λ x : word64 * word64 * word64 * word64,
Interp-η
(λ var : Syntax.base_type → Type,
 λ '(x5, x6, x4, x2)%core,
 uint64_t x8, uint8_t x9 = Op (Syntax.SubWithGetBorrow 48 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (0x0, Return x2, 0xffffffffffed);
 uint64_t x11, uint8_t x12 = Op (Syntax.SubWithGetBorrow 48 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (Return x9, Return x4, 0xffffffffffff);
 uint64_t x14, uint8_t x15 = Op (Syntax.SubWithGetBorrow 48 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (Return x12, Return x6, 0xffffffffffff);
 uint64_t x17, uint8_t x18 = Op (Syntax.SubWithGetBorrow 47 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (Return x15, Return x5, 0x7fffffffffff);
 uint64_t x19 = cmovznz64(x18, 0x0, 0xffffffffffffffffL);
 uint64_t x20 = (x19 & 0xffffffffffed);
 uint64_t x22, uint8_t x23 = Op (Syntax.AddWithGetCarry 48 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (0x0, Return x8, Return x20);
 uint64_t x24 = (x19 & 0xffffffffffff);
 uint64_t x26, uint8_t x27 = Op (Syntax.AddWithGetCarry 48 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (Return x23, Return x11, Return x24);
 uint64_t x28 = (x19 & 0xffffffffffff);
 uint64_t x30, uint8_t x31 = Op (Syntax.AddWithGetCarry 48 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (Return x27, Return x14, Return x28);
 uint64_t x32 = (x19 & 0x7fffffffffff);
 uint64_t x34, uint8_t _ = Op (Syntax.AddWithGetCarry 47 (Syntax.TWord 3) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 6) (Syntax.TWord 3)) (Return x31, Return x17, Return x32);
 (Return x34, Return x30, Return x26, Return x22))
x
     : word64 * word64 * word64 * word64 → ReturnType (uint64_t * uint64_t * uint64_t * uint64_t)