target/s390x: Use user_or_likely in access_memmove

Invert the conditional, indent the block, and use the macro
that expands to true for user-only.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/target/s390x/tcg/mem_helper.c b/target/s390x/tcg/mem_helper.c
index 5311a15a09746d6d809e3638ab0fed3e78ba0600..331a35b2e5bf4f5a0016a027be8c945ab0180532 100644 (file)
--- a/target/s390x/tcg/mem_helper.c
+++ b/target/s390x/tcg/mem_helper.c
@@ -296,41 +296,39 @@ static void access_memmove(CPUS390XState *env, S390Access *desta,
                            S390Access *srca, uintptr_t ra)
 {
     int len = desta->size1 + desta->size2;
-    int diff;
 
     assert(len == srca->size1 + srca->size2);
 
     /* Fallback to slow access in case we don't have access to all host pages */
-    if (unlikely(!desta->haddr1 || (desta->size2 && !desta->haddr2) ||
-                 !srca->haddr1 || (srca->size2 && !srca->haddr2))) {
-        int i;
-
-        for (i = 0; i < len; i++) {
-            uint8_t byte = access_get_byte(env, srca, i, ra);
-
-            access_set_byte(env, desta, i, byte, ra);
-        }
-        return;
-    }
-
-    diff = desta->size1 - srca->size1;
-    if (likely(diff == 0)) {
-        memmove(desta->haddr1, srca->haddr1, srca->size1);
-        if (unlikely(srca->size2)) {
-            memmove(desta->haddr2, srca->haddr2, srca->size2);
-        }
-    } else if (diff > 0) {
-        memmove(desta->haddr1, srca->haddr1, srca->size1);
-        memmove(desta->haddr1 + srca->size1, srca->haddr2, diff);
-        if (likely(desta->size2)) {
-            memmove(desta->haddr2, srca->haddr2 + diff, desta->size2);
+    if (user_or_likely(desta->haddr1 &&
+                       srca->haddr1 &&
+                       (!desta->size2 || desta->haddr2) &&
+                       (!srca->size2 || srca->haddr2))) {
+        int diff = desta->size1 - srca->size1;
+
+        if (likely(diff == 0)) {
+            memmove(desta->haddr1, srca->haddr1, srca->size1);
+            if (unlikely(srca->size2)) {
+                memmove(desta->haddr2, srca->haddr2, srca->size2);
+            }
+        } else if (diff > 0) {
+            memmove(desta->haddr1, srca->haddr1, srca->size1);
+            memmove(desta->haddr1 + srca->size1, srca->haddr2, diff);
+            if (likely(desta->size2)) {
+                memmove(desta->haddr2, srca->haddr2 + diff, desta->size2);
+            }
+        } else {
+            diff = -diff;
+            memmove(desta->haddr1, srca->haddr1, desta->size1);
+            memmove(desta->haddr2, srca->haddr1 + desta->size1, diff);
+            if (likely(srca->size2)) {
+                memmove(desta->haddr2 + diff, srca->haddr2, srca->size2);
+            }
         }
     } else {
-        diff = -diff;
-        memmove(desta->haddr1, srca->haddr1, desta->size1);
-        memmove(desta->haddr2, srca->haddr1 + desta->size1, diff);
-        if (likely(srca->size2)) {
-            memmove(desta->haddr2 + diff, srca->haddr2, srca->size2);
+        for (int i = 0; i < len; i++) {
+            uint8_t byte = access_get_byte(env, srca, i, ra);
+            access_set_byte(env, desta, i, byte, ra);
         }
     }
 }