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flat assembler > Examples and Tutorials > BASELIB: General purpose libs for beginners

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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
This is BASELIB, a set of general-purpose library intended for absolute beginners, each for linux and windows, that I hope can help newbies with their assembly programming at the earliest learning curve.

NOTE:
I am migrating my BASELIB/CPULIB project to Sourceforge now as the files are getting larger in size. You can download the updates and other goodies from either one of these;

1. Sourceforge baselibs project. Browse the files
2. Directly from my Google Drive

Good luck and enjoy your coding.


Last edited by fasmnewbie on 05 Nov 2018, 19:44; edited 330 times in total
Post 03 May 2015, 05:33
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80286



Joined: 01 May 2015
Posts: 15
Hello fasmnewbie,

thanks for your library; I am still working with it to become familiar with the very basic instructions and functions; it helped me understand some of the first few bits of this GiB-sized thing called 64bit-assembler.

Only 2 remarks:
1. The routines #56 (str_tolower) and #57 (str_alternate) do what they should, but not what I expected known from other languages: All chars except SPACE are modified by OR al,0x20. I think it should only work on letters (at least 7-bit-ASCII-letters; local differences (i. e. french, german) must be handled in an additional way).

2. Routine #18 (getchr): I don't know why it ends the program if ENTER is pressed to end the input. All I do is:
Code:
mov rcx,inputbuffer1
call getchr ; liest staendig Zeichen ein und gibt an Cursorposition aus, bis ENTER gedrueckt wird
call newline ; Cursor links/rechts zum Navigieren in Eingabe; ESC oder Cursor hoch loescht Eingabe
call newline

call exitp

inputbuffer1: db 1024 dup(0)    


Is there somthing special to know about that getchr?
Post 04 May 2015, 10:44
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
Alternative download sites;

1. Sourceforge
2. Google Drive / BASEUPLOADS

Hope you'd find them useful and helpful in your entire assembly learning phases.


Regards


Last edited by fasmnewbie on 19 Aug 2018, 17:04; edited 19 times in total
Post 04 May 2015, 16:24
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
I added the Windows DLL versions of the library (base6.zip and base3.zip)

This version also includes a template file (each) so that you can re-compile the DLL source in case you have made any changes.

Includes 4 sample files on how to access and use the library.


Last edited by fasmnewbie on 05 Apr 2016, 13:30; edited 9 times in total
Post 04 May 2015, 16:38
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80286



Joined: 01 May 2015
Posts: 15
Hello fasmnewbie,

thanks for your detailed answer.

Yes, I am actually trying to work with Windows 8.1 64bit, straight from a long time with XP 32bit Smile
Those instructions after the 80286 are new to me, so it will become an interesting activity to make things work as I want them to (I hope there will still be enough time for me to learn all that is needed).

Your Routines #19 (getstr) and #20 (getstrz) work as expected and don't close the program. That's what I needed for the moment. Still there is some trouble with Cursor Up, but maybe that is because of the local keyboarddriver. I will handle that later.

I will test more of your Routines and give you a feedback. I am quite excited what awaits me with these mysterious xmm-Registers Smile
Post 04 May 2015, 17:15
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
Here I included the 32-bit library stack version for the sake of beginners who'd have to rely on other assembler source codes for 32-bit examples or to be used along with textbooks / reference that are using 32-bit code.

They are directly adapted from the register-based versions so you might expect some minor bugs in there. If you found none, then praise the lord xD


Last edited by fasmnewbie on 23 Mar 2016, 14:13; edited 8 times in total
Post 05 May 2015, 13:26
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
Just managed to get my hand on a Linux PC... so this is the Linux SO for 64-bit. I cut down the complicated steps in producing the SO so beginners don't have to play with gcc and other configuration headaches. Read the PDF file on how to access and where to place the library


Last edited by fasmnewbie on 05 Apr 2016, 13:31; edited 6 times in total
Post 05 May 2015, 13:31
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80286



Joined: 01 May 2015
Posts: 15
Hello fasmnewbie,

thanks again for your examplecode.
To get a better overwiew I found these tables about the registers on wikipedia:
Image

Now it is more clear to me with what I can work.
(Somehow I conider this as the "fingers", with wich I will form the code.)

