sparc64: add basic support

No NPTL, no LDSO support.
Bootup with Busybox Ash in Qemu working.
Testuite shows only two failures, but mksh continue/break
support doesn't work.

1 files changed, 875 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sparc64/soft-fp/op-4.h b/libc/sysdeps/linux/sparc64/soft-fp/op-4.h
new file mode 100644
index 000000000..5034667e3
--- /dev/null
+++ b/libc/sysdeps/linux/sparc64/soft-fp/op-4.h
@@ -0,0 +1,875 @@
+/* Software floating-point emulation.
+   Basic four-word fraction declaration and manipulation.
+   Copyright (C) 1997-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson (rth@cygnus.com),
+		  Jakub Jelinek (jj@ultra.linux.cz),
+		  David S. Miller (davem@redhat.com) and
+		  Peter Maydell (pmaydell@chiark.greenend.org.uk).
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   In addition to the permissions in the GNU Lesser General Public
+   License, the Free Software Foundation gives you unlimited
+   permission to link the compiled version of this file into
+   combinations with other programs, and to distribute those
+   combinations without any restriction coming from the use of this
+   file.  (The Lesser General Public License restrictions do apply in
+   other respects; for example, they cover modification of the file,
+   and distribution when not linked into a combine executable.)
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef SOFT_FP_OP_4_H
+#define SOFT_FP_OP_4_H	1
+
+#define _FP_FRAC_DECL_4(X)	_FP_W_TYPE X##_f[4]
+#define _FP_FRAC_COPY_4(D, S)			\
+  (D##_f[0] = S##_f[0], D##_f[1] = S##_f[1],	\
+   D##_f[2] = S##_f[2], D##_f[3] = S##_f[3])
+#define _FP_FRAC_SET_4(X, I)	__FP_FRAC_SET_4 (X, I)
+#define _FP_FRAC_HIGH_4(X)	(X##_f[3])
+#define _FP_FRAC_LOW_4(X)	(X##_f[0])
+#define _FP_FRAC_WORD_4(X, w)	(X##_f[w])
+
+#define _FP_FRAC_SLL_4(X, N)						\
+  do									\
+    {									\
+      _FP_I_TYPE _FP_FRAC_SLL_4_up, _FP_FRAC_SLL_4_down;		\
+      _FP_I_TYPE _FP_FRAC_SLL_4_skip, _FP_FRAC_SLL_4_i;			\
+      _FP_FRAC_SLL_4_skip = (N) / _FP_W_TYPE_SIZE;			\
+      _FP_FRAC_SLL_4_up = (N) % _FP_W_TYPE_SIZE;			\
+      _FP_FRAC_SLL_4_down = _FP_W_TYPE_SIZE - _FP_FRAC_SLL_4_up;	\
+      if (!_FP_FRAC_SLL_4_up)						\
+	for (_FP_FRAC_SLL_4_i = 3;					\
+	     _FP_FRAC_SLL_4_i >= _FP_FRAC_SLL_4_skip;			\
+	     --_FP_FRAC_SLL_4_i)					\
+	  X##_f[_FP_FRAC_SLL_4_i]					\
+	    = X##_f[_FP_FRAC_SLL_4_i-_FP_FRAC_SLL_4_skip];		\
+      else								\
+	{								\
+	  for (_FP_FRAC_SLL_4_i = 3;					\
+	       _FP_FRAC_SLL_4_i > _FP_FRAC_SLL_4_skip;			\
+	       --_FP_FRAC_SLL_4_i)					\
+	    X##_f[_FP_FRAC_SLL_4_i]					\
+	      = ((X##_f[_FP_FRAC_SLL_4_i-_FP_FRAC_SLL_4_skip]		\
+		  << _FP_FRAC_SLL_4_up)					\
+		 | (X##_f[_FP_FRAC_SLL_4_i-_FP_FRAC_SLL_4_skip-1]	\
+		    >> _FP_FRAC_SLL_4_down));				\
+	  X##_f[_FP_FRAC_SLL_4_i--] = X##_f[0] << _FP_FRAC_SLL_4_up;	\
+	}								\
+      for (; _FP_FRAC_SLL_4_i >= 0; --_FP_FRAC_SLL_4_i)			\
+	X##_f[_FP_FRAC_SLL_4_i] = 0;					\
+    }									\
+  while (0)
+
+/* This one was broken too.  */
+#define _FP_FRAC_SRL_4(X, N)						\
+  do									\
+    {									\
+      _FP_I_TYPE _FP_FRAC_SRL_4_up, _FP_FRAC_SRL_4_down;		\
+      _FP_I_TYPE _FP_FRAC_SRL_4_skip, _FP_FRAC_SRL_4_i;			\
+      _FP_FRAC_SRL_4_skip = (N) / _FP_W_TYPE_SIZE;			\
+      _FP_FRAC_SRL_4_down = (N) % _FP_W_TYPE_SIZE;			\
+      _FP_FRAC_SRL_4_up = _FP_W_TYPE_SIZE - _FP_FRAC_SRL_4_down;	\
+      if (!_FP_FRAC_SRL_4_down)						\
+	for (_FP_FRAC_SRL_4_i = 0;					\
+	     _FP_FRAC_SRL_4_i <= 3-_FP_FRAC_SRL_4_skip;			\
+	     ++_FP_FRAC_SRL_4_i)					\
+	  X##_f[_FP_FRAC_SRL_4_i]					\
+	    = X##_f[_FP_FRAC_SRL_4_i+_FP_FRAC_SRL_4_skip];		\
+      else								\
+	{								\
+	  for (_FP_FRAC_SRL_4_i = 0;					\
+	       _FP_FRAC_SRL_4_i < 3-_FP_FRAC_SRL_4_skip;		\
+	       ++_FP_FRAC_SRL_4_i)					\
+	    X##_f[_FP_FRAC_SRL_4_i]					\
+	      = ((X##_f[_FP_FRAC_SRL_4_i+_FP_FRAC_SRL_4_skip]		\
+		  >> _FP_FRAC_SRL_4_down)				\
+		 | (X##_f[_FP_FRAC_SRL_4_i+_FP_FRAC_SRL_4_skip+1]	\
+		    << _FP_FRAC_SRL_4_up));				\
+	  X##_f[_FP_FRAC_SRL_4_i++] = X##_f[3] >> _FP_FRAC_SRL_4_down;	\
+	}								\
+      for (; _FP_FRAC_SRL_4_i < 4; ++_FP_FRAC_SRL_4_i)			\
+	X##_f[_FP_FRAC_SRL_4_i] = 0;					\
+    }									\
+  while (0)
+
+
+/* Right shift with sticky-lsb.
