Displaying 2 results from an estimated 2 matches for "siub".
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sib
2019 Jul 17
1
Having trouble getting started on writing a WDC 65816 backend
...6502. There is a stack pointer that can't be directly
> accessed, but only used in push and pop and transferred to or from
> another register. There is a condition code register that can only be
> accessed implicitly or by pushing or popping it to the stack.
> Arithmetic such as add/siub/and/or/xor can only be done with the A
> register. Increment and decrement can only be done with the X and Y
> registers, not the A register. The (zp,reg) addressing mode can only
> be used with the X register. The (zp),reg addressing mode can only use
> the Y register.
Is it not the j...
2019 Jul 09
5
Having trouble getting started on writing a WDC 65816 backend
I asked about this in IRC ~2.5 hours ago:
<srnb> I'm trying to write an LLVM backend for the WDC 65816 (for usage in compiling SNES code) but I have very little experience with how C++ works and LLVM's CMakeLists. I'm trying to follow the guide but I don't know how to check if the project builds after my changes or how to test a small amount of C with it once I get it