λ x : word64 * word64 * word64,
Interp-η
(λ var : Syntax.base_type → Type,
 λ '(x3, x4, x2)%core,
 uint64_t x6, uint8_t x7 = subborrow_u64(0x0, 0x0, x2);
 uint64_t x9, uint8_t x10 = subborrow_u64(x7, 0x0, x4);
 uint64_t x12, uint8_t x13 = subborrow_u64(x10, 0x0, x3);
 uint64_t x14 = cmovznz64(x13, 0x0, 0xffffffffffffffffL);
 uint64_t x15 = (x14 & 0xfffffffffffffffdL);
 uint64_t x17, uint8_t x18 = addcarryx_u64(0x0, x6, x15);
 uint64_t x19 = (x14 & 0xffffffffffffffffL);
 uint64_t x21, uint8_t x22 = addcarryx_u64(x18, x9, x19);
 uint64_t x23 = (x14 & 0x3fffff);
 uint64_t x25, uint8_t _ = addcarryx_u64(x22, x12, x23);
 (Return x25, Return x21, Return x17))
x
     : word64 * word64 * word64 → ReturnType (uint64_t * uint64_t * uint64_t)