Fix for string-opt-7 failure on rs6000 -maix64.

From-SVN: r49593

gcc/ChangeLog

+2002-02-07  Tom Rix  <trix@redhat.com>
+
+	* config/rs6000/rs6000.c (reg_or_aligned_short_operand): New. For 
+	immediates in ldu and stdu DS opcode field.
+	* config/rs6000/rs6000.md (movdi_update, movdi_update1): Use.
+	* config/rs6000/rs6000-protos.h: Add reg_or_aligned_short_operand.
+	* config/rs6000/rs6000.h (PREDICATE_CODES): Same.
+
 2002-02-07  Jeff Sturm  <jsturm@one-point.com>
 
 	* config/sparc/sparc.c (compute_frame_size): Don't correct frame

gcc/config/rs6000/rs6000-protos.h

@@ -40,6 +40,7 @@ extern int cc_reg_operand PARAMS ((rtx, enum machine_mode));
 extern int cc_reg_not_cr0_operand PARAMS ((rtx, enum machine_mode));
 extern int reg_or_short_operand PARAMS ((rtx, enum machine_mode));
 extern int reg_or_neg_short_operand PARAMS ((rtx, enum machine_mode));
+extern int reg_or_aligned_short_operand PARAMS ((rtx, enum machine_mode));
 extern int reg_or_u_short_operand PARAMS ((rtx, enum machine_mode));
 extern int reg_or_cint_operand PARAMS ((rtx, enum machine_mode));
 extern int reg_or_arith_cint_operand PARAMS ((rtx, enum machine_mode));

gcc/config/rs6000/rs6000.c

@@ -850,6 +850,24 @@ reg_or_neg_short_operand (op, mode)
   return gpc_reg_operand (op, mode);
 }
 
+/* Returns 1 if OP is either a constant integer valid for a DS-field or
+   a non-special register.  If a register, it must be in the proper
+   mode unless MODE is VOIDmode.  */
+
+int
+reg_or_aligned_short_operand (op, mode)
+      rtx op;
+      enum machine_mode mode;
+{
+  if (gpc_reg_operand (op, mode))
+    return 1;
+  else if (short_cint_operand (op, mode) && !(INTVAL (op) & 3))
+    return 1;
+
+  return 0;
+}
+
+
 /* Return 1 if the operand is either a register or an integer whose
    high-order 16 bits are zero.  */
 

gcc/config/rs6000/rs6000.h

@@ -2715,6 +2715,7 @@ extern char rs6000_reg_names[][8];	/* register names (0 vs. %r0).  */
   {"cc_reg_not_cr0_operand", {SUBREG, REG}},				   \
   {"reg_or_short_operand", {SUBREG, REG, CONST_INT}},			   \
   {"reg_or_neg_short_operand", {SUBREG, REG, CONST_INT}},		   \
+  {"reg_or_aligned_short_operand", {SUBREG, REG, CONST_INT}},		   \
   {"reg_or_u_short_operand", {SUBREG, REG, CONST_INT}},			   \
   {"reg_or_cint_operand", {SUBREG, REG, CONST_INT}},			   \
   {"reg_or_arith_cint_operand", {SUBREG, REG, CONST_INT}},		   \

gcc/config/rs6000/rs6000.md

@@ -9173,7 +9173,7 @@
 (define_insn "*movdi_update1"
   [(set (match_operand:DI 3 "gpc_reg_operand" "=r,r")
 	(mem:DI (plus:DI (match_operand:DI 1 "gpc_reg_operand" "0,0")
-			 (match_operand:DI 2 "reg_or_short_operand" "r,I"))))
+			 (match_operand:DI 2 "reg_or_aligned_short_operand" "r,I"))))
    (set (match_operand:DI 0 "gpc_reg_operand" "=b,b")
 	(plus:DI (match_dup 1) (match_dup 2)))]
   "TARGET_POWERPC64 && TARGET_UPDATE"
@@ -9195,7 +9195,7 @@
 
 (define_insn "movdi_update"
   [(set (mem:DI (plus:DI (match_operand:DI 1 "gpc_reg_operand" "0,0")
-			 (match_operand:DI 2 "reg_or_short_operand" "r,I")))
+			 (match_operand:DI 2 "reg_or_aligned_short_operand" "r,I")))
 	(match_operand:DI 3 "gpc_reg_operand" "r,r"))
    (set (match_operand:DI 0 "gpc_reg_operand" "=b,b")
 	(plus:DI (match_dup 1) (match_dup 2)))]
@@ -15323,7 +15323,7 @@
 	(eq:SI (reg:CC 74)
 	       (const_int 0)))]
   "TARGET_ALTIVEC"
-  "")
+  "")	
 
 (define_expand "cr6_test_for_zero_reverse"
   [(set (match_operand:SI 0 "register_operand" "=r")