1 /* crypto/bn/bn_lcl.h */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
59 #ifndef HEADER_BN_LCL_H
60 #define HEADER_BN_LCL_H
62 #include <openssl/bn.h>
68 /* Pentium pro 16,16,16,32,64 */
69 /* Alpha 16,16,16,16.64 */
70 #define BN_MULL_SIZE_NORMAL (16) /* 32 */
71 #define BN_MUL_RECURSIVE_SIZE_NORMAL (16) /* 32 less than */
72 #define BN_SQR_RECURSIVE_SIZE_NORMAL (16) /* 32 */
73 #define BN_MUL_LOW_RECURSIVE_SIZE_NORMAL (32) /* 32 */
74 #define BN_MONT_CTX_SET_SIZE_WORD (64) /* 32 */
76 #if !defined(NO_ASM) && !defined(NO_INLINE_ASM) && !defined(PEDANTIC)
78 * BN_UMULT_HIGH section.
80 * No, I'm not trying to overwhelm you when stating that the
81 * product of N-bit numbers is 2*N bits wide:-) No, I don't expect
82 * you to be impressed when I say that if the compiler doesn't
83 * support 2*N integer type, then you have to replace every N*N
84 * multiplication with 4 (N/2)*(N/2) accompanied by some shifts
85 * and additions which unavoidably results in severe performance
86 * penalties. Of course provided that the hardware is capable of
87 * producing 2*N result... That's when you normally start
88 * considering assembler implementation. However! It should be
89 * pointed out that some CPUs (most notably Alpha, PowerPC and
90 * upcoming IA-64 family:-) provide *separate* instruction
91 * calculating the upper half of the product placing the result
92 * into a general purpose register. Now *if* the compiler supports
93 * inline assembler, then it's not impossible to implement the
94 * "bignum" routines (and have the compiler optimize 'em)
95 * exhibiting "native" performance in C. That's what BN_UMULT_HIGH
98 * <appro@fy.chalmers.se>
100 # if defined(__alpha) && (defined(SIXTY_FOUR_BIT_LONG) || defined(SIXTY_FOUR_BIT))
103 # define BN_UMULT_HIGH(a,b) (BN_ULONG)asm("umulh %a0,%a1,%v0",(a),(b))
104 # elif defined(__GNUC__)
105 # define BN_UMULT_HIGH(a,b) ({ \
106 register BN_ULONG ret; \
107 asm ("umulh %1,%2,%0" \
111 # endif /* compiler */
112 # elif defined(_ARCH_PPC) && defined(__64BIT__) && defined(SIXTY_FOUR_BIT_LONG)
113 # if defined(__GNUC__)
114 # define BN_UMULT_HIGH(a,b) ({ \
115 register BN_ULONG ret; \
116 asm ("mulhdu %0,%1,%2" \
120 # endif /* compiler */
124 /*************************************************************
125 * Using the long long type
127 #define Lw(t) (((BN_ULONG)(t))&BN_MASK2)
128 #define Hw(t) (((BN_ULONG)((t)>>BN_BITS2))&BN_MASK2)
130 /* This is used for internal error checking and is not normally used */
133 # define bn_check_top(a) assert ((a)->top >= 0 && (a)->top <= (a)->max);
135 # define bn_check_top(a)
138 /* This macro is to add extra stuff for development checking */
140 #define bn_set_max(r) ((r)->max=(r)->top,BN_set_flags((r),BN_FLG_STATIC_DATA))
142 #define bn_set_max(r)
145 /* These macros are used to 'take' a section of a bignum for read only use */
