added assembler modules

6 files changed, 431 insertions, 0 deletions

diff --git a/mpi/generic/mpih-add1.c b/mpi/generic/mpih-add1.c
new file mode 100644
index 00000000..e66c6686
--- /dev/null
+++ b/mpi/generic/mpih-add1.c
@@ -0,0 +1,65 @@
+/* mpihelp-add_1.c  -  MPI helper functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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"
+#include "longlong.h"
+
+mpi_limb_t
+mpihelp_add_n( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+	       mpi_ptr_t s2_ptr, mpi_size_t size)
+{
+    mpi_limb_t x, y, cy;
+    mpi_size_t j;
+
+    /* The loop counter and index J goes from -SIZE to -1.  This way
+       the loop becomes faster.  */
+    j = -size;
+
+    /* Offset the base pointers to compensate for the negative indices. */
+    s1_ptr -= j;
+    s2_ptr -= j;
+    res_ptr -= j;
+
+    cy = 0;
+    do {
+	y = s2_ptr[j];
+	x = s1_ptr[j];
+	y += cy;		  /* add previous carry to one addend */
+	cy = y < cy;		  /* get out carry from that addition */
+	y += x; 		  /* add other addend */
+	cy += y < x;		  /* get out carry from that add, combine */
+	res_ptr[j] = y;
+    } while( ++j );
+
+    return cy;
+}
+
diff --git a/mpi/generic/mpih-mul1.c b/mpi/generic/mpih-mul1.c
new file mode 100644
index 00000000..e84eccce
--- /dev/null
+++ b/mpi/generic/mpih-mul1.c
@@ -0,0 +1,62 @@
+/* mpihelp-mul_1.c  -  MPI helper functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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"
+#include "longlong.h"
+
+mpi_limb_t
+mpihelp_mul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr, mpi_size_t s1_size,
+						    mpi_limb_t s2_limb)
+{
+    mpi_limb_t cy_limb;
+    mpi_size_t j;
+    mpi_limb_t prod_high, prod_low;
+
+    /* The loop counter and index J goes from -S1_SIZE to -1.  This way
+     * the loop becomes faster.  */
+    j = -s1_size;
+
+    /* Offset the base pointers to compensate for the negative indices.  */
+    s1_ptr -= j;
+    res_ptr -= j;
+
+    cy_limb = 0;
+    do {
+	umul_ppmm( prod_high, prod_low, s1_ptr[j], s2_limb );
+	prod_low += cy_limb;
+	cy_limb = (prod_low < cy_limb?1:0) + prod_high;
+	res_ptr[j] = prod_low;
+    } while( ++j );
+
+    return cy_limb;
+}
+
diff --git a/mpi/generic/mpih-mul2.c b/mpi/generic/mpih-mul2.c
new file mode 100644
index 00000000..d77ec802
--- /dev/null
+++ b/mpi/generic/mpih-mul2.c
@@ -0,0 +1,67 @@
+/* mpihelp-mul_2.c  -  MPI helper functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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"
+#include "longlong.h"
+
+
+mpi_limb_t
+mpihelp_addmul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+		  mpi_size_t s1_size, mpi_limb_t s2_limb)
+{
+    mpi_limb_t cy_limb;
+    mpi_size_t j;
+    mpi_limb_t prod_high, prod_low;
+    mpi_limb_t x;
+
+    /* The loop counter and index J goes from -SIZE to -1.  This way
+     * the loop becomes faster.  */
+    j = -s1_size;
+    res_ptr -= j;
+    s1_ptr -= j;
+
+    cy_limb = 0;
+    do {
+	umul_ppmm( prod_high, prod_low, s1_ptr[j], s2_limb );
+
+	prod_low += cy_limb;
+	cy_limb = (prod_low < cy_limb?1:0) + prod_high;
+
+	x = res_ptr[j];
+	prod_low = x + prod_low;
+	cy_limb += prod_low < x?1:0;
+	res_ptr[j] = prod_low;
+    } while ( ++j );
+    return cy_limb;
+}
+
+
