Not yet completed changes to support PPC

19 files changed, 732 insertions, 43 deletions

diff --git a/ChangeLog b/ChangeLog
index 4fd60bb1..9e472db4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,7 +1,11 @@
+Tue Nov 10 19:32:40 1998  Werner Koch  (wk@isil.d.shuttle.de)
+
+	* configure.in (MPI_SFLAGS): New.
+
 Tue Nov 10 13:44:53 1998  Werner Koch  (wk@isil.d.shuttle.de)
 
 	* ABOUT-NLS: New
-	* configure-in (AC_REVISION): New.
+	* configure.in (AC_REVISION): New.
 
 Sun Nov  8 18:20:35 1998  Werner Koch  (wk@isil.d.shuttle.de)
 
diff --git a/configure.in b/configure.in
index e7fec0c9..c7823577 100644
--- a/configure.in
+++ b/configure.in
@@ -231,6 +231,7 @@ if test -f $srcdir/mpi/config.links ; then
     . $srcdir/mpi/config.links
     WK_LINK_FILES($mpi_ln_src, $mpi_ln_dst)
     ac_cv_mpi_extra_asm_modules="$mpi_extra_modules"
+    ac_cv_mpi_sflags="$mpi_sflags"
     ac_cv_mpi_config_done="yes"
     AC_MSG_RESULT(done)
 else
@@ -247,6 +248,8 @@ done
 AC_MSG_RESULT()
 fi
 AC_SUBST(MPI_EXTRA_ASM_OBJS)
+MPI_SFLAGS="$ac_cv_mpi_sflags"
+AC_SUBST(MPI_SFLAGS)
 
 dnl Do we have zlib? Must do it here because Solaris failed
 dnl when compiling a conftest (due to the "-lz" from LIBS).
diff --git a/mpi/ChangeLog b/mpi/ChangeLog
index 893c4c28..1fb336e8 100644
--- a/mpi/ChangeLog
+++ b/mpi/ChangeLog
@@ -1,3 +1,9 @@
+Tue Nov 10 19:31:37 1998  Werner Koch  (wk@isil.d.shuttle.de)
+
+	* power*/ : Started with stuff for PPC
+	* config.links: Some stuff for PPC.
+	* generic/udiv-w-sdiv.c: New but disabled.
+
 Tue Oct 27 12:37:46 1998  Werner Koch  (wk@isil.d.shuttle.de)
 
 	* config.links (freebsd): Fixes for FreeBSD 3.0
diff --git a/mpi/Makefile.am b/mpi/Makefile.am
index 11a18bf5..8a302888 100644
--- a/mpi/Makefile.am
+++ b/mpi/Makefile.am
@@ -2,6 +2,7 @@
 
 INCLUDES =  -I$(top_srcdir)/include
 CFLAGS += -O2
+SFLAGS = @MPI_SFLAGS@
 
 SUFFIXES = .S .s
 
diff --git a/mpi/config.links b/mpi/config.links
index 308733c2..df8d1bb3 100644
--- a/mpi/config.links
+++ b/mpi/config.links
@@ -4,6 +4,7 @@
 
