added optimimized zgemv_t c-kernel

diff --git a/kernel/x86_64/zgemv_t.c b/kernel/x86_64/zgemv_t.c
new file mode 100644 (file)
index 0000000..a2dc45c
--- /dev/null
+++ b/kernel/x86_64/zgemv_t.c
@@ -0,0 +1,267 @@
+/***************************************************************************
+Copyright (c) 2014, The OpenBLAS Project
+All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+1. Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+notice, this list of conditions and the following disclaimer in
+the documentation and/or other materials provided with the
+distribution.
+3. Neither the name of the OpenBLAS project nor the names of
+its contributors may be used to endorse or promote products
+derived from this software without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*****************************************************************************/
+
+
+#include "common.h"
+
+/*
+#if defined(HASWELL)
+#include "zgemv_t_microk_haswell-2.c"
+#endif
+*/
+
+#define NBMAX 1028
+
+#ifndef HAVE_KERNEL_16x4
+
+static void zgemv_kernel_16x4(BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y)
+{
+       BLASLONG i;
+       FLOAT *a0,*a1,*a2,*a3;
+       a0 = ap[0];
+       a1 = ap[1];
+       a2 = ap[2];
+       a3 = ap[3];
+       FLOAT temp_r0 = 0.0;
+       FLOAT temp_r1 = 0.0;
+       FLOAT temp_r2 = 0.0;
+       FLOAT temp_r3 = 0.0;
+       FLOAT temp_i0 = 0.0;
+       FLOAT temp_i1 = 0.0;
+       FLOAT temp_i2 = 0.0;
+       FLOAT temp_i3 = 0.0;
+
+
+       for ( i=0; i< 2*n; i+=2 )
+       {
+#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
+               temp_r0 += a0[i]*x[i]   - a0[i+1]*x[i+1];               
+               temp_i0 += a0[i]*x[i+1] + a0[i+1]*x[i];         
+               temp_r1 += a1[i]*x[i]   - a1[i+1]*x[i+1];               
+               temp_i1 += a1[i]*x[i+1] + a1[i+1]*x[i];         
+               temp_r2 += a2[i]*x[i]   - a2[i+1]*x[i+1];               
+               temp_i2 += a2[i]*x[i+1] + a2[i+1]*x[i];         
+               temp_r3 += a3[i]*x[i]   - a3[i+1]*x[i+1];               
+               temp_i3 += a3[i]*x[i+1] + a3[i+1]*x[i];         
+#else
+               temp_r0 += a0[i]*x[i]   + a0[i+1]*x[i+1];               
+               temp_i0 += a0[i]*x[i+1] - a0[i+1]*x[i];         
+               temp_r1 += a1[i]*x[i]   + a1[i+1]*x[i+1];               
+               temp_i1 += a1[i]*x[i+1] - a1[i+1]*x[i];         
+               temp_r2 += a2[i]*x[i]   + a2[i+1]*x[i+1];               
+               temp_i2 += a2[i]*x[i+1] - a2[i+1]*x[i];         
+               temp_r3 += a3[i]*x[i]   + a3[i+1]*x[i+1];               
+               temp_i3 += a3[i]*x[i+1] - a3[i+1]*x[i];         
+#endif
+       }
+       y[0] = temp_r0;
+       y[1] = temp_i0;
+       y[2] = temp_r1;
+       y[3] = temp_i1;
+       y[4] = temp_r2;
+       y[5] = temp_i2;
+       y[6] = temp_r3;
+       y[7] = temp_i3;
+}
+       
+#endif
+
+static void zgemv_kernel_16x1(BLASLONG n, FLOAT *ap, FLOAT *x, FLOAT *y)
+{
+       BLASLONG i;
+       FLOAT *a0;
+       a0 = ap;
+       FLOAT temp_r = 0.0;
+       FLOAT temp_i = 0.0;
+
+       for ( i=0; i< 2*n; i+=2 )
+       {
+#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
+               temp_r += a0[i]*x[i]   - a0[i+1]*x[i+1];                
+               temp_i += a0[i]*x[i+1] + a0[i+1]*x[i];          
+#else
+               temp_r += a0[i]*x[i]   + a0[i+1]*x[i+1];                
+               temp_i += a0[i]*x[i+1] - a0[i+1]*x[i];          
+#endif
+       }
+       *y      = temp_r;
+       *(y+1)  = temp_i;
+}
+       
+static void copy_x(BLASLONG n, FLOAT *src, FLOAT *dest, BLASLONG inc_src)
+{
+        BLASLONG i;
+        for ( i=0; i<n; i++ )
+        {
+                *dest     = *src;
+                *(dest+1) = *(src+1);
+                dest+=2;
+                src += inc_src;
+        }
+}
+
+
+int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha_r, FLOAT alpha_i, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *buffer)
+{
+       BLASLONG i;
+       BLASLONG j;
+       FLOAT *a_ptr;
+       FLOAT *x_ptr;
+       FLOAT *y_ptr;
+       FLOAT *ap[8];
+       BLASLONG n1;
+       BLASLONG m1;
+       BLASLONG m2;
+       BLASLONG n2;
+       FLOAT ybuffer[8],*xbuffer;
+
+        inc_x *= 2;
+        inc_y *= 2;
+        lda   *= 2;
+
+       xbuffer = buffer;
+       
+       n1 = n / 4 ;
+       n2 = n % 4 ;
+       
