1 files changed, 631 insertions, 0 deletions

diff --git a/src/plugins/old/convert_numeric.c b/src/plugins/old/convert_numeric.c
new file mode 100644
index 0000000..b345014
--- /dev/null
+++ b/src/plugins/old/convert_numeric.c
@@ -0,0 +1,631 @@
+/* IEEE floating point support routines, for GDB, the GNU Debugger.
+   Copyright 1991, 1994, 1999, 2000, 2003, 2005, 2006
+   Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+/* This is needed to pick up the NAN macro on some systems.  */
+/* #define _GNU_SOURCE */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <math.h>
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+/* On some platforms, <float.h> provides DBL_QNAN.  */
+#ifdef STDC_HEADERS
+#include <float.h>
+#endif
+
+/*#include "ansidecl.h"*/
+/*#include "libiberty.h"*/
+#include "convert_numeric.h"
+
+#ifndef INFINITY
+#ifdef HUGE_VAL
+#define INFINITY HUGE_VAL
+#else
+#define INFINITY (1.0 / 0.0)
+#endif
+#endif
+
+#ifndef NAN
+#ifdef DBL_QNAN
+#define NAN DBL_QNAN
+#else
+#define NAN (0.0 / 0.0)
+#endif
+#endif
+
+static unsigned long get_field (const unsigned char *,
+                                enum EXTRACTOR_floatformat_byteorders,
+                                unsigned int,
+                                unsigned int,
+                                unsigned int);
+static int floatformat_always_valid (const struct EXTRACTOR_floatformat *fmt,
+                                     const void *from);
+
+static int
+floatformat_always_valid (const struct EXTRACTOR_floatformat *fmt /*ATTRIBUTE_UNUSED*/,
+                          const void *from /*ATTRIBUTE_UNUSED*/)
+{
+  return 1;
+}
+
+/* The odds that CHAR_BIT will be anything but 8 are low enough that I'm not
+   going to bother with trying to muck around with whether it is defined in
+   a system header, what we do if not, etc.  */
+#define FLOATFORMAT_CHAR_BIT 8
+
+/* floatformats for IEEE single and double, big and little endian.  */
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ieee_single_big =
+{
+  floatformat_big, 32, 0, 1, 8, 127, 255, 9, 23,
+  floatformat_intbit_no,
+  "floatformat_ieee_single_big",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ieee_single_little =
+{
+  floatformat_little, 32, 0, 1, 8, 127, 255, 9, 23,
+  floatformat_intbit_no,
+  "floatformat_ieee_single_little",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ieee_double_big =
+{
+  floatformat_big, 64, 0, 1, 11, 1023, 2047, 12, 52,
+  floatformat_intbit_no,
+  "floatformat_ieee_double_big",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ieee_double_little =
+{
+  floatformat_little, 64, 0, 1, 11, 1023, 2047, 12, 52,
+  floatformat_intbit_no,
+  "floatformat_ieee_double_little",
+  floatformat_always_valid
+};
+
+/* floatformat for IEEE double, little endian byte order, with big endian word
+   ordering, as on the ARM.  */
+
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ieee_double_littlebyte_bigword =
+{
+  floatformat_littlebyte_bigword, 64, 0, 1, 11, 1023, 2047, 12, 52,
+  floatformat_intbit_no,
+  "floatformat_ieee_double_littlebyte_bigword",
+  floatformat_always_valid
+};
+
+/* floatformat for VAX.  Not quite IEEE, but close enough.  */
+
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_vax_f =
+{
+  floatformat_vax, 32, 0, 1, 8, 129, 0, 9, 23,
+  floatformat_intbit_no,
+  "floatformat_vax_f",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_vax_d =
+{
+  floatformat_vax, 64, 0, 1, 8, 129, 0, 9, 55,
+  floatformat_intbit_no,
+  "floatformat_vax_d",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_vax_g =
+{
+  floatformat_vax, 64, 0, 1, 11, 1025, 0, 12, 52,
+  floatformat_intbit_no,
+  "floatformat_vax_g",
+  floatformat_always_valid
+};
+
+static int floatformat_i387_ext_is_valid (const struct EXTRACTOR_floatformat *fmt,
+                                          const void *from);
+
+static int
+floatformat_i387_ext_is_valid (const struct EXTRACTOR_floatformat *fmt, const void *from)
+{
+  /* In the i387 double-extended format, if the exponent is all ones,
+     then the integer bit must be set.  If the exponent is neither 0
+     nor ~0, the intbit must also be set.  Only if the exponent is
+     zero can it be zero, and then it must be zero.  */
+  unsigned long exponent, int_bit;
