[Patch 3/7]: 68HC11 port of gdb (sim-16bit support)

Stephane Carrez Stephane.Carrez@free.fr
Sun Jun 25 13:36:00 GMT 2000


Hi!

The following patch adds support for 16-bit targets in the simulator
common framework.

	Stephane

The ChangeLog for gdb/sim/common/ChangeLog is


2000-06-25  Stephane Carrez  <Stephane.Carrez@worldnet.fr>

	* sim-bits.h (_MSB_16, _LSB_16): Define for 16-bit targets.
	(MASK, LSBIT, MSBIT): Likewise and use _MSB_16 and _LSB_16.
	(EXTENDED): Define for 16-bit word size.
	* sim-bits.c (LSEXTRACTED, MSEXTRACTED, LSINSERTED,
	MSINSERTED, LSSEXT, MSSEXT): Implement for 16-bit word size.
	* sim-types.h: Added support for 16-bit targets.
diff -Nrup --exclude-from=gdb-exclude.lst /src/gnu/cygnus/gdb/sim/common/sim-bits.c gdb/sim/common/sim-bits.c
--- /src/gnu/cygnus/gdb/sim/common/sim-bits.c	Fri Apr 16 03:34:57 1999
+++ gdb/sim/common/sim-bits.c	Sat Jun 17 11:59:43 2000
@@ -72,6 +72,17 @@ LSEXTRACTED (unsigned_word val,
       return val;
     }
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+  if (stop >= 16)
+    return 0;
+  else
+    {
+      if (start < 16)
+	val &= LSMASK (start, 0);
+      val >>= stop;
+      return val;
+    }
+#endif
 }
 
 
@@ -96,6 +107,17 @@ MSEXTRACTED (unsigned_word val,
       return val;
     }
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+  if (stop < 16)
+    return 0;
+  else
+    {
+      if (start >= 16)
+	val &= MSMASK (start, 64 - 1);
+      val >>= (64 - stop - 1);
+      return val;
+    }
+#endif
 }
 
 
@@ -121,6 +143,18 @@ LSINSERTED (unsigned_word val,
       return val;
     }
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+  /* Bit numbers are 63..0, even for 16 bit targets.
+     On 16 bit targets we ignore 63..16  */
+  if (stop >= 16)
+    return 0;
+  else
+    {
+      val <<= stop;
+      val &= LSMASK (start, stop);
+      return val;
+    }
+#endif
 }
 
 INLINE_SIM_BITS\
@@ -145,6 +179,18 @@ MSINSERTED (unsigned_word val,
       return val;
     }
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+  /* Bit numbers are 0..63, even for 16 bit targets.
+     On 16 bit targets we ignore 0..47.  */
+  if (stop < 32 + 16)
+    return 0;
+  else
+    {
+      val <<= ((64 - 1) - stop);
+      val &= MSMASK (start, stop);
+      return val;
+    }
+#endif
 }
 
 
@@ -166,6 +212,14 @@ LSSEXT (signed_word val,
     return val;
   }
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+  if (sign_bit >= 16)
+    return val;
+  else {
+    val = LSSEXT16 (val, sign_bit);
+    return val;
+  }
+#endif
 }
 
 INLINE_SIM_BITS\
@@ -182,6 +236,14 @@ MSSEXT (signed_word val,
     return val;
   else {
     val = MSSEXT32 (val, sign_bit - 32);
+    return val;
+  }
+#endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+  if (sign_bit < 32 + 16)
+    return val;
+  else {
+    val = MSSEXT16 (val, sign_bit - 32 - 16);
     return val;
   }
 #endif
diff -Nrup --exclude-from=gdb-exclude.lst /src/gnu/cygnus/gdb/sim/common/sim-bits.h gdb/sim/common/sim-bits.h
--- /src/gnu/cygnus/gdb/sim/common/sim-bits.h	Fri Apr 16 03:34:57 1999
+++ gdb/sim/common/sim-bits.h	Sat Jun 17 12:09:26 2000
@@ -166,20 +166,32 @@
 #define _MSB_32(START, STOP) (START <= STOP \
 			      ? (START < 32 ? 0 : START - 32) \
 			      : (STOP < 32 ? 0 : STOP - 32))
+#define _MSB_16(START, STOP) (START <= STOP \
+			      ? (START < 48 ? 0 : START - 48) \
+			      : (STOP < 48 ? 0 : STOP - 48))
 #else
 #define _MSB_32(START, STOP) (START >= STOP \
 			      ? (START >= 32 ? 31 : START) \
 			      : (STOP >= 32 ? 31 : STOP))
+#define _MSB_16(START, STOP) (START >= STOP \
+			      ? (START >= 16 ? 15 : START) \
+			      : (STOP >= 16 ? 15 : STOP))
 #endif
 
