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/* This is a software decimal floating point library.

   Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.

This file is part of GCC.

GCC 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 3, or (at your option) any later

version.

GCC 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.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

/* This implements IEEE 754 decimal floating point arithmetic, but

   does not provide a mechanism for setting the rounding mode, or for

   generating or handling exceptions.  Conversions between decimal

   floating point types and other types depend on C library functions.

   Contributed by Ben Elliston  <bje@au.ibm.com>.  */

#include <stdio.h>

#include <stdlib.h>

/* FIXME: compile with -std=gnu99 to get these from stdlib.h */

extern float strtof (const char *, char **);

extern long double strtold (const char *, char **);

#include <string.h>

#include <limits.h>

#include "config/dfp-bit.h"

/* Forward declarations.  */

#if WIDTH == 32 || WIDTH_TO == 32

void __host_to_ieee_32 (_Decimal32 in, decimal32 *out);

void __ieee_to_host_32 (decimal32 in, _Decimal32 *out);

#endif

#if WIDTH == 64 || WIDTH_TO == 64

void __host_to_ieee_64 (_Decimal64 in, decimal64 *out);

void __ieee_to_host_64 (decimal64 in, _Decimal64 *out);

#endif

#if WIDTH == 128 || WIDTH_TO == 128

void __host_to_ieee_128 (_Decimal128 in, decimal128 *out);

void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);

#endif

/* A pointer to a binary decFloat operation.  */

typedef decFloat* (*dfp_binary_func)

     (decFloat *, const decFloat *, const decFloat *, decContext *);

/* Binary operations.  */

/* Use a decFloat (decDouble or decQuad) function to perform a DFP

   binary operation.  */

static inline decFloat

dfp_binary_op (dfp_binary_func op, decFloat arg_a, decFloat arg_b)

{

  decFloat result;

  decContext context;

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  /* Perform the operation.  */

  op (&result, &arg_a, &arg_b, &context);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    {

      /* decNumber exception flags we care about here.  */

      int ieee_flags;

      int dec_flags = DEC_IEEE_854_Division_by_zero | DEC_IEEE_854_Inexact

                      | DEC_IEEE_854_Invalid_operation | DEC_IEEE_854_Overflow

                      | DEC_IEEE_854_Underflow;

      dec_flags &= context.status;

      ieee_flags = DFP_IEEE_FLAGS (dec_flags);

      if (ieee_flags != 0)

        DFP_HANDLE_EXCEPTIONS (ieee_flags);

    }

  return result;

}

#if WIDTH == 32

/* The decNumber package doesn't provide arithmetic for decSingle (32 bits);

   convert to decDouble, use the operation for that, and convert back.  */

static inline _Decimal32

d32_binary_op (dfp_binary_func op, _Decimal32 arg_a, _Decimal32 arg_b)

{

  union { _Decimal32 c; decSingle f; } a32, b32, res32;

  decDouble a, b, res;

  decContext context;

  /* Widen the operands and perform the operation.  */

  a32.c = arg_a;

  b32.c = arg_b;

  decSingleToWider (&a32.f, &a);

  decSingleToWider (&b32.f, &b);

  res = dfp_binary_op (op, a, b);

  /* Narrow the result, which might result in an underflow or overflow.  */

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  decSingleFromWider (&res32.f, &res, &context);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    {

      /* decNumber exception flags we care about here.  */

      int ieee_flags;

      int dec_flags = DEC_IEEE_854_Inexact | DEC_IEEE_854_Overflow

                      | DEC_IEEE_854_Underflow;

      dec_flags &= context.status;

      ieee_flags = DFP_IEEE_FLAGS (dec_flags);

      if (ieee_flags != 0)

        DFP_HANDLE_EXCEPTIONS (ieee_flags);

    }

  return res32.c;

}

#else

/* decFloat operations are supported for decDouble (64 bits) and

   decQuad (128 bits).  The bit patterns for the types are the same.  */

static inline DFP_C_TYPE

dnn_binary_op (dfp_binary_func op, DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  union { DFP_C_TYPE c; decFloat f; } a, b, result;

  a.c = arg_a;

  b.c = arg_b;

  result.f = dfp_binary_op (op, a.f, b.f);

  return result.c;

}

#endif

/* Comparison operations.  */

/* Use a decFloat (decDouble or decQuad) function to perform a DFP

   comparison.  */

static inline CMPtype

dfp_compare_op (dfp_binary_func op, decFloat arg_a, decFloat arg_b)

