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26f5e9d21ccf10ff447c68e4a28be2e723055356
busybox/networking/tls_pstm_sqr_comba.c
Denys Vlasenko 37bdd8f8cb tls: pstm code shrink 
Optimize ABI calling convention and "dead code" cases where return value
is known to be always "success".

function                                             old     new   delta
pstm_mod                                             113    1227   +1114
pstm_exptmod                                        1463    1532     +69
pstm_montgomery_reduce                               381     393     +12
pstm_sqr_comba                                       478     487      +9
pstm_mul_comba                                       447     452      +5
der_binary_to_pstm                                    42      45      +3
pstm_count_bits                                       48      46      -2
pstm_clear                                            72      70      -2
pstm_clamp                                            57      55      -2
pstm_zero                                             38      34      -4
pstm_init_size                                        46      42      -4
pstm_init_for_read_unsigned_bin                       24      20      -4
pstm_grow                                             72      68      -4
pstm_unsigned_bin_size                                37      32      -5
pstm_cmp_mag                                          78      72      -6
pstm_copy                                             92      84      -8
pstm_mul_d                                           224     215      -9
pstm_rshd                                            104      94     -10
pstm_mul_2                                           156     146     -10
tls_handshake                                       2085    2072     -13
psRsaEncryptPub                                      421     408     -13
pstm_lshd                                            109      95     -14
pstm_cmp                                              54      39     -15
s_pstm_sub                                           228     212     -16
pstm_init_copy                                        72      52     -20
pstm_read_unsigned_bin                               109      88     -21
pstm_mulmod                                          120      99     -21
s_pstm_add                                           337     314     -23
pstm_add                                             108      84     -24
pstm_mul_2d                                          186     161     -25
pstm_sub                                             102      74     -28
pstm_to_unsigned_bin                                 151     120     -31
pstm_set                                              34       -     -34
pstm_div_2d                                          409     373     -36
pstm_init                                             42       -     -42
pstm_exch                                             50       -     -50
pstm_montgomery_setup                                 89       -     -89
pstm_2expt                                            96       -     -96
pstm_montgomery_calc_normalization                   140       -    -140
pstm_div                                            1522       -   -1522
------------------------------------------------------------------------------
(add/remove: 0/7 grow/shrink: 6/27 up/down: 1212/-2343)     Total: -1131 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2019-01-01 15:40:43 +01:00

1114 lines
43 KiB
C
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/*
* Copyright (C) 2017 Denys Vlasenko
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#include "tls.h"
/* The file is taken almost verbatim from matrixssl-3-7-2b-open/crypto/math/.
* Changes are flagged with //bbox
*/
/**
* @file pstm_sqr_comba.c
* @version 33ef80f (HEAD, tag: MATRIXSSL-3-7-2-OPEN, tag: MATRIXSSL-3-7-2-COMM, origin/master, origin/HEAD, master)
*
* Multiprecision Squaring with Comba technique.
*/
/*
* Copyright (c) 2013-2015 INSIDE Secure Corporation
* Copyright (c) PeerSec Networks, 2002-2011
* All Rights Reserved
*
* The latest version of this code is available at http://www.matrixssl.org
*
* This software is open source; 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.
*
* This General Public License does NOT permit incorporating this software
* into proprietary programs. If you are unable to comply with the GPL, a
* commercial license for this software may be purchased from INSIDE at
* http://www.insidesecure.com/eng/Company/Locations
*
* This program is distributed in 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
* http://www.gnu.org/copyleft/gpl.html
*/
/******************************************************************************/
//bbox
//#include "../cryptoApi.h"
#ifndef DISABLE_PSTM
/******************************************************************************/
#if defined(PSTM_X86)