 
 mpi_extra_modules=
+mpi_sflags=
 
 test -d ./mpi || mkdir ./mpi
 
@@ -92,35 +93,59 @@ case "${target}" in
     # Motorola 68k configurations.  Let m68k mean 68020-68040.
     # mc68000 or mc68060 configurations need to be specified explicitly
     m680[234]0*-*-linuxaout* | m68k*-*-linuxaout*)
-	echo '#define MIT_SYNTAX'            >./mpi/asm-syntax.h
+	echo '#define MIT_SYNTAX'           >>./mpi/asm-syntax.h
 	cat  $srcdir/mpi/m68k/syntax.h	    >>./mpi/asm-syntax.h
 	path="m68k/mc68020 m68k"
 	;;
     m68060*-*-linuxaout*)
-	echo '#define MIT_SYNTAX'            >./mpi/asm-syntax.h
+	echo '#define MIT_SYNTAX'           >>./mpi/asm-syntax.h
 	cat  $srcdir/mpi/m68k/syntax.h	    >>./mpi/asm-syntax.h
 	path="m68k"
 	;;
     m680[234]0*-*-linux* | m68k*-*-linux*)
-	echo '#define ELF_SYNTAX'            >./mpi/asm-syntax.h
+	echo '#define ELF_SYNTAX'           >>./mpi/asm-syntax.h
 	cat  $srcdir/mpi/m68k/syntax.h	    >>./mpi/asm-syntax.h
 	path="m68k/mc68020 m68k"
 	;;
     m68060*-*-linux*)
-	echo '#define ELF_SYNTAX'            >./mpi/asm-syntax.h
+	echo '#define ELF_SYNTAX'           >>./mpi/asm-syntax.h
 	cat  $srcdir/mpi/m68k/syntax.h	    >>./mpi/asm-syntax.h
 	path="m68k"
 	;;
     m68000*-*-* | m68060*-*-*)
-	echo '#define MIT_SYNTAX'            >./mpi/asm-syntax.h
+	echo '#define MIT_SYNTAX'           >>./mpi/asm-syntax.h
 	cat  $srcdir/mpi/m68k/syntax.h	    >>./mpi/asm-syntax.h
 	path="m68k/mc68000"
 	;;
     m680[234]0*-*-* | m68k*-*-*)
-	echo '#define MIT_SYNTAX'            >./mpi/asm-syntax.h
+	echo '#define MIT_SYNTAX'           >>./mpi/asm-syntax.h
 	cat  $srcdir/mpi/m68k/syntax.h	    >>./mpi/asm-syntax.h
 	path="m68k/mc68020 m68k"
 	;;
+
+    rs6000-*-aix[456789]* | rs6000-*-aix3.2.[456789])
+	mpi_sflags="-Wa,-mpwr"
+	path="power"
+	mpi_extra_modules="udiv-w-sdiv"
+	;;
+    rs6000-*-* | power-*-* | power2-*-*)
+	mpi_sflags="-Wa,-mppc"
+	path="power"
+	mpi_extra_modules="udiv-w-sdiv"
+	;;
+    ppc601-*-*)
+	mpi_sflags="-Wa,-mppc"
+	path="power powerpc32"
+	;;
+    ppc60[234]*-*-* | powerpc*-*-*)
+	mpi_sflags="-Wa,-mppc"
+	path="powerpc32"
+	;;
+    ppc620-*-* | powerpc64*-*-*)
+	mpi_sflags="-Wa,-mppc"
+	path="powerpc64"
+	;;
+
     *)
 	echo '/* No assembler modules configured */' >>./mpi/asm-syntax.h
 	path=""
diff --git a/mpi/generic/distfiles b/mpi/generic/distfiles
index 02a1ca4c..0bf4600f 100644
--- a/mpi/generic/distfiles
+++ b/mpi/generic/distfiles
@@ -5,4 +5,5 @@ mpih-mul3.c
 mpih-lshift.c
 mpih-rshift.c
 mpih-sub1.c
+udiv-w-sdiv.c
 
diff --git a/mpi/generic/mpih-shift.c b/mpi/generic/mpih-lshift.c
index 2da2edd7..698cd38d 100644
--- a/mpi/generic/mpih-shift.c
+++ b/mpi/generic/mpih-lshift.c
@@ -1,6 +1,5 @@
-/* mpihelp-shift.c  -  MPI helper functions
- *	Copyright (c) 1997 by Werner Koch (dd9jn)
- *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+/* mpihelp-lshift.c  -	MPI helper functions
+ *	Copyright (C) 1994, 1996, 1998 Free Software Foundation, Inc.
  *
  * This file is part of G10.
  *
@@ -68,36 +67,3 @@ mpihelp_lshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
 }
 
