From e24146ec9529e0c028962910ac2efba45e42b9cf Mon Sep 17 00:00:00 2001
From: Jeff Law <law@redhat.com>
Date: Sat, 6 Apr 1996 00:21:35 +0000
Subject:         * compile.c (decode): Use "bit" to hold L_3 immediates
 instead         of holding them in "abs".  Handle ABS8MEM memory references
 aka         8-bit area.  Replace ABSMOV references with ABS8MEM. So we've got
 a chance of simulating something like btst #0,@40:8 correctly. hmse.

---
 sim/h8300/compile.c | 25 +++++++++++++++++++++----
 1 file changed, 21 insertions(+), 4 deletions(-)

(limited to 'sim/h8300/compile.c')

diff --git a/sim/h8300/compile.c b/sim/h8300/compile.c
index 2545b1d..f55249e 100644
--- a/sim/h8300/compile.c
+++ b/sim/h8300/compile.c
@@ -153,6 +153,7 @@ decode (addr, data, dst)
   int rdisp = 0;
   int abs = 0;
   int plen = 0;
+  int bit = 0;
 
   struct h8_opcode *q = h8_opcodes;
   int size = 0;
@@ -286,7 +287,13 @@ decode (addr, data, dst)
 		    {
 		      abs = SEXTCHAR (data[len >> 1]);
 		    }
-		  else
+		  else if (looking_for & ABS8MEM)
+		    {
+		      plen = 8;
+		      abs = h8300hmode ? ~0xff0000ff : ~0xffff00ff;
+		      abs |= data[len >> 1] & 0xff ;
+		    }
+		   else
 		    {
 		      abs = data[len >> 1] & 0xff;
 		    }
@@ -295,7 +302,7 @@ decode (addr, data, dst)
 		{
 		  plen = 3;
 
-		  abs = thisnib;
+		  bit = thisnib;
 		}
 	      else if (looking_for == E)
 		{
@@ -321,7 +328,12 @@ decode (addr, data, dst)
 			    p = &(dst->src);
 			  }
 
-			if (x & (IMM | KBIT | DBIT))
+			if (x & (L_3))
+			  {
+			    p->type = X (OP_IMM, size);
+			    p->literal = bit;
+			  }
+			else if (x & (IMM | KBIT | DBIT))
 			  {
 			    p->type = X (OP_IMM, size);
 			    p->literal = abs;
@@ -351,7 +363,7 @@ decode (addr, data, dst)
 			    p->reg = rn & 0x7;
 			    p->literal = 0;
 			  }
-			else if (x & (ABS | ABSJMP | ABSMOV))
+			else if (x & (ABS | ABSJMP | ABS8MEM))
 			  {
 			    p->type = X (OP_DISP, size);
 			    p->literal = abs;
@@ -574,6 +586,11 @@ fetch (arg, n)
       t &= cpu.mask;
       return t;
 
+    case X (OP_MEM, SW):
+      t = GET_MEMORY_W (abs);
+      t &= cpu.mask;
+      return t;
+
     default:
       abort ();
 
-- 
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