[fasmg] Lucas Prime Test

flat assembler > Macroinstructions > [fasmg] Lucas Prime Test

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bitRAKE

Joined: 21 Jul 2003
Posts: 2784
Location: dank orb

Code:

; is F a factor of 2^N-1
macro MFactorQ N*,F*
        local B,T,D
        D = 1 + bsr F
        B = 1
        T = 1
        while B < N & T
                if (B+D) <= N
                        T = ((T+1) shl D)-1
                        B = B + D
                        T = T mod F
                else
                        T = T + T + 1
                        B = B + 1
                        if T >= F
                                T = T mod F
                        end if
                end if
        end while
        repeat 1,t:T,b:B,f:F
                if T = 0
                        display `f,' divides 2^',`b,'-1.',13,10
                else
                        display '2^',`b,'-1 mod ',`f,' = ',`t,13,10
                end if
        end repeat
end macro

MFactorQ 1001664179, 1878753956886303627167 ; 2 min
MFactorQ 3930621659, 6134708376727152865752497 ; 10 min

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17 Feb 2019, 17:57

bitRAKE

Joined: 21 Jul 2003
Posts: 2784
Location: dank orb

Is there an a way to terminate the assembly process without producing an error? I don't want an output file, but presently am using "err 'No Output File'".

Code:

test-file.fasmg [66]:
        err 'No Output File'
Custom error: No Output File.
The terminal process terminated with exit code: 1

I need to prune zero length files from the directory or parse around "no file errors" to find actual errors. Another solution would be to output to NUL, but this too splits the build process. It would be nice to have a solution within the source itself.

Maybe "format null" could not produce a file?

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27 Feb 2019, 01:27

bitRAKE

Joined: 21 Jul 2003
Posts: 2784
Location: dank orb

bitRAKE wrote:

Next I try to verify some data: There is list of cube sums at https://arxiv.org/abs/1604.07746v1

The answer is 42 !

https://www.youtube.com/watch?v=ASoz_NuIvP0

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13 Mar 2019, 02:00

bitRAKE

Joined: 21 Jul 2003
Posts: 2784
Location: dank orb

Tried to encapsulate commandline option testing to something like:

Code:

OPTION "s","silent"
        bts [Options.FLAGS],FLAG_SILENT
END OPTION

OPTION "h","help"
        mov rax,[.pArgv]
        push qword [rax]
        lea rdx,[HelpMessage]
        call STD_OUTPUT_HANDLE__wsprintfA
        pop rax
END OPTION

... which resulted in the following try ...

Code:

Options.count = 0

macro OPTION text&
        local skip
        macro END.OPTION!
                        label skip.0
                esc end macro
                end repeat
                purge END.OPTION
        end macro

        Options.count = Options.count + 1
        repeat 1,i:Options.count
        esc macro Options.i
                iterate txt,text
                        virtual at 1
                                ; rely on DU to convert UTF8 to widechar
                                du txt
                                load temp: $-1 from $$
                        end virtual
                        if % = %%
                                skip.temp = 1
                        end if
                        repeat ((bsr temp) shr 4) + 2
Display "0"+%% ; 1?
                                if % = %%
                                        if % and 1
                                                cmp word [rsi+2*(%+1)],temp
                                        else
                                                cmp dword [rsi+2*(%+1)],temp
                                        end if
                                        if skip.temp
                                                ; fall through to process, if txt is last alternative
                                                jnz skip.0
                                        else
                                                ; jump over alternatives to process
                                                jz skip.dont
                                        end if
                                else if ~ (% and 1)
                                        cmp dword [rsi+2*(%+2)],temp and $FFFFFFFF
                                        temp = temp shr 32
                                        if skip.temp
                                                ; if txt is last alternative skip process
                                                jnz skip.0
                                        else
                                                ; try next alternative
                                                jnz skip.%
                                        end if
                                end if
                        end repeat
                        label skip.%
                end iterate
                label skip.dont
end macro

macro __OPTIONS
        postpone ?
        repeat Options.count
                Options.%
        end repeat
        end postpone
end macro

Can't seem to get this to work as expected. Completely baffled how REPEAT ?+2 could result in %%=1.

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14 Jul 2019, 11:45

Tomasz Grysztar
Assembly Artist

Joined: 16 Jun 2003
Posts: 7299
Location: Kraków, Poland

bitRAKE wrote:

Can't seem to get this to work as expected. Completely baffled how REPEAT ?+2 could result in %%=1.

When you define a macro inside a REPEAT block, the "%%" in the text of the inner macro is replaced with a number. So the body of your macro contains a hard-coded number in place of every occurrence of "%%" (and the same goes for "%").

To make matters worse, "%" and "%%" are global parameters (not limited by a scope, as long as you are inside some repeated block, they have a value), so even encapsulating the macro definition would not save you here.

14 Jul 2019, 11:52

Tomasz Grysztar
Assembly Artist

Joined: 16 Jun 2003
Posts: 7299
Location: Kraków, Poland

A reduced sample that demonstrates the problem:

Code:

repeat 1,i:1
        macro Options.i
                iterate txt, 'a','b','c'
                        display '0'+%%
                end iterate
        end macro
end repeat

Options.1

And a kind of a messy solution:

Code:

macro preserve_counters? %:%, %%:%%
        macro end?.preserve_counters?
                end match
        end macro
        outscope match %:%%, %:%%
end macro


repeat 1,i:1
        preserve_counters
                macro Options.i
                        iterate txt, 'a','b','c'
                                display '0'+%%
                        end iterate
                end macro
        end preserve_counters
end repeat

Options.1

But in this case I think it would be better to just get rid of the outer REPEAT, for example by using MATCH to extract the name of macro to define from a symbolic variable (you could even maintain Options.count as a symbolic variable).

14 Jul 2019, 12:14

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