OpenBLAS/kernel/arm64/gemv_n_sve_v4x3.c

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#include <arm_sve.h>

#include "common.h"

#ifdef DOUBLE
#define SV_COUNT svcntd
#define SV_TYPE svfloat64_t
#define SV_TRUE svptrue_b64
#define SV_WHILE svwhilelt_b64_s64
#define SV_DUP svdup_f64
#else
#define SV_COUNT svcntw
#define SV_TYPE svfloat32_t
#define SV_TRUE svptrue_b32
#define SV_WHILE svwhilelt_b32_s64
#define SV_DUP svdup_f32
#endif

int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a,
          BLASLONG lda, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y,
          FLOAT *buffer)
{
  BLASLONG i;
  BLASLONG ix,iy;
  BLASLONG j;
  FLOAT *a_ptr;
  FLOAT temp;

  ix = 0;
  a_ptr = a;

  if (inc_y == 1) {
    BLASLONG width = (n + 3 - 1) / 3;

    FLOAT *a0_ptr = a_ptr + lda * width * 0;
    FLOAT *a1_ptr = a_ptr + lda * width * 1;
    FLOAT *a2_ptr = a_ptr + lda * width * 2;

    FLOAT *x0_ptr = x + inc_x * width * 0;
    FLOAT *x1_ptr = x + inc_x * width * 1;
    FLOAT *x2_ptr = x + inc_x * width * 2;

    for (j = 0; j < width; j++) {
      svbool_t pg00 = ((j + width * 0) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg10 = ((j + width * 0) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg20 = ((j + width * 0) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg30 = ((j + width * 0) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg01 = ((j + width * 1) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg11 = ((j + width * 1) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg21 = ((j + width * 1) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg31 = ((j + width * 1) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg02 = ((j + width * 2) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg12 = ((j + width * 2) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg22 = ((j + width * 2) < n) ? SV_TRUE() : svpfalse();
      svbool_t pg32 = ((j + width * 2) < n) ? SV_TRUE() : svpfalse();

      SV_TYPE temp0_vec = ((j + width * 0) < n) ? SV_DUP(alpha * x0_ptr[ix]) : SV_DUP(0.0);
      SV_TYPE temp1_vec = ((j + width * 1) < n) ? SV_DUP(alpha * x1_ptr[ix]) : SV_DUP(0.0);
      SV_TYPE temp2_vec = ((j + width * 2) < n) ? SV_DUP(alpha * x2_ptr[ix]) : SV_DUP(0.0);
      i = 0;
      BLASLONG sve_size = SV_COUNT();
      while ((i + sve_size * 4 - 1) < m) {
        SV_TYPE y0_vec = svld1_vnum(SV_TRUE(), y + i, 0);
        SV_TYPE y1_vec = svld1_vnum(SV_TRUE(), y + i, 1);
        SV_TYPE y2_vec = svld1_vnum(SV_TRUE(), y + i, 2);
        SV_TYPE y3_vec = svld1_vnum(SV_TRUE(), y + i, 3);

        SV_TYPE a00_vec = svld1_vnum(pg00, a0_ptr + i, 0);
        SV_TYPE a10_vec = svld1_vnum(pg10, a0_ptr + i, 1);
        SV_TYPE a20_vec = svld1_vnum(pg20, a0_ptr + i, 2);
        SV_TYPE a30_vec = svld1_vnum(pg30, a0_ptr + i, 3);
        SV_TYPE a01_vec = svld1_vnum(pg01, a1_ptr + i, 0);
        SV_TYPE a11_vec = svld1_vnum(pg11, a1_ptr + i, 1);
        SV_TYPE a21_vec = svld1_vnum(pg21, a1_ptr + i, 2);
        SV_TYPE a31_vec = svld1_vnum(pg31, a1_ptr + i, 3);
        SV_TYPE a02_vec = svld1_vnum(pg02, a2_ptr + i, 0);
        SV_TYPE a12_vec = svld1_vnum(pg12, a2_ptr + i, 1);
        SV_TYPE a22_vec = svld1_vnum(pg22, a2_ptr + i, 2);
        SV_TYPE a32_vec = svld1_vnum(pg32, a2_ptr + i, 3);

        y0_vec = svmla_m(pg00, y0_vec, temp0_vec, a00_vec);
        y1_vec = svmla_m(pg10, y1_vec, temp0_vec, a10_vec);
        y2_vec = svmla_m(pg20, y2_vec, temp0_vec, a20_vec);
        y3_vec = svmla_m(pg30, y3_vec, temp0_vec, a30_vec);
        y0_vec = svmla_m(pg01, y0_vec, temp1_vec, a01_vec);
        y1_vec = svmla_m(pg11, y1_vec, temp1_vec, a11_vec);
        y2_vec = svmla_m(pg21, y2_vec, temp1_vec, a21_vec);
        y3_vec = svmla_m(pg31, y3_vec, temp1_vec, a31_vec);
        y0_vec = svmla_m(pg02, y0_vec, temp2_vec, a02_vec);
        y1_vec = svmla_m(pg12, y1_vec, temp2_vec, a12_vec);
        y2_vec = svmla_m(pg22, y2_vec, temp2_vec, a22_vec);
        y3_vec = svmla_m(pg32, y3_vec, temp2_vec, a32_vec);

