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|
discard """
nimout: "OK"
output: '''
OK
'''
"""
import bitops
proc main() =
const U8 = 0b0011_0010'u8
const I8 = 0b0011_0010'i8
const U16 = 0b00100111_00101000'u16
const I16 = 0b00100111_00101000'i16
const U32 = 0b11010101_10011100_11011010_01010000'u32
const I32 = 0b11010101_10011100_11011010_01010000'i32
const U64A = 0b01000100_00111111_01111100_10001010_10011001_01001000_01111010_00010001'u64
const I64A = 0b01000100_00111111_01111100_10001010_10011001_01001000_01111010_00010001'i64
const U64B = 0b00110010_11011101_10001111_00101000_00000000_00000000_00000000_00000000'u64
const I64B = 0b00110010_11011101_10001111_00101000_00000000_00000000_00000000_00000000'i64
const U64C = 0b00101010_11110101_10001111_00101000_00000100_00000000_00000100_00000000'u64
const I64C = 0b00101010_11110101_10001111_00101000_00000100_00000000_00000100_00000000'i64
doAssert (U8 and U8) == bitand(U8,U8)
doAssert (I8 and I8) == bitand(I8,I8)
doAssert (U16 and U16) == bitand(U16,U16)
doAssert (I16 and I16) == bitand(I16,I16)
doAssert (U32 and U32) == bitand(U32,U32)
doAssert (I32 and I32) == bitand(I32,I32)
doAssert (U64A and U64B) == bitand(U64A,U64B)
doAssert (I64A and I64B) == bitand(I64A,I64B)
doAssert (U64A and U64B and U64C) == bitand(U64A,U64B,U64C)
doAssert (I64A and I64B and I64C) == bitand(I64A,I64B,I64C)
doAssert (U8 or U8) == bitor(U8,U8)
doAssert (I8 or I8) == bitor(I8,I8)
doAssert (U16 or U16) == bitor(U16,U16)
doAssert (I16 or I16) == bitor(I16,I16)
doAssert (U32 or U32) == bitor(U32,U32)
doAssert (I32 or I32) == bitor(I32,I32)
doAssert (U64A or U64B) == bitor(U64A,U64B)
doAssert (I64A or I64B) == bitor(I64A,I64B)
doAssert (U64A or U64B or U64C) == bitor(U64A,U64B,U64C)
doAssert (I64A or I64B or I64C) == bitor(I64A,I64B,I64C)
doAssert (U8 xor U8) == bitxor(U8,U8)
doAssert (I8 xor I8) == bitxor(I8,I8)
doAssert (U16 xor U16) == bitxor(U16,U16)
doAssert (I16 xor I16) == bitxor(I16,I16)
doAssert (U32 xor U32) == bitxor(U32,U32)
doAssert (I32 xor I32) == bitxor(I32,I32)
doAssert (U64A xor U64B) == bitxor(U64A,U64B)
doAssert (I64A xor I64B) == bitxor(I64A,I64B)
doAssert (U64A xor U64B xor U64C) == bitxor(U64A,U64B,U64C)
doAssert (I64A xor I64B xor I64C) == bitxor(I64A,I64B,I64C)
doAssert not(U8) == bitnot(U8)
doAssert not(I8) == bitnot(I8)
doAssert not(U16) == bitnot(U16)
doAssert not(I16) == bitnot(I16)
doAssert not(U32) == bitnot(U32)
doAssert not(I32) == bitnot(I32)
doAssert not(U64A) == bitnot(U64A)
doAssert not(I64A) == bitnot(I64A)
doAssert U64A.fastLog2 == 62
doAssert I64A.fastLog2 == 62
doAssert U64A.countLeadingZeroBits == 1
doAssert I64A.countLeadingZeroBits == 1
doAssert U64A.countTrailingZeroBits == 0
doAssert I64A.countTrailingZeroBits == 0
doAssert U64A.firstSetBit == 1
doAssert I64A.firstSetBit == 1
doAssert U64A.parityBits == 1
doAssert I64A.parityBits == 1
doAssert U64A.countSetBits == 29
doAssert I64A.countSetBits == 29
doAssert U64A.rotateLeftBits(37) == 0b00101001_00001111_01000010_00101000_10000111_11101111_10010001_01010011'u64
doAssert U64A.rotateRightBits(37) == 0b01010100_11001010_01000011_11010000_10001010_00100001_11111011_11100100'u64
doAssert U64B.firstSetBit == 36
doAssert I64B.firstSetBit == 36
doAssert U32.fastLog2 == 31
doAssert I32.fastLog2 == 31
doAssert U32.countLeadingZeroBits == 0
doAssert I32.countLeadingZeroBits == 0
doAssert U32.countTrailingZeroBits == 4
doAssert I32.countTrailingZeroBits == 4
doAssert U32.firstSetBit == 5
doAssert I32.firstSetBit == 5
doAssert U32.parityBits == 0
doAssert I32.parityBits == 0
doAssert U32.countSetBits == 16
