arm.md: Provide a big-endian version of the (zero_extend:SI (subreg:QI ...)) splitter.

	* gcc/config/arm/arm.md: Provide a big-endian version of the
	(zero_extend:SI (subreg:QI ...)) splitter.

From-SVN: r108524

gcc/ChangeLog

+2005-12-14  Richard Sandiford  <richard@codesourcery.com>
+
+	* gcc/config/arm/arm.md: Provide a big-endian version of the
+	(zero_extend:SI (subreg:QI ...)) splitter.
+
 2005-12-14  J"orn Rennecke <joern.rennecke@st.com>
 
 	* struct-equiv.c (note_local_live): Handle hard regs with different

gcc/config/arm/arm.md

@@ -3500,6 +3500,16 @@
   ""
 )
 
+(define_split
+  [(set (match_operand:SI 0 "s_register_operand" "")
+	(zero_extend:SI (subreg:QI (match_operand:SI 1 "" "") 3)))
+   (clobber (match_operand:SI 2 "s_register_operand" ""))]
+  "TARGET_ARM && (GET_CODE (operands[1]) != MEM) && BYTES_BIG_ENDIAN"
+  [(set (match_dup 2) (match_dup 1))
+   (set (match_dup 0) (and:SI (match_dup 2) (const_int 255)))]
+  ""
+)
+
 (define_insn "*compareqi_eq0"
   [(set (reg:CC_Z CC_REGNUM)
 	(compare:CC_Z (match_operand:QI 0 "s_register_operand" "r")