 
-/* Shift U (pointed to by UP and USIZE limbs long) CNT bits to the right
- * and store the USIZE least significant limbs of the result at WP.
- * The bits shifted out to the right are returned.
- *
- * Argument constraints:
- * 1. 0 < CNT < BITS_PER_MP_LIMB
- * 2. If the result is to be written over the input, WP must be <= UP.
- */
-
-mpi_limb_t
-mpihelp_rshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize, unsigned cnt)
-{
-    mpi_limb_t high_limb, low_limb;
-    unsigned sh_1, sh_2;
-    mpi_size_t i;
-    mpi_limb_t retval;
-
-    sh_1 = cnt;
-    wp -= 1;
-    sh_2 = BITS_PER_MPI_LIMB - sh_1;
-    high_limb = up[0];
-    retval = high_limb << sh_2;
-    low_limb = high_limb;
-    for( i=1; i < usize; i++) {
-	high_limb = up[i];
-	wp[i] = (low_limb >> sh_1) | (high_limb << sh_2);
-	low_limb = high_limb;
-    }
-    wp[i] = low_limb >> sh_1;
-
-    return retval;
-}
-
diff --git a/mpi/generic/mpih-rshift.c b/mpi/generic/mpih-rshift.c
new file mode 100644
index 00000000..d8ca35f1
--- /dev/null
+++ b/mpi/generic/mpih-rshift.c
@@ -0,0 +1,67 @@
+/* mpih-rshift.c  -  MPI helper functions
+ *	Copyright (C) 1994, 1996, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GNUPG
+ *
+ * GNUPG 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.
+ *
+ * GNUPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * Note: This code is heavily based on the GNU MP Library.
+ *	 Actually it's the same code with only minor changes in the
+ *	 way the data is stored; this is to support the abstraction
+ *	 of an optional secure memory allocation which may be used
+ *	 to avoid revealing of sensitive data due to paging etc.
+ *	 The GNU MP Library itself is published under the LGPL;
+ *	 however I decided to publish this code under the plain GPL.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "mpi-internal.h"
+
+
+/* Shift U (pointed to by UP and USIZE limbs long) CNT bits to the right
+ * and store the USIZE least significant limbs of the result at WP.
+ * The bits shifted out to the right are returned.
+ *
+ * Argument constraints:
+ * 1. 0 < CNT < BITS_PER_MP_LIMB
+ * 2. If the result is to be written over the input, WP must be <= UP.
+ */
+
+mpi_limb_t
+mpihelp_rshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize, unsigned cnt)
+{
+    mpi_limb_t high_limb, low_limb;
+    unsigned sh_1, sh_2;
+    mpi_size_t i;
+    mpi_limb_t retval;
+
+    sh_1 = cnt;
+    wp -= 1;
+    sh_2 = BITS_PER_MPI_LIMB - sh_1;
+    high_limb = up[0];
+    retval = high_limb << sh_2;
+    low_limb = high_limb;
+    for( i=1; i < usize; i++) {
+	high_limb = up[i];
+	wp[i] = (low_limb >> sh_1) | (high_limb << sh_2);
+	low_limb = high_limb;
+    }
+    wp[i] = low_limb >> sh_1;
+
+    return retval;
+}
+
diff --git a/mpi/generic/udiv-w-sdiv.c b/mpi/generic/udiv-w-sdiv.c
new file mode 100644
index 00000000..7ffec099
--- /dev/null
+++ b/mpi/generic/udiv-w-sdiv.c
@@ -0,0 +1,135 @@
+/* mpihelp_udiv_w_sdiv -- implement udiv_qrnnd on machines with only signed
+ *			  division.
+ *
