s390x/tcg: Implement VECTOR SUM ACROSS QUADWORD

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>

1 files changed, 32 insertions, 0 deletions

diff --git a/target/s390x/translate_vx.inc.c b/target/s390x/translate_vx.inc.c
index 7b4efee5c0..16bfbfce57 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;
+}