OpenBLAS/kernel/riscv64/axpby_rvv.c

/***************************************************************************
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#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n)               __riscv_vsetvl_e32m8(n)
#define FLOAT_V_T               vfloat32m8_t
#define VLEV_FLOAT              __riscv_vle32_v_f32m8
#define VLSEV_FLOAT             __riscv_vlse32_v_f32m8
#define VSEV_FLOAT              __riscv_vse32_v_f32m8
#define VSSEV_FLOAT             __riscv_vsse32_v_f32m8
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f32m8
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f32m8
#define VFMVVF_FLOAT            __riscv_vfmv_v_f_f32m8
#else
#define VSETVL(n)               __riscv_vsetvl_e64m8(n)
#define FLOAT_V_T               vfloat64m8_t
#define VLEV_FLOAT              __riscv_vle64_v_f64m8
#define VLSEV_FLOAT             __riscv_vlse64_v_f64m8
#define VSEV_FLOAT              __riscv_vse64_v_f64m8
#define VSSEV_FLOAT             __riscv_vsse64_v_f64m8
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f64m8
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f64m8
#define VFMVVF_FLOAT            __riscv_vfmv_v_f_f64m8
#endif

int CNAME(BLASLONG n, FLOAT alpha, FLOAT *x, BLASLONG inc_x, FLOAT beta, FLOAT *y, BLASLONG inc_y)
{
    FLOAT_V_T vx, vy;

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

    if ( beta == 0.0 ) {
        if ( alpha == 0.0 ) {
            if (1 == inc_y) {
                memset(&y[0], 0, n * sizeof(FLOAT));
            } else {
                BLASLONG stride_y = inc_y * sizeof(FLOAT);
                size_t vl = VSETVL(n);
                vy = VFMVVF_FLOAT(0.0, vl);
                for ( ; n > 0; n -= vl, y += vl*inc_y) {
                    vl = VSETVL(n);
                    VSSEV_FLOAT(y, stride_y, vy, vl);
                }
            }

        } else {
            if ((1 == inc_x) && (1 == inc_y)) {
                for (size_t vl; n > 0; n -= vl, x += vl, y += vl) {
                    vl = VSETVL(n);
                    vx = VLEV_FLOAT(x, vl);
                    vy = VFMULVF_FLOAT(vx, alpha, vl);
                    VSEV_FLOAT (y, vy, vl);
                }
            } else if (1 == inc_x) {
                BLASLONG stride_y = inc_y * sizeof(FLOAT);
                for (size_t vl; n > 0; n -= vl, x += vl, y += vl*inc_y) {
                    vl = VSETVL(n);
                    vx = VLEV_FLOAT(x, vl);
                    vy = VFMULVF_FLOAT(vx, alpha, vl);
                    VSSEV_FLOAT (y, stride_y, vy, vl);
                }
            } else if (1 == inc_y) {
                BLASLONG stride_x = inc_x * sizeof(FLOAT);
                for (size_t vl; n > 0; n -= vl, x += vl*inc_x, y += vl) {
                    vl = VSETVL(n);
                    vx = VLSEV_FLOAT(x, stride_x, vl);
                    vy = VFMULVF_FLOAT(vx, alpha, vl);
                    VSEV_FLOAT (y, vy, vl);
                }
            } else {
                BLASLONG stride_x = inc_x * sizeof(FLOAT);
                BLASLONG stride_y = inc_y * sizeof(FLOAT);
                for (size_t vl; n > 0; n -= vl, x += vl*inc_x, y += vl*inc_y) {
                    vl = VSETVL(n);
                    vx = VLSEV_FLOAT(x, stride_x, vl);
                    vy = VFMULVF_FLOAT(vx, alpha, vl);
                    VSSEV_FLOAT (y, stride_y, vy, vl);
                }
            }
        }

    } else {
        if ( alpha == 0.0 ) {
            if (1 == inc_y) {
                for (size_t vl; n > 0; n -= vl, y += vl) {
                    vl = VSETVL(n);
                    vy = VLEV_FLOAT(y, vl);
                    vy = VFMULVF_FLOAT(vy, beta, vl);
                    VSEV_FLOAT (y, vy, vl);
                }
            } else {
                BLASLONG stride_y = inc_y * sizeof(FLOAT);
                for (size_t vl; n > 0; n -= vl, y += vl*inc_y) {
                    vl = VSETVL(n);
                    vy = VLSEV_FLOAT(y, stride_y, vl);
                    vy = VFMULVF_FLOAT(vy, beta, vl);
                    VSSEV_FLOAT (y, stride_y, vy, vl);
                }
            }

        } else {
            if ((1 == inc_x) && (1 == inc_y)) {
                for (size_t vl; n > 0; n -= vl, x += vl, y += vl) {
                    vl = VSETVL(n);
                    vx = VLEV_FLOAT(x, vl);
                    vy = VLEV_FLOAT(y, vl);
                    vy = VFMULVF_FLOAT(vy, beta, vl);
                    vy = VFMACCVF_FLOAT(vy, alpha, vx, vl);
                    VSEV_FLOAT (y, vy, vl);
                }
            } else if (1 == inc_x) {
                BLASLONG stride_y = inc_y * sizeof(FLOAT);
                for (size_t vl; n > 0; n -= vl, x += vl, y += vl*inc_y) {
                    vl = VSETVL(n);
                    vx = VLEV_FLOAT(x, vl);
                    vy = VLSEV_FLOAT(y, stride_y, vl);
                    vy = VFMULVF_FLOAT(vy, beta, vl);
                    vy = VFMACCVF_FLOAT(vy, alpha, vx, vl);
                    VSSEV_FLOAT (y, stride_y, vy, vl);
                }
            } else if (1 == inc_y) {
                BLASLONG stride_x = inc_x * sizeof(FLOAT);
                for (size_t vl; n > 0; n -= vl, x += vl*inc_x, y += vl) {
                    vl = VSETVL(n);
                    vx = VLSEV_FLOAT(x, stride_x, vl);
                    vy = VLEV_FLOAT(y, vl);
                    vy = VFMULVF_FLOAT(vy, beta, vl);
                    vy = VFMACCVF_FLOAT(vy, alpha, vx, vl);
                    VSEV_FLOAT (y, vy, vl);
                }
            } else {
                BLASLONG stride_x = inc_x * sizeof(FLOAT);
                BLASLONG stride_y = inc_y * sizeof(FLOAT);
                for (size_t vl; n > 0; n -= vl, x += vl*inc_x, y += vl*inc_y) {
                    vl = VSETVL(n);
                    vx = VLSEV_FLOAT(x, stride_x, vl);
                    vy = VLSEV_FLOAT(y, stride_y, vl);
                    vy = VFMULVF_FLOAT(vy, beta, vl);
                    vy = VFMACCVF_FLOAT(vy, alpha, vx, vl);
                    VSSEV_FLOAT (y, stride_y, vy, vl);
                }
            }
        }
    }

    return(0);
}