OSchip
/
OpenBLAS

/***************************************************************************
Copyright (c) 2013-2018, 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
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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(POWER8) || defined(POWER9)

static void crot_kernel_8 (long n, float *x, float *y, float c, float s)
{
  __vector float t0;
  __vector float t1;
  __vector float t2;
  __vector float t3;
  __vector float t4;
  __vector float t5;
  __vector float t6;
  __vector float t7;
  __asm__
    (
       "xscvdpspn   36, %x[cos]               \n\t" // load c to all words
       "xxspltw     36, 36, 0                 \n\t" 
       "xscvdpspn   37, %x[sin]               \n\t" // load s to all words
       "xxspltw     37, 37, 0                 \n\t" 
       "lxvd2x      32, 0, %[x_ptr]           \n\t" // load x
       "lxvd2x      33, %[i16], %[x_ptr]      \n\t" 
       "lxvd2x      34, %[i32], %[x_ptr]      \n\t" 
       "lxvd2x      35, %[i48], %[x_ptr]      \n\t" 
       "lxvd2x      48, 0, %[y_ptr]           \n\t" // load y
       "lxvd2x      49, %[i16], %[y_ptr]      \n\t" 
       "lxvd2x      50, %[i32], %[y_ptr]      \n\t" 
       "lxvd2x      51, %[i48], %[y_ptr]      \n\t" 
       "addi        %[x_ptr], %[x_ptr], 64    \n\t" 
       "addi        %[y_ptr], %[y_ptr], 64    \n\t" 
       "addic.      %[temp_n], %[temp_n], -8  \n\t" 
       "ble         two%=                        \n\t" 
       ".align    5                         \n\t" 
       "one%=:                                    \n\t" 
       "xvmulsp     40, 32, 36                \n\t" // c * x
       "xvmulsp     41, 33, 36                \n\t" 
       "xvmulsp     42, 34, 36                \n\t" 
       "xvmulsp     43, 35, 36                \n\t" 
       "xvmulsp     %x[x0], 48, 36            \n\t" // c * y
       "xvmulsp     %x[x2], 49, 36            \n\t" 
       "xvmulsp     %x[x1], 50, 36            \n\t" 
       "xvmulsp     %x[x3], 51, 36            \n\t" 
       "xvmulsp     44, 32, 37                \n\t" // s * x
       "xvmulsp     45, 33, 37                \n\t" 
       "lxvd2x      32, 0, %[x_ptr]           \n\t" // load x
       "lxvd2x      33, %[i16], %[x_ptr]      \n\t" 
       "xvmulsp     46, 34, 37                \n\t" 
       "xvmulsp     47, 35, 37                \n\t" 
       "lxvd2x      34, %[i32], %[x_ptr]      \n\t" 
       "lxvd2x      35, %[i48], %[x_ptr]      \n\t" 
       "xvmulsp     %x[x4], 48, 37            \n\t" // s * y
       "xvmulsp     %x[x5], 49, 37            \n\t" 
       "lxvd2x      48, 0, %[y_ptr]           \n\t" // load y
       "lxvd2x      49, %[i16], %[y_ptr]      \n\t" 
       "xvmulsp     %x[x6], 50, 37            \n\t" 
       "xvmulsp     %x[x7], 51, 37            \n\t" 
       "lxvd2x      50, %[i32], %[y_ptr]      \n\t" 
       "lxvd2x      51, %[i48], %[y_ptr]      \n\t" 
       "xvaddsp     40, 40, %x[x4]            \n\t" // c * x + s * y
       "xvaddsp     41, 41, %x[x5]            \n\t" // c * x + s * y
       "addi        %[x_ptr], %[x_ptr], -64   \n\t" 
       "addi        %[y_ptr], %[y_ptr], -64   \n\t" 
       "xvaddsp     42, 42, %x[x6]            \n\t" // c * x + s * y
       "xvaddsp     43, 43, %x[x7]            \n\t" // c * x + s * y
       "xvsubsp     %x[x0], %x[x0], 44        \n\t" // c * y - s * x
       "xvsubsp     %x[x2], %x[x2], 45        \n\t" // c * y - s * x
       "xvsubsp     %x[x1], %x[x1], 46        \n\t" // c * y - s * x
       "xvsubsp     %x[x3], %x[x3], 47        \n\t" // c * y - s * x
       "stxvd2x     40, 0, %[x_ptr]           \n\t" // store x
       "stxvd2x     41, %[i16], %[x_ptr]      \n\t" 
       "stxvd2x     42, %[i32], %[x_ptr]      \n\t" 
       "stxvd2x     43, %[i48], %[x_ptr]      \n\t" 
       "stxvd2x     %x[x0], 0, %[y_ptr]       \n\t" // store y
       "stxvd2x     %x[x2], %[i16], %[y_ptr]  \n\t" 
       "stxvd2x     %x[x1], %[i32], %[y_ptr]  \n\t" 
       "stxvd2x     %x[x3], %[i48], %[y_ptr]  \n\t" 
       "addi        %[x_ptr], %[x_ptr], 128   \n\t" 
       "addi        %[y_ptr], %[y_ptr], 128   \n\t" 
       "addic.      %[temp_n], %[temp_n], -8  \n\t" 
       "bgt         one%=                        \n\t" 
       "two%=:                                    \n\t" 
       "xvmulsp     40, 32, 36                \n\t" // c * x
       "xvmulsp     41, 33, 36                \n\t" 
       "xvmulsp     42, 34, 36                \n\t" 
       "xvmulsp     43, 35, 36                \n\t" 
       "xvmulsp     %x[x0], 48, 36            \n\t" // c * y
       "xvmulsp     %x[x2], 49, 36            \n\t" 
       "xvmulsp     %x[x1], 50, 36            \n\t" 
       "xvmulsp     %x[x3], 51, 36            \n\t" 
       "xvmulsp     44, 32, 37                \n\t" // s * x
       "xvmulsp     45, 33, 37                \n\t" 
       "xvmulsp     46, 34, 37                \n\t" 
       "xvmulsp     47, 35, 37                \n\t" 
       "xvmulsp     %x[x4], 48, 37            \n\t" // s * y
       "xvmulsp     %x[x5], 49, 37            \n\t" 
       "xvmulsp     %x[x6], 50, 37            \n\t" 
       "xvmulsp     %x[x7], 51, 37            \n\t" 
       "addi        %[x_ptr], %[x_ptr], -64   \n\t" 
       "addi        %[y_ptr], %[y_ptr], -64   \n\t" 
       "xvaddsp     40, 40, %x[x4]            \n\t" // c * x + s * y
       "xvaddsp     41, 41, %x[x5]            \n\t" // c * x + s * y
       "xvaddsp     42, 42, %x[x6]            \n\t" // c * x + s * y
       "xvaddsp     43, 43, %x[x7]            \n\t" // c * x + s * y
       "xvsubsp     %x[x0], %x[x0], 44        \n\t" // c * y - s * x
       "xvsubsp     %x[x2], %x[x2], 45        \n\t" // c * y - s * x
       "xvsubsp     %x[x1], %x[x1], 46        \n\t" // c * y - s * x
       "xvsubsp     %x[x3], %x[x3], 47        \n\t" // c * y - s * x
       "stxvd2x     40, 0, %[x_ptr]           \n\t" // store x
       "stxvd2x     41, %[i16], %[x_ptr]      \n\t" 
       "stxvd2x     42, %[i32], %[x_ptr]      \n\t" 
       "stxvd2x     43, %[i48], %[x_ptr]      \n\t" 
       "stxvd2x     %x[x0], 0, %[y_ptr]       \n\t" // store y
       "stxvd2x     %x[x2], %[i16], %[y_ptr]  \n\t" 
       "stxvd2x     %x[x1], %[i32], %[y_ptr]  \n\t" 
       "stxvd2x     %x[x3], %[i48], %[y_ptr]  "
     :
       [mem_x]  "+m"  (*(float (*)[2*n])x),
       [mem_y]  "+m"  (*(float (*)[2*n])y),
       [temp_n] "+r"  (n),
       [x_ptr]  "+&b" (x),
       [y_ptr]  "+&b" (y),
       [x0]     "=wa" (t0),
       [x1]     "=wa" (t2),
       [x2]     "=wa" (t1),
       [x3]     "=wa" (t3),
       [x4]     "=wa" (t4),
       [x5]     "=wa" (t5),
       [x6]     "=wa" (t6),
       [x7]     "=wa" (t7)     
     : 
       [cos]    "f"   (c),
       [sin]    "f"   (s),
       [i16]    "b"   (16),
       [i32]    "b"   (32),
       [i48]    "b"   (48)     
     :
       "cr0",
       "vs32","vs33","vs34","vs35","vs36","vs37",
       "vs40","vs41","vs42","vs43","vs44","vs45","vs46","vs47",
       "vs48","vs49","vs50","vs51"
     );
}
 
