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fixes #21393 and misc style changes (#21419)

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* fixes #21393 and misc style changes

* progress

---------

Co-authored-by: ringabout <43030857+ringabout@users.noreply.github.com>
This commit is contained in:
Andreas Rumpf 2023-02-24 09:02:15 +01:00 • committed by GitHub
commit 8a19ac2070
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11 changed files with 70 additions and 61 deletions
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39
compiler/int128.nim
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@ -33,26 +33,27 @@ template high*(t: typedesc[Int128]): Int128 = Max
proc `$`*(a: Int128): string
proc toInt128*[T: SomeInteger | bool](arg: T): Int128 =
when T is bool: result.sdata(0) = int32(arg)
elif T is SomeUnsignedInt:
when sizeof(arg) <= 4:
result.udata[0] = uint32(arg)
{.noSideEffect.}:
when T is bool: result.sdata(0) = int32(arg)
elif T is SomeUnsignedInt:
when sizeof(arg) <= 4:
result.udata[0] = uint32(arg)
else:
result.udata[0] = uint32(arg and T(0xffffffff))
result.udata[1] = uint32(arg shr 32)
elif sizeof(arg) <= 4:
result.sdata(0) = int32(arg)
if arg < 0: # sign extend
result.sdata(1) = -1
result.sdata(2) = -1
result.sdata(3) = -1
else:
result.udata[0] = uint32(arg and T(0xffffffff))
result.udata[1] = uint32(arg shr 32)
elif sizeof(arg) <= 4:
result.sdata(0) = int32(arg)
if arg < 0: # sign extend
result.sdata(1) = -1
result.sdata(2) = -1
result.sdata(3) = -1
else:
let tmp = int64(arg)
result.udata[0] = uint32(tmp and 0xffffffff)
result.sdata(1) = int32(tmp shr 32)
if arg < 0: # sign extend
result.sdata(2) = -1
result.sdata(3) = -1
let tmp = int64(arg)
result.udata[0] = uint32(tmp and 0xffffffff)
result.sdata(1) = int32(tmp shr 32)
if arg < 0: # sign extend
result.sdata(2) = -1
result.sdata(3) = -1
template isNegative(arg: Int128): bool =
arg.sdata(3) < 0