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tls: code shrink in AES code

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function                                             old     new   delta
aes_cbc_decrypt                                      862     847     -15

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2020-12-15 18:47:25 +01:00
parent fad8d6b6c0
commit 4a9ec95565
1 changed files with 3 additions and 3 deletions
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6
networking/tls_aes.c
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@ -313,15 +313,15 @@ static void InvMixColumns(unsigned astate[16])
d = astate[i + 3]; d = astate[i + 3];
x = (a << 1) ^ (a << 2) ^ (a << 3) ^ b ^ (b << 1) ^ (b << 3) x = (a << 1) ^ (a << 2) ^ (a << 3) ^ b ^ (b << 1) ^ (b << 3)
/***/ ^ c ^ (c << 2) ^ (c << 3) ^ d ^ (d << 3); /***/ ^ c ^ (c << 2) ^ (c << 3) ^ d ^ (d << 3);
astate[i + 0] = Multiply(x);
y = a ^ (a << 3) ^ (b << 1) ^ (b << 2) ^ (b << 3) y = a ^ (a << 3) ^ (b << 1) ^ (b << 2) ^ (b << 3)
/***/ ^ c ^ (c << 1) ^ (c << 3) ^ d ^ (d << 2) ^ (d << 3); /***/ ^ c ^ (c << 1) ^ (c << 3) ^ d ^ (d << 2) ^ (d << 3);
astate[i + 1] = Multiply(y);
z = a ^ (a << 2) ^ (a << 3) ^ b ^ (b << 3) z = a ^ (a << 2) ^ (a << 3) ^ b ^ (b << 3)
/***/ ^ (c << 1) ^ (c << 2) ^ (c << 3) ^ d ^ (d << 1) ^ (d << 3); /***/ ^ (c << 1) ^ (c << 2) ^ (c << 3) ^ d ^ (d << 1) ^ (d << 3);
astate[i + 2] = Multiply(z);
t = a ^ (a << 1) ^ (a << 3) ^ b ^ (b << 2) ^ (b << 3) t = a ^ (a << 1) ^ (a << 3) ^ b ^ (b << 2) ^ (b << 3)
/***/ ^ c ^ (c << 3) ^ (d << 1) ^ (d << 2) ^ (d << 3); /***/ ^ c ^ (c << 3) ^ (d << 1) ^ (d << 2) ^ (d << 3);
astate[i + 0] = Multiply(x);
astate[i + 1] = Multiply(y);
astate[i + 2] = Multiply(z);
astate[i + 3] = Multiply(t); astate[i + 3] = Multiply(t);
} }
} }