224 lines
9.1 KiB
Nim
224 lines
9.1 KiB
Nim
# Stint
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# Copyright 2018 Status Research & Development GmbH
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# Licensed under either of
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#
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
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#
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# at your option. This file may not be copied, modified, or distributed except according to those terms.
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import ../stint, unittest, test_helpers
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template chkNot(chk: untyped, a, b: distinct SomeInteger, bits: int) =
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chk stint(a, bits).not() == stint(b, bits)
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template chkNot(chk: untyped, a, b: string, bits: int) =
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chk fromHex(StInt[bits], a).not() == fromHex(StInt[bits], b)
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template chkOr(chk: untyped, a, b, c: string, bits: int) =
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chk (fromHex(StInt[bits], a) or fromHex(StInt[bits], b)) == fromHex(StInt[bits], c)
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template chkAnd(chk: untyped, a, b, c: string, bits: int) =
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chk (fromHex(StInt[bits], a) and fromHex(StInt[bits], b)) == fromHex(StInt[bits], c)
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template chkXor(chk: untyped, a, b, c: string, bits: int) =
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chk (fromHex(StInt[bits], a) xor fromHex(StInt[bits], b)) == fromHex(StInt[bits], c)
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template chkShl(chk: untyped, a: string, b: SomeInteger, c: string, bits: int) =
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chk (fromHex(StInt[bits], a) shl b) == fromHex(StInt[bits], c)
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template chkShr(chk: untyped, a: string, b: SomeInteger, c: string, bits: int) =
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chk (fromHex(StInt[bits], a) shr b) == fromHex(StInt[bits], c)
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template testBitwise(chk, tst: untyped) =
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# TODO: see issue #95
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#chkShl(chk, "0F", 128, "00", 128)
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#chkShl(chk, "0F", 256, "00", 256)
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#chkShr(chk, "F0000000000000000000000000000000", 128, "00", 128)
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tst "operator `not`":
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chkNot(chk, "0", "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 128)
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chkNot(chk, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", "0", 128)
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chkNot(chk, "F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0", "0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F0F", 128)
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chkNot(chk, "FFFFFFFFFFFF00000000000000000000", "000000000000FFFFFFFFFFFFFFFFFFFF", 128)
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tst "operator `or`":
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chkOr(chk, "00", "FF", "000000000000000000000000000000FF", 128)
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chkOr(chk, "FF", "00", "000000000000000000000000000000FF", 128)
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chkOr(chk, "F0", "0F", "000000000000000000000000000000FF", 128)
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chkOr(chk, "00", "00", "00000000000000000000000000000000", 128)
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chkOr(chk, "FF00", "0F00", "0000000000000000000000000000FF00", 128)
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chkOr(chk, "00FF00FF", "000F000F", "00000000000000000000000000FF00FF", 128)
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chkOr(chk, "00000000000000000000000000FF00FF", "FF0F0000000000000000000000FF00FF", "FF0F0000000000000000000000FF00FF", 128)
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tst "operator `and`":
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chkAnd(chk, "00", "FF", "00000000000000000000000000000000", 128)
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chkAnd(chk, "FF", "00", "00000000000000000000000000000000", 128)
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chkAnd(chk, "F0", "0F", "00000000000000000000000000000000", 128)
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chkAnd(chk, "00", "00", "00000000000000000000000000000000", 128)
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chkAnd(chk, "FF00", "0F00", "00000000000000000000000000000F00", 128)
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chkAnd(chk, "00FF00FF", "000F000F", "000000000000000000000000000F000F", 128)
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chkAnd(chk, "F0000000000000000000000000FF00FF", "FF0F0000000000000000000000FF00FF", "F0000000000000000000000000FF00FF", 128)
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tst "operator `xor`":
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chkXor(chk, "00", "FF", "000000000000000000000000000000FF", 128)
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chkXor(chk, "FF", "00", "000000000000000000000000000000FF", 128)
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chkXor(chk, "F0", "0F", "000000000000000000000000000000FF", 128)
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chkXor(chk, "00", "00", "00000000000000000000000000000000", 128)
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chkXor(chk, "FF00", "0F00", "0000000000000000000000000000F000", 128)
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chkXor(chk, "00FF00FF", "000F000F", "00000000000000000000000000F000F0", 128)
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chkXor(chk, "F0000000000000000000000000FF00FF", "FF0F0000000000000000000000FF00FF", "0F0F0000000000000000000000000000", 128)
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tst "operator `shl`":
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chkShl(chk, "0F", 4, "F0", 128)
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chkShl(chk, "F0", 4, "F00", 128)
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chkShl(chk, "F0", 3, "780", 128)
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chkShl(chk, "F000", 3, "78000", 128)
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chkShl(chk, "F0000000", 3, "780000000", 128)
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chkShl(chk, "F000000000000000", 3, "78000000000000000", 128)
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chkShl(chk, "F0000000000000000000000000000000", 3, "80000000000000000000000000000000", 128)
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chkShl(chk, "0F", 33, "1E00000000", 128)
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chkShl(chk, "0F", 65, "1E0000000000000000", 128)
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chkShl(chk, "0F", 97, "1E000000000000000000000000", 128)
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chkShl(chk, "0F", 127, "80000000000000000000000000000000", 128)
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chkShl(chk, "0F", 4, "F0", 256)
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chkShl(chk, "F0", 4, "F00", 256)
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chkShl(chk, "F0", 3, "780", 256)
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chkShl(chk, "F000", 3, "78000", 256)
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chkShl(chk, "F0000000", 3, "780000000", 256)
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chkShl(chk, "F000000000000000", 3, "78000000000000000", 256)
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chkShl(chk, "F0000000000000000000000000000000", 3, "780000000000000000000000000000000", 256)
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chkShl(chk, "0F", 33, "1E00000000", 256)
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chkShl(chk, "0F", 65, "1E0000000000000000", 256)
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chkShl(chk, "0F", 97, "1E000000000000000000000000", 256)
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chkShl(chk, "0F", 128, "0F00000000000000000000000000000000", 256)
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chkShl(chk, "0F", 129, "1E00000000000000000000000000000000", 256)