/* x86-32 optimized for 32 bit platforms. For 64 bit mode use X86_64 instead */
#if !defined(__GNUC__) || !defined(__i386__)
#error "PSTM_X86 option requires GCC and 32 bit mode x86 processor"
#endif
//#pragma message ("Using 32 bit x86 Assembly Optimizations")
#define COMBA_START
#define CLEAR_CARRY \
c0 = c1 = c2 = 0;
#define COMBA_STORE(x) \
x = c0;
#define COMBA_STORE2(x) \
x = c1;
#define CARRY_FORWARD \
do { c0 = c1; c1 = c2; c2 = 0; } while (0);
#define COMBA_FINI
#define SQRADD(i, j) \
asm( \
"movl %6,%%eax \n\t" \
"mull %%eax \n\t" \
"addl %%eax,%0 \n\t" \
"adcl %%edx,%1 \n\t" \
"adcl $0,%2 \n\t" \
:"=rm"(c0), "=rm"(c1), "=rm"(c2): "0"(c0), "1"(c1), "2"(c2), "m"(i) :"%eax","%edx","%cc");
//bbox: ^^^ replaced "=r" with "=rm": %ebx is not available on shared build
#define SQRADD2(i, j) \
asm( \
"movl %6,%%eax \n\t" \
"mull %7 \n\t" \
"addl %%eax,%0 \n\t" \
"adcl %%edx,%1 \n\t" \
"adcl $0,%2 \n\t" \
"addl %%eax,%0 \n\t" \
"adcl %%edx,%1 \n\t" \
"adcl $0,%2 \n\t" \
:"=rm"(c0), "=rm"(c1), "=rm"(c2): "0"(c0), "1"(c1), "2"(c2), "m"(i), "m"(j) :"%eax","%edx","%cc");
//bbox: ^^^ replaced "=r" with "=rm": %ebx is not available on shared build
#define SQRADDSC(i, j) \
asm( \
"movl %6,%%eax \n\t" \
"mull %7 \n\t" \
"movl %%eax,%0 \n\t" \
"movl %%edx,%1 \n\t" \
"xorl %2,%2 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%eax","%edx","%cc");
#define SQRADDAC(i, j) \
asm( \
"movl %6,%%eax \n\t" \
"mull %7 \n\t" \
"addl %%eax,%0 \n\t" \
"adcl %%edx,%1 \n\t" \
"adcl $0,%2 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%eax","%edx","%cc");
#define SQRADDDB \
asm( \
"addl %6,%0 \n\t" \
"adcl %7,%1 \n\t" \
"adcl %8,%2 \n\t" \
"addl %6,%0 \n\t" \
"adcl %7,%1 \n\t" \
"adcl %8,%2 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2) : "0"(c0), "1"(c1), "2"(c2), "r"(sc0), "r"(sc1), "r"(sc2) : "%cc");
/******************************************************************************/
#elif defined(PSTM_X86_64)
/* x86-64 optimized */
#if !defined(__GNUC__) || !defined(__x86_64__) || !defined(PSTM_64BIT)
#error "PSTM_X86_64 option requires PSTM_64BIT, GCC and 64 bit mode x86 processor"
#endif
//#pragma message ("Using 64 bit x86_64 Assembly Optimizations")
#define COMBA_START
#define CLEAR_CARRY \
c0 = c1 = c2 = 0;
#define COMBA_STORE(x) \
x = c0;
#define COMBA_STORE2(x) \
x = c1;
#define CARRY_FORWARD \
do { c0 = c1; c1 = c2; c2 = 0; } while (0);
#define COMBA_FINI
#define SQRADD(i, j) \
asm( \
"movq %6,%%rax \n\t" \
"mulq %%rax \n\t" \
"addq %%rax,%0 \n\t" \
"adcq %%rdx,%1 \n\t" \
"adcq $0,%2 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i) :"%rax","%rdx","cc");
#define SQRADD2(i, j) \
asm( \
"movq %6,%%rax \n\t" \
"mulq %7 \n\t" \
"addq %%rax,%0 \n\t" \
"adcq %%rdx,%1 \n\t" \
"adcq $0,%2 \n\t" \
"addq %%rax,%0 \n\t" \
"adcq %%rdx,%1 \n\t" \
"adcq $0,%2 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2): "0"(c0), "1"(c1), "2"(c2), "g"(i), "g"(j) :"%rax","%rdx","cc");
#define SQRADDSC(i, j) \
asm( \
"movq %6,%%rax \n\t" \
"mulq %7 \n\t" \
"movq %%rax,%0 \n\t" \
"movq %%rdx,%1 \n\t" \
"xorq %2,%2 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%rax","%rdx","cc");
#define SQRADDAC(i, j) \
asm( \
"movq %6,%%rax \n\t" \
"mulq %7 \n\t" \
"addq %%rax,%0 \n\t" \
"adcq %%rdx,%1 \n\t" \
"adcq $0,%2 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2): "0"(sc0), "1"(sc1), "2"(sc2), "g"(i), "g"(j) :"%rax","%rdx","cc");
#define SQRADDDB \
asm( \
"addq %6,%0 \n\t" \
"adcq %7,%1 \n\t" \
"adcq %8,%2 \n\t" \
"addq %6,%0 \n\t" \
"adcq %7,%1 \n\t" \
"adcq %8,%2 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2) : "0"(c0), "1"(c1), "2"(c2), "r"(sc0), "r"(sc1), "r"(sc2) : "cc");
/******************************************************************************/
#elif defined(PSTM_ARM)
/* ARM code */
//#pragma message ("Using 32 bit ARM Assembly Optimizations")
#define COMBA_START
#define CLEAR_CARRY \
c0 = c1 = c2 = 0;
#define COMBA_STORE(x) \
x = c0;
#define COMBA_STORE2(x) \
x = c1;
#define CARRY_FORWARD \
do { c0 = c1; c1 = c2; c2 = 0; } while (0);
#define COMBA_FINI
/* multiplies point i and j, updates carry "c1" and digit c2 */
#define SQRADD(i, j) \
asm( \
" UMULL r0,r1,%6,%6 \n\t" \
" ADDS %0,%0,r0 \n\t" \
" ADCS %1,%1,r1 \n\t" \
" ADC %2,%2,#0 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2) : "0"(c0), "1"(c1), "2"(c2), "r"(i) : "r0", "r1", "%cc");
/* for squaring some of the terms are doubled... */
#define SQRADD2(i, j) \
asm( \
" UMULL r0,r1,%6,%7 \n\t" \
" ADDS %0,%0,r0 \n\t" \
" ADCS %1,%1,r1 \n\t" \
" ADC %2,%2,#0 \n\t" \
" ADDS %0,%0,r0 \n\t" \
" ADCS %1,%1,r1 \n\t" \
" ADC %2,%2,#0 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2) : "0"(c0), "1"(c1), "2"(c2), "r"(i), "r"(j) : "r0", "r1", "%cc");
#define SQRADDSC(i, j) \
asm( \
" UMULL %0,%1,%6,%7 \n\t" \
" SUB %2,%2,%2 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2) : "0"(sc0), "1"(sc1), "2"(sc2), "r"(i), "r"(j) : "%cc");
#define SQRADDAC(i, j) \
asm( \
" UMULL r0,r1,%6,%7 \n\t" \
" ADDS %0,%0,r0 \n\t" \
" ADCS %1,%1,r1 \n\t" \
