λ x : word64 * word64 * word64 * word64 * word64 * word64 * word64,
Interp-η
(λ var : Syntax.base_type → Type,
 λ '(x11, x12, x10, x8, x6, x4, x2)%core,
 uint128_t x13 = (((uint128_t)x2 * x11) + (((uint128_t)x4 * x12) + ((0x2 * ((uint128_t)x6 * x10)) + (((uint128_t)x8 * x8) + ((0x2 * ((uint128_t)x10 * x6)) + (((uint128_t)x12 * x4) + ((uint128_t)x11 * x2)))))));
 uint128_t x14 = ((((uint128_t)x2 * x12) + ((0x2 * ((uint128_t)x4 * x10)) + ((0x2 * ((uint128_t)x6 * x8)) + ((0x2 * ((uint128_t)x8 * x6)) + ((0x2 * ((uint128_t)x10 * x4)) + ((uint128_t)x12 * x2)))))) + ((0x3d1 * (0x2 * ((uint128_t)x11 * x11))) + (0x100000000 * (0x2 * ((uint128_t)x11 * x11)))));
 uint128_t x15 = ((((uint128_t)x2 * x10) + (((uint128_t)x4 * x8) + ((0x2 * ((uint128_t)x6 * x6)) + (((uint128_t)x8 * x4) + ((uint128_t)x10 * x2))))) + ((0x3d1 * (((uint128_t)x12 * x11) + ((uint128_t)x11 * x12))) + (0x100000000 * (((uint128_t)x12 * x11) + ((uint128_t)x11 * x12)))));
 uint128_t x16 = ((((uint128_t)x2 * x8) + ((0x2 * ((uint128_t)x4 * x6)) + ((0x2 * ((uint128_t)x6 * x4)) + ((uint128_t)x8 * x2)))) + ((0x3d1 * ((0x2 * ((uint128_t)x10 * x11)) + (((uint128_t)x12 * x12) + (0x2 * ((uint128_t)x11 * x10))))) + (0x100000000 * ((0x2 * ((uint128_t)x10 * x11)) + (((uint128_t)x12 * x12) + (0x2 * ((uint128_t)x11 * x10)))))));
 uint128_t x17 = ((((uint128_t)x2 * x6) + (((uint128_t)x4 * x4) + ((uint128_t)x6 * x2))) + ((0x3d1 * (((uint128_t)x8 * x11) + (((uint128_t)x10 * x12) + (((uint128_t)x12 * x10) + ((uint128_t)x11 * x8))))) + (0x100000000 * (((uint128_t)x8 * x11) + (((uint128_t)x10 * x12) + (((uint128_t)x12 * x10) + ((uint128_t)x11 * x8)))))));
 uint128_t x18 = ((((uint128_t)x2 * x4) + ((uint128_t)x4 * x2)) + ((0x3d1 * ((0x2 * ((uint128_t)x6 * x11)) + (((uint128_t)x8 * x12) + ((0x2 * ((uint128_t)x10 * x10)) + (((uint128_t)x12 * x8) + (0x2 * ((uint128_t)x11 * x6))))))) + (0x100000000 * ((0x2 * ((uint128_t)x6 * x11)) + (((uint128_t)x8 * x12) + ((0x2 * ((uint128_t)x10 * x10)) + (((uint128_t)x12 * x8) + (0x2 * ((uint128_t)x11 * x6)))))))));
 uint128_t x19 = (((uint128_t)x2 * x2) + ((0x3d1 * ((0x2 * ((uint128_t)x4 * x11)) + ((0x2 * ((uint128_t)x6 * x12)) + ((0x2 * ((uint128_t)x8 * x10)) + ((0x2 * ((uint128_t)x10 * x8)) + ((0x2 * ((uint128_t)x12 * x6)) + (0x2 * ((uint128_t)x11 * x4)))))))) + (0x100000000 * ((0x2 * ((uint128_t)x4 * x11)) + ((0x2 * ((uint128_t)x6 * x12)) + ((0x2 * ((uint128_t)x8 * x10)) + ((0x2 * ((uint128_t)x10 * x8)) + ((0x2 * ((uint128_t)x12 * x6)) + (0x2 * ((uint128_t)x11 * x4))))))))));
 uint64_t x20 = (uint64_t) (x13 >> 0x24);
 uint64_t x21 = ((uint64_t)x13 & 0xfffffffff);
 uint128_t x22 = (((uint128_t)0x1000000000 * x20) + x21);
 uint64_t x23 = (uint64_t) (x22 >> 0x24);
 uint64_t x24 = ((uint64_t)x22 & 0xfffffffff);
 uint128_t x25 = (((uint128_t)0x1000000000 * x23) + x24);
 uint64_t x26 = (uint64_t) (x25 >> 0x24);
 uint64_t x27 = ((uint64_t)x25 & 0xfffffffff);
 uint128_t x28 = (x19 + ((0x3d1 * x26) + ((uint128_t)0x100000000 * x26)));
 uint128_t x29 = (x28 >> 0x25);
 uint64_t x30 = ((uint64_t)x28 & 0x1fffffffff);
 uint128_t x31 = (x29 + x18);
 uint128_t x32 = (x31 >> 0x25);
 uint64_t x33 = ((uint64_t)x31 & 0x1fffffffff);
 uint128_t x34 = (x32 + x17);
 uint128_t x35 = (x34 >> 0x24);
 uint64_t x36 = ((uint64_t)x34 & 0xfffffffff);
 uint128_t x37 = (x35 + x16);
 uint128_t x38 = (x37 >> 0x25);
 uint64_t x39 = ((uint64_t)x37 & 0x1fffffffff);
 uint128_t x40 = (x38 + x15);
 uint128_t x41 = (x40 >> 0x24);
 uint64_t x42 = ((uint64_t)x40 & 0xfffffffff);
 uint128_t x43 = (x41 + x14);
 uint128_t x44 = (x43 >> 0x25);
 uint64_t x45 = ((uint64_t)x43 & 0x1fffffffff);
 uint128_t x46 = (x44 + x27);
 uint64_t x47 = (uint64_t) (x46 >> 0x24);
 uint64_t x48 = ((uint64_t)x46 & 0xfffffffff);
 uint128_t x49 = (x30 + ((0x3d1 * x47) + ((uint128_t)0x100000000 * x47)));
 uint64_t x50 = (uint64_t) (x49 >> 0x25);
 uint64_t x51 = ((uint64_t)x49 & 0x1fffffffff);
 uint64_t x52 = (x51 >> 0x25);
 uint64_t x53 = (x51 & 0x1fffffffff);
 return (Return x48, Return x45, Return x42, Return x39, Return x36, (x52 + (x50 + x33)), Return x53))
x
     : word64 * word64 * word64 * word64 * word64 * word64 * word64 → ReturnType (uint64_t * uint64_t * uint64_t * uint64_t * uint64_t * uint64_t * uint64_t)