+ * Contributed by Peter L. Montgomery.
+ *
+ * Copyright (C) 1992, 1994, 1996, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "mpi-internal.h"
+#include "longlong.h"
+
+
+#if 0  /* not yet ported to MPI */
+
+mpi_limb_t
+mpihelp_udiv_w_sdiv( mpi_limp_t *rp,
+		     mpi_limp_t *a1,
+		     mpi_limp_t *a0,
+		     mpi_limp_t *d   )
+{
+  mp_limb_t q, r;
+  mp_limb_t c0, c1, b1;
+
+  if ((mpi_limb_signed_t) d >= 0)
+    {
+      if (a1 < d - a1 - (a0 >> (BITS_PER_MP_LIMB - 1)))
+	{
+	  /* dividend, divisor, and quotient are nonnegative */
+	  sdiv_qrnnd (q, r, a1, a0, d);
+	}
+      else
+	{
+	  /* Compute c1*2^32 + c0 = a1*2^32 + a0 - 2^31*d */
+	  sub_ddmmss (c1, c0, a1, a0, d >> 1, d << (BITS_PER_MP_LIMB - 1));
+	  /* Divide (c1*2^32 + c0) by d */
+	  sdiv_qrnnd (q, r, c1, c0, d);
+	  /* Add 2^31 to quotient */
+	  q += (mp_limb_t) 1 << (BITS_PER_MP_LIMB - 1);
+	}
+    }
+  else
+    {
+      b1 = d >> 1;			/* d/2, between 2^30 and 2^31 - 1 */
+      c1 = a1 >> 1;			/* A/2 */
+      c0 = (a1 << (BITS_PER_MP_LIMB - 1)) + (a0 >> 1);
+
+      if (a1 < b1)			/* A < 2^32*b1, so A/2 < 2^31*b1 */
+	{
+	  sdiv_qrnnd (q, r, c1, c0, b1); /* (A/2) / (d/2) */
+
+	  r = 2*r + (a0 & 1);		/* Remainder from A/(2*b1) */
+	  if ((d & 1) != 0)
+	    {
+	      if (r >= q)
+		r = r - q;
+	      else if (q - r <= d)
+		{
+		  r = r - q + d;
+		  q--;
+		}
+	      else
+		{
+		  r = r - q + 2*d;
+		  q -= 2;
+		}
+	    }
+	}
+      else if (c1 < b1) 		/* So 2^31 <= (A/2)/b1 < 2^32 */
+	{
+	  c1 = (b1 - 1) - c1;
+	  c0 = ~c0;			/* logical NOT */
+
+	  sdiv_qrnnd (q, r, c1, c0, b1); /* (A/2) / (d/2) */
+
+	  q = ~q;			/* (A/2)/b1 */
+	  r = (b1 - 1) - r;
+
+	  r = 2*r + (a0 & 1);		/* A/(2*b1) */
+
+	  if ((d & 1) != 0)
+	    {
+	      if (r >= q)
+		r = r - q;
+	      else if (q - r <= d)
+		{
+		  r = r - q + d;
+		  q--;
+		}
+	      else
+		{
+		  r = r - q + 2*d;
+		  q -= 2;
+		}
+	    }
+	}
+      else				/* Implies c1 = b1 */
+	{				/* Hence a1 = d - 1 = 2*b1 - 1 */
+	  if (a0 >= -d)
+	    {
+	      q = -1;
+	      r = a0 + d;
+	    }
+	  else
+	    {
+	      q = -2;
+	      r = a0 + 2*d;
+	    }
+	}
+    }
+
+  *rp = r;
+  return q;
+}
+
+#endif
+
diff --git a/mpi/power/distfiles b/mpi/power/distfiles
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/mpi/power/distfiles
diff --git a/mpi/powerpc32/distfiles b/mpi/powerpc32/distfiles
new file mode 100644
index 00000000..2a6f0e5c
--- /dev/null
+++ b/mpi/powerpc32/distfiles
@@ -0,0 +1,8 @@
+mpih-add1.S
+mpih-sub1.S
+mpih-mul1.S
+mpih-mul2.S
+mpih-mul3.S
+mpih-lshift.S
+mpih-rshift.S
+
diff --git a/mpi/powerpc32/mpih-add1.S b/mpi/powerpc32/mpih-add1.S
new file mode 100644
index 00000000..b4c00df9
--- /dev/null
+++ b/mpi/powerpc32/mpih-add1.S
@@ -0,0 +1,60 @@
+/* PowerPC-32 add_n -- Add two limb vectors of equal, non-zero length.
+ *
+ * Copyright (C) 1992, 1994, 1995, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+
+/*******************
+ *  mpi_limb_t
+ *  mpihelp_add_n( mpi_ptr_t res_ptr,	(r3)
+ *		   mpi_ptr_t s1_ptr,	(r4)
