zaxpy.c

/***************************************************************************
Copyright (c) 2013-2019, The OpenBLAS Project
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*****************************************************************************/

#include "common.h"

static void zaxpy_kernel_8(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha) {
  __asm__(
#if !defined(CONJ)
    "vlrepg %%v0,0(%[alpha])\n\t"
    "vleg   %%v1,8(%[alpha]),0\n\t"
    "wflcdb %%v1,%%v1\n\t"
    "vleg   %%v1,8(%[alpha]),1\n\t"
#else
    "vleg   %%v0,0(%[alpha]),1\n\t"
    "vflcdb %%v0,%%v0\n\t"
    "vleg   %%v0,0(%[alpha]),0\n\t"
    "vlrepg %%v1,8(%[alpha])\n\t"
#endif
    "srlg %[n],%[n],3\n\t"
    "xgr  %%r1,%%r1\n\t"
    "0:\n\t"
    "pfd 1, 1024(%%r1,%[x])\n\t"
    "pfd 2, 1024(%%r1,%[y])\n\t"
    "vl   %%v8,0(%%r1,%[x])\n\t"
    "vl   %%v9,16(%%r1,%[x])\n\t"
    "vl   %%v10,32(%%r1,%[x])\n\t"
    "vl   %%v11,48(%%r1,%[x])\n\t"
    "vl   %%v12,0(%%r1,%[y])\n\t"
    "vl   %%v13,16(%%r1,%[y])\n\t"
    "vl   %%v14,32(%%r1,%[y])\n\t"
    "vl   %%v15,48(%%r1,%[y])\n\t"
    "vl   %%v16,64(%%r1,%[x])\n\t"
    "vl   %%v17,80(%%r1,%[x])\n\t"
    "vl   %%v18,96(%%r1,%[x])\n\t"
    "vl   %%v19,112(%%r1,%[x])\n\t"
    "vl   %%v20,64(%%r1,%[y])\n\t"
    "vl   %%v21,80(%%r1,%[y])\n\t"
    "vl   %%v22,96(%%r1,%[y])\n\t"
    "vl   %%v23,112(%%r1,%[y])\n\t"
    "vpdi %%v24,%%v8,%%v8,4\n\t"
    "vpdi %%v25,%%v9,%%v9,4\n\t"
    "vpdi %%v26,%%v10,%%v10,4\n\t"
    "vpdi %%v27,%%v11,%%v11,4\n\t"
    "vpdi %%v28,%%v16,%%v16,4\n\t"
    "vpdi %%v29,%%v17,%%v17,4\n\t"
    "vpdi %%v30,%%v18,%%v18,4\n\t"
    "vpdi %%v31,%%v19,%%v19,4\n\t"
    "vfmadb %%v8,%%v8,%%v0,%%v12\n\t"
    "vfmadb %%v9,%%v9,%%v0,%%v13\n\t"
    "vfmadb %%v10,%%v10,%%v0,%%v14\n\t"
    "vfmadb %%v11,%%v11,%%v0,%%v15\n\t"
    "vfmadb %%v16,%%v16,%%v0,%%v20\n\t"
    "vfmadb %%v17,%%v17,%%v0,%%v21\n\t"
    "vfmadb %%v18,%%v18,%%v0,%%v22\n\t"
    "vfmadb %%v19,%%v19,%%v0,%%v23\n\t"
    "vfmadb %%v8,%%v24,%%v1,%%v8\n\t"
    "vfmadb %%v9,%%v25,%%v1,%%v9\n\t"
    "vfmadb %%v10,%%v26,%%v1,%%v10\n\t"
    "vfmadb %%v11,%%v27,%%v1,%%v11\n\t"
    "vfmadb %%v16,%%v28,%%v1,%%v16\n\t"
    "vfmadb %%v17,%%v29,%%v1,%%v17\n\t"
    "vfmadb %%v18,%%v30,%%v1,%%v18\n\t"
    "vfmadb %%v19,%%v31,%%v1,%%v19\n\t"
    "vst %%v8,0(%%r1,%[y])\n\t"
    "vst %%v9,16(%%r1,%[y])\n\t"
    "vst %%v10,32(%%r1,%[y])\n\t"
    "vst %%v11,48(%%r1,%[y])\n\t"
    "vst %%v16,64(%%r1,%[y])\n\t"
    "vst %%v17,80(%%r1,%[y])\n\t"
    "vst %%v18,96(%%r1,%[y])\n\t"
    "vst %%v19,112(%%r1,%[y])\n\t"
    "agfi  %%r1,128\n\t"
    "brctg %[n],0b"
    : "+m"(*(FLOAT (*)[n * 2]) y),[n] "+&r"(n)
    : [y] "a"(y), "m"(*(const FLOAT (*)[n * 2]) x),[x] "a"(x),
       "m"(*(const FLOAT (*)[2]) alpha),[alpha] "a"(alpha)
    : "cc", "r1", "v0", "v1", "v8", "v9", "v10", "v11", "v12", "v13",
       "v14", "v15", "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;
  FLOAT da[2] __attribute__ ((aligned(16)));

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

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

    BLASLONG n1 = n & -8;

    if (n1) {
      da[0] = da_r;
      da[1] = da_i;
      zaxpy_kernel_8(n1, x, y, da);
      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);

}