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| author | Adam Ierymenko <adam.ierymenko@zerotier.com> | 2018-04-25 06:39:02 -0700 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-04-25 06:39:02 -0700 |
| commit | 42ec780a6f6eedef4d8b1d8218bd72fc6ed75cc0 (patch) | |
| tree | 7bf86c4d92d6a0f77eced79bfc33313c62c7b6dd /ext/ed25519-amd64-asm/sc25519_window4.c | |
| parent | 18c9dc8a0649c866eff9f299f20fa5b19c502e52 (diff) | |
| parent | 4608880fb06700822d01e9e5d6729fcdeb82b64b (diff) | |
| download | infinitytier-42ec780a6f6eedef4d8b1d8218bd72fc6ed75cc0.tar.gz infinitytier-42ec780a6f6eedef4d8b1d8218bd72fc6ed75cc0.zip | |
Merge branch 'dev' into netbsd-support
Diffstat (limited to 'ext/ed25519-amd64-asm/sc25519_window4.c')
| -rw-r--r-- | ext/ed25519-amd64-asm/sc25519_window4.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/ext/ed25519-amd64-asm/sc25519_window4.c b/ext/ed25519-amd64-asm/sc25519_window4.c new file mode 100644 index 00000000..683a1d4b --- /dev/null +++ b/ext/ed25519-amd64-asm/sc25519_window4.c @@ -0,0 +1,27 @@ +#include "sc25519.h" + +void sc25519_window4(signed char r[64], const sc25519 *s) +{ + char carry; + int i; + for(i=0;i<16;i++) + r[i] = (s->v[0] >> (4*i)) & 15; + for(i=0;i<16;i++) + r[i+16] = (s->v[1] >> (4*i)) & 15; + for(i=0;i<16;i++) + r[i+32] = (s->v[2] >> (4*i)) & 15; + for(i=0;i<16;i++) + r[i+48] = (s->v[3] >> (4*i)) & 15; + + /* Making it signed */ + carry = 0; + for(i=0;i<63;i++) + { + r[i] += carry; + r[i+1] += r[i] >> 4; + r[i] &= 15; + carry = r[i] >> 3; + r[i] -= carry << 4; + } + r[63] += carry; +} |