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#include "mkql_builtins_decimal.h"
#include <cmath>
namespace NKikimr {
namespace NMiniKQL {
namespace {
template <typename T, std::enable_if_t<std::is_unsigned<T>::value>* = nullptr>
inline T Abs(T v) {
return v;
}
template <typename T, std::enable_if_t<std::is_floating_point<T>::value>* = nullptr>
inline T Abs(T v) {
return std::fabs(v);
}
template <typename T, std::enable_if_t<std::is_signed<T>::value && std::is_integral<T>::value>* = nullptr>
inline T Abs(T v) {
return std::abs(v);
}
template<typename TInput, typename TOutput>
struct TAbs : public TSimpleArithmeticUnary<TInput, TOutput, TAbs<TInput, TOutput>> {
static TOutput Do(TInput val)
{
return Abs<TInput>(val);
}
#ifndef MKQL_DISABLE_CODEGEN
static Value* Gen(Value* arg, const TCodegenContext& ctx, BasicBlock*& block)
{
if (std::is_unsigned<TInput>())
return arg;
if (std::is_floating_point<TInput>()) {
auto& module = ctx.Codegen->GetModule();
const auto fnType = FunctionType::get(arg->getType(), {arg->getType()}, false);
const auto& name = GetFuncNameForType<TInput>("llvm.fabs");
const auto func = module.getOrInsertFunction(name, fnType).getCallee();
const auto res = CallInst::Create(func, {arg}, "fabs", block);
return res;
} else {
const auto zero = ConstantInt::get(arg->getType(), 0);
const auto check = CmpInst::Create(Instruction::ICmp, ICmpInst::ICMP_SLT, arg, zero, "check", block);
const auto neg = BinaryOperator::CreateNeg(arg, "neg", block);
const auto res = SelectInst::Create(check, neg, arg, "result", block);
return res;
}
}
#endif
};
struct TDecimalAbs {
static NUdf::TUnboxedValuePod Execute(const NUdf::TUnboxedValuePod& arg) {
const auto a = arg.GetInt128();
return a < 0 ? NUdf::TUnboxedValuePod(-a) : arg;
}
#ifndef MKQL_DISABLE_CODEGEN
static Value* Generate(Value* arg, const TCodegenContext&, BasicBlock*& block)
{
const auto val = GetterForInt128(arg, block);
const auto zero = ConstantInt::get(val->getType(), 0);
const auto check = CmpInst::Create(Instruction::ICmp, ICmpInst::ICMP_SLT, val, zero, "check", block);
const auto neg = BinaryOperator::CreateNeg(val, "neg", block);
const auto res = SelectInst::Create(check, SetterForInt128(neg, block), arg, "result", block);
return res;
}
#endif
};
}
void RegisterAbs(IBuiltinFunctionRegistry& registry) {
RegisterUnaryNumericFunctionOpt<TAbs, TUnaryArgsOpt>(registry, "Abs");
RegisterFunctionUnOpt<NUdf::TDataType<NUdf::TInterval>, NUdf::TDataType<NUdf::TInterval>, TAbs, TUnaryArgsOpt>(registry, "Abs");
NDecimal::RegisterUnaryFunction<TDecimalAbs, TUnaryArgsOpt>(registry, "Abs");
}
} // namespace NMiniKQL
} // namespace NKikimr
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