target-i386: Implement BLSR, BLSMSK, BLSI

Do all of group 17 at one time for ease.

Signed-off-by: Richard Henderson <rth@twiddle.net>
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 1fa9dc8..960676b 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -636,6 +636,11 @@
     CC_OP_SARL,
     CC_OP_SARQ,
 
+    CC_OP_BMILGB, /* Z,S via CC_DST, C = SRC==0; O=0; P,A undefined */
+    CC_OP_BMILGW,
+    CC_OP_BMILGL,
+    CC_OP_BMILGQ,
+
     CC_OP_NB,
 } CCOp;