Programming Forums - View Single Post - confused about the usage of Test instruction

Narue · Apr 6th, 2006, 11:52 AM

>But i dont understand the usage of "test instruction"
'test a,b' is identical to 'and a,b' except that test doesn't write the result to a. The usage reflects that. test is used when all you care about is how the flags are set after the operation.

Apr 6th, 2006, 11:52 AM	#3
Narue Professional Programmer Join Date: Sep 2005 Posts: 419 Rep Power: 4	>But i dont understand the usage of "test instruction" 'test a,b' is identical to 'and a,b' except that test doesn't write the result to a. The usage reflects that. test is used when all you care about is how the flags are set after the operation. __________________ Even if the voices aren't real, they have some pretty good ideas.