In this patch, a Gladiator's "white attack" value consists of its weapon attack, as shown by @CCCP, and the base stat "Power", which is 115.
This means the white attack value you see in your profile is in reality 15% higher than it actually is.
To calculate your actual "base attack" you have to add your weapon's min- and max-attack and divide it by two. If you add 15% from "Power" on top of that, you'll get the white attack value you see in your profile.
Example:
699 white attack in profile
457-759 weapon attack
(457 + 759) / 2 = 608 base attack
608 * 0.8 = 486 additional attack by using Berserking