From: Frank Ch. Eigler <fche@redhat.com>
Date: Thu, 16 Apr 1998 19:27:55 +0000 (+0000)
Subject: * Adapted R5900 COP2 interface code to clarified micro-mode interlock
X-Git-Tag: gdb-4_18~2606
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fc4e5b84c8fa9e228c17d6a545c6e50eaeb68085;p=external%2Fbinutils.git

* Adapted R5900 COP2 interface code to clarified micro-mode interlock
  behavior.
---

diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog
index 6a34a66..1802105 100644
--- a/sim/mips/ChangeLog
+++ b/sim/mips/ChangeLog
@@ -1,3 +1,10 @@
+start-sanitize-sky
+Thu Apr 16 15:24:14 1998  Frank Ch. Eigler  <fche@cygnus.com>
+
+	* interp.c (decode_coproc): Adapt COP2 micro interlock to
+	clarified specs.  Reset "M" bit; exit also on "E" bit.
+
+end-sanitize-sky
 start-sanitize-r5900
 Thu Apr 16 10:40:29 1998  Andrew Cagney  <cagney@b1.cygnus.com>
 
diff --git a/sim/mips/interp.c b/sim/mips/interp.c
index 3e83dfc..5ed3d44 100644
--- a/sim/mips/interp.c
+++ b/sim/mips/interp.c
@@ -3316,12 +3316,17 @@ decode_coproc (SIM_DESC sd,
 	    int rt = i_20_16;
 	    int id = i_15_11;
 
-	    /* interlock checking */
+	    /* interlock checking: wait until M or E bits set */
 	    /* POLICY: never busy in macro mode */
-	    if(vu0_busy() && interlock)
+	    while(vu0_busy() && interlock)
 	      {
-		while(! vu0_micro_interlock_released())
-		  vu0_issue(sd);
+		if(vu0_micro_interlock_released())
+		  {
+		    vu0_micro_interlock_clear();
+		    break;
+		  }
+
+		vu0_issue(sd);
 	      }
 	    
 	    /* perform VU register address */