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Make lerp usable on device #352

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Jan 19, 2023
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Make lerp usable on device #352

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7 changes: 5 additions & 2 deletions include/cuda/std/detail/libcxx/include/cmath
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Original file line number Diff line number Diff line change
Expand Up @@ -657,8 +657,8 @@ __libcpp_isfinite_or_builtin(_A1 __lcpp_x) _NOEXCEPT

#if _LIBCUDACXX_STD_VER > 17
template <typename _Fp>
constexpr
_Fp __lerp(_Fp __a, _Fp __b, _Fp __t) noexcept {
_LIBCUDACXX_INLINE_VISIBILITY
constexpr _Fp __lerp(_Fp __a, _Fp __b, _Fp __t) noexcept {
if ((__a <= 0 && __b >= 0) || (__a >= 0 && __b <= 0))
return __t * __b + (1 - __t) * __a;

Expand All @@ -670,12 +670,15 @@ _Fp __lerp(_Fp __a, _Fp __b, _Fp __t) noexcept {
return __x < __b ? __x : __b;
}

_LIBCUDACXX_INLINE_VISIBILITY
constexpr float
lerp(float __a, float __b, float __t) _NOEXCEPT { return __lerp(__a, __b, __t); }

_LIBCUDACXX_INLINE_VISIBILITY
constexpr double
lerp(double __a, double __b, double __t) _NOEXCEPT { return __lerp(__a, __b, __t); }

_LIBCUDACXX_INLINE_VISIBILITY
constexpr long double
lerp(long double __a, long double __b, long double __t) _NOEXCEPT { return __lerp(__a, __b, __t); }

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