s390x/tcg: Implement VECTOR LOAD ELEMENT IMMEDIATE

Take care of properly sign-extending the immediate.
Reviewed-by: NRichard Henderson <richard.henderson@linaro.org>
Signed-off-by: NDavid Hildenbrand <david@redhat.com>
Message-Id: <20190307121539.12842-11-david@redhat.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>

target/s390x/insn-data.def

@@ -991,6 +991,11 @@
     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)
+/* VECTOR LOAD ELEMENT IMMEDIATE */
+    E(0xe740, VLEIB,   VRI_a, V,   0, 0, 0, 0, vlei, 0, ES_8, IF_VEC)
+    E(0xe741, VLEIH,   VRI_a, V,   0, 0, 0, 0, vlei, 0, ES_16, IF_VEC)
+    E(0xe743, VLEIF,   VRI_a, V,   0, 0, 0, 0, vlei, 0, ES_32, IF_VEC)
+    E(0xe742, VLEIG,   VRI_a, V,   0, 0, 0, 0, vlei, 0, ES_64, IF_VEC)
 
 #ifndef CONFIG_USER_ONLY
 /* COMPARE AND SWAP AND PURGE */

target/s390x/translate_vx.inc.c

@@ -280,3 +280,20 @@ static DisasJumpType op_vle(DisasContext *s, DisasOps *o)
     tcg_temp_free_i64(tmp);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vlei(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_const_i64((int16_t)get_field(s->fields, i2));
+    write_vec_element_i64(tmp, get_field(s->fields, v1), enr, es);
+    tcg_temp_free_i64(tmp);
+    return DISAS_NEXT;
+}