2 #if !(defined(__GNUC__) && __GNUC__>=2)
3 # include "../bn_asm.c" /* kind of dirty hack for Sun Studio */
6 * x86_64 BIGNUM accelerator version 0.1, December 2002.
8 * Implemented by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
11 * Rights for redistribution and usage in source and binary forms are
12 * granted according to the OpenSSL license. Warranty of any kind is
15 * Q. Version 0.1? It doesn't sound like Andy, he used to assign real
16 * versions, like 1.0...
17 * A. Well, that's because this code is basically a quick-n-dirty
18 * proof-of-concept hack. As you can see it's implemented with
19 * inline assembler, which means that you're bound to GCC and that
20 * there might be enough room for further improvement.
22 * Q. Why inline assembler?
23 * A. x86_64 features own ABI which I'm not familiar with. This is
24 * why I decided to let the compiler take care of subroutine
25 * prologue/epilogue as well as register allocation. For reference.
26 * Win64 implements different ABI for AMD64, different from Linux.
28 * Q. How much faster does it get?
29 * A. 'apps/openssl speed rsa dsa' output with no-asm:
31 * sign verify sign/s verify/s
32 * rsa 512 bits 0.0006s 0.0001s 1683.8 18456.2
33 * rsa 1024 bits 0.0028s 0.0002s 356.0 6407.0
34 * rsa 2048 bits 0.0172s 0.0005s 58.0 1957.8
35 * rsa 4096 bits 0.1155s 0.0018s 8.7 555.6
36 * sign verify sign/s verify/s
37 * dsa 512 bits 0.0005s 0.0006s 2100.8 1768.3
38 * dsa 1024 bits 0.0014s 0.0018s 692.3 559.2
39 * dsa 2048 bits 0.0049s 0.0061s 204.7 165.0
41 * 'apps/openssl speed rsa dsa' output with this module:
43 * sign verify sign/s verify/s
44 * rsa 512 bits 0.0004s 0.0000s 2767.1 33297.9
45 * rsa 1024 bits 0.0012s 0.0001s 867.4 14674.7
46 * rsa 2048 bits 0.0061s 0.0002s 164.0 5270.0
47 * rsa 4096 bits 0.0384s 0.0006s 26.1 1650.8
48 * sign verify sign/s verify/s
49 * dsa 512 bits 0.0002s 0.0003s 4442.2 3786.3
50 * dsa 1024 bits 0.0005s 0.0007s 1835.1 1497.4
51 * dsa 2048 bits 0.0016s 0.0020s 620.4 504.6
53 * For the reference. IA-32 assembler implementation performs
54 * very much like 64-bit code compiled with no-asm on the same
58 #if defined(_WIN64) || !defined(__LP64__)
59 #define BN_ULONG unsigned long long
61 #define BN_ULONG unsigned long
68 * "m"(a), "+m"(r) is the way to favor DirectPath ยต-code;
69 * "g"(0) let the compiler to decide where does it
70 * want to keep the value of zero;
72 #define mul_add(r,a,word,carry) do { \
73 register BN_ULONG high,low; \
75 : "=a"(low),"=d"(high) \
78 asm ("addq %2,%0; adcq %3,%1" \
79 : "+r"(carry),"+d"(high)\
82 asm ("addq %2,%0; adcq %3,%1" \
83 : "+m"(r),"+d"(high) \
89 #define mul(r,a,word,carry) do { \
90 register BN_ULONG high,low; \
92 : "=a"(low),"=d"(high) \
95 asm ("addq %2,%0; adcq %3,%1" \
96 : "+r"(carry),"+d"(high)\
