Merge remote-tracking branch 'monero-project/master' into blockchain

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Thomas Winget 2015-02-05 08:51:19 -05:00
commit fc62af5cf8
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3 changed files with 62 additions and 4 deletions

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@ -28,6 +28,22 @@ As with many development projects, the repository on Github is considered to be
Anyone is able to contribute to Monero. If you have a fix or code change, feel free to submit is as a pull request directly to the "development" branch. In cases where the change is relatively small or does not affect other parts of the codebase it may be merged in immediately by any one of the collaborators. On the other hand, if the change is particularly large or complex, it is expected that it will be discussed at length either well in advance of the pull request being submitted, or even directly on the pull request.
## Supporting the Project
Monero development can be supported directly through donations.
Both Monero and Bitcoin donations can be made to donate.monero.cc if using a client that supports the [OpenAlias](https://openalias.org) standard
The Monero donation address is: 46BeWrHpwXmHDpDEUmZBWZfoQpdc6HaERCNmx1pEYL2rAcuwufPN9rXHHtyUA4QVy66qeFQkn6sfK8aHYjA3jk3o1Bv16em (viewkey: e422831985c9205238ef84daf6805526c14d96fd7b059fe68c7ab98e495e5703)
The Bitcoin donation address is: 1FhnVJi2V1k4MqXm2nHoEbY5LV7FPai7bb
Core development funding and/or some supporting services are also graciously provided by sponsors:
[![MyMonero](http://i.imgur.com/xdp7mNG.png?)](https://mymonero.com) [![Dome9](http://i.imgur.com/THVVafx.png)](http://dome9.com)
There are also several mining pools that kindly donate a portion of their fees, [a list of them can be found on our Bitcointalk post](https://bitcointalk.org/index.php?topic=583449.0).
## License
Copyright (c) 2014-2015, The Monero Project

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@ -627,6 +627,18 @@ void cn_slow_hash(const void *data, size_t length, char *hash)
#else
// Portable implementation as a fallback
void slow_hash_allocate_state(void)
{
// Do nothing, this is just to maintain compatibility with the upgraded slow-hash.c
return;
}
void slow_hash_free_state(void)
{
// As above
return;
}
static void (*const extra_hashes[4])(const void *, size_t, char *) = {
hash_extra_blake, hash_extra_groestl, hash_extra_jh, hash_extra_skein
};

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@ -56,10 +56,40 @@ namespace cryptonote {
#else
static inline void mul(uint64_t a, uint64_t b, uint64_t &low, uint64_t &high) {
typedef unsigned __int128 uint128_t;
uint128_t res = (uint128_t) a * (uint128_t) b;
low = (uint64_t) res;
high = (uint64_t) (res >> 64);
// __int128 isn't part of the standard, so the previous function wasn't portable. mul128() in Windows is fine,
// but this portable function should be used elsewhere. Credit for this function goes to latexi95.
uint64_t aLow = a & 0xFFFFFFFF;
uint64_t aHigh = a >> 32;
uint64_t bLow = b & 0xFFFFFFFF;
uint64_t bHigh = b >> 32;
uint64_t res = aLow * bLow;
uint64_t lowRes1 = res & 0xFFFFFFFF;
uint64_t carry = res >> 32;
res = aHigh * bLow + carry;
uint64_t highResHigh1 = res >> 32;
uint64_t highResLow1 = res & 0xFFFFFFFF;
res = aLow * bHigh;
uint64_t lowRes2 = res & 0xFFFFFFFF;
carry = res >> 32;
res = aHigh * bHigh + carry;
uint64_t highResHigh2 = res >> 32;
uint64_t highResLow2 = res & 0xFFFFFFFF;
//Addition
uint64_t r = highResLow1 + lowRes2;
carry = r >> 32;
low = (r << 32) | lowRes1;
r = highResHigh1 + highResLow2 + carry;
uint64_t d3 = r & 0xFFFFFFFF;
carry = r >> 32;
r = highResHigh2 + carry;
high = d3 | (r << 32);
}
#endif