PureBasic Forums - English

Friendly greetings \o/

When i work on a project a create 2 additionnal executable : produce-asm.exe and reassemble.exe.
They are just calling the pb compiler with the right option :
- to produce a .asm file
- to compile the asm code i just modified in a .exe

It can totally easily be done from ...

You can use Bochs (x86 emulator), i love it !


When you're using Bochs with the internal debugger, you can trigger the debugger via a facility called magic breakpoints. To trigger a breakpoint, you can insert xchg bx, bx (in GAS syntax, xchgw %bx, %bx) anywhere in the code and Bochs will trap ...

only very partially then. Since they have different function call conventions.

This PDF from intel have a lot of AES related assembly code : http://www.intel.fr/content/dam/doc/white-paper/advanced-encryption-standard-new-instructions-set-paper.pdf
You probably checked https://en.wikipedia.org/wiki/AES_instruction_set i guess ?
The reference section seems to have a lot of ...

wilbert wrote: It makes it very difficult to write cross platform code this way that works on all systems.

Cross platform assembly ???

i know there is no lock on the array, it produce slightly inaccurate (imperceptible) result but that's on purpose.
It's massive performance tradeoff (i have a C++ version of this code that was profiled with Intel VTune)

The full code. It's ugly and in progress :)
(but it produce a nice fractal)


;
; Buddhabrot generator

EnableExplicit


;RunProgram(#PB_Compiler_Home+"\Compilers\pbcompiler.exe", Chr(34)+ "E:\purebasic\buddhabrot3\main.pb" + Chr(34) + " /COMMENTED /SSE2 /EXE " + Chr(34)+ "E:\purebasic\buddhabrot3 ...

Sure, as soon as i ask i find the solution ^^
(i'm on it since 1h ...)

Hello ! I can'tt make it works, i have an invalid memory access error.

Here is the definition

Structure ExposureStruct
R.f
G.f
B.f
A.f
EndStructure

Global Dim exposure.ExposureStruct(screenSize2)




In the main code i call the thread :

CreateThread(@iterateThread(), exposure())


Here ...

Sticky \o/

TL;DR : programming error.

Your first loop go to 0 to 5
The 2nd loop go to 1 to 5

When i modify the 1st loop to go from 1 to 5 i get correct result.

1) Your code is pretty much unreadable
2) The output is horrible.
3) Comments in french (i speak french, that's why i could do it)

The modified ...

Procedure.f mrdrand()
Define r.f
Define d.f = 536870911
Define two.f = 2
EnableASM
! RDRAND eax
! MOV dword [p.v_r], eax
! FILD dword [p.v_r]
! FDIV dword [p.v_d]
! FSUB dword [p.v_two]
! FST dword [p.v_d]
! MOV EAX, [p.v_d]
DisableASM
ProcedureReturn
EndProcedure

well, it's in the manual of course !!

- It's possible to pass directly an assembly line to the assembler without being processed by the compiler by using the '!' character at the line start. This allow to have a full access to the assembler directives. When using this, it's possible to reference ...

mine support it. (i7 4770k)

what is this ! operator ?
now i have an error on the next instruction :D

The code i created using /REASM :


_Procedure4:
;PS4=48
;SUB rsp,40
;
;
;
; ProcedureReturn ((Random(2147483647)/(536870911)) - 2.0)
;PUSH qword 2147483647
;POP rcx
;CALL PB_Random
;MOV ...

Procedure.f mrdrand()
EnableASM
;MOV RAX, 0
RDRAND EAX
DisableASM
ProcedureReturn
EndProcedure


I get a syntax error on RDRAND line.
(works if i comment it and uncomment the previous one. but... well... obviously, i want a random number as a result, not 0 :p )

btw, i rand some test, RDRAND ...