99 (r)=carry, carry=high; \
102 #define sqr(r0,r1,a) \
104 : "=a"(r0),"=d"(r1) \
108 BN_ULONG bn_mul_add_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w)
112 if (num <= 0) return(c1);
116 mul_add(rp[0],ap[0],w,c1);
117 mul_add(rp[1],ap[1],w,c1);
118 mul_add(rp[2],ap[2],w,c1);
119 mul_add(rp[3],ap[3],w,c1);
120 ap+=4; rp+=4; num-=4;
124 mul_add(rp[0],ap[0],w,c1); if (--num==0) return c1;
125 mul_add(rp[1],ap[1],w,c1); if (--num==0) return c1;
126 mul_add(rp[2],ap[2],w,c1); return c1;
132 BN_ULONG bn_mul_words(BN_ULONG *rp, const BN_ULONG *ap, int num, BN_ULONG w)
136 if (num <= 0) return(c1);
140 mul(rp[0],ap[0],w,c1);
141 mul(rp[1],ap[1],w,c1);
142 mul(rp[2],ap[2],w,c1);
143 mul(rp[3],ap[3],w,c1);
144 ap+=4; rp+=4; num-=4;
148 mul(rp[0],ap[0],w,c1); if (--num == 0) return c1;
149 mul(rp[1],ap[1],w,c1); if (--num == 0) return c1;
150 mul(rp[2],ap[2],w,c1);
155 void bn_sqr_words(BN_ULONG *r, const BN_ULONG *a, int n)
169 sqr(r[0],r[1],a[0]); if (--n == 0) return;
170 sqr(r[2],r[3],a[1]); if (--n == 0) return;
175 BN_ULONG bn_div_words(BN_ULONG h, BN_ULONG l, BN_ULONG d)
176 { BN_ULONG ret,waste;
179 : "=a"(ret),"=d"(waste)
180 : "a"(l),"d"(h),"g"(d)
186 BN_ULONG bn_add_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int n)
190 if (n <= 0) return 0;
193 " subq %0,%0 \n" /* clear carry */
196 "1: movq (%4,%2,8),%0 \n"
197 " adcq (%5,%2,8),%0 \n"
198 " movq %0,(%3,%2,8) \n"
202 : "=&r"(ret),"+c"(n),"+r"(i)
203 : "r"(rp),"r"(ap),"r"(bp)
211 BN_ULONG bn_sub_words (BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,int n)
215 if (n <= 0) return 0;
218 " subq %0,%0 \n" /* clear borrow */
221 "1: movq (%4,%2,8),%0 \n"
222 " sbbq (%5,%2,8),%0 \n"
223 " movq %0,(%3,%2,8) \n"
227 : "=&r"(ret),"+c"(n),"+r"(i)
228 : "r"(rp),"r"(ap),"r"(bp)
235 /* Simics 1.4<7 has buggy sbbq:-( */
236 #define BN_MASK2 0xffffffffffffffffL
237 BN_ULONG bn_sub_words(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b, int n)
242 if (n <= 0) return((BN_ULONG)0);
247 r[0]=(t1-t2-c)&BN_MASK2;
248 if (t1 != t2) c=(t1 < t2);
252 r[1]=(t1-t2-c)&BN_MASK2;
253 if (t1 != t2) c=(t1 < t2);
257 r[2]=(t1-t2-c)&BN_MASK2;
258 if (t1 != t2) c=(t1 < t2);
262 r[3]=(t1-t2-c)&BN_MASK2;
263 if (t1 != t2) c=(t1 < t2);
274 /* mul_add_c(a,b,c0,c1,c2) -- c+=a*b for three word number c=(c2,c1,c0) */
275 /* mul_add_c2(a,b,c0,c1,c2) -- c+=2*a*b for three word number c=(c2,c1,c0) */
276 /* sqr_add_c(a,i,c0,c1,c2) -- c+=a[i]^2 for three word number c=(c2,c1,c0) */
277 /* sqr_add_c2(a,i,c0,c1,c2) -- c+=2*a[i]*a[j] for three word number c=(c2,c1,c0) */
280 /* original macros are kept for reference purposes */
281 #define mul_add_c(a,b,c0,c1,c2) { \
282 BN_ULONG ta=(a),tb=(b); \
284 t2 = BN_UMULT_HIGH(ta,tb); \
285 c0 += t1; t2 += (c0<t1)?1:0; \