{

  decContext context;

  decFloat res;

  int result;

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  /* Perform the comparison.  */

  op (&res, &arg_a, &arg_b, &context);

  if (DEC_FLOAT_IS_SIGNED (&res))

    result = -1;

  else if (DEC_FLOAT_IS_ZERO (&res))

    result = 0;

  else if (DEC_FLOAT_IS_NAN (&res))

    result = -2;

  else

    result = 1;

  return (CMPtype) result;

}

#if WIDTH == 32

/* The decNumber package doesn't provide comparisons for decSingle (32 bits);

   convert to decDouble, use the operation for that, and convert back.  */

static inline CMPtype

d32_compare_op (dfp_binary_func op, _Decimal32 arg_a, _Decimal32 arg_b)

{

  union { _Decimal32 c; decSingle f; } a32, b32;

  decDouble a, b;

  a32.c = arg_a;

  b32.c = arg_b;

  decSingleToWider (&a32.f, &a);

  decSingleToWider (&b32.f, &b);

  return dfp_compare_op (op, a, b);

}

#else

/* decFloat comparisons are supported for decDouble (64 bits) and

   decQuad (128 bits).  The bit patterns for the types are the same.  */

static inline CMPtype

dnn_compare_op (dfp_binary_func op, DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  union { DFP_C_TYPE c; decFloat f; } a, b;

  a.c = arg_a;

  b.c = arg_b;

  return dfp_compare_op (op, a.f, b.f);

}

#endif

#if defined(L_conv_sd)

void

__host_to_ieee_32 (_Decimal32 in, decimal32 *out)

{

  memcpy (out, &in, 4);

}

void

__ieee_to_host_32 (decimal32 in, _Decimal32 *out)

{

  memcpy (out, &in, 4);

}

#endif /* L_conv_sd */

#if defined(L_conv_dd)

void

__host_to_ieee_64 (_Decimal64 in, decimal64 *out)

{

  memcpy (out, &in, 8);

}

void

__ieee_to_host_64 (decimal64 in, _Decimal64 *out)

{

  memcpy (out, &in, 8);

}

#endif /* L_conv_dd */

#if defined(L_conv_td)

void

__host_to_ieee_128 (_Decimal128 in, decimal128 *out)

{

  memcpy (out, &in, 16);

}

void

__ieee_to_host_128 (decimal128 in, _Decimal128 *out)

{

  memcpy (out, &in, 16);

}

#endif /* L_conv_td */

#if defined(L_addsub_sd) || defined(L_addsub_dd) || defined(L_addsub_td)

DFP_C_TYPE

DFP_ADD (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  return DFP_BINARY_OP (DEC_FLOAT_ADD, arg_a, arg_b);

}

DFP_C_TYPE

DFP_SUB (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  return DFP_BINARY_OP (DEC_FLOAT_SUBTRACT, arg_a, arg_b);

}

#endif /* L_addsub */

#if defined(L_mul_sd) || defined(L_mul_dd) || defined(L_mul_td)

DFP_C_TYPE

DFP_MULTIPLY (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  return DFP_BINARY_OP (DEC_FLOAT_MULTIPLY, arg_a, arg_b);

}

#endif /* L_mul */

#if defined(L_div_sd) || defined(L_div_dd) || defined(L_div_td)

DFP_C_TYPE

DFP_DIVIDE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  return DFP_BINARY_OP (DEC_FLOAT_DIVIDE, arg_a, arg_b);

}

#endif /* L_div */

#if defined (L_eq_sd) || defined (L_eq_dd) || defined (L_eq_td)

CMPtype

DFP_EQ (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  CMPtype stat;

  stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);

  /* For EQ return zero for true, nonzero for false.  */

  return stat != 0;

}

#endif /* L_eq */

#if defined (L_ne_sd) || defined (L_ne_dd) || defined (L_ne_td)

CMPtype

DFP_NE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  int stat;

  stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);

  /* For NE return zero for true, nonzero for false.  */

  if (__builtin_expect (stat == -2, 0))  /* An operand is NaN.  */

    return 1;

  return stat != 0;

}

#endif /* L_ne */

#if defined (L_lt_sd) || defined (L_lt_dd) || defined (L_lt_td)

CMPtype

DFP_LT (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  int stat;

  stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);

  /* For LT return -1 (<0) for true, 1 for false.  */

  return (stat == -1) ? -1 : 1;

