λ x x0 : word64 * word64 * word64 * word64 * word64,
Interp-η
(λ var : Syntax.base_type → Type,
 λ '(x10, x11, x9, x7, x5, (x18, x19, x17, x15, x13))%core,
 uint128_t x20 = ((((uint128_t)x5 * x18) + ((0x2 * ((uint128_t)x7 * x19)) + (((uint128_t)x9 * x17) + ((0x2 * ((uint128_t)x11 * x15)) + ((uint128_t)x10 * x13))))) + (0x4000000 * ((uint128_t)x10 * x18)));
 uint128_t x21 = ((((uint128_t)x5 * x19) + (((uint128_t)x7 * x17) + (((uint128_t)x9 * x15) + ((uint128_t)x11 * x13)))) + (((uint128_t)x10 * x18) + (0x2000000 * ((0x2 * ((uint128_t)x11 * x18)) + (0x2 * ((uint128_t)x10 * x19))))));
 uint128_t x22 = ((((uint128_t)x5 * x17) + ((0x2 * ((uint128_t)x7 * x15)) + ((uint128_t)x9 * x13))) + (((0x2 * ((uint128_t)x11 * x18)) + (0x2 * ((uint128_t)x10 * x19))) + (0x4000000 * (((uint128_t)x9 * x18) + ((0x2 * ((uint128_t)x11 * x19)) + ((uint128_t)x10 * x17))))));
 uint128_t x23 = ((((uint128_t)x5 * x15) + ((uint128_t)x7 * x13)) + ((((uint128_t)x9 * x18) + ((0x2 * ((uint128_t)x11 * x19)) + ((uint128_t)x10 * x17))) + (0x2000000 * ((0x2 * ((uint128_t)x7 * x18)) + ((0x2 * ((uint128_t)x9 * x19)) + ((0x2 * ((uint128_t)x11 * x17)) + (0x2 * ((uint128_t)x10 * x15))))))));
 uint128_t x24 = (((uint128_t)x5 * x13) + ((0x2 * ((uint128_t)x7 * x18)) + ((0x2 * ((uint128_t)x9 * x19)) + ((0x2 * ((uint128_t)x11 * x17)) + (0x2 * ((uint128_t)x10 * x15))))));
 uint64_t x25 = (uint64_t) (x24 >> 0x27);
 uint64_t x26 = ((uint64_t)x24 & 0x7fffffffff);
 uint128_t x27 = (x20 >> 0x26);
 uint64_t x28 = ((uint64_t)x20 & 0x3fffffffff);
 uint128_t x29 = ((0x4000000000 * x27) + x28);
 uint128_t x30 = (x29 >> 0x26);
 uint64_t x31 = ((uint64_t)x29 & 0x3fffffffff);
 uint128_t x32 = ((x25 + x23) + (0x2000000 * x30));
 uint128_t x33 = (x32 >> 0x26);
 uint64_t x34 = ((uint64_t)x32 & 0x3fffffffff);
 uint128_t x35 = (x26 + x30);
 uint64_t x36 = (uint64_t) (x35 >> 0x27);
 uint64_t x37 = ((uint64_t)x35 & 0x7fffffffff);
 uint128_t x38 = (x33 + x22);
 uint128_t x39 = (x38 >> 0x27);
 uint64_t x40 = ((uint64_t)x38 & 0x7fffffffff);
 uint128_t x41 = (x39 + x21);
 uint128_t x42 = (x41 >> 0x26);
 uint64_t x43 = ((uint64_t)x41 & 0x3fffffffff);
 uint128_t x44 = (x42 + x31);
 uint64_t x45 = (uint64_t) (x44 >> 0x26);
 uint64_t x46 = ((uint64_t)x44 & 0x3fffffffff);
 uint128_t x47 = (((uint128_t)0x4000000000 * x45) + x46);
 uint64_t x48 = (uint64_t) (x47 >> 0x26);
 uint64_t x49 = ((uint64_t)x47 & 0x3fffffffff);
 uint64_t x50 = ((x36 + x34) + (0x2000000 * x48));
 uint64_t x51 = (x50 >> 0x26);
 uint64_t x52 = (x50 & 0x3fffffffff);
 uint64_t x53 = (x37 + x48);
 uint64_t x54 = (x53 >> 0x27);
 uint64_t x55 = (x53 & 0x7fffffffff);
 return (Return x49, Return x43, (x51 + x40), (x54 + x52), Return x55))
(x, x0)%core
     : word64 * word64 * word64 * word64 * word64 → word64 * word64 * word64 * word64 * word64 → ReturnType (uint64_t * uint64_t * uint64_t * uint64_t * uint64_t)