286 c1 += t2; c2 += (c1<t2)?1:0; \
289 #define mul_add_c2(a,b,c0,c1,c2) { \
290 BN_ULONG ta=(a),tb=(b),t0; \
291 t1 = BN_UMULT_HIGH(ta,tb); \
293 t2 = t1+t1; c2 += (t2<t1)?1:0; \
294 t1 = t0+t0; t2 += (t1<t0)?1:0; \
295 c0 += t1; t2 += (c0<t1)?1:0; \
296 c1 += t2; c2 += (c1<t2)?1:0; \
299 #define mul_add_c(a,b,c0,c1,c2) do { \
301 : "=a"(t1),"=d"(t2) \
304 asm ("addq %2,%0; adcq %3,%1" \
305 : "+r"(c0),"+d"(t2) \
308 asm ("addq %2,%0; adcq %3,%1" \
309 : "+r"(c1),"+r"(c2) \
314 #define sqr_add_c(a,i,c0,c1,c2) do { \
316 : "=a"(t1),"=d"(t2) \
319 asm ("addq %2,%0; adcq %3,%1" \
320 : "+r"(c0),"+d"(t2) \
323 asm ("addq %2,%0; adcq %3,%1" \
324 : "+r"(c1),"+r"(c2) \
329 #define mul_add_c2(a,b,c0,c1,c2) do { \
331 : "=a"(t1),"=d"(t2) \
334 asm ("addq %0,%0; adcq %2,%1" \
335 : "+d"(t2),"+r"(c2) \
338 asm ("addq %0,%0; adcq %2,%1" \
339 : "+a"(t1),"+d"(t2) \
342 asm ("addq %2,%0; adcq %3,%1" \
343 : "+r"(c0),"+d"(t2) \
346 asm ("addq %2,%0; adcq %3,%1" \
347 : "+r"(c1),"+r"(c2) \
353 #define sqr_add_c2(a,i,j,c0,c1,c2) \
354 mul_add_c2((a)[i],(a)[j],c0,c1,c2)
356 void bn_mul_comba8(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
364 mul_add_c(a[0],b[0],c1,c2,c3);
367 mul_add_c(a[0],b[1],c2,c3,c1);
368 mul_add_c(a[1],b[0],c2,c3,c1);
371 mul_add_c(a[2],b[0],c3,c1,c2);
372 mul_add_c(a[1],b[1],c3,c1,c2);
373 mul_add_c(a[0],b[2],c3,c1,c2);
376 mul_add_c(a[0],b[3],c1,c2,c3);
377 mul_add_c(a[1],b[2],c1,c2,c3);
378 mul_add_c(a[2],b[1],c1,c2,c3);
379 mul_add_c(a[3],b[0],c1,c2,c3);
382 mul_add_c(a[4],b[0],c2,c3,c1);
383 mul_add_c(a[3],b[1],c2,c3,c1);
384 mul_add_c(a[2],b[2],c2,c3,c1);
385 mul_add_c(a[1],b[3],c2,c3,c1);
386 mul_add_c(a[0],b[4],c2,c3,c1);
389 mul_add_c(a[0],b[5],c3,c1,c2);
390 mul_add_c(a[1],b[4],c3,c1,c2);
391 mul_add_c(a[2],b[3],c3,c1,c2);
392 mul_add_c(a[3],b[2],c3,c1,c2);
393 mul_add_c(a[4],b[1],c3,c1,c2);
394 mul_add_c(a[5],b[0],c3,c1,c2);
397 mul_add_c(a[6],b[0],c1,c2,c3);
398 mul_add_c(a[5],b[1],c1,c2,c3);
399 mul_add_c(a[4],b[2],c1,c2,c3);
400 mul_add_c(a[3],b[3],c1,c2,c3);
401 mul_add_c(a[2],b[4],c1,c2,c3);
402 mul_add_c(a[1],b[5],c1,c2,c3);
403 mul_add_c(a[0],b[6],c1,c2,c3);
406 mul_add_c(a[0],b[7],c2,c3,c1);
407 mul_add_c(a[1],b[6],c2,c3,c1);
408 mul_add_c(a[2],b[5],c2,c3,c1);
409 mul_add_c(a[3],b[4],c2,c3,c1);
410 mul_add_c(a[4],b[3],c2,c3,c1);
411 mul_add_c(a[5],b[2],c2,c3,c1);
412 mul_add_c(a[6],b[1],c2,c3,c1);
413 mul_add_c(a[7],b[0],c2,c3,c1);
416 mul_add_c(a[7],b[1],c3,c1,c2);
417 mul_add_c(a[6],b[2],c3,c1,c2);
418 mul_add_c(a[5],b[3],c3,c1,c2);
419 mul_add_c(a[4],b[4],c3,c1,c2);
420 mul_add_c(a[3],b[5],c3,c1,c2);
421 mul_add_c(a[2],b[6],c3,c1,c2);
422 mul_add_c(a[1],b[7],c3,c1,c2);
425 mul_add_c(a[2],b[7],c1,c2,c3);
426 mul_add_c(a[3],b[6],c1,c2,c3);
427 mul_add_c(a[4],b[5],c1,c2,c3);
428 mul_add_c(a[5],b[4],c1,c2,c3);
