OpenBLAS/kernel/power/cgemv_n.c

/***************************************************************************
Copyright (c) 2019, The OpenBLAS Project
All rights reserved.
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modification, are permitted provided that the following conditions are
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1. Redistributions of source code must retain the above copyright
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2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
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distribution.
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its contributors may be used to endorse or promote products
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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#if !defined(__VEC__) || !defined(__ALTIVEC__)
#include "../arm/zgemv_n.c"
#else

#include <stdlib.h>
#include <stdio.h>
#include "common.h" 
#include <altivec.h>   
#define NBMAX 1024


static const unsigned char __attribute__((aligned(16))) swap_mask_arr[]={ 4,5,6,7,0,1,2,3, 12,13,14,15, 8,9,10,11};

 
static void cgemv_kernel_4x4(BLASLONG n, BLASLONG lda, FLOAT *ap, FLOAT *x, FLOAT *y) {
  
 FLOAT *a0, *a1, *a2, *a3;
    a0 = ap;
    a1 = ap + lda;
    a2 = a1 + lda;
    a3 = a2 + lda;
    __vector unsigned char swap_mask = *((__vector unsigned char*)swap_mask_arr);
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
    register __vector float vx0_r = {x[0], x[0],x[0], x[0]};
    register __vector float vx0_i = {-x[1], x[1],-x[1], x[1]};
    register __vector float vx1_r = {x[2], x[2],x[2], x[2]};
    register __vector float vx1_i = {-x[3], x[3],-x[3], x[3]};
    register __vector float vx2_r = {x[4], x[4],x[4], x[4]};
    register __vector float vx2_i = {-x[5], x[5],-x[5], x[5]};
    register __vector float vx3_r = {x[6], x[6],x[6], x[6]};
    register __vector float vx3_i = {-x[7], x[7],-x[7], x[7]};
#else
    register __vector float vx0_r = {x[0], -x[0],x[0], -x[0]};
    register __vector float vx0_i = {x[1], x[1],x[1], x[1]};
    register __vector float vx1_r = {x[2], -x[2],x[2], -x[2]};
    register __vector float vx1_i = {x[3], x[3],x[3], x[3]};
    register __vector float vx2_r = {x[4], -x[4],x[4], -x[4]};
    register __vector float vx2_i = {x[5], x[5],x[5], x[5]};
    register __vector float vx3_r = {x[6], -x[6],x[6], -x[6]};
    register __vector float vx3_i = {x[7], x[7],x[7], x[7]};
#endif
    register __vector float *vptr_y = (__vector float *) y;
    register __vector float *vptr_a0 = (__vector float *) a0;
    register __vector float *vptr_a1 = (__vector float *) a1;
    register __vector float *vptr_a2 = (__vector float *) a2;
    register __vector float *vptr_a3 = (__vector float *) a3; 
    BLASLONG  i = 0; 
    BLASLONG i2=16;
    for (;i< n * 8; i+=32,i2+=32) {
        register __vector float vy_0  = vec_vsx_ld(i,vptr_y);
        register __vector float vy_1  = vec_vsx_ld(i2,vptr_y);
        register __vector float va0   = vec_vsx_ld(i,vptr_a0);
        register __vector float va1   = vec_vsx_ld(i, vptr_a1);
        register __vector float va2   = vec_vsx_ld(i ,vptr_a2);
        register __vector float va3   = vec_vsx_ld(i ,vptr_a3);
        register __vector float va0_1 = vec_vsx_ld(i2 ,vptr_a0);
        register __vector float va1_1 = vec_vsx_ld(i2 ,vptr_a1);
        register __vector float va2_1 = vec_vsx_ld(i2 ,vptr_a2);
        register __vector float va3_1 = vec_vsx_ld(i2 ,vptr_a3);

        vy_0 += va0*vx0_r + va1*vx1_r + va2*vx2_r + va3*vx3_r;
        vy_1 += va0_1*vx0_r + va1_1*vx1_r + va2_1*vx2_r + va3_1*vx3_r;
        va0   = vec_perm(va0, va0,swap_mask);
        va0_1 = vec_perm(va0_1, va0_1,swap_mask);
        va1   = vec_perm(va1, va1,swap_mask);
        va1_1 = vec_perm(va1_1, va1_1,swap_mask);
        va2   = vec_perm(va2, va2,swap_mask);
        va2_1 = vec_perm(va2_1, va2_1,swap_mask);
        va3   = vec_perm(va3, va3,swap_mask);
        va3_1 = vec_perm(va3_1, va3_1,swap_mask);
        vy_0 += va0*vx0_i + va1*vx1_i + va2*vx2_i + va3*vx3_i;
        vy_1 += va0_1*vx0_i + va1_1*vx1_i + va2_1*vx2_i + va3_1*vx3_i;

        vec_vsx_st(vy_0 ,i,  vptr_y);
        vec_vsx_st(vy_1,i2,vptr_y);
    }

}	
 


static void cgemv_kernel_4x2(BLASLONG n, BLASLONG lda, FLOAT *ap, FLOAT *x, FLOAT *y) {
 
