Commit: 727b6b4b411c55d0d6719556bcf6a5da5c54adb6 - binutils_os216 (git)

GNU Binutils with patches for OS216

Commit MetaInfo

• Revision: 727b6b4b411c55d0d6719556bcf6a5da5c54adb6 (tree)
• Time: 2006-03-14 12:34:28
• Author: DJ Delorie <dj@redh...>
• Commiter: DJ Delorie

Log Message

* mem.c (mem_put_byte): Hook simulated UART to stdout.
(mem_put_hi): Hook in simulated trace port.
(mem_get_byte): Hook in simulated uart control port.
* opc2c: Be more picky about matching special comments.
* r8c.opc (shift_op): Limit shift counts to -16..16.
(BMcnd): Map conditional codes.
* reg.c (condition_true): Mask condition code to 4 bits.
* syscalls.c: Include local syscall.h.
* syscall.h: New, copied from libgloss.

Change Summary

• modified: sim/m32c/ChangeLog
• modified: sim/m32c/mem.c
• modified: sim/m32c/r8c.opc
• modified: sim/m32c/reg.c
• add: sim/m32c/syscall.h
• modified: sim/m32c/syscalls.c

Incremental Difference

--- a/sim/m32c/ChangeLog
+++ b/sim/m32c/ChangeLog
@@ -1,3 +1,15 @@
[phone]  DJ Delorie  <[e-mail]>
+
+	* mem.c (mem_put_byte): Hook simulated UART to stdout.
+	(mem_put_hi): Hook in simulated trace port.
+	(mem_get_byte): Hook in simulated uart control port.
+	* opc2c: Be more picky about matching special comments.
+	* r8c.opc (shift_op): Limit shift counts to -16..16.
+	(BMcnd): Map conditional codes.
+	* reg.c (condition_true): Mask condition code to 4 bits.
+	* syscalls.c: Include local syscall.h.
+	* syscall.h: New, copied from libgloss.
+
 2005-10-06  Jim Blandy  <[e-mail]>
 
 	Simulator for Renesas M32C and M16C, by DJ Delorie <[e-mail]>,

--- a/sim/m32c/mem.c
+++ b/sim/m32c/mem.c
@@ -202,6 +202,23 @@ mem_put_byte (int address, unsigned char value)
       }
       break;
 
+    case 0x3aa: /* uart1tx */
+      {
+	static int pending_exit = 0;
+	if (value == 0)
+	  {
+	    if (pending_exit)
+	      {
+		step_result = M32C_MAKE_EXITED(value);
+		return;
+	      }
+	    pending_exit = 1;
+	  }
+	else
+	  putchar(value);
+      }
+      break;
+
     case 0x400:
       m32c_syscall (value);
       break;
@@ -232,6 +249,11 @@ mem_put_qi (int address, unsigned char value)
 void
 mem_put_hi (int address, unsigned short value)
 {
+  if (address == 0x402)
+    {
+      printf ("SimTrace: %06lx %04x\n", regs.r_pc, value);
+      return;
+    }
   S ("<=");
   mem_put_byte (address, value & 0xff);
   mem_put_byte (address + 1, value >> 8);
@@ -288,16 +310,16 @@ mem_get_byte (int address)
   address &= membus_mask;
   S ("=>");
   m = mem_ptr (address);
-  if (trace)
+  switch (address)
     {
-      if (tpr)
+    case 0x3ad: /* uart1c1 */
+      E();
+      return 2; /* transmitter empty */
+      break;
+    default: 
+      if (trace)
 	printf (" %02x", *m);
-      else
-	{
-	  S ("=>");
-	  printf (" %02x", *m);
-	  E ();
-	}
+      break;
     }
   E ();
   return *m;

--- a/sim/m32c/r8c.opc
+++ b/sim/m32c/r8c.opc
@@ -240,6 +240,15 @@ shift_op (srcdest sd, int arith, int count)
     {
       mask = 0xffffffffU;
       msb = 0x80000000U;
+      if (count > 16 || count < -16)
+	{
+	  fprintf(stderr, "Error: SI shift of %d undefined\n", count);
+	  exit(1);
+	}
+      if (count > 16)
+	count = (count - 1) % 16 + 1;
+      if (count < -16)
+	count = -((-count - 1) % 16 + 1);
     }
 
   tprintf("%s %x by %d\n", arith ? "sha" : "shl", v, count);
@@ -292,6 +301,12 @@ shift_op (srcdest sd, int arith, int count)
   tprintf ("b=%d, carry=%d, %s = %d\n", b, carry, #expr, v); \
   set_c (v);
 
