rs6000.c (rs6000_output_function_epilogue): Do not emit optional traceback table…

rs6000.c (rs6000_output_function_epilogue): Do not emit optional traceback table if optimize_size or TARGET_ELF.

        * config/rs6000/rs6000.c (rs6000_output_function_epilogue): Do not
        emit optional traceback table if optimize_size or TARGET_ELF.
        * config/rs6000/rs6000.md (prefetch): New.

From-SVN: r48865

gcc/ChangeLog

+2002-01-15  David Edelsohn  <edelsohn@gnu.org>
+
+	* config/rs6000/rs6000.c (rs6000_output_function_epilogue): Do not
+	emit optional traceback table if optimize_size or TARGET_ELF.
+	* config/rs6000/rs6000.md (prefetch): New.
+
 2002-01-15  Andreas Jaeger  <aj@suse.de>
 
 	* config.gcc (x86_64-*-*): Install mmintrin.h and xmmintrin.h.

gcc/config/rs6000/rs6000.c

@@ -9053,6 +9053,7 @@ rs6000_output_function_epilogue (file, size)
      HOST_WIDE_INT size ATTRIBUTE_UNUSED;
 {
   rs6000_stack_t *info = rs6000_stack_info ();
+  int optional_tbtab = (optimize_size || TARGET_ELF) ? 0 : 1;
 
   if (! HAVE_epilogue)
     {
@@ -9098,7 +9099,7 @@ rs6000_output_function_epilogue (file, size)
     {
       const char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
       const char *language_string = lang_hooks.name;
-      int fixed_parms, float_parms, parm_info;
+      int fixed_parms = 0, float_parms = 0, parm_info = 0;
       int i;
 
       while (*fname == '.')	/* V.4 encodes . in the name */
@@ -9158,7 +9159,8 @@ rs6000_output_function_epilogue (file, size)
 	 has controlled storage, function has no toc, function uses fp,
 	 function logs/aborts fp operations.  */
       /* Assume that fp operations are used if any fp reg must be saved.  */
-      fprintf (file, "%d,", (1 << 5) | ((info->first_fp_reg_save != 64) << 1));
+      fprintf (file, "%d,",
+	       (optional_tbtab << 5) | ((info->first_fp_reg_save != 64) << 1));
 
       /* 6 bitfields: function is interrupt handler, name present in
 	 proc table, function calls alloca, on condition directives
@@ -9167,10 +9169,12 @@ rs6000_output_function_epilogue (file, size)
       /* The `function calls alloca' bit seems to be set whenever reg 31 is
 	 set up as a frame pointer, even when there is no alloca call.  */
       fprintf (file, "%d,",
-	       ((1 << 6) | (frame_pointer_needed << 5)
-		| (info->cr_save_p << 1) | (info->lr_save_p)));
+	       ((optional_tbtab << 6)
+		| ((optional_tbtab & frame_pointer_needed) << 5)
+		| (info->cr_save_p << 1)
+		| (info->lr_save_p)));
 
-      /* 3 bitfields: saves backchain, spare bit, number of fpr saved
+      /* 3 bitfields: saves backchain, fixup code, number of fpr saved
 	 (6 bits).  */
       fprintf (file, "%d,",
 	       (info->push_p << 7) | (64 - info->first_fp_reg_save));
@@ -9178,16 +9182,12 @@ rs6000_output_function_epilogue (file, size)
       /* 2 bitfields: spare bits (2 bits), number of gpr saved (6 bits).  */
       fprintf (file, "%d,", (32 - first_reg_to_save ()));
 
+      if (optional_tbtab)
 	{
 	  /* Compute the parameter info from the function decl argument
 	     list.  */
 	  tree decl;
-	int next_parm_info_bit;
-
-	next_parm_info_bit = 31;
-	parm_info = 0;
-	fixed_parms = 0;
-	float_parms = 0;
+	  int next_parm_info_bit = 31;
 
 	  for (decl = DECL_ARGUMENTS (current_function_decl);
 	       decl; decl = TREE_CHAIN (decl))
@@ -9240,6 +9240,9 @@ rs6000_output_function_epilogue (file, size)
 	 seems to set the bit when not optimizing.  */
       fprintf (file, "%d\n", ((float_parms << 1) | (! optimize)));
 
+      if (! optional_tbtab)
+	return;
+
       /* Optional fields follow.  Some are variable length.  */
 
       /* Parameter types, left adjusted bit fields: 0 fixed, 10 single float,
@@ -9289,6 +9292,7 @@ rs6000_output_function_epilogue (file, size)
       if (frame_pointer_needed)
 	fputs ("\t.byte 31\n", file);
     }
+  return;
 }
 
 /* A C compound statement that outputs the assembler code for a thunk

gcc/config/rs6000/rs6000.md

@@ -13846,6 +13846,42 @@
   DONE;
 }")
 
+(define_expand "prefetch"
+  [(prefetch (match_operand 0 "address_operand" "p")
+	     (match_operand 1 "const_int_operand" "n")
+	     (match_operand 2 "const_int_operand" "n"))]
+  "TARGET_POWERPC"
+  "
+{
+  if (TARGET_32BIT)
+    emit_insn (gen_prefetchsi (operands[0], operands[1], operands[2]));
+  else
+    emit_insn (gen_prefetchdi (operands[0], operands[1], operands[2]));
+  DONE;
+}")
+
+(define_insn "prefetchsi"
+  [(prefetch (match_operand:SI 0 "address_operand" "r")
+	     (match_operand:SI 1 "const_int_operand" "n")
+	     (match_operand:SI 2 "const_int_operand" "n"))]
+  "TARGET_POWERPC && TARGET_32BIT"
+  "*
+{
+  return INTVAL (operands[1]) ? \"dcbtst 0,%0\" : \"dcbt 0,%0\";
+}"
+  [(set_attr "type" "load")])
+
+(define_insn "prefetchdi"
+  [(prefetch (match_operand:DI 0 "address_operand" "r")
+	     (match_operand:DI 1 "const_int_operand" "n")
+	     (match_operand:DI 2 "const_int_operand" "n"))]
+  "TARGET_POWERPC && TARGET_64BIT"
+  "*
+{
+  return INTVAL (operands[1]) ? \"dcbtst 0,%0\" : \"dcbt 0,%0\";
+}"
+  [(set_attr "type" "load")])
+
 ;; AltiVec patterns
 
 ;; Generic LVX load instruction.