diff --git a/mpi/generic/mpih-mul3.c b/mpi/generic/mpih-mul3.c
new file mode 100644
index 00000000..c7c4e189
--- /dev/null
+++ b/mpi/generic/mpih-mul3.c
@@ -0,0 +1,68 @@
+/* mpihelp-mul_3.c  -  MPI helper functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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"
+#include "longlong.h"
+
+
+mpi_limb_t
+mpihelp_submul_1( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+		  mpi_size_t s1_size, mpi_limb_t s2_limb)
+{
+    mpi_limb_t cy_limb;
+    mpi_size_t j;
+    mpi_limb_t prod_high, prod_low;
+    mpi_limb_t x;
+
+    /* The loop counter and index J goes from -SIZE to -1.  This way
+     * the loop becomes faster.  */
+    j = -s1_size;
+    res_ptr -= j;
+    s1_ptr -= j;
+
+    cy_limb = 0;
+    do {
+	umul_ppmm( prod_high, prod_low, s1_ptr[j], s2_limb);
+
+	prod_low += cy_limb;
+	cy_limb = (prod_low < cy_limb?1:0) + prod_high;
+
+	x = res_ptr[j];
+	prod_low = x - prod_low;
+	cy_limb += prod_low > x?1:0;
+	res_ptr[j] = prod_low;
+    } while( ++j );
+
+    return cy_limb;
+}
+
+
diff --git a/mpi/generic/mpih-shift.c b/mpi/generic/mpih-shift.c
new file mode 100644
index 00000000..2da2edd7
--- /dev/null
+++ b/mpi/generic/mpih-shift.c
@@ -0,0 +1,103 @@
+/* mpihelp-shift.c  -  MPI helper functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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 digits long) CNT bits to the left
+ * and store the USIZE least significant digits of the result at WP.
+ * Return the bits shifted out from the most significant digit.
+ *
+ * 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_lshift( mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,
+					    unsigned int 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;
+    i = usize - 1;
+    low_limb = up[i];
+    retval = low_limb >> sh_2;
+    high_limb = low_limb;
+    while( --i >= 0 ) {
+	low_limb = up[i];
+	wp[i] = (high_limb << sh_1) | (low_limb >> sh_2);
+	high_limb = low_limb;
+    }
+    wp[i] = high_limb << sh_1;
+
+    return retval;
+}
+
+
+/* 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-sub1.c b/mpi/generic/mpih-sub1.c
new file mode 100644
index 00000000..2c38ff06
--- /dev/null
+++ b/mpi/generic/mpih-sub1.c
@@ -0,0 +1,66 @@
+/* mpihelp-add_2.c  -  MPI helper functions
+ *	Copyright (c) 1997 by Werner Koch (dd9jn)
+ *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
+ *
+ * This file is part of G10.
+ *
+ * G10 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.
+ *
+ * G10 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"
+#include "longlong.h"
+
+mpi_limb_t
+mpihelp_sub_n( mpi_ptr_t res_ptr, mpi_ptr_t s1_ptr,
+				  mpi_ptr_t s2_ptr, mpi_size_t size)
+{
+    mpi_limb_t x, y, cy;
+    mpi_size_t j;
+
+    /* The loop counter and index J goes from -SIZE to -1.  This way
+       the loop becomes faster.  */
+    j = -size;
+
+    /* Offset the base pointers to compensate for the negative indices.  */
+    s1_ptr -= j;
+    s2_ptr -= j;
+    res_ptr -= j;
+
+    cy = 0;
+    do {
+	y = s2_ptr[j];
+	x = s1_ptr[j];
+	y += cy;		  /* add previous carry to subtrahend */
+	cy = y < cy;		  /* get out carry from that addition */
+	y = x - y;		  /* main subtract */
+	cy += y > x;		  /* get out carry from the subtract, combine */
+	res_ptr[j] = y;
+    } while( ++j );
+
+    return cy;
+}
+
+