diff options
Diffstat (limited to 'compiler/int128.nim')
| -rw-r--r-- | compiler/int128.nim | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/compiler/int128.nim b/compiler/int128.nim index 6968b1f89..74e581cd5 100644 --- a/compiler/int128.nim +++ b/compiler/int128.nim @@ -3,7 +3,7 @@ ## hold all from `low(BiggestInt)` to `high(BiggestUInt)`, This ## type is for that purpose. -from math import trunc +from std/math import trunc when defined(nimPreviewSlimSystem): import std/assertions @@ -34,6 +34,7 @@ proc `$`*(a: Int128): string proc toInt128*[T: SomeInteger | bool](arg: T): Int128 = {.noSideEffect.}: + result = Zero when T is bool: result.sdata(0) = int32(arg) elif T is SomeUnsignedInt: when sizeof(arg) <= 4: @@ -208,30 +209,35 @@ proc `==`*(a, b: Int128): bool = return true proc bitnot*(a: Int128): Int128 = + result = Zero result.udata[0] = not a.udata[0] result.udata[1] = not a.udata[1] result.udata[2] = not a.udata[2] result.udata[3] = not a.udata[3] proc bitand*(a, b: Int128): Int128 = + result = Zero result.udata[0] = a.udata[0] and b.udata[0] result.udata[1] = a.udata[1] and b.udata[1] result.udata[2] = a.udata[2] and b.udata[2] result.udata[3] = a.udata[3] and b.udata[3] proc bitor*(a, b: Int128): Int128 = + result = Zero result.udata[0] = a.udata[0] or b.udata[0] result.udata[1] = a.udata[1] or b.udata[1] result.udata[2] = a.udata[2] or b.udata[2] result.udata[3] = a.udata[3] or b.udata[3] proc bitxor*(a, b: Int128): Int128 = + result = Zero result.udata[0] = a.udata[0] xor b.udata[0] result.udata[1] = a.udata[1] xor b.udata[1] result.udata[2] = a.udata[2] xor b.udata[2] result.udata[3] = a.udata[3] xor b.udata[3] proc `shr`*(a: Int128, b: int): Int128 = + result = Zero let b = b and 127 if b < 32: result.sdata(3) = a.sdata(3) shr b @@ -258,6 +264,7 @@ proc `shr`*(a: Int128, b: int): Int128 = result.sdata(0) = a.sdata(3) shr (b and 31) proc `shl`*(a: Int128, b: int): Int128 = + result = Zero let b = b and 127 if b < 32: result.udata[0] = a.udata[0] shl b @@ -281,6 +288,7 @@ proc `shl`*(a: Int128, b: int): Int128 = result.udata[3] = a.udata[0] shl (b and 31) proc `+`*(a, b: Int128): Int128 = + result = Zero let tmp0 = uint64(a.udata[0]) + uint64(b.udata[0]) result.udata[0] = cast[uint32](tmp0) let tmp1 = uint64(a.udata[1]) + uint64(b.udata[1]) + (tmp0 shr 32) @@ -313,6 +321,7 @@ proc abs(a: int32): int = if a < 0: -a else: a proc `*`(a: Int128, b: uint32): Int128 = + result = Zero let tmp0 = uint64(a.udata[0]) * uint64(b) let tmp1 = uint64(a.udata[1]) * uint64(b) let tmp2 = uint64(a.udata[2]) * uint64(b) @@ -335,6 +344,7 @@ proc `*=`(a: var Int128, b: int32) = a = a * b proc makeInt128(high, low: uint64): Int128 = + result = Zero result.udata[0] = cast[uint32](low) result.udata[1] = cast[uint32](low shr 32) result.udata[2] = cast[uint32](high) @@ -358,7 +368,7 @@ proc `*`*(lhs, rhs: Int128): Int128 = proc `*=`*(a: var Int128, b: Int128) = a = a * b -import bitops +import std/bitops proc fastLog2*(a: Int128): int = result = 0 @@ -373,6 +383,8 @@ proc fastLog2*(a: Int128): int = proc divMod*(dividend, divisor: Int128): tuple[quotient, remainder: Int128] = assert(divisor != Zero) + result = (Zero, Zero) + let isNegativeA = isNegative(dividend) let isNegativeB = isNegative(divisor) @@ -539,24 +551,28 @@ proc toInt128*(arg: float64): Int128 = return res proc maskUInt64*(arg: Int128): Int128 {.noinit, inline.} = + result = Zero result.udata[0] = arg.udata[0] result.udata[1] = arg.udata[1] result.udata[2] = 0 result.udata[3] = 0 proc maskUInt32*(arg: Int128): Int128 {.noinit, inline.} = + result = Zero result.udata[0] = arg.udata[0] result.udata[1] = 0 result.udata[2] = 0 result.udata[3] = 0 proc maskUInt16*(arg: Int128): Int128 {.noinit, inline.} = + result = Zero result.udata[0] = arg.udata[0] and 0xffff result.udata[1] = 0 result.udata[2] = 0 result.udata[3] = 0 proc maskUInt8*(arg: Int128): Int128 {.noinit, inline.} = + result = Zero result.udata[0] = arg.udata[0] and 0xff result.udata[1] = 0 result.udata[2] = 0 @@ -573,4 +589,4 @@ proc maskBytes*(arg: Int128, numbytes: int): Int128 {.noinit.} = of 8: return maskUInt64(arg) else: - assert(false, "masking only implemented for 1, 2, 4 and 8 bytes") + raiseAssert "masking only implemented for 1, 2, 4 and 8 bytes" |