arm.md (tlobits_cbranch): New pattern.

	* arm.md (tlobits_cbranch): New pattern.
	* arm.h (arm_select_cc_mode): For thumb, only return CC_Nmode if
	testing a single bit.

From-SVN: r110803

gcc/ChangeLog

+2006-02-09  Richard Earnshaw  <richard.earnshaw@arm.com>
+
+	* arm.md (tlobits_cbranch): New pattern.
+	* arm.h (arm_select_cc_mode): For thumb, only return CC_Nmode if
+	testing a single bit.
+
 2006-02-09  Andrew Pinski  <pinskia@physics.uc.edu>
 
 	PR tree-opt/26179

gcc/config/arm/arm.c

@@ -6748,7 +6748,8 @@ arm_select_cc_mode (enum rtx_code op, rtx x, rtx y)
   if (TARGET_THUMB
       && GET_MODE (x) == SImode
       && (op == EQ || op == NE)
-      && (GET_CODE (x) == ZERO_EXTRACT))
+      && GET_CODE (x) == ZERO_EXTRACT
+      && XEXP (x, 1) == const1_rtx)
     return CC_Nmode;
 
   /* An operation that sets the condition codes as a side-effect, the

gcc/config/arm/arm.md

@@ -6028,6 +6028,50 @@
 		(const_int 8))))]
 )
   
+(define_insn "*tlobits_cbranch"
+  [(set (pc)
+	(if_then_else
+	 (match_operator 0 "equality_operator"
+	  [(zero_extract:SI (match_operand:SI 1 "s_register_operand" "l")
+			    (match_operand:SI 2 "const_int_operand" "i")
+			    (const_int 0))
+	   (const_int 0)])
+	 (label_ref (match_operand 3 "" ""))
+	 (pc)))
+   (clobber (match_scratch:SI 4 "=l"))]
+  "TARGET_THUMB"
+  "*
+  {
+  rtx op[3];
+  op[0] = operands[4];
+  op[1] = operands[1];
+  op[2] = GEN_INT (32 - INTVAL (operands[2]));
+
+  output_asm_insn (\"lsl\\t%0, %1, %2\", op);
+  switch (get_attr_length (insn))
+    {
+    case 4:  return \"b%d0\\t%l3\";
+    case 6:  return \"b%D0\\t.LCB%=\;b\\t%l3\\t%@long jump\\n.LCB%=:\";
+    default: return \"b%D0\\t.LCB%=\;bl\\t%l3\\t%@far jump\\n.LCB%=:\";
+    }
+  }"
+  [(set (attr "far_jump")
+        (if_then_else
+	    (eq_attr "length" "8")
+	    (const_string "yes")
+            (const_string "no")))
+   (set (attr "length") 
+        (if_then_else
+	    (and (ge (minus (match_dup 3) (pc)) (const_int -250))
+	         (le (minus (match_dup 3) (pc)) (const_int 256)))
+	    (const_int 4)
+	    (if_then_else
+	        (and (ge (minus (match_dup 3) (pc)) (const_int -2040))
+		     (le (minus (match_dup 3) (pc)) (const_int 2048)))
+		(const_int 6)
+		(const_int 8))))]
+)
+  
 (define_insn "*tstsi3_cbranch"
   [(set (pc)
 	(if_then_else