rj@amiga.UUCP (Robert J. Mical) (02/20/88)
I'm looking for the algorithms that Motorola used for MULU, MULS, DIVU and DIVS. Is this stuff public information? Can anyone give me reference? -RJ Mical
schmidt@mpre.UUCP (Doug Schmidt) (02/24/88)
In article <1988@amiga.UUCP>, rj@amiga.UUCP (Robert J. Mical) writes: > I'm looking for the algorithms that Motorola used for MULU, MULS, DIVU and > DIVS. Is this stuff public information? Can anyone give me reference? > -RJ Mical > Along that same line of questioning: ... Can someone mail me a little chunk of 68000 assembly code that will divide a 48-bit signed integer by a 32-bit signed integer? I need it for some fast math calculations in a C program I'm working on. (My C compiler comes with an assembler). Any books that I have been able to find only give examples of 32 by 32 bit division, but I haven't been able to successfully extend their algorithms to 48 bits. I know that this is pretty simple, but then again, so am I. :-) The math that I need to do is fixed point math, but I am using an old 512K Mac with the old 64K ROMS. These ROMS don't have the fixed-point division routine that the newer 128K and 256K ROMS do. So if anyone can dis-assemble their new ROMS, I could use that code directly. Thanx in advance, Doug Schmidt Microtel Pacific Research Burnaby, BC CANADA PS. Remember when they called 512K Macs "Fat"? Now they're "Anorexic". :-) DISCLAIMER: I'd rather have a bottle in front of me than a frontal lobotomy.