kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/lib/mpi/mpi-internal.h
..
..
@@ -1,22 +1,9 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
1
2
 /* mpi-internal.h  -  Internal to the Multi Precision Integers
2
3
  *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
3
4
  *	Copyright (C) 1998, 2000 Free Software Foundation, Inc.
4
5
  *
5
6
  * This file is part of GnuPG.
6
- *
7
- * GnuPG is free software; you can redistribute it and/or modify
8
- * it under the terms of the GNU General Public License as published by
9
- * the Free Software Foundation; either version 2 of the License, or
10
- * (at your option) any later version.
11
- *
12
- * GnuPG is distributed in the hope that it will be useful,
13
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15
- * GNU General Public License for more details.
16
- *
17
- * You should have received a copy of the GNU General Public License
18
- * along with this program; if not, write to the Free Software
19
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
20
7
  *
21
8
  * Note: This code is heavily based on the GNU MP Library.
22
9
  *	 Actually it's the same code with only minor changes in the
..
..
@@ -65,6 +52,12 @@
65
52
 typedef mpi_limb_t *mpi_ptr_t;	/* pointer to a limb */
66
53
 typedef int mpi_size_t;		/* (must be a signed type) */
67
54
 
55
+#define RESIZE_IF_NEEDED(a, b)			\
56
+	do {					\
57
+		if ((a)->alloced < (b))		\
58
+			mpi_resize((a), (b));	\
59
+	} while (0)
60
+
68
61
 /* Copy N limbs from S to D.  */
69
62
 #define MPN_COPY(d, s, n) \
70
63
 	do {					\
..
..
@@ -72,6 +65,14 @@
72
65
 		for (_i = 0; _i < (n); _i++)	\
73
66
 			(d)[_i] = (s)[_i];	\
74
67
 	} while (0)
68
+
69
+#define MPN_COPY_INCR(d, s, n)		\
70
+	do {					\
71
+		mpi_size_t _i;			\
72
+		for (_i = 0; _i < (n); _i++)	\
73
+			(d)[_i] = (s)[_i];	\
74
+	} while (0)
75
+
75
76
 
76
77
 #define MPN_COPY_DECR(d, s, n) \
77
78
 	do {					\
..
..
@@ -104,6 +105,38 @@
104
105
 		else						\
105
106
 			mul_n(prodp, up, vp, size, tspace);	\
106
107
 	} while (0);
108
+
109
+/* Divide the two-limb number in (NH,,NL) by D, with DI being the largest
110
+ * limb not larger than (2**(2*BITS_PER_MP_LIMB))/D - (2**BITS_PER_MP_LIMB).
111
+ * If this would yield overflow, DI should be the largest possible number
112
+ * (i.e., only ones).  For correct operation, the most significant bit of D
113
+ * has to be set.  Put the quotient in Q and the remainder in R.
114
+ */
115
+#define UDIV_QRNND_PREINV(q, r, nh, nl, d, di)				\
116
+	do {								\
117
+		mpi_limb_t _ql __maybe_unused;				\
118
+		mpi_limb_t _q, _r;					\
119
+		mpi_limb_t _xh, _xl;					\
120
+		umul_ppmm(_q, _ql, (nh), (di));				\
121
+		_q += (nh);	/* DI is 2**BITS_PER_MPI_LIMB too small */ \
122
+		umul_ppmm(_xh, _xl, _q, (d));				\
123
+		sub_ddmmss(_xh, _r, (nh), (nl), _xh, _xl);		\
124
+		if (_xh) {						\
125
+			sub_ddmmss(_xh, _r, _xh, _r, 0, (d));		\
126
+			_q++;						\
127
+			if (_xh) {					\
128
+				sub_ddmmss(_xh, _r, _xh, _r, 0, (d));	\
129
+				_q++;					\
130
+			}						\
131
+		}							\
132
+		if (_r >= (d)) {					\
133
+			_r -= (d);					\
134
+			_q++;						\
135
+		}							\
136
+		(r) = _r;						\
137
+		(q) = _q;						\
138
+	} while (0)
139
+
107
140
 
108
141
 /*-- mpiutil.c --*/
109
142
 mpi_ptr_t mpi_alloc_limb_space(unsigned nlimbs);
..
..
@@ -148,6 +181,8 @@
148
181
 void mpih_sqr_n_basecase(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size);
149
182
 void mpih_sqr_n(mpi_ptr_t prodp, mpi_ptr_t up, mpi_size_t size,
150
183
 		mpi_ptr_t tspace);
184
+void mpihelp_mul_n(mpi_ptr_t prodp,
185
+		mpi_ptr_t up, mpi_ptr_t vp, mpi_size_t size);
151
186
 
152
187
 int mpihelp_mul_karatsuba_case(mpi_ptr_t prodp,
153
188
 			       mpi_ptr_t up, mpi_size_t usize,
..
..
@@ -159,9 +194,14 @@
159
194
 			 mpi_size_t s1_size, mpi_limb_t s2_limb);
160
195
 
161
196
 /*-- mpih-div.c --*/
197
+mpi_limb_t mpihelp_mod_1(mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
198
+			 mpi_limb_t divisor_limb);
162
199
 mpi_limb_t mpihelp_divrem(mpi_ptr_t qp, mpi_size_t qextra_limbs,
163
200
 			  mpi_ptr_t np, mpi_size_t nsize,
164
201
 			  mpi_ptr_t dp, mpi_size_t dsize);
202
+mpi_limb_t mpihelp_divmod_1(mpi_ptr_t quot_ptr,
203
+			    mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
204
+			    mpi_limb_t divisor_limb);
165
205
 
166
206
 /*-- generic_mpih-[lr]shift.c --*/
167
207
 mpi_limb_t mpihelp_lshift(mpi_ptr_t wp, mpi_ptr_t up, mpi_size_t usize,