don't use psh.w sp

From-SVN: r2683

gcc/config/convex/convex.h

@@ -315,7 +315,10 @@ enum reg_class {
 /* S regs use the letter 'd' because 's' is taken. */
 
 #define REG_CLASS_FROM_LETTER(C) \
-  ((C) == 'a' ? A_REGS : (C) == 'd' ? S_REGS : NO_REGS)
+  ((C) == 'a' ? A_REGS : \
+   (C) == 'd' ? S_REGS : \
+   (C) == 'A' ? INDEX_REGS : \
+   NO_REGS)
 
 /* The letters I, J, K, L and M in a register constraint string
    can be used to stand for particular ranges of immediate operands.

gcc/config/convex/convex.md

@@ -249,6 +249,14 @@
   ""
   "")
 
+(define_insn ""
+  [(set (match_operand:SI 0 "push_operand" "=<,<")
+	(match_operand:SI 1 "general_operand" "Ad,io"))]
+  ""
+  "@
+   psh.w %1
+   pshea %a1")
+
 (define_insn ""
   [(set (match_operand:SI 0 "general_operand" "=g,r,<")
 	(match_operand:SI 1 "general_operand" "r,g,io"))]