RationalValue.hpp

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#pragma once
 
namespace tvm {
 
struct RationalValue {
  uint128 numerator() const { return num; }     
  uint128 denominator() const { return denum; } 
  uint128 num;
  uint128 denum;
};
using price_t = RationalValue;
 
__always_inline
uint128 mul(uint128 amount, RationalValue price) {
  unsigned cost = __builtin_tvm_muldivr(amount.get(), price.numerator().get(), price.denominator().get());
  require((cost >> 128) == 0, error_code::integer_overflow);
  return uint128{cost};
}
 
__always_inline
uint128 operator*(uint128 l, RationalValue r) {
  return mul(l, r);
}
 
__always_inline
uint128 operator*(RationalValue l, uint128 r) {
  return mul(r, l);
}
 
} // namespace tvm