OpenBLAS/kernel/riscv64/zaxpy_rvv.c

/***************************************************************************
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its contributors may be used to endorse or promote products
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*****************************************************************************/

#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n)               __riscv_vsetvl_e32m4(n)
#define FLOAT_V_T               vfloat32m4_t
#define FLOAT_VX2_T             vfloat32m4x2_t
#define VGET_VX2                __riscv_vget_v_f32m4x2_f32m4
#define VSET_VX2                __riscv_vset_v_f32m4_f32m4x2
#define VLSEG_FLOAT             __riscv_vlseg2e32_v_f32m4x2
#define VLSSEG_FLOAT            __riscv_vlsseg2e32_v_f32m4x2
#define VSSEG_FLOAT             __riscv_vsseg2e32_v_f32m4x2
#define VSSSEG_FLOAT            __riscv_vssseg2e32_v_f32m4x2
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f32m4
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f32m4
#else
#define VSETVL(n)               __riscv_vsetvl_e64m4(n)
#define FLOAT_V_T               vfloat64m4_t
#define FLOAT_VX2_T             vfloat64m4x2_t
#define VGET_VX2                __riscv_vget_v_f64m4x2_f64m4
#define VSET_VX2                __riscv_vset_v_f64m4_f64m4x2
#define VLSEG_FLOAT             __riscv_vlseg2e64_v_f64m4x2
#define VLSSEG_FLOAT            __riscv_vlsseg2e64_v_f64m4x2
#define VSSEG_FLOAT             __riscv_vsseg2e64_v_f64m4x2
#define VSSSEG_FLOAT            __riscv_vssseg2e64_v_f64m4x2
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f64m4
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f64m4
#endif

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(n < 0) return(0);
    if(da_r == 0.0 && da_i == 0.0) return(0);
 
    FLOAT_V_T vx0, vx1, vy0, vy1;
    FLOAT_VX2_T vxx2, vyx2;

    if(inc_x == 1 && inc_y == 1) {

        for (size_t vl; n > 0; n -= vl, x += vl*2, y += vl*2) {
            vl = VSETVL(n);

            vxx2 = VLSEG_FLOAT(x, vl);
            vyx2 = VLSEG_FLOAT(y, vl);

            vx0 = VGET_VX2(vxx2, 0);
            vx1 = VGET_VX2(vxx2, 1);
            vy0 = VGET_VX2(vyx2, 0);
            vy1 = VGET_VX2(vyx2, 1);

        #if !defined(CONJ)
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFNMSACVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #else
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFMACCVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFNMSACVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #endif
            vyx2 = VSET_VX2(vyx2, 0, vy0);
            vyx2 = VSET_VX2(vyx2, 1, vy1);
            VSSEG_FLOAT(y, vyx2, vl);
        }

    } else if (inc_x == 1) {

        BLASLONG stride_y = inc_y * 2 * sizeof(FLOAT);

        for (size_t vl; n > 0; n -= vl, x += vl*2, y += vl*inc_y*2) {
            vl = VSETVL(n);

            vxx2 = VLSEG_FLOAT(x, vl);
            vyx2 = VLSSEG_FLOAT(y, stride_y, vl);

            vx0 = VGET_VX2(vxx2, 0);
            vx1 = VGET_VX2(vxx2, 1);
            vy0 = VGET_VX2(vyx2, 0);
            vy1 = VGET_VX2(vyx2, 1);

        #if !defined(CONJ)
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFNMSACVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #else
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFMACCVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFNMSACVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #endif
            vyx2 = VSET_VX2(vyx2, 0, vy0);
            vyx2 = VSET_VX2(vyx2, 1, vy1);
            VSSSEG_FLOAT(y, stride_y, vyx2, vl);
        }

    } else if (inc_y == 1) {

        BLASLONG stride_x = inc_x * 2 * sizeof(FLOAT);

        for (size_t vl; n > 0; n -= vl, x += vl*inc_x*2, y += vl*2) {
            vl = VSETVL(n);

            vxx2 = VLSSEG_FLOAT(x, stride_x, vl);
            vyx2 = VLSEG_FLOAT(y, vl);

            vx0 = VGET_VX2(vxx2, 0);
            vx1 = VGET_VX2(vxx2, 1);
            vy0 = VGET_VX2(vyx2, 0);
            vy1 = VGET_VX2(vyx2, 1);

        #if !defined(CONJ)
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFNMSACVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #else
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFMACCVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFNMSACVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #endif
            vyx2 = VSET_VX2(vyx2, 0, vy0);
            vyx2 = VSET_VX2(vyx2, 1, vy1);
            VSSEG_FLOAT(y, vyx2, vl);
        }

    } else {

        BLASLONG stride_x = inc_x * 2 * sizeof(FLOAT);
        BLASLONG stride_y = inc_y * 2 * sizeof(FLOAT);

        for (size_t vl; n > 0; n -= vl, x += vl*inc_x*2, y += vl*inc_y*2) {
            vl = VSETVL(n);

            vxx2 = VLSSEG_FLOAT(x, stride_x, vl);
            vyx2 = VLSSEG_FLOAT(y, stride_y, vl);

            vx0 = VGET_VX2(vxx2, 0);
            vx1 = VGET_VX2(vxx2, 1);
            vy0 = VGET_VX2(vyx2, 0);
            vy1 = VGET_VX2(vyx2, 1);

        #if !defined(CONJ)
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFNMSACVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #else
            vy0 = VFMACCVF_FLOAT(vy0, da_r, vx0, vl);
            vy0 = VFMACCVF_FLOAT(vy0, da_i, vx1, vl);
            vy1 = VFNMSACVF_FLOAT(vy1, da_r, vx1, vl);
            vy1 = VFMACCVF_FLOAT(vy1, da_i, vx0, vl);
        #endif
            vyx2 = VSET_VX2(vyx2, 0, vy0);
            vyx2 = VSET_VX2(vyx2, 1, vy1);
            VSSSEG_FLOAT(y, stride_y, vyx2, vl);
        }

    }

    return(0);
}