#===-----------------------------------------------------------------------===//
#
# This source file is part of the Swift.org open source project
#
# Copyright (c) 2020 - 2023 Apple Inc. and the Swift project authors
# Licensed under Apache License v2.0 with Runtime Library Exception
#
# See https://swift.org/LICENSE.txt for license information
# See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
#
#===-----------------------------------------------------------------------===//

def autogenerated_warning():
  return """
// #############################################################################
// #                                                                           #
// #            DO NOT EDIT THIS FILE; IT IS AUTOGENERATED.                    #
// #                                                                           #
// #############################################################################
"""

cPrimitives = [
  #Storage                      Value
  ("_AtomicInt8Storage",        "Int8"),
  ("_AtomicInt16Storage",       "Int16"),
  ("_AtomicInt32Storage",       "Int32"),
  ("_AtomicInt64Storage",       "Int64"),
  ("_AtomicIntStorage",         "Int"),
  ("_AtomicDoubleWordStorage",  "DoubleWord"),
]

nativePrimitives = [
  #Storage                  Builtin    Alignment
  ("_AtomicInt8Storage",    "Int8",    "1"),
  ("_AtomicInt16Storage",   "Int16",   "2"),
  ("_AtomicInt32Storage",   "Int32",   "4"),
  ("_AtomicInt64Storage",   "Int64",   "8"),
  ("_AtomicInt128Storage",  "Int128",  "16"),
]

loadOrderings = [
  # Swift enum case,         API name,                 doc name,                  llvm name
  ('relaxed',                'Relaxed',                'relaxed',                 'monotonic'),
  ('acquiring',              'Acquiring',              'acquiring',               'acquire'),
  ('sequentiallyConsistent', 'SequentiallyConsistent', 'sequentially consistent', 'seqcst'),
]

storeOrderings = [
  # Swift enum case,         API name,                 doc name,                  llvm name
  ('relaxed',                'Relaxed',                'relaxed',                 'monotonic'),
  ('releasing',              'Releasing',              'releasing',               'release'),
  ('sequentiallyConsistent', 'SequentiallyConsistent', 'sequentially consistent', 'seqcst'),
]

updateOrderings = [
  # Swift enum case,         API name,                 documentation name,        llvm name,   failure name
  ('relaxed',                'Relaxed',                'relaxed',                 'monotonic', 'monotonic'),
  ('acquiring',              'Acquiring',              'acquiring',               'acquire',   'acquire'),
  ('releasing',              'Releasing',              'releasing',               'release',   'monotonic'),
  ('acquiringAndReleasing',  'AcquiringAndReleasing',  'acquiring-and-releasing', 'acqrel',    'acquire'),
  ('sequentiallyConsistent', 'SequentiallyConsistent', 'sequentially consistent', 'seqcst',    'seqcst'),
]

def shim_name(llvmOrdering):
  if llvmOrdering == 'monotonic':
    return "relaxed"
  if llvmOrdering == 'acquire':
    return "acquire"
  if llvmOrdering == 'release':
    return "release"
  if llvmOrdering == 'acqrel':
    return "acq_rel"
  if llvmOrdering == 'seqcst':
    return "seq_cst"
  raise ValueError("Unknown ordering " + llvmOrdering)

def isStrongerThan(rmw, load): # See llvm/Support/AtomicOrdering.h
  if rmw == "sequentiallyConsistent":
    return load == "relaxed" or load == "acquiring"
  if rmw == "acquiringAndReleasing":
    return load == "relaxed"
  if rmw == "releasing":
    return False
  if rmw == "acquiring":
    return load == "relaxed"
  if rmw == "relaxed":
    return False

def failureOrderingOf(update):
  if update == "release":
    return "monotonic"
  if update == "acqrel":
    return "acquire"
  return update

# LLVM doesn't support arbitrary ordering combinations yet, so for the
# two-ordering cmpxchg variants we need to upgrade the success
# ordering when necessary so that it is at least as "strong" as the
# failure case. This function implements that mapping.
#
# See llvm/Support/AtomicOrdering.h
def actualOrders(success, failure):
  def max(success, failure):
    if failure == "acquire":
      if success == "monotonic":
        return "acquire"
      if success == "release":
        return "acqrel"
    if failure == "seqcst":
      return "seqcst"
    return success
  actualSuccess = max(success, failure)
  return actualSuccess + "_" + failure

def actualShimOrders(success, failure):
  r=actualOrders(success, failure).split("_")
  return shim_name(r[0]) + "_" + shim_name(r[1])

integerOperations = [
  # Swift name,         llvm name,  operator, label,  doc
  ('WrappingIncrement', 'add',      '&+',     "by",   "wrapping add"),
  ('WrappingDecrement', 'sub',      '&-',     "by",   "wrapping subtract"),
  ('BitwiseAnd',        'and',      '&',      "with", "bitwise AND"),
  ('BitwiseOr',         'or',       '|',      "with", "bitwise OR"),
  ('BitwiseXor',        'xor',      '^',      "with", "bitwise XOR")
]

boolOperations = [
  # Swift name,         Int8 name,    operator, label,  doc
  ('LogicalAnd',        'BitwiseAnd', '&&',     "with", "logical AND"),
  ('LogicalOr',         'BitwiseOr',  '||',     "with", "logical OR"),
  ('LogicalXor',        'BitwiseXor', '!=',     "with", "logical XOR")
]

def lowerFirst(str):
  return str[:1].lower() + str[1:] if str else ""

def argLabel(label):
  return label + ": " if label != "_" else ""

ptrBitWidth32 = "(compiler(>=5.9) && _pointerBitWidth(_32)) || (compiler(<5.9) && (arch(i386) || arch(arm) || arch(arm64_32) || arch(wasm32)))"