OpenBLAS/kernel/zarch/zscal.c

/***************************************************************************
Copyright (c) 2013 - 2017, 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
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distribution.
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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
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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 *****************************************************************************/

#include "common.h"

 

static void   zscal_kernel_8(BLASLONG n, FLOAT da_r,FLOAT da_i, FLOAT *x) {
    BLASLONG tempR1 ;
    __asm__ (
             "pfd    2, 0(%[x_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     %%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" 
            "vfmdb  %%v16,  %%v20, %%v28        \n\t"
            "vfmdb  %%v17,  %%v21, %%v28        \n\t"
            "vfmdb  %%v18,  %%v22, %%v28        \n\t"
            "vfmdb  %%v19,  %%v23, %%v28        \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" 
            "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],%[x_tmp])  \n\t" 
            "vst    %%v17 , 16(%[t1],%[x_tmp])  \n\t" 
            "vst    %%v18 , 32(%[t1],%[x_tmp])  \n\t" 
            "vst    %%v19 , 48(%[t1],%[x_tmp])  \n\t"   
    
            "la     %[t1],64(%[t1] ) \n\t" 
            "2:  \n\t" 
            "pfd    2, 256(%[t1],%[x_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" 

            "vfmdb  %%v30,  %%v20, %%v28        \n\t"
            "vfmdb  %%v31,  %%v21, %%v28        \n\t"
            "vfmdb  %%v6,   %%v22, %%v28        \n\t"
            "vfmdb  %%v7,   %%v23, %%v28       \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" 

            "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"


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

             "clgrjl %[t1],%[tmp],1b         \n\t"   
//----------------------------------------------------------------------
            "vfmdb  %%v16,  %%v20, %%v28        \n\t"
            "vfmdb  %%v17,  %%v21, %%v28        \n\t"
            "vfmdb  %%v18,  %%v22, %%v28        \n\t"
            "vfmdb  %%v19,  %%v23, %%v28        \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],%[x_tmp])   \n\t" 
            "vst   %%v17 , 16(%[t1],%[x_tmp])   \n\t" 
            "vst   %%v18 , 32(%[t1],%[x_tmp])   \n\t" 
            "vst   %%v19 , 48(%[t1],%[x_tmp])   \n\t"   

            : [mem_x] "+m" (*(double (*)[2*n])x),[tmp]"+&r"(n) ,  [t1] "=&a" (tempR1) 
            : [x_tmp] "a"(x),  [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"
            );
            


