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/*========================== begin_copyright_notice ============================
Copyright (C) 2021-2023 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include <cm-cl/math.h>
#include <cm-cl/vector.h>
#include "../helpers.h"
using namespace cm;
namespace {
template <int N>
CM_NODEBUG CM_INLINE vector<half, N> __impl_uitofp(vector<uint64_t, N> a) {
const vector<uint32_t, N> Zero(0);
const vector<uint32_t, N> Ones(0xffffffff);
vector<uint32_t, 2 *N> LoHi = a.template format<uint32_t>();
vector<uint32_t, N> Lo = LoHi.template select<N, 2>(0);
vector<uint32_t, N> Hi = LoHi.template select<N, 2>(1);
// max half value is 65504 (0xffe0)
// so we can use only Low Part
vector<half, N> Res = Lo;
// NoZeroHi - should be overflow
auto NoZeroHi = Hi != Zero;
Res.merge(vector<half, N>(Ones), NoZeroHi);
return Res;
}
template <int N>
CM_NODEBUG CM_INLINE vector<half, N> __impl_sitofp(vector<int64_t, N> a) {
vector<uint64_t, N> Abs = math::absolute(a);
auto Res = __impl_uitofp(Abs);
Res.merge(-Res, a < 0);
return Res;
}
} // namespace
CM_NODEBUG CM_NOINLINE extern "C" half __vc_builtin_uitofp_f16(uint64_t a) {
vector<uint64_t, 1> va = a;
return __impl_uitofp(va)[0];
}
CM_NODEBUG CM_NOINLINE extern "C" half __vc_builtin_sitofp_f16(int64_t a) {
vector<int64_t, 1> va = a;
return __impl_sitofp(va)[0];
}
#define ITOFP(WIDTH) \
CM_NODEBUG CM_NOINLINE extern "C" cl_vector<half, WIDTH> \
__vc_builtin_uitofp_v##WIDTH##f16(cl_vector<uint64_t, WIDTH> a) { \
vector<uint64_t, WIDTH> va{a}; \
return __impl_uitofp(va).cl_vector(); \
} \
CM_NODEBUG CM_NOINLINE extern "C" cl_vector<half, WIDTH> \
__vc_builtin_sitofp_v##WIDTH##f16(cl_vector<int64_t, WIDTH> a) { \
vector<int64_t, WIDTH> va{a}; \
return __impl_sitofp(va).cl_vector(); \
}
ITOFP(1)
ITOFP(2)
ITOFP(4)
ITOFP(8)
ITOFP(16)
ITOFP(32)
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