OpenBLAS/kernel/zarch/zaxpy.c

/***************************************************************************
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#include "common.h"

 
static void  zaxpy_kernel_8(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT da_r,FLOAT da_i) {

    BLASLONG tempR1 ;
    __asm__ ("pfd   1, 0(%[x_tmp]) \n\t"
             "pfd    2, 0(%[y_tmp]) \n\t" 
#if !defined(CONJ)
            "lgdr   %[t1],%[alpha_r]    \n\t" 
            "vlvgp  %%v28,%[t1],%[t1]   \n\t" //load both from disjoint          
            "lgdr   %[t1],%[alpha_i]    \n\t"  
            "vlvgp  %%v29,%[t1],%[t1]   \n\t" //load both from disjoint   
            "vflcdb %%v29,%%v29       \n\t" //complement both
            "vlvgg  %%v29,%[t1],1     \n\t" //restore 2nd  so that  {-alpha_i, alpha_i}   

#else
            "lgdr   %[t1],%[alpha_i]    \n\t"  
            "vlvgp  %%v29,%[t1],%[t1]   \n\t" //load both from disjoint        
            "lgdr   %[t1],%[alpha_r]    \n\t" 
            "vlvgp  %%v28,%[t1],%[t1]   \n\t" //load both from disjoint    
            "vflcdb %%v28,%%v28       \n\t" //complement both
            "vlvgg  %%v28,%[t1],0     \n\t" //restore 1st  so that  {alpha_r,-alpha_r}   
#endif           
                               
            "xgr     %[t1],%[t1]  \n\t" 
            "sllg   %[tmp],%[tmp],4    \n\t" 
            "vl   %%v30 ,  0(%[t1],%[y_tmp]) \n\t" 
            "vl   %%v31 , 16(%[t1],%[y_tmp]) \n\t" 
            "vl   %%v6 , 32(%[t1],%[y_tmp]) \n\t" 
            "vl   %%v7 , 48(%[t1],%[y_tmp]) \n\t" 
            "vl   %%v20 ,  0(%[t1],%[x_tmp]) \n\t" 
            "vl   %%v21 , 16(%[t1],%[x_tmp]) \n\t" 
            "vl   %%v22 , 32(%[t1],%[x_tmp]) \n\t" 
            "vl   %%v23 , 48(%[t1],%[x_tmp]) \n\t"                         
            "lay  %[tmp],-64 (%[tmp]) \n\t" //tmp-=64 so that t1+64 can break tmp condition
            "j 2f \n\t"
            ".align 16 \n\t"
            "1:     \n\t"
  
            "vpdi   %%v24 , %%v20, %%v20, 4     \n\t"
            "vpdi   %%v25 , %%v21, %%v21, 4     \n\t"
            "vpdi   %%v26 , %%v22, %%v22, 4     \n\t"
            "vpdi   %%v27 , %%v23, %%v23, 4     \n\t" 
            "vfmadb %%v16,  %%v20, %%v28, %%v16 \n\t"
            "vfmadb %%v17,  %%v21, %%v28, %%v17 \n\t"
            "vfmadb %%v18,  %%v22, %%v28, %%v18 \n\t"
            "vfmadb %%v19,  %%v23, %%v28, %%v19 \n\t"
            "vl     %%v30,  64(%[t1],%[y_tmp])  \n\t" 
            "vl     %%v31,  80(%[t1],%[y_tmp])  \n\t" 
            "vl     %%v6 ,  96(%[t1],%[y_tmp])  \n\t" 
            "vl     %%v7 , 112(%[t1],%[y_tmp])  \n\t" 
            "vfmadb %%v16,  %%v24, %%v29, %%v16 \n\t"
            "vfmadb %%v17,  %%v25, %%v29, %%v17 \n\t" 
            "vfmadb %%v18,  %%v26, %%v29, %%v18 \n\t"
            "vfmadb %%v19,  %%v27, %%v29, %%v19 \n\t"
            "vl     %%v20 , 64(%[t1],%[x_tmp])  \n\t" 
            "vl     %%v21 , 80(%[t1],%[x_tmp])  \n\t"      
            "vl     %%v22 , 96(%[t1],%[x_tmp])  \n\t" 
            "vl     %%v23 ,112(%[t1],%[x_tmp])  \n\t" 

            "vst    %%v16 ,  0(%[t1],%[y_tmp])  \n\t" 
            "vst    %%v17 , 16(%[t1],%[y_tmp])  \n\t" 
            "vst    %%v18 , 32(%[t1],%[y_tmp])  \n\t" 
            "vst    %%v19 , 48(%[t1],%[y_tmp])  \n\t"   
    
            "la     %[t1],64(%[t1] ) \n\t" 
            "2:  \n\t"
            "pfd    1, 256(%[t1],%[x_tmp])  \n\t"
            "pfd    2, 256(%[t1],%[y_tmp])  \n\t"  
            "vpdi   %%v24 , %%v20, %%v20, 4     \n\t"
            "vpdi   %%v25 , %%v21, %%v21, 4     \n\t"
            "vpdi   %%v26 , %%v22, %%v22, 4     \n\t"
            "vpdi   %%v27 , %%v23, %%v23, 4     \n\t" 

