Does DOS MBF use mmx instructions?

The emulator I'm using doesn't emulate an mmx cpu very well but will do the same clocked one without mmx just fine.

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Honestly, I don't think that a Doom source port that was released in 1999 (or was it 1998?) uses an instruction set that Intel introduced in 1997.

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Assuming the release binaries were compiled using the Makefile in the source, they're probably optimized for a 486. There's some Pentium Pro optimized code in assembly language, but they don't appear to be using any MMX instructions (mostly some 8087 instructions to perform 64-bit moves).

 

7 hours ago, fabian said:

Honestly, I don't think that a Doom source port that was released in 1999 (or was it 1998?) uses an instruction set that Intel introduced in 1997.

DOSDoom 0.653 from 1999 has some MMX column/span drawing routines. (I had a Pentium MMX at the time but I don't remember if these helped or not. I still have that machine, I should benchmark some of this stuff sometime...)

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