import gdb-1999-09-08 snapshot

1 files changed, 235 insertions, 46 deletions

diff --git a/gdb/i387-tdep.c b/gdb/i387-tdep.c
index 253bc26..0621bdf 100644
--- a/gdb/i387-tdep.c
+++ b/gdb/i387-tdep.c
@@ -22,13 +22,16 @@
 #include "frame.h"
 #include "inferior.h"
 #include "language.h"
+#include "value.h"
 #include "gdbcore.h"
 #include "floatformat.h"
 
 void i387_to_double PARAMS ((char *, char *));
-
 void double_to_i387 PARAMS ((char *, char *));
 
+static void print_387_control_bits PARAMS ((unsigned int control));
+static void print_387_status_bits  PARAMS ((unsigned int status));
+
 /* FIXME:  Eliminate these routines when we have the time to change all
    the callers.  */
 
@@ -48,95 +51,281 @@ double_to_i387 (from, to)
   floatformat_from_double (&floatformat_i387_ext, (double *) from, to);
 }
 
-void
-print_387_control_word (control)
+static void
+print_387_control_bits (control)
      unsigned int control;
 {
-  printf_unfiltered ("control %s: ", local_hex_string (control));
-  printf_unfiltered ("compute to ");
   switch ((control >> 8) & 3)
     {
     case 0:
-      printf_unfiltered ("24 bits; ");
+      puts_unfiltered (" 24 bit; ");
       break;
     case 1:
-      printf_unfiltered ("(bad); ");
+      puts_unfiltered (" (bad); ");
       break;
     case 2:
-      printf_unfiltered ("53 bits; ");
+      puts_unfiltered (" 53 bit; ");
       break;
     case 3:
-      printf_unfiltered ("64 bits; ");
+      puts_unfiltered (" 64 bit; ");
       break;
     }
-  printf_unfiltered ("round ");
   switch ((control >> 10) & 3)
     {
     case 0:
-      printf_unfiltered ("NEAREST; ");
+      puts_unfiltered ("NEAR; ");
       break;
     case 1:
-      printf_unfiltered ("DOWN; ");
+      puts_unfiltered ("DOWN; ");
       break;
     case 2:
-      printf_unfiltered ("UP; ");
+      puts_unfiltered ("UP; ");
       break;
     case 3:
-      printf_unfiltered ("CHOP; ");
+      puts_unfiltered ("CHOP; ");
       break;
     }
   if (control & 0x3f)
     {
-      printf_unfiltered ("mask:");
+      puts_unfiltered ("mask");
       if (control & 0x0001)
-	printf_unfiltered (" INVALID");
+	puts_unfiltered (" INVAL");
       if (control & 0x0002)
-	printf_unfiltered (" DENORM");
+	puts_unfiltered (" DENOR");
       if (control & 0x0004)
-	printf_unfiltered (" DIVZ");
+	puts_unfiltered (" DIVZ");
       if (control & 0x0008)
-	printf_unfiltered (" OVERF");
+	puts_unfiltered (" OVERF");
       if (control & 0x0010)
-	printf_unfiltered (" UNDERF");
+	puts_unfiltered (" UNDER");
       if (control & 0x0020)
-	printf_unfiltered (" LOS");
-      printf_unfiltered (";");
+	puts_unfiltered (" LOS");
+      puts_unfiltered (";");
     }
   printf_unfiltered ("\n");
   if (control & 0xe080)
-    warning ("reserved bits on: %s\n",
+    warning ("\nreserved bits on: %s",
 	     local_hex_string (control & 0xe080));
 }
 
