From: H.J. Lu <hjl@gnu.org>
Date: Sun, 26 Jul 1998 00:13:01 +0000 (+0000)
Subject: i386.c (output_to_reg): Add code to emulate non-popping DImode case.
X-Git-Tag: prereleases/egcs-1.1-prerelease~170
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6d3d79c8557f85b14dd9e3e6393ef56119c252f7;p=thirdparty%2Fgcc.git

i386.c (output_to_reg): Add code to emulate non-popping DImode case.

�
        * i386.c (output_to_reg): Add code to emulate non-popping DImode
        case.

From-SVN: r21390
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index ed3ade8a40ec..85d36f68cafc 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+Sun Jul 26 01:11:12 1998  H.J. Lu  (hjl@gnu.org)
+
+	* i386.c (output_to_reg): Add code to emulate non-popping DImode
+	case.
+
 Sun Jul 26 01:02:54 1998  Jeffrey A Law  (law@cygnus.com)
 
 	* regmove.c (regmove_optimize): Fix typo initializing regmove_bb_head.
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 76f5370f410e..8e5211f13379 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -891,6 +891,17 @@ output_to_reg (dest, dies, scratch_mem)
     {
       if (dies)
 	output_asm_insn (AS1 (fistp%z3,%y0), xops);
+      else if (GET_MODE (xops[3]) == DImode && ! dies)
+	{
+	  /* There is no DImode version of this without a stack pop, so
+	     we must emulate it.  It doesn't matter much what the second
+	     instruction is, because the value being pushed on the FP stack
+	     is not used except for the following stack popping store.
+	     This case can only happen without optimization, so it doesn't
+	     matter that it is inefficient.  */
+	  output_asm_insn (AS1 (fistp%z3,%0), xops);
+	  output_asm_insn (AS1 (fild%z3,%0), xops);
+	}
       else
 	output_asm_insn (AS1 (fist%z3,%y0), xops);
     }