s390x/tcg: Implement VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION
Mostly courtesy of Richard H. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: David Hildenbrand <david@redhat.com>
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@ -1180,6 +1180,8 @@
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F(0xe7f5, VSCBI, VRR_c, V, 0, 0, 0, 0, vscbi, 0, IF_VEC)
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/* VECTOR SUBTRACT WITH BORROW INDICATION */
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F(0xe7bf, VSBI, VRR_d, V, 0, 0, 0, 0, vsbi, 0, IF_VEC)
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/* VECTOR SUBTRACT WITH BORROW COMPUTE BORROW INDICATION */
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F(0xe7bd, VSBCBI, VRR_d, V, 0, 0, 0, 0, vsbcbi, 0, IF_VEC)
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#ifndef CONFIG_USER_ONLY
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/* COMPARE AND SWAP AND PURGE */
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@ -2218,3 +2218,37 @@ static DisasJumpType op_vsbi(DisasContext *s, DisasOps *o)
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get_field(s->fields, v4));
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return DISAS_NEXT;
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}
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static void gen_sbcbi2_i64(TCGv_i64 dl, TCGv_i64 dh, TCGv_i64 al, TCGv_i64 ah,
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TCGv_i64 bl, TCGv_i64 bh, TCGv_i64 cl, TCGv_i64 ch)
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{
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TCGv_i64 th = tcg_temp_new_i64();
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TCGv_i64 tl = tcg_temp_new_i64();
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TCGv_i64 zero = tcg_const_i64(0);
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tcg_gen_andi_i64(tl, cl, 1);
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tcg_gen_sub2_i64(tl, th, al, zero, tl, zero);
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tcg_gen_sub2_i64(tl, th, tl, th, bl, zero);
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tcg_gen_andi_i64(th, th, 1);
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tcg_gen_sub2_i64(tl, th, ah, zero, th, zero);
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tcg_gen_sub2_i64(tl, th, tl, th, bh, zero);
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tcg_gen_andi_i64(dl, th, 1);
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tcg_gen_mov_i64(dh, zero);
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tcg_temp_free_i64(tl);
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tcg_temp_free_i64(th);
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tcg_temp_free_i64(zero);
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}
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static DisasJumpType op_vsbcbi(DisasContext *s, DisasOps *o)
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{
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if (get_field(s->fields, m5) != ES_128) {
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gen_program_exception(s, PGM_SPECIFICATION);
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return DISAS_NORETURN;
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}
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gen_gvec128_4_i64(gen_sbcbi2_i64, get_field(s->fields, v1),
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get_field(s->fields, v2), get_field(s->fields, v3),
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get_field(s->fields, v4));
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return DISAS_NEXT;
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}
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