80     pub(crate) fn mask_to_width(&self, bit_width: u32) -> Self {  in mask_to_width()
81         debug_assert!(bit_width.is_power_of_two());  in mask_to_width()
83         if bit_width >= 64 {  in mask_to_width()
87         let bit_width = i64::from(bit_width);  in mask_to_width()  localVariable
88         let mask = (1 << bit_width) - 1;  in mask_to_width()
96     pub fn sign_extend_from_width(&self, bit_width: u32) -> Self {  in sign_extend_from_width()
98             bit_width.is_power_of_two(),  in sign_extend_from_width()
102         if bit_width >= 64 {  in sign_extend_from_width()
106         let bit_width = i64::from(bit_width);  in sign_extend_from_width()  localVariable
107         let delta = 64 - bit_width;  in sign_extend_from_width()
115     pub fn zero_extend_from_width(&self, bit_width: u32) -> Self {  in zero_extend_from_width()
117             bit_width.is_power_of_two(),  in zero_extend_from_width()
121         if bit_width >= 64 {  in zero_extend_from_width()
125         let bit_width = u64::from(bit_width);  in zero_extend_from_width()  localVariable
126         let delta = 64 - bit_width;  in zero_extend_from_width()