Vectorization Post: 302895149

Sponsored Content

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.

a3mlord

View Public Profile for a3mlord

Find all posts by a3mlord

LEARN ABOUT DEBIAN

vhdlablvector

VHDLABLVECTOR(3)						   ABL FUNCTIONS						  VHDLABLVECTOR(3)

NAME

       vhdlablvector - gives the index and the name of a vectorized name.

ORIGIN

       This  software  belongs	to  the  ALLIANCE CAD SYSTEM developed by the ASIM team at LIP6 laboratory of Universite Pierre et Marie CURIE, in
       Paris, France.

       Web : http://asim.lip6.fr/recherche/alliance/
       E-mail : alliance-users@asim.lip6.fr

SYNOPSYS

       #include "abl101.h"
       char *vhdlablvector( Name, Index )
	 char *Name;
	 long *Index;

PARAMETERS

       Name		   A vectorized name.

       Index		   A pointer to long.

DESCRIPTION

       vhdlablvector searches the index of a vectorized name, and the vector's name.

RETURN VALUE

       If Name is a vectorized name, vhdlablvector returns the vector's name using namealloc, and its index throw Index.  Otherwise, it returns  a
       null pointer.

EXAMPLE

       #include "abl101.h"
	  long Index;
	  char *Name;
	  Name = vhdlablvector( "vec 2", &Index );
	  /* displays Name:vec, Index:2  */
	  printf( "Name:%s, Index:%d0, Name, Index );

SEE ALSO

       abl(1), ablvhdlname(3).

BUG REPORT

       This tool is under development at the ASIM department of the LIP6 laboratory.
       We need your feedback to improve documentation and tools.

ASIM
/LIP6							  October 1, 1997						  VHDLABLVECTOR(3)