Add sharable clz/clo inline functions and use them for the mips target.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3455 c046a42c-6fe2-441c-8c8c-71466251a162

3 files changed, 33 insertions, 49 deletions

diff --git a/target-mips/exec.h b/target-mips/exec.h
index c6dc25cf6e..61c09acb66 100644
--- a/target-mips/exec.h
+++ b/target-mips/exec.h
@@ -70,6 +70,8 @@ void do_dsllv (void);
 void do_dsrav (void);
 void do_dsrlv (void);
 void do_drotrv (void);
+void do_dclo (void);
+void do_dclz (void);
 #endif
 #endif
 
diff --git a/target-mips/op.c b/target-mips/op.c
index 1ecec9a57a..9e8324d49b 100644
--- a/target-mips/op.c
+++ b/target-mips/op.c
@@ -22,6 +22,7 @@
 
 #include "config.h"
 #include "exec.h"
+#include "host-utils.h"
 
 #ifndef CALL_FROM_TB0
 #define CALL_FROM_TB0(func) func()
@@ -537,35 +538,13 @@ void op_rotrv (void)
 
 void op_clo (void)
 {
-    int n;
-
-    if (T0 == ~((target_ulong)0)) {
-        T0 = 32;
-    } else {
-        for (n = 0; n < 32; n++) {
-            if (!(((int32_t)T0) & (1 << 31)))
-                break;
-            T0 <<= 1;
-        }
-        T0 = n;
-    }
+    T0 = clo32(T0);
     RETURN();
 }
 
 void op_clz (void)
 {
-    int n;
-
-    if (T0 == 0) {
-        T0 = 32;
-    } else {
-        for (n = 0; n < 32; n++) {
-            if (T0 & (1 << 31))
-                break;
-            T0 <<= 1;
-        }
-        T0 = n;
-    }
+    T0 = clz32(T0);
     RETURN();
 }
 
@@ -645,6 +624,18 @@ void op_drotrv (void)
     RETURN();
 }
 
+void op_dclo (void)
+{
+    CALL_FROM_TB0(do_dclo);
+    RETURN();
+}
+
+void op_dclz (void)
+{
+    CALL_FROM_TB0(do_dclz);
+    RETURN();
+}
+
 #else /* TARGET_LONG_BITS > HOST_LONG_BITS */
 
 void op_dsll (void)
@@ -735,41 +726,19 @@ void op_drotrv (void)
        T0 = T1;
     RETURN();
 }
-#endif /* TARGET_LONG_BITS > HOST_LONG_BITS */
 
 void op_dclo (void)
 {
-    int n;
-
-    if (T0 == ~((target_ulong)0)) {
-        T0 = 64;
-    } else {
-        for (n = 0; n < 64; n++) {
-            if (!(T0 & (1ULL << 63)))
-                break;
-            T0 <<= 1;
-        }
-        T0 = n;
-    }
+    T0 = clo64(T0);
     RETURN();
 }
 
 void op_dclz (void)
 {
-    int n;
-
-    if (T0 == 0) {
-        T0 = 64;
-    } else {
-        for (n = 0; n < 64; n++) {
-            if (T0 & (1ULL << 63))
-                break;
-            T0 <<= 1;
-        }
-        T0 = n;
-    }
+    T0 = clz64(T0);
     RETURN();
 }
+#endif /* TARGET_LONG_BITS > HOST_LONG_BITS */
 #endif /* TARGET_MIPSN32 || TARGET_MIPS64 */
 
 /* 64 bits arithmetic */
diff --git a/target-mips/op_helper.c b/target-mips/op_helper.c
index f3e01202e6..ff26ab5afa 100644
--- a/target-mips/op_helper.c
+++ b/target-mips/op_helper.c
@@ -20,6 +20,8 @@
 #include <stdlib.h>
 #include "exec.h"
 
+#include "host-utils.h"
+
 #define GETPC() (__builtin_return_address(0))
 
 /*****************************************************************************/
@@ -141,6 +143,17 @@ void do_drotrv (void)
     } else
        T0 = T1;
 }
+
+void do_dclo (void)
+{
+    T0 = clo64(T0);
+}
+
+void do_dclz (void)
+{
+    T0 = clz64(T0);
+}
+
 #endif /* TARGET_LONG_BITS > HOST_LONG_BITS */
 #endif /* TARGET_MIPSN32 || TARGET_MIPS64 */