}
 
static void   zscal_kernel_8_zero_r(BLASLONG n, FLOAT da_i, FLOAT *x) {
 
        __asm__ (   "pfd    2, 0(%1)          \n\t" 
                    "lgdr   %%r0,%[alpha]     \n\t"
                    "vlvgp  %%v16,%%r0,%%r0   \n\t" //load both from disjoint
                    "vflcdb %%v16,%%v16       \n\t" //complement both
                    "vlvgg  %%v16,%%r0,0      \n\t" //restore 1st                   
                    "vlr    %%v17 ,%%v16      \n\t" 
                    "sllg   %%r0,%[n],4       \n\t"  
                    "agr    %%r0,%[x_ptr]     \n\t"
                    ".align 16    \n\t"    
                    "1:     \n\t"  
                    "vl     %%v24, 0(%[x_ptr])      \n\t"
                    "vfmdb  %%v24,%%v24,%%v16        \n\t"
                    "vsteg  %%v24, 0(%[x_ptr]),1    \n\t" 
                    "vsteg  %%v24, 8(%[x_ptr]),0    \n\t" 
                    "vl     %%v25, 16(%[x_ptr])     \n\t"
                    "vfmdb  %%v25,%%v25,%%v17        \n\t"  
                    "vsteg  %%v25, 16(%[x_ptr]),1   \n\t" 
                    "vsteg  %%v25, 24(%[x_ptr]),0   \n\t" 
                    "vl     %%v26, 32(%[x_ptr])     \n\t"
                    "vfmdb  %%v26,%%v26,%%v16       \n\t"
                    "vsteg  %%v26, 32(%[x_ptr]),1   \n\t" 
                    "vsteg  %%v26, 40(%[x_ptr]),0   \n\t"   
                    "vl     %%v27, 48(%[x_ptr])     \n\t" 
                    "vfmdb  %%v27,%%v27,%%v17 \n\t"  
                    "vsteg  %%v27, 48(%[x_ptr]),1   \n\t" 
                    "vsteg  %%v27, 56(%[x_ptr]),0   \n\t" 
                    "vl     %%v28, 64(%[x_ptr])     \n\t"
                    "vfmdb  %%v28,%%v28,%%v16        \n\t"
                    "vsteg  %%v28, 64(%[x_ptr]),1   \n\t" 
                    "vsteg  %%v28, 72(%[x_ptr]),0   \n\t" 
                    "vl     %%v29, 80(%[x_ptr])     \n\t"
                    "vfmdb  %%v29,%%v29,%%v17        \n\t"  
                    "vsteg  %%v29, 80(%[x_ptr]),1   \n\t" 
                    "vsteg  %%v29, 88(%[x_ptr]),0   \n\t" 
                    "vl     %%v30, 96(%[x_ptr])     \n\t"
                    "vfmdb  %%v30,%%v30,%%v16       \n\t"
                    "vsteg  %%v30,  96(%[x_ptr]),1  \n\t" 
                    "vsteg  %%v30, 104(%[x_ptr]),0  \n\t"  
                    "vl     %%v31, 112(%[x_ptr])    \n\t" 
                    "vfmdb  %%v31,%%v31,%%v17 \n\t"  
                    "vsteg  %%v31, 112(%[x_ptr]),1  \n\t" 
                    "vsteg  %%v31, 120(%[x_ptr]),0  \n\t" 
                    "la     %[x_ptr],128(%[x_ptr])  \n\t"
                    "clgrjl %[x_ptr],%%r0,1b \n\t"
                    : [mem] "+m" (*(double (*)[2*n])x) ,[x_ptr] "+&a"(x)
                    : [n] "r"(n),[alpha] "f"(da_i)
                    :"cc", "r0","f0", "f1","v16","v17" ,"v24","v25","v26","v27","v28","v29","v30","v31" 
                 );


}

static void   zscal_kernel_8_zero_i(BLASLONG n, FLOAT da_r, FLOAT *x) {
           __asm__ ("pfd    2, 0(%[x_ptr])     \n\t"      
                    "lgdr   %%r0,%[alpha]      \n\t"
                    "vlvgp  %%v18,%%r0,%%r0    \n\t"
                    "vlr    %%v19,%%v18        \n\t"
                    "vlr    %%v16,%%v18        \n\t"
                    "vlr    %%v17,%%v18        \n\t" 
                    "sllg   %%r0,%[n],4        \n\t"  
                    "agr    %%r0,%[x_ptr]      \n\t"
                    ".align 16 \n\t"    
                    "1:    \n\t"  
                    "vl     %%v24, 0(%[x_ptr])  \n\t"
                    "vfmdb  %%v24,%%v24,%%v18   \n\t"
                    "vst    %%v24, 0(%[x_ptr])  \n\t" 
                    "vl     %%v25, 16(%[x_ptr]) \n\t"
                    "vfmdb  %%v25,%%v25,%%v19   \n\t"  
                    "vst    %%v25, 16(%[x_ptr]) \n\t" 
                    "vl     %%v26, 32(%[x_ptr]) \n\t"
                    "vfmdb  %%v26,%%v26,%%v16   \n\t"
                    "vst    %%v26, 32(%[x_ptr]) \n\t"  
                    "vl     %%v27, 48(%[x_ptr]) \n\t" 
                    "vfmdb  %%v27,%%v27,%%v17   \n\t"  
                    "vst    %%v27, 48(%[x_ptr]) \n\t"  
                    "vl     %%v28, 64(%[x_ptr]) \n\t"
                    "vfmdb  %%v28,%%v28,%%v18   \n\t"
                    "vst    %%v28, 64(%[x_ptr]) \n\t" 
                    "vl     %%v29, 80(%[x_ptr]) \n\t"
                    "vfmdb  %%v29,%%v29,%%v19   \n\t"  
                    "vst    %%v29, 80(%[x_ptr]) \n\t" 
                    "vl     %%v30, 96(%[x_ptr]) \n\t"
                    "vfmdb  %%v30,%%v30,%%v16   \n\t"
                    "vst    %%v30, 96(%[x_ptr]) \n\t"  
                    "vl     %%v31,112(%[x_ptr]) \n\t" 
                    "vfmdb  %%v31,%%v31,%%v17   \n\t"  
                    "vst    %%v31,112(%[x_ptr]) \n\t"
                    "la     %[x_ptr],128(%[x_ptr])   \n\t"
                    "clgrjl %[x_ptr],%%r0,1b    \n\t"
                    : [mem] "+m" (*(double (*)[2*n])x) ,[x_ptr] "+&a"(x)
                    : [n] "r"(n),[alpha] "f"(da_r)
                    : "cc", "r0","v16", "v17","v18","v19","v24","v25","v26","v27","v28","v29","v30","v31" 
                 );