+  const unsigned char *ufrom = (const unsigned char *) from;
+
+  exponent = get_field (ufrom, fmt->byteorder, fmt->totalsize,
+                        fmt->exp_start, fmt->exp_len);
+  int_bit = get_field (ufrom, fmt->byteorder, fmt->totalsize,
+                       fmt->man_start, 1);
+
+  if ((exponent == 0) != (int_bit == 0))
+    return 0;
+  else
+    return 1;
+}
+
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_i387_ext =
+{
+  floatformat_little, 80, 0, 1, 15, 0x3fff, 0x7fff, 16, 64,
+  floatformat_intbit_yes,
+  "floatformat_i387_ext",
+  floatformat_i387_ext_is_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_m68881_ext =
+{
+  /* Note that the bits from 16 to 31 are unused.  */
+  floatformat_big, 96, 0, 1, 15, 0x3fff, 0x7fff, 32, 64,
+  floatformat_intbit_yes,
+  "floatformat_m68881_ext",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_i960_ext =
+{
+  /* Note that the bits from 0 to 15 are unused.  */
+  floatformat_little, 96, 16, 17, 15, 0x3fff, 0x7fff, 32, 64,
+  floatformat_intbit_yes,
+  "floatformat_i960_ext",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_m88110_ext =
+{
+  floatformat_big, 80, 0, 1, 15, 0x3fff, 0x7fff, 16, 64,
+  floatformat_intbit_yes,
+  "floatformat_m88110_ext",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_m88110_harris_ext =
+{
+  /* Harris uses raw format 128 bytes long, but the number is just an ieee
+     double, and the last 64 bits are wasted. */
+  floatformat_big,128, 0, 1, 11,  0x3ff,  0x7ff, 12, 52,
+  floatformat_intbit_no,
+  "floatformat_m88110_ext_harris",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_arm_ext_big =
+{
+  /* Bits 1 to 16 are unused.  */
+  floatformat_big, 96, 0, 17, 15, 0x3fff, 0x7fff, 32, 64,
+  floatformat_intbit_yes,
+  "floatformat_arm_ext_big",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_arm_ext_littlebyte_bigword =
+{
+  /* Bits 1 to 16 are unused.  */
+  floatformat_littlebyte_bigword, 96, 0, 17, 15, 0x3fff, 0x7fff, 32, 64,
+  floatformat_intbit_yes,
+  "floatformat_arm_ext_littlebyte_bigword",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ia64_spill_big =
+{
+  floatformat_big, 128, 0, 1, 17, 65535, 0x1ffff, 18, 64,
+  floatformat_intbit_yes,
+  "floatformat_ia64_spill_big",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ia64_spill_little =
+{
+  floatformat_little, 128, 0, 1, 17, 65535, 0x1ffff, 18, 64,
+  floatformat_intbit_yes,
+  "floatformat_ia64_spill_little",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ia64_quad_big =
+{
+  floatformat_big, 128, 0, 1, 15, 16383, 0x7fff, 16, 112,
+  floatformat_intbit_no,
+  "floatformat_ia64_quad_big",
+  floatformat_always_valid
+};
+const struct EXTRACTOR_floatformat EXTRACTOR_floatformat_ia64_quad_little =
+{
+  floatformat_little, 128, 0, 1, 15, 16383, 0x7fff, 16, 112,
+  floatformat_intbit_no,
+  "floatformat_ia64_quad_little",
+  floatformat_always_valid
+};
+
+
+#ifndef min
+#define min(a, b) ((a) < (b) ? (a) : (b))
+#endif
+
+/* Extract a field which starts at START and is LEN bits long.  DATA and
+   TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER.  */
+static unsigned long
+get_field (const unsigned char *data, enum EXTRACTOR_floatformat_byteorders order,
+           unsigned int total_len, unsigned int start, unsigned int len)
+{
+  unsigned long result = 0;
+  unsigned int cur_byte;
+  int lo_bit, hi_bit, cur_bitshift = 0;
+  int nextbyte = (order == floatformat_little) ? 1 : -1;
+
+  /* Start is in big-endian bit order!  Fix that first.  */
+  start = total_len - (start + len);
+
+  /* Start at the least significant part of the field.  */
+  if (order == floatformat_little)
+    cur_byte = start / FLOATFORMAT_CHAR_BIT;
+  else
+    cur_byte = (total_len - start - 1) / FLOATFORMAT_CHAR_BIT;
+
+  lo_bit = start % FLOATFORMAT_CHAR_BIT;
+  hi_bit = min (lo_bit + len, FLOATFORMAT_CHAR_BIT);
+
+  do
+    {
+      unsigned int shifted = *(data + cur_byte) >> lo_bit;
+      unsigned int bits = hi_bit - lo_bit;
+      unsigned int mask = (1 << bits) - 1;
+      result |= (shifted & mask) << cur_bitshift;
+      len -= bits;
+      cur_bitshift += bits;
+      cur_byte += nextbyte;
+      lo_bit = 0;
+      hi_bit = min (len, FLOATFORMAT_CHAR_BIT);
+    }
+  while (len != 0);
+
+  return result;
+}
+
+/* Convert from FMT to a double.
