mirror of https://github.com/hpcaitech/ColossalAI
99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
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#include <c10/macros/Macros.h>
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#include <cuda_fp16.h>
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#include <cfloat>
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#include "string"
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template <typename Datatype, int ELEMENTS_PER_LDG>
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__device__ __inline__ void copy_vector(Datatype *dst, const Datatype *src);
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template <>
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__device__ __inline__ void copy_vector<c10::BFloat16, 1>(
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c10::BFloat16 *dst, const c10::BFloat16 *src) {
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*dst = *src;
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}
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template <>
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__device__ __inline__ void copy_vector<c10::BFloat16, 2>(
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c10::BFloat16 *dst, const c10::BFloat16 *src) {
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*((float *)dst) = *((float *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<c10::BFloat16, 4>(
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c10::BFloat16 *dst, const c10::BFloat16 *src) {
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*((float2 *)dst) = *((float2 *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<c10::BFloat16, 8>(
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c10::BFloat16 *dst, const c10::BFloat16 *src) {
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*((float4 *)dst) = *((float4 *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<c10::Half, 1>(c10::Half *dst,
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const c10::Half *src) {
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*dst = *src;
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}
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template <>
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__device__ __inline__ void copy_vector<c10::Half, 2>(c10::Half *dst,
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const c10::Half *src) {
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*((float *)dst) = *((float *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<c10::Half, 4>(c10::Half *dst,
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const c10::Half *src) {
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*((float2 *)dst) = *((float2 *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<c10::Half, 8>(c10::Half *dst,
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const c10::Half *src) {
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*((float4 *)dst) = *((float4 *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<float, 1>(float *dst, const float *src) {
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*dst = *src;
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}
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template <>
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__device__ __inline__ void copy_vector<float, 2>(float *dst, const float *src) {
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*((float2 *)dst) = *((float2 *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<float, 4>(float *dst, const float *src) {
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*((float4 *)dst) = *((float4 *)src);
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}
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template <>
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__device__ __inline__ void copy_vector<float, 8>(float *dst, const float *src) {
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// Since the maximum memory alignment length is 128 bits, we choose float4
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// here.
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*((float4 *)dst) = *((float4 *)src);
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*((float4 *)(dst + 4)) = *((float4 *)(src + 4));
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}
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template <typename T>
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int get_vec_size(const torch::Tensor &tensor) {
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uint64_t address = reinterpret_cast<uint64_t>(tensor.data_ptr<T>());
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const int max_aligned_size = 128;
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const int dtype_size = sizeof(T) * 8;
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const int vec_size = max_aligned_size / sizeof(T) / 8;
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if (address % (dtype_size * 4) == 0) {
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return std::min(4, vec_size);
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} else if (address % (dtype_size * 2) == 0) {
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return std::min(2, vec_size);
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} else {
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return 1;
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}
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}
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