67     let (mut rhi, mut rlo) = mul(nx.m, ny.m);  in fma()
85                 rlo = rhi << (64 - d) | rlo >> d | ((rlo << (64 - d)) != 0) as u64;  in fma()
88                 rlo = 1;  in fma()
110         rlo = rlo.wrapping_add(zlo);  in fma()
111         rhi += zhi + (rlo < zlo) as u64;  in fma()
114         let (res, borrow) = rlo.overflowing_sub(zlo);  in fma()
115         rlo = res;  in fma()
118             rlo = (rlo as i64).wrapping_neg() as u64;  in fma()
119             rhi = (rhi as i64).wrapping_neg() as u64 - (rlo != 0) as u64;  in fma()
130         rhi = rhi << d | rlo >> (64 - d) | ((rlo << d) != 0) as u64;  in fma()
131     } else if rlo != 0 {  in fma()
132         d = rlo.leading_zeros() as i32 - 1;  in fma()
134             rhi = rlo >> 1 | (rlo & 1);  in fma()
136             rhi = rlo << d;  in fma()