}

static void  zscal_kernel_8_zero(BLASLONG n,  FLOAT *x) {

     __asm__ (      "pfd 2, 0(%[x_ptr])    \n\t"      
                    "vzero %%v24     \n\t"
                    "vzero %%v25     \n\t"
                    "vzero %%v26     \n\t"
                    "vzero %%v27     \n\t" 
                    "sllg  %%r0,%[n],4 \n\t"  
                    "agr   %%r0,%[x_ptr]   \n\t"
                    ".align 16 \n\t"    
                    "1: \n\t" 
                    "pfd     2, 256( %[x_ptr])  \n\t"     
                    "vst  %%v24,  0( %[x_ptr])  \n\t" 
                    "vst  %%v25, 16( %[x_ptr])  \n\t" 
                    "vst  %%v26, 32( %[x_ptr])  \n\t"   
                    "vst  %%v27, 48( %[x_ptr])  \n\t"  
                    "vst  %%v24, 64( %[x_ptr])  \n\t" 
                    "vst  %%v25, 80( %[x_ptr])  \n\t" 
                    "vst  %%v26, 96( %[x_ptr])  \n\t"  
                    "vst  %%v27,112( %[x_ptr])  \n\t"  
              
                    "la     %[x_ptr],128(%[x_ptr]) \n\t"
                    "clgrjl %[x_ptr],%%r0,1b \n\t"
                    : [mem] "+m" (*(double (*)[2*n])x),[x_ptr] "+&a"(x) 
                    : [n] "r"(n)
                    :"cc" ,"r0","v24","v25","v26","v27"
                 );

}





static void zscal_kernel_inc_8(BLASLONG n, FLOAT da_r,FLOAT da_i, FLOAT *x, BLASLONG inc_x) {

    BLASLONG i;
    BLASLONG inc_x2 = 2 * inc_x;
    BLASLONG inc_x3 = inc_x2 + inc_x;
    FLOAT t0, t1, t2, t3; 

    for (i = 0; i < n; i += 4) {
        t0 = da_r * x[0] - da_i * x[1];
        t1 = da_r * x[inc_x] - da_i * x[inc_x + 1];
        t2 = da_r * x[inc_x2] - da_i * x[inc_x2 + 1];
        t3 = da_r * x[inc_x3] - da_i * x[inc_x3 + 1];

        x[1] = da_i * x[0] + da_r * x[1];
        x[inc_x + 1] = da_i * x[inc_x] + da_r * x[inc_x + 1];
        x[inc_x2 + 1] = da_i * x[inc_x2] + da_r * x[inc_x2 + 1];
        x[inc_x3 + 1] = da_i * x[inc_x3] + da_r * x[inc_x3 + 1];

        x[0] = t0;
        x[inc_x] = t1;
        x[inc_x2] = t2;
        x[inc_x3] = t3;

        x += 4 * inc_x;

