates the convexified data. FIXME: doc

   const int32_t * SoConvexDataCache::getCoordIndices (void) const
       Returns a pointer to the convexified coordinate indices.

       See also:
	   SoConvexDataCache::getNumCoordIndices()

   int SoConvexDataCache::getNumCoordIndices (void) const
       Returns the number of coordinate indices.

       See also:
	   SoConvexDataCache::getCoordIndices()

   const int32_t * SoConvexDataCache::getMaterialIndices (void) const
       Returns the convexified material indices.

       See also:
	   SoConvexDataCache::getNumMaterialIndices()

   int SoConvexDataCache::getNumMaterialIndices (void) const
       Returns the number of material indices.

       See also:
	   SoConvexDataCache::getMaterialIndices()

   const int32_t * SoConvexDataCache::getNormalIndices (void) const
       Returns the convexified normal indices.

       See also:
	   SoConvexDataCache::getNumNormalIndices()

   int SoConvexDataCache::getNumNormalIndices (void) const
       Returns the number of normal indices.

       See also:
	   SoConvexDataCache::getNormalIndices()

   const int32_t * SoConvexDataCache::getTexIndices (void) const
       Returns the convexified texture coordinate indices.

       See also:
	   SoConvexDataCache::getNumTexIndices()

   int SoConvexDataCache::getNumTexIndices (void) const
       Returns the number of texture coordinate indices.

       See also:
	   SoConvexDataCache::getTexIndices()

Author
       Generated automatically by Doxygen for Coin from the source code.

Version 3.1.3							  Wed May 23 2012					      SoConvexDataCache(3)