#endif


int CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT c, FLOAT s)
{
   BLASLONG i=0;
    BLASLONG ix=0,iy=0;
    FLOAT temp[2];
    BLASLONG inc_x2;
    BLASLONG inc_y2;

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

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

        BLASLONG n1 = n & -8; 
        if ( n1 > 0 )
        { 
            crot_kernel_8(n1, x, y, c, s);
            i=n1; 
            ix=2*n1; 
        }

         while(i < n)
           {
                temp[0]   = c*x[ix]   + s*y[ix] ;
                temp[1]   = c*x[ix+1] + s*y[ix+1] ;
                y[ix]     = c*y[ix]   - s*x[ix] ;
                y[ix+1]   = c*y[ix+1] - s*x[ix+1] ;
                x[ix]     = temp[0] ;
                x[ix+1]   = temp[1] ;

                ix += 2 ; 
                i++ ;

            }

    }
    else
    {
        inc_x2 = 2 * inc_x ;
        inc_y2 = 2 * inc_y ;
        while(i < n)
        {
            temp[0]   = c*x[ix]   + s*y[iy] ;
            temp[1]   = c*x[ix+1] + s*y[iy+1] ;
            y[iy]     = c*y[iy]   - s*x[ix] ;
            y[iy+1]   = c*y[iy+1] - s*x[ix+1] ;
            x[ix]     = temp[0] ;
            x[ix+1]   = temp[1] ;

            ix += inc_x2 ;
            iy += inc_y2 ;
            i++ ;

        }
    }
	return(0);
}