mirrors/Nim
1
0
Fork 0
mirror of https://github.com/nim-lang/Nim.git synced 2026-02-12 06:18:51 +00:00
Code Issues Packages Projects Releases Wiki Activity

Bit operator names 2 (#11413)

Browse Source 
* add bit operator names

* add test for bitop alias
This commit is contained in:
Arne Döring
2019-06-06 08:36:20 +02:00
committed by Andreas Rumpf
parent 4296bddccb
commit cfeb9d2c50
2 changed files with 48 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
lib/pure/bitops.nim
View File

@@ -25,6 +25,17 @@
## At this time only `fastLog2`, `firstSetBit, `countLeadingZeroBits`, `countTrailingZeroBits`
## may return undefined and/or platform dependant value if given invalid input.
proc bitnot*[T: SomeInteger](x: T): T {.magic: "BitnotI", noSideEffect.}
## Computes the `bitwise complement` of the integer `x`.
proc bitand*[T: SomeInteger](x, y: T): T {.magic: "BitandI", noSideEffect.}
## Computes the `bitwise and` of numbers `x` and `y`.
proc bitor*[T: SomeInteger](x, y: T): T {.magic: "BitorI", noSideEffect.}
## Computes the `bitwise or` of numbers `x` and `y`.
proc bitxor*[T: SomeInteger](x, y: T): T {.magic: "BitxorI", noSideEffect.}
## Computes the `bitwise xor` of numbers `x` and `y`.
const useBuiltins = not defined(noIntrinsicsBitOpts)
const noUndefined = defined(noUndefinedBitOpts)

38
tests/stdlib/tbitops.nim
View File

@@ -16,6 +16,42 @@ proc main() =
const U64B = 0b00110010_11011101_10001111_00101000_00000000_00000000_00000000_00000000'u64
const I64B = 0b00110010_11011101_10001111_00101000_00000000_00000000_00000000_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( (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( (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( 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)
@@ -172,7 +208,7 @@ proc main() =
block:
proc testReverseBitsInvo(x: SomeUnsignedInt) =
doAssert(reverseBits(reverseBits(x)) == x)
proc testReverseBitsPerType(x, reversed: uint64) =
doAssert reverseBits(x) == reversed
doAssert reverseBits(uint32(x)) == uint32(reversed shr 32)