s390x/tcg: Implement VECTOR ADD WITH CARRY COMPUTE CARRY

Similar to VECTOR ADD COMPUTE CARRY, however 128-bit handling only.
Courtesy of Richard H.
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>

target/s390x/insn-data.def

@@ -1062,6 +1062,8 @@
     F(0xe7f1, VACC,    VRR_c, V,   0, 0, 0, 0, vacc, 0, IF_VEC)
 /* VECTOR ADD WITH CARRY */
     F(0xe7bb, VAC,     VRR_d, V,   0, 0, 0, 0, vac, 0, IF_VEC)
+/* VECTOR ADD WITH CARRY COMPUTE CARRY */
+    F(0xe7b9, VACCC,   VRR_d, V,   0, 0, 0, 0, vaccc, 0, IF_VEC)
 
 #ifndef CONFIG_USER_ONLY
 /* COMPARE AND SWAP AND PURGE */

target/s390x/translate_vx.inc.c

@@ -1146,3 +1146,35 @@ static DisasJumpType op_vac(DisasContext *s, DisasOps *o)
                       get_field(s->fields, v4));
     return DISAS_NEXT;
 }
+
+static void gen_accc2_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 tl = tcg_temp_new_i64();
+    TCGv_i64 th = tcg_temp_new_i64();
+    TCGv_i64 zero = tcg_const_i64(0);
+
+    tcg_gen_andi_i64(tl, cl, 1);
+    tcg_gen_add2_i64(tl, th, tl, zero, al, zero);
+    tcg_gen_add2_i64(tl, th, tl, th, bl, zero);
+    tcg_gen_add2_i64(tl, th, th, zero, ah, zero);
+    tcg_gen_add2_i64(tl, dl, tl, th, bh, zero);
+    tcg_gen_mov_i64(dh, zero);
+
+    tcg_temp_free_i64(tl);
+    tcg_temp_free_i64(th);
+    tcg_temp_free_i64(zero);
+}
+
+static DisasJumpType op_vaccc(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_accc2_i64, get_field(s->fields, v1),
+                      get_field(s->fields, v2), get_field(s->fields, v3),
+                      get_field(s->fields, v4));
+    return DISAS_NEXT;
+}