compare auxiliary flag

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Ali.Z

Joined: 08 Jan 2018
Posts: 732

Ali.Z 28 Jun 2018, 12:45

is this the best way to compare af?
jnz - jumps if af was set?

Code:

pushf
pop ax
test al,0x10
jnz

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Asm For Wise Humans

28 Jun 2018, 12:45

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20451
Location: In your JS exploiting you and your system

revolution 28 Jun 2018, 12:49

There is also lahf. But I don't know what you mean by "best", because lahf is not available in all CPU modes, so maybe it isn't good for you.

Code:

lahf
test ah,0x10
jnz ...

28 Jun 2018, 12:49

Ali.Z

Joined: 08 Jan 2018
Posts: 732

Ali.Z 28 Jun 2018, 13:18

my cpu:
LAHF/SAHF support in 64-bit mode

thanks again rev, you are cool.

_________________
Asm For Wise Humans

28 Jun 2018, 13:18

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