+   What this actually means is that we do a standard right-shift,
+   but that if any of the bits that fall off the right hand side
+   were one then we always set the LSbit.  */
+#define _FP_FRAC_SRST_4(X, S, N, size)					\
+  do									\
+    {									\
+      _FP_I_TYPE _FP_FRAC_SRST_4_up, _FP_FRAC_SRST_4_down;		\
+      _FP_I_TYPE _FP_FRAC_SRST_4_skip, _FP_FRAC_SRST_4_i;		\
+      _FP_W_TYPE _FP_FRAC_SRST_4_s;					\
+      _FP_FRAC_SRST_4_skip = (N) / _FP_W_TYPE_SIZE;			\
+      _FP_FRAC_SRST_4_down = (N) % _FP_W_TYPE_SIZE;			\
+      _FP_FRAC_SRST_4_up = _FP_W_TYPE_SIZE - _FP_FRAC_SRST_4_down;	\
+      for (_FP_FRAC_SRST_4_s = _FP_FRAC_SRST_4_i = 0;			\
+	   _FP_FRAC_SRST_4_i < _FP_FRAC_SRST_4_skip;			\
+	   ++_FP_FRAC_SRST_4_i)						\
+	_FP_FRAC_SRST_4_s |= X##_f[_FP_FRAC_SRST_4_i];			\
+      if (!_FP_FRAC_SRST_4_down)					\
+	for (_FP_FRAC_SRST_4_i = 0;					\
+	     _FP_FRAC_SRST_4_i <= 3-_FP_FRAC_SRST_4_skip;		\
+	     ++_FP_FRAC_SRST_4_i)					\
+	  X##_f[_FP_FRAC_SRST_4_i]					\
+	    = X##_f[_FP_FRAC_SRST_4_i+_FP_FRAC_SRST_4_skip];		\
+      else								\
+	{								\
+	  _FP_FRAC_SRST_4_s						\
+	    |= X##_f[_FP_FRAC_SRST_4_i] << _FP_FRAC_SRST_4_up;		\
+	  for (_FP_FRAC_SRST_4_i = 0;					\
+	       _FP_FRAC_SRST_4_i < 3-_FP_FRAC_SRST_4_skip;		\
+	       ++_FP_FRAC_SRST_4_i)					\
+	    X##_f[_FP_FRAC_SRST_4_i]					\
+	      = ((X##_f[_FP_FRAC_SRST_4_i+_FP_FRAC_SRST_4_skip]		\
+		  >> _FP_FRAC_SRST_4_down)				\
+		 | (X##_f[_FP_FRAC_SRST_4_i+_FP_FRAC_SRST_4_skip+1]	\
+		    << _FP_FRAC_SRST_4_up));				\
+	  X##_f[_FP_FRAC_SRST_4_i++]					\
+	    = X##_f[3] >> _FP_FRAC_SRST_4_down;				\
+	}								\
+      for (; _FP_FRAC_SRST_4_i < 4; ++_FP_FRAC_SRST_4_i)		\
+	X##_f[_FP_FRAC_SRST_4_i] = 0;					\
+      S = (_FP_FRAC_SRST_4_s != 0);					\
+    }									\
+  while (0)
+
+#define _FP_FRAC_SRS_4(X, N, size)				\
+  do								\
+    {								\
+      int _FP_FRAC_SRS_4_sticky;				\
+      _FP_FRAC_SRST_4 (X, _FP_FRAC_SRS_4_sticky, (N), (size));	\
+      X##_f[0] |= _FP_FRAC_SRS_4_sticky;			\
+    }								\
+  while (0)
+
+#define _FP_FRAC_ADD_4(R, X, Y)					\
+  __FP_FRAC_ADD_4 (R##_f[3], R##_f[2], R##_f[1], R##_f[0],	\
+		   X##_f[3], X##_f[2], X##_f[1], X##_f[0],	\
+		   Y##_f[3], Y##_f[2], Y##_f[1], Y##_f[0])
+
+#define _FP_FRAC_SUB_4(R, X, Y)					\
+  __FP_FRAC_SUB_4 (R##_f[3], R##_f[2], R##_f[1], R##_f[0],	\
+		   X##_f[3], X##_f[2], X##_f[1], X##_f[0],	\
+		   Y##_f[3], Y##_f[2], Y##_f[1], Y##_f[0])
+
+#define _FP_FRAC_DEC_4(X, Y)					\
+  __FP_FRAC_DEC_4 (X##_f[3], X##_f[2], X##_f[1], X##_f[0],	\
+		   Y##_f[3], Y##_f[2], Y##_f[1], Y##_f[0])
+
+#define _FP_FRAC_ADDI_4(X, I)					\
+  __FP_FRAC_ADDI_4 (X##_f[3], X##_f[2], X##_f[1], X##_f[0], I)
+
+#define _FP_ZEROFRAC_4  0, 0, 0, 0
+#define _FP_MINFRAC_4   0, 0, 0, 1
+#define _FP_MAXFRAC_4	(~(_FP_WS_TYPE) 0), (~(_FP_WS_TYPE) 0), (~(_FP_WS_TYPE) 0), (~(_FP_WS_TYPE) 0)
+
+#define _FP_FRAC_ZEROP_4(X)     ((X##_f[0] | X##_f[1] | X##_f[2] | X##_f[3]) == 0)
+#define _FP_FRAC_NEGP_4(X)      ((_FP_WS_TYPE) X##_f[3] < 0)
+#define _FP_FRAC_OVERP_4(fs, X)  (_FP_FRAC_HIGH_##fs (X) & _FP_OVERFLOW_##fs)
+#define _FP_FRAC_HIGHBIT_DW_4(fs, X)	\
+  (_FP_FRAC_HIGH_DW_##fs (X) & _FP_HIGHBIT_DW_##fs)
+#define _FP_FRAC_CLEAR_OVERP_4(fs, X)  (_FP_FRAC_HIGH_##fs (X) &= ~_FP_OVERFLOW_##fs)
+
+#define _FP_FRAC_EQ_4(X, Y)				\
+  (X##_f[0] == Y##_f[0] && X##_f[1] == Y##_f[1]		\
+   && X##_f[2] == Y##_f[2] && X##_f[3] == Y##_f[3])
+
+#define _FP_FRAC_GT_4(X, Y)				\
+  (X##_f[3] > Y##_f[3]					\
+   || (X##_f[3] == Y##_f[3]				\
+       && (X##_f[2] > Y##_f[2]				\
+	   || (X##_f[2] == Y##_f[2]			\
+	       && (X##_f[1] > Y##_f[1]			\
+		   || (X##_f[1] == Y##_f[1]		\
+		       && X##_f[0] > Y##_f[0]))))))
+
+#define _FP_FRAC_GE_4(X, Y)				\
+  (X##_f[3] > Y##_f[3]					\
+   || (X##_f[3] == Y##_f[3]				\
+       && (X##_f[2] > Y##_f[2]				\
+	   || (X##_f[2] == Y##_f[2]			\
+	       && (X##_f[1] > Y##_f[1]			\
+		   || (X##_f[1] == Y##_f[1]		\
+		       && X##_f[0] >= Y##_f[0]))))))
+
+
+#define _FP_FRAC_CLZ_4(R, X)			\