" ADC %2,%2,#0 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2) : "0"(sc0), "1"(sc1), "2"(sc2), "r"(i), "r"(j) : "r0", "r1", "%cc");
#define SQRADDDB \
asm( \
" ADDS %0,%0,%3 \n\t" \
" ADCS %1,%1,%4 \n\t" \
" ADC %2,%2,%5 \n\t" \
" ADDS %0,%0,%3 \n\t" \
" ADCS %1,%1,%4 \n\t" \
" ADC %2,%2,%5 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2) : "r"(sc0), "r"(sc1), "r"(sc2), "0"(c0), "1"(c1), "2"(c2) : "%cc");
/******************************************************************************/
#elif defined(PSTM_MIPS)
/* MIPS32 */
//#pragma message ("Using 32 bit MIPS Assembly Optimizations")
#define COMBA_START
#define CLEAR_CARRY \
c0 = c1 = c2 = 0;
#define COMBA_STORE(x) \
x = c0;
#define COMBA_STORE2(x) \
x = c1;
#define CARRY_FORWARD \
do { c0 = c1; c1 = c2; c2 = 0; } while (0);
#define COMBA_FINI
/* multiplies point i and j, updates carry "c1" and digit c2 */
#define SQRADD(i, j) \
asm( \
" multu %6,%6 \n\t" \
" mflo $12 \n\t" \
" mfhi $13 \n\t" \
" addu %0,%0,$12 \n\t" \
" sltu $12,%0,$12 \n\t" \
" addu %1,%1,$13 \n\t" \
" sltu $13,%1,$13 \n\t" \
" addu %1,%1,$12 \n\t" \
" sltu $12,%1,$12 \n\t" \
" addu %2,%2,$13 \n\t" \
" addu %2,%2,$12 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2):"0"(c0), "1"(c1), "2"(c2), "r"(i):"$12","$13");
/* for squaring some of the terms are doubled... */
#define SQRADD2(i, j) \
asm( \
" multu %6,%7 \n\t" \
" mflo $12 \n\t" \
" mfhi $13 \n\t" \
\
" addu %0,%0,$12 \n\t" \
" sltu $14,%0,$12 \n\t" \
" addu %1,%1,$13 \n\t" \
" sltu $15,%1,$13 \n\t" \
" addu %1,%1,$14 \n\t" \
" sltu $14,%1,$14 \n\t" \
" addu %2,%2,$15 \n\t" \
" addu %2,%2,$14 \n\t" \
\
" addu %0,%0,$12 \n\t" \
" sltu $14,%0,$12 \n\t" \
" addu %1,%1,$13 \n\t" \
" sltu $15,%1,$13 \n\t" \
" addu %1,%1,$14 \n\t" \
" sltu $14,%1,$14 \n\t" \
" addu %2,%2,$15 \n\t" \
" addu %2,%2,$14 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2):"0"(c0), "1"(c1), "2"(c2), "r"(i), "r"(j):"$12", "$13", "$14", "$15");
#define SQRADDSC(i, j) \
asm( \
" multu %6,%7 \n\t" \
" mflo %0 \n\t" \
" mfhi %1 \n\t" \
" xor %2,%2,%2 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2):"0"(sc0), "1"(sc1), "2"(sc2), "r"(i),"r"(j) : "%cc");
#define SQRADDAC(i, j) \
asm( \
" multu %6,%7 \n\t" \
" mflo $12 \n\t" \
" mfhi $13 \n\t" \
" addu %0,%0,$12 \n\t" \
" sltu $12,%0,$12 \n\t" \
" addu %1,%1,$13 \n\t" \
" sltu $13,%1,$13 \n\t" \
" addu %1,%1,$12 \n\t" \
" sltu $12,%1,$12 \n\t" \
" addu %2,%2,$13 \n\t" \
" addu %2,%2,$12 \n\t" \
:"=r"(sc0), "=r"(sc1), "=r"(sc2):"0"(sc0), "1"(sc1), "2"(sc2), "r"(i), "r"(j):"$12", "$13", "$14");
#define SQRADDDB \
asm( \
" addu %0,%0,%3 \n\t" \
" sltu $10,%0,%3 \n\t" \
" addu %1,%1,$10 \n\t" \
" sltu $10,%1,$10 \n\t" \
" addu %1,%1,%4 \n\t" \
" sltu $11,%1,%4 \n\t" \
" addu %2,%2,$10 \n\t" \
" addu %2,%2,$11 \n\t" \
" addu %2,%2,%5 \n\t" \
\
" addu %0,%0,%3 \n\t" \
" sltu $10,%0,%3 \n\t" \
" addu %1,%1,$10 \n\t" \
" sltu $10,%1,$10 \n\t" \
" addu %1,%1,%4 \n\t" \
" sltu $11,%1,%4 \n\t" \
" addu %2,%2,$10 \n\t" \
" addu %2,%2,$11 \n\t" \
" addu %2,%2,%5 \n\t" \
:"=r"(c0), "=r"(c1), "=r"(c2) : "r"(sc0), "r"(sc1), "r"(sc2), "0"(c0), "1"(c1), "2"(c2) : "$10", "$11");
#else
/******************************************************************************/
#define PSTM_ISO
/* ISO C portable code */
#define COMBA_START
#define CLEAR_CARRY \
c0 = c1 = c2 = 0;
#define COMBA_STORE(x) \
x = c0;
#define COMBA_STORE2(x) \
x = c1;
#define CARRY_FORWARD \
do { c0 = c1; c1 = c2; c2 = 0; } while (0);
#define COMBA_FINI
/* multiplies point i and j, updates carry "c1" and digit c2 */
#define SQRADD(i, j) \
do { pstm_word t; \
t = c0 + ((pstm_word)i) * ((pstm_word)j); c0 = (pstm_digit)t; \
t = c1 + (t >> DIGIT_BIT); \
c1 = (pstm_digit)t; c2 += (pstm_digit)(t >> DIGIT_BIT); \
} while (0);
/* for squaring some of the terms are doubled... */
#define SQRADD2(i, j) \
do { pstm_word t; \
t = ((pstm_word)i) * ((pstm_word)j); \
tt = (pstm_word)c0 + t; c0 = (pstm_digit)tt; \
tt = (pstm_word)c1 + (tt >> DIGIT_BIT); \
c1 = (pstm_digit)tt; c2 += (pstm_digit)(tt >> DIGIT_BIT); \
tt = (pstm_word)c0 + t; c0 = (pstm_digit)tt; \
tt = (pstm_word)c1 + (tt >> DIGIT_BIT); \
c1 = (pstm_digit)tt; c2 += (pstm_digit)(tt >> DIGIT_BIT); \
} while (0);
#define SQRADDSC(i, j) \
do { pstm_word t; \
t = ((pstm_word)i) * ((pstm_word)j); \
sc0 = (pstm_digit)t; sc1 = (pstm_digit)(t >> DIGIT_BIT); sc2 = 0; \
} while (0);
#define SQRADDAC(i, j) \
do { pstm_word t; \
t = ((pstm_word)sc0) + ((pstm_word)i) * ((pstm_word)j); \
sc0 = (pstm_digit)t; \
t = ((pstm_word)sc1) + (t >> DIGIT_BIT); sc1 = (pstm_digit)t; \
sc2 += (pstm_digit)(t >> DIGIT_BIT); \
} while (0);
#define SQRADDDB \
do { pstm_word t; \
t = ((pstm_word)sc0) + ((pstm_word)sc0) + ((pstm_word)c0); \
c0 = (pstm_digit)t; \
t = ((pstm_word)sc1) + ((pstm_word)sc1) + c1 + (t >> DIGIT_BIT); \
c1 = (pstm_digit)t; \
c2 = c2 + sc2 + sc2 + (pstm_digit)(t >> DIGIT_BIT); \
} while (0);
#endif /* ISO_C */
/******************************************************************************/
