What is the purpose of a TEST instruction that has the same register for both operands?

Question

testl   %esi, %esi
jle .L7

I mean I understand that test actually ANDs the operands, but what is it doing in this case here?

When you read the documentation for (what processor is this) what does it say about these two instrucitons. In particular with respect to flags? The answer is right there in the documentation. — old_timer, Jul 05 '16 at 04:09

score 1 · Answer 1 · answered Jul 04 '16 at 23:49

1

The jle in the line after the testl says what happens: if esi is non-positive (0 or less), jump to .L7.

answered Jul 04 '16 at 23:49

C. K. Young

1 Answers1