Function sz_fill_sve

include/stringzilla/memory.h:1219–1247

#endif

SZ_PUBLIC void sz_fill_sve(sz_ptr_t target, sz_size_t length, sz_u8_t value) {
    svuint8_t value_vec = svdup_u8(value);
    sz_size_t vec_len = svcntb(); // Vector length in bytes (scalable)

    if (length <= vec_len) {
        // Small buffer case: use mask to handle small writes
        svbool_t mask = svwhilelt_b8((sz_u64_t)0ull, (sz_u64_t)length);
        svst1_u8(mask, (sz_u8_t *)target, value_vec);
    }
    else {
        // Calculate head, body, and tail sizes
        sz_size_t head_length = vec_len - ((sz_size_t)target % vec_len);
        sz_size_t tail_length = (sz_size_t)(target + length) % vec_len;
        sz_size_t body_length = length - head_length - tail_length;

        // Handle unaligned head
        svbool_t head_mask = svwhilelt_b8((sz_u64_t)0ull, (sz_u64_t)head_length);
        svst1_u8(head_mask, (sz_u8_t *)target, value_vec);
        target += head_length;

        // Aligned body loop
        for (; body_length >= vec_len; target += vec_len, body_length -= vec_len)
            svst1_u8(svptrue_b8(), (sz_u8_t *)target, value_vec);

        // Handle unaligned tail
        svbool_t tail_mask = svwhilelt_b8((sz_u64_t)0ull, (sz_u64_t)tail_length);
        svst1_u8(tail_mask, (sz_u8_t *)target, value_vec);
    }
}

SZ_PUBLIC void sz_copy_sve(sz_ptr_t target, sz_cptr_t source, sz_size_t length) {
    sz_size_t vec_len = svcntb(); // Vector length in bytes