OpenBLAS/kernel/arm64/zgemm_ncopy_sve_v1.c

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

// TODO: write in assembly with proper unrolling of inner loop
int CNAME(BLASLONG m, BLASLONG n, IFLOAT *a, BLASLONG lda, IFLOAT *b){

    BLASLONG j;
    IFLOAT *aoffset, *aoffset1, *boffset;

    svint64_t lda_vec = svindex_s64(0LL, lda * 2);

    aoffset = a;
    boffset = b;

    j = 0;
    svbool_t pg = svwhilelt_b64((uint64_t)j, (uint64_t)n);
    uint64_t active = svcntp_b64(svptrue_b64(), pg);
    do {

        aoffset1 = aoffset;

        uint64_t i_cnt = m;
        while (i_cnt--) {
            svfloat64_t a_vec_real = svld1_gather_index(pg, (double *) aoffset1, lda_vec);
            svfloat64_t a_vec_imag = svld1_gather_index(pg, ((double *) aoffset1) + 1, lda_vec);
            svst2_f64(pg, (double *) boffset, svcreate2(a_vec_real, a_vec_imag));
            aoffset1 += 2;
            boffset += active * 2;
        }
        aoffset += active * lda * 2;

        j += svcntd();
        pg = svwhilelt_b64((uint64_t)j, (uint64_t)n);
        active = svcntp_b64(svptrue_b64(), pg);


    } while (svptest_any(svptrue_b64(), pg));

    return 0;
}