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minor optimisations

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This commit is contained in:
conrad
2021-04-26 17:14:57 +10:00
parent ec91e4c531
commit f45a7a02a3
1 changed files with 15 additions and 12 deletions
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include/armadillo_bits/arrayops_meat.hpp
+15 -12
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@@ -24,24 +24,23 @@ arma_inline
void
arrayops::copy(eT* dest, const eT* src, const uword n_elem)
{
if(dest != src)
if( (dest == src) || (n_elem == 0) ) { return; }
if(is_cx<eT>::no)
{
if(is_cx<eT>::no)
if(n_elem <= 9)
{
if(n_elem <= 9)
{
arrayops::copy_small(dest, src, n_elem);
}
else
{
std::memcpy(dest, src, n_elem*sizeof(eT));
}
arrayops::copy_small(dest, src, n_elem);
}
else
{
if(n_elem > 0) { std::memcpy(dest, src, n_elem*sizeof(eT)); }
std::memcpy(dest, src, n_elem*sizeof(eT));
}
}
else
{
std::memcpy(dest, src, n_elem*sizeof(eT));
}
}
@@ -85,9 +84,13 @@ arrayops::fill_zeros(eT* dest, const uword n_elem)
{
typedef typename get_pod_type<eT>::result pod_type;
if(n_elem == 0) { return; }
if(n_elem == 1) { (*dest) = eT(0); return; }
if(std::numeric_limits<eT>::is_integer || std::numeric_limits<pod_type>::is_iec559)
{
if(n_elem > 0) { std::memset((void*)dest, 0, sizeof(eT)*n_elem); }
std::memset((void*)dest, 0, sizeof(eT)*n_elem);
}
else
{