gcc:

	* config/dfp-bit.c, config/dfp-bit.h: Move to ../libgcc.
	* config/t-dfprules: Move to ../libgcc/config.
	* config.gcc (i[34567]86-*-linux*, i[34567]86-*-kfreebsd*-gnu,
	i[34567]86-*-knetbsd*-gnu, i[34567]86-*-gnu*,
	i[34567]86-*-kopensolaris*-gnu): Remove t-dfprules from tmake_file.
	(x86_64-*-linux*, x86_64-*-kfreebsd*-gnu, x86_64-*-knetbsd*-gnu):
	Likewise.
	(i[34567]86-*-cygwin*): Likewise.
	(i[34567]86-*-mingw*,  x86_64-*-mingw*): Likewise.
	(powerpc-*-linux*, powerpc64-*-linux*): Likewise.
	* Makefile.in (D32PBIT_FUNCS, D64PBIT_FUNCS, D128PBIT_FUNCS): Remove.
	(libgcc.mvars): Remove DFP_ENABLE, DFP_CFLAGS, D32PBIT_FUNCS,
	D64PBIT_FUNCS, D128PBIT_FUNCS.

	libgcc:
	* dfp-bit.c, dfp-bit.h: New files.
	* Makefile.in (D32PBIT_FUNCS, D64PBIT_FUNCS, D128PBIT_FUNCS): New
	variables.
	($(d32pbit-o)): Use $(srcdir) to refer to dfp-bit.c
	($(d64pbit-o)): Likewise.
	($(d128pbit-o)): Likewise.
	* config/t-dfprules: New file.
	* config.host (i[34567]86-*-linux*): Add t-dfprules to tmake_file.
	(i[34567]86-*-kfreebsd*-gnu, i[34567]86-*-knetbsd*-gnu,
	i[34567]86-*-gnu*, i[34567]86-*-kopensolaris*-gnu): Likewise.
	(x86_64-*-linux*): Likewise.
	(x86_64-*-kfreebsd*-gnu, x86_64-*-knetbsd*-gnu): Likewise.
	(i[34567]86-*-cygwin*): Likewise.
	(i[34567]86-*-mingw*,  x86_64-*-mingw*): Likewise.
	(powerpc-*-linux*, powerpc64-*-linux*): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@176156 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 681 insertions, 0 deletions

diff --git a/libgcc/dfp-bit.c b/libgcc/dfp-bit.c
new file mode 100644
index 00000000000..48dcb735510
--- /dev/null
+++ b/libgcc/dfp-bit.c
@@ -0,0 +1,681 @@
+/* This is a software decimal floating point library.
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2011
+   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 "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 */