cuda::neg
template <typename T>
[[nodiscard]] __host__ __device__ inline constexpr
T neg(T value) noexcept;
The function computes the negation of the input value accepting both signed and unsigned integer types. It doesn’t emit any warnings for signed integer overflow and applying - to unsigned integer types.
Parameters
value: The input value.
Return value
The negated value of the input value.
Constraints
Tis an integer type.
Example
#include <cuda/cmath>
#include <cuda/std/cassert>
#include <cuda/std/limits>
__global__ void neg_kernel() {
using cuda::std::numeric_limits;
assert(cuda::neg(1) == -1);
assert(cuda::neg(20) == -20);
assert(cuda::neg(127u) == 4294967169u);
assert(cuda::neg(-127) == 127);
assert(cuda::neg(cuda::std::numeric_limits<int>::min()) == cuda::std::numeric_limits<int>::min());
}
int main() {
neg_kernel<<<1, 1>>>();
cudaDeviceSynchronize();
return 0;
}