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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shishi_authenticator_add_authorizationdata

shishi_authenticator_add_authorizationdata(3)			      shishi			     shishi_authenticator_add_authorizationdata(3)

NAME

       shishi_authenticator_add_authorizationdata - API function

SYNOPSIS

       #include <shishi.h>

       int  shishi_authenticator_add_authorizationdata(Shishi  *  handle,  Shishi_asn1	authenticator, int32_t adtype, const char * addata, size_t
       addatalen);

ARGUMENTS

       Shishi * handle
		   shishi handle as allocated by shishi_init().

       Shishi_asn1 authenticator
		   authenticator as allocated by shishi_authenticator().

       int32_t adtype
		   input authorization data type to add.

       const char * addata
		   input authorization data to add.

       size_t addatalen
		   size of input authorization data to add.

DESCRIPTION

       Add authorization data to authenticator.

RETURN VALUE

       Returns SHISHI_OK iff successful.

REPORTING BUGS

       Report bugs to <bug-shishi@gnu.org>.

COPYRIGHT

       Copyright (C) 2002-2010 Simon Josefsson.
       Copying and distribution of this file, with or without modification, are permitted in any medium without  royalty  provided  the  copyright
       notice and this notice are preserved.

SEE ALSO

       The  full documentation for shishi is maintained as a Texinfo manual.  If the info and shishi programs are properly installed at your site,
       the command

	      info shishi

       should give you access to the complete manual.

shishi								       1.0.1			     shishi_authenticator_add_authorizationdata(3)