/*
Non-unrolled comba squarer
*/
//bbox: pool unused
#define pstm_sqr_comba_gen(pool, A, B, paD, paDlen) \
pstm_sqr_comba_gen( A, B, paD, paDlen)
static int32 pstm_sqr_comba_gen(psPool_t *pool, pstm_int *A, pstm_int *B,
pstm_digit *paD, uint32 paDlen)
{
int paDfail, pa; //bbox: was int16
int32 ix, iz;
pstm_digit c0, c1, c2, *dst;
#ifdef PSTM_ISO
pstm_word tt;
#endif
paDfail = 0;
/* get size of output and trim */
pa = A->used + A->used;
/* number of output digits to produce */
COMBA_START;
CLEAR_CARRY;
/*
If b is not large enough grow it and continue
*/
if (B->alloc < pa) {
if (pstm_grow(B, pa) != PSTM_OKAY) {
return PS_MEM_FAIL;
}
}
if (paD != NULL) {
if (paDlen < (sizeof(pstm_digit) * pa)) {
paDfail = 1; /* have a paD, but it's not big enough */
dst = xzalloc(sizeof(pstm_digit) * pa);//bbox
} else {
dst = paD;
memset(dst, 0x0, paDlen);
}
} else {
dst = xzalloc(sizeof(pstm_digit) * pa);//bbox
}
for (ix = 0; ix < pa; ix++) {
int32 tx, ty, iy;
pstm_digit *tmpy, *tmpx;
/* get offsets into the two bignums */
ty = min(A->used-1, ix);
tx = ix - ty;
/* setup temp aliases */
tmpx = A->dp + tx;
tmpy = A->dp + ty;
/*
This is the number of times the loop will iterate,
while (tx++ < a->used && ty-- >= 0) { ... }
*/
iy = min(A->used-tx, ty+1);
/*
now for squaring tx can never equal ty. We halve the distance since
they approach at a rate of 2x and we have to round because odd cases
need to be executed
*/
iy = min(iy, (ty-tx+1)>>1);
/* forward carries */
CARRY_FORWARD;
/* execute loop */
for (iz = 0; iz < iy; iz++) {
SQRADD2(*tmpx++, *tmpy--);
}
/* even columns have the square term in them */
if ((ix&1) == 0) {
SQRADD(A->dp[ix>>1], A->dp[ix>>1]);
}
/* store it */
COMBA_STORE(dst[ix]);
}
COMBA_FINI;
/*
setup dest
*/
iz = B->used;
B->used = pa;
{
pstm_digit *tmpc;
tmpc = B->dp;
for (ix = 0; ix < pa; ix++) {
*tmpc++ = dst[ix];
}
/* clear unused digits (that existed in the old copy of c) */
for (; ix < iz; ix++) {
*tmpc++ = 0;
}
}
pstm_clamp(B);
if ((paD == NULL) || paDfail == 1) {
psFree(dst, pool);
}
return PS_SUCCESS;
}
/******************************************************************************/
/*
Unrolled Comba loop for 1024 bit keys
*/
#ifdef USE_1024_KEY_SPEED_OPTIMIZATIONS
static int32 pstm_sqr_comba16(pstm_int *A, pstm_int *B)
{
pstm_digit *a, b[32], c0, c1, c2, sc0, sc1, sc2;
#ifdef PSTM_ISO
pstm_word tt;
#endif
if (B->alloc < 32) {
if (pstm_grow(B, 32) != PSTM_OKAY) {
return PS_MEM_FAIL;
}
}
a = A->dp;
sc0 = sc1 = sc2 = 0;
COMBA_START;
/* clear carries */
CLEAR_CARRY;
/* output 0 */
SQRADD(a[0],a[0]);
COMBA_STORE(b[0]);
/* output 1 */
CARRY_FORWARD;
SQRADD2(a[0], a[1]);
COMBA_STORE(b[1]);
/* output 2 */
CARRY_FORWARD;
SQRADD2(a[0], a[2]); SQRADD(a[1], a[1]);
COMBA_STORE(b[2]);
/* output 3 */
CARRY_FORWARD;
SQRADD2(a[0], a[3]); SQRADD2(a[1], a[2]);
COMBA_STORE(b[3]);
/* output 4 */
CARRY_FORWARD;
SQRADD2(a[0], a[4]); SQRADD2(a[1], a[3]); SQRADD(a[2], a[2]);
COMBA_STORE(b[4]);
/* output 5 */
CARRY_FORWARD;
SQRADDSC(a[0], a[5]); SQRADDAC(a[1], a[4]); SQRADDAC(a[2], a[3]); SQRADDDB;
COMBA_STORE(b[5]);
/* output 6 */
CARRY_FORWARD;
SQRADDSC(a[0], a[6]); SQRADDAC(a[1], a[5]); SQRADDAC(a[2], a[4]); SQRADDDB; SQRADD(a[3], a[3]);
COMBA_STORE(b[6]);
/* output 7 */
CARRY_FORWARD;
SQRADDSC(a[0], a[7]); SQRADDAC(a[1], a[6]); SQRADDAC(a[2], a[5]); SQRADDAC(a[3], a[4]); SQRADDDB;
COMBA_STORE(b[7]);
/* output 8 */
CARRY_FORWARD;
SQRADDSC(a[0], a[8]); SQRADDAC(a[1], a[7]); SQRADDAC(a[2], a[6]); SQRADDAC(a[3], a[5]); SQRADDDB; SQRADD(a[4], a[4]);
COMBA_STORE(b[8]);
/* output 9 */
CARRY_FORWARD;
SQRADDSC(a[0], a[9]); SQRADDAC(a[1], a[8]); SQRADDAC(a[2], a[7]); SQRADDAC(a[3], a[6]); SQRADDAC(a[4], a[5]); SQRADDDB;
COMBA_STORE(b[9]);
/* output 10 */
CARRY_FORWARD;
SQRADDSC(a[0], a[10]); SQRADDAC(a[1], a[9]); SQRADDAC(a[2], a[8]); SQRADDAC(a[3], a[7]); SQRADDAC(a[4], a[6]); SQRADDDB; SQRADD(a[5], a[5]);
COMBA_STORE(b[10]);
/* output 11 */
CARRY_FORWARD;
SQRADDSC(a[0], a[11]); SQRADDAC(a[1], a[10]); SQRADDAC(a[2], a[9]); SQRADDAC(a[3], a[8]); SQRADDAC(a[4], a[7]); SQRADDAC(a[5], a[6]); SQRADDDB;
COMBA_STORE(b[11]);
/* output 12 */
CARRY_FORWARD;
SQRADDSC(a[0], a[12]); SQRADDAC(a[1], a[11]); SQRADDAC(a[2], a[10]); SQRADDAC(a[3], a[9]); SQRADDAC(a[4], a[8]); SQRADDAC(a[5], a[7]); SQRADDDB; SQRADD(a[6], a[6]);
COMBA_STORE(b[12]);
/* output 13 */
CARRY_FORWARD;
SQRADDSC(a[0], a[13]); SQRADDAC(a[1], a[12]); SQRADDAC(a[2], a[11]); SQRADDAC(a[3], a[10]); SQRADDAC(a[4], a[9]); SQRADDAC(a[5], a[8]); SQRADDAC(a[6], a[7]); SQRADDDB;
COMBA_STORE(b[13]);
/* output 14 */
CARRY_FORWARD;
SQRADDSC(a[0], a[14]); SQRADDAC(a[1], a[13]); SQRADDAC(a[2], a[12]); SQRADDAC(a[3], a[11]); SQRADDAC(a[4], a[10]); SQRADDAC(a[5], a[9]); SQRADDAC(a[6], a[8]); SQRADDDB; SQRADD(a[7], a[7]);
COMBA_STORE(b[14]);
/* output 15 */
CARRY_FORWARD;
SQRADDSC(a[0], a[15]); SQRADDAC(a[1], a[14]); SQRADDAC(a[2], a[13]); SQRADDAC(a[3], a[12]); SQRADDAC(a[4], a[11]); SQRADDAC(a[5], a[10]); SQRADDAC(a[6], a[9]); SQRADDAC(a[7], a[8]); SQRADDDB;
COMBA_STORE(b[15]);