Still there are so many fundamentals/basics I have to get to know. So it might take some more days to get my very first real 64bit-assembler-program running (not only compiling examples and ready-to-use-sources).
What a luck FASM is available, Tomasz Grysztar is still active after all these years, and also this forum that's like a treasure chest, esp. for newcomers.
Post 05 May 2015, 16:32
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
remove post


Last edited by fasmnewbie on 22 May 2015, 04:57; edited 2 times in total
Post 05 May 2015, 18:55
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
80286

Good luck to you. There are a bunch of people on this board who can help you with that. Most of them are 5-star programmers (most are my gurus). Stay longer and you can identify who they are. NOT me though. I am quite hopeless in assembly and have the tendency to lose my index register somewhere in the middle. Hahaha!!
Post 05 May 2015, 19:11
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80286



Joined: 01 May 2015
Posts: 15
Hello fasmnewbie,

I was just experimenting with doubles and singles and xmm0.

(Subnote: As I tried to code a subroutine for zeroing the doubles-buffer I remarked: There is no DS- and no ES-Register anymore - strange, if you usually used DS:SI and ES:DI for these lods/stos-things)

Using your routines #11 (prtdbl) and #12 (prntflt) for inputs 256.554 I got the outputs 256.5439999999999 and 256.5439
I suggest it could only be a fault in presentation because no operations on the values are made. But how could I get a more exact output if ever possible?

My complete code (except your routines) actually is:

Code:
format PE64 console
include 'win64axp.inc'
jmp codestart

;<place data here>
align 64
string1: db 'Testtext#1',0
string2: db 'Danke für Ihre Eingabe!',0
inputbuffer1: db 1024 dup(0)
align 64
doubles1: db 227 dup(0)

;<place code here>
align 64
codestart:
call zerodoubles1 ; Speicher fuer Doubles loeschen
mov rcx,256.554 ; MUSS mit Dezimaltrennzeichen geschrieben werden, sonst falscher Wert!
movq xmm0,rcx ; NO DIRECT IMMIDIATE
call prtdbl

call newline
call newline
call zerodoubles1; Speicher fuer Doubles loeschen
mov ecx,256.5540 ; MUSS mit Dezimaltrennzeichen geschrieben werden, sonst falscher Wert!
movd xmm0,ecx ; NO DIRECT IMMIDIATE
call prtflt


call newline
call newline

call exitp

zerodoubles1:
pushf
push rax
push rcx
push rdi
mov rdi,doubles1
sub al,al
mov rcx,227
cld
rep stosb
pop rdi
pop rcx
pop rax
popf
ret
    


I don't know wether the zeroing-subroutine is working as it should; used to manage to handle a disassembler for those purposes.

edit:
Just saw your new lib and will have a look at it.
Post 05 May 2015, 19:16
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
post removed


Last edited by fasmnewbie on 28 May 2015, 14:32; edited 1 time in total
Post 05 May 2015, 20:03
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80286



Joined: 01 May 2015
Posts: 15
Thanks again, fasmnewbie. I will heed your advices.
Post 05 May 2015, 20:28
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
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Last edited by fasmnewbie on 28 May 2015, 14:33; edited 1 time in total
Post 05 May 2015, 20:32
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
remove post.
Post 13 May 2015, 15:04
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
post removed


Last edited by fasmnewbie on 26 May 2015, 21:30; edited 1 time in total
Post 23 May 2015, 12:58
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
1. I updated my comment in Post #1 to reflect the new update and notes.

2. Notes to beginners on align and unalign data while using SSE-related routines;

All SSE-based routines are unaligned because I intend to make those routines to be as flexible as possible in aligned and non-aligned situations.