+ *		   mpi_ptr_t s2_ptr,	(r5)
+ *		   mpi_size_t size)	(r6)
+ */
+
+	.toc
+	.extern mpihelp_add_n[DS]
+	.extern .mpihelp_add_n
+.csect [PR]
+	.align 2
+	.globl mpihelp_add_n
+	.globl .mpihelp_add_n
+	.csect mpihelp_add_n[DS]
+mpihelp_add_n:
+	.long .mpihelp_add_n, TOC[tc0], 0
+	.csect [PR]
+.mpihelp_add_n:
+	mtctr	6		# copy size into CTR
+	lwz	8,0(4)		# load least significant s1 limb
+	lwz	0,0(5)		# load least significant s2 limb
+	addi	3,3,-4		# offset res_ptr, it's updated before used
+	addc	7,0,8		# add least significant limbs, set cy
+	bdz	Lend		# If done, skip loop
+Loop:	lwzu	8,4(4)		# load s1 limb and update s1_ptr
+	lwzu	0,4(5)		# load s2 limb and update s2_ptr
+	stwu	7,4(3)		# store previous limb in load latency slot
+	adde	7,0,8		# add new limbs with cy, set cy
+	bdnz	Loop		# decrement CTR and loop back
+Lend:	stw	7,4(3)		# store ultimate result limb
+	li	3,0		# load cy into ...
+	addze	3,3		# ... return value register
+	blr
+
+
diff --git a/mpi/powerpc32/mpih-lshift.S b/mpi/powerpc32/mpih-lshift.S
new file mode 100644
index 00000000..eb5bd503
--- /dev/null
+++ b/mpi/powerpc32/mpih-lshift.S
@@ -0,0 +1,71 @@
+/* PowerPC-32 lshift
+ *
+ *	Copyright (C) 1995, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+/*******************
+ * mpi_limb_t
+ * mpihelp_lshift( mpi_ptr_t wp,	(r3)
+ *		   mpi_ptr_t up,	(r4)
+ *		   mpi_size_t usize,	(r5)
+ *		   unsigned cnt)	(r6)
+ */
+
+	.toc
+.csect	.text[PR]
+	.align	2
+	.globl	mpihelp_lshift
+	.globl	.mpihelp_lshift
+	.csect	mpihelp_lshift[DS]
+mpihelp_lshift:
+	.long	.mpihelp_lshift,  TOC[tc0],	  0
+	.csect	.text[PR]
+.mpihelp_lshift:
+	mtctr	5		# copy size into CTR
+	slwi	0,5,2
+	add	7,3,0		# make r7 point at end of res
+	add	4,4,0		# make r4 point at end of s1
+	subfic	8,6,32
+	lwzu	11,-4(4)	# load first s1 limb
+	srw	3,11,8		# compute function return value
+	bdz	Lend1
+
+Loop:	lwzu	10,-4(4)
+	slw	9,11,6
+	srw	12,10,8
+	or	9,9,12
+	stwu	9,-4(7)
+	bdz	Lend2
+	lwzu	11,-4(4)
+	slw	9,10,6
+	srw	12,11,8
+	or	9,9,12
+	stwu	9,-4(7)
+	bdnz	Loop
+
+Lend1:	slw	0,11,6
+	stw	0,-4(7)
+	blr
+
+Lend2:	slw	0,10,6
+	stw	0,-4(7)
+	blr
+
+
diff --git a/mpi/powerpc32/mpih-mul1.S b/mpi/powerpc32/mpih-mul1.S
new file mode 100644
index 00000000..854624d1
--- /dev/null
+++ b/mpi/powerpc32/mpih-mul1.S
@@ -0,0 +1,67 @@
+/* PowerPC-32 mul_1 -- Multiply a limb vector with a limb and store
+ *		       the result in a second limb vector.
+ *
+ * Copyright (C) 1993, 1994, 1995, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+/*******************
+ * mpi_limb_t
+ * mpihelp_mul_1( mpi_ptr_t res_ptr,	(r3)
+ *		  mpi_ptr_t s1_ptr,	(r4)
+ *		  mpi_size_t s1_size,	(r5)
+ *		  mpi_limb_t s2_limb)	(r6)
+ *
+ * This is a fairly straightforward implementation.  The timing of the PC601
+ * is hard to understand, so I will wait to optimize this until I have some
+ * hardware to play with.
+ *
+ * The code trivially generalizes to 64 bit limbs for the PC620.
+ */
+
+	.toc
+	.csect .mpihelp_mul_1[PR]
+	.align 2
+	.globl mpihelp_mul_1
+	.globl .mpihelp_mul_1