/* output 16 */
CARRY_FORWARD;
SQRADDSC(a[1], a[15]); SQRADDAC(a[2], a[14]); SQRADDAC(a[3], a[13]); SQRADDAC(a[4], a[12]); SQRADDAC(a[5], a[11]); SQRADDAC(a[6], a[10]); SQRADDAC(a[7], a[9]); SQRADDDB; SQRADD(a[8], a[8]);
COMBA_STORE(b[16]);
/* output 17 */
CARRY_FORWARD;
SQRADDSC(a[2], a[15]); SQRADDAC(a[3], a[14]); SQRADDAC(a[4], a[13]); SQRADDAC(a[5], a[12]); SQRADDAC(a[6], a[11]); SQRADDAC(a[7], a[10]); SQRADDAC(a[8], a[9]); SQRADDDB;
COMBA_STORE(b[17]);
/* output 18 */
CARRY_FORWARD;
SQRADDSC(a[3], a[15]); SQRADDAC(a[4], a[14]); SQRADDAC(a[5], a[13]); SQRADDAC(a[6], a[12]); SQRADDAC(a[7], a[11]); SQRADDAC(a[8], a[10]); SQRADDDB; SQRADD(a[9], a[9]);
COMBA_STORE(b[18]);
/* output 19 */
CARRY_FORWARD;
SQRADDSC(a[4], a[15]); SQRADDAC(a[5], a[14]); SQRADDAC(a[6], a[13]); SQRADDAC(a[7], a[12]); SQRADDAC(a[8], a[11]); SQRADDAC(a[9], a[10]); SQRADDDB;
COMBA_STORE(b[19]);
/* output 20 */
CARRY_FORWARD;
SQRADDSC(a[5], a[15]); SQRADDAC(a[6], a[14]); SQRADDAC(a[7], a[13]); SQRADDAC(a[8], a[12]); SQRADDAC(a[9], a[11]); SQRADDDB; SQRADD(a[10], a[10]);
COMBA_STORE(b[20]);
/* output 21 */
CARRY_FORWARD;
SQRADDSC(a[6], a[15]); SQRADDAC(a[7], a[14]); SQRADDAC(a[8], a[13]); SQRADDAC(a[9], a[12]); SQRADDAC(a[10], a[11]); SQRADDDB;
COMBA_STORE(b[21]);
/* output 22 */
CARRY_FORWARD;
SQRADDSC(a[7], a[15]); SQRADDAC(a[8], a[14]); SQRADDAC(a[9], a[13]); SQRADDAC(a[10], a[12]); SQRADDDB; SQRADD(a[11], a[11]);
COMBA_STORE(b[22]);
/* output 23 */
CARRY_FORWARD;
SQRADDSC(a[8], a[15]); SQRADDAC(a[9], a[14]); SQRADDAC(a[10], a[13]); SQRADDAC(a[11], a[12]); SQRADDDB;
COMBA_STORE(b[23]);
/* output 24 */
CARRY_FORWARD;
SQRADDSC(a[9], a[15]); SQRADDAC(a[10], a[14]); SQRADDAC(a[11], a[13]); SQRADDDB; SQRADD(a[12], a[12]);
COMBA_STORE(b[24]);
/* output 25 */
CARRY_FORWARD;
SQRADDSC(a[10], a[15]); SQRADDAC(a[11], a[14]); SQRADDAC(a[12], a[13]); SQRADDDB;
COMBA_STORE(b[25]);
/* output 26 */
CARRY_FORWARD;
SQRADD2(a[11], a[15]); SQRADD2(a[12], a[14]); SQRADD(a[13], a[13]);
COMBA_STORE(b[26]);
/* output 27 */
CARRY_FORWARD;
SQRADD2(a[12], a[15]); SQRADD2(a[13], a[14]);
COMBA_STORE(b[27]);
/* output 28 */
CARRY_FORWARD;
SQRADD2(a[13], a[15]); SQRADD(a[14], a[14]);
COMBA_STORE(b[28]);
/* output 29 */
CARRY_FORWARD;
SQRADD2(a[14], a[15]);
COMBA_STORE(b[29]);
/* output 30 */
CARRY_FORWARD;
SQRADD(a[15], a[15]);
COMBA_STORE(b[30]);
COMBA_STORE2(b[31]);
COMBA_FINI;
B->used = 32;
B->sign = PSTM_ZPOS;
memcpy(B->dp, b, 32 * sizeof(pstm_digit));
pstm_clamp(B);
return PSTM_OKAY;
}
#endif /* USE_1024_KEY_SPEED_OPTIMIZATIONS */
#ifdef USE_2048_KEY_SPEED_OPTIMIZATIONS
static int32 pstm_sqr_comba32(pstm_int *A, pstm_int *B)
{
pstm_digit *a, b[64], c0, c1, c2, sc0, sc1, sc2;
#ifdef PSTM_ISO
pstm_word tt;
#endif
if (B->alloc < 64) {
if (pstm_grow(B, 64) != PSTM_OKAY) {
return PS_MEM_FAIL;
}
}
sc0 = sc1 = sc2 = 0;
a = A->dp;
COMBA_START;
/* clear carries */
CLEAR_CARRY;
/* output 0 */
SQRADD(a[0],a[0]);
COMBA_STORE(b[0]);
/* output 1 */
CARRY_FORWARD;
SQRADD2(a[0], a[1]);
COMBA_STORE(b[1]);
/* output 2 */
CARRY_FORWARD;
SQRADD2(a[0], a[2]); SQRADD(a[1], a[1]);
COMBA_STORE(b[2]);
/* output 3 */
CARRY_FORWARD;
SQRADD2(a[0], a[3]); SQRADD2(a[1], a[2]);
COMBA_STORE(b[3]);
/* output 4 */
CARRY_FORWARD;
SQRADD2(a[0], a[4]); SQRADD2(a[1], a[3]); SQRADD(a[2], a[2]);
COMBA_STORE(b[4]);
/* output 5 */
CARRY_FORWARD;
SQRADDSC(a[0], a[5]); SQRADDAC(a[1], a[4]); SQRADDAC(a[2], a[3]); SQRADDDB;
COMBA_STORE(b[5]);
/* output 6 */
CARRY_FORWARD;
SQRADDSC(a[0], a[6]); SQRADDAC(a[1], a[5]); SQRADDAC(a[2], a[4]); SQRADDDB; SQRADD(a[3], a[3]);
COMBA_STORE(b[6]);
/* output 7 */
CARRY_FORWARD;
SQRADDSC(a[0], a[7]); SQRADDAC(a[1], a[6]); SQRADDAC(a[2], a[5]); SQRADDAC(a[3], a[4]); SQRADDDB;
COMBA_STORE(b[7]);
/* output 8 */
CARRY_FORWARD;
SQRADDSC(a[0], a[8]); SQRADDAC(a[1], a[7]); SQRADDAC(a[2], a[6]); SQRADDAC(a[3], a[5]); SQRADDDB; SQRADD(a[4], a[4]);
COMBA_STORE(b[8]);
/* output 9 */
CARRY_FORWARD;
SQRADDSC(a[0], a[9]); SQRADDAC(a[1], a[8]); SQRADDAC(a[2], a[7]); SQRADDAC(a[3], a[6]); SQRADDAC(a[4], a[5]); SQRADDDB;
COMBA_STORE(b[9]);
/* output 10 */
CARRY_FORWARD;
SQRADDSC(a[0], a[10]); SQRADDAC(a[1], a[9]); SQRADDAC(a[2], a[8]); SQRADDAC(a[3], a[7]); SQRADDAC(a[4], a[6]); SQRADDDB; SQRADD(a[5], a[5]);
COMBA_STORE(b[10]);
/* output 11 */
CARRY_FORWARD;
SQRADDSC(a[0], a[11]); SQRADDAC(a[1], a[10]); SQRADDAC(a[2], a[9]); SQRADDAC(a[3], a[8]); SQRADDAC(a[4], a[7]); SQRADDAC(a[5], a[6]); SQRADDDB;
COMBA_STORE(b[11]);
/* output 12 */
CARRY_FORWARD;
SQRADDSC(a[0], a[12]); SQRADDAC(a[1], a[11]); SQRADDAC(a[2], a[10]); SQRADDAC(a[3], a[9]); SQRADDAC(a[4], a[8]); SQRADDAC(a[5], a[7]); SQRADDDB; SQRADD(a[6], a[6]);
COMBA_STORE(b[12]);
/* output 13 */
CARRY_FORWARD;
SQRADDSC(a[0], a[13]); SQRADDAC(a[1], a[12]); SQRADDAC(a[2], a[11]); SQRADDAC(a[3], a[10]); SQRADDAC(a[4], a[9]); SQRADDAC(a[5], a[8]); SQRADDAC(a[6], a[7]); SQRADDDB;
COMBA_STORE(b[13]);
/* output 14 */
CARRY_FORWARD;