+   FROM is the address of the extended float.
+   Store the double in *TO.  */
+
+void
+EXTRACTOR_common_floatformat_to_double (const struct EXTRACTOR_floatformat *fmt,
+                       const void *from, double *to)
+{
+  const unsigned char *ufrom = (const unsigned char *) from;
+  double dto;
+  long exponent;
+  unsigned long mant;
+  unsigned int mant_bits, mant_off;
+  int mant_bits_left;
+  int special_exponent;         /* It's a NaN, denorm or zero */
+
+  exponent = get_field (ufrom, fmt->byteorder, fmt->totalsize,
+                        fmt->exp_start, fmt->exp_len);
+
+  /* If the exponent indicates a NaN, we don't have information to
+     decide what to do.  So we handle it like IEEE, except that we
+     don't try to preserve the type of NaN.  FIXME.  */
+  if ((unsigned long) exponent == fmt->exp_nan)
+    {
+      int nan;
+
+      mant_off = fmt->man_start;
+      mant_bits_left = fmt->man_len;
+      nan = 0;
+      while (mant_bits_left > 0)
+        {
+          mant_bits = min (mant_bits_left, 32);
+
+          if (get_field (ufrom, fmt->byteorder, fmt->totalsize,
+                         mant_off, mant_bits) != 0)
+            {
+              /* This is a NaN.  */
+              nan = 1;
+              break;
+            }
+
+          mant_off += mant_bits;
+          mant_bits_left -= mant_bits;
+        }
+
+      /* On certain systems (such as GNU/Linux), the use of the
+         INFINITY macro below may generate a warning that can not be
+         silenced due to a bug in GCC (PR preprocessor/11931).  The
+         preprocessor fails to recognise the __extension__ keyword in
+         conjunction with the GNU/C99 extension for hexadecimal
+         floating point constants and will issue a warning when
+         compiling with -pedantic.  */
+      if (nan)
+        dto = NAN;
+      else
+        dto = INFINITY;
+
+      if (get_field (ufrom, fmt->byteorder, fmt->totalsize, fmt->sign_start, 1))
+        dto = -dto;
+
+      *to = dto;
+
+      return;
+    }
+
+  mant_bits_left = fmt->man_len;
+  mant_off = fmt->man_start;
+  dto = 0.0;
+
+  special_exponent = (exponent == 0) || ((unsigned long) exponent == fmt->exp_nan);
+
+  /* Don't bias zero's, denorms or NaNs.  */
+  if (!special_exponent)
+    exponent -= fmt->exp_bias;
+
+  /* Build the result algebraically.  Might go infinite, underflow, etc;
+     who cares. */
+
+  /* If this format uses a hidden bit, explicitly add it in now.  Otherwise,
+     increment the exponent by one to account for the integer bit.  */
+
+  if (!special_exponent)
+    {
+      if (fmt->intbit == floatformat_intbit_no)
+        dto = ldexp (1.0, exponent);
+      else
+        exponent++;
+    }
+
+  while (mant_bits_left > 0)
+    {
+      mant_bits = min (mant_bits_left, 32);
+
+      mant = get_field (ufrom, fmt->byteorder, fmt->totalsize,
+                         mant_off, mant_bits);
+
+      /* Handle denormalized numbers.  FIXME: What should we do for
+         non-IEEE formats?  */
+      if (special_exponent && exponent == 0 && mant != 0)
+        dto += ldexp ((double)mant,
+                      (- fmt->exp_bias
+                       - mant_bits
+                       - (mant_off - fmt->man_start)
+                       + 1));
+      else
+        dto += ldexp ((double)mant, exponent - mant_bits);