        svst1_vnum(SV_TRUE(), y + i, 0, y0_vec);
        svst1_vnum(SV_TRUE(), y + i, 1, y1_vec);
        svst1_vnum(SV_TRUE(), y + i, 2, y2_vec);
        svst1_vnum(SV_TRUE(), y + i, 3, y3_vec);
        i += sve_size * 4;
      }

      if (i < m) {
        svbool_t pg0 = SV_WHILE(i + sve_size * 0, m);
        svbool_t pg1 = SV_WHILE(i + sve_size * 1, m);
        svbool_t pg2 = SV_WHILE(i + sve_size * 2, m);
        svbool_t pg3 = SV_WHILE(i + sve_size * 3, m);

        pg00 = svand_z(SV_TRUE(), pg0, pg00);
        pg10 = svand_z(SV_TRUE(), pg1, pg10);
        pg20 = svand_z(SV_TRUE(), pg2, pg20);
        pg30 = svand_z(SV_TRUE(), pg3, pg30);
        pg01 = svand_z(SV_TRUE(), pg0, pg01);
        pg11 = svand_z(SV_TRUE(), pg1, pg11);
        pg21 = svand_z(SV_TRUE(), pg2, pg21);
        pg31 = svand_z(SV_TRUE(), pg3, pg31);
        pg02 = svand_z(SV_TRUE(), pg0, pg02);
        pg12 = svand_z(SV_TRUE(), pg1, pg12);
        pg22 = svand_z(SV_TRUE(), pg2, pg22);
        pg32 = svand_z(SV_TRUE(), pg3, pg32);

        SV_TYPE y0_vec = svld1_vnum(pg0, y + i, 0);
        SV_TYPE y1_vec = svld1_vnum(pg1, y + i, 1);
        SV_TYPE y2_vec = svld1_vnum(pg2, y + i, 2);
        SV_TYPE y3_vec = svld1_vnum(pg3, y + i, 3);

        SV_TYPE a00_vec = svld1_vnum(pg00, a0_ptr + i, 0);
        SV_TYPE a10_vec = svld1_vnum(pg10, a0_ptr + i, 1);
        SV_TYPE a20_vec = svld1_vnum(pg20, a0_ptr + i, 2);
        SV_TYPE a30_vec = svld1_vnum(pg30, a0_ptr + i, 3);
        SV_TYPE a01_vec = svld1_vnum(pg01, a1_ptr + i, 0);
        SV_TYPE a11_vec = svld1_vnum(pg11, a1_ptr + i, 1);
        SV_TYPE a21_vec = svld1_vnum(pg21, a1_ptr + i, 2);
        SV_TYPE a31_vec = svld1_vnum(pg31, a1_ptr + i, 3);
        SV_TYPE a02_vec = svld1_vnum(pg02, a2_ptr + i, 0);
        SV_TYPE a12_vec = svld1_vnum(pg12, a2_ptr + i, 1);
        SV_TYPE a22_vec = svld1_vnum(pg22, a2_ptr + i, 2);
        SV_TYPE a32_vec = svld1_vnum(pg32, a2_ptr + i, 3);

        y0_vec = svmla_m(pg00, y0_vec, temp0_vec, a00_vec);
        y1_vec = svmla_m(pg10, y1_vec, temp0_vec, a10_vec);
        y2_vec = svmla_m(pg20, y2_vec, temp0_vec, a20_vec);
        y3_vec = svmla_m(pg30, y3_vec, temp0_vec, a30_vec);
        y0_vec = svmla_m(pg01, y0_vec, temp1_vec, a01_vec);
        y1_vec = svmla_m(pg11, y1_vec, temp1_vec, a11_vec);
        y2_vec = svmla_m(pg21, y2_vec, temp1_vec, a21_vec);
        y3_vec = svmla_m(pg31, y3_vec, temp1_vec, a31_vec);
        y0_vec = svmla_m(pg02, y0_vec, temp2_vec, a02_vec);
        y1_vec = svmla_m(pg12, y1_vec, temp2_vec, a12_vec);
        y2_vec = svmla_m(pg22, y2_vec, temp2_vec, a22_vec);
        y3_vec = svmla_m(pg32, y3_vec, temp2_vec, a32_vec);

        svst1_vnum(pg0, y + i, 0, y0_vec);
        svst1_vnum(pg1, y + i, 1, y1_vec);
        svst1_vnum(pg2, y + i, 2, y2_vec);
        svst1_vnum(pg3, y + i, 3, y3_vec);
      }
      a0_ptr += lda;
      a1_ptr += lda;
      a2_ptr += lda;
      ix += inc_x;
    }
    return(0);
  }

  for (j = 0; j < n; j++) {
    temp = alpha * x[ix];
    iy = 0;
    for (i = 0; i < m; i++) {
      y[iy] += temp * a_ptr[i];
      iy += inc_y;
    }
    a_ptr += lda;
    ix += inc_x;
  }
  return (0);
}