Don't you miss a conditional return?

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Teehee

Joined: 05 Aug 2009
Posts: 570
Location: Brazil

Teehee 19 Sep 2011, 15:18

Code:

retne
retz
retnbe
reta

test eax,eax
retz

_________________
Sorry if bad english.

19 Sep 2011, 15:18

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20631
Location: In your JS exploiting you and your system

revolution 19 Sep 2011, 16:05

Code:

bne lr
beq lr
bhi lr

cmp r0,0
beq lr

Teehee wrote:

Don't you miss a conditional return?

No.

19 Sep 2011, 16:05

Teehee

Joined: 05 Aug 2009
Posts: 570
Location: Brazil

Teehee 19 Sep 2011, 16:07

whats that?

19 Sep 2011, 16:07

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20631
Location: In your JS exploiting you and your system

revolution 19 Sep 2011, 16:08

Follow the link.

19 Sep 2011, 16:08

Teehee

Joined: 05 Aug 2009
Posts: 570
Location: Brazil

Teehee 19 Sep 2011, 18:46

I did but still dont got it

19 Sep 2011, 18:46

edfed

Joined: 20 Feb 2006
Posts: 4354
Location: Now

edfed 19 Sep 2011, 19:28

i just need a X86 based GPU and graphic/sound card, with 1 cycle IMUL and IDIV. the conditional return is a nonsense. just do a conditinal jump to a return, that's assembly.

with a x86 sound generator, and x86 graphic generator, we will be able to code very powerfull things about graphics and sound, all managed by the system X86 based CPU.

i think the multicore CPU is good if each core have a hardware task affected, like graphics, sound, system...

with just one more x86 based DSP, we will be able to analyse sound, and just two more x86 based matrix DSP, we will be able to analyse 2 video frames (like eyes).

with just one more x86 based motor driver, we will be able to manage at least 1024 motors.

with the conditional return, we need time to implement it in core instead of using this time to implement x86 based peripherals.
the priority is not a new instruction, but a new way to use the x86 architecture.

Laughing

19 Sep 2011, 19:28

DOS386

Joined: 08 Dec 2006
Posts: 1905

DOS386 20 Sep 2011, 05:45

> Don't you miss a conditional return?

NO. I miss a conditional NOPE Wink

> with just one more x86 based motor driver, we will be able to manage at least 1024 motors

Are you brewing an artificial face ???

20 Sep 2011, 05:45

MCD

Joined: 21 Aug 2004
Posts: 602
Location: Germany

MCD 15 Dec 2011, 00:46

I certainly do for x86

15 Dec 2011, 00:46

tthsqe

Joined: 20 May 2009
Posts: 767

tthsqe 05 Jun 2012, 06:10

doesn't this do a conditional return?!

Code:

test  eax,eax
repz ret

05 Jun 2012, 06:10

Teehee

Joined: 05 Aug 2009
Posts: 570
Location: Brazil

Teehee 05 Jun 2012, 12:22

does it? :O
never saw that, neither even known about the possibility of rep with ret. :O

05 Jun 2012, 12:22

JohnFound

Joined: 16 Jun 2003
Posts: 3499
Location: Bulgaria

JohnFound 05 Jun 2012, 12:54

No, It doesn't.

05 Jun 2012, 12:54

shutdownall

Joined: 02 Apr 2010
Posts: 517
Location: Munich

shutdownall 05 Jun 2012, 16:32

Teehee wrote:

Code:

retne
retz
retnbe
reta

test eax,eax
retz

Could do it this way:

Code:

retz

jnz @f
ret
@@: <continue code here>

05 Jun 2012, 16:32

tthsqe

Joined: 20 May 2009
Posts: 767

tthsqe 05 Jun 2012, 20:00

Sorry - I bad. I though it would have this behavior:

eax = 0 -> do not repeat ret instruction so execution falls through
eax != 0 -> ret instruction is repeated which after one repetition the ret is accomplished

05 Jun 2012, 20:00

bzdashek

Joined: 15 Feb 2012
Posts: 147
Location: Tolstokvashino, Russia

bzdashek 06 Jun 2012, 04:52

I miss these commands in x86:

BNE - Branch to Non-Existent code

BNR - Branch for No Reason.

BRA - Branch to Random Address

BVS - Branch to Virtual Subroutine

CLD - CalL a Doctor

CMD - Create Meaningless Data.

DEC - DElete the Code

DRA - Decrement Random Address.

EDR - Emit Deadly Radiation.

JMP - Jump if Memory Present (conditional jump)

LLI - Lose Last Instruction.

PRS - Push Results off Stack.

RIS - Remain In Subroutine.

RTI - Return from the Infinity

SHB - Scramble High order Bit.

TEC - Take Extra time for Calculation

@revolution:
FASMARM is interesting thing, thanks!

06 Jun 2012, 04:52

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