OpenBLAS/kernel/arm64/symv_microk_sve_v1x4.c

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#include "common.h"
#include <arm_sve.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

static void symv_kernel_v1x4(BLASLONG from, BLASLONG to, FLOAT *a0, FLOAT *a1, FLOAT *a2, FLOAT *a3, 
                             FLOAT *x, FLOAT *y, FLOAT *temp1, FLOAT *temp2)
{
  SV_TYPE vtmpx0 = SV_DUP(temp1[0]);
  SV_TYPE vtmpx1 = SV_DUP(temp1[1]);
  SV_TYPE vtmpx2 = SV_DUP(temp1[2]);
  SV_TYPE vtmpx3 = SV_DUP(temp1[3]);
  SV_TYPE vtmpy0 = SV_DUP(0.0);
  SV_TYPE vtmpy1 = SV_DUP(0.0);
  SV_TYPE vtmpy2 = SV_DUP(0.0);
  SV_TYPE vtmpy3 = SV_DUP(0.0);
  SV_TYPE vx, vy;
  SV_TYPE vap0, vap1, vap2, vap3;
  BLASLONG i;
  uint64_t sve_size = SV_COUNT();
  svbool_t pg;

  for (i = from; i < to; i += sve_size) {
    pg = SV_WHILE(i, to);
    vy = svld1(pg, &y[i]);
    vx = svld1(pg, &x[i]);
    vap0 = svld1(pg, &a0[i]);
    vap1 = svld1(pg, &a1[i]);
    vap2 = svld1(pg, &a2[i]);
    vap3 = svld1(pg, &a3[i]);
    vy = svmla_m(pg, vy, vtmpx0, vap0);
    vy = svmla_m(pg, vy, vtmpx1, vap1);
    vy = svmla_m(pg, vy, vtmpx2, vap2);
    vy = svmla_m(pg, vy, vtmpx3, vap3);
    vtmpy0 = svmla_m(pg, vtmpy0, vx, vap0);
    vtmpy1 = svmla_m(pg, vtmpy1, vx, vap1);
    vtmpy2 = svmla_m(pg, vtmpy2, vx, vap2);
    vtmpy3 = svmla_m(pg, vtmpy3, vx, vap3);
    svst1(pg, &y[i], vy);
  }
  pg = SV_TRUE();
  temp2[0] += svaddv(pg, vtmpy0);
  temp2[1] += svaddv(pg, vtmpy1);
  temp2[2] += svaddv(pg, vtmpy2);
  temp2[3] += svaddv(pg, vtmpy3);
}