+  do						\
+    {						\
+      if (X##_f[3])				\
+	__FP_CLZ ((R), X##_f[3]);		\
+      else if (X##_f[2])			\
+	{					\
+	  __FP_CLZ ((R), X##_f[2]);		\
+	  (R) += _FP_W_TYPE_SIZE;		\
+	}					\
+      else if (X##_f[1])			\
+	{					\
+	  __FP_CLZ ((R), X##_f[1]);		\
+	  (R) += _FP_W_TYPE_SIZE*2;		\
+	}					\
+      else					\
+	{					\
+	  __FP_CLZ ((R), X##_f[0]);		\
+	  (R) += _FP_W_TYPE_SIZE*3;		\
+	}					\
+    }						\
+  while (0)
+
+
+#define _FP_UNPACK_RAW_4(fs, X, val)			\
+  do							\
+    {							\
+      union _FP_UNION_##fs _FP_UNPACK_RAW_4_flo;	\
+      _FP_UNPACK_RAW_4_flo.flt = (val);			\
+      X##_f[0] = _FP_UNPACK_RAW_4_flo.bits.frac0;	\
+      X##_f[1] = _FP_UNPACK_RAW_4_flo.bits.frac1;	\
+      X##_f[2] = _FP_UNPACK_RAW_4_flo.bits.frac2;	\
+      X##_f[3] = _FP_UNPACK_RAW_4_flo.bits.frac3;	\
+      X##_e  = _FP_UNPACK_RAW_4_flo.bits.exp;		\
+      X##_s  = _FP_UNPACK_RAW_4_flo.bits.sign;		\
+    }							\
+  while (0)
+
+#define _FP_UNPACK_RAW_4_P(fs, X, val)			\
+  do							\
+    {							\
+      union _FP_UNION_##fs *_FP_UNPACK_RAW_4_P_flo	\
+	= (union _FP_UNION_##fs *) (val);		\
+							\
+      X##_f[0] = _FP_UNPACK_RAW_4_P_flo->bits.frac0;	\
+      X##_f[1] = _FP_UNPACK_RAW_4_P_flo->bits.frac1;	\
+      X##_f[2] = _FP_UNPACK_RAW_4_P_flo->bits.frac2;	\
+      X##_f[3] = _FP_UNPACK_RAW_4_P_flo->bits.frac3;	\
+      X##_e  = _FP_UNPACK_RAW_4_P_flo->bits.exp;	\
+      X##_s  = _FP_UNPACK_RAW_4_P_flo->bits.sign;	\
+    }							\
+  while (0)
+
+#define _FP_PACK_RAW_4(fs, val, X)		\
+  do						\
+    {						\
+      union _FP_UNION_##fs _FP_PACK_RAW_4_flo;	\
+      _FP_PACK_RAW_4_flo.bits.frac0 = X##_f[0];	\
+      _FP_PACK_RAW_4_flo.bits.frac1 = X##_f[1];	\
+      _FP_PACK_RAW_4_flo.bits.frac2 = X##_f[2];	\
+      _FP_PACK_RAW_4_flo.bits.frac3 = X##_f[3];	\
+      _FP_PACK_RAW_4_flo.bits.exp   = X##_e;	\
+      _FP_PACK_RAW_4_flo.bits.sign  = X##_s;	\
+      (val) = _FP_PACK_RAW_4_flo.flt;		\
+    }						\
+  while (0)
+
+#define _FP_PACK_RAW_4_P(fs, val, X)			\
+  do							\
+    {							\
+      union _FP_UNION_##fs *_FP_PACK_RAW_4_P_flo	\
+	= (union _FP_UNION_##fs *) (val);		\
+							\
+      _FP_PACK_RAW_4_P_flo->bits.frac0 = X##_f[0];	\
+      _FP_PACK_RAW_4_P_flo->bits.frac1 = X##_f[1];	\
+      _FP_PACK_RAW_4_P_flo->bits.frac2 = X##_f[2];	\
+      _FP_PACK_RAW_4_P_flo->bits.frac3 = X##_f[3];	\
+      _FP_PACK_RAW_4_P_flo->bits.exp   = X##_e;		\
+      _FP_PACK_RAW_4_P_flo->bits.sign  = X##_s;		\
+    }							\
+  while (0)
+
+/* Multiplication algorithms: */
+
+/* Given a 1W * 1W => 2W primitive, do the extended multiplication.  */
+
+#define _FP_MUL_MEAT_DW_4_wide(wfracbits, R, X, Y, doit)		\
+  do									\
+    {									\
+      _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_b);			\
+      _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_c);			\
+      _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_d);			\
+      _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_e);			\
+      _FP_FRAC_DECL_2 (_FP_MUL_MEAT_DW_4_wide_f);			\
+									\
+      doit (_FP_FRAC_WORD_8 (R, 1), _FP_FRAC_WORD_8 (R, 0),		\
+	    X##_f[0], Y##_f[0]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_b_f1, _FP_MUL_MEAT_DW_4_wide_b_f0,	\
+	    X##_f[0], Y##_f[1]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_c_f1, _FP_MUL_MEAT_DW_4_wide_c_f0,	\
+	    X##_f[1], Y##_f[0]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_d_f1, _FP_MUL_MEAT_DW_4_wide_d_f0,	\
+	    X##_f[1], Y##_f[1]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_e_f1, _FP_MUL_MEAT_DW_4_wide_e_f0,	\
+	    X##_f[0], Y##_f[2]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_f_f1, _FP_MUL_MEAT_DW_4_wide_f_f0,	\
+	    X##_f[2], Y##_f[0]);					\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2),	\
+		       _FP_FRAC_WORD_8 (R, 1), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_b_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_b_f0,			\
+		       0, 0, _FP_FRAC_WORD_8 (R, 1));			\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2),	\
