[SYCL] Inline trivial util functions for half/half2 in intel math header

[jinge90]

Missing "inline" will lead to multiple definition linker error for these trivial functions. The scenario can be described as following:
a.cpp
#include <sycl/sycl.hpp>
#include <sycl/ext/intel/math.hpp>

b.cpp
#include <sycl/sycl.hpp>
#include <sycl/ext/intel/math.hpp>
int main() { return 0; }

clang++ -fsycl a.cpp b.cpp

[jinge90]

Hi, @tangjj11
Could you try this PR in your side to see if the error is gone?
Thanks very much.

[uditagarwal97]

@jinge90 Can you please update the PR description with why this change is needed? What error does it fix?

[tangjj11]

Can you add a lit test to build multi file:
a.dp.cpp

#include <sycl/sycl.hpp>
#include <sycl/ext/intel/math.hpp>

b.dp.cpp

#include <sycl/sycl.hpp>
#include <sycl/ext/intel/math.hpp>
int main() { return 0; }

command:

icpx -fsycl a.dp.cpp b.dp.cpp

[jinge90]

@jinge90 Can you please update the PR description with why this change is needed? What error does it fix?

Hi, @uditagarwal97
Just updated the description, thanks very much.

[uditagarwal97]

@jinge90 Can you please update the PR description with why this change is needed? What error does it fix?

Hi, @uditagarwal97 Just updated the description, thanks very much.

Thanks. The changes looks good to me. Please add a LIT test as suggested by @tangjj11

[jinge90]

@jinge90 Can you please update the PR description with why this change is needed? What error does it fix?

Hi, @uditagarwal97 Just updated the description, thanks very much.

Thanks. The changes looks good to me. Please add a LIT test as suggested by @tangjj11

Hi, @uditagarwal97
Just split original test to cover separate build scenario.
Thanks very much.

[jinge90]

Hi, @intel/llvm-gatekeepers
Could you help merge this PR?
Thanks very much.