+	.csect mpihelp_mul_1[DS]
+mpihelp_mul_1:
+	.long .mpihelp_mul_1[PR], TOC[tc0], 0
+	.csect .mpihelp_mul_1[PR]
+.mpihelp_mul_1:
+	mtctr	5
+
+	lwz	0,0(4)
+	mullw	7,0,6
+	mulhwu	10,0,6
+	addi	3,3,-4		# adjust res_ptr
+	addic	5,5,0		# clear cy with dummy insn
+	bdz	Lend
+
+Loop:	lwzu	0,4(4)
+	stwu	7,4(3)
+	mullw	8,0,6
+	adde	7,8,10
+	mulhwu	10,0,6
+	bdnz	Loop
+
+Lend:	stw	7,4(3)
+	addze	3,10
+	blr
+
diff --git a/mpi/powerpc32/mpih-mul2.S b/mpi/powerpc32/mpih-mul2.S
new file mode 100644
index 00000000..0b6486ee
--- /dev/null
+++ b/mpi/powerpc32/mpih-mul2.S
@@ -0,0 +1,73 @@
+/* PowerPC-32 addmul_1 -- Multiply a limb vector with a limb and add
+ *			  the result to a second limb vector.
+
+ * Copyright (C) 1995, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+/*******************
+ * mpi_limb_t
+ * mpihelp_addmul_1( mpi_ptr_t res_ptr,      (r3)
+ *		     mpi_ptr_t s1_ptr,	     (r4)
+ *		     mpi_size_t s1_size,     (r5)
+ *		     mpi_limb_t s2_limb)     (r6)
+ *
+ * This is a fairly straightforward implementation.  The timing of the PC601
+ * is hard to understand, so I will wait to optimize this until I have some
+ * hardware to play with.
+ *
+ * The code trivially generalizes to 64 bit limbs for the PC620.
+ */
+
+
+	.toc
+	.csect .mpihelp_addmul_1[PR]
+	.align 2
+	.globl mpihelp_addmul_1
+	.globl .mpihelp_addmul_1
+	.csect mpihelp_addmul_1[DS]
+mpihelp_addmul_1:
+	.long .mpihelp_addmul_1[PR], TOC[tc0], 0
+	.csect .mpihelp_addmul_1[PR]
+.mpihelp_addmul_1:
+	mtctr	5
+
+	lwz	0,0(4)
+	mullw	7,0,6
+	mulhwu	10,0,6
+	lwz	9,0(3)
+	addc	8,7,9
+	addi	3,3,-4
+	bdz	Lend
+
+Loop:	lwzu	0,4(4)
+	stwu	8,4(3)
+	mullw	8,0,6
+	adde	7,8,10
+	mulhwu	10,0,6
+	lwz	9,4(3)
+	addze	10,10
+	addc	8,7,9
+	bdnz	Loop
+
+Lend:	stw	8,4(3)
+	addze	3,10
+	blr
+
+
diff --git a/mpi/powerpc32/mpih-mul3.S b/mpi/powerpc32/mpih-mul3.S
new file mode 100644
index 00000000..46e85f68
--- /dev/null
+++ b/mpi/powerpc32/mpih-mul3.S
@@ -0,0 +1,74 @@
+/* PowerPC-32 submul_1 -- Multiply a limb vector with a limb and subtract
+ *			  the result from a second limb vector.
+ *
+ * Copyright (C) 1995, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+/*******************
+ * mpi_limb_t
+ * mpihelp_submul_1( mpi_ptr_t res_ptr,      (r3)
+ *		     mpi_ptr_t s1_ptr,	     (r4)
+ *		     mpi_size_t s1_size,     (r5)
+ *		     mpi_limb_t s2_limb)     (r6)
+ *
+ * This is a fairly straightforward implementation.  The timing of the PC601
+ * is hard to understand, so I will wait to optimize this until I have some
+ * hardware to play with.
+ *
+ * The code trivially generalizes to 64 bit limbs for the PC620.
+ */
+
+	.toc
+	.csect .mpihelp_submul_1[PR]
+	.align 2
+	.globl mpihelp_submul_1
+	.globl .mpihelp_submul_1
+	.csect mpihelp_submul_1[DS]
+mpihelp_submul_1:
+	.long .mpihelp_submul_1[PR], TOC[tc0], 0
+	.csect .mpihelp_submul_1[PR]
+.mpihelp_submul_1:
+	mtctr	5
+
+	lwz	0,0(4)
+	mullw	7,0,6
+	mulhwu	10,0,6
+	lwz	9,0(3)
+	subfc	8,7,9
+	addc	7,7,8		# invert cy (r7 is junk)
+	addi	3,3,-4
+	bdz	Lend
+
+Loop:	lwzu	0,4(4)
+	stwu	8,4(3)
