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feat(big): add SBigIsOdd

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Adam Heinermann 2024-11-15 08:31:27 -08:00 • committed by superp00t
parent 6759cb4d7c
commit 9074869097
5 changed files with 35 additions and 0 deletions
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4
storm/Big.cpp
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@ -73,6 +73,10 @@ int32_t SBigIsEven(BigData* a) {
return IsEven(a->Primary());
}
int32_t SBigIsOdd(BigData* a) {
return IsOdd(a->Primary());
}
void SBigMod(BigData* a, BigData* b, BigData* c) {
uint32_t allocCount = 0;
auto& scratch = a->Stack().Alloc(&allocCount);

2
storm/Big.hpp
View file

@ -30,6 +30,8 @@ void SBigInc(BigData* a, BigData* b);
int32_t SBigIsEven(BigData* a);
int32_t SBigIsOdd(BigData* a);
void SBigMod(BigData* a, BigData* b, BigData* c);
void SBigMul(BigData* a, BigData* b, BigData* c);

5
storm/big/Ops.cpp
View file

@ -215,6 +215,11 @@ int32_t IsEven(const BigBuffer &num) {
return num.Count() == 0 || (num[0] & 1) == 0;
}
int32_t IsOdd(const BigBuffer &num) {
num.Trim();
return num.Count() != 0 && (num[0] & 1) != 0;
}
uint64_t MakeLarge(uint32_t low, uint32_t high) {
return low + (static_cast<uint64_t>(high) << 32);
}

2
storm/big/Ops.hpp
View file

@ -35,6 +35,8 @@ void InsertLowPart(uint64_t& value, uint32_t low);
int32_t IsEven(const BigBuffer &num);
int32_t IsOdd(const BigBuffer &num);
uint64_t MakeLarge(uint32_t low, uint32_t high);
void Mul(BigBuffer& a, const BigBuffer& b, uint64_t c);