s390x/tcg: Implement VECTOR LOAD ELEMENT

Fairly easy, load with desired size and store it into the right element.
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Message-Id: <20190307121539.12842-10-david@redhat.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>

target/s390x/insn-data.def

@@ -986,6 +986,11 @@
     F(0xe756, VLR,     VRR_a, V,   0, 0, 0, 0, vlr, 0, IF_VEC)
 /* VECTOR LOAD AND REPLICATE */
     F(0xe705, VLREP,   VRX,   V,   la2, 0, 0, 0, vlrep, 0, IF_VEC)
+/* VECTOR LOAD ELEMENT */
+    E(0xe700, VLEB,    VRX,   V,   la2, 0, 0, 0, vle, 0, ES_8, IF_VEC)
+    E(0xe701, VLEH,    VRX,   V,   la2, 0, 0, 0, vle, 0, ES_16, IF_VEC)
+    E(0xe703, VLEF,    VRX,   V,   la2, 0, 0, 0, vle, 0, ES_32, IF_VEC)
+    E(0xe702, VLEG,    VRX,   V,   la2, 0, 0, 0, vle, 0, ES_64, IF_VEC)
 
 #ifndef CONFIG_USER_ONLY
 /* COMPARE AND SWAP AND PURGE */

target/s390x/translate_vx.inc.c

@@ -262,3 +262,21 @@ static DisasJumpType op_vlrep(DisasContext *s, DisasOps *o)
     tcg_temp_free_i64(tmp);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vle(DisasContext *s, DisasOps *o)
+{
+    const uint8_t es = s->insn->data;
+    const uint8_t enr = get_field(s->fields, m3);
+    TCGv_i64 tmp;
+
+    if (!valid_vec_element(enr, es)) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    tmp = tcg_temp_new_i64();
+    tcg_gen_qemu_ld_i64(tmp, o->addr1, get_mem_index(s), MO_TE | es);
+    write_vec_element_i64(tmp, get_field(s->fields, v1), enr, es);
+    tcg_temp_free_i64(tmp);
+    return DISAS_NEXT;
+}