package runtime
-// sizeToClass(0 <= n <= MaxSmallSize) returns the size class,
-// 1 <= sizeclass < NumSizeClasses, for n.
-// Size class 0 is reserved to mean "not small".
-//
-// The sizeToClass lookup is implemented using two arrays,
-// one mapping sizes <= 1024 to their class and one mapping
-// sizes >= 1024 and <= MaxSmallSize to their class.
-// All objects are 8-aligned, so the first array is indexed by
-// the size divided by 8 (rounded up). Objects >= 1024 bytes
-// are 128-aligned, so the second array is indexed by the
-// size divided by 128 (rounded up). The arrays are constants
-// in sizeclass.go generated by mksizeclass.go.
-func sizeToClass(size uint32) uint32 {
- if size > _MaxSmallSize {
- throw("invalid size")
- }
- if size > smallSizeMax-8 {
- return uint32(size_to_class128[(size-smallSizeMax+largeSizeDiv-1)/largeSizeDiv])
- }
- return uint32(size_to_class8[(size+smallSizeDiv-1)/smallSizeDiv])
-}
-
// Returns size of the memory block that mallocgc will allocate if you ask for the size.
func roundupsize(size uintptr) uintptr {
if size < _MaxSmallSize {