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chkShl(chk, "0F", 255, "8000000000000000000000000000000000000000000000000000000000000000", 256)
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tst "operator `shr`":
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chkShr(chk, "0F", 4, "00", 128)
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chkShr(chk, "F0", 4, "0F", 128)
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chkShr(chk, "F0", 3, "1E", 128)
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chkShr(chk, "F000", 3, "1E00", 128)
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chkShr(chk, "F0000000", 3, "1E000000", 128)
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chkShr(chk, "F000000000000000", 3, "1E00000000000000", 128)
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chkShr(chk, "F0000000000000000000000000000000", 127, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 128)
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chkShr(chk, "F0000000000000000000000000000000", 33, "FFFFFFFFF80000000000000000000000", 128)
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chkShr(chk, "F0000000000000000000000000000000", 65, "FFFFFFFFFFFFFFFFF800000000000000", 128)
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chkShr(chk, "F0000000000000000000000000000000", 97, "FFFFFFFFFFFFFFFFFFFFFFFFF8000000", 128)
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chkShr(chk, "0F", 4, "00", 256)
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chkShr(chk, "F0", 4, "0F", 256)
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chkShr(chk, "F0", 3, "1E", 256)
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chkShr(chk, "F000", 3, "1E00", 256)
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chkShr(chk, "F0000000", 3, "1E000000", 256)
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chkShr(chk, "F000000000000000", 3, "1E00000000000000", 256)
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chkShr(chk, "F000000000000000000000000000000000000000000000000000000000000000", 255, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 256)
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chkShr(chk, "F000000000000000000000000000000000000000000000000000000000000000", 33, "FFFFFFFFF8000000000000000000000000000000000000000000000000000000", 256)
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chkShr(chk, "F000000000000000000000000000000000000000000000000000000000000000", 65, "FFFFFFFFFFFFFFFFF80000000000000000000000000000000000000000000000", 256)
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chkShr(chk, "F000000000000000000000000000000000000000000000000000000000000000", 129, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF8000000000000000000000000000000", 256)
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chkShr(chk, "F000000000000000000000000000000000000000000000000000000000000000", 233, "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF80000", 256)
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static:
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testBitwise(ctCheck, ctTest)
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suite "Wider signed int bitwise coverage":
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testBitwise(check, test)
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when defined(cpp):
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import quicktest, ttmath_compat
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func high(T: typedesc[SomeUnsignedInt]): T =
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not T(0)
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suite "Testing signed int bitwise operations":
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test "Shift Left":
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var y = 1.u256
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for i in 1..255:
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let x = 1.i256 shl i
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y = y shl 1
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check cast[stint.UInt256](x) == y
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test "Shift Right on positive int":
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const leftMost = 1.i256 shl 254
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var y = 1.u256 shl 254
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for i in 1..255:
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let x = leftMost shr i
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y = y shr 1
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check x == cast[stint.Int256](y)
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test "Shift Right on negative int":
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const
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leftMostU = 1.u256 shl 255
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leftMostI = 1.i256 shl 255
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var y = leftMostU
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for i in 1..255:
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let x = leftMostI shr i
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y = (y shr 1) or leftMostU
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check x == cast[stint.Int256](y)
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test "Compile time shift":
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const
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# set all bits
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x = high(stint.Int256) or (1.i256 shl 255)
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y = not 0.i256
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check x == y
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const
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a = (high(stint.Int256) shl 10) shr 10
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b = (high(stint.UInt256) shl 10) shr 10
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c = (high(stint.Int256) shl 10) shr 10
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check a != cast[stint.Int256](b)
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check c != cast[stint.Int256](b)
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check c == a
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when defined(cpp):
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const
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hi = high(int64)
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lo = low(int64)
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itercount = 1000
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quicktest "signed int `shl` vs ttmath", itercount do(x0: int64(min=lo, max=hi),
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x1: int64(min=0, max=hi),
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x2: int64(min=0, max=hi),
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x3: int64(min=0, max=hi),
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y: int(min=0, max=(255))):
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let
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x = [x0, x1, x2, x3]
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ttm_x = x.asTT
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mp_x = cast[stint.Int256](x)
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let
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ttm_z = ttm_x shl y
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mp_z = mp_x shl y
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check ttm_z.asSt == mp_z
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quicktest "arithmetic shift right vs ttmath", itercount do(x0: int64(min=lo, max=hi),
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x1: int64(min=0, max=hi),
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x2: int64(min=0, max=hi),
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x3: int64(min=0, max=hi),
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y: int(min=0, max=(255))):
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let
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x = [x0, x1, x2, x3]
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ttm_x = x.asTT
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mp_x = cast[stint.Int256](x)
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let
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ttm_z = ttm_x shr y # C/CPP usually implement `shr` as `ashr` a.k.a. `sar`
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mp_z = mp_x shr y
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check ttm_z.asSt == mp_z
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