Commit bc725e65 authored by David Hildenbrand's avatar David Hildenbrand
Browse files

s390x/tcg: Implement VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION 



Mostly courtesy of Richard H.

Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: default avatarDavid Hildenbrand <david@redhat.com>
parent 48390a7c

target/s390x/insn-data.def

+2 −0
Original line number Diff line number Diff line
@@ -1180,6 +1180,8 @@ 
    F(0xe7f5, VSCBI,   VRR_c, V,   0, 0, 0, 0, vscbi, 0, IF_VEC)

/* VECTOR SUBTRACT WITH BORROW INDICATION */

    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)



#ifndef CONFIG_USER_ONLY

/* COMPARE AND SWAP AND PURGE */

target/s390x/translate_vx.inc.c

+34 −0
Original line number Diff line number Diff line
@@ -2218,3 +2218,37 @@ static DisasJumpType op_vsbi(DisasContext *s, DisasOps *o) 
                      get_field(s->fields, v4));

    return DISAS_NEXT;

}



static void gen_sbcbi2_i64(TCGv_i64 dl, TCGv_i64 dh, TCGv_i64 al, TCGv_i64 ah,

                           TCGv_i64 bl, TCGv_i64 bh, TCGv_i64 cl, TCGv_i64 ch)

{

    TCGv_i64 th = tcg_temp_new_i64();

    TCGv_i64 tl = tcg_temp_new_i64();

    TCGv_i64 zero = tcg_const_i64(0);



    tcg_gen_andi_i64(tl, cl, 1);

    tcg_gen_sub2_i64(tl, th, al, zero, tl, zero);

    tcg_gen_sub2_i64(tl, th, tl, th, bl, zero);

    tcg_gen_andi_i64(th, th, 1);

    tcg_gen_sub2_i64(tl, th, ah, zero, th, zero);

    tcg_gen_sub2_i64(tl, th, tl, th, bh, zero);

    tcg_gen_andi_i64(dl, th, 1);

    tcg_gen_mov_i64(dh, zero);



    tcg_temp_free_i64(tl);

    tcg_temp_free_i64(th);

    tcg_temp_free_i64(zero);

}



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

{

    if (get_field(s->fields, m5) != ES_128) {

        gen_program_exception(s, PGM_SPECIFICATION);

        return DISAS_NORETURN;

    }



    gen_gvec128_4_i64(gen_sbcbi2_i64, get_field(s->fields, v1),

                      get_field(s->fields, v2), get_field(s->fields, v3),

                      get_field(s->fields, v4));

    return DISAS_NEXT;

}