[Qemu-devel] [PATCH v2 26/32] s390x/tcg: Implement VECTOR SIGN EXTEND TO DOUBLEWORD

[David Hildenbrand <david@redhat.com>]

Load both elements signed and store them into the two 64 bit elements.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/s390x/insn-data.def      |  2 ++
 target/s390x/translate_vx.inc.c | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index ae58ff440b..555250fd5a 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1032,6 +1032,8 @@
     E(0xe71a, VSCEG,   VRV,   V,   la2, 0, 0, 0, vsce, 0, ES_64, IF_VEC)
 /* VECTOR SELECT */
     F(0xe78d, VSEL,    VRR_e, V,   0, 0, 0, 0, vsel, 0, IF_VEC)
+/* VECTOR SIGN EXTEND TO DOUBLEWORD */
+    F(0xe75f, VSEG,    VRR_a, V,   0, 0, 0, 0, vseg, 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 c65e76b6f6..e808d2abb2 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -780,3 +780,36 @@ static DisasJumpType op_vsel(DisasContext *s, DisasOps *o)
                get_field(s->fields, v3), get_field(s->fields, v4), &gvec_op);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vseg(DisasContext *s, DisasOps *o)
+{
+    const uint8_t es = get_field(s->fields, m3);
+    int idx1, idx2;
+    TCGv_i64 tmp;
+
+    switch (es) {
+    case ES_8:
+        idx1 = 7;
+        idx2 = 15;
+        break;
+    case ES_16:
+        idx1 = 3;
+        idx2 = 7;
+        break;
+    case ES_32:
+        idx1 = 1;
+        idx2 = 3;
+        break;
+    default:
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    tmp = tcg_temp_new_i64();
+    read_vec_element_i64(tmp, get_field(s->fields, v2), idx1, es | MO_SIGN);
+    write_vec_element_i64(tmp, get_field(s->fields, v1), 0, ES_64);
+    read_vec_element_i64(tmp, get_field(s->fields, v2), idx2, es | MO_SIGN);
+    write_vec_element_i64(tmp, get_field(s->fields, v1), 1, ES_64);
+    tcg_temp_free_i64(tmp);
+    return DISAS_NEXT;
+}
-- 
2.17.2