Motorola 68000: What is STEQ, STGT, STLT, etc?

[axelnieves2012]

Hello. Using Gens tracer I have found some opcodes called STEQ, STGT and STLT.
I tried to google them but google always corrects me and shows me results for "STEP" (even looking for "+steq", even using "quotes", even using -step, etc),

Well, I haven't found any info about this opcodes. I think they are conditionals just like BEQ, BGT and BLT but I'm not sure what they are for.

Thanks in advance

[Tony H]

Don't recall seeing those before, but you're probably right... The EQ, GT, and LT are probably EQual to, Greater Than, and Less Than. If you figure it out, post your findings.

A little heads up on a minor problem with Gens Tracer assembly logs. Whenever it shows a 50xx "add" instruction, it incorrectly shows it as adding #0, but it is actually adding #8. The assembly is correct, it just shows the wrong number.

Example: 00:103C 50 8F ADDQ.L #0,A7

Should be: 00:103C 50 8F ADDQ.L #8,A7

EDIT: In case you haven't seen it yet, there is a VERY useful list of 68000 instructions (by Puggsy) in our Library: http://gamehacking.org/library

EDIT2: In Puggsy's list, you'll find: SEQ, SGT, SLT, as well as others. Not sure if they're the same as what you're looking for, but you will get results with Google (ie. 68000 SLT). The "S" stands for Set.

[Pyriel]

http://www.freescale.com/files/archi.../M68000PRM.pdf

If you go down to page 276, you'll find the, "Set According to Condition" operations. Probably GENS has a bad mnemonic ("ST" instead of "S") or else they believed the True and False flags were part of the directive.