* 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.

diff --git a/sim/m32c/ChangeLog b/sim/m32c/ChangeLog
index 0e44c07b8e0e0ab551c9b9020dee61e42530db01..9c3cae113271fcb023513defd29357c1753837a5 100644 (file)
--- a/sim/m32c/ChangeLog
+++ b/sim/m32c/ChangeLog
@@ -1,3 +1,15 @@
+2006-03-13  DJ Delorie  <dj@redhat.com>
+
+       * 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  <jimb@redhat.com>
 
        Simulator for Renesas M32C and M16C, by DJ Delorie <dj@redhat.com>,

diff --git a/sim/m32c/mem.c b/sim/m32c/mem.c
index d7623a4b88c5cfd33b76bd8479ceac2c7199dc78..258c295ea61d75fe03bd7fb6c8f36230a148c495 100644 (file)
--- 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;

diff --git a/sim/m32c/r8c.opc b/sim/m32c/r8c.opc
index 4a6ba51b7866de804202a818c724a260dbed2759..4db0bda030803e2029094264be00948efce80c9c 100644 (file)
--- 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);

diff --git a/sim/m32c/reg.c b/sim/m32c/reg.c
index 40cb11c46856bf536f7f0680de8ed7bb2ef6fbae..8c01675d39f577527dbc34300d2eba137de47283 100644 (file)
--- 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;

diff --git a/sim/m32c/syscall.h b/sim/m32c/syscall.h
new file mode 100644 (file)
index 0000000..0194e03
--- /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

diff --git a/sim/m32c/syscalls.c b/sim/m32c/syscalls.c
index bf33c1d8b6ded27f65ef1cc88f3b44cc90a35fe3..0a1c249fc8baa838072fbcfc8e3bda0fd0fbfbe8 100644 (file)
--- 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;