OpenBLAS/kernel/riscv64/trsm_kernel_RN_rvv_v1.c

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#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n)               __riscv_vsetvl_e32m2(n)
#define VSETVL_MAX              __riscv_vsetvlmax_e32m2()
#define FLOAT_V_T               vfloat32m2_t
#define FLOAT_VX2_T             vfloat32m2x2_t
#define VGET_VX2                __riscv_vget_v_f32m2x2_f32m2
#define VSET_VX2                __riscv_vset_v_f32m2_f32m2x2
#define VLEV_FLOAT              __riscv_vle32_v_f32m2
#define VSSEV_FLOAT             __riscv_vsse32_v_f32m2
#define VSEV_FLOAT              __riscv_vse32_v_f32m2
#define VLSEG2_FLOAT            __riscv_vlseg2e32_v_f32m2x2
#define VSSEG2_FLOAT            __riscv_vsseg2e32_v_f32m2x2
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f32m2
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f32m2
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f32m2
#else
#define VSETVL(n)               __riscv_vsetvl_e64m2(n)
#define VSETVL_MAX              __riscv_vsetvlmax_e64m2()
#define FLOAT_V_T               vfloat64m2_t
#define FLOAT_VX2_T             vfloat64m2x2_t
#define VGET_VX2                __riscv_vget_v_f64m2x2_f64m2
#define VSET_VX2                __riscv_vset_v_f64m2_f64m2x2
#define VLEV_FLOAT              __riscv_vle64_v_f64m2
#define VSSEV_FLOAT             __riscv_vsse64_v_f64m2
#define VSEV_FLOAT              __riscv_vse64_v_f64m2
#define VLSEG2_FLOAT            __riscv_vlseg2e64_v_f64m2x2
#define VSSEG2_FLOAT            __riscv_vsseg2e64_v_f64m2x2
#define VFMVVF_FLOAT            __riscv_vfmv_v_f_f64m2
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f64m2
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f64m2
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f64m2
#endif

static FLOAT dm1 = -1.;

#ifdef CONJ
#define GEMM_KERNEL   GEMM_KERNEL_R
#else
#define GEMM_KERNEL   GEMM_KERNEL_N
#endif

#if GEMM_DEFAULT_UNROLL_N == 1
#define GEMM_UNROLL_N_SHIFT 0
#endif

#if GEMM_DEFAULT_UNROLL_N == 2
#define GEMM_UNROLL_N_SHIFT 1
#endif

#if GEMM_DEFAULT_UNROLL_N == 4
#define GEMM_UNROLL_N_SHIFT 2
#endif

#if GEMM_DEFAULT_UNROLL_N == 8
#define GEMM_UNROLL_N_SHIFT 3
#endif

#if GEMM_DEFAULT_UNROLL_N == 16
#define GEMM_UNROLL_N_SHIFT 4
#endif

// Optimizes the implementation in ../arm64/trsm_kernel_RN_sve.c

#ifndef COMPLEX

static inline void solve(BLASLONG m, BLASLONG n, FLOAT *a, FLOAT *b, FLOAT *c, BLASLONG ldc) {

    FLOAT bb;
    FLOAT *pci, *pcj;

    int i, j, k;
    FLOAT_V_T va, vc;

    size_t vl;
    for (i = 0; i < n; i++) {

        bb = *(b + i);
        pci = c + i * ldc;
        pcj = c;
        for (j = m; j > 0; j -= vl) {
            vl = VSETVL(j);
            va = VLEV_FLOAT(pci, vl);
            va = VFMULVF_FLOAT(va, bb, vl);
            VSEV_FLOAT(a, va, vl);
            VSEV_FLOAT(pci, va, vl);
            a   += vl;
            pci += vl;
            for (k = i + 1; k < n; k ++){
                vc = VLEV_FLOAT(pcj + k * ldc, vl);
                vc = VFNMSACVF_FLOAT(vc, *(b + k), va, vl);
                VSEV_FLOAT(pcj + k * ldc, vc, vl);
            }
            pcj += vl;
        }
        b += n;
    }
}

#else

static inline void solve(BLASLONG m, BLASLONG n, FLOAT *a, FLOAT *b, FLOAT *c, BLASLONG ldc) {

    FLOAT bb1, bb2;

    FLOAT *pci, *pcj;

    int i, j, k;

    FLOAT_VX2_T vax2, vsx2, vcx2;
    FLOAT_V_T va1, va2, vs1, vs2, vc1, vc2;

    size_t vl;

    for (i = 0; i < n; i++) {

        bb1 = *(b + i * 2 + 0);
        bb2 = *(b + i * 2 + 1);

        pci = c + i * ldc * 2;
        pcj = c;

        for (j = m; j > 0; j -= vl) {
            vl = VSETVL(j);
            vax2 = VLSEG2_FLOAT(pci, vl);
            va1 = VGET_VX2(vax2, 0);
            va2 = VGET_VX2(vax2, 1);
#ifndef CONJ
            vs1 =   VFMULVF_FLOAT(va1, bb1, vl);
            vs1 = VFNMSACVF_FLOAT(vs1, bb2, va2, vl);
            vs2 =   VFMULVF_FLOAT(va1, bb2, vl);
            vs2 =  VFMACCVF_FLOAT(vs2, bb1, va2, vl);
#else
            vs1 =   VFMULVF_FLOAT(va1, bb1, vl);
            vs1 =  VFMACCVF_FLOAT(vs1, bb2, va2, vl);
            vs2 =   VFMULVF_FLOAT(va2, bb1, vl);
            vs2 = VFNMSACVF_FLOAT(vs2, bb2, va1, vl);
#endif
            vsx2 = VSET_VX2(vsx2, 0, vs1);
            vsx2 = VSET_VX2(vsx2, 1, vs2);
            VSSEG2_FLOAT(a, vsx2, vl);
            VSSEG2_FLOAT(pci, vsx2, vl);
            a += vl * 2;
            pci += vl * 2;

