Quantized GGUF style (#1523)

* Metal quantized modifications proposal.

- Add a device param, wherever needed.
- Create new QMetal storage thing that implements QuantizedType.
- Update everywhere needed.

Fix Python.

Fixing examples.

Fix: fmt + clippy + stub.

Moving everything around.

Only missing the actual implems.

Fixing everything + adding dequantized kernels.

More work.

Fixing matmul.

Fmt + Clippy

Some clippy fixes.

Working state.

Q2K Metal -> Bugged (also present in GGML).
Q4K CPU -> Bugged (present previously, new test catch it).
Q5K CPU -> Bugged (present previously).
Q8_1 Both -> Never really implemented it seems
Q8K metal -> Never implemented in metal

Fixing Q2K bug (present in ggml).

* Cleanup.

* Fix the rebase.

* Removing the fences speeds everything up and *is* correct this time...

* Cleanup the fence.

* After rebase.

* Bad code removal.

* Rebase after phi2 merge + fix replit default to CPU.

* Making the CI happy.

* More happy tests.

---------

Co-authored-by: Nicolas Patry <nicolas@Nicolass-MacBook-Pro.local>

1 files changed, 6 insertions, 7 deletions

diff --git a/candle-examples/examples/replit-code/main.rs b/candle-examples/examples/replit-code/main.rs
index 0f72b862..b7f767b9 100644
--- a/candle-examples/examples/replit-code/main.rs
+++ b/candle-examples/examples/replit-code/main.rs
@@ -236,16 +236,15 @@ fn main() -> Result<()> {
     let tokenizer = Tokenizer::from_file(tokenizer_filename).map_err(E::msg)?;
 
     let start = std::time::Instant::now();
+    let device = candle_examples::device(args.cpu)?;
     let config = Config::replit_code_v1_5_3b();
-    let (model, device) = if args.quantized {
-        let vb = candle_transformers::quantized_var_builder::VarBuilder::from_gguf(&filename)?;
-        let model = Model::Q(Q::new(&config, vb.pp("transformer"))?);
-        (model, Device::Cpu)
+    let model = if args.quantized {
+        let vb =
+            candle_transformers::quantized_var_builder::VarBuilder::from_gguf(&filename, &device)?;
+        Model::Q(Q::new(&config, vb.pp("transformer"))?)
     } else {
-        let device = candle_examples::device(args.cpu)?;
         let vb = unsafe { VarBuilder::from_mmaped_safetensors(&[filename], DType::F32, &device)? };
-        let model = Model::M(M::new(&config, vb.pp("transformer"))?);
-        (model, device)
+        Model::M(M::new(&config, vb.pp("transformer"))?)
     };
     println!("loaded the model in {:?}", start.elapsed());