    FLOAT *a0, *a1;
    a0 = ap;
    a1 = ap + lda; 
    __vector unsigned char swap_mask = *((__vector unsigned char*)swap_mask_arr);
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
    register __vector float vx0_r = {x[0], x[0],x[0], x[0]};
    register __vector float vx0_i = {-x[1], x[1],-x[1], x[1]};
    register __vector float vx1_r = {x[2], x[2],x[2], x[2]};
    register __vector float vx1_i = {-x[3], x[3],-x[3], x[3]}; 
#else
    register __vector float vx0_r = {x[0], -x[0],x[0], -x[0]};
    register __vector float vx0_i = {x[1], x[1],x[1], x[1]};
    register __vector float vx1_r = {x[2], -x[2],x[2], -x[2]};
    register __vector float vx1_i = {x[3], x[3],x[3], x[3]}; 
#endif
    register __vector float *vptr_y = (__vector float *) y;
    register __vector float *vptr_a0 = (__vector float *) a0;
    register __vector float *vptr_a1 = (__vector float *) a1; 
    BLASLONG  i = 0;
    BLASLONG  i2 = 16;  
    for (;i< n * 8; i+=32, i2+=32) { 
        register __vector float vy_0  = vec_vsx_ld(i,vptr_y);
        register __vector float vy_1  = vec_vsx_ld(i2,vptr_y);
        register __vector float va0   = vec_vsx_ld(i,vptr_a0);
        register __vector float va1   = vec_vsx_ld(i, vptr_a1); 
        register __vector float va0_1 = vec_vsx_ld(i2 ,vptr_a0);
        register __vector float va1_1 = vec_vsx_ld(i2 ,vptr_a1); 

        register __vector float va0x   = vec_perm(va0, va0,swap_mask);
        register __vector float va0x_1 = vec_perm(va0_1, va0_1,swap_mask);
        register __vector float va1x   = vec_perm(va1, va1,swap_mask);
        register __vector float va1x_1 = vec_perm(va1_1, va1_1,swap_mask);
        vy_0 += va0*vx0_r + va1*vx1_r + va0x*vx0_i + va1x*vx1_i;
        vy_1 += va0_1*vx0_r + va1_1*vx1_r + va0x_1*vx0_i + va1x_1*vx1_i; 

        vec_vsx_st(vy_0 ,i,  vptr_y);
        vec_vsx_st(vy_1,i2,vptr_y);
    }

}

 

static void cgemv_kernel_4x1(BLASLONG n, FLOAT *ap, FLOAT *x, FLOAT *y) {

    __vector unsigned char swap_mask = *((__vector unsigned char*)swap_mask_arr);
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
    register __vector float vx0_r = {x[0], x[0],x[0], x[0]};
    register __vector float vx0_i = {-x[1], x[1],-x[1], x[1]}; 
#else
    register __vector float vx0_r = {x[0], -x[0],x[0], -x[0]};
    register __vector float vx0_i = {x[1], x[1],x[1], x[1]}; 
#endif
    register __vector float *vptr_y = (__vector float *) y;
    register __vector float *vptr_a0 = (__vector float *) ap; 
    BLASLONG  i = 0; 
    BLASLONG  i2 = 16;  
    for (;i< n * 8; i+=32, i2+=32) { 
        register __vector float vy_0  = vec_vsx_ld(i,vptr_y);
        register __vector float vy_1  = vec_vsx_ld(i2,vptr_y);
        register __vector float va0   = vec_vsx_ld(i,vptr_a0); 
        register __vector float va0_1 = vec_vsx_ld(i2 ,vptr_a0); 

        register __vector float va0x   = vec_perm(va0, va0,swap_mask);
        register __vector float va0x_1 = vec_perm(va0_1, va0_1,swap_mask);
        vy_0 += va0*vx0_r + va0x*vx0_i;
        vy_1 += va0_1*vx0_r + va0x_1*vx0_i; 

