From: Kazu Hirata <kazu@cs.umass.edu>
Date: Thu, 5 Dec 2002 13:19:16 +0000 (+0000)
Subject: h8300.c (shift_alg_si): Optimize ashift:HI and lshiftrt:SI by 28, 29, and 30 bits... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1e5bdc40951e1ff33e3198ee95e0dab94f2c7946;p=gcc.git

h8300.c (shift_alg_si): Optimize ashift:HI and lshiftrt:SI by 28, 29, and 30 bits when !TARGET_H8300.

	* config/h8300/h8300.c (shift_alg_si): Optimize ashift:HI and
	lshiftrt:SI by 28, 29, and 30 bits when !TARGET_H8300.
	(get_shift_alg): Return optimal assembly instructions for the
	shifts mentioned above.

From-SVN: r59859
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d0317f9da6c..4a46107d6ca 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2002-12-05  Kazu Hirata  <kazu@cs.umass.edu>
+
+	* config/h8300/h8300.c (shift_alg_si): Optimize ashift:HI and
+	lshiftrt:SI by 28, 29, and 30 bits when !TARGET_H8300.
+	(get_shift_alg): Return optimal assembly instructions for the
+	shifts mentioned above.
+
 2002-12-04  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* config/h8300/h8300.c (h8300_init_once): Do not use loop to
diff --git a/gcc/config/h8300/h8300.c b/gcc/config/h8300/h8300.c
index 1cd1cdcbc01..eac88bde469 100644
--- a/gcc/config/h8300/h8300.c
+++ b/gcc/config/h8300/h8300.c
@@ -242,11 +242,11 @@ static enum shift_alg shift_alg_si[3][3][32] = {
     { INL, INL, INL, INL, INL, LOP, LOP, LOP,
       SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC,
       SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP,
-      SPC, LOP, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_ASHIFT   */
+      SPC, LOP, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFT   */
     { INL, INL, INL, INL, INL, LOP, LOP, LOP,
       SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC,
       SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP,
-      SPC, LOP, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_LSHIFTRT */
+      SPC, LOP, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_LSHIFTRT */
     { INL, INL, INL, INL, INL, LOP, LOP, LOP,
       SPC, LOP, LOP, LOP, LOP, LOP, LOP, LOP,
       SPC, SPC, SPC, SPC, LOP, LOP, LOP, LOP,
@@ -261,11 +261,11 @@ static enum shift_alg shift_alg_si[3][3][32] = {
     { INL, INL, INL, INL, INL, INL, INL, INL,
       INL, INL, INL, LOP, LOP, LOP, LOP, SPC,
       SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
-      SPC, SPC, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_ASHIFT   */
+      SPC, SPC, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_ASHIFT   */
     { INL, INL, INL, INL, INL, INL, INL, INL,
       INL, INL, INL, LOP, LOP, LOP, LOP, SPC,
       SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
-      SPC, SPC, LOP, LOP, ROT, ROT, ROT, SPC }, /* SHIFT_LSHIFTRT */
+      SPC, SPC, LOP, LOP, SPC, SPC, SPC, SPC }, /* SHIFT_LSHIFTRT */
     { INL, INL, INL, INL, INL, INL, INL, INL,
       INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
       SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
@@ -2725,6 +2725,78 @@ get_shift_alg (shift_type, shift_mode, count, info)
 	      goto end;
 	    }
 	}
+      else if (!TARGET_H8300 && count == 28)
+	{
+	  switch (shift_type)
+	    {
+	    case SHIFT_ASHIFT:
+	      if (TARGET_H8300H)
+		info->special = "sub.w\t%e0,%e0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
+	      else
+		info->special = "sub.w\t%e0,%e0\n\trotr.l\t#2,%S0\n\trotr.l\t#2,%S0\n\tsub.w\t%f0,%f0";
+	      info->shift1  = "";
+	      info->shift2  = "";
+	      goto end;
+	    case SHIFT_LSHIFTRT:
+	      if (TARGET_H8300H)
+		info->special = "sub.w\t%f0,%f0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
+	      else
+		info->special = "sub.w\t%f0,%f0\n\trotl.l\t#2,%S0\n\trotl.l\t#2,%S0\n\tsub.w\t%e0,%e0";
+	      info->shift1  = "";
+	      info->shift2  = "";
+	      goto end;
+	    case SHIFT_ASHIFTRT:
+	      abort ();
+	    }
+	}
+      else if (!TARGET_H8300 && count == 29)
+	{
+	  switch (shift_type)
+	    {
+	    case SHIFT_ASHIFT:
+	      if (TARGET_H8300H)
+		info->special = "sub.w\t%e0,%e0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
+	      else
+		info->special = "sub.w\t%e0,%e0\n\trotr.l\t#2,%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
+	      info->shift1  = "";
+	      info->shift2  = "";
+	      goto end;
+	    case SHIFT_LSHIFTRT:
+	      if (TARGET_H8300H)
+		info->special = "sub.w\t%f0,%f0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
+	      else
+		info->special = "sub.w\t%f0,%f0\n\trotl.l\t#2,%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
+	      info->shift1  = "";
+	      info->shift2  = "";
+	      goto end;
+	    case SHIFT_ASHIFTRT:
+	      abort ();
+	    }
+	}
+      else if (!TARGET_H8300 && count == 30)
+	{
+	  switch (shift_type)
+	    {
+	    case SHIFT_ASHIFT:
+	      if (TARGET_H8300H)
+		info->special = "sub.w\t%e0,%e0\n\trotr.l\t%S0\n\trotr.l\t%S0\n\tsub.w\t%f0,%f0";
+	      else
+		info->special = "sub.w\t%e0,%e0\n\trotr.l\t#2,%S0\n\tsub.w\t%f0,%f0";
+	      info->shift1  = "";
+	      info->shift2  = "";
+	      goto end;
+	    case SHIFT_LSHIFTRT:
+	      if (TARGET_H8300H)
+		info->special = "sub.w\t%f0,%f0\n\trotl.l\t%S0\n\trotl.l\t%S0\n\tsub.w\t%e0,%e0";
+	      else
+		info->special = "sub.w\t%f0,%f0\n\trotl.l\t#2,%S0\n\tsub.w\t%e0,%e0";
+	      info->shift1  = "";
+	      info->shift2  = "";
+	      goto end;
+	    case SHIFT_ASHIFTRT:
+	      abort ();
+	    }
+	}
       else if (count == 31)
 	{
 	  if (TARGET_H8300)