val of_arg (i: IX64.reg_nat 3) : MS.reg_64
let of_arg (i:IX64.reg_nat 3) : MS.reg_64 = match i with
  | 0 -> MS.rRdi
  | 1 -> MS.rRsi
  | 2 -> MS.rRdx
val of_arg (i: IX64.reg_nat 3) : MS.reg_64
let of_arg (i: IX64.reg_nat 3) : MS.reg_64 =
match i with
| 0 -> MS.rRdi
| 1 -> MS.rRsi
| 2 -> MS.rRdx
Vale.Inline.X64.Fswap_inline.fst.checked
Vale.X64.State.fsti.checked Vale.X64.Print_Inline_s.fst.checked Vale.X64.MemoryAdapters.fsti.checked Vale.X64.Memory.fsti.checked Vale.X64.Machine_s.fst.checked Vale.X64.Decls.fsti.checked Vale.Interop.X64.fsti.checked Vale.Interop.Base.fst.checked Vale.Interop.Assumptions.fst.checked Vale.Def.Types_s.fst.checked Vale.Curve25519.X64.FastUtil.fsti.checked Vale.AsLowStar.Wrapper.fsti.checked Vale.AsLowStar.ValeSig.fst.checked Vale.AsLowStar.MemoryHelpers.fsti.checked Vale.AsLowStar.LowStarSig.fst.checked prims.fst.checked LowStar.BufferView.Down.fsti.checked LowStar.Buffer.fst.checked FStar.UInt64.fsti.checked FStar.Pervasives.Native.fst.checked FStar.Pervasives.fsti.checked FStar.Mul.fst.checked FStar.List.fst.checked FStar.HyperStack.ST.fsti.checked FStar.HyperStack.fst.checked FStar.All.fst.checked
Vale.Inline.X64.Fswap_inline.fst
Vale.Interop.X64.reg_nat Vale.X64.Machine_s.rRdi Vale.X64.Machine_s.rRsi Vale.X64.Machine_s.rRdx Vale.X64.Machine_s.reg_64
module Vale.Inline.X64.Fswap_inline

open FStar.Mul
open FStar.HyperStack.ST
module HS = FStar.HyperStack
module B = LowStar.Buffer
module DV = LowStar.BufferView.Down
open Vale.Def.Types_s

open Vale.Interop.Base
module IX64 = Vale.Interop.X64
module VSig = Vale.AsLowStar.ValeSig
module LSig = Vale.AsLowStar.LowStarSig
module ME = Vale.X64.Memory
module V = Vale.X64.Decls
module IA = Vale.Interop.Assumptions
module W = Vale.AsLowStar.Wrapper
open Vale.X64.MemoryAdapters
module VS = Vale.X64.State
module MS = Vale.X64.Machine_s
module PR = Vale.X64.Print_Inline_s

module FU = Vale.Curve25519.X64.FastUtil

let uint64 = UInt64.t

(* A little utility to trigger normalization in types *)
let as_t (#a:Type) (x:normal a) : a = x
let as_normal_t (#a:Type) (x:a) : normal a = x

[@__reduce__]
let b64 = buf_t TUInt64 TUInt64
[@__reduce__]
let t64_mod = TD_Buffer TUInt64 TUInt64 default_bq
[@__reduce__]
let t64_no_mod = TD_Buffer TUInt64 TUInt64 ({modified=false; strict_disjointness=false; taint=MS.Secret})
[@__reduce__]
let tuint64 = TD_Base TUInt64

[@__reduce__]
let cswap_dom: IX64.arity_ok 3 td =
  let y = [tuint64; t64_mod; t64_mod] in
  assert_norm (List.length y = 3);
  y

(* Need to rearrange the order of arguments *)
[@__reduce__]
let cswap_pre : VSig.vale_pre cswap_dom =
  fun (c:V.va_code)
    (bit:uint64)
    (p0:b64)
    (p1:b64)
    (va_s0:V.va_state) ->
      FU.va_req_Cswap2 c va_s0
        (UInt64.v bit) (as_vale_buffer p0) (as_vale_buffer p1)

[@__reduce__]
let cswap_post : VSig.vale_post cswap_dom =
  fun (c:V.va_code)
    (bit:uint64)
    (p0:b64)
    (p1:b64)
    (va_s0:V.va_state)
    (va_s1:V.va_state)
    (f:V.va_fuel) ->
      FU.va_ens_Cswap2 c va_s0 (UInt64.v bit) (as_vale_buffer p0) (as_vale_buffer p1) va_s1 f

#set-options "--z3rlimit 50"

let cswap_regs_modified: MS.reg_64 -> bool = fun (r:MS.reg_64) ->
  let open MS in
  if r = rRdi || r = rR8 || r = rR9 || r = rR10 then true
  else false

let cswap_xmms_modified = fun _ -> false

[@__reduce__]
let cswap_lemma'
    (code:V.va_code)
    (_win:bool)
    (bit:uint64)
    (p0:b64)
    (p1:b64)
    (va_s0:V.va_state)
 : Ghost (V.va_state & V.va_fuel)
     (requires
       cswap_pre code bit p0 p1 va_s0)
     (ensures (fun (va_s1, f) ->
       V.eval_code code va_s0 f va_s1 /\
       VSig.vale_calling_conventions va_s0 va_s1 cswap_regs_modified cswap_xmms_modified /\
       cswap_post code bit p0 p1 va_s0 va_s1 f /\
       ME.buffer_readable (VS.vs_get_vale_heap va_s1) (as_vale_buffer p0) /\
       ME.buffer_readable (VS.vs_get_vale_heap va_s1) (as_vale_buffer p1) /\
       ME.buffer_writeable (as_vale_buffer p0) /\
       ME.buffer_writeable (as_vale_buffer p1) /\
       ME.modifies (ME.loc_union (ME.loc_buffer (as_vale_buffer p0))
                   (ME.loc_union (ME.loc_buffer (as_vale_buffer p1))
                                 ME.loc_none)) (VS.vs_get_vale_heap va_s0) (VS.vs_get_vale_heap va_s1)
 )) =
   let va_s1, f = FU.va_lemma_Cswap2 code va_s0 (UInt64.v bit) (as_vale_buffer p0) (as_vale_buffer p1) in
   Vale.AsLowStar.MemoryHelpers.buffer_writeable_reveal ME.TUInt64 ME.TUInt64 p0;
   Vale.AsLowStar.MemoryHelpers.buffer_writeable_reveal ME.TUInt64 ME.TUInt64 p1;
   (va_s1, f)

(* Prove that cswap_lemma' has the required type *)
let cswap_lemma = as_t #(VSig.vale_sig cswap_regs_modified cswap_xmms_modified cswap_pre cswap_post) cswap_lemma'

let code_cswap = FU.va_code_Cswap2 ()

let of_reg (r:MS.reg_64) : option (IX64.reg_nat 3) = match r with
  | 5 -> Some 0 // rdi
  | 4 -> Some 1 // rsi
  | 3 -> Some 2 // rdx
  | _ -> None
val of_arg (i: IX64.reg_nat 3) : MS.reg_64
i: Vale.Interop.X64.reg_nat 3 -> Vale.X64.Machine_s.reg_64