To use aligned instructions (like movdqa, you need to explicitly align your data to be used by the SSE instructions, failure of which will give you segment fault error. Example;

Code:
format ELF64 executable 3 ;Linux example

movdqa xmm3,dqword[x]   ;aligned transfer instruction
movdqa xmm1,dqword[y]   ;aligned transfer instruction
divps xmm1,xmm3
mov rax,8    ;option to display 4 packed singles.
call dumpxmm   ;dump xmm register in packed single format (rax=0).

call exit
align 16            ;---------> use align 16
x dd 34.557,0.034,-74.323,1.001
y dd 0.23,5.34,7.77,-3.023    


Producing this output;
Code:
XMM0 : 0.0|0.0|0.0|0.0
XMM1 : -3.019980|-0.104543|157.0588|0.006655
XMM2 : 0.0|0.0|0.0|0.0
XMM3 : 1.001000|-74.32300|0.034000|34.55700
XMM4 : 0.0|0.0|0.0|0.0
XMM5 : 0.0|0.0|0.0|0.0
XMM6 : 0.0|0.0|0.0|0.0
XMM7 : 0.0|0.0|0.0|0.0
XMM8 : 0.0|0.0|0.0|0.0
XMM9 : 0.0|0.0|0.0|0.0
XMM10: 0.0|0.0|0.0|0.0
XMM11: 0.0|0.0|0.0|0.0
XMM12: 0.0|0.0|0.0|0.0
XMM13: 0.0|0.0|0.0|0.0
XMM14: 0.0|0.0|0.0|0.0
XMM15: 0.0|0.0|0.0|0.0    


If you opted for un-aligned instruction, you can skip the "align 16" part as shown by another example below;

Code:
format PE64 console ;windows example
include 'win64axp.inc'

movdqu xmm1,dqword[x] ;unalign transfer
movdqu xmm0,dqword[y] ;unalign transfer
divpd xmm0,xmm1
mov rax,9         ;option to display as 2 packed doubles
call dumpxmm

call exitp
x dq 34.557,0.034        ;align 16 is missing but recommended
y dq 0.23,5.34    


Which produces this output;

Code:
XMM0 : 157.0588235294117|0.006655670341754
XMM1 : 0.033999999999999|34.55700000000000
XMM2 : 0.0|0.0
XMM3 : 0.0|0.0
XMM4 : 0.0|0.0
XMM5 : 0.0|0.0
XMM6 : 0.0|0.0
XMM7 : 0.0|0.0
XMM8 : 0.0|0.0
XMM9 : 0.0|0.0
XMM10: 0.0|0.0
XMM11: 0.0|0.0
XMM12: 0.0|0.0
XMM13: 0.0|0.0
XMM14: 0.0|0.0
XMM15: 0.0|0.0    


I hope these 2 examples can clear some confusions while using the supplied SSE-based routines.

Good luck.


Last edited by fasmnewbie on 17 Jun 2015, 00:41; edited 2 times in total
Post 26 May 2015, 20:08
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16102
Location: Squiddler's Patch
If you are concerned about performance then using unaligned transfers will hurt you. Even using MOVDQU on aligned data can hurt performance.
Post 27 May 2015, 00:31
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fasmnewbie



Joined: 01 Mar 2011
Posts: 540
revolution wrote:
If you are concerned about performance then using unaligned transfers will hurt you. Even using MOVDQU on aligned data can hurt performance.
Agreed. But for this lib, I just want to make things work first.

Off topic: Revo, if I remove my old posts / attachments, will it help reduce the site load or regain the site quota in some way? I see Haha doing it a lot.
Post 28 May 2015, 14:40
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16102
Location: Squiddler's Patch
fasmnewbie wrote:
Off topic: Revo, if I remove my old posts / attachments, will it help reduce the site load or regain the site quota in some way? I see Haha doing it a lot.
I'm not the one to ask because I don't have access to such things, but I suspect it makes very little difference.

I would request that you don't remove or destroy your old posts. It makes the board less useful and hard to follow. Some other people have deleted/destroyed old posts, but the reason was not to help improve the site.
Post 28 May 2015, 15:16
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