}

#endif /* L_lt */

#if defined (L_gt_sd) || defined (L_gt_dd) || defined (L_gt_td)

CMPtype

DFP_GT (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  int stat;

  stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);

  /* For GT return 1 (>0) for true, -1 for false.  */

  return (stat == 1) ? 1 : -1;

}

#endif

#if defined (L_le_sd) || defined (L_le_dd) || defined (L_le_td)

CMPtype

DFP_LE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  int stat;

  stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);

  /* For LE return 0 (<= 0) for true, 1 for false.  */

  if (__builtin_expect (stat == -2, 0))  /* An operand is NaN.  */

    return 1;

  return stat == 1;

}

#endif /* L_le */

#if defined (L_ge_sd) || defined (L_ge_dd) || defined (L_ge_td)

CMPtype

DFP_GE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  int stat;

  stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);

  /* For GE return 1 (>=0) for true, -1 for false.  */

  if (__builtin_expect (stat == -2, 0))  /* An operand is NaN.  */

    return -1;

  return (stat != -1) ? 1 : -1;

}

#endif /* L_ge */

#define BUFMAX 128

/* Check for floating point exceptions that are relevant for conversions

   between decimal float values and handle them.  */

static inline void

dfp_conversion_exceptions (const int status)

{

  /* decNumber exception flags we care about here.  */

  int ieee_flags;

  int dec_flags = DEC_IEEE_854_Inexact | DEC_IEEE_854_Invalid_operation

                  | DEC_IEEE_854_Overflow;

  dec_flags &= status;

  ieee_flags = DFP_IEEE_FLAGS (dec_flags);

  if (ieee_flags != 0)

    DFP_HANDLE_EXCEPTIONS (ieee_flags);

}

#if defined (L_sd_to_dd)

/* Use decNumber to convert directly from _Decimal32 to _Decimal64.  */

_Decimal64

DFP_TO_DFP (_Decimal32 f_from)

{

  union { _Decimal32 c; decSingle f; } from;

  union { _Decimal64 c; decDouble f; } to;

  from.c = f_from;

  to.f = *decSingleToWider (&from.f, &to.f);

  return to.c;

}

#endif

#if defined (L_sd_to_td)

/* Use decNumber to convert directly from _Decimal32 to _Decimal128.  */

_Decimal128

DFP_TO_DFP (_Decimal32 f_from)

{

  union { _Decimal32 c; decSingle f; } from;

  union { _Decimal128 c; decQuad f; } to;

  decDouble temp;

  from.c = f_from;

  temp = *decSingleToWider (&from.f, &temp);

  to.f = *decDoubleToWider (&temp, &to.f);

  return to.c;

}

#endif

#if defined (L_dd_to_td)

/* Use decNumber to convert directly from _Decimal64 to _Decimal128.  */

_Decimal128

DFP_TO_DFP (_Decimal64 f_from)

{

  union { _Decimal64 c; decDouble f; } from;

  union { _Decimal128 c; decQuad f; } to;

  from.c = f_from;

  to.f = *decDoubleToWider (&from.f, &to.f);

  return to.c;

}

#endif

#if defined (L_dd_to_sd)

/* Use decNumber to convert directly from _Decimal64 to _Decimal32.  */

_Decimal32

DFP_TO_DFP (_Decimal64 f_from)

{

  union { _Decimal32 c; decSingle f; } to;

  union { _Decimal64 c; decDouble f; } from;

  decContext context;

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  from.c = f_from;

  to.f = *decSingleFromWider (&to.f, &from.f, &context);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    dfp_conversion_exceptions (context.status);

  return to.c;

}

#endif

#if defined (L_td_to_sd)

/* Use decNumber to convert directly from _Decimal128 to _Decimal32.  */

_Decimal32

DFP_TO_DFP (_Decimal128 f_from)

{

  union { _Decimal32 c; decSingle f; } to;

  union { _Decimal128 c; decQuad f; } from;

  decDouble temp;

  decContext context;

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  from.c = f_from;

  temp = *decDoubleFromWider (&temp, &from.f, &context);

  to.f = *decSingleFromWider (&to.f, &temp, &context);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    dfp_conversion_exceptions (context.status);

  return to.c;

}

#endif

#if defined (L_td_to_dd)

/* Use decNumber to convert directly from _Decimal128 to _Decimal64.  */

_Decimal64

DFP_TO_DFP (_Decimal128 f_from)

