gmp help plz

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magicSqr

Joined: 27 Aug 2011
Posts: 105

magicSqr 14 Oct 2011, 21:30

Hi,

Just tried to start using gmp, thanks to goldenspider for this.

Can't get the simplest things working though Sad

Quote:

Function: void mpz_set (mpz_t rop, mpz_t op)

my code

Code:

     cinvoke mpz_init, i
     cinvoke mpz_set, i, [num]
section '.data' data readable writeable
     i          mpz_t
     num     mpz_t 34     ;tried this as dd as well, no difference

This doesn't return to the correct place. The mpz_init works fine and returns but the mpz_set disappears into the ether. The reason I was doing this in 2 steps is the same thing was happening with cinvoke mpz_init_set, i, [num]

Any idea what I'm doing wrong?

thx

14 Oct 2011, 21:30

Picnic

Joined: 05 May 2007
Posts: 1389
Location: Piraeus, Greece

Picnic 14 Oct 2011, 22:19

Hi,

I never used GMP, but i saw the integer functions 4.1: 5 and play a bit.
This works fine on my pc, outputs: 18446744073709551615

Code:

section '.text' code readable executable
start:
     cinvoke mpz_init, t1
     cinvoke mpz_init, t2
     cinvoke mpz_set_str, t2, big, 16
     cinvoke mpz_set, t1, t2
     cinvoke mpz_get_str, buff, 10, t1
     cinvoke printf, buff
     cinvoke mpz_clear, t1
     cinvoke mpz_clear, t2
     ;
     ;

section '.data' data readable writeable

     t1 mpz_t
     t2 mpz_t
     big db "FFFFFFFFFFFFFFFF",0
     buff rb 1024

To load a signed long int i used mpz_set_si

Code:

     cinvoke mpz_set_si, t1, [dval]

14 Oct 2011, 22:19

magicSqr

Joined: 27 Aug 2011
Posts: 105

magicSqr 14 Oct 2011, 23:15

Thanks for the quick reply Wink

Picnic wrote:

cinvoke mpz_set_str, t2, big, 16
section '.data' data readable writeable
big db "FFFFFFFFFFFFFFFF",0

Sorry, feeling very blond here. I have to set the number as a string first?

magic²

14 Oct 2011, 23:15

Picnic

Joined: 05 May 2007
Posts: 1389
Location: Piraeus, Greece

Picnic 15 Oct 2011, 00:22

You're welcome magicSqr.

Depends, i see there are plenty of funtions.
I tested an addition, a dword in a big number, success!
I have to practise the lib to be more helpful.

Code:

     cinvoke mpz_set_ui, t1, [dval]             ; load an unsigned long int
     cinvoke mpz_init_set_str, t2, big, 16      ; initialize & set big number

     cinvoke mpz_add, t3, t2, t1

Code:

     t1 mpz_t
     t2 mpz_t
     t3 mpz_t
     dval dd 4294967295
     big db "FFFFFFFFFFFFFFFF",0

15 Oct 2011, 00:22

magicSqr

Joined: 27 Aug 2011
Posts: 105

magicSqr 15 Oct 2011, 10:15

Thanks for the kick-start Wink

Think I'm getting there now Very Happy

Code:

format PE console
entry start

include '%fasminc%\win32a.inc'

struct MP_INT
     _mp_alloc  dd ?
     _mp_size   dd ?
     _mp_d      dd ?
ends

mpz_t fix MP_INT
;---------------------------------------------
section '.text' code readable executable
  start:

        cinvoke mpz_init_set_ui, t1, [x]
        cinvoke mpz_init_set_ui, t2, [y]
        cinvoke mpz_init, t3
        cinvoke mpz_cdiv_q, t3, t2, t1          ;(mpz_t quotient, mpz_t number, mpz_t divisor)
                                                ;if t1 or t2 weren't needed after the division
                                                ;they could be used for the quotient
        cinvoke gmp_printf, szFmt, t2, t1, t3
        cinvoke system, szPause
        ret

;---------------------------------------------
section '.data' data readable writeable

     t1         mpz_t
     t2         mpz_t
     t3         mpz_t
     x          dd 47
     y          dd 7473
     szFmt      db '%Zd / %Zd = %Zd',0ah,0
     szPause    db 'pause',0
;---------------------------------------------
section '.idata' import data readable writeable
  library libgmp,'libgmp-3.dll',\
     msvcrt,'msvcrt.dll'

  import libgmp,\
     mpz_init,'__gmpz_init',\
     mpz_init_set_ui,'__gmpz_init_set_ui',\
     mpz_cdiv_q, '__gmpz_cdiv_q',\
     gmp_printf,'__gmp_printf'

  import msvcrt,\
     printf,'printf',\
     system,'system'

magic²

15 Oct 2011, 10:15

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