+		       _FP_FRAC_WORD_8 (R, 1), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_c_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_c_f0,			\
+		       _FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2),	\
+		       _FP_FRAC_WORD_8 (R, 1));				\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3),	\
+		       _FP_FRAC_WORD_8 (R, 2), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_d_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_d_f0,			\
+		       0, _FP_FRAC_WORD_8 (R, 3), _FP_FRAC_WORD_8 (R, 2)); \
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3),	\
+		       _FP_FRAC_WORD_8 (R, 2), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_e_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_e_f0,			\
+		       _FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3),	\
+		       _FP_FRAC_WORD_8 (R, 2));				\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3),	\
+		       _FP_FRAC_WORD_8 (R, 2), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_f_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_f_f0,			\
+		       _FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3),	\
+		       _FP_FRAC_WORD_8 (R, 2));				\
+      doit (_FP_MUL_MEAT_DW_4_wide_b_f1,				\
+	    _FP_MUL_MEAT_DW_4_wide_b_f0, X##_f[0], Y##_f[3]);		\
+      doit (_FP_MUL_MEAT_DW_4_wide_c_f1,				\
+	    _FP_MUL_MEAT_DW_4_wide_c_f0, X##_f[3], Y##_f[0]);		\
+      doit (_FP_MUL_MEAT_DW_4_wide_d_f1, _FP_MUL_MEAT_DW_4_wide_d_f0,	\
+	    X##_f[1], Y##_f[2]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_e_f1, _FP_MUL_MEAT_DW_4_wide_e_f0,	\
+	    X##_f[2], Y##_f[1]);					\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4),	\
+		       _FP_FRAC_WORD_8 (R, 3), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_b_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_b_f0,			\
+		       0, _FP_FRAC_WORD_8 (R, 4), _FP_FRAC_WORD_8 (R, 3)); \
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4),	\
+		       _FP_FRAC_WORD_8 (R, 3), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_c_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_c_f0,			\
+		       _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4),	\
+		       _FP_FRAC_WORD_8 (R, 3));				\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4),	\
+		       _FP_FRAC_WORD_8 (R, 3), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_d_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_d_f0,			\
+		       _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4),	\
+		       _FP_FRAC_WORD_8 (R, 3));				\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4),	\
+		       _FP_FRAC_WORD_8 (R, 3), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_e_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_e_f0,			\
+		       _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4),	\
+		       _FP_FRAC_WORD_8 (R, 3));				\
+      doit (_FP_MUL_MEAT_DW_4_wide_b_f1, _FP_MUL_MEAT_DW_4_wide_b_f0,	\
+	    X##_f[2], Y##_f[2]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_c_f1, _FP_MUL_MEAT_DW_4_wide_c_f0,	\
+	    X##_f[1], Y##_f[3]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_d_f1, _FP_MUL_MEAT_DW_4_wide_d_f0,	\
+	    X##_f[3], Y##_f[1]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_e_f1, _FP_MUL_MEAT_DW_4_wide_e_f0,	\
+	    X##_f[2], Y##_f[3]);					\
+      doit (_FP_MUL_MEAT_DW_4_wide_f_f1, _FP_MUL_MEAT_DW_4_wide_f_f0,	\
+	    X##_f[3], Y##_f[2]);					\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5),	\
+		       _FP_FRAC_WORD_8 (R, 4), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_b_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_b_f0,			\
+		       0, _FP_FRAC_WORD_8 (R, 5), _FP_FRAC_WORD_8 (R, 4)); \
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5),	\
+		       _FP_FRAC_WORD_8 (R, 4), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_c_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_c_f0,			\
+		       _FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5),	\
+		       _FP_FRAC_WORD_8 (R, 4));				\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5),	\
