OpenBLAS/kernel/riscv64/zaxpy_vector.c

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#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n) RISCV_RVV(vsetvl_e32m4)(n)
#define FLOAT_V_T vfloat32m4_t
#define VLSEV_FLOAT RISCV_RVV(vlse32_v_f32m4)
#define VSSEV_FLOAT RISCV_RVV(vsse32_v_f32m4)
#define VFMACCVF_FLOAT RISCV_RVV(vfmacc_vf_f32m4)
#define VFNMSACVF_FLOAT RISCV_RVV(vfnmsac_vf_f32m4)
#else
#define VSETVL(n) RISCV_RVV(vsetvl_e64m4)(n)
#define FLOAT_V_T vfloat64m4_t
#define VLSEV_FLOAT RISCV_RVV(vlse64_v_f64m4)
#define VSSEV_FLOAT RISCV_RVV(vsse64_v_f64m4)
#define VFMACCVF_FLOAT RISCV_RVV(vfmacc_vf_f64m4)
#define VFNMSACVF_FLOAT RISCV_RVV(vfnmsac_vf_f64m4)
#endif

#if !defined(DOUBLE)
inline int  small_caxpy_kernel(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)
#else
inline int  small_zaxpy_kernel(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)
#endif
{
	BLASLONG i=0;
	BLASLONG ix,iy;
	BLASLONG inc_x2;
	BLASLONG inc_y2;

	if ( n <= 0     )  return(0);
	if ( da_r == 0.0 && da_i == 0.0 ) return(0);

	ix = 0;
	iy = 0;

	inc_x2 = 2 * inc_x;
	inc_y2 = 2 * inc_y;

	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_x2 ;
		iy += inc_y2 ;
		i++ ;

	}
	return(0);

}

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)
{
#if !defined(DOUBLE)
        if(n < 16) {
                return small_caxpy_kernel(n, dummy0, dummy1, da_r, da_i, x, inc_x, y, inc_y, dummy, dummy2);
        }
#else
        if(n < 8) {
                return small_zaxpy_kernel(n, dummy0, dummy1, da_r, da_i, x, inc_x, y, inc_y, dummy, dummy2);
        }
#endif
        BLASLONG i = 0, j = 0;
        BLASLONG ix = 0,iy = 0;
        if(n <= 0) return(0);
        if(da_r == 0.0 && da_i == 0.0) return(0);
        unsigned int gvl = 0;
        BLASLONG stride_x = inc_x * 2 * sizeof(FLOAT);
        BLASLONG stride_y = inc_y * 2 * sizeof(FLOAT);

        FLOAT_V_T vx0, vx1, vy0, vy1;
        gvl = VSETVL(n);
        BLASLONG inc_xv = inc_x * 2 * gvl;
        BLASLONG inc_yv = inc_y * 2 * gvl;
        for(i=0,j=0; i < n/gvl; i++){
                vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                vx1 = VLSEV_FLOAT(&x[ix+1], stride_x, gvl);
                vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                vy1 = VLSEV_FLOAT(&y[iy+1], stride_y, gvl);
#if !defined(CONJ)
                vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, gvl);
                vy0 = VFNMSACVF_FLOAT(vy0, da_i, vx1, gvl);
                vy1 = VFMACCVF_FLOAT(vy1, da_r, vx1, gvl);
                vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, gvl);
#else
                vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, gvl);
                vy0 = VFMACCVF_FLOAT(vy0, da_i, vx1, gvl);
                vy1 = VFNMSACVF_FLOAT(vy1, da_r, vx1, gvl);
                vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, gvl);
#endif
                VSSEV_FLOAT(&y[iy], stride_y, vy0, gvl);
                VSSEV_FLOAT(&y[iy+1], stride_y, vy1, gvl);
                j += gvl;
                ix += inc_xv;
                iy += inc_yv;
        }
        if(j < n){
                gvl = VSETVL(n-j);
                vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                vx1 = VLSEV_FLOAT(&x[ix+1], stride_x, gvl);
                vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                vy1 = VLSEV_FLOAT(&y[iy+1], stride_y, gvl);
#if !defined(CONJ)
                vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, gvl);
                vy0 = VFNMSACVF_FLOAT(vy0, da_i, vx1, gvl);
                vy1 = VFMACCVF_FLOAT(vy1, da_r, vx1, gvl);
                vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, gvl);
#else
                vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, gvl);
                vy0 = VFMACCVF_FLOAT(vy0, da_i, vx1, gvl);
                vy1 = VFNMSACVF_FLOAT(vy1, da_r, vx1, gvl);
                vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, gvl);
#endif
                VSSEV_FLOAT(&y[iy], stride_y, vy0, gvl);
                VSSEV_FLOAT(&y[iy+1], stride_y, vy1, gvl);
        }
	return(0);
}