SQRADDSC(a[0], a[14]); SQRADDAC(a[1], a[13]); SQRADDAC(a[2], a[12]); SQRADDAC(a[3], a[11]); SQRADDAC(a[4], a[10]); SQRADDAC(a[5], a[9]); SQRADDAC(a[6], a[8]); SQRADDDB; SQRADD(a[7], a[7]);
COMBA_STORE(b[14]);
/* output 15 */
CARRY_FORWARD;
SQRADDSC(a[0], a[15]); SQRADDAC(a[1], a[14]); SQRADDAC(a[2], a[13]); SQRADDAC(a[3], a[12]); SQRADDAC(a[4], a[11]); SQRADDAC(a[5], a[10]); SQRADDAC(a[6], a[9]); SQRADDAC(a[7], a[8]); SQRADDDB;
COMBA_STORE(b[15]);
/* output 16 */
CARRY_FORWARD;
SQRADDSC(a[0], a[16]); SQRADDAC(a[1], a[15]); SQRADDAC(a[2], a[14]); SQRADDAC(a[3], a[13]); SQRADDAC(a[4], a[12]); SQRADDAC(a[5], a[11]); SQRADDAC(a[6], a[10]); SQRADDAC(a[7], a[9]); SQRADDDB; SQRADD(a[8], a[8]);
COMBA_STORE(b[16]);
/* output 17 */
CARRY_FORWARD;
SQRADDSC(a[0], a[17]); SQRADDAC(a[1], a[16]); SQRADDAC(a[2], a[15]); SQRADDAC(a[3], a[14]); SQRADDAC(a[4], a[13]); SQRADDAC(a[5], a[12]); SQRADDAC(a[6], a[11]); SQRADDAC(a[7], a[10]); SQRADDAC(a[8], a[9]); SQRADDDB;
COMBA_STORE(b[17]);
/* output 18 */
CARRY_FORWARD;
SQRADDSC(a[0], a[18]); SQRADDAC(a[1], a[17]); SQRADDAC(a[2], a[16]); SQRADDAC(a[3], a[15]); SQRADDAC(a[4], a[14]); SQRADDAC(a[5], a[13]); SQRADDAC(a[6], a[12]); SQRADDAC(a[7], a[11]); SQRADDAC(a[8], a[10]); SQRADDDB; SQRADD(a[9], a[9]);
COMBA_STORE(b[18]);
/* output 19 */
CARRY_FORWARD;
SQRADDSC(a[0], a[19]); SQRADDAC(a[1], a[18]); SQRADDAC(a[2], a[17]); SQRADDAC(a[3], a[16]); SQRADDAC(a[4], a[15]); SQRADDAC(a[5], a[14]); SQRADDAC(a[6], a[13]); SQRADDAC(a[7], a[12]); SQRADDAC(a[8], a[11]); SQRADDAC(a[9], a[10]); SQRADDDB;
COMBA_STORE(b[19]);
/* output 20 */
CARRY_FORWARD;
SQRADDSC(a[0], a[20]); SQRADDAC(a[1], a[19]); SQRADDAC(a[2], a[18]); SQRADDAC(a[3], a[17]); SQRADDAC(a[4], a[16]); SQRADDAC(a[5], a[15]); SQRADDAC(a[6], a[14]); SQRADDAC(a[7], a[13]); SQRADDAC(a[8], a[12]); SQRADDAC(a[9], a[11]); SQRADDDB; SQRADD(a[10], a[10]);
COMBA_STORE(b[20]);
/* output 21 */
CARRY_FORWARD;
SQRADDSC(a[0], a[21]); SQRADDAC(a[1], a[20]); SQRADDAC(a[2], a[19]); SQRADDAC(a[3], a[18]); SQRADDAC(a[4], a[17]); SQRADDAC(a[5], a[16]); SQRADDAC(a[6], a[15]); SQRADDAC(a[7], a[14]); SQRADDAC(a[8], a[13]); SQRADDAC(a[9], a[12]); SQRADDAC(a[10], a[11]); SQRADDDB;
COMBA_STORE(b[21]);
/* output 22 */
CARRY_FORWARD;
SQRADDSC(a[0], a[22]); SQRADDAC(a[1], a[21]); SQRADDAC(a[2], a[20]); SQRADDAC(a[3], a[19]); SQRADDAC(a[4], a[18]); SQRADDAC(a[5], a[17]); SQRADDAC(a[6], a[16]); SQRADDAC(a[7], a[15]); SQRADDAC(a[8], a[14]); SQRADDAC(a[9], a[13]); SQRADDAC(a[10], a[12]); SQRADDDB; SQRADD(a[11], a[11]);
COMBA_STORE(b[22]);
/* output 23 */
CARRY_FORWARD;
SQRADDSC(a[0], a[23]); SQRADDAC(a[1], a[22]); SQRADDAC(a[2], a[21]); SQRADDAC(a[3], a[20]); SQRADDAC(a[4], a[19]); SQRADDAC(a[5], a[18]); SQRADDAC(a[6], a[17]); SQRADDAC(a[7], a[16]); SQRADDAC(a[8], a[15]); SQRADDAC(a[9], a[14]); SQRADDAC(a[10], a[13]); SQRADDAC(a[11], a[12]); SQRADDDB;
COMBA_STORE(b[23]);
/* output 24 */
CARRY_FORWARD;
SQRADDSC(a[0], a[24]); SQRADDAC(a[1], a[23]); SQRADDAC(a[2], a[22]); SQRADDAC(a[3], a[21]); SQRADDAC(a[4], a[20]); SQRADDAC(a[5], a[19]); SQRADDAC(a[6], a[18]); SQRADDAC(a[7], a[17]); SQRADDAC(a[8], a[16]); SQRADDAC(a[9], a[15]); SQRADDAC(a[10], a[14]); SQRADDAC(a[11], a[13]); SQRADDDB; SQRADD(a[12], a[12]);
COMBA_STORE(b[24]);
/* output 25 */
CARRY_FORWARD;
SQRADDSC(a[0], a[25]); SQRADDAC(a[1], a[24]); SQRADDAC(a[2], a[23]); SQRADDAC(a[3], a[22]); SQRADDAC(a[4], a[21]); SQRADDAC(a[5], a[20]); SQRADDAC(a[6], a[19]); SQRADDAC(a[7], a[18]); SQRADDAC(a[8], a[17]); SQRADDAC(a[9], a[16]); SQRADDAC(a[10], a[15]); SQRADDAC(a[11], a[14]); SQRADDAC(a[12], a[13]); SQRADDDB;
COMBA_STORE(b[25]);
/* output 26 */
CARRY_FORWARD;
SQRADDSC(a[0], a[26]); SQRADDAC(a[1], a[25]); SQRADDAC(a[2], a[24]); SQRADDAC(a[3], a[23]); SQRADDAC(a[4], a[22]); SQRADDAC(a[5], a[21]); SQRADDAC(a[6], a[20]); SQRADDAC(a[7], a[19]); SQRADDAC(a[8], a[18]); SQRADDAC(a[9], a[17]); SQRADDAC(a[10], a[16]); SQRADDAC(a[11], a[15]); SQRADDAC(a[12], a[14]); SQRADDDB; SQRADD(a[13], a[13]);
COMBA_STORE(b[26]);
/* output 27 */
CARRY_FORWARD;
SQRADDSC(a[0], a[27]); SQRADDAC(a[1], a[26]); SQRADDAC(a[2], a[25]); SQRADDAC(a[3], a[24]); SQRADDAC(a[4], a[23]); SQRADDAC(a[5], a[22]); SQRADDAC(a[6], a[21]); SQRADDAC(a[7], a[20]); SQRADDAC(a[8], a[19]); SQRADDAC(a[9], a[18]); SQRADDAC(a[10], a[17]); SQRADDAC(a[11], a[16]); SQRADDAC(a[12], a[15]); SQRADDAC(a[13], a[14]); SQRADDDB;
COMBA_STORE(b[27]);
/* output 28 */
CARRY_FORWARD;
SQRADDSC(a[0], a[28]); SQRADDAC(a[1], a[27]); SQRADDAC(a[2], a[26]); SQRADDAC(a[3], a[25]); SQRADDAC(a[4], a[24]); SQRADDAC(a[5], a[23]); SQRADDAC(a[6], a[22]); SQRADDAC(a[7], a[21]); SQRADDAC(a[8], a[20]); SQRADDAC(a[9], a[19]); SQRADDAC(a[10], a[18]); SQRADDAC(a[11], a[17]); SQRADDAC(a[12], a[16]); SQRADDAC(a[13], a[15]); SQRADDDB; SQRADD(a[14], a[14]);
COMBA_STORE(b[28]);
/* output 29 */
CARRY_FORWARD;
SQRADDSC(a[0], a[29]); SQRADDAC(a[1], a[28]); SQRADDAC(a[2], a[27]); SQRADDAC(a[3], a[26]); SQRADDAC(a[4], a[25]); SQRADDAC(a[5], a[24]); SQRADDAC(a[6], a[23]); SQRADDAC(a[7], a[22]); SQRADDAC(a[8], a[21]); SQRADDAC(a[9], a[20]); SQRADDAC(a[10], a[19]); SQRADDAC(a[11], a[18]); SQRADDAC(a[12], a[17]); SQRADDAC(a[13], a[16]); SQRADDAC(a[14], a[15]); SQRADDDB;