+		       _FP_FRAC_WORD_8 (R, 4), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_d_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_d_f0,			\
+		       _FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5),	\
+		       _FP_FRAC_WORD_8 (R, 4));				\
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6),	\
+		       _FP_FRAC_WORD_8 (R, 5), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_e_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_e_f0,			\
+		       0, _FP_FRAC_WORD_8 (R, 6), _FP_FRAC_WORD_8 (R, 5)); \
+      __FP_FRAC_ADD_3 (_FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6),	\
+		       _FP_FRAC_WORD_8 (R, 5), 0,			\
+		       _FP_MUL_MEAT_DW_4_wide_f_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_f_f0,			\
+		       _FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6),	\
+		       _FP_FRAC_WORD_8 (R, 5));				\
+      doit (_FP_MUL_MEAT_DW_4_wide_b_f1, _FP_MUL_MEAT_DW_4_wide_b_f0,	\
+	    X##_f[3], Y##_f[3]);					\
+      __FP_FRAC_ADD_2 (_FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6),	\
+		       _FP_MUL_MEAT_DW_4_wide_b_f1,			\
+		       _FP_MUL_MEAT_DW_4_wide_b_f0,			\
+		       _FP_FRAC_WORD_8 (R, 7), _FP_FRAC_WORD_8 (R, 6));	\
+    }									\
+  while (0)
+
+#define _FP_MUL_MEAT_4_wide(wfracbits, R, X, Y, doit)			\
+  do									\
+    {									\
+      _FP_FRAC_DECL_8 (_FP_MUL_MEAT_4_wide_z);				\
+									\
+      _FP_MUL_MEAT_DW_4_wide ((wfracbits), _FP_MUL_MEAT_4_wide_z,	\
+			      X, Y, doit);				\
+									\
+      /* Normalize since we know where the msb of the multiplicands	\
+	 were (bit B), we know that the msb of the of the product is	\
+	 at either 2B or 2B-1.  */					\
+      _FP_FRAC_SRS_8 (_FP_MUL_MEAT_4_wide_z, (wfracbits)-1,		\
+		      2*(wfracbits));					\
+      __FP_FRAC_SET_4 (R, _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 3),	\
+		       _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 2),	\
+		       _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 1),	\
+		       _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_wide_z, 0));	\
+    }									\
+  while (0)
+
+#define _FP_MUL_MEAT_DW_4_gmp(wfracbits, R, X, Y)	\
+  do							\
+    {							\
+      mpn_mul_n (R##_f, _x_f, _y_f, 4);			\
+    }							\
+  while (0)
+
+#define _FP_MUL_MEAT_4_gmp(wfracbits, R, X, Y)				\
+  do									\
+    {									\
+      _FP_FRAC_DECL_8 (_FP_MUL_MEAT_4_gmp_z);				\
+									\
+      _FP_MUL_MEAT_DW_4_gmp ((wfracbits), _FP_MUL_MEAT_4_gmp_z, X, Y);	\
+									\
+      /* Normalize since we know where the msb of the multiplicands	\
+	 were (bit B), we know that the msb of the of the product is	\
+	 at either 2B or 2B-1.  */					\
+      _FP_FRAC_SRS_8 (_FP_MUL_MEAT_4_gmp_z, (wfracbits)-1,		\
+		      2*(wfracbits));					\
+      __FP_FRAC_SET_4 (R, _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 3),	\
+		       _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 2),	\
+		       _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 1),	\
+		       _FP_FRAC_WORD_8 (_FP_MUL_MEAT_4_gmp_z, 0));	\
+    }									\
+  while (0)
+
+/* Helper utility for _FP_DIV_MEAT_4_udiv:
+ * pppp = m * nnn.  */
+#define umul_ppppmnnn(p3, p2, p1, p0, m, n2, n1, n0)	\
+  do							\
+    {							\
+      UWtype umul_ppppmnnn_t;				\
+      umul_ppmm (p1, p0, m, n0);			\
+      umul_ppmm (p2, umul_ppppmnnn_t, m, n1);		\
+      __FP_FRAC_ADDI_2 (p2, p1, umul_ppppmnnn_t);	\
+      umul_ppmm (p3, umul_ppppmnnn_t, m, n2);		\
+      __FP_FRAC_ADDI_2 (p3, p2, umul_ppppmnnn_t);	\
+    }							\
+  while (0)
+
+/* Division algorithms: */
+
+#define _FP_DIV_MEAT_4_udiv(fs, R, X, Y)				\
+  do									\
+    {									\
+      int _FP_DIV_MEAT_4_udiv_i;					\
+      _FP_FRAC_DECL_4 (_FP_DIV_MEAT_4_udiv_n);				\
+      _FP_FRAC_DECL_4 (_FP_DIV_MEAT_4_udiv_m);				\
+      _FP_FRAC_SET_4 (_FP_DIV_MEAT_4_udiv_n, _FP_ZEROFRAC_4);		\
+      if (_FP_FRAC_GE_4 (X, Y))						\
+	{								\
+	  _FP_DIV_MEAT_4_udiv_n_f[3]					\
+	    = X##_f[0] << (_FP_W_TYPE_SIZE - 1);			\