        vec_vsx_st(vy_0 ,i,  vptr_y);
        vec_vsx_st(vy_1,i2,vptr_y);
    }
}




static void add_y(BLASLONG n, FLOAT *src, FLOAT *dest, BLASLONG inc_dest, FLOAT alpha_r, FLOAT alpha_i) {
    BLASLONG i=0;


    if (inc_dest != 2) {
 		FLOAT temp_r;
		FLOAT temp_i;
		for ( i=0; i<n; i++ )
		{
#if !defined(XCONJ) 
			temp_r = alpha_r * src[0] - alpha_i * src[1];
			temp_i = alpha_r * src[1] + alpha_i * src[0];
#else
			temp_r =  alpha_r * src[0] + alpha_i * src[1];
			temp_i = -alpha_r * src[1] + alpha_i * src[0];
#endif

			*dest += temp_r;
			*(dest+1) += temp_i;

			src+=2;
			dest += inc_dest;
		}
        return;
    } else {
        __vector unsigned char swap_mask = *((__vector unsigned char*)swap_mask_arr);
#if   !defined(XCONJ) 

        register __vector float valpha_r = {alpha_r, alpha_r, alpha_r, alpha_r};
        register __vector float valpha_i = {-alpha_i, alpha_i, -alpha_i, alpha_i};

#else
        register __vector float valpha_r = {alpha_r, -alpha_r, alpha_r, -alpha_r};
        register __vector float valpha_i = {alpha_i, alpha_i, alpha_i, alpha_i};
#endif

        register __vector float *vptr_src = (__vector float *) src;
        register __vector float *vptr_y = (__vector float *) dest; 

    BLASLONG  i2 = 16;  
    for (;i< n * 8; i+=32, i2+=32) { 
        register __vector float vy_0  = vec_vsx_ld(i,vptr_y);
        register __vector float vy_1  = vec_vsx_ld(i2,vptr_y);


        register __vector float vsrc  = vec_vsx_ld(i,vptr_src);
        register __vector float vsrc_1  = vec_vsx_ld(i2,vptr_src);

        register __vector float vsrcx = vec_perm(vsrc, vsrc, swap_mask);
        register __vector float vsrcx_1 = vec_perm(vsrc_1, vsrc_1, swap_mask);

        vy_0 += vsrc*valpha_r + vsrcx*valpha_i;
        vy_1 += vsrc_1*valpha_r +  vsrcx_1*valpha_i;  

        vec_vsx_st(vy_0 ,i,  vptr_y);
        vec_vsx_st(vy_1,i2,vptr_y);

        }
 
    }
    return;
}



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=0;
    FLOAT *a_ptr;
    FLOAT *x_ptr;
    FLOAT *y_ptr;

    BLASLONG n1;
    BLASLONG m1;
    BLASLONG m2;
    BLASLONG m3;
    BLASLONG n2;
    FLOAT xbuffer[8] __attribute__((aligned(16)));
    FLOAT *ybuffer;

    if (m < 1) return (0);
    if (n < 1) return (0);

    ybuffer = buffer;

    inc_x *= 2;
    inc_y *= 2;
    lda *= 2;

    n1 = n / 4;
    n2 = n % 4;

    m3 = m % 4;
    m1 = m - (m % 4);
    m2 = (m % NBMAX) - (m % 4);

    y_ptr = y;

    BLASLONG NB = NBMAX;

    while (NB == NBMAX) {

        m1 -= NB;
        if (m1 < 0) {
            if (m2 == 0) break;
            NB = m2;
        }

        a_ptr = a;

        x_ptr = x; 

        memset(ybuffer, 0, NB * 2*sizeof(FLOAT));  

        if (inc_x == 2) {

            for (i = 0; i < n1; i++) {
                cgemv_kernel_4x4(NB, lda, a_ptr, x_ptr, ybuffer);

                a_ptr += lda << 2;
                x_ptr += 8;
            }

            if (n2 & 2) {
                cgemv_kernel_4x2(NB, lda, a_ptr, x_ptr, ybuffer);
                x_ptr += 4;
                a_ptr += 2 * lda;

            }

            if (n2 & 1) {
                cgemv_kernel_4x1(NB, a_ptr, x_ptr, ybuffer);
                x_ptr += 2;
                a_ptr += lda;

