Sync from v0.13

vllm/utils/math_utils.py

@@ -0,0 +1,32 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+"""Math utility functions for vLLM."""
+
+
+def cdiv(a: int, b: int) -> int:
+    """Ceiling division."""
+    return -(a // -b)
+
+
+def next_power_of_2(n: int) -> int:
+    """The next power of 2 (inclusive)"""
+    if n < 1:
+        return 1
+    return 1 << (n - 1).bit_length()
+
+
+def prev_power_of_2(n: int) -> int:
+    """The previous power of 2 (inclusive)"""
+    if n <= 0:
+        return 0
+    return 1 << (n.bit_length() - 1)
+
+
+def round_up(x: int, y: int) -> int:
+    """Round up x to the nearest multiple of y."""
+    return ((x + y - 1) // y) * y
+
+
+def round_down(x: int, y: int) -> int:
+    """Round down x to the nearest multiple of y."""
+    return (x // y) * y