+	  _FP_FRAC_SRL_4 (X, 1);					\
+	}								\
+      else								\
+	R##_e--;							\
+									\
+      /* Normalize, i.e. make the most significant bit of the		\
+	 denominator set.  */						\
+      _FP_FRAC_SLL_4 (Y, _FP_WFRACXBITS_##fs);				\
+									\
+      for (_FP_DIV_MEAT_4_udiv_i = 3; ; _FP_DIV_MEAT_4_udiv_i--)	\
+	{								\
+	  if (X##_f[3] == Y##_f[3])					\
+	    {								\
+	      /* This is a special case, not an optimization		\
+		 (X##_f[3]/Y##_f[3] would not fit into UWtype).		\
+		 As X## is guaranteed to be < Y,			\
+		 R##_f[_FP_DIV_MEAT_4_udiv_i] can be either		\
+		 (UWtype)-1 or (UWtype)-2.  */				\
+	      R##_f[_FP_DIV_MEAT_4_udiv_i] = -1;			\
+	      if (!_FP_DIV_MEAT_4_udiv_i)				\
+		break;							\
+	      __FP_FRAC_SUB_4 (X##_f[3], X##_f[2], X##_f[1], X##_f[0],	\
+			       Y##_f[2], Y##_f[1], Y##_f[0], 0,		\
+			       X##_f[2], X##_f[1], X##_f[0],		\
+			       _FP_DIV_MEAT_4_udiv_n_f[_FP_DIV_MEAT_4_udiv_i]); \
+	      _FP_FRAC_SUB_4 (X, Y, X);					\
+	      if (X##_f[3] > Y##_f[3])					\
+		{							\
+		  R##_f[_FP_DIV_MEAT_4_udiv_i] = -2;			\
+		  _FP_FRAC_ADD_4 (X, Y, X);				\
+		}							\
+	    }								\
+	  else								\
+	    {								\
+	      udiv_qrnnd (R##_f[_FP_DIV_MEAT_4_udiv_i],			\
+			  X##_f[3], X##_f[3], X##_f[2], Y##_f[3]);	\
+	      umul_ppppmnnn (_FP_DIV_MEAT_4_udiv_m_f[3],		\
+			     _FP_DIV_MEAT_4_udiv_m_f[2],		\
+			     _FP_DIV_MEAT_4_udiv_m_f[1],		\
+			     _FP_DIV_MEAT_4_udiv_m_f[0],		\
+			     R##_f[_FP_DIV_MEAT_4_udiv_i],		\
+			     Y##_f[2], Y##_f[1], Y##_f[0]);		\
+	      X##_f[2] = X##_f[1];					\
+	      X##_f[1] = X##_f[0];					\
+	      X##_f[0]							\
+		= _FP_DIV_MEAT_4_udiv_n_f[_FP_DIV_MEAT_4_udiv_i];	\
+	      if (_FP_FRAC_GT_4 (_FP_DIV_MEAT_4_udiv_m, X))		\
+		{							\
+		  R##_f[_FP_DIV_MEAT_4_udiv_i]--;			\
+		  _FP_FRAC_ADD_4 (X, Y, X);				\
+		  if (_FP_FRAC_GE_4 (X, Y)				\
+		      && _FP_FRAC_GT_4 (_FP_DIV_MEAT_4_udiv_m, X))	\
+		    {							\
+		      R##_f[_FP_DIV_MEAT_4_udiv_i]--;			\
+		      _FP_FRAC_ADD_4 (X, Y, X);				\
+		    }							\
+		}							\
+	      _FP_FRAC_DEC_4 (X, _FP_DIV_MEAT_4_udiv_m);		\
+	      if (!_FP_DIV_MEAT_4_udiv_i)				\
+		{							\
+		  if (!_FP_FRAC_EQ_4 (X, _FP_DIV_MEAT_4_udiv_m))	\
+		    R##_f[0] |= _FP_WORK_STICKY;			\
+		  break;						\
+		}							\
+	    }								\
+	}								\
+    }									\
+  while (0)
+
+
+/* Square root algorithms:
+   We have just one right now, maybe Newton approximation
+   should be added for those machines where division is fast.  */
+
+#define _FP_SQRT_MEAT_4(R, S, T, X, q)					\
+  do									\
+    {									\
+      while (q)								\
+	{								\
+	  T##_f[3] = S##_f[3] + (q);					\
+	  if (T##_f[3] <= X##_f[3])					\
+	    {								\
+	      S##_f[3] = T##_f[3] + (q);				\
+	      X##_f[3] -= T##_f[3];					\
+	      R##_f[3] += (q);						\
+	    }								\
+	  _FP_FRAC_SLL_4 (X, 1);					\
+	  (q) >>= 1;							\
+	}								\
+      (q) = (_FP_W_TYPE) 1 << (_FP_W_TYPE_SIZE - 1);			\
+      while (q)								\
+	{								\
+	  T##_f[2] = S##_f[2] + (q);					\
+	  T##_f[3] = S##_f[3];						\
+	  if (T##_f[3] < X##_f[3]					\
+	      || (T##_f[3] == X##_f[3] && T##_f[2] <= X##_f[2]))	\
+	    {								\
+	      S##_f[2] = T##_f[2] + (q);				\
+	      S##_f[3] += (T##_f[2] > S##_f[2]);			\
+	      __FP_FRAC_DEC_2 (X##_f[3], X##_f[2],			\
+			       T##_f[3], T##_f[2]);			\
+	      R##_f[2] += (q);						\
+	    }								\
+	  _FP_FRAC_SLL_4 (X, 1);					\
+	  (q) >>= 1;							\
+	}								\
+      (q) = (_FP_W_TYPE) 1 << (_FP_W_TYPE_SIZE - 1);			\
+      while (q)								\
+	{								\
+	  T##_f[1] = S##_f[1] + (q);					\
+	  T##_f[2] = S##_f[2];						\
+	  T##_f[3] = S##_f[3];						\
+	  if (T##_f[3] < X##_f[3]					\
+	      || (T##_f[3] == X##_f[3]					\
+		  && (T##_f[2] < X##_f[2]				\
+		      || (T##_f[2] == X##_f[2]				\
+			  && T##_f[1] <= X##_f[1]))))			\
+	    {								\
+	      S##_f[1] = T##_f[1] + (q);				\
+	      S##_f[2] += (T##_f[1] > S##_f[1]);			\
+	      S##_f[3] += (T##_f[2] > S##_f[2]);			\
