Update Makefile for HIPBLAS

[YellowRoseCx]

This update

• changes the DMMV_Y variable to the newer MMV_Y variable
• exposes some extra options for the user to change such as "LLAMA_CUDA_KQUANTS_ITER" and "LLAMA_CUDA_KQUANTS_ITER"
• sets MMV_Y variable to any DMMV_Y just in case for backwards compatibility
• sets CUDA_FORCE_DMMV to 'true' after observing output and reports of garbled output
• moves the ggml-cuda.o: CXXFLAGS into ifdef statements

Tested and working on latest build on a 6800xt

[SlyEcho]

Adding it to CXXFLAGS like that will define those for all of the code instead of just ggm-cuda.cu, the CUDA version uses a different variable so it is isolated, but what was the problem with target-specific variables?

[SlyEcho]

We should keep it the same as the CUDA version:

Suggested change

	ifeq ($(LLAMA_CUDA_FORCE_DMMV), true)
	ifdef LLAMA_CUDA_FORCE_DMMV

[YellowRoseCx]

How would using ifdef work with a true/false boolean? The upstream makefile for CuBLAS doesn't look complete or correct

[SlyEcho]

Well, it's usually defined to be anything to turn it on, not true or false.

[YellowRoseCx]

what was the problem with target-specific variables

What target-specific variables?

[SlyEcho]

It used to be:

LLAMA_CUDA_DMMV_X ?= 32
ggml-cuda.o: CXXFLAGS += -DGGML_CUDA_DMMV_X=$(LLAMA_CUDA_DMMV_X)

That means that when making the target ggml-cuda.o the CXXFLAGS will have these added definitions. But when making some other target, like common.o for example, these definitions will not be present.

The CUDA version uses this:

ifdef LLAMA_CUDA_DMMV_X
	NVCCFLAGS += -DGGML_CUDA_DMMV_X=$(LLAMA_CUDA_DMMV_X)
else
	NVCCFLAGS += -DGGML_CUDA_DMMV_X=32
endif # LLAMA_CUDA_DMMV_X

Well, it does the same thing but in 5 lines. But the difference here is that it uses a different Make variable NVCCFLAGS, which should only be used on the ggml-cuda.cu file as well.

So maybe we can use a different variable like HIPFLAGS or something?

[SlyEcho]

I think I got the variable changes working now except for the backwards compatibility with LLAMA_CUDA_DMMV_Y