{

  union { _Decimal64 c; decDouble f; } to;

  union { _Decimal128 c; decQuad f; } from;

  decContext context;

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  from.c = f_from;

  to.f = *decDoubleFromWider (&to.f, &from.f, &context);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    dfp_conversion_exceptions (context.status);

  return to.c;

}

#endif

#if defined (L_dd_to_si) || defined (L_td_to_si) \

  || defined (L_dd_to_usi) || defined (L_td_to_usi)

/* Use decNumber to convert directly from decimal float to integer types.  */

INT_TYPE

DFP_TO_INT (DFP_C_TYPE x)

{

  union { DFP_C_TYPE c; decFloat f; } u;

  decContext context;

  INT_TYPE i;

  decContextDefault (&context, DEC_INIT_DECIMAL128);

  context.round = DEC_ROUND_DOWN;

  u.c = x;

  i = DEC_FLOAT_TO_INT (&u.f, &context, context.round);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    dfp_conversion_exceptions (context.status);

  return i;

}

#endif

#if defined (L_sd_to_si) || (L_sd_to_usi)

/* Use decNumber to convert directly from decimal float to integer types.  */

INT_TYPE

DFP_TO_INT (_Decimal32 x)

{

  union { _Decimal32 c; decSingle f; } u32;

  decDouble f64;

  decContext context;

  INT_TYPE i;

  decContextDefault (&context, DEC_INIT_DECIMAL128);

  context.round = DEC_ROUND_DOWN;

  u32.c = x;

  f64 = *decSingleToWider (&u32.f, &f64);

  i = DEC_FLOAT_TO_INT (&f64, &context, context.round);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    dfp_conversion_exceptions (context.status);

  return i;

}

#endif

#if defined (L_sd_to_di) || defined (L_dd_to_di) || defined (L_td_to_di) \

  || defined (L_sd_to_udi) || defined (L_dd_to_udi) || defined (L_td_to_udi)

/* decNumber doesn't provide support for conversions to 64-bit integer

   types, so do it the hard way.  */

INT_TYPE

DFP_TO_INT (DFP_C_TYPE x)

{

  /* decNumber's decimal* types have the same format as C's _Decimal*

     types, but they have different calling conventions.  */

  /* TODO: Decimal float to integer conversions should raise FE_INVALID

     if the result value does not fit into the result type.  */

  IEEE_TYPE s;

  char buf[BUFMAX];

  char *pos;

  decNumber qval, n1, n2;

  decContext context;

  /* Use a large context to avoid losing precision.  */

  decContextDefault (&context, DEC_INIT_DECIMAL128);

  /* Need non-default rounding mode here.  */

  context.round = DEC_ROUND_DOWN;

  HOST_TO_IEEE (x, &s);

  TO_INTERNAL (&s, &n1);

  /* Rescale if the exponent is less than zero.  */

  decNumberToIntegralValue (&n2, &n1, &context);

  /* Get a value to use for the quantize call.  */

  decNumberFromString (&qval, "1.", &context);

  /* Force the exponent to zero.  */

  decNumberQuantize (&n1, &n2, &qval, &context);

  /* Get a string, which at this point will not include an exponent.  */

  decNumberToString (&n1, buf);

  /* Ignore the fractional part.  */

  pos = strchr (buf, '.');

  if (pos)

    *pos = 0;

  /* Use a C library function to convert to the integral type.  */

  return STR_TO_INT (buf, NULL, 10);

}

#endif

#if defined (L_si_to_dd) || defined (L_si_to_td) \

  || defined (L_usi_to_dd) || defined (L_usi_to_td)

/* Use decNumber to convert directly from integer to decimal float types.  */

DFP_C_TYPE

INT_TO_DFP (INT_TYPE i)

{

  union { DFP_C_TYPE c; decFloat f; } u;

  u.f = *DEC_FLOAT_FROM_INT (&u.f, i);

  return u.c;

}

#endif

#if defined (L_si_to_sd) || defined (L_usi_to_sd)

_Decimal32

/* Use decNumber to convert directly from integer to decimal float types.  */

INT_TO_DFP (INT_TYPE i)

{

  union { _Decimal32 c; decSingle f; } u32;

  decDouble f64;

  decContext context;

  decContextDefault (&context, DEC_INIT_DECIMAL128);

  f64 = *DEC_FLOAT_FROM_INT (&f64, i);

  u32.f = *decSingleFromWider (&u32.f, &f64, &context);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    dfp_conversion_exceptions (context.status);

  return u32.c;