+	      __FP_FRAC_DEC_3 (X##_f[3], X##_f[2], X##_f[1],		\
+			       T##_f[3], T##_f[2], T##_f[1]);		\
+	      R##_f[1] += (q);						\
+	    }								\
+	  _FP_FRAC_SLL_4 (X, 1);					\
+	  (q) >>= 1;							\
+	}								\
+      (q) = (_FP_W_TYPE) 1 << (_FP_W_TYPE_SIZE - 1);			\
+      while ((q) != _FP_WORK_ROUND)					\
+	{								\
+	  T##_f[0] = S##_f[0] + (q);					\
+	  T##_f[1] = S##_f[1];						\
+	  T##_f[2] = S##_f[2];						\
+	  T##_f[3] = S##_f[3];						\
+	  if (_FP_FRAC_GE_4 (X, T))					\
+	    {								\
+	      S##_f[0] = T##_f[0] + (q);				\
+	      S##_f[1] += (T##_f[0] > S##_f[0]);			\
+	      S##_f[2] += (T##_f[1] > S##_f[1]);			\
+	      S##_f[3] += (T##_f[2] > S##_f[2]);			\
+	      _FP_FRAC_DEC_4 (X, T);					\
+	      R##_f[0] += (q);						\
+	    }								\
+	  _FP_FRAC_SLL_4 (X, 1);					\
+	  (q) >>= 1;							\
+	}								\
+      if (!_FP_FRAC_ZEROP_4 (X))					\
+	{								\
+	  if (_FP_FRAC_GT_4 (X, S))					\
+	    R##_f[0] |= _FP_WORK_ROUND;					\
+	  R##_f[0] |= _FP_WORK_STICKY;					\
+	}								\
+    }									\
+  while (0)
+
+
+/* Internals.  */
+
+#define __FP_FRAC_SET_4(X, I3, I2, I1, I0)			\
+  (X##_f[3] = I3, X##_f[2] = I2, X##_f[1] = I1, X##_f[0] = I0)
+
+#ifndef __FP_FRAC_ADD_3
+# define __FP_FRAC_ADD_3(r2, r1, r0, x2, x1, x0, y2, y1, y0)	\
+  do								\
+    {								\
+      _FP_W_TYPE __FP_FRAC_ADD_3_c1, __FP_FRAC_ADD_3_c2;	\
+      r0 = x0 + y0;						\
+      __FP_FRAC_ADD_3_c1 = r0 < x0;				\
+      r1 = x1 + y1;						\
+      __FP_FRAC_ADD_3_c2 = r1 < x1;				\
+      r1 += __FP_FRAC_ADD_3_c1;					\
+      __FP_FRAC_ADD_3_c2 |= r1 < __FP_FRAC_ADD_3_c1;		\
+      r2 = x2 + y2 + __FP_FRAC_ADD_3_c2;			\
+    }								\
+  while (0)
+#endif
+
+#ifndef __FP_FRAC_ADD_4
+# define __FP_FRAC_ADD_4(r3, r2, r1, r0, x3, x2, x1, x0, y3, y2, y1, y0) \
+  do									\
+    {									\
+      _FP_W_TYPE __FP_FRAC_ADD_4_c1, __FP_FRAC_ADD_4_c2;		\
+      _FP_W_TYPE __FP_FRAC_ADD_4_c3;					\
+      r0 = x0 + y0;							\
+      __FP_FRAC_ADD_4_c1 = r0 < x0;					\
+      r1 = x1 + y1;							\
+      __FP_FRAC_ADD_4_c2 = r1 < x1;					\
+      r1 += __FP_FRAC_ADD_4_c1;						\
+      __FP_FRAC_ADD_4_c2 |= r1 < __FP_FRAC_ADD_4_c1;			\
+      r2 = x2 + y2;							\
+      __FP_FRAC_ADD_4_c3 = r2 < x2;					\
+      r2 += __FP_FRAC_ADD_4_c2;						\
+      __FP_FRAC_ADD_4_c3 |= r2 < __FP_FRAC_ADD_4_c2;			\
+      r3 = x3 + y3 + __FP_FRAC_ADD_4_c3;				\
+    }									\
+  while (0)
+#endif
+
+#ifndef __FP_FRAC_SUB_3
+# define __FP_FRAC_SUB_3(r2, r1, r0, x2, x1, x0, y2, y1, y0)	\
+  do								\
+    {								\
+      _FP_W_TYPE __FP_FRAC_SUB_3_c1, __FP_FRAC_SUB_3_c2;	\
+      r0 = x0 - y0;						\
+      __FP_FRAC_SUB_3_c1 = r0 > x0;				\
+      r1 = x1 - y1;						\
+      __FP_FRAC_SUB_3_c2 = r1 > x1;				\
+      r1 -= __FP_FRAC_SUB_3_c1;					\
+      __FP_FRAC_SUB_3_c2 |= __FP_FRAC_SUB_3_c1 && (y1 == x1);	\
+      r2 = x2 - y2 - __FP_FRAC_SUB_3_c2;			\
+    }								\
+  while (0)
+#endif
+
+#ifndef __FP_FRAC_SUB_4
+# define __FP_FRAC_SUB_4(r3, r2, r1, r0, x3, x2, x1, x0, y3, y2, y1, y0) \
+  do									\
+    {									\
+      _FP_W_TYPE __FP_FRAC_SUB_4_c1, __FP_FRAC_SUB_4_c2;		\
+      _FP_W_TYPE __FP_FRAC_SUB_4_c3;					\
+      r0 = x0 - y0;							\
+      __FP_FRAC_SUB_4_c1 = r0 > x0;					\
+      r1 = x1 - y1;							\
+      __FP_FRAC_SUB_4_c2 = r1 > x1;					\
+      r1 -= __FP_FRAC_SUB_4_c1;						\
+      __FP_FRAC_SUB_4_c2 |= __FP_FRAC_SUB_4_c1 && (y1 == x1);		\
+      r2 = x2 - y2;							\
+      __FP_FRAC_SUB_4_c3 = r2 > x2;					\
+      r2 -= __FP_FRAC_SUB_4_c2;						\
+      __FP_FRAC_SUB_4_c3 |= __FP_FRAC_SUB_4_c2 && (y2 == x2);		\
+      r3 = x3 - y3 - __FP_FRAC_SUB_4_c3;				\
+    }									\
+  while (0)
+#endif
+
+#ifndef __FP_FRAC_DEC_3
+# define __FP_FRAC_DEC_3(x2, x1, x0, y2, y1, y0)		\
+  do								\
+    {								\
+      UWtype __FP_FRAC_DEC_3_t0, __FP_FRAC_DEC_3_t1;		\
+      UWtype __FP_FRAC_DEC_3_t2;				\
+      __FP_FRAC_DEC_3_t0 = x0;					\
+      __FP_FRAC_DEC_3_t1 = x1;					\
+      __FP_FRAC_DEC_3_t2 = x2;					\
