tbuffer_load_format_x address calculation

[tspeterkim]

For the test_300 unit test, the gold trace is:

tbuffer_load_format_x  v9, v0, s[0:3], s6 offen offset:29 format:[BUF_DATA_FORMAT_32,BUF_NUM_FORMAT_UNORM] // 0000001C: E820101D 06000900
t0: V9<=(1)(-2037788549,-5.184e-35f) t1: V9<=(1)(-203778854 ...

Just from the instruction offset of 29, the final address should be something larger or equal to 29 but the gold trace says it is 1.

The RTL corresponding to the address calculation looks correct:

assign out_temp = `BASE_VALUE + scalar_source_b + imm_value0 + (off_en ? {12'b0, vector_source_b} : 48'd0) + (`STRIDE_VALUE * (tid + (idx_en ? vector_source_b : 48'b0)));

And this matches with the equation given in the ISA in 8.1.1.

How is the gold trace able to calculate the address as 1? Is the gold trace wrong here?

[zwabbit]

Looking at the instruction, unfortunately this might be one of those cases where the simulator used to generate the golden case doesn't handle things correctly. The memory interface was one of the major weakpoints in the original MIAOW implementation and while enough of it was implemented to get certain benchmarks running, it was definitely never optimized or implemented in a way to actually be ASIC or even FPGA feasible.

[tspeterkim]

I see. About the benchmarks, I have not been able to get any of the included benchmarks to run as well. Specifically, they're unable to finish. I have included the BinarySearch's log as an example. The first divergent trace comes from the instruction mentioned above.

Is there a specific commit that should be able to complete the benchmarks? I've checked out the initial commit of the repo but the error still persists.

Would appreciate any tips on how to get the benchmarks to run.

summary.txt

[zwabbit]

Unfortunately, I do not have that information. I joined the project after the initial set of benchmarks were run and only handled FPGA porting related tasks. Presently I'm also no longer affiliated with UW so I don't have access to any archival checkouts/working environments.