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Add support for GHDL modfloor operator

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This commit is contained in:
Michael Nolan 2022-07-05 15:15:54 -04:00
parent 086c2f3224
commit 24b895778a
2 changed files with 22 additions and 1 deletions
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21
backends/cxxrtl/cxxrtl.h
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@ -1575,6 +1575,27 @@ value<BitsY> mod_ss(const value<BitsA> &a, const value<BitsB> &b) {
return divmod_ss<BitsY>(a, b).second;
}
template<size_t BitsY, size_t BitsA, size_t BitsB>
CXXRTL_ALWAYS_INLINE
value<BitsY> modfloor_uu(const value<BitsA> &a, const value<BitsB> &b) {
return divmod_uu<BitsY>(a, b).second;
}
// GHDL Modfloor operator. Returns r=a mod b, such that r has the same sign as b and
// a=b*N+r where N is some integer
// In practical terms, when a and b have different signs and the remainder returned by divmod_ss is not 0
// then return the remainder + b
template<size_t BitsY, size_t BitsA, size_t BitsB>
CXXRTL_ALWAYS_INLINE
value<BitsY> modfloor_ss(const value<BitsA> &a, const value<BitsB> &b) {
value<BitsY> r;
r = divmod_ss<BitsY>(a, b).second;
if((b.is_neg() != a.is_neg()) && !r.is_zero())
return add_ss<BitsY>(b, r);
return r;
}
// Memory helper
struct memory_index {
bool valid;