i386.c (function_arg_advance): Pass SSE arguments in registers.

        * i386.c (function_arg_advance):  Pass SSE arguments in registers.
	(function_arg): Likewise.

Co-Authored-By: Bernd Schmidt <bernds@redhat.com>
Co-Authored-By: Jan Hubicka <jh@suse.cz>

From-SVN: r39955

gcc/ChangeLog

+Wed Feb 21 18:57:28 CET 2001  Catherine Moore  <clm@redhat.com>
+			      Bernd Schmidt  <bernds@redhat.com>
+			      Jan Hubicka  <jh@suse.cz>
+
+        * i386.c (function_arg_advance):  Pass SSE arguments in registers.
+	(function_arg): Likewise.
+
 Wed Feb 21 18:12:41 CET 2001  Jan Hubicka  <jh@suse.cz>
 
 	* i386.md (mmx_lshrdi3, mmx_ashldi3): Guard by unspec.

gcc/config/i386/i386.c

@@ -916,17 +916,29 @@ function_arg_advance (cum, mode, type, named)
     fprintf (stderr,
 	     "function_adv (sz=%d, wds=%2d, nregs=%d, mode=%s, named=%d)\n\n",
 	     words, cum->words, cum->nregs, GET_MODE_NAME (mode), named);
-
-  cum->words += words;
-  cum->nregs -= words;
-  cum->regno += words;
-
-  if (cum->nregs <= 0)
+  if (TARGET_SSE && mode == TImode)
     {
-      cum->nregs = 0;
-      cum->regno = 0;
+      cum->sse_words += words;
+      cum->sse_nregs -= 1;
+      cum->sse_regno += 1;
+      if (cum->sse_nregs <= 0)
+	{
+	  cum->sse_nregs = 0;
+	  cum->sse_regno = 0;
+	}
     }
+  else         
+    {
+      cum->words += words;
+      cum->nregs -= words;
+      cum->regno += words;
 
+      if (cum->nregs <= 0)
+	{
+	  cum->nregs = 0;
+	  cum->regno = 0;
+	}
+    }
   return;
 }
 
@@ -969,6 +981,10 @@ function_arg (cum, mode, type, named)
       if (words <= cum->nregs)
 	ret = gen_rtx_REG (mode, cum->regno);
       break;
+    case TImode:
+      if (cum->sse_nregs)
+        ret = gen_rtx_REG (mode, cum->sse_regno);
+      break;    
     }
 
   if (TARGET_DEBUG_ARG)