target/s390x: implement MOVE ZONES

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170531220129.27724-14-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
index facac4b6d7..10754dd52d 100644
--- a/target/s390x/mem_helper.c
+++ b/target/s390x/mem_helper.c
@@ -287,6 +287,19 @@ void HELPER(mvo)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src)
     }
 }
 
+/* move zones  */
+void HELPER(mvz)(CPUS390XState *env, uint32_t l, uint64_t dest, uint64_t src)
+{
+    uintptr_t ra = GETPC();
+    int i;
+
+    for (i = 0; i <= l; i++) {
+        uint8_t b = cpu_ldub_data_ra(env, dest + i, ra) & 0x0f;
+        b |= cpu_ldub_data_ra(env, src + i, ra) & 0xf0;
+        cpu_stb_data_ra(env, dest + i, b, ra);
+    }
+}
+
 /* compare unsigned byte arrays */
 static uint32_t do_helper_clc(CPUS390XState *env, uint32_t l, uint64_t s1,
                               uint64_t s2, uintptr_t ra)