doAssert I32.countSetBits == 16
doAssert U32.rotateLeftBits(21) == 0b01001010_00011010_10110011_10011011'u32
doAssert U32.rotateRightBits(21) == 0b11100110_11010010_10000110_10101100'u32
doAssert U16.fastLog2 == 13
doAssert I16.fastLog2 == 13
doAssert U16.countLeadingZeroBits == 2
doAssert I16.countLeadingZeroBits == 2
doAssert U16.countTrailingZeroBits == 3
doAssert I16.countTrailingZeroBits == 3
doAssert U16.firstSetBit == 4
doAssert I16.firstSetBit == 4
doAssert U16.parityBits == 0
doAssert I16.parityBits == 0
doAssert U16.countSetBits == 6
doAssert I16.countSetBits == 6
doAssert U16.rotateLeftBits(12) == 0b10000010_01110010'u16
doAssert U16.rotateRightBits(12) == 0b01110010_10000010'u16
doAssert U8.fastLog2 == 5
doAssert I8.fastLog2 == 5
doAssert U8.countLeadingZeroBits == 2
doAssert I8.countLeadingZeroBits == 2
doAssert U8.countTrailingZeroBits == 1
doAssert I8.countTrailingZeroBits == 1
doAssert U8.firstSetBit == 2
doAssert I8.firstSetBit == 2
doAssert U8.parityBits == 1
doAssert I8.parityBits == 1
doAssert U8.countSetBits == 3
doAssert I8.countSetBits == 3
doAssert U8.rotateLeftBits(3) == 0b10010001'u8
doAssert U8.rotateRightBits(3) == 0b0100_0110'u8
template test_undefined_impl(ffunc: untyped; expected: int; is_static: bool) =
doAssert ffunc(0'u8) == expected
doAssert ffunc(0'i8) == expected
doAssert ffunc(0'u16) == expected
doAssert ffunc(0'i16) == expected
doAssert ffunc(0'u32) == expected
doAssert ffunc(0'i32) == expected
doAssert ffunc(0'u64) == expected
doAssert ffunc(0'i64) == expected
template test_undefined(ffunc: untyped; expected: int) =
test_undefined_impl(ffunc, expected, false)
static:
test_undefined_impl(ffunc, expected, true)
when defined(noUndefinedBitOpts):
# check for undefined behavior with zero.
test_undefined(countSetBits, 0)
test_undefined(parityBits, 0)
test_undefined(firstSetBit, 0)
test_undefined(countLeadingZeroBits, 0)
test_undefined(countTrailingZeroBits, 0)
test_undefined(fastLog2, -1)
# check for undefined behavior with rotate by zero.
doAssert U8.rotateLeftBits(0) == U8
doAssert U8.rotateRightBits(0) == U8
doAssert U16.rotateLeftBits(0) == U16
doAssert U16.rotateRightBits(0) == U16
doAssert U32.rotateLeftBits(0) == U32
doAssert U32.rotateRightBits(0) == U32
doAssert U64A.rotateLeftBits(0) == U64A
doAssert U64A.rotateRightBits(0) == U64A
# check for undefined behavior with rotate by integer width.
doAssert U8.rotateLeftBits(8) == U8
doAssert U8.rotateRightBits(8) == U8
doAssert U16.rotateLeftBits(16) == U16
doAssert U16.rotateRightBits(16) == U16
doAssert U32.rotateLeftBits(32) == U32
doAssert U32.rotateRightBits(32) == U32
doAssert U64A.rotateLeftBits(64) == U64A
doAssert U64A.rotateRightBits(64) == U64A
block:
# basic mask operations (mutating)
var v: uint8
v.setMask(0b1100_0000)
v.setMask(0b0000_1100)
doAssert v == 0b1100_1100
v.flipMask(0b0101_0101)
doAssert v == 0b1001_1001
v.clearMask(0b1000_1000)
doAssert v == 0b0001_0001
v.clearMask(0b0001_0001)
doAssert v == 0b0000_0000
v.setMask(0b0001_1110)
doAssert v == 0b0001_1110
v.mask(0b0101_0100)
doAssert v == 0b0001_0100
block:
# basic mask operations (non-mutating)
let v = 0b1100_0000'u8
doAssert v.masked(0b0000_1100) == 0b0000_0000
doAssert v.masked(0b1000_1100) == 0b1000_0000
doAssert v.setMasked(0b0000_1100) == 0b1100_1100
doAssert v.setMasked(0b1000_1110) == 0b1100_1110
doAssert v.flipMasked(0b1100_1000) == 0b0000_1000
doAssert v.flipMasked(0b0000_1100) == 0b1100_1100
let t = 0b1100_0110'u8
doAssert t.clearMasked(0b0100_1100) == 0b1000_0010
doAssert t.clearMasked(0b1100_0000) == 0b0000_0110
block:
