add fast fast16 tests (#595)

Author: metascroy

.github/workflows/pull.yml

@@ -957,7 +957,7 @@ jobs:
 
           python torchchat.py generate --checkpoint-path ${MODEL_DIR}/stories15M.pt --temperature 0 --prompt "${PROMPT}"
 
-          for dtype in fp32 fp16 bf16; do
+          for dtype in fp32 fp16 bf16 fast fast16; do
             echo "Running export + runner with dtype=$dtype"
             python torchchat.py export --checkpoint-path ${MODEL_DIR}/stories15M.pt --dtype $dtype --output-dso-path /tmp/model.so
             ./cmake-out/aoti_run /tmp/model.so -z ${MODEL_DIR}/tokenizer.bin -i "${PROMPT}"