+      if (exponent != 0)
+        exponent -= mant_bits;
+      mant_off += mant_bits;
+      mant_bits_left -= mant_bits;
+    }
+
+  /* Negate it if negative.  */
+  if (get_field (ufrom, fmt->byteorder, fmt->totalsize, fmt->sign_start, 1))
+    dto = -dto;
+  *to = dto;
+}
+
+static void put_field (unsigned char *, enum EXTRACTOR_floatformat_byteorders,
+                       unsigned int,
+                       unsigned int,
+                       unsigned int,
+                       unsigned long);
+
+/* Set a field which starts at START and is LEN bits long.  DATA and
+   TOTAL_LEN are the thing we are extracting it from, in byteorder ORDER.  */
+static void
+put_field (unsigned char *data, enum EXTRACTOR_floatformat_byteorders order,
+           unsigned int total_len, unsigned int start, unsigned int len,
+           unsigned long stuff_to_put)
+{
+  unsigned int cur_byte;
+  int lo_bit, hi_bit;
+  int nextbyte = (order == floatformat_little) ? 1 : -1;
+
+  /* Start is in big-endian bit order!  Fix that first.  */
+  start = total_len - (start + len);
+
+  /* Start at the least significant part of the field.  */
+  if (order == floatformat_little)
+    cur_byte = start / FLOATFORMAT_CHAR_BIT;
+  else
+    cur_byte = (total_len - start - 1) / FLOATFORMAT_CHAR_BIT;
+
+  lo_bit = start % FLOATFORMAT_CHAR_BIT;
+  hi_bit = min (lo_bit + len, FLOATFORMAT_CHAR_BIT);
+
+  do
+    {
+      unsigned char *byte_ptr = data + cur_byte;
+      unsigned int bits = hi_bit - lo_bit;
+      unsigned int mask = ((1 << bits) - 1) << lo_bit;
+      *byte_ptr = (*byte_ptr & ~mask) | ((stuff_to_put << lo_bit) & mask);
+      stuff_to_put >>= bits;
+      len -= bits;
+      cur_byte += nextbyte;
+      lo_bit = 0;
+      hi_bit = min (len, FLOATFORMAT_CHAR_BIT);
+    }
+  while (len != 0);
+}
+
+/* The converse: convert the double *FROM to an extended float
+   and store where TO points.  Neither FROM nor TO have any alignment
+   restrictions.  */
+
+void
+EXTRACTOR_common_floatformat_from_double (const struct EXTRACTOR_floatformat *fmt,
+                         const double *from, void *to)
+{
+  double dfrom;
+  int exponent;
+  double mant;
+  unsigned int mant_bits, mant_off;
+  int mant_bits_left;
+  unsigned char *uto = (unsigned char *) to;
+
+  dfrom = *from;
+  memset (uto, 0, fmt->totalsize / FLOATFORMAT_CHAR_BIT);
+
+  /* If negative, set the sign bit.  */
+  if (dfrom < 0)
+    {
+      put_field (uto, fmt->byteorder, fmt->totalsize, fmt->sign_start, 1, 1);
+      dfrom = -dfrom;
+    }
+
+  if (dfrom == 0)
+    {
+      /* 0.0.  */
+      return;
+    }
+
+  if (dfrom != dfrom)
+    {
+      /* NaN.  */
+      put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start,
+                 fmt->exp_len, fmt->exp_nan);
+      /* Be sure it's not infinity, but NaN value is irrelevant.  */
+      put_field (uto, fmt->byteorder, fmt->totalsize, fmt->man_start,
+                 32, 1);
+      return;
+    }
+
+  if (dfrom + dfrom == dfrom)
+    {
+      /* This can only happen for an infinite value (or zero, which we
+         already handled above).  */
+      put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start,
+                 fmt->exp_len, fmt->exp_nan);
+      return;
+    }
+
+  mant = frexp (dfrom, &exponent);
+  if (exponent + fmt->exp_bias - 1 > 0)
