s390x/tcg: Implement VECTOR STORE WITH LENGTH

Very similar to VECTOR LOAD WITH LENGTH, just the opposite direction.
Properly probe write access before modifying memory.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20190307121539.12842-32-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/target/s390x/vec_helper.c b/target/s390x/vec_helper.c
index 021695b38c..bb4c9304f0 100644
--- a/target/s390x/vec_helper.c
+++ b/target/s390x/vec_helper.c
@@ -167,3 +167,27 @@ void HELPER(gvec_vperm)(void *v1, const void *v2, const void *v3,
     }
     *(S390Vector *)v1 = tmp;
 }
+
+void HELPER(vstl)(CPUS390XState *env, const void *v1, uint64_t addr,
+                  uint64_t bytes)
+{
+    /* Probe write access before actually modifying memory */
+    probe_write_access(env, addr, bytes, GETPC());
+
+    if (likely(bytes >= 16)) {
+        cpu_stq_data_ra(env, addr, s390_vec_read_element64(v1, 0), GETPC());
+        addr = wrap_address(env, addr + 8);
+        cpu_stq_data_ra(env, addr, s390_vec_read_element64(v1, 1), GETPC());
+    } else {
+        S390Vector tmp = {};
+        int i;
+
+        for (i = 0; i < bytes; i++) {
+            uint8_t byte = s390_vec_read_element8(v1, i);
+
+            cpu_stb_data_ra(env, addr, byte, GETPC());
+            addr = wrap_address(env, addr + 1);
+        }
+        *(S390Vector *)v1 = tmp;
+    }
+}