+      __FP_FRAC_SUB_3 (x2, x1, x0, __FP_FRAC_DEC_3_t2,		\
+		       __FP_FRAC_DEC_3_t1, __FP_FRAC_DEC_3_t0,	\
+		       y2, y1, y0);				\
+    }								\
+  while (0)
+#endif
+
+#ifndef __FP_FRAC_DEC_4
+# define __FP_FRAC_DEC_4(x3, x2, x1, x0, y3, y2, y1, y0)	\
+  do								\
+    {								\
+      UWtype __FP_FRAC_DEC_4_t0, __FP_FRAC_DEC_4_t1;		\
+      UWtype __FP_FRAC_DEC_4_t2, __FP_FRAC_DEC_4_t3;		\
+      __FP_FRAC_DEC_4_t0 = x0;					\
+      __FP_FRAC_DEC_4_t1 = x1;					\
+      __FP_FRAC_DEC_4_t2 = x2;					\
+      __FP_FRAC_DEC_4_t3 = x3;					\
+      __FP_FRAC_SUB_4 (x3, x2, x1, x0, __FP_FRAC_DEC_4_t3,	\
+		       __FP_FRAC_DEC_4_t2, __FP_FRAC_DEC_4_t1,	\
+		       __FP_FRAC_DEC_4_t0, y3, y2, y1, y0);	\
+    }								\
+  while (0)
+#endif
+
+#ifndef __FP_FRAC_ADDI_4
+# define __FP_FRAC_ADDI_4(x3, x2, x1, x0, i)		\
+  do							\
+    {							\
+      UWtype __FP_FRAC_ADDI_4_t;			\
+      __FP_FRAC_ADDI_4_t = ((x0 += i) < i);		\
+      x1 += __FP_FRAC_ADDI_4_t;				\
+      __FP_FRAC_ADDI_4_t = (x1 < __FP_FRAC_ADDI_4_t);	\
+      x2 += __FP_FRAC_ADDI_4_t;				\
+      __FP_FRAC_ADDI_4_t = (x2 < __FP_FRAC_ADDI_4_t);	\
+      x3 += __FP_FRAC_ADDI_4_t;				\
+    }							\
+  while (0)
+#endif
+
+/* Convert FP values between word sizes. This appears to be more
+   complicated than I'd have expected it to be, so these might be
+   wrong... These macros are in any case somewhat bogus because they
+   use information about what various FRAC_n variables look like
+   internally [eg, that 2 word vars are X_f0 and x_f1]. But so do
+   the ones in op-2.h and op-1.h.  */
+#define _FP_FRAC_COPY_1_4(D, S)		(D##_f = S##_f[0])
+
+#define _FP_FRAC_COPY_2_4(D, S)			\
+  do						\
+    {						\
+      D##_f0 = S##_f[0];			\
+      D##_f1 = S##_f[1];			\
+    }						\
+  while (0)
+
+/* Assembly/disassembly for converting to/from integral types.
+   No shifting or overflow handled here.  */
+/* Put the FP value X into r, which is an integer of size rsize.  */
+#define _FP_FRAC_ASSEMBLE_4(r, X, rsize)				\
+  do									\
+    {									\
+      if ((rsize) <= _FP_W_TYPE_SIZE)					\
+	(r) = X##_f[0];							\
+	else if ((rsize) <= 2*_FP_W_TYPE_SIZE)				\
+	{								\
+	  (r) = X##_f[1];						\
+	  (r) = ((rsize) <= _FP_W_TYPE_SIZE				\
+		 ? 0							\
+		 : (r) << _FP_W_TYPE_SIZE);				\
+	  (r) += X##_f[0];						\
+	}								\
+      else								\
+	{								\
+	  /* I'm feeling lazy so we deal with int == 3words		\
+	     (implausible) and int == 4words as a single case.  */	\
+	  (r) = X##_f[3];						\
+	  (r) = ((rsize) <= _FP_W_TYPE_SIZE				\
+		 ? 0							\
+		 : (r) << _FP_W_TYPE_SIZE);				\
+	  (r) += X##_f[2];						\
+	  (r) = ((rsize) <= _FP_W_TYPE_SIZE				\
+		 ? 0							\
+		 : (r) << _FP_W_TYPE_SIZE);				\
+	  (r) += X##_f[1];						\
+	  (r) = ((rsize) <= _FP_W_TYPE_SIZE				\
+		 ? 0							\
+		 : (r) << _FP_W_TYPE_SIZE);				\
+	  (r) += X##_f[0];						\
+	}								\
+    }									\
+  while (0)
+
+/* "No disassemble Number Five!" */
+/* Move an integer of size rsize into X's fractional part. We rely on
+   the _f[] array consisting of words of size _FP_W_TYPE_SIZE to avoid
+   having to mask the values we store into it.  */
+#define _FP_FRAC_DISASSEMBLE_4(X, r, rsize)	\
+  do						\
+    {						\
+      X##_f[0] = (r);				\
+      X##_f[1] = ((rsize) <= _FP_W_TYPE_SIZE	\
+		  ? 0				\
+		  : (r) >> _FP_W_TYPE_SIZE);	\
+      X##_f[2] = ((rsize) <= 2*_FP_W_TYPE_SIZE	\
+		  ? 0				\
+		  : (r) >> 2*_FP_W_TYPE_SIZE);	\
+      X##_f[3] = ((rsize) <= 3*_FP_W_TYPE_SIZE	\
+		  ? 0				\
+		  : (r) >> 3*_FP_W_TYPE_SIZE);	\
+    }						\
+  while (0)
+
+#define _FP_FRAC_COPY_4_1(D, S)			\
+  do						\
+    {						\
+      D##_f[0] = S##_f;				\
+      D##_f[1] = D##_f[2] = D##_f[3] = 0;	\
+    }						\
+  while (0)
+
+#define _FP_FRAC_COPY_4_2(D, S)			\
+  do						\
+    {						\
+      D##_f[0] = S##_f0;			\
+      D##_f[1] = S##_f1;			\
+      D##_f[2] = D##_f[3] = 0;			\
+    }						\
+  while (0)
+
+#define _FP_FRAC_COPY_4_4(D, S)	_FP_FRAC_COPY_4 (D, S)
+
+#endif /* !SOFT_FP_OP_4_H */