Commit fe2be36d authored by David Hildenbrand's avatar David Hildenbrand
Browse files

s390x/tcg: Implement VECTOR SUM ACROSS DOUBLEWORD 



Perform the calculations without a helper. Only 16 bit or 32 bit values
have to be added.

Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
parent bc725e65

target/s390x/insn-data.def

+2 −0
Original line number Diff line number Diff line
@@ -1182,6 +1182,8 @@ 
    F(0xe7bf, VSBI,    VRR_d, V,   0, 0, 0, 0, vsbi, 0, IF_VEC)

/* VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION */

    F(0xe7bd, VSBCBI,  VRR_d, V,   0, 0, 0, 0, vsbcbi, 0, IF_VEC)

/* VECTOR SUM ACROSS DOUBLEWORD */

    F(0xe765, VSUMG,   VRR_c, V,   0, 0, 0, 0, vsumg, 0, IF_VEC)



#ifndef CONFIG_USER_ONLY

/* COMPARE AND SWAP AND PURGE */

target/s390x/translate_vx.inc.c

+29 −0
Original line number Diff line number Diff line
@@ -2252,3 +2252,32 @@ static DisasJumpType op_vsbcbi(DisasContext *s, DisasOps *o) 
                      get_field(s->fields, v4));

    return DISAS_NEXT;

}



static DisasJumpType op_vsumg(DisasContext *s, DisasOps *o)

{

    const uint8_t es = get_field(s->fields, m4);

    TCGv_i64 sum, tmp;

    uint8_t dst_idx;



    if (es == ES_8 || es > ES_32) {

        gen_program_exception(s, PGM_SPECIFICATION);

        return DISAS_NORETURN;

    }



    sum = tcg_temp_new_i64();

    tmp = tcg_temp_new_i64();

    for (dst_idx = 0; dst_idx < 2; dst_idx++) {

        uint8_t idx = dst_idx * NUM_VEC_ELEMENTS(es) / 2;

        const uint8_t max_idx = idx + NUM_VEC_ELEMENTS(es) / 2 - 1;



        read_vec_element_i64(sum, get_field(s->fields, v3), max_idx, es);

        for (; idx <= max_idx; idx++) {

            read_vec_element_i64(tmp, get_field(s->fields, v2), idx, es);

            tcg_gen_add_i64(sum, sum, tmp);

        }

        write_vec_element_i64(sum, get_field(s->fields, v1), dst_idx, ES_64);

    }

    tcg_temp_free_i64(sum);

    tcg_temp_free_i64(tmp);

    return DISAS_NEXT;

}