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dont do indirection in for batch stuff

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cathugger
2020-11-22 10:21:06 +00:00
parent 5b5f414b79
commit 51d87c3857
19 changed files with 86 additions and 71 deletions
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18
ed25519/ed25519-donna/curve25519-donna-helpers.h
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@@ -67,23 +67,31 @@ curve25519_setone(bignum25519 out) {
* if that's the case then we're doing batch invert there
*/
static void
curve25519_batchrecip(bignum25519 *out[], bignum25519 tmp[], bignum25519 * const in[], size_t num) {
bignum25519 ALIGN(16) acc, tmpacc;
curve25519_batchrecip(bignum25519 *out, const bignum25519 *in, bignum25519 *tmp, size_t num, size_t offset) {
bignum25519 ALIGN(16) acc,tmpacc;
size_t i;
const bignum25519 *inp;
bignum25519 *outp;
curve25519_setone(acc);
inp = in;
for (i = 0; i < num; ++i) {
curve25519_copy(tmp[i], acc);
curve25519_mul(acc, acc, *in[i]);
curve25519_mul(acc, acc, *inp);
inp = (const bignum25519 *)((const char *)inp + offset);
}
curve25519_recip(acc, acc);
i = num;
inp = (const bignum25519 *)((const char *)in + offset * num);
outp = (bignum25519 *)((char *)out + offset * num);
while (i--) {
curve25519_mul(tmpacc, acc, *in[i]);
curve25519_mul(*out[i], acc, tmp[i]);
inp = (const bignum25519 *)((const char *)inp - offset);
outp = (bignum25519 *)((char *)outp - offset);
curve25519_mul(tmpacc, acc, *inp);
curve25519_mul(*outp, acc, tmp[i]);
curve25519_copy(acc, tmpacc);
}
}