I just needed to remove an obsolete guardrail in render-line.
Still seeing some bugs with left-arrow when playing around with the full
expansion of `1 2+`.
Starting to work. I'm still seeing problems in lines with multiple expanded
calls, but perhaps that's a rendering issue.
The code is absolutely ghastly.
Rendering is still ugly. Cursor isn't on the right row. But the hard part
is behind us.
This was a stupid mistake in function-body, and it happened because I've
been getting lazy and passing (addr handle) objects when I should be passing
in "constant" addr objects.
I'm not sure why I was so resistant to debugging by print here. I spent
3 days waffling about with this bug.
We don't have tests yet in the tile prototype, mostly because we don't
yet feel confident about what desired behavior should be. But it's still
helpful to have a non-interactive mode for tracking down segfaults.
Snapshot that requires a check in the Mu compiler.
Currently I don't spill a register if it could possibly be over-written
by a function output within. However, find-in-call-path is a good example
of where this constraint is too lenient and results in unsafe code. The
variable `curr` gets clobbered during loop update by the variable `match?`.
What's the answer? Perhaps we should ban all conditional updates to function
outputs? That'd be dashed inconvenient.
The final fix to the raytracing program involves rounding modes. It turns
out x86 processors round floats by default, unlike C which has trained
me to expect truncation. Rather than mess with the MXCSR register, I added
another instruction for truncation. Now milestone 3 emits perfectly correct
results.
The image is now visually indistinguishable from the baseline, though the
file isn't quite bit-for-bit correct.
I found 3 bugs:
a) I forgot to normalize the ray. After creating a helper to "automatically"
do it for me, it turns out said helper requires manually using.
b) I forgot to multiply by t at one place.
c) vec3-length was half-written.
For the umpteenth time, the bugs were all in the last place I looked. I
was worried about spending a lot of time transcribing `main` without any
feedback, but that turned out to be perfect.
Kartik Agaram
Kartik Agaram
Jimmy Miller