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-rw-r--r--gdb/i387-tdep.c281
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 */
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