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Bring C bn_mul_mont template closer to assembler.

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This commit is contained in:
Andy Polyakov 2008-12-16 07:28:38 +00:00
parent ac71d81e84
commit 3ebbe8853f
1 changed files with 24 additions and 2 deletions
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26
crypto/bn/bn_asm.c
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@ -860,13 +860,35 @@ int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, const BN_U
n0 = *n0p;
tp[num] = bn_mul_words(tp,ap,num,bp[0]);
c0 = 0;
ml = bp[0];
#ifdef mul64
mh = HBITS(ml);
ml = LBITS(ml);
for (j=0;j<num;++j)
mul(tp[j],ap[j],ml,mh,c0);
#else
for (j=0;j<num;++j)
mul(tp[j],ap[j],ml,c0);
#endif
tp[num] = c0;
tp[num+1] = 0;
goto enter;
for(i=0;i<num;i++)
{
c0 = bn_mul_add_words(tp,ap,num,bp[i]);
c0 = 0;
ml = bp[i];
#ifdef mul64
mh = HBITS(ml);
ml = LBITS(ml);
for (j=0;j<num;++j)
mul_add(tp[j],ap[j],ml,mh,c0);
#else
for (j=0;j<num;++j)
mul_add(tp[j],ap[j],ml,c0);
#endif
c1 = (tp[num] + c0)&BN_MASK2;
tp[num] = c1;
tp[num+1] = (c1<c0?1:0);