    }


}

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, j = 0;
    FLOAT temp0;
    FLOAT temp1;


    if (inc_x != 1) {
        inc_x <<= 1;

        if (da_r == 0.0) {

            BLASLONG n1 = n & -2;

            if (da_i == 0.0) {

                while (j < n1) {

                    x[i] = 0.0;
                    x[i + 1] = 0.0;
                    x[i + inc_x] = 0.0;
                    x[i + 1 + inc_x] = 0.0;
                    i += 2 * inc_x;
                    j += 2;

                }

                while (j < n) {

                    x[i] = 0.0;
                    x[i + 1] = 0.0;
                    i += inc_x;
                    j++;

                }

            } else {

                while (j < n1) {

                    temp0 = -da_i * x[i + 1];
                    x[i + 1] = da_i * x[i];
                    x[i] = temp0;
                    temp1 = -da_i * x[i + 1 + inc_x];
                    x[i + 1 + inc_x] = da_i * x[i + inc_x];
                    x[i + inc_x] = temp1;
                    i += 2 * inc_x;
                    j += 2;

                }

                while (j < n) {

                    temp0 = -da_i * x[i + 1];
                    x[i + 1] = da_i * x[i];
                    x[i] = temp0;
                    i += inc_x;
                    j++;

                }



            }

        } else {


            if (da_i == 0.0) {
                BLASLONG n1 = n & -2;

                while (j < n1) {

                    temp0 = da_r * x[i];
                    x[i + 1] = da_r * x[i + 1];
                    x[i] = temp0;
                    temp1 = da_r * x[i + inc_x];
                    x[i + 1 + inc_x] = da_r * x[i + 1 + inc_x];
                    x[i + inc_x] = temp1;
                    i += 2 * inc_x;
                    j += 2;

                }

                while (j < n) {

                    temp0 = da_r * x[i];
                    x[i + 1] = da_r * x[i + 1];
                    x[i] = temp0;
                    i += inc_x;
                    j++;

                }

            } else {

                BLASLONG n1 = n & -8;
                if (n1 > 0) { 
                    zscal_kernel_inc_8(n1, da_r,da_i, x, inc_x);
                    j = n1;
                    i = n1 * inc_x;
                }

                while (j < n) {

                    temp0 = da_r * x[i] - da_i * x[i + 1];
                    x[i + 1] = da_r * x[i + 1] + da_i * x[i];
                    x[i] = temp0;
                    i += inc_x;
                    j++;

                }

            }

        }

        return (0);
    }


    BLASLONG n1 = n & -8;
    if (n1 > 0) {


        if (da_r == 0.0)
            if (da_i == 0)
                zscal_kernel_8_zero(n1,  x);
            else
                zscal_kernel_8_zero_r(n1, da_i, x);
        else
            if (da_i == 0)
            zscal_kernel_8_zero_i(n1, da_r, x);
        else
            zscal_kernel_8(n1, da_r,da_i, x);

        i = n1 << 1;
        j = n1;
    }


    if (da_r == 0.0) {

        if (da_i == 0.0) {

            while (j < n) {

                x[i] = 0.0;
                x[i + 1] = 0.0;
                i += 2;
                j++;

            }

        } else {

            while (j < n) {

                temp0 = -da_i * x[i + 1];
                x[i + 1] = da_i * x[i];
                x[i] = temp0;
                i += 2;
                j++;

            }

        }

    } else {

        if (da_i == 0.0) {

            while (j < n) {

                temp0 = da_r * x[i];
                x[i + 1] = da_r * x[i + 1];
                x[i] = temp0;
                i += 2;
                j++;

            }

        } else {

            while (j < n) {

                temp0 = da_r * x[i] - da_i * x[i + 1];
                x[i + 1] = da_r * x[i + 1] + da_i * x[i];
                x[i] = temp0;
                i += 2;
                j++;

            }

        }

    }

    return (0);
}