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+Require Import Crypto.Arithmetic.PrimeFieldTheorems.
+Require Import Crypto.Specific.solinas64_2e384m317_7limbs.Synthesis.
+
+(* TODO : change this to field once field isomorphism happens *)
+Definition carry :
+ { carry : feBW_loose -> feBW_tight
+ | forall a, phiBW_tight (carry a) = (phiBW_loose a) }.
+Proof.
+ Set Ltac Profiling.
+ Time synthesize_carry ().
+ Show Ltac Profile.
+Time Defined.
+
+Print Assumptions carry.