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[qemu-s390x] [PATCH v1 28/33] s390x/tcg: Implement VECTOR SIGN EXTEND TO


From: David Hildenbrand
Subject: [qemu-s390x] [PATCH v1 28/33] s390x/tcg: Implement VECTOR SIGN EXTEND TO DOUBLEWORD
Date: Tue, 26 Feb 2019 12:39:10 +0100

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

Signed-off-by: David Hildenbrand <address@hidden>
---
 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 a8d43b588c..ab3309c54b 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1033,6 +1033,8 @@
     E(0xe71a, VSCEG,   VRV,   V,   la2, 0, 0, 0, vsce, 0, MO_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 d3463c9ef3..23cdae0970 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -731,3 +731,36 @@ 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 MO_8:
+        idx1 = 7;
+        idx2 = 15;
+        break;
+    case MO_16:
+        idx1 = 3;
+        idx2 = 7;
+        break;
+    case MO_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, MO_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, MO_64);
+    tcg_temp_free_i64(tmp);
+    return DISAS_NEXT;
+}
-- 
2.17.2




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