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Fix borrow border case: see https://github.com/status-im/mpint/issues/10

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mratsim 2018-03-30 14:25:04 +02:00
parent 6c21b54a87
commit 55dd38c67c
1 changed files with 1 additions and 1 deletions
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src/private/uint_binary_ops.nim
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@ -36,7 +36,7 @@ proc `-=`*(x: var MpUintImpl, y: MpUintImpl) {.noSideEffect, inline.}=
# Clang on MacOS does with the -d:release switch and MpUint[uint32] (uint64)
type SubTy = type x.lo
x.lo -= y.lo
x.hi -= (x.lo < not y.lo).toSubtype(SubTy) + y.hi
x.hi -= (x.lo <= not y.lo).toSubtype(SubTy) + y.hi
proc `-`*(x, y: MpUintImpl): MpUintImpl {.noSideEffect, noInit, inline.}=
# Substraction for multi-precision unsigned int