[Qemu-devel] [PATCH v2 28/32] s390x/tcg: Implement VECTOR STORE

[David Hildenbrand <david@redhat.com>]

Properly probe the whole access first.

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 | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index 555250fd5a..4525d5b145 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1034,6 +1034,8 @@
     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)
+/* VECTOR STORE */
+    F(0xe70e, VST,     VRX,   V,   la2, 0, 0, 0, vst, 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 e808d2abb2..a08a24b537 100644
--- a/target/s390x/translate_vx.inc.c
+++ b/target/s390x/translate_vx.inc.c
@@ -113,6 +113,7 @@ static void write_vec_element_i64(TCGv_i64 src, int reg, uint8_t enr,
     }
 }
 
+
 static void get_vec_element_ptr_i64(TCGv_ptr ptr, uint8_t reg, TCGv_i64 enr,
                                     uint8_t es)
 {
@@ -813,3 +814,19 @@ static DisasJumpType op_vseg(DisasContext *s, DisasOps *o)
     tcg_temp_free_i64(tmp);
     return DISAS_NEXT;
 }
+
+static DisasJumpType op_vst(DisasContext *s, DisasOps *o)
+{
+    TCGv_i64 tmp = tcg_const_i64(16);
+
+    /* Probe write access before actually modifying memory */
+    gen_helper_probe_write_access(cpu_env, o->addr1, tmp);
+
+    read_vec_element_i64(tmp,  get_field(s->fields, v1), 0, ES_64);
+    tcg_gen_qemu_st_i64(tmp, o->addr1, get_mem_index(s), MO_TEQ);
+    gen_addi_and_wrap_i64(s, o->addr1, o->addr1, 8);
+    read_vec_element_i64(tmp,  get_field(s->fields, v1), 1, ES_64);
+    tcg_gen_qemu_st_i64(tmp, o->addr1, get_mem_index(s), MO_TEQ);
+    tcg_temp_free_i64(tmp);
+    return DISAS_NEXT;
+}
-- 
2.17.2