Thu Aug 1 17:05:24 1996 Martin M. Hunt <hunt@pizza.cygnus.com>

	* ChangeLog, Makefile.in, configure, configure.in, d10v_sim.h,
	gencode.c, interp.c, simops.c: Created.

1 files changed, 345 insertions, 0 deletions

diff --git a/sim/d10v/interp.c b/sim/d10v/interp.c
new file mode 100644
index 0000000..279a6cb
--- /dev/null
+++ b/sim/d10v/interp.c
@@ -0,0 +1,345 @@
+#include "sysdep.h"
+#include "bfd.h"
+#include "remote-sim.h"
+#include "callback.h"
+
+#include "d10v_sim.h"
+
+#define IMEM_SIZE 18	/* D10V instruction memory size is 18 bits */
+#define DMEM_SIZE 16	/* Data memory */
+
+uint16 OP[4];
+
+static struct hash_entry *lookup_hash PARAMS ((uint32 ins, int size));
+
+#define MAX_HASH  63
+struct hash_entry
+{
+  struct hash_entry *next;
+  long opcode;
+  long mask;
+  struct simops *ops;
+};
+
+struct hash_entry hash_table[MAX_HASH+1];
+
+static long 
+hash(insn, format)
+     long insn;
+     int format;
+{
+  if (format & LONG_OPCODE)
+    return ((insn & 0x3F000000) >> 24);
+  else
+    return((insn & 0x7E00) >> 9);
+}
+
+static struct hash_entry *
+lookup_hash (ins, size)
+     uint32 ins;
+     int size;
+{
+  struct hash_entry *h;
+
+  if (size)
+    h = &hash_table[(ins & 0x3F000000) >> 24];
+  else
+    h = &hash_table[(ins & 0x7E00) >> 9];
+
+  while ( (ins & h->mask) != h->opcode)
+    {
+      if (h->next == NULL)
+	{
+	  printf ("ERROR looking up hash for %x\n",ins);
+	  exit(1);
+	}
+      h = h->next;
+    }
+  return (h);
+}
+
+uint32
+get_longword_swap (x)
+      uint16 x;
+{
+  uint8 *a = (uint8 *)(x + State.imem);
+  return (a[0]<<24) + (a[1]<<16) + (a[2]<<8) + (a[3]);
+}
+
+uint16
+get_word_swap (x)
+      uint16 x;
+{
+  uint8 *a = (uint8 *)(x + State.imem);
+  return (a[0]<<8) + a[1];
+}
+
+void
+write_word_swap (addr, data)
+     uint16 addr, data;
+{
+  uint8 *a = (uint8 *)(addr + State.imem);
+  a[0] = data >> 8;
+  a[1] = data & 0xff;
+}
+
+
+static void
+get_operands (struct simops *s, uint32 ins)
+{
+  int i, shift, bits, flags;
+  uint32 mask;
+  for (i=0; i < s->numops; i++)
+    {
+      shift = s->operands[3*i];
+      bits = s->operands[3*i+1];
+      flags = s->operands[3*i+2];
+      mask = 0x7FFFFFFF >> (31 - bits);
+      OP[i] = (ins >> shift) & mask;
+    }
+}
+
+static void
+do_long (ins)
+     uint32 ins;
+{
+  struct hash_entry *h;
+  /*  printf ("do_long %x\n",ins); */
+  h = lookup_hash (ins, 1);
+  get_operands (h->ops, ins);
+  (h->ops->func)();
+}
+static void
+do_2_short (ins1, ins2)
+     uint16 ins1, ins2;
+{
+  struct hash_entry *h;
+  /*  printf ("do_2_short %x -> %x\n",ins1,ins2); */
+  h = lookup_hash (ins1, 0);
+  get_operands (h->ops, ins1);
+  (h->ops->func)();
+  h = lookup_hash (ins2, 0);
+  get_operands (h->ops, ins2);
+  (h->ops->func)();
+}
+static void
+do_parallel (ins1, ins2)
+     uint16 ins1, ins2;
+{
+  struct hash_entry *h1, *h2;
+  /*  printf ("do_parallel %x || %x\n",ins1,ins2); */
+  h1 = lookup_hash (ins1, 0);
+  get_operands (h1->ops, ins1);
+  h2 = lookup_hash (ins2, 0);
+  get_operands (h2->ops, ins2);
+  if (h1->ops->exec_type == PARONLY)
+    {
+      (h1->ops->func)();
+      if (State.exe)
+	(h2->ops->func)();
+    }
+  else if (h2->ops->exec_type == PARONLY)
+    {
+      (h2->ops->func)();
+      if (State.exe)
+	(h1->ops->func)();
+    }
+  else