            for (k = i + 1; k < n; k ++){
                vcx2 = VLSEG2_FLOAT(pcj + k * ldc * 2, vl);
                vc1 = VGET_VX2(vcx2, 0);
                vc2 = VGET_VX2(vcx2, 1);
#ifndef CONJ
                vc1 =  VFMACCVF_FLOAT(vc1, *(b + k * 2 + 1), vs2, vl);
                vc1 = VFNMSACVF_FLOAT(vc1, *(b + k * 2 + 0), vs1, vl);
                vc2 = VFNMSACVF_FLOAT(vc2, *(b + k * 2 + 1), vs1, vl);
                vc2 = VFNMSACVF_FLOAT(vc2, *(b + k * 2 + 0), vs2, vl);
#else
                vc1 = VFNMSACVF_FLOAT(vc1, *(b + k * 2 + 0), vs1, vl);
                vc1 = VFNMSACVF_FLOAT(vc1, *(b + k * 2 + 1), vs2, vl);
                vc2 =  VFMACCVF_FLOAT(vc2, *(b + k * 2 + 1), vs1, vl);
                vc2 = VFNMSACVF_FLOAT(vc2, *(b + k * 2 + 0), vs2, vl);
#endif
                vcx2 = VSET_VX2(vcx2, 0, vc1);
                vcx2 = VSET_VX2(vcx2, 1, vc2);
                VSSEG2_FLOAT(pcj + k * ldc * 2, vcx2, vl);
            }
            pcj += vl * 2;
        }
        b += n * 2;
    }
}

#endif


int CNAME(BLASLONG m, BLASLONG n, BLASLONG k, FLOAT dummy1,
#ifdef COMPLEX
	   FLOAT dummy2,
#endif
	   FLOAT *a, FLOAT *b, FLOAT *c, BLASLONG ldc, BLASLONG offset){

  FLOAT *aa, *cc;
  BLASLONG  kk;
  BLASLONG i, j;

  size_t vl = VSETVL_MAX;

    //fprintf(stderr, "%s , %s, m = %4ld  n = %4ld  k = %4ld offset = %4ld\n", __FILE__, __FUNCTION__, m, n, k, offset); // Debug


  j = (n >> GEMM_UNROLL_N_SHIFT);
  kk = -offset;

  while (j > 0) {

    aa = a;
    cc = c;

    i = vl;

    if (i <= m) {
      do {
	if (kk > 0) {
	  GEMM_KERNEL(vl, GEMM_UNROLL_N, kk, dm1,
#ifdef COMPLEX
		      ZERO,
#endif
		      aa, b, cc, ldc);
	}

	solve(vl, GEMM_UNROLL_N,
	      aa + kk * vl * COMPSIZE,
	      b  + kk * GEMM_UNROLL_N * COMPSIZE,
	      cc, ldc);

	aa += vl * k * COMPSIZE;
	cc += vl     * COMPSIZE;
	i += vl;
      } while (i <= m);
    }


    i = m % vl;
    if (i) {
      if (kk > 0) {
        GEMM_KERNEL(i, GEMM_UNROLL_N, kk, dm1,
#ifdef COMPLEX
            ZERO,
#endif
            aa, b, cc, ldc);
      }
      solve(i, GEMM_UNROLL_N,
          aa + kk * i             * COMPSIZE,
          b  + kk * GEMM_UNROLL_N * COMPSIZE,
          cc, ldc);

      aa += i * k * COMPSIZE;
      cc += i     * COMPSIZE;

    }

    kk += GEMM_UNROLL_N;
    b += GEMM_UNROLL_N * k   * COMPSIZE;
    c += GEMM_UNROLL_N * ldc * COMPSIZE;
    j --;
  }

  if (n & (GEMM_UNROLL_N - 1)) {

    j = (GEMM_UNROLL_N >> 1);
    while (j > 0) {
      if (n & j) {

	aa = a;
	cc = c;

  i = vl;

	while (i <= m) {
	  if (kk > 0) {
	    GEMM_KERNEL(vl, j, kk, dm1,
#ifdef COMPLEX
			ZERO,
#endif
			aa,
			b,
			cc,
			ldc);
	  }

	  solve(vl, j,
		aa + kk * vl * COMPSIZE,
		b  + kk * j             * COMPSIZE, cc, ldc);

	  aa += vl * k * COMPSIZE;
	  cc += vl     * COMPSIZE;
	  i += vl;
	}

  i = m % vl;
  if (i) {
	      if (kk > 0) {
		GEMM_KERNEL(i, j, kk, dm1,
#ifdef COMPLEX
			    ZERO,
#endif
			    aa,
			    b,
			    cc,
			    ldc);
	      }

	      solve(i, j,
		    aa + kk * i * COMPSIZE,
		    b  + kk * j * COMPSIZE, cc, ldc);

	      aa += i * k * COMPSIZE;
	      cc += i     * COMPSIZE;

  }

	b += j * k   * COMPSIZE;
	c += j * ldc * COMPSIZE;
	kk += j;
      }
      j >>= 1;
    }
  }

  return 0;
}