146 #define bn_set_low(r,a,n) \
148 (r)->top=((a)->top > (n))?(n):(a)->top; \
151 (r)->flags|=BN_FLG_STATIC_DATA; \
155 #define bn_set_high(r,a,n) \
157 if ((a)->top > (n)) \
159 (r)->top=(a)->top-n; \
160 (r)->d= &((a)->d[n]); \
165 (r)->flags|=BN_FLG_STATIC_DATA; \
170 #define mul_add(r,a,w,c) { \
172 t=(BN_ULLONG)w * (a) + (r) + (c); \
177 #define mul(r,a,w,c) { \
179 t=(BN_ULLONG)w * (a) + (c); \
184 #define sqr(r0,r1,a) { \
186 t=(BN_ULLONG)(a)*(a); \
191 #elif defined(BN_UMULT_HIGH)
192 #define mul_add(r,a,w,c) { \
193 BN_ULONG high,low,ret,tmp=(a); \
195 high= BN_UMULT_HIGH(w,tmp); \
198 (c) = (ret<(c))?1:0; \
201 (c) += (ret<low)?1:0; \
205 #define mul(r,a,w,c) { \
206 BN_ULONG high,low,ret,ta=(a); \
208 high= BN_UMULT_HIGH(w,ta); \
211 (c) += (ret<low)?1:0; \
215 #define sqr(r0,r1,a) { \
218 (r1) = BN_UMULT_HIGH(tmp,tmp); \
222 /*************************************************************
226 #define LBITS(a) ((a)&BN_MASK2l)
227 #define HBITS(a) (((a)>>BN_BITS4)&BN_MASK2l)
228 #define L2HBITS(a) ((BN_ULONG)((a)&BN_MASK2l)<<BN_BITS4)
230 #define LLBITS(a) ((a)&BN_MASKl)
231 #define LHBITS(a) (((a)>>BN_BITS2)&BN_MASKl)
232 #define LL2HBITS(a) ((BN_ULLONG)((a)&BN_MASKl)<<BN_BITS2)
234 #define mul64(l,h,bl,bh) \
236 BN_ULONG m,m1,lt,ht; \
244 m=(m+m1)&BN_MASK2; if (m < m1) ht+=L2HBITS(1L); \
247 lt=(lt+m1)&BN_MASK2; if (lt < m1) ht++; \
252 #define sqr64(lo,ho,in) \
262 h+=(m&BN_MASK2h1)>>(BN_BITS4-1); \
263 m =(m&BN_MASK2l)<<(BN_BITS4+1); \
264 l=(l+m)&BN_MASK2; if (l < m) h++; \
269 #define mul_add(r,a,bl,bh,c) { \
275 mul64(l,h,(bl),(bh)); \
277 /* non-multiply part */ \
278 l=(l+(c))&BN_MASK2; if (l < (c)) h++; \
280 l=(l+(c))&BN_MASK2; if (l < (c)) h++; \
285 #define mul(r,a,bl,bh,c) { \
291 mul64(l,h,(bl),(bh)); \
293 /* non-multiply part */ \
294 l+=(c); if ((l&BN_MASK2) < (c)) h++; \
298 #endif /* !BN_LLONG */
300 void bn_mul_normal(BN_ULONG *r,BN_ULONG *a,int na,BN_ULONG *b,int nb);
301 void bn_mul_comba8(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b);
302 void bn_mul_comba4(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b);
303 void bn_sqr_normal(BN_ULONG *r, BN_ULONG *a, int n, BN_ULONG *tmp);
304 void bn_sqr_comba8(BN_ULONG *r,BN_ULONG *a);
305 void bn_sqr_comba4(BN_ULONG *r,BN_ULONG *a);
306 int bn_cmp_words(BN_ULONG *a,BN_ULONG *b,int n);
307 void bn_mul_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,int n2,BN_ULONG *t);
308 void bn_mul_part_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,
309 int tn, int n,BN_ULONG *t);
310 void bn_sqr_recursive(BN_ULONG *r,BN_ULONG *a, int n2, BN_ULONG *t);
311 void bn_mul_low_normal(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b, int n);
312 void bn_mul_low_recursive(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,int n2,
314 void bn_mul_high(BN_ULONG *r,BN_ULONG *a,BN_ULONG *b,BN_ULONG *l,int n2,