+/* The "BMcnd dest" opcode uses a different encoding for the */
+/* condition than other opcodes.  */
+static int bmcnd_cond_map[] = {
+  0, 1, 2, 3, 8, 9, 10, 11, 4, 5, 6, 7, 12, 13, 14, 15
+};
+
 int
 decode_r8c()
 {
@@ -448,7 +463,7 @@ decode_r8c()
   /** 0111 1110 0010 dest  BMcnd dest  */
 
   dc = decode_bit (dest);
-  if (condition_true (IMM (0)))
+  if (condition_true (bmcnd_cond_map [IMM (0) & 15]))
     put_bit (dc, 1);
   else
     put_bit (dc, 0);

--- a/sim/m32c/reg.c
+++ b/sim/m32c/reg.c
@@ -347,7 +347,7 @@ condition_true (int cond_id)
 	"(S^O)|Z", "O", "!(S^O)", "unk",
 	"!((S^O)|Z)", "!O", "S^O", "unk"
       };
-      switch (cond_id)
+      switch (cond_id & 15)
 	{
 	case 0:
 	  f = FLAG_C;
@@ -409,7 +409,7 @@ condition_true (int cond_id)
 	"C", "GTU", "Z", "N",
 	"O", "LE", "LT", "!?"
       };
-      switch (cond_id)
+      switch (cond_id & 15)
 	{
 	case 0:
 	  f = !FLAG_C;

--- /dev/null
+++ b/sim/m32c/syscall.h
@@ -0,0 +1,50 @@
+/* Copied from libgloss */
+/* General use syscall.h file.
+   The more ports that use this file, the simpler sim/common/nltvals.def
+   remains.  */
+
+#ifndef LIBGLOSS_SYSCALL_H
+#define LIBGLOSS_SYSCALL_H
+
+/* Note: This file may be included by assembler source.  */
+
+/* These should be as small as possible to allow a port to use a trap type
+   instruction, which the system call # as the trap (the d10v for instance
+   supports traps 0..31).  An alternative would be to define one trap for doing
+   system calls, and put the system call number in a register that is not used
+   for the normal calling sequence (so that you don't have to shift down the
+   arguments to add the system call number).  Obviously, if these system call
+   numbers are ever changed, all of the simulators and potentially user code
+   will need to be updated.  */
+
+/* There is no current need for the following: SYS_execv, SYS_creat, SYS_wait,
+   etc. etc.  Don't add them.  */
+
+/* These are required by the ANSI C part of newlib (excluding system() of
+   course).  */
+#define	SYS_exit	1
+#define	SYS_open	2
+#define	SYS_close	3
+#define	SYS_read	4
+#define	SYS_write	5
+#define	SYS_lseek	6
+#define	SYS_unlink	7
+#define	SYS_getpid	8
+#define	SYS_kill	9
+#define SYS_fstat       10
+/*#define SYS_sbrk	11 - not currently a system call, but reserved.  */
+
+/* ARGV support.  */
+#define SYS_argvlen	12
+#define SYS_argv	13
+
+/* These are extras added for one reason or another.  */
+#define SYS_chdir	 14
+#define SYS_stat	 15
+#define SYS_chmod 	 16
+#define SYS_utime 	 17
+#define SYS_time 	 18
+#define SYS_gettimeofday 19
+#define SYS_times	 20
+#define SYS_link	 21
+#endif

--- a/sim/m32c/syscalls.c
+++ b/sim/m32c/syscalls.c
@@ -33,7 +33,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 #include "mem.h"
 #include "syscalls.h"
 
-#include "../../libgloss/syscall.h"
+#include "syscall.h"
 
 /* The current syscall callbacks we're using.  */
 static struct host_callback_struct *callbacks;