+	mullw	8,0,6
+	adde	7,8,10
+	mulhwu	10,0,6
+	lwz	9,4(3)
+	addze	10,10
+	subfc	8,7,9
+	addc	7,7,8		# invert cy (r7 is junk)
+	bdnz	Loop
+
+Lend:	stw	8,4(3)
+	addze	3,10
+	blr
+
+
diff --git a/mpi/powerpc32/mpih-rshift.S b/mpi/powerpc32/mpih-rshift.S
new file mode 100644
index 00000000..9d707591
--- /dev/null
+++ b/mpi/powerpc32/mpih-rshift.S
@@ -0,0 +1,68 @@
+/* PowerPC-32 rshift
+ *
+ *	Copyright (C) 1995, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+/*******************
+ * mpi_limb_t
+ * mpihelp_rshift( mpi_ptr_t wp,	(r3)
+ *		   mpi_ptr_t up,	(r4)
+ *		   mpi_size_t usize,	(r5)
+ *		   unsigned cnt)	(r6)
+ */
+
+	.toc
+.csect	.text[PR]
+	.align	2
+	.globl	mpihelp_rshift
+	.globl	.mpihelp_rshift
+	.csect	mpihelp_rshift[DS]
+mpihelp_rshift:
+	.long	.mpihelp_rshift,  TOC[tc0],	  0
+	.csect	.text[PR]
+.mpihelp_rshift:
+	mtctr	5		# copy size into CTR
+	addi	7,3,-4		# move adjusted res_ptr to free return reg
+	subfic	8,6,32
+	lwz	11,0(4) 	# load first s1 limb
+	slw	3,11,8		# compute function return value
+	bdz	Lend1
+
+Loop:	lwzu	10,4(4)
+	srw	9,11,6
+	slw	12,10,8
+	or	9,9,12
+	stwu	9,4(7)
+	bdz	Lend2
+	lwzu	11,4(4)
+	srw	9,10,6
+	slw	12,11,8
+	or	9,9,12
+	stwu	9,4(7)
+	bdnz	Loop
+
+Lend1:	srw	0,11,6
+	stw	0,4(7)
+	blr
+
+Lend2:	srw	0,10,6
+	stw	0,4(7)
+	blr
+
diff --git a/mpi/powerpc32/mpih-sub1.S b/mpi/powerpc32/mpih-sub1.S
new file mode 100644
index 00000000..b2e0590f
--- /dev/null
+++ b/mpi/powerpc32/mpih-sub1.S
@@ -0,0 +1,60 @@
+/* PowerPC-32  sub_n -- Subtract two limb vectors of the same length > 0
+ *			and store difference in a third limb vector.
+ *
+ * Copyright (C) 1992, 1994, 1995, 1998 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG 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.
+ *
+ * GnuPG 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+
+/*******************
+ *  mpi_limb_t
+ *  mpihelp_sub_n( mpi_ptr_t res_ptr,	(r3)
+ *		   mpi_ptr_t s1_ptr,	(r4)
+ *		   mpi_ptr_t s2_ptr,	(r5)
+ *		   mpi_size_t size)	(r6)
+ */
+
+	.toc
+	.extern mpihelp_sub_n[DS]
+	.extern .mpihelp_sub_n
+.csect [PR]
+	.align 2
+	.globl mpihelp_sub_n
+	.globl .mpihelp_sub_n
+	.csect mpihelp_sub_n[DS]
+mpihelp_sub_n:
+	.long .mpihelp_sub_n, TOC[tc0], 0
+	.csect [PR]
+.mpihelp_sub_n:
+	mtctr	6		# copy size into CTR
+	lwz	8,0(4)		# load least significant s1 limb
+	lwz	0,0(5)		# load least significant s2 limb
+	addi	3,3,-4		# offset res_ptr, it's updated before used
+	subfc	7,0,8		# add least significant limbs, set cy
+	bdz	Lend		# If done, skip loop
+Loop:	lwzu	8,4(4)		# load s1 limb and update s1_ptr
+	lwzu	0,4(5)		# load s2 limb and update s2_ptr
+	stwu	7,4(3)		# store previous limb in load latency slot
+	subfe	7,0,8		# add new limbs with cy, set cy
+	bdnz	Loop		# decrement CTR and loop back
+Lend:	stw	7,4(3)		# store ultimate result limb
+	subfe	3,0,0		# load !cy into ...
+	subfic	3,3,0		# ... return value register
+	blr
+
+
diff --git a/mpi/powerpc64/distfiles b/mpi/powerpc64/distfiles
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/mpi/powerpc64/distfiles