[Qemu-devel] [PULL 43/54] s390x/tcg: Implement VECTOR SUM ACROSS QUADWORD

[Cornelia Huck <cohuck@redhat.com>]

From: David Hildenbrand <david@redhat.com>

Similar to VECTOR SUM ACROSS DOUBLEWORD, however without a loop and
using 128-bit calculations.

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 | 32 ++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index dd370030824e..2483ee01d7fe 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1184,6 +1184,8 @@
     F(0xe7bd, VSBCBI,  VRR_d, V,   0, 0, 0, 0, vsbcbi, 0, IF_VEC)
 /* VECTOR SUM ACROSS DOUBLEWORD */
     F(0xe765, VSUMG,   VRR_c, V,   0, 0, 0, 0, vsumg, 0, IF_VEC)
+/* VECTOR SUM ACROSS QUADWORD */
+    F(0xe767, VSUMQ,   VRR_c, V,   0, 0, 0, 0, vsumq, 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 7b4efee5c0a2..16bfbfce5738 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -2281,3 +2281,35 @@ static DisasJumpType op_vsumg(DisasContext *s, DisasOps *o)
     tcg_temp_free_i64(tmp);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vsumq(DisasContext *s, DisasOps *o)
+{
+    const uint8_t es = get_field(s->fields, m4);
+    const uint8_t max_idx = NUM_VEC_ELEMENTS(es) - 1;
+    TCGv_i64 sumh, suml, zero, tmpl;
+    uint8_t idx;
+
+    if (es < ES_32 || es > ES_64) {
+        gen_program_exception(s, PGM_SPECIFICATION);
+        return DISAS_NORETURN;
+    }
+
+    sumh = tcg_const_i64(0);
+    suml = tcg_temp_new_i64();
+    zero = tcg_const_i64(0);
+    tmpl = tcg_temp_new_i64();
+
+    read_vec_element_i64(suml, get_field(s->fields, v3), max_idx, es);
+    for (idx = 0; idx <= max_idx; idx++) {
+        read_vec_element_i64(tmpl, get_field(s->fields, v2), idx, es);
+        tcg_gen_add2_i64(suml, sumh, suml, sumh, tmpl, zero);
+    }
+    write_vec_element_i64(sumh, get_field(s->fields, v1), 0, ES_64);
+    write_vec_element_i64(suml, get_field(s->fields, v1), 1, ES_64);
+
+    tcg_temp_free_i64(sumh);
+    tcg_temp_free_i64(suml);
+    tcg_temp_free_i64(zero);
+    tcg_temp_free_i64(tmpl);
+    return DISAS_NEXT;
+}
-- 
2.20.1