turboscrew's Profile User Rating: -----

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03-April 12
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Posts I've Made

  1. In Topic: What does mean this error in Assembly ?

    Posted 9 Feb 2016

    Mä en taida saada mitään tolkkua noista postauksista...
  2. In Topic: Help with understanding MIPS Assembler Code

    Posted 9 Feb 2016

    Maybe the AIK manual pages 7 and 9 gives some idea?

    There is at least:


    lui $rt,imm := 15:6 0:5 rt:5 imm:16
    .Shift $rd,$rt,shamt := 0:6 0:5 rt:5 rd:5 shamt:5 .this:6
    .alias .Shift sll 2 srl

    Sorry, that I can't be of much help, but this is the first time I see this kind of notation.
  3. In Topic: Beginner Question

    Posted 7 Feb 2016

    Does this explain:

    MIPS register names and conventions

    Number Name Usage Preserved?
    ------ ------- ----------------------- ----------
    $0 $zero constant 0x00000000 N/A
    $1 $at assembler temporary No
    $2-$3 $v0-$v1 function return values No
    $4-$7 $a0-$a3 function arguments No
    $8-$15 $t0-$t7 temporaries No
    $16-$23 $s0-$s7 saved temporaries Yes
    $24-$25 $t8-$t9 more temporaries No
    $26-$27 $k0-$k1 reserved for OS kernel N/A
    $28 $gp global pointer Yes
    $29 $sp stack pointer Yes
    $30 $fp frame pointer Yes
    $31 $ra return address Yes
  4. In Topic: Help with understanding MIPS Assembler Code

    Posted 6 Feb 2016

    Like " 0:6 rs:5 "?
    I don't know, but I suspect it's a field - bit-length pair. 0:6 = six zero-bits, rs-field = 5 bits...

    I think this is 'if - else':
    JBR L ?((L-.<=256)&&(L-.>=-254)) := BR:8 (L-.)/2:8
    JBR L := JMP:16 L:16

    The ?(...) being the condition.
  5. In Topic: Help with understanding MIPS Assembler Code

    Posted 4 Feb 2016

    It looks like some kind of bit field definitions of instructions with some pre-defined operation parts. Getting into bottom of that seems quite hard without any further information.

    Maybe you could compare those definitions with the binary representation of MIPS instructions?

    This might be helpful:

My Information

Member Title:
D.I.C Addict
53 years old
February 6, 1963
Nokia (town), Finland
Computers, programming, different branches of science, different branches of technology
Full Name:
Juha Aaltonen
Years Programming:
Programming Languages:
C, C++, Ada, Pascal, Lisp, Occam, Forth, Fortran and some assembly
(6502, 6800, 6809, 68000, 8085, 8031, PDP11/70, basics of C64x+ and PPC)

Contact Information




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  1. Photo

    askyy Icon

    06 Apr 2013 - 19:42
    would you like tom give me some help doing a programm in aseembly MIPS to verify if a number is power of two?
  2. Photo

    cool_moon Icon

    24 Apr 2012 - 03:49
    I didnt undestand ur explanation will u please explain it clearly
  3. Photo

    cool_moon Icon

    23 Apr 2012 - 23:29
    hi..Im new to lpc1768 please help me to understand the GPIO selection. how to select the gpio. i worked in mc8051 but it is entirly different from that. kindly help me
  4. Photo

    jon.kiparsky Icon

    10 Apr 2012 - 23:53
    Well, I've tried to set up a discussion. Let's see what comes of it.
    In answer to your question, I found my way to Finnish because my father is a Finn, and I'm interested in languages. As I say, though, Finnish defeated me pretty soundly.
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