From: Kazu Hirata <kazu@cs.umass.edu>
Date: Wed, 19 Feb 2003 21:21:21 +0000 (+0000)
Subject: h8300.c (output_logical_op): Optimize or.l when ORing with 0xffff??00 with the highes... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=472f272337752547c77fc9607f627edb08afcd61;p=gcc.git

h8300.c (output_logical_op): Optimize or.l when ORing with 0xffff??00 with the highest bit of the ?? part set.

	* config/h8300/h8300.c (output_logical_op): Optimize or.l when
	ORing with 0xffff??00 with the highest bit of the ?? part set.
	(compute_logical_op_length): Update.
	(compute_logical_op_cc): Likewise.

From-SVN: r63131
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d083a31cf0c..fb7d4423d16 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2003-02-19  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* config/h8300/h8300.c (output_logical_op): Optimize or.l when
+	ORing with 0xffff??00 with the highest bit of the ?? part set.
+	(compute_logical_op_length): Update.
+	(compute_logical_op_cc): Likewise.
+
 2003-02-19  Josef Zlomek  <zlomekj@suse.cz>
 
 	* bb-reorder.c (find_traces_1_round): Fixed condition for small
diff --git a/gcc/config/h8300/h8300.c b/gcc/config/h8300/h8300.c
index 173946cbc72..08a7cc606a6 100644
--- a/gcc/config/h8300/h8300.c
+++ b/gcc/config/h8300/h8300.c
@@ -2206,7 +2206,9 @@ output_logical_op (mode, operands)
 	 using multiple insns.  */
       if ((TARGET_H8300H || TARGET_H8300S)
 	  && w0 != 0 && w1 != 0
-	  && !(lower_half_easy_p && upper_half_easy_p))
+	  && !(lower_half_easy_p && upper_half_easy_p)
+	  && !(code == IOR && w1 == 0xffff
+	       && (w0 & 0x8000) != 0 && lower_half_easy_p))
 	{
 	  sprintf (insn_buf, "%s.l\t%%S2,%%S0", opname);
 	  output_asm_insn (insn_buf, operands);
@@ -2250,6 +2252,13 @@ output_logical_op (mode, operands)
 	    output_asm_insn ((code == AND)
 			     ? "sub.w\t%e0,%e0" : "not.w\t%e0",
 			     operands);
+	  else if ((TARGET_H8300H || TARGET_H8300S)
+		   && code == IOR
+		   && w1 == 0xffff
+		   && (w0 & 0x8000) != 0)
+	    {
+	      output_asm_insn ("exts.l\t%S0", operands);
+	    }
 	  else if ((TARGET_H8300H || TARGET_H8300S)
 		   && code == AND
 		   && w1 == 0xff00)
@@ -2354,7 +2363,9 @@ compute_logical_op_length (mode, operands)
 	 using multiple insns.  */
       if ((TARGET_H8300H || TARGET_H8300S)
 	  && w0 != 0 && w1 != 0
-	  && !(lower_half_easy_p && upper_half_easy_p))
+	  && !(lower_half_easy_p && upper_half_easy_p)
+	  && !(code == IOR && w1 == 0xffff
+	       && (w0 & 0x8000) != 0 && lower_half_easy_p))
 	{
 	  if (REG_P (operands[2]))
 	    length += 4;
@@ -2394,6 +2405,13 @@ compute_logical_op_length (mode, operands)
 	    {
 	      length += 2;
 	    }
+	  else if ((TARGET_H8300H || TARGET_H8300S)
+		   && code == IOR
+		   && w1 == 0xffff
+		   && (w0 & 0x8000) != 0)
+	    {
+	      length += 2;
+	    }
 	  else if ((TARGET_H8300H || TARGET_H8300S)
 		   && code == AND
 		   && w1 == 0xff00)
@@ -2475,10 +2493,22 @@ compute_logical_op_cc (mode, operands)
 	 using multiple insns.  */
       if ((TARGET_H8300H || TARGET_H8300S)
 	  && w0 != 0 && w1 != 0
-	  && !(lower_half_easy_p && upper_half_easy_p))
+	  && !(lower_half_easy_p && upper_half_easy_p)
+	  && !(code == IOR && w1 == 0xffff
+	       && (w0 & 0x8000) != 0 && lower_half_easy_p))
 	{
 	  cc = CC_SET_ZNV;
 	}
+      else
+	{
+	  if ((TARGET_H8300H || TARGET_H8300S)
+	      && code == IOR
+	      && w1 == 0xffff
+	      && (w0 & 0x8000) != 0)
+	    {
+	      cc = CC_SET_ZNV;
+	    }
+	}
       break;
     default:
       abort ();