tests/corelib/bigint_sra_test.dart

// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// Testing Bigints with and without intrinsics.
// VMOptions=--intrinsify --no-enable-asserts
// VMOptions=--intrinsify --enable-asserts
// VMOptions=--no-intrinsify --enable-asserts
// VMOptions=--no-intrinsify --no-enable-asserts
// VMOptions=--runtime_allocate_old
// VMOptions=--runtime_allocate_spill_tlab

import "package:expect/expect.dart";

expectShifted(aString, n, expectedString) {
  BigInt a = BigInt.parse(aString, radix: 16);
  BigInt expected = BigInt.parse(expectedString, radix: 16);
  BigInt actual = a >> n;
  String actualString = actual.toRadixString(16);
  print("$aString >> $n");
  print(" = $actualString (expected $expectedString)");
  Expect.equals(expected, actual);
}

main() {
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    0,
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    1,
    "6c3df6551b80e4bd98dadc042795ad9a73c2b849",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    2,
    "361efb2a8dc0725ecc6d6e0213cad6cd39e15c24",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    31,
    "1b0f7d9546e0392f6636b70109e56b669",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    32,
    "d87becaa3701c97b31b5b8084f2b5b34",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    33,
    "6c3df6551b80e4bd98dadc042795ad9a",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    63,
    "1b0f7d9546e0392f6636b7010",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    64,
    "d87becaa3701c97b31b5b808",
  );
  expectShifted(
    "d87becaa3701c97b31b5b8084f2b5b34e7857092",
    65,
    "6c3df6551b80e4bd98dadc04",
  );
  expectShifted("d87becaa3701c97b31b5b8084f2b5b34e7857092", 127, "1b0f7d954");
  expectShifted("d87becaa3701c97b31b5b8084f2b5b34e7857092", 128, "d87becaa");
  expectShifted("d87becaa3701c97b31b5b8084f2b5b34e7857092", 129, "6c3df655");

  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    0,
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    1,
    "-6c3df6551b80e4bd98dadc042795ad9a73c2b849",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    2,
    "-361efb2a8dc0725ecc6d6e0213cad6cd39e15c25",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    31,
    "-1b0f7d9546e0392f6636b70109e56b66a",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    32,
    "-d87becaa3701c97b31b5b8084f2b5b35",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    33,
    "-6c3df6551b80e4bd98dadc042795ad9b",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    63,
    "-1b0f7d9546e0392f6636b7011",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    64,
    "-d87becaa3701c97b31b5b809",
  );
  expectShifted(
    "-d87becaa3701c97b31b5b8084f2b5b34e7857092",
    65,
    "-6c3df6551b80e4bd98dadc05",
  );
  expectShifted("-d87becaa3701c97b31b5b8084f2b5b34e7857092", 127, "-1b0f7d955");
  expectShifted("-d87becaa3701c97b31b5b8084f2b5b34e7857092", 128, "-d87becab");
  expectShifted("-d87becaa3701c97b31b5b8084f2b5b34e7857092", 129, "-6c3df656");
}