COMBA_STORE(b[29]);
/* output 30 */
CARRY_FORWARD;
SQRADDSC(a[0], a[30]); SQRADDAC(a[1], a[29]); SQRADDAC(a[2], a[28]); SQRADDAC(a[3], a[27]); SQRADDAC(a[4], a[26]); SQRADDAC(a[5], a[25]); SQRADDAC(a[6], a[24]); SQRADDAC(a[7], a[23]); SQRADDAC(a[8], a[22]); SQRADDAC(a[9], a[21]); SQRADDAC(a[10], a[20]); SQRADDAC(a[11], a[19]); SQRADDAC(a[12], a[18]); SQRADDAC(a[13], a[17]); SQRADDAC(a[14], a[16]); SQRADDDB; SQRADD(a[15], a[15]);
COMBA_STORE(b[30]);
/* output 31 */
CARRY_FORWARD;
SQRADDSC(a[0], a[31]); SQRADDAC(a[1], a[30]); SQRADDAC(a[2], a[29]); SQRADDAC(a[3], a[28]); SQRADDAC(a[4], a[27]); SQRADDAC(a[5], a[26]); SQRADDAC(a[6], a[25]); SQRADDAC(a[7], a[24]); SQRADDAC(a[8], a[23]); SQRADDAC(a[9], a[22]); SQRADDAC(a[10], a[21]); SQRADDAC(a[11], a[20]); SQRADDAC(a[12], a[19]); SQRADDAC(a[13], a[18]); SQRADDAC(a[14], a[17]); SQRADDAC(a[15], a[16]); SQRADDDB;
COMBA_STORE(b[31]);
/* output 32 */
CARRY_FORWARD;
SQRADDSC(a[1], a[31]); SQRADDAC(a[2], a[30]); SQRADDAC(a[3], a[29]); SQRADDAC(a[4], a[28]); SQRADDAC(a[5], a[27]); SQRADDAC(a[6], a[26]); SQRADDAC(a[7], a[25]); SQRADDAC(a[8], a[24]); SQRADDAC(a[9], a[23]); SQRADDAC(a[10], a[22]); SQRADDAC(a[11], a[21]); SQRADDAC(a[12], a[20]); SQRADDAC(a[13], a[19]); SQRADDAC(a[14], a[18]); SQRADDAC(a[15], a[17]); SQRADDDB; SQRADD(a[16], a[16]);
COMBA_STORE(b[32]);
/* output 33 */
CARRY_FORWARD;
SQRADDSC(a[2], a[31]); SQRADDAC(a[3], a[30]); SQRADDAC(a[4], a[29]); SQRADDAC(a[5], a[28]); SQRADDAC(a[6], a[27]); SQRADDAC(a[7], a[26]); SQRADDAC(a[8], a[25]); SQRADDAC(a[9], a[24]); SQRADDAC(a[10], a[23]); SQRADDAC(a[11], a[22]); SQRADDAC(a[12], a[21]); SQRADDAC(a[13], a[20]); SQRADDAC(a[14], a[19]); SQRADDAC(a[15], a[18]); SQRADDAC(a[16], a[17]); SQRADDDB;
COMBA_STORE(b[33]);
/* output 34 */
CARRY_FORWARD;
SQRADDSC(a[3], a[31]); SQRADDAC(a[4], a[30]); SQRADDAC(a[5], a[29]); SQRADDAC(a[6], a[28]); SQRADDAC(a[7], a[27]); SQRADDAC(a[8], a[26]); SQRADDAC(a[9], a[25]); SQRADDAC(a[10], a[24]); SQRADDAC(a[11], a[23]); SQRADDAC(a[12], a[22]); SQRADDAC(a[13], a[21]); SQRADDAC(a[14], a[20]); SQRADDAC(a[15], a[19]); SQRADDAC(a[16], a[18]); SQRADDDB; SQRADD(a[17], a[17]);
COMBA_STORE(b[34]);
/* output 35 */
CARRY_FORWARD;
SQRADDSC(a[4], a[31]); SQRADDAC(a[5], a[30]); SQRADDAC(a[6], a[29]); SQRADDAC(a[7], a[28]); SQRADDAC(a[8], a[27]); SQRADDAC(a[9], a[26]); SQRADDAC(a[10], a[25]); SQRADDAC(a[11], a[24]); SQRADDAC(a[12], a[23]); SQRADDAC(a[13], a[22]); SQRADDAC(a[14], a[21]); SQRADDAC(a[15], a[20]); SQRADDAC(a[16], a[19]); SQRADDAC(a[17], a[18]); SQRADDDB;
COMBA_STORE(b[35]);
/* output 36 */
CARRY_FORWARD;
SQRADDSC(a[5], a[31]); SQRADDAC(a[6], a[30]); SQRADDAC(a[7], a[29]); SQRADDAC(a[8], a[28]); SQRADDAC(a[9], a[27]); SQRADDAC(a[10], a[26]); SQRADDAC(a[11], a[25]); SQRADDAC(a[12], a[24]); SQRADDAC(a[13], a[23]); SQRADDAC(a[14], a[22]); SQRADDAC(a[15], a[21]); SQRADDAC(a[16], a[20]); SQRADDAC(a[17], a[19]); SQRADDDB; SQRADD(a[18], a[18]);
COMBA_STORE(b[36]);
/* output 37 */
CARRY_FORWARD;
SQRADDSC(a[6], a[31]); SQRADDAC(a[7], a[30]); SQRADDAC(a[8], a[29]); SQRADDAC(a[9], a[28]); SQRADDAC(a[10], a[27]); SQRADDAC(a[11], a[26]); SQRADDAC(a[12], a[25]); SQRADDAC(a[13], a[24]); SQRADDAC(a[14], a[23]); SQRADDAC(a[15], a[22]); SQRADDAC(a[16], a[21]); SQRADDAC(a[17], a[20]); SQRADDAC(a[18], a[19]); SQRADDDB;
COMBA_STORE(b[37]);
/* output 38 */
CARRY_FORWARD;
SQRADDSC(a[7], a[31]); SQRADDAC(a[8], a[30]); SQRADDAC(a[9], a[29]); SQRADDAC(a[10], a[28]); SQRADDAC(a[11], a[27]); SQRADDAC(a[12], a[26]); SQRADDAC(a[13], a[25]); SQRADDAC(a[14], a[24]); SQRADDAC(a[15], a[23]); SQRADDAC(a[16], a[22]); SQRADDAC(a[17], a[21]); SQRADDAC(a[18], a[20]); SQRADDDB; SQRADD(a[19], a[19]);
COMBA_STORE(b[38]);
/* output 39 */
CARRY_FORWARD;
SQRADDSC(a[8], a[31]); SQRADDAC(a[9], a[30]); SQRADDAC(a[10], a[29]); SQRADDAC(a[11], a[28]); SQRADDAC(a[12], a[27]); SQRADDAC(a[13], a[26]); SQRADDAC(a[14], a[25]); SQRADDAC(a[15], a[24]); SQRADDAC(a[16], a[23]); SQRADDAC(a[17], a[22]); SQRADDAC(a[18], a[21]); SQRADDAC(a[19], a[20]); SQRADDDB;
COMBA_STORE(b[39]);
/* output 40 */
CARRY_FORWARD;
SQRADDSC(a[9], a[31]); SQRADDAC(a[10], a[30]); SQRADDAC(a[11], a[29]); SQRADDAC(a[12], a[28]); SQRADDAC(a[13], a[27]); SQRADDAC(a[14], a[26]); SQRADDAC(a[15], a[25]); SQRADDAC(a[16], a[24]); SQRADDAC(a[17], a[23]); SQRADDAC(a[18], a[22]); SQRADDAC(a[19], a[21]); SQRADDDB; SQRADD(a[20], a[20]);
COMBA_STORE(b[40]);
/* output 41 */
CARRY_FORWARD;
SQRADDSC(a[10], a[31]); SQRADDAC(a[11], a[30]); SQRADDAC(a[12], a[29]); SQRADDAC(a[13], a[28]); SQRADDAC(a[14], a[27]); SQRADDAC(a[15], a[26]); SQRADDAC(a[16], a[25]); SQRADDAC(a[17], a[24]); SQRADDAC(a[18], a[23]); SQRADDAC(a[19], a[22]); SQRADDAC(a[20], a[21]); SQRADDDB;
COMBA_STORE(b[41]);
/* output 42 */
CARRY_FORWARD;
SQRADDSC(a[11], a[31]); SQRADDAC(a[12], a[30]); SQRADDAC(a[13], a[29]); SQRADDAC(a[14], a[28]); SQRADDAC(a[15], a[27]); SQRADDAC(a[16], a[26]); SQRADDAC(a[17], a[25]); SQRADDAC(a[18], a[24]); SQRADDAC(a[19], a[23]); SQRADDAC(a[20], a[22]); SQRADDDB; SQRADD(a[21], a[21]);
