Fix issue with no of prompt less than FBS (quic#132)

Signed-off-by: Rishin Raj <rishinr@qti.qualcomm.com>

QEfficient/generation/text_generation_inference.py

@@ -170,16 +170,29 @@ def get_input_prompts(prompt: str, prompts_txt_file_path: str) -> List[str]:
 
 
 def fix_prompts(prompt: List[str], batch_size: int, full_batch_size: int = None):
-    if len(prompt) < batch_size or (full_batch_size is not None and len(prompt) < full_batch_size):
+    """
+    Adjusts the list of prompts to match the required batch size.
+
+    ``Mandatory`` Args:
+        prompt (List[str]): List of input prompts.
+        batch_size (int): The batch size to process at a time.
+
+    ``Optional`` Args:
+        full_batch_size (Optional[int]): The full batch size if different from batch_size.
+
+    Returns:
+        List[str]: Adjusted list of prompts.
+    """
+    exec_batch_size = full_batch_size if full_batch_size is not None else batch_size
+
+    if len(prompt) < exec_batch_size:
         logger.warning("Number of prompts are less than batch size/full batch size, repeating to required batch size")
-        prompt = prompt * -(batch_size // -len(prompt))  # Repeat prompt to required size
-        prompt = prompt[:batch_size]  # Truncate prompts to required size
-    elif not full_batch_size:
-        if (len(prompt) % batch_size) > 0:
-            logger.warning(
-                "Number of prompts are not multiple of batch size, dropping last incomplete batch from given input prompts"
-            )
-            prompt = prompt[: batch_size * (len(prompt) // batch_size)]
+        prompt = (prompt * (exec_batch_size // len(prompt) + 1))[:exec_batch_size]
+    elif full_batch_size is None and len(prompt) % batch_size != 0:
+        logger.warning(
+            "Number of prompts are not multiple of batch size, dropping last incomplete batch from given input prompts"
+        )
+        prompt = prompt[: batch_size * (len(prompt) // batch_size)]
 
     return prompt