if (window >= 5) {
window = 5; /* ~5% improvement for RSA2048 sign, and even
* for RSA4096 */
- if ((top & 7) == 0)
- powerbufLen += 2 * top * sizeof(m->d[0]);
+ /* reserve space for mont->N.d[] copy */
+ powerbufLen += top * sizeof(mont->N.d[0]);
}
#endif
(void)0;
const BN_ULONG *not_used, const BN_ULONG *np,
const BN_ULONG *n0, int num);
- BN_ULONG *np = mont->N.d, *n0 = mont->n0, *np2;
+ BN_ULONG *n0 = mont->n0, *np;
/*
* BN_to_montgomery can contaminate words above .top [in
for (i = tmp.top; i < top; i++)
tmp.d[i] = 0;
- if (top & 7)
- np2 = np;
- else
- for (np2 = am.d + top, i = 0; i < top; i++)
- np2[2 * i] = np[i];
+ /*
+ * copy mont->N.d[] to improve cache locality
+ */
+ for (np = am.d + top, i = 0; i < top; i++)
+ np[i] = mont->N.d[i];
bn_scatter5(tmp.d, top, powerbuf, 0);
bn_scatter5(am.d, am.top, powerbuf, 1);
# if 0
for (i = 3; i < 32; i++) {
/* Calculate a^i = a^(i-1) * a */
- bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np2, n0, top, i - 1);
+ bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np, n0, top, i - 1);
bn_scatter5(tmp.d, top, powerbuf, i);
}
# else
}
for (i = 3; i < 8; i += 2) {
int j;
- bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np2, n0, top, i - 1);
+ bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np, n0, top, i - 1);
bn_scatter5(tmp.d, top, powerbuf, i);
for (j = 2 * i; j < 32; j *= 2) {
bn_mul_mont(tmp.d, tmp.d, tmp.d, np, n0, top);
}
}
for (; i < 16; i += 2) {
- bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np2, n0, top, i - 1);
+ bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np, n0, top, i - 1);
bn_scatter5(tmp.d, top, powerbuf, i);
bn_mul_mont(tmp.d, tmp.d, tmp.d, np, n0, top);
bn_scatter5(tmp.d, top, powerbuf, 2 * i);
}
for (; i < 32; i += 2) {
- bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np2, n0, top, i - 1);
+ bn_mul_mont_gather5(tmp.d, am.d, powerbuf, np, n0, top, i - 1);
bn_scatter5(tmp.d, top, powerbuf, i);
}
# endif
while (bits >= 0) {
wvalue = bn_get_bits5(p->d, bits - 4);
bits -= 5;
- bn_power5(tmp.d, tmp.d, powerbuf, np2, n0, top, wvalue);
+ bn_power5(tmp.d, tmp.d, powerbuf, np, n0, top, wvalue);
}
}
- ret = bn_from_montgomery(tmp.d, tmp.d, NULL, np2, n0, top);
+ ret = bn_from_montgomery(tmp.d, tmp.d, NULL, np, n0, top);
tmp.top = top;
bn_correct_top(&tmp);
if (ret) {