+    {
+      (h1->ops->func)();
+      (h2->ops->func)();
+    }
+}
+ 
+
+void
+sim_size (power)
+     int power;
+
+{
+  if (State.imem)
+    {
+      free (State.imem);
+      free (State.dmem);
+    }
+
+  State.imem = (uint8 *)calloc(1,1<<IMEM_SIZE);
+  State.dmem = (uint8 *)calloc(1,1<<DMEM_SIZE);
+  if (!State.imem || !State.dmem )
+    {
+      fprintf (stderr,"Memory allocation failed.\n");
+      exit(1);
+    }
+  printf ("Allocated %d bytes instruction memory and\n",1<<IMEM_SIZE);
+  printf ("          %d bytes data memory.\n",1<<DMEM_SIZE);
+}
+
+static void
+init_system ()
+{
+  if (!State.imem)
+    sim_size(1);
+}
+
+int
+sim_write (addr, buffer, size)
+     SIM_ADDR addr;
+     unsigned char *buffer;
+     int size;
+{
+  int i;
+  init_system ();
+
+  printf ("sim_write %d bytes to 0x%x\n",size,addr);
+  for (i = 0; i < size; i++)
+    {
+      State.imem[i+addr] = buffer[i]; 
+    }
+  return size;
+}
+
+void
+sim_open (args)
+     char *args;
+{
+  struct simops *s;
+  struct hash_entry *h, *prev;
+  if (args != NULL)
+      printf ("sim_open %s\n",args);
+
+  /* put all the opcodes in the hash table */
+  for (s = Simops; s->func; s++)
+    {
+      h = &hash_table[hash(s->opcode,s->format)];
+      
+      /* go to the last entry in the chain */
+      while (h->next)
+	  h = h->next;
+
+      if (h->ops)
+	{
+	  h->next = calloc(1,sizeof(struct hash_entry));
+	  h = h->next;
+	}
+      h->ops = s;
+      h->mask = s->mask;
+      h->opcode = s->opcode;
+    }
+}
+
+
+void
+sim_close (quitting)
+     int quitting;
+{
+  /* nothing to do */
+}
+
+void
+sim_set_profile (n)
+     int n;
+{
+  printf ("sim_set_profile %d\n",n);
+}
+
+void
+sim_set_profile_size (n)
+     int n;
+{
+  printf ("sim_set_profile_size %d\n",n);
+}
+
+void
+sim_resume (step, siggnal)
+     int step, siggnal;
+{
+  uint32 inst;
+  int i;
+  reg_t oldpc;
+
+  printf ("sim_resume %d %d\n",step,siggnal);
+
+  while (1)
+    {
+      inst = RLW (PC << 2);
+      oldpc = PC;
+      switch (inst & 0xC0000000)
+	{
+	case 0xC0000000:
+	  /* long instruction */
+	  do_long (inst & 0x3FFFFFFF);
+	  break;
+	case 0x80000000:
+	  /* R -> L */
+	  do_2_short ( inst & 0x7FFF, (inst & 0x3FFF8000) >> 15);
+	  break;
+	case 0x40000000:
+	  /* L -> R */
+	  do_2_short ((inst & 0x3FFF8000) >> 15, inst & 0x7FFF);
+	  break;
+	case 0:
+          do_parallel ((inst & 0x3FFF8000) >> 15, inst & 0x7FFF);
+          break;
+        }
+
+      if (State.RP && PC == RPT_E)
+	{
+	  RPT_C -= 1;
+	  if (RPT_C == 0)
+	    State.RP = 0;
+	  else
+	    PC = RPT_S;
+	}
+
+      /* FIXME */
+      if (PC == oldpc)
+	PC++;
+    }
+}
+
+int
+sim_trace ()
+{
+  printf ("sim_trace\n");
+  return 0;
+}
+
+void
+sim_info (verbose)
+     int verbose;
+{
+  printf ("sim_verbose\n");
+}
+
+void
+sim_create_inferior (start_address, argv, env)
+     SIM_ADDR start_address;
+     char **argv;
+     char **env;
+{
+  printf ("sim_create_inferior:  PC=0x%x\n",start_address);
+  PC = start_address >> 2;
+}
+
+
+void
+sim_kill ()
+{
+  /* nothing to do */
+}
+
+void
+sim_set_callbacks(p)
+     host_callback *p;
+{
+  printf ("sim_set_callbacks\n");
+  /* callback = p; */
+}
+
+void
+sim_stop_reason (reason, sigrc)
+     enum sim_stop *reason;
+     int *sigrc;
+{
+  printf ("sim_stop_reason\n");
+}