* i386.md (ffssi, ffshi): Rewrite as define_expands.

[pf3gnuchains/gcc-fork.git] / gcc / config / i386 / i386.c

diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 9f565ae..1232b4a 100644 (file)
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -3646,6 +3646,18 @@ notice_update_cc (exp)
            cc_status.value2 = SET_DEST (exp);
            break;
 
+           /* This is the bsf pattern used by ffs.  */
+         case UNSPEC:
+           if (XINT (SET_SRC (exp), 1) == 5)
+             {
+               /* Only the Z flag is defined after bsf.  */
+               cc_status.flags
+                 = CC_NOT_POSITIVE | CC_NOT_NEGATIVE | CC_NO_OVERFLOW;
+               cc_status.value1 = XVECEXP (SET_SRC (exp), 0, 0);
+               break;
+             }
+           /* FALLTHRU */
+
          default:
            CC_STATUS_INIT;
          }