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fixed shr documentation

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add docs on shr filling with zeros
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Magnus Jöud 2015-10-25 22:28:18 +01:00
commit f68330e672
1 changed files with 5 additions and 4 deletions
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lib/system.nim
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@ -868,12 +868,13 @@ proc `shr` *(x, y: int8): int8 {.magic: "ShrI", noSideEffect.}
proc `shr` *(x, y: int16): int16 {.magic: "ShrI", noSideEffect.} proc `shr` *(x, y: int16): int16 {.magic: "ShrI", noSideEffect.}
proc `shr` *(x, y: int32): int32 {.magic: "ShrI", noSideEffect.} proc `shr` *(x, y: int32): int32 {.magic: "ShrI", noSideEffect.}
proc `shr` *(x, y: int64): int64 {.magic: "ShrI", noSideEffect.} proc `shr` *(x, y: int64): int64 {.magic: "ShrI", noSideEffect.}
## computes the `shift right` operation of `x` and `y`. ## computes the `shift right` operation of `x` and `y`, filling
## vacant bit positions with zeros.
## ##
## .. code-block:: Nim ## .. code-block:: Nim
## 0b0001_0000'i8 shr 2 == 0b0100_0000'i8 ## 0b0001_0000'i8 shr 2 == 0b0000_0100'i8
## 0b1000_0000'i8 shr 2 == 0b0000_0000'i8 ## 0b1000_0000'i8 shr 8 == 0b0000_0000'i8
## 0b0000_0001'i8 shr 9 == 0b0000_0000'i8 ## 0b0000_0001'i8 shr 1 == 0b0000_0000'i8
proc `shl` *(x, y: int): int {.magic: "ShlI", noSideEffect.} proc `shl` *(x, y: int): int {.magic: "ShlI", noSideEffect.}
proc `shl` *(x, y: int8): int8 {.magic: "ShlI", noSideEffect.} proc `shl` *(x, y: int8): int8 {.magic: "ShlI", noSideEffect.}