            }
        } else {

            for (i = 0; i < n1; i++) {

                xbuffer[0] = x_ptr[0];
                xbuffer[1] = x_ptr[1];
                x_ptr += inc_x;
                xbuffer[2] = x_ptr[0];
                xbuffer[3] = x_ptr[1];
                x_ptr += inc_x;
                xbuffer[4] = x_ptr[0];
                xbuffer[5] = x_ptr[1];
                x_ptr += inc_x;
                xbuffer[6] = x_ptr[0];
                xbuffer[7] = x_ptr[1];
                x_ptr += inc_x;

                cgemv_kernel_4x4(NB, lda, a_ptr, xbuffer, ybuffer);

                a_ptr += lda << 2;
            }

            for (i = 0; i < n2; i++) {
                xbuffer[0] = x_ptr[0];
                xbuffer[1] = x_ptr[1];
                x_ptr += inc_x;
                cgemv_kernel_4x1(NB, a_ptr, xbuffer, ybuffer);
                a_ptr += lda;

            }

        }

        add_y(NB, ybuffer, y_ptr, inc_y, alpha_r, alpha_i);
        a += 2 * NB;
        y_ptr += NB * inc_y;
    }

    if (m3 == 0) return (0);

    if (m3 == 1) {
        a_ptr = a;
        x_ptr = x;
        FLOAT temp_r = 0.0;
        FLOAT temp_i = 0.0;

        if (lda == 2 && inc_x == 2) {

            for (i = 0; i < (n & -2); i += 2) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
                temp_r += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
                temp_r += a_ptr[2] * x_ptr[2] - a_ptr[3] * x_ptr[3];
                temp_i += a_ptr[2] * x_ptr[3] + a_ptr[3] * x_ptr[2];
#else
                temp_r += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
                temp_r += a_ptr[2] * x_ptr[2] + a_ptr[3] * x_ptr[3];
                temp_i += a_ptr[2] * x_ptr[3] - a_ptr[3] * x_ptr[2];
#endif

                a_ptr += 4;
                x_ptr += 4;
            }

            for (; i < n; i++) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
                temp_r += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
#else
                temp_r += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
#endif

                a_ptr += 2;
                x_ptr += 2;
            }

        } else {

            for (i = 0; i < n; i++) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
                temp_r += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
#else
                temp_r += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
#endif

                a_ptr += lda;
                x_ptr += inc_x;
            }

        }
#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
        return (0);
    }

    if (m3 == 2) {
        a_ptr = a;
        x_ptr = x;
        FLOAT temp_r0 = 0.0;
        FLOAT temp_i0 = 0.0;
        FLOAT temp_r1 = 0.0;
        FLOAT temp_i1 = 0.0;

        if (lda == 4 && inc_x == 2) {

            for (i = 0; i < (n & -2); i += 2) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )

                temp_r0 += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] - a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] + a_ptr[3] * x_ptr[0];

                temp_r0 += a_ptr[4] * x_ptr[2] - a_ptr[5] * x_ptr[3];
                temp_i0 += a_ptr[4] * x_ptr[3] + a_ptr[5] * x_ptr[2];
                temp_r1 += a_ptr[6] * x_ptr[2] - a_ptr[7] * x_ptr[3];
                temp_i1 += a_ptr[6] * x_ptr[3] + a_ptr[7] * x_ptr[2];
#else
                temp_r0 += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] + a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] - a_ptr[3] * x_ptr[0];

                temp_r0 += a_ptr[4] * x_ptr[2] + a_ptr[5] * x_ptr[3];
                temp_i0 += a_ptr[4] * x_ptr[3] - a_ptr[5] * x_ptr[2];
                temp_r1 += a_ptr[6] * x_ptr[2] + a_ptr[7] * x_ptr[3];
                temp_i1 += a_ptr[6] * x_ptr[3] - a_ptr[7] * x_ptr[2];
#endif

                a_ptr += 8;
                x_ptr += 4;
            }

            for (; i < n; i++) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
                temp_r0 += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] - a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] + a_ptr[3] * x_ptr[0];
#else
                temp_r0 += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] + a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] - a_ptr[3] * x_ptr[0];
#endif

                a_ptr += 4;
                x_ptr += 2;
            }

        } else {

            for (i = 0; i < n; i++) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
                temp_r0 += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] - a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] + a_ptr[3] * x_ptr[0];
#else
                temp_r0 += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] + a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] - a_ptr[3] * x_ptr[0];
#endif

