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better optimzations for sgemv_t kernel

This commit is contained in:
wernsaar 2014-09-06 21:28:57 +02:00
parent c8eaf3ae2d
commit 5ae1731fe6
1 changed files with 99 additions and 14 deletions
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113
kernel/x86_64/sgemv_t_4.c
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@ -446,12 +446,45 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
} }
else else
{ {
for ( j=0; j<n; j++ )
if ( inc_y == 1 )
{ {
*y_ptr += *aj * xtemp0 + *(aj+1) * xtemp1 + *(aj+2) * xtemp2;
y_ptr += inc_y; BLASLONG register lda2 = lda << 1;
aj += lda; BLASLONG register lda4 = lda << 2;
BLASLONG register lda3 = lda2 + lda;
for ( j=0; j< ( n & -4 ); j+=4 )
{
y_ptr[j] += *aj * xtemp0 + *(aj+1) * xtemp1 + *(aj+2) * xtemp2;
y_ptr[j+1] += *(aj+lda) * xtemp0 + *(aj+lda+1) * xtemp1 + *(aj+lda+2) * xtemp2;
y_ptr[j+2] += *(aj+lda2) * xtemp0 + *(aj+lda2+1) * xtemp1 + *(aj+lda2+2) * xtemp2;
y_ptr[j+3] += *(aj+lda3) * xtemp0 + *(aj+lda3+1) * xtemp1 + *(aj+lda3+2) * xtemp2;
aj += lda4;
}
for ( ; j< n ; j++ )
{
y_ptr[j] += *aj * xtemp0 + *(aj+1) * xtemp1 + *(aj+2) * xtemp2 ;
aj += lda;
}
} }
else
{
for ( j=0; j<n; j++ )
{
*y_ptr += *aj * xtemp0 + *(aj+1) * xtemp1 + *(aj+2) * xtemp2;
y_ptr += inc_y;
aj += lda;
}
}
} }
return(0); return(0);
} }
@ -487,14 +520,40 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
} }
else else
{ {
if ( inc_y == 1 )
for ( j=0; j<n; j++ )
{ {
*y_ptr += *aj * xtemp0 + *(aj+1) * xtemp1 ;
y_ptr += inc_y;
aj += lda;
}
BLASLONG register lda2 = lda << 1;
BLASLONG register lda4 = lda << 2;
BLASLONG register lda3 = lda2 + lda;
for ( j=0; j< ( n & -4 ); j+=4 )
{
y_ptr[j] += *aj * xtemp0 + *(aj+1) * xtemp1 ;
y_ptr[j+1] += *(aj+lda) * xtemp0 + *(aj+lda+1) * xtemp1 ;
y_ptr[j+2] += *(aj+lda2) * xtemp0 + *(aj+lda2+1) * xtemp1 ;
y_ptr[j+3] += *(aj+lda3) * xtemp0 + *(aj+lda3+1) * xtemp1 ;
aj += lda4;
}
for ( ; j< n ; j++ )
{
y_ptr[j] += *aj * xtemp0 + *(aj+1) * xtemp1 ;
aj += lda;
}
}
else
{
for ( j=0; j<n; j++ )
{
*y_ptr += *aj * xtemp0 + *(aj+1) * xtemp1 ;
y_ptr += inc_y;
aj += lda;
}
}
} }
return(0); return(0);
@ -523,11 +582,37 @@ int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLO
} }
else else
{ {
for ( j=0; j<n; j++ ) if ( inc_y == 1 )
{ {
*y_ptr += *aj * xtemp;
y_ptr += inc_y; BLASLONG register lda2 = lda << 1;
aj += lda; BLASLONG register lda4 = lda << 2;
BLASLONG register lda3 = lda2 + lda;
for ( j=0; j< ( n & -4 ); j+=4 )
{
y_ptr[j] += *aj * xtemp;
y_ptr[j+1] += *(aj+lda) * xtemp;
y_ptr[j+2] += *(aj+lda2) * xtemp;
y_ptr[j+3] += *(aj+lda3) * xtemp;
aj += lda4 ;
}
for ( ; j<n; j++ )
{
y_ptr[j] += *aj * xtemp;
aj += lda;
}
}
else
{
for ( j=0; j<n; j++ )
{
*y_ptr += *aj * xtemp;
y_ptr += inc_y;
aj += lda;
}
} }
} }