10#ifndef EIGEN_TYPE_CASTING_GPU_H
11#define EIGEN_TYPE_CASTING_GPU_H
17#if (defined(EIGEN_HAS_CUDA_FP16) && defined(EIGEN_CUDA_ARCH) && EIGEN_CUDA_ARCH >= 300) || \
18 (defined(EIGEN_HAS_HIP_FP16) && defined(EIGEN_HIP_DEVICE_COMPILE))
22struct type_casting_traits<
Eigen::half, float> {
30template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE float4 pcast<half2, float4>(
const half2& a,
const half2& b) {
31 float2 r1 = __half22float2(a);
32 float2 r2 = __half22float2(b);
33 return make_float4(r1.x, r1.y, r2.x, r2.y);
37template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE Packet4h2 pcast<float4, Packet4h2>(
const float4& a,
const float4& b) {
39 half2* r_alias=
reinterpret_cast<half2*
>(&r);
40 r_alias[0]=__floats2half2_rn(a.x,a.y);
41 r_alias[1]=__floats2half2_rn(a.z,a.w);
42 r_alias[2]=__floats2half2_rn(b.x,b.y);
43 r_alias[3]=__floats2half2_rn(b.z,b.w);
48struct type_casting_traits<float,
Eigen::half> {
56template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE float4 pcast<Packet4h2, float4>(
const Packet4h2& a) {
59 const half2* a_alias=
reinterpret_cast<const half2*
>(&a);
60 float2 r1 = __half22float2(a_alias[0]);
61 float2 r2 = __half22float2(a_alias[1]);
62 r.x=
static_cast<float>(r1.x);
63 r.y=
static_cast<float>(r1.y);
64 r.z=
static_cast<float>(r2.x);
65 r.w=
static_cast<float>(r2.y);
69template<> EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE half2 pcast<float4, half2>(
const float4& a) {
71 return __floats2half2_rn(a.x, a.y);
Namespace containing all symbols from the Eigen library.
Definition: Core:141