 void
-print_387_status_word (status)
+print_387_control_word (control)
+     unsigned int control;
+{
+  printf_filtered ("control %s:", local_hex_string(control & 0xffff));
+  print_387_control_bits (control);
+  puts_unfiltered ("\n");
+}
+
+static void
+print_387_status_bits (status)
      unsigned int status;
 {
-  printf_unfiltered ("status %s: ", local_hex_string (status));
-  if (status & 0xff)
-    {
-      printf_unfiltered ("exceptions:");
-      if (status & 0x0001)
-	printf_unfiltered (" INVALID");
-      if (status & 0x0002)
-	printf_unfiltered (" DENORM");
-      if (status & 0x0004)
-	printf_unfiltered (" DIVZ");
-      if (status & 0x0008)
-	printf_unfiltered (" OVERF");
-      if (status & 0x0010)
-	printf_unfiltered (" UNDERF");
-      if (status & 0x0020)
-	printf_unfiltered (" LOS");
-      if (status & 0x0040)
-	printf_unfiltered (" FPSTACK");
-      printf_unfiltered ("; ");
-    }
-  printf_unfiltered ("flags: %d%d%d%d; ",
+  printf_unfiltered (" flags %d%d%d%d; ",
 		     (status & 0x4000) != 0,
 		     (status & 0x0400) != 0,
 		     (status & 0x0200) != 0,
 		     (status & 0x0100) != 0);
+  printf_unfiltered ("top %d; ", (status >> 11) & 7);
+  if (status & 0xff) 
+    {
+      puts_unfiltered ("excep");
+      if (status & 0x0001) puts_unfiltered (" INVAL");
+      if (status & 0x0002) puts_unfiltered (" DENOR");
+      if (status & 0x0004) puts_unfiltered (" DIVZ");
+      if (status & 0x0008) puts_unfiltered (" OVERF");
+      if (status & 0x0010) puts_unfiltered (" UNDER");
+      if (status & 0x0020) puts_unfiltered (" LOS");
+      if (status & 0x0040) puts_unfiltered (" STACK");
+    }
+}
+
+void
+print_387_status_word (status)
+     unsigned int status;
+{
+  printf_filtered ("status %s:", local_hex_string (status & 0xffff));
+  print_387_status_bits (status);
+  puts_unfiltered ("\n");
+}
+
+void
+i387_print_register (raw_regs, regnum)
+     char *raw_regs;
+     int regnum;
+{
+  unsigned char virtual_buffer[MAX_REGISTER_VIRTUAL_SIZE];
+  unsigned long val;
+  int j, sign, special;
+  unsigned swd, tags, expon, top, norm, ls, ms;
+  char string[12];
+
+#if (FPREG_RAW_SIZE != 10)
+#error "Bad FPREG_RAW_SIZE"
+#endif
+
+  printf_filtered ("%8.8s: ", REGISTER_NAME (regnum));
+  if (regnum < FPDATA_REGNUM)
+    {
+      val = extract_unsigned_integer (raw_regs + REGISTER_BYTE (regnum), 4);
+      if ( (regnum < FPSTART_REGNUM + 3) ||
+	   (regnum == FPSTART_REGNUM + 6) )
+	/* Don't print the un-modifiable bytes. */
+	sprintf(string, "0x%04x", val & 0xffff);
+      else
+	sprintf(string, "0x%08x", val);
+
+      printf_unfiltered ("%10.10s", string);
 