 #if (WITH_TARGET_WORD_MSB == 0)
 #define _LSB_32(START, STOP) (START <= STOP \
 			      ? (STOP < 32 ? 0 : STOP - 32) \
 			      : (START < 32 ? 0 : START - 32))
+#define _LSB_16(START, STOP) (START <= STOP \
+			      ? (STOP < 48 ? 0 : STOP - 48) \
+			      : (START < 48 ? 0 : START - 48))
 #else
 #define _LSB_32(START, STOP) (START >= STOP \
 			      ? (STOP >= 32 ? 31 : STOP) \
 			      : (START >= 32 ? 31 : START))
+#define _LSB_16(START, STOP) (START >= STOP \
+			      ? (STOP >= 16 ? 15 : STOP) \
+			      : (START >= 16 ? 15 : START))
 #endif
 
 #if (WITH_TARGET_WORD_MSB == 0)
@@ -204,11 +216,17 @@
 
 #if (WITH_TARGET_WORD_BITSIZE == 64)
 #define LSBIT(POS) LSBIT64 (POS)
-#else
+#endif
+#if (WITH_TARGET_WORD_BITSIZE == 32)
 #define LSBIT(POS) ((unsigned32)((POS) >= 32 \
 		                 ? 0 \
 			         : (1 << ((POS) >= 32 ? 0 : (POS)))))
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+#define LSBIT(POS) ((unsigned16)((POS) >= 16 \
+		                 ? 0 \
+			         : (1 << ((POS) >= 16 ? 0 : (POS)))))
+#endif
 
 
 #define MSBIT8(POS)  ((unsigned8) 1 << ( 8 - 1 - (POS)))
@@ -218,11 +236,17 @@
 
 #if (WITH_TARGET_WORD_BITSIZE == 64)
 #define MSBIT(POS) MSBIT64 (POS)
-#else
+#endif
+#if (WITH_TARGET_WORD_BITSIZE == 32)
 #define MSBIT(POS) ((unsigned32)((POS) < 32 \
 		                 ? 0 \
 		                 : (1 << ((POS) < 32 ? 0 : (64 - 1) - (POS)))))
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+#define MSBIT(POS) ((unsigned16)((POS) < 48 \
+		                 ? 0 \
+		                 : (1 << ((POS) < 48 ? 0 : (64 - 1) - (POS)))))
+#endif
 
 
 /* Bit operations */
@@ -287,6 +311,23 @@
 		      _MSB_POS (32, 0), \
 		      _MSB_32 ((START), (STOP))))))
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+#define MASK(START, STOP) \
+     (_POS_LE ((START), (STOP)) \
+      ? (_POS_LE ((STOP), _MSB_POS (64, 15)) \
+	 ? 0 \
+	 : _MASKn (16, \
+		   _MSB_16 ((START), (STOP)), \
+		   _LSB_16 ((START), (STOP)))) \
+      : (_MASKn (16, \
+		 _LSB_16 ((START), (STOP)), \
+		 _LSB_POS (16, 0)) \
+	 | (_POS_LE ((STOP), _MSB_POS (64, 15)) \
+	    ? 0 \
+	    : _MASKn (16, \
+		      _MSB_POS (16, 0), \
+		      _MSB_16 ((START), (STOP))))))
+#endif
 #if !defined (MASK)
 #error "MASK never undefined"
 #endif
@@ -473,6 +514,9 @@ INLINE_SIM_BITS(unsigned_word) MSINSERTE
 #define EXTENDED(X)     ((signed64)(signed32)(X))
 #endif
 #if (WITH_TARGET_WORD_BITSIZE == 32)
+#define EXTENDED(X)     (X)
+#endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
 #define EXTENDED(X)     (X)
 #endif
 
diff -Nrup --exclude-from=gdb-exclude.lst /src/gnu/cygnus/gdb/sim/common/sim-types.h gdb/sim/common/sim-types.h
--- /src/gnu/cygnus/gdb/sim/common/sim-types.h	Fri Apr 16 03:34:59 1999
+++ gdb/sim/common/sim-types.h	Mon Feb 21 09:00:23 2000
@@ -164,6 +164,10 @@ typedef signed64 signed_word;
 typedef unsigned32 unsigned_word;
 typedef signed32 signed_word;
 #endif
+#if (WITH_TARGET_WORD_BITSIZE == 16)
+typedef unsigned16 unsigned_word;
+typedef signed16 signed_word;
+#endif
 
 
 /* Other instructions */
@@ -174,6 +178,10 @@ typedef signed64 signed_address;
 #if (WITH_TARGET_ADDRESS_BITSIZE == 32)
 typedef unsigned32 unsigned_address;
 typedef signed32 signed_address;
+#endif
+#if (WITH_TARGET_ADDRESS_BITSIZE == 16)
+typedef unsigned16 unsigned_address;
+typedef signed16 signed_address;
 #endif
 typedef unsigned_address address_word;
 



More information about the Gdb-patches mailing list