HPPA assembly ADDI nullification

[RATEFIARIVONY]

Hi All!
Please can anyone explain me why this:
addi,< 0x10, 0, 24 nullify the next instruction and:
addi,< 0x2, 0, 26 don't...
Anyone have an idea ?

[ranganath ramachandra]

there are 2 differences between these two instructions. you specify different immediate operands and you also specify different register operands. the behaviour will naturally depend on the register contents. you can find more information about the instruction itself in the PA-RISC architecture document:
http://h21007.www2.hp.com/dspp/tech/tech_TechDocumentDetailPage_IDX/1,1701,959!57!244,00.html

[ranganath ramachandra]

i'm sorry, i'm obviously wrong.

[ranganath ramachandra]

or am i ... i wasnt sure i correctly interpreted the use of the second register operand ('t').

[RATEFIARIVONY]

So what's the corrct one ?
Anyway thanks for replying :-)

[ranganath ramachandra]

well i tried out both on a 9000/800 and neither of them nullified the next instruction. are you sure you got it right ?

[RATEFIARIVONY]

Sure dude!
I'm on a hpux 11.00 64 L1000.
But don't bother anymore, i will padd it with dummy instruction like copy r26, r26

Thanks for your time!