[Qemu-devel] [PATCH v1 31/33] s390x/tcg: Implement VECTOR STORE MULTIPLE

[David Hildenbrand <david@redhat.com>]

Similar to VECTOR LOAD MULTIPLE, just the opposite direction.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/s390x/insn-data.def      |  2 ++
 target/s390x/translate_vx.inc.c | 25 +++++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index bf9786120b..60e4895f60 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1042,6 +1042,8 @@
     E(0xe709, VSTEH,   VRX,   V,   la2, 0, 0, 0, vste, 0, MO_16, IF_VEC)
     E(0xe70b, VSTEF,   VRX,   V,   la2, 0, 0, 0, vste, 0, MO_32, IF_VEC)
     E(0xe70a, VSTEG,   VRX,   V,   la2, 0, 0, 0, vste, 0, MO_64, IF_VEC)
+/* VECTOR STORE MULTIPLE */
+    F(0xe73e, VSTM,    VRS_a, V,   la2, 0, 0, 0, vstm, 0, IF_VEC)
 
 #ifndef CONFIG_USER_ONLY
 /* COMPARE AND SWAP AND PURGE */
diff --git a/target/s390x/translate_vx.inc.c b/target/s390x/translate_vx.inc.c
index 9ec135d1a9..7e7c96c974 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -804,3 +804,28 @@ static DisasJumpType op_vste(DisasContext *s, DisasOps *o)
     tcg_temp_free_i64(tmp);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vstm(DisasContext *s, DisasOps *o)
+{
+    const uint8_t v3 = get_field(s->fields, v3);
+    uint8_t v1 = get_field(s->fields, v1);
+
+    while (v3 < v1 || (v3 - v1 + 1) > 16) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    /*
+     * FIXME: On exceptions we must not modify any memory.
+     */
+    for (;; v1++) {
+        store_vec_element(s, v1, 0, o->addr1, MO_64);
+        gen_addi_and_wrap_i64(s, o->addr1, o->addr1, 8);
+        store_vec_element(s, v1, 1, o->addr1, MO_64);
+        if (v1 == v3) {
+            break;
+        }
+        gen_addi_and_wrap_i64(s, o->addr1, o->addr1, 8);
+    }
+    return DISAS_NEXT;
+}
-- 
2.17.2