diff options
Diffstat (limited to 'crypto/openssl/crypto/bn/old/info')
| -rw-r--r-- | crypto/openssl/crypto/bn/old/info | 22 |
1 files changed, 0 insertions, 22 deletions
diff --git a/crypto/openssl/crypto/bn/old/info b/crypto/openssl/crypto/bn/old/info deleted file mode 100644 index 5ac99c3b2377..000000000000 --- a/crypto/openssl/crypto/bn/old/info +++ /dev/null @@ -1,22 +0,0 @@ -Given A1A0 * B1B0 == S3S2S1S0 - -S0= low(A0*B0) -S1= low( (A1-A0)*(B0-B1)) +low( A1*B1) +high(A0*B0) -S2= high((A1-A0)*(B0-B1)) +high(A1*B1) +low( A1*B1) -S3= high(A1*B1); - -Assume we know S1 and S0, and can calulate A1*B1 and high((A1-A0)*(B0-B1)) - -k0= S0 == low(A0*B0) -k1= S1 -k2= low( A1*B1) -k3= high(A1*B1) -k4= high((A1-A0)*(B0-B1)) - -k1= low((A1-A0)*(B0-B1)) +k2 +high(A0*B0) -S2= k4 +k3 +k2 -S3= k3 - -S1-k2= low((A1-A0)*(B0-B1)) +high(A0*B0) - -We potentially have a carry or a borrow from S1 |