i386.md: Change ix86_cpu == PROCESSOR_PENTIUM to TARGET_PENTIUM

        * i386.md: Change ix86_cpu == PROCESSOR_PENTIUM to TARGET_PENTIUM
        (zero_extendsidi2): Use # in output template and handle completely by
        splits.
        (zero_extend splitters): New define_splits.
        (ashiftrt_32): New pattern.

Co-Authored-By: Jeffrey A Law <law@cygnus.com>

From-SVN: r23418

gcc/ChangeLog

+Thu Oct 29 01:33:54 1998  Jan Hubicka <hubicka@freesoft.cz>
+			  Jeffrey A Law  (law@cygnus.com)
+
+	* i386.md: Change ix86_cpu == PROCESSOR_PENTIUM to TARGET_PENTIUM
+	(zero_extendsidi2): Use # in output template and handle completely by
+	splits.
+	(zero_extend splitters): New define_splits.
+	(ashiftrt_32): New pattern.
+
 Wed Oct 28 22:58:35 1998  Jason Merrill  <jason@yorick.cygnus.com>
 
 	* tree.c (append_random_chars): New fn.

gcc/config/i386/i386.md

@@ -1252,7 +1252,7 @@
      It is at least as fast as xor on any processor except a Pentium. */
 
   if (operands[1] == const1_rtx
-      && ix86_cpu == PROCESSOR_PENTIUM
+      && TARGET_PENTIUM
       && (link = find_reg_note (insn, REG_WAS_0, 0))
       /* Make sure the insn that stored the 0 is still present.  */
       && ! INSN_DELETED_P (XEXP (link, 0))
@@ -1313,7 +1313,7 @@
   /* movb $0,reg8 is 2 bytes, the same as xorl reg8,reg8.  */
 
   if (operands[1] == const1_rtx
-      && ix86_cpu == PROCESSOR_PENTIUM
+      && TARGET_PENTIUM
       && ! NON_QI_REG_P (operands[0])
       && (link = find_reg_note (insn, REG_WAS_0, 0))
       /* Make sure the insn that stored the 0 is still present.  */
@@ -2022,34 +2022,25 @@
  "operands[2] = gen_rtx_REG (SImode, true_regnum (operands[1]));")
 
 (define_insn "zero_extendsidi2"
-  [(set (match_operand:DI 0 "nonimmediate_operand" "=r,?r,?m")
-	(zero_extend:DI (match_operand:SI 1 "register_operand" "0,rm,r")))]
+  [(set (match_operand:DI 0 "nonimmediate_operand" "=r,?r,?*o")
+	(zero_extend:DI (match_operand:SI 1 "general_operand" "0,rm,r")))]
   ""
-  "*
-  {
-  rtx high[2], low[2], xops[4];
-
-  if (REG_P (operands[0]) && REG_P (operands[1])
-      && REGNO (operands[0]) == REGNO (operands[1]))
-    {
-      operands[0] = gen_rtx_REG (SImode, REGNO (operands[0]) + 1);
-      return AS2 (xor%L0,%0,%0);
-    }
-
-  split_di (operands, 1, low, high);
-  xops[0] = low[0];
-  xops[1] = operands[1];
-  xops[2] = high[0];
-  xops[3] = const0_rtx;
-
-  output_asm_insn (AS2 (mov%L0,%1,%0), xops);
-  if (GET_CODE (low[0]) == MEM)
-    output_asm_insn (AS2 (mov%L2,%3,%2), xops);
-  else
-    output_asm_insn (AS2 (xor%L2,%2,%2), xops);
+  "#")
 
-  RET;
-}")
+(define_split 
+  [(set (match_operand:DI 0 "register_operand" "")
+	(zero_extend:DI (match_operand:SI 1 "register_operand" "")))]
+  "reload_completed && true_regnum (operands[0]) == true_regnum (operands[1])"
+  [(set (match_dup 4) (const_int 0))]
+  "split_di (&operands[0], 1, &operands[3], &operands[4]);")
+
+(define_split 
+  [(set (match_operand:DI 0 "nonimmediate_operand" "")
+	(zero_extend:DI (match_operand:SI 1 "general_operand" "")))]
+  "reload_completed"
+  [(set (match_dup 3) (match_dup 1))
+   (set (match_dup 4) (const_int 0))]
+  "split_di (&operands[0], 1, &operands[3], &operands[4]);")
 
 ;;- sign extension instructions
 
@@ -4851,6 +4842,15 @@ byte_xor_operation:
   RET;
 }")
 
+(define_insn "ashrsi3_31"
+  [(set (match_operand:SI 0 "nonimmediate_operand" "=rm,d")
+	(ashiftrt:SI (match_operand:SI 1 "nonimmediate_operand" "0,a")
+		     (const_int 31)))]
+  "!TARGET_PENTIUM || optimize_size"
+  "@
+    sar%L0 $31,%0
+    cltd")
+
 (define_insn "ashrsi3"
   [(set (match_operand:SI 0 "nonimmediate_operand" "=rm")
 	(ashiftrt:SI (match_operand:SI 1 "nonimmediate_operand" "0")