COMBA_STORE(b[42]);
/* output 43 */
CARRY_FORWARD;
SQRADDSC(a[12], a[31]); SQRADDAC(a[13], a[30]); SQRADDAC(a[14], a[29]); SQRADDAC(a[15], a[28]); SQRADDAC(a[16], a[27]); SQRADDAC(a[17], a[26]); SQRADDAC(a[18], a[25]); SQRADDAC(a[19], a[24]); SQRADDAC(a[20], a[23]); SQRADDAC(a[21], a[22]); SQRADDDB;
COMBA_STORE(b[43]);
/* output 44 */
CARRY_FORWARD;
SQRADDSC(a[13], a[31]); SQRADDAC(a[14], a[30]); SQRADDAC(a[15], a[29]); SQRADDAC(a[16], a[28]); SQRADDAC(a[17], a[27]); SQRADDAC(a[18], a[26]); SQRADDAC(a[19], a[25]); SQRADDAC(a[20], a[24]); SQRADDAC(a[21], a[23]); SQRADDDB; SQRADD(a[22], a[22]);
COMBA_STORE(b[44]);
/* output 45 */
CARRY_FORWARD;
SQRADDSC(a[14], a[31]); SQRADDAC(a[15], a[30]); SQRADDAC(a[16], a[29]); SQRADDAC(a[17], a[28]); SQRADDAC(a[18], a[27]); SQRADDAC(a[19], a[26]); SQRADDAC(a[20], a[25]); SQRADDAC(a[21], a[24]); SQRADDAC(a[22], a[23]); SQRADDDB;
COMBA_STORE(b[45]);
/* output 46 */
CARRY_FORWARD;
SQRADDSC(a[15], a[31]); SQRADDAC(a[16], a[30]); SQRADDAC(a[17], a[29]); SQRADDAC(a[18], a[28]); SQRADDAC(a[19], a[27]); SQRADDAC(a[20], a[26]); SQRADDAC(a[21], a[25]); SQRADDAC(a[22], a[24]); SQRADDDB; SQRADD(a[23], a[23]);
COMBA_STORE(b[46]);
/* output 47 */
CARRY_FORWARD;
SQRADDSC(a[16], a[31]); SQRADDAC(a[17], a[30]); SQRADDAC(a[18], a[29]); SQRADDAC(a[19], a[28]); SQRADDAC(a[20], a[27]); SQRADDAC(a[21], a[26]); SQRADDAC(a[22], a[25]); SQRADDAC(a[23], a[24]); SQRADDDB;
COMBA_STORE(b[47]);
/* output 48 */
CARRY_FORWARD;
SQRADDSC(a[17], a[31]); SQRADDAC(a[18], a[30]); SQRADDAC(a[19], a[29]); SQRADDAC(a[20], a[28]); SQRADDAC(a[21], a[27]); SQRADDAC(a[22], a[26]); SQRADDAC(a[23], a[25]); SQRADDDB; SQRADD(a[24], a[24]);
COMBA_STORE(b[48]);
/* output 49 */
CARRY_FORWARD;
SQRADDSC(a[18], a[31]); SQRADDAC(a[19], a[30]); SQRADDAC(a[20], a[29]); SQRADDAC(a[21], a[28]); SQRADDAC(a[22], a[27]); SQRADDAC(a[23], a[26]); SQRADDAC(a[24], a[25]); SQRADDDB;
COMBA_STORE(b[49]);
/* output 50 */
CARRY_FORWARD;
SQRADDSC(a[19], a[31]); SQRADDAC(a[20], a[30]); SQRADDAC(a[21], a[29]); SQRADDAC(a[22], a[28]); SQRADDAC(a[23], a[27]); SQRADDAC(a[24], a[26]); SQRADDDB; SQRADD(a[25], a[25]);
COMBA_STORE(b[50]);
/* output 51 */
CARRY_FORWARD;
SQRADDSC(a[20], a[31]); SQRADDAC(a[21], a[30]); SQRADDAC(a[22], a[29]); SQRADDAC(a[23], a[28]); SQRADDAC(a[24], a[27]); SQRADDAC(a[25], a[26]); SQRADDDB;
COMBA_STORE(b[51]);
/* output 52 */
CARRY_FORWARD;
SQRADDSC(a[21], a[31]); SQRADDAC(a[22], a[30]); SQRADDAC(a[23], a[29]); SQRADDAC(a[24], a[28]); SQRADDAC(a[25], a[27]); SQRADDDB; SQRADD(a[26], a[26]);
COMBA_STORE(b[52]);
/* output 53 */
CARRY_FORWARD;
SQRADDSC(a[22], a[31]); SQRADDAC(a[23], a[30]); SQRADDAC(a[24], a[29]); SQRADDAC(a[25], a[28]); SQRADDAC(a[26], a[27]); SQRADDDB;
COMBA_STORE(b[53]);
/* output 54 */
CARRY_FORWARD;
SQRADDSC(a[23], a[31]); SQRADDAC(a[24], a[30]); SQRADDAC(a[25], a[29]); SQRADDAC(a[26], a[28]); SQRADDDB; SQRADD(a[27], a[27]);
COMBA_STORE(b[54]);
/* output 55 */
CARRY_FORWARD;
SQRADDSC(a[24], a[31]); SQRADDAC(a[25], a[30]); SQRADDAC(a[26], a[29]); SQRADDAC(a[27], a[28]); SQRADDDB;
COMBA_STORE(b[55]);
/* output 56 */
CARRY_FORWARD;
SQRADDSC(a[25], a[31]); SQRADDAC(a[26], a[30]); SQRADDAC(a[27], a[29]); SQRADDDB; SQRADD(a[28], a[28]);
COMBA_STORE(b[56]);
/* output 57 */
CARRY_FORWARD;
SQRADDSC(a[26], a[31]); SQRADDAC(a[27], a[30]); SQRADDAC(a[28], a[29]); SQRADDDB;
COMBA_STORE(b[57]);
/* output 58 */
CARRY_FORWARD;
SQRADD2(a[27], a[31]); SQRADD2(a[28], a[30]); SQRADD(a[29], a[29]);
COMBA_STORE(b[58]);
/* output 59 */
CARRY_FORWARD;
SQRADD2(a[28], a[31]); SQRADD2(a[29], a[30]);
COMBA_STORE(b[59]);
/* output 60 */
CARRY_FORWARD;
SQRADD2(a[29], a[31]); SQRADD(a[30], a[30]);
COMBA_STORE(b[60]);
/* output 61 */
CARRY_FORWARD;
SQRADD2(a[30], a[31]);
COMBA_STORE(b[61]);
/* output 62 */
CARRY_FORWARD;
SQRADD(a[31], a[31]);
COMBA_STORE(b[62]);
COMBA_STORE2(b[63]);
COMBA_FINI;
B->used = 64;
B->sign = PSTM_ZPOS;
memcpy(B->dp, b, 64 * sizeof(pstm_digit));
pstm_clamp(B);
return PSTM_OKAY;
}
#endif /* USE_2048_KEY_SPEED_OPTIMIZATIONS */
/******************************************************************************/
/*
*/
int32 FAST_FUNC pstm_sqr_comba(psPool_t *pool, pstm_int *A, pstm_int *B, pstm_digit *paD,
uint32 paDlen)
{
#ifdef USE_1024_KEY_SPEED_OPTIMIZATIONS
if (A->used == 16) {
return pstm_sqr_comba16(A, B);
} else {
#ifdef USE_2048_KEY_SPEED_OPTIMIZATIONS
if (A->used == 32) {
return pstm_sqr_comba32(A, B);
}
#endif /* USE_2048_KEY_SPEED_OPTIMIZATIONS */
return pstm_sqr_comba_gen(pool, A, B, paD, paDlen);
}
#else
#ifdef USE_2048_KEY_SPEED_OPTIMIZATIONS
if (A->used == 32) {
return pstm_sqr_comba32(A, B);
}
#endif /* USE_2048_KEY_SPEED_OPTIMIZATIONS */
return pstm_sqr_comba_gen(pool, A, B, paD, paDlen);
#endif
}
#endif /* DISABLE_PSTM */
/******************************************************************************/
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