+    put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start,
+               fmt->exp_len, exponent + fmt->exp_bias - 1);
+  else
+    {
+      /* Handle a denormalized number.  FIXME: What should we do for
+         non-IEEE formats?  */
+      put_field (uto, fmt->byteorder, fmt->totalsize, fmt->exp_start,
+                 fmt->exp_len, 0);
+      mant = ldexp (mant, exponent + fmt->exp_bias - 1);
+    }
+
+  mant_bits_left = fmt->man_len;
+  mant_off = fmt->man_start;
+  while (mant_bits_left > 0)
+    {
+      unsigned long mant_long;
+      mant_bits = mant_bits_left < 32 ? mant_bits_left : 32;
+
+      mant *= 4294967296.0;
+      mant_long = (unsigned long)mant;
+      mant -= mant_long;
+
+      /* If the integer bit is implicit, and we are not creating a
+         denormalized number, then we need to discard it.  */
+      if ((unsigned int) mant_bits_left == fmt->man_len
+          && fmt->intbit == floatformat_intbit_no
+          && exponent + fmt->exp_bias - 1 > 0)
+        {
+          mant_long &= 0x7fffffff;
+          mant_bits -= 1;
+        }
+      else if (mant_bits < 32)
+        {
+          /* The bits we want are in the most significant MANT_BITS bits of
+             mant_long.  Move them to the least significant.  */
+          mant_long >>= 32 - mant_bits;
+        }
+
+      put_field (uto, fmt->byteorder, fmt->totalsize,
+                 mant_off, mant_bits, mant_long);
+      mant_off += mant_bits;
+      mant_bits_left -= mant_bits;
+    }
+}
+
+/* Return non-zero iff the data at FROM is a valid number in format FMT.  */
+
+int
+EXTRACTOR_common_floatformat_is_valid (const struct EXTRACTOR_floatformat *fmt, const void *from)
+{
+  return fmt->is_valid (fmt, from);
+}
+
+
+#ifdef IEEE_DEBUG
+
+#include <stdio.h>
+
+/* This is to be run on a host which uses IEEE floating point.  */
+
+void
+ieee_test (double n)
+{
+  double result;
+
+  floatformat_to_double (&floatformat_ieee_double_little, &n, &result);
+  if ((n != result && (! isnan (n) || ! isnan (result)))
+      || (n < 0 && result >= 0)
+      || (n >= 0 && result < 0))
+    printf ("Differ(to): %.20g -> %.20g\n", n, result);
+
+  floatformat_from_double (&floatformat_ieee_double_little, &n, &result);
+  if ((n != result && (! isnan (n) || ! isnan (result)))
+      || (n < 0 && result >= 0)
+      || (n >= 0 && result < 0))
+    printf ("Differ(from): %.20g -> %.20g\n", n, result);
+
+#if 0
+  {
+    char exten[16];
+
+    floatformat_from_double (&floatformat_m68881_ext, &n, exten);
+    floatformat_to_double (&floatformat_m68881_ext, exten, &result);
+    if (n != result)
+      printf ("Differ(to+from): %.20g -> %.20g\n", n, result);
+  }
+#endif
+
+#if IEEE_DEBUG > 1
+  /* This is to be run on a host which uses 68881 format.  */
+  {
+    long double ex = *(long double *)exten;
+    if (ex != n)
+      printf ("Differ(from vs. extended): %.20g\n", n);
+  }
+#endif
+}
+
+int
+main (void)
+{
+  ieee_test (0.0);
+  ieee_test (0.5);
+  ieee_test (256.0);
+  ieee_test (0.12345);
+  ieee_test (234235.78907234);
+  ieee_test (-512.0);
+  ieee_test (-0.004321);
+  ieee_test (1.2E-70);
+  ieee_test (1.2E-316);
+  ieee_test (4.9406564584124654E-324);
+  ieee_test (- 4.9406564584124654E-324);
+  ieee_test (- 0.0);
+  ieee_test (- INFINITY);
+  ieee_test (- NAN);
+  ieee_test (INFINITY);
+  ieee_test (NAN);
+  return 0;
+}
+#endif