re PR target/20415 (Vector init builtin produces invalid instruction pshufw)

        PR target/20415
        * config/i386/mmx.md (vec_dupv4hi): Fix predicate.
        * config/i386/i386.c (ix86_expand_vector_init_duplicate): Update
        to match.

From-SVN: r96304

gcc/ChangeLog

+2005-03-11  Richard Henderson  <rth@redhat.com>
+
+	PR target/20415
+	* config/i386/mmx.md (vec_dupv4hi): Fix predicate.
+	* config/i386/i386.c (ix86_expand_vector_init_duplicate): Update
+	to match.
+
 2005-03-11  Richard Sandiford  <rsandifo@redhat.com>
 
 	* config/mips/mips.h (mips_fix_vr4130_string): Declare.

gcc/config/i386/i386.c

@@ -16198,11 +16198,21 @@ ix86_expand_vector_init_duplicate (bool mmx_ok, enum machine_mode mode,
     case V4HImode:
       if (!mmx_ok)
 	return false;
-      val = gen_lowpart (SImode, val);
-      x = gen_rtx_TRUNCATE (HImode, val);
-      x = gen_rtx_VEC_DUPLICATE (mode, x);
-      emit_insn (gen_rtx_SET (VOIDmode, target, x));
-      return true;
+      if (TARGET_SSE || TARGET_3DNOW_A)
+	{
+	  val = gen_lowpart (SImode, val);
+	  x = gen_rtx_TRUNCATE (HImode, val);
+	  x = gen_rtx_VEC_DUPLICATE (mode, x);
+	  emit_insn (gen_rtx_SET (VOIDmode, target, x));
+	  return true;
+	}
+      else
+	{
+	  smode = HImode;
+	  wsmode = SImode;
+	  wvmode = V2SImode;
+	  goto widen;
+	}
 
     case V8QImode:
       if (!mmx_ok)

gcc/config/i386/mmx.md

@@ -1111,7 +1111,7 @@
 	(vec_duplicate:V4HI
 	  (truncate:HI
 	    (match_operand:SI 1 "register_operand" "0"))))]
-  "TARGET_MMX"
+  "TARGET_SSE || TARGET_3DNOW_A"
   "pshufw\t{$0, %0, %0|%0, %0, 0}"
   [(set_attr "type" "mmxcvt")
    (set_attr "mode" "DI")])