-  printf_unfiltered ("top %d\n", (status >> 11) & 7);
+      if (regnum == FPCONTROL_REGNUM)
+	print_387_control_bits (val);
+      else if (regnum == FPSTATUS_REGNUM)
+	print_387_status_bits (val);
+    }
+  else
+    {
+      /* An FPU stack register. */
+      if ( REGISTER_RAW_SIZE (regnum) != FPREG_RAW_SIZE )
+	error ("GDB bug: i387-tdep.c (i387_print_register): wrong size for FPU stack register");
+
+      /* Put the data in the buffer.  No conversions are ever necessary. */
+      memcpy (virtual_buffer, raw_regs + REGISTER_BYTE (regnum),
+	      FPREG_RAW_SIZE);
+
+      swd = extract_signed_integer (raw_regs + REGISTER_BYTE (FPSTATUS_REGNUM),
+				    4);
+      top = (swd >> 11) & 7;
+      tags = extract_signed_integer (raw_regs + REGISTER_BYTE (FPTAG_REGNUM),
+				     4);
+
+      puts_unfiltered ("0x");
+      for (j = 0; j < FPREG_RAW_SIZE; j++)
+	printf_unfiltered ("%02x",
+			   (unsigned char)raw_regs[REGISTER_BYTE (regnum)
+						  + FPREG_RAW_SIZE - 1 - j]);
+      
+      puts_unfiltered ("  ");
+      special = 0;
+      switch ((tags >> (((regnum - FPDATA_REGNUM + top) & 7) * 2)) & 3) 
+	{
+	case 0: puts_unfiltered ("Valid "); break;
+	case 1: puts_unfiltered ("Zero  "); break;
+	case 2: puts_unfiltered ("Spec  ");
+	  special = 1;
+	  break;
+	case 3: puts_unfiltered ("Empty "); break;
+	}
+
+      expon = extract_unsigned_integer (raw_regs + REGISTER_BYTE (regnum)
+					+ FPREG_RAW_SIZE - 2, 2);
+      sign = expon & 0x8000;
+      expon &= 0x7fff;
+      ms = extract_unsigned_integer (raw_regs + REGISTER_BYTE (regnum) + 4, 4);
+      ls = extract_signed_integer (raw_regs + REGISTER_BYTE (regnum), 4);
+      norm = ms & 0x80000000;
+
+      if ( expon == 0 )
+	{
+	  if ( ms | ls )
+	    {
+	      /* Denormal or Pseudodenormal. */
+	      if ( norm )
+		puts_unfiltered ("Pseudo ");
+	      else
+		puts_unfiltered ("Denorm ");
+	    }
+	  else
+	    {
+	      /* Zero. */
+	      puts_unfiltered ("Zero   ");
+	    }
+	}
+      else if ( expon == 0x7fff )
+	{
+	  /* Infinity, NaN or unsupported. */
+	  if ( (ms == 0x80000000) &&
+	       (ls == 0) )
+	    {
+              puts_unfiltered ("Infty  ");
+	    }
+	  else if ( norm )
+	    {
+	      if ( ms & 0x40000000 )
+		puts_unfiltered ("QNaN   ");
+	      else
+		puts_unfiltered ("SNaN   ");
+	    }
+	  else
+	    {
+              puts_unfiltered ("Unsupp ");
+	    }
+	}
+      else
+	{
+	  /* Normal or unsupported. */
+	  if ( norm )
+	    puts_unfiltered ("Normal ");
+	  else
+	    puts_unfiltered ("Unsupp ");
+	}
+
+      val_print (REGISTER_VIRTUAL_TYPE (regnum), virtual_buffer, 0, 0,
+		 gdb_stdout, 0,
+		 1, 0, Val_pretty_default);
+    }
+  puts_filtered ("\n");
+}
+
+void i387_float_info(void)
+{
+  char raw_regs [REGISTER_BYTES];
+  int i;
+
+  for (i = FPSTART_REGNUM; i <= FPEND_REGNUM; i++)
+    read_relative_register_raw_bytes (i, raw_regs + REGISTER_BYTE (i));
+
+  for (i = FPSTART_REGNUM; i <= FPEND_REGNUM; i++)
+    i387_print_register (raw_regs, i);
+}
+
+#ifdef LD_I387
+int
+i387_extract_floating (PTR addr, int len, DOUBLEST *dretptr)
+{
+  if (len == TARGET_LONG_DOUBLE_BIT / 8)
+    {
+      if (HOST_LONG_DOUBLE_FORMAT == TARGET_LONG_DOUBLE_FORMAT)
+	{
+	  DOUBLEST retval;
+
+	  memcpy (dretptr, addr, sizeof (retval));
+	}
+      else
+	floatformat_to_doublest (TARGET_LONG_DOUBLE_FORMAT, addr, dretptr);
+
+      return 1;
+    }
+  else
+    return 0;
+}
+
+int
+i387_store_floating (PTR addr, int len, DOUBLEST val)
+{
+  if (len == TARGET_LONG_DOUBLE_BIT / 8)
+    {
+      /* This `if' may be totally stupid.  I just put it in here to be
+	 absolutely sure I'm preserving the semantics of the code I'm
+	 frobbing, while I try to maintain portability boundaries; I
+	 don't actually know exactly what it's doing.  -JimB, May 1999 */
+      if (HOST_LONG_DOUBLE_FORMAT == TARGET_LONG_DOUBLE_FORMAT)
+	memcpy (addr, &val, sizeof (val));
+      else
+	floatformat_from_doublest (TARGET_LONG_DOUBLE_FORMAT, &val, addr);
+
+      return 1;
+    }
+  else
+    return 0;
 }
+#endif /* LD_I387 */