+       m1 = m - ( m % 16 );
+       m2 = (m % NBMAX) - (m % 16) ;
+       
+
+       BLASLONG NB = NBMAX;
+
+       while ( NB == NBMAX )
+       {
+               
+               m1 -= NB;
+               if ( m1 < 0)
+               {
+                       if ( m2 == 0 ) break;   
+                       NB = m2;
+               }
+               
+               y_ptr = y;
+               a_ptr = a;
+               x_ptr = x;
+               copy_x(NB,x_ptr,xbuffer,inc_x);
+               for( i = 0; i < n1 ; i++)
+               {
+                       ap[0] = a_ptr;
+                       ap[1] = a_ptr + lda;
+                       ap[2] = ap[1] + lda;
+                       ap[3] = ap[2] + lda;
+                       zgemv_kernel_16x4(NB,ap,xbuffer,ybuffer);
+                       a_ptr += 4 * lda;
+
+#if !defined(XCONJ)
+                       y_ptr[0] += alpha_r * ybuffer[0] - alpha_i * ybuffer[1];
+                       y_ptr[1] += alpha_r * ybuffer[1] + alpha_i * ybuffer[0];
+                       y_ptr  += inc_y;
+                       y_ptr[0] += alpha_r * ybuffer[2] - alpha_i * ybuffer[3];
+                       y_ptr[1] += alpha_r * ybuffer[3] + alpha_i * ybuffer[2];
+                       y_ptr  += inc_y;
+                       y_ptr[0] += alpha_r * ybuffer[4] - alpha_i * ybuffer[5];
+                       y_ptr[1] += alpha_r * ybuffer[5] + alpha_i * ybuffer[4];
+                       y_ptr  += inc_y;
+                       y_ptr[0] += alpha_r * ybuffer[6] - alpha_i * ybuffer[7];
+                       y_ptr[1] += alpha_r * ybuffer[7] + alpha_i * ybuffer[6];
+                       y_ptr  += inc_y;
+#else
+                       y_ptr[0] += alpha_r * ybuffer[0] + alpha_i * ybuffer[1];
+                       y_ptr[1] -= alpha_r * ybuffer[1] - alpha_i * ybuffer[0];
+                       y_ptr  += inc_y;
+                       y_ptr[0] += alpha_r * ybuffer[2] + alpha_i * ybuffer[3];
+                       y_ptr[1] -= alpha_r * ybuffer[3] - alpha_i * ybuffer[2];
+                       y_ptr  += inc_y;
+                       y_ptr[0] += alpha_r * ybuffer[4] + alpha_i * ybuffer[5];
+                       y_ptr[1] -= alpha_r * ybuffer[5] - alpha_i * ybuffer[4];
+                       y_ptr  += inc_y;
+                       y_ptr[0] += alpha_r * ybuffer[6] + alpha_i * ybuffer[7];
+                       y_ptr[1] -= alpha_r * ybuffer[7] - alpha_i * ybuffer[6];
+                       y_ptr  += inc_y;
+#endif
+               }
+
+               for( i = 0; i < n2 ; i++)
+               {
+                       zgemv_kernel_16x1(NB,a_ptr,xbuffer,ybuffer);
+                       a_ptr += 1 * lda;
+
+#if !defined(XCONJ)
+                       y_ptr[0] += alpha_r * ybuffer[0] - alpha_i * ybuffer[1];
+                       y_ptr[1] += alpha_r * ybuffer[1] + alpha_i * ybuffer[0];
+                       y_ptr  += inc_y;
+#else
+                       y_ptr[0] += alpha_r * ybuffer[0] + alpha_i * ybuffer[1];
+                       y_ptr[1] -= alpha_r * ybuffer[1] - alpha_i * ybuffer[0];
+                       y_ptr  += inc_y;
+#endif
+
+               }
+               a += 2* NB;
+               x += NB * inc_x;        
+       }
+
+       BLASLONG m3 = m % 16;
+       if ( m3 == 0 ) return(0);
+
+       x_ptr = x;
+       copy_x(m3,x_ptr,xbuffer,inc_x);
+       j=0;
+       a_ptr = a;
+       y_ptr = y;
+       while ( j < n)
+       {
+               FLOAT temp_r = 0.0;
+               FLOAT temp_i = 0.0;
+               for( i = 0; i < m3*2; i+=2 )
+               {
+#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
+                       temp_r += a_ptr[i] * xbuffer[i]   - a_ptr[i+1] * xbuffer[i+1];
+                       temp_i += a_ptr[i] * xbuffer[i+1] + a_ptr[i+1] * xbuffer[i];
+#else
+                       temp_r += a_ptr[i] * xbuffer[i]   + a_ptr[i+1] * xbuffer[i+1];
+                       temp_i += a_ptr[i] * xbuffer[i+1] - a_ptr[i+1] * xbuffer[i];
+#endif
+               }
+               a_ptr += lda;
+
+#if !defined(XCONJ) 
+                y_ptr[0] += alpha_r * temp_r - alpha_i * temp_i;
+                y_ptr[1] += alpha_r * temp_i + alpha_i * temp_r;
+#else
+                y_ptr[0] += alpha_r * temp_r + alpha_i * temp_i;
+                y_ptr[1] -= alpha_r * temp_i - alpha_i * temp_r;
+#endif
+
+               y_ptr += inc_y;
+               j++;
+       }
+       return(0);
+}
+
+