# basic bitslice opeartions
let a = 0b1111_1011'u8
doAssert a.bitsliced(0 .. 3) == 0b1011
doAssert a.bitsliced(2 .. 3) == 0b10
doAssert a.bitsliced(4 .. 7) == 0b1111
# same thing, but with exclusive ranges.
doAssert a.bitsliced(0 ..< 4) == 0b1011
doAssert a.bitsliced(2 ..< 4) == 0b10
doAssert a.bitsliced(4 ..< 8) == 0b1111
# mutating
var b = 0b1111_1011'u8
b.bitslice(1 .. 3)
doAssert b == 0b101
# loop test:
let c = 0b1111_1111'u8
for i in 0 .. 7:
doAssert c.bitsliced(i .. 7) == c shr i
block:
# bitslice versions of mask operations (mutating)
var a = 0b1100_1100'u8
let b = toMask[uint8](2 .. 3)
a.mask(b)
doAssert a == 0b0000_1100
a.setMask(4 .. 7)
doAssert a == 0b1111_1100
a.flipMask(1 .. 3)
doAssert a == 0b1111_0010
a.flipMask(2 .. 4)
doAssert a == 0b1110_1110
a.clearMask(2 .. 4)
doAssert a == 0b1110_0010
a.mask(0 .. 3)
doAssert a == 0b0000_0010
# composition of mask from slices:
let c = bitor(toMask[uint8](2 .. 3), toMask[uint8](5 .. 7))
doAssert c == 0b1110_1100'u8
block:
# bitslice versions of mask operations (non-mutating)
let a = 0b1100_1100'u8
doAssert a.masked(toMask[uint8](2 .. 3)) == 0b0000_1100
doAssert a.masked(2 .. 3) == 0b0000_1100
doAssert a.setMasked(0 .. 3) == 0b1100_1111
doAssert a.setMasked(3 .. 4) == 0b1101_1100
doAssert a.flipMasked(0 .. 3) == 0b1100_0011
doAssert a.flipMasked(0 .. 7) == 0b0011_0011
doAssert a.flipMasked(2 .. 3) == 0b1100_0000
doAssert a.clearMasked(2 .. 3) == 0b1100_0000
doAssert a.clearMasked(3 .. 6) == 0b1000_0100
block:
# single bit operations
var v: uint8
v.setBit(0)
doAssert v == 0x0000_0001
v.setBit(1)
doAssert v == 0b0000_0011
v.flipBit(7)
doAssert v == 0b1000_0011
v.clearBit(0)
doAssert v == 0b1000_0010
v.flipBit(1)
doAssert v == 0b1000_0000
doAssert v.testbit(7)
doAssert not v.testbit(6)
block:
# multi bit operations
var v: uint8
v.setBits(0, 1, 7)
doAssert v == 0b1000_0011
v.flipBits(2, 3)
doAssert v == 0b1000_1111
v.clearBits(7, 0, 1)
doAssert v == 0b0000_1100
block:
# signed
var v: int8
v.setBit(7)
doAssert v == -128
block:
var v: uint64
v.setBit(63)
doAssert v == 0b1000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000'u64
block:
proc testReverseBitsInvo(x: SomeUnsignedInt) =
doAssert reverseBits(reverseBits(x)) == x
proc testReverseBitsPerType(x, reversed: uint64) =
doAssert reverseBits(x) == reversed
doAssert reverseBits(cast[uint32](x)) == cast[uint32](reversed shr 32)
doAssert reverseBits(cast[uint32](x shr 16)) == cast[uint32](reversed shr 16)
doAssert reverseBits(cast[uint16](x)) == cast[uint16](reversed shr 48)
doAssert reverseBits(cast[uint8](x)) == cast[uint8](reversed shr 56)
testReverseBitsInvo(x)
testReverseBitsInvo(cast[uint32](x))
testReverseBitsInvo(cast[uint16](x))
testReverseBitsInvo(cast[uint8](x))
proc testReverseBitsRefl(x, reversed: uint64) =
testReverseBitsPerType(x, reversed)
testReverseBitsPerType(reversed, x)
proc testReverseBitsShift(d, b: uint64) =
var
x = d
y = b
for i in 1..64:
testReverseBitsRefl(x, y)
x = x shl 1
y = y shr 1
proc testReverseBits(d, b: uint64) =
testReverseBitsShift(d, b)
testReverseBits(0x0u64, 0x0u64)
testReverseBits(0xffffffffffffffffu64, 0xffffffffffffffffu64)
testReverseBits(0x0123456789abcdefu64, 0xf7b3d591e6a2c480u64)
testReverseBits(0x5555555555555555u64, 0xaaaaaaaaaaaaaaaau64)
testReverseBits(0x5555555500000001u64, 0x80000000aaaaaaaau64)
testReverseBits(0x55555555aaaaaaaau64, 0x55555555aaaaaaaau64)
testReverseBits(0xf0f0f0f00f0f0f0fu64, 0xf0f0f0f00f0f0f0fu64)
testReverseBits(0x181881810ff00916u64, 0x68900ff081811818u64)
echo "OK"
# bug #7587
doAssert popcount(0b11111111'i8) == 8
block: # not ready for vm because exception is compile error
try:
var v: uint32
var i = 32
v.setBit(i)
doAssert false
except RangeDefect:
discard
except:
doAssert false
main()
static:
# test everything on vm as well
main()
|