FASM 32-bit to 28-bit algorithm: remove each byte (bit 7)

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>; * -- = -- * You are given a 32 bit value where the most significant; * -- = -- * bit in each byte (bit 7) must be ignored, thus encoding; * -- = -- * a 28 bit value. write an optimal function to decode the; * -- = -- * value (strip the ignored bits ).; * -- = -- * by G-spider; * -- = -- * FASM mttest. ASM mttest.exe; >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> format PE consoleentry startinclude 'win32a. INC '; --------------------------------------------- section '. text 'Code readable executable start: stdcall _ uint32touint28, 0f7abh cinvoke printf, szfmt, eax cinvoke system, szpause RET align tags: mov eax, DWORD [esp + 4] and eax, 7f7f7f7fh movzx ECx, ax SHR eax, 16 movzx ECx, word [LUT + ECx * 2] movzx eax, word [LUT + eax * 2] SHL eax, 14 or eax, ecx ret 4; ----------------------------------------------- section '. data 'data readable writeablelut: Repeat 32768 DW (%-1) and 0x7f00) SHR 1) or (%-1) and 0x7f) end repeatszfmt dB '% x ', 0ah, 00 hszpause dB 'pause', 0; ----------------------------------------------- section '. idata 'import data readable writeable library msvcrt, 'msvcrt. DLL 'import msvcrt, \ printf, 'printf', \ System, 'system'