diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c
index f32ecd6..0c95035 100644
--- a/target-arm/neon_helper.c
+++ b/target-arm/neon_helper.c
@@ -392,7 +392,7 @@ NEON_VOP(abd_u32, neon_u32, 1)
  #define NEON_FN(dest, src1, src2) do { \
      int8_t tmp; \
      tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8 || tmp <= -sizeof(src1) * 8) { \
+    if (abs(tmp) >= sizeof(src1) * 8) { \
          dest = 0; \
      } else if (tmp < 0) { \
          dest = src1 >> -tmp; \
@@ -420,7 +420,7 @@ uint64_t HELPER(neon_shl_u64)(uint64_t val,  
uint64_t shiftop)
  #define NEON_FN(dest, src1, src2) do { \
      int8_t tmp; \
      tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8) { \
+    if (tmp >= 0 && tmp >= sizeof(src1) * 8) { \
          dest = 0; \
      } else if (tmp <= -sizeof(src1) * 8) { \