4 files changed, 12 insertions, 9 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c
index df09778ea8..236aaed23b 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -340,6 +340,14 @@ uint32_t HELPER(uxtb16)(uint32_t x)
     return res;
 }
 
+uint32_t HELPER(clz)(uint32_t x)
+{
+    int count;
+    for (count = 32; x; count--)
+        x >>= 1;
+    return count;
+}
+
 #if defined(CONFIG_USER_ONLY)
 
 void do_interrupt (CPUState *env)
diff --git a/target-arm/helpers.h b/target-arm/helpers.h
index 577f5ee402..8f2e129162 100644
--- a/target-arm/helpers.h
+++ b/target-arm/helpers.h
@@ -2,5 +2,6 @@
 #define DEF_HELPER(name, ret, args) ret helper_##name args;
 #endif
 
+DEF_HELPER(clz, uint32_t, (uint32_t))
 DEF_HELPER(sxtb16, uint32_t, (uint32_t))
 DEF_HELPER(uxtb16, uint32_t, (uint32_t))
diff --git a/target-arm/op.c b/target-arm/op.c
index 9a01675270..bf535c8db0 100644
--- a/target-arm/op.c
+++ b/target-arm/op.c
@@ -475,15 +475,6 @@ void OPPROTO op_rorl_T1_T0_cc(void)
 }
 
 /* misc */
-void OPPROTO op_clz_T0(void)
-{
-    int count;
-    for (count = 32; T0 > 0; count--)
-        T0 = T0 >> 1;
-    T0 = count;
-    FORCE_RET();
-}
-
 #define SIGNBIT (uint32_t)0x80000000
 /* saturating arithmetic  */
 void OPPROTO op_addl_T0_T1_setq(void)
diff --git a/target-arm/translate.c b/target-arm/translate.c
index ef529eb161..8669e9422c 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -205,6 +205,9 @@ static void store_reg(DisasContext *s, int reg, TCGv var)
 #define gen_sxtb16(var) tcg_gen_helper_1_1(HELPER_ADDR(sxtb16), var, var)
 #define gen_uxtb16(var) tcg_gen_helper_1_1(HELPER_ADDR(uxtb16), var, var)
 
+#define gen_op_clz_T0(var) \
+    tcg_gen_helper_1_1(HELPER_ADDR(clz), cpu_T[0], cpu_T[0])
+
 /* Dual 16-bit add.  Result placed in t0 and t1 is marked as dead.
     tmp = (t0 ^ t1) & 0x8000;
     t0 &= ~0x8000;