Etwas

drand48_sub     proc near


iterations      = dword ptr  4

                mov     edx, [esp+iterations]
                cmp     edx, 100h
                push    esi
                push    edi
                mov     esi, ecx
                jnb     short morethan255 ; jumps when not carry
                mov     eax, [esi+4]
                mov     ecx, [esi]
                shl     edx, 4
                push    eax
                mov     edi, edx
                mov     edx, dword ptr (seedTable+4)[edi]
                mov     eax, dword ptr seedTable[edi] ; contains 1
                push    ecx
                push    edx
                push    eax
                call    __allmul
                add     eax, dword ptr (seedTable+8)[edi]
                adc     edx, dword ptr (seedTable+0Ch)[edi] ; contains 5DEECE66D (drand48 multiplier)
                pop     edi
                mov     [esi+4], edx
                mov     [esi], eax
                pop     esi
                retn    4
; ---------------------------------------------------------------------------

morethan255:                            ; CODE XREF: drand48_sub+Ej
                test    edx, edx        ; clears carry, zero = edx==0
                mov     eax, [esi]
                mov     ecx, [esi+4]
                jbe     short return    ; jumps on carry or zero
                mov     edi, edx

rand48_loop:                            ; CODE XREF: drand48_sub+69j
                push    5
                push    0DEECE66Dh      ; drand48 multiplier
                push    ecx
                push    eax
                call    __allmul
                add     eax, 0Bh
                adc     edx, 0
                sub     edi, 1
                mov     ecx, edx
                jnz     short rand48_loop

return:                                 ; CODE XREF: drand48_sub+4Cj
                pop     edi
                mov     [esi+4], ecx
                mov     [esi], eax
                pop     esi
                retn    4
drand48_sub     endp