                a_ptr += lda;
                x_ptr += inc_x;
            }

        }
#if !defined(XCONJ) 
        y_ptr[0] += alpha_r * temp_r0 - alpha_i * temp_i0;
        y_ptr[1] += alpha_r * temp_i0 + alpha_i * temp_r0;
        y_ptr += inc_y;
        y_ptr[0] += alpha_r * temp_r1 - alpha_i * temp_i1;
        y_ptr[1] += alpha_r * temp_i1 + alpha_i * temp_r1;
#else
        y_ptr[0] += alpha_r * temp_r0 + alpha_i * temp_i0;
        y_ptr[1] -= alpha_r * temp_i0 - alpha_i * temp_r0;
        y_ptr += inc_y;
        y_ptr[0] += alpha_r * temp_r1 + alpha_i * temp_i1;
        y_ptr[1] -= alpha_r * temp_i1 - alpha_i * temp_r1;
#endif
        return (0);
    }

    if (m3 == 3) {
        a_ptr = a;
        x_ptr = x;
        FLOAT temp_r0 = 0.0;
        FLOAT temp_i0 = 0.0;
        FLOAT temp_r1 = 0.0;
        FLOAT temp_i1 = 0.0;
        FLOAT temp_r2 = 0.0;
        FLOAT temp_i2 = 0.0;

        if (lda == 6 && inc_x == 2) {

            for (i = 0; i < n; i++) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
                temp_r0 += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] - a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] + a_ptr[3] * x_ptr[0];
                temp_r2 += a_ptr[4] * x_ptr[0] - a_ptr[5] * x_ptr[1];
                temp_i2 += a_ptr[4] * x_ptr[1] + a_ptr[5] * x_ptr[0];
#else
                temp_r0 += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] + a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] - a_ptr[3] * x_ptr[0];
                temp_r2 += a_ptr[4] * x_ptr[0] + a_ptr[5] * x_ptr[1];
                temp_i2 += a_ptr[4] * x_ptr[1] - a_ptr[5] * x_ptr[0];
#endif

                a_ptr += 6;
                x_ptr += 2;
            }

        } else {

            for (i = 0; i < n; i++) {
#if ( !defined(CONJ) && !defined(XCONJ) ) || ( defined(CONJ) && defined(XCONJ) )
                temp_r0 += a_ptr[0] * x_ptr[0] - a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] + a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] - a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] + a_ptr[3] * x_ptr[0];
                temp_r2 += a_ptr[4] * x_ptr[0] - a_ptr[5] * x_ptr[1];
                temp_i2 += a_ptr[4] * x_ptr[1] + a_ptr[5] * x_ptr[0];
#else
                temp_r0 += a_ptr[0] * x_ptr[0] + a_ptr[1] * x_ptr[1];
                temp_i0 += a_ptr[0] * x_ptr[1] - a_ptr[1] * x_ptr[0];
                temp_r1 += a_ptr[2] * x_ptr[0] + a_ptr[3] * x_ptr[1];
                temp_i1 += a_ptr[2] * x_ptr[1] - a_ptr[3] * x_ptr[0];
                temp_r2 += a_ptr[4] * x_ptr[0] + a_ptr[5] * x_ptr[1];
                temp_i2 += a_ptr[4] * x_ptr[1] - a_ptr[5] * x_ptr[0];
#endif

                a_ptr += lda;
                x_ptr += inc_x;
            }

        }
#if !defined(XCONJ) 
        y_ptr[0] += alpha_r * temp_r0 - alpha_i * temp_i0;
        y_ptr[1] += alpha_r * temp_i0 + alpha_i * temp_r0;
        y_ptr += inc_y;
        y_ptr[0] += alpha_r * temp_r1 - alpha_i * temp_i1;
        y_ptr[1] += alpha_r * temp_i1 + alpha_i * temp_r1;
        y_ptr += inc_y;
        y_ptr[0] += alpha_r * temp_r2 - alpha_i * temp_i2;
        y_ptr[1] += alpha_r * temp_i2 + alpha_i * temp_r2;
#else
        y_ptr[0] += alpha_r * temp_r0 + alpha_i * temp_i0;
        y_ptr[1] -= alpha_r * temp_i0 - alpha_i * temp_r0;
        y_ptr += inc_y;
        y_ptr[0] += alpha_r * temp_r1 + alpha_i * temp_i1;
        y_ptr[1] -= alpha_r * temp_i1 - alpha_i * temp_r1;
        y_ptr += inc_y;
        y_ptr[0] += alpha_r * temp_r2 + alpha_i * temp_i2;
        y_ptr[1] -= alpha_r * temp_i2 - alpha_i * temp_r2;
#endif
        return (0);
    }

    return (0);
}
#endif