}

#endif

#if defined (L_di_to_sd) || defined (L_di_to_dd) || defined (L_di_to_td) \

  || defined (L_udi_to_sd) || defined (L_udi_to_dd) || defined (L_udi_to_td)

/* decNumber doesn't provide support for conversions from 64-bit integer

   types, so do it the hard way.  */

DFP_C_TYPE

INT_TO_DFP (INT_TYPE i)

{

  DFP_C_TYPE f;

  IEEE_TYPE s;

  char buf[BUFMAX];

  decContext context;

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  /* Use a C library function to get a floating point string.  */

  sprintf (buf, INT_FMT ".", CAST_FOR_FMT(i));

  /* Convert from the floating point string to a decimal* type.  */

  FROM_STRING (&s, buf, &context);

  IEEE_TO_HOST (s, &f);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    dfp_conversion_exceptions (context.status);

  return f;

}

#endif

#if defined (L_sd_to_sf) || defined (L_dd_to_sf) || defined (L_td_to_sf) \

 || defined (L_sd_to_df) || defined (L_dd_to_df) || defined (L_td_to_df) \

 || ((defined (L_sd_to_xf) || defined (L_dd_to_xf) || defined (L_td_to_xf)) \

     && LONG_DOUBLE_HAS_XF_MODE) \

 || ((defined (L_sd_to_tf) || defined (L_dd_to_tf) || defined (L_td_to_tf)) \

     && LONG_DOUBLE_HAS_TF_MODE)

BFP_TYPE

DFP_TO_BFP (DFP_C_TYPE f)

{

  IEEE_TYPE s;

  char buf[BUFMAX];

  HOST_TO_IEEE (f, &s);

  /* Write the value to a string.  */

  TO_STRING (&s, buf);

  /* Read it as the binary floating point type and return that.  */

  return STR_TO_BFP (buf, NULL);

}

#endif

#if defined (L_sf_to_sd) || defined (L_sf_to_dd) || defined (L_sf_to_td) \

 || defined (L_df_to_sd) || defined (L_df_to_dd) || defined (L_df_to_td) \

 || ((defined (L_xf_to_sd) || defined (L_xf_to_dd) || defined (L_xf_to_td)) \

     && LONG_DOUBLE_HAS_XF_MODE) \

 || ((defined (L_tf_to_sd) || defined (L_tf_to_dd) || defined (L_tf_to_td)) \

     && LONG_DOUBLE_HAS_TF_MODE)

DFP_C_TYPE

BFP_TO_DFP (BFP_TYPE x)

{

  DFP_C_TYPE f;

  IEEE_TYPE s;

  char buf[BUFMAX];

  decContext context;

  decContextDefault (&context, CONTEXT_INIT);

  DFP_INIT_ROUNDMODE (context.round);

  /* Use a C library function to write the floating point value to a string.  */

  sprintf (buf, BFP_FMT, (BFP_VIA_TYPE) x);

  /* Convert from the floating point string to a decimal* type.  */

  FROM_STRING (&s, buf, &context);

  IEEE_TO_HOST (s, &f);

  if (DFP_EXCEPTIONS_ENABLED && context.status != 0)

    {

      /* decNumber exception flags we care about here.  */

      int ieee_flags;

      int dec_flags = DEC_IEEE_854_Inexact | DEC_IEEE_854_Invalid_operation

                      | DEC_IEEE_854_Overflow | DEC_IEEE_854_Underflow;

      dec_flags &= context.status;

      ieee_flags = DFP_IEEE_FLAGS (dec_flags);

      if (ieee_flags != 0)

        DFP_HANDLE_EXCEPTIONS (ieee_flags);

    }

  return f;

}

#endif

#if defined (L_unord_sd) || defined (L_unord_dd) || defined (L_unord_td)

CMPtype

DFP_UNORD (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)

{

  decNumber arg1, arg2;

  IEEE_TYPE a, b;

  HOST_TO_IEEE (arg_a, &a);

  HOST_TO_IEEE (arg_b, &b);

  TO_INTERNAL (&a, &arg1);

  TO_INTERNAL (&b, &arg2);

  return (decNumberIsNaN (&arg1) || decNumberIsNaN (&arg2));

}

#endif /* L_unord_sd || L_unord_dd || L_unord_td */