            "vfmadb %%v30,  %%v20, %%v28, %%v30 \n\t"
            "vfmadb %%v31,  %%v21, %%v28, %%v31 \n\t"
            "vfmadb %%v6,  %%v22, %%v28, %%v6   \n\t"
            "vfmadb %%v7,  %%v23, %%v28, %%v7   \n\t"
            "vl     %%v16,  64(%[t1],%[y_tmp])  \n\t" 
            "vl     %%v17,  80(%[t1],%[y_tmp])  \n\t" 
            "vl     %%v18,  96(%[t1],%[y_tmp])  \n\t" 
            "vl     %%v19, 112(%[t1],%[y_tmp])  \n\t" 
            "vfmadb %%v30,  %%v24, %%v29, %%v30 \n\t"
            "vfmadb %%v31,  %%v25, %%v29, %%v31 \n\t"
            "vfmadb %%v6,  %%v26, %%v29, %%v6   \n\t"
            "vfmadb %%v7,  %%v27, %%v29, %%v7   \n\t"

            "vl     %%v20 , 64(%[t1],%[x_tmp])  \n\t" 
            "vl     %%v21 , 80(%[t1],%[x_tmp])  \n\t"  
            "vl     %%v22 , 96(%[t1],%[x_tmp])  \n\t" 
            "vl     %%v23 ,112(%[t1],%[x_tmp])  \n\t" 

            "vst    %%v30 ,  0(%[t1],%[y_tmp])  \n\t" 
            "vst    %%v31 , 16(%[t1],%[y_tmp])  \n\t" 
            "vst    %%v6 ,  32(%[t1],%[y_tmp])  \n\t" 
            "vst    %%v7 ,  48(%[t1],%[y_tmp])  \n\t"  
 
            "la     %[t1],64(%[t1] ) \n\t"
          

             "clgrjl %[t1],%[tmp],1b         \n\t"   
//----------------------------------------------------------------------
            "vfmadb %%v16,  %%v20, %%v28, %%v16 \n\t"
            "vfmadb %%v17,  %%v21, %%v28, %%v17 \n\t"
            "vfmadb %%v18,  %%v22, %%v28, %%v18 \n\t"
            "vfmadb %%v19,  %%v23, %%v28, %%v19 \n\t" 
            "vpdi   %%v24 , %%v20, %%v20, 4     \n\t"
            "vpdi   %%v25 , %%v21, %%v21, 4     \n\t" 
            "vpdi   %%v26 , %%v22, %%v22, 4     \n\t"
            "vpdi   %%v27 , %%v23, %%v23, 4     \n\t"             
            "vfmadb %%v16,  %%v24, %%v29, %%v16 \n\t"
            "vfmadb %%v17,  %%v25, %%v29, %%v17 \n\t"
            "vfmadb %%v18,  %%v26, %%v29, %%v18 \n\t"
            "vfmadb %%v19,  %%v27, %%v29, %%v19 \n\t"

            "vst   %%v16 ,  0(%[t1],%[y_tmp])   \n\t" 
            "vst   %%v17 , 16(%[t1],%[y_tmp])   \n\t" 
            "vst   %%v18 , 32(%[t1],%[y_tmp])   \n\t" 
            "vst   %%v19 , 48(%[t1],%[y_tmp])   \n\t"   

            : [mem_y] "+m" (*(double (*)[2*n])y),[tmp]"+&r"(n) ,  [t1] "=&a" (tempR1) 
            : [mem_x] "m" (*(const double (*)[2*n])x), [x_tmp] "a"(x), [y_tmp] "a"(y), [alpha_r] "f"(da_r),[alpha_i] "f"(da_i)
            : "cc",  "v6","v7", "v16",
            "v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31"
            );

}


int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da_r, FLOAT da_i, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2) {
    BLASLONG i = 0;
    BLASLONG ix = 0, iy = 0;

    if (n <= 0) return (0);

    if ((inc_x == 1) && (inc_y == 1)) {

        BLASLONG n1 = n & -8;

        if (n1) { 
            zaxpy_kernel_8(n1, x, y, da_r,da_i);
            ix = 2 * n1;
        }
        i = n1;
        while (i < n) {
#if !defined(CONJ)
            y[ix] += (da_r * x[ix] - da_i * x[ix + 1]);
            y[ix + 1] += (da_r * x[ix + 1] + da_i * x[ix]);
#else
            y[ix] += (da_r * x[ix] + da_i * x[ix + 1]);
            y[ix + 1] -= (da_r * x[ix + 1] - da_i * x[ix]);
#endif
            i++;
            ix += 2;

        }
        return (0);


    }

    inc_x *= 2;
    inc_y *= 2;

    while (i < n) {

#if !defined(CONJ)
        y[iy] += (da_r * x[ix] - da_i * x[ix + 1]);
        y[iy + 1] += (da_r * x[ix + 1] + da_i * x[ix]);
#else
        y[iy] += (da_r * x[ix] + da_i * x[ix + 1]);
        y[iy + 1] -= (da_r * x[ix + 1] - da_i * x[ix]);
#endif
        ix += inc_x;
        iy += inc_y;
        i++;

    }
    return (0);

}