429 mul_add_c(a[6],b[3],c1,c2,c3);
430 mul_add_c(a[7],b[2],c1,c2,c3);
433 mul_add_c(a[7],b[3],c2,c3,c1);
434 mul_add_c(a[6],b[4],c2,c3,c1);
435 mul_add_c(a[5],b[5],c2,c3,c1);
436 mul_add_c(a[4],b[6],c2,c3,c1);
437 mul_add_c(a[3],b[7],c2,c3,c1);
440 mul_add_c(a[4],b[7],c3,c1,c2);
441 mul_add_c(a[5],b[6],c3,c1,c2);
442 mul_add_c(a[6],b[5],c3,c1,c2);
443 mul_add_c(a[7],b[4],c3,c1,c2);
446 mul_add_c(a[7],b[5],c1,c2,c3);
447 mul_add_c(a[6],b[6],c1,c2,c3);
448 mul_add_c(a[5],b[7],c1,c2,c3);
451 mul_add_c(a[6],b[7],c2,c3,c1);
452 mul_add_c(a[7],b[6],c2,c3,c1);
455 mul_add_c(a[7],b[7],c3,c1,c2);
460 void bn_mul_comba4(BN_ULONG *r, BN_ULONG *a, BN_ULONG *b)
468 mul_add_c(a[0],b[0],c1,c2,c3);
471 mul_add_c(a[0],b[1],c2,c3,c1);
472 mul_add_c(a[1],b[0],c2,c3,c1);
475 mul_add_c(a[2],b[0],c3,c1,c2);
476 mul_add_c(a[1],b[1],c3,c1,c2);
477 mul_add_c(a[0],b[2],c3,c1,c2);
480 mul_add_c(a[0],b[3],c1,c2,c3);
481 mul_add_c(a[1],b[2],c1,c2,c3);
482 mul_add_c(a[2],b[1],c1,c2,c3);
483 mul_add_c(a[3],b[0],c1,c2,c3);
486 mul_add_c(a[3],b[1],c2,c3,c1);
487 mul_add_c(a[2],b[2],c2,c3,c1);
488 mul_add_c(a[1],b[3],c2,c3,c1);
491 mul_add_c(a[2],b[3],c3,c1,c2);
492 mul_add_c(a[3],b[2],c3,c1,c2);
495 mul_add_c(a[3],b[3],c1,c2,c3);
500 void bn_sqr_comba8(BN_ULONG *r, const BN_ULONG *a)
508 sqr_add_c(a,0,c1,c2,c3);
511 sqr_add_c2(a,1,0,c2,c3,c1);
514 sqr_add_c(a,1,c3,c1,c2);
515 sqr_add_c2(a,2,0,c3,c1,c2);
518 sqr_add_c2(a,3,0,c1,c2,c3);
519 sqr_add_c2(a,2,1,c1,c2,c3);
522 sqr_add_c(a,2,c2,c3,c1);
523 sqr_add_c2(a,3,1,c2,c3,c1);
524 sqr_add_c2(a,4,0,c2,c3,c1);
527 sqr_add_c2(a,5,0,c3,c1,c2);
528 sqr_add_c2(a,4,1,c3,c1,c2);
529 sqr_add_c2(a,3,2,c3,c1,c2);
532 sqr_add_c(a,3,c1,c2,c3);
533 sqr_add_c2(a,4,2,c1,c2,c3);
534 sqr_add_c2(a,5,1,c1,c2,c3);
535 sqr_add_c2(a,6,0,c1,c2,c3);
538 sqr_add_c2(a,7,0,c2,c3,c1);
539 sqr_add_c2(a,6,1,c2,c3,c1);
540 sqr_add_c2(a,5,2,c2,c3,c1);
541 sqr_add_c2(a,4,3,c2,c3,c1);
544 sqr_add_c(a,4,c3,c1,c2);
545 sqr_add_c2(a,5,3,c3,c1,c2);
546 sqr_add_c2(a,6,2,c3,c1,c2);
547 sqr_add_c2(a,7,1,c3,c1,c2);
550 sqr_add_c2(a,7,2,c1,c2,c3);
551 sqr_add_c2(a,6,3,c1,c2,c3);
552 sqr_add_c2(a,5,4,c1,c2,c3);
555 sqr_add_c(a,5,c2,c3,c1);
556 sqr_add_c2(a,6,4,c2,c3,c1);
557 sqr_add_c2(a,7,3,c2,c3,c1);
560 sqr_add_c2(a,7,4,c3,c1,c2);
561 sqr_add_c2(a,6,5,c3,c1,c2);
564 sqr_add_c(a,6,c1,c2,c3);
565 sqr_add_c2(a,7,5,c1,c2,c3);
568 sqr_add_c2(a,7,6,c2,c3,c1);
571 sqr_add_c(a,7,c3,c1,c2);
576 void bn_sqr_comba4(BN_ULONG *r, const BN_ULONG *a)
584 sqr_add_c(a,0,c1,c2,c3);
587 sqr_add_c2(a,1,0,c2,c3,c1);
590 sqr_add_c(a,1,c3,c1,c2);
591 sqr_add_c2(a,2,0,c3,c1,c2);
594 sqr_add_c2(a,3,0,c1,c2,c3);
595 sqr_add_c2(a,2,1,c1,c2,c3);
598 sqr_add_c(a,2,c2,c3,c1);
599 sqr_add_c2(a,3,1,c2,c3,c1);
602 sqr_add_c2(a,3,2,c3,c1,c2);
605 sqr_add_c(a,3,c1,c2,c3);