[AARCH64]Fix CLZ_DEFINED_AT_ZERO and CTZ_DEFINED_AT_ZERO definition.

gcc/

2014-12-15  Renlin Li  <renlin.li@arm.com>

	* config/aarch64/aarch64.h (CLZ_DEFINED_VALUE_AT_ZERO): Return 2.
	(CTZ_DEFINED_VALUE_AT_ZERO): Update to support more modes.

From-SVN: r218737

gcc/ChangeLog

+2014-12-15  Renlin Li  <renlin.li@arm.com>
+
+	* config/aarch64/aarch64.h (CLZ_DEFINED_VALUE_AT_ZERO): Return 2.
+	(CTZ_DEFINED_VALUE_AT_ZERO): Update to support more modes.
+
 2014-12-15  Jakub Jelinek  <jakub@redhat.com>
 
 	PR sanitizer/64265

gcc/config/aarch64/aarch64.h

@@ -804,9 +804,9 @@ do {									     \
    : reverse_condition (CODE))
 
 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
-  ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE))
+  ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE), 2)
 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
-  ((VALUE) = ((MODE) == SImode ? 32 : 64), 2)
+  ((VALUE) = GET_MODE_UNIT_BITSIZE (MODE), 2)
 
 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LR_REGNUM)