fragment_multiply_add.h
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#pragma once
#include <cutlass/fragment.h>
namespace cutlass {
namespace gemm {
template <typename Scalar_>
struct FragmentMultiplyAdd {
typedef Shape<1, 1, 1, 1> InstructionShape;
typedef Scalar_ ScalarA;
typedef Scalar_ ScalarB;
typedef Scalar_ ScalarC;
CUTLASS_DEVICE FragmentMultiplyAdd() {}
template <typename Fragment_>
CUTLASS_DEVICE void multiply(Scalar_ a, Fragment_ const& b, Fragment_& d) {
for (int j = 0; j < Fragment_::kElements; ++j) {
d[j] = a * b[j];
}
}
template <typename Fragment_>
CUTLASS_DEVICE void multiply_add(Scalar_ a,
Fragment_ const& b,
Fragment_ const& c,
Fragment_& d) {
for (int j = 0; j < Fragment_::kElements; ++j) {
d[j] = a * b[j] + c[j];
}
}
};
#if !defined(__CUDACC_RTC__) || defined(CUTLASS_NVRTC_HAS_FP16)
template <>
struct FragmentMultiplyAdd<half> {
typedef Shape<1, 1, 1, 1> InstructionShape;
typedef half ScalarA;
typedef half ScalarB;
typedef half ScalarC;
CUTLASS_DEVICE FragmentMultiplyAdd() {}
template <typename Fragment_>
CUTLASS_DEVICE void multiply(half a, Fragment_ const& b, Fragment_& d) {
#if defined(__CUDACC__) && __CUDA_ARCH__ >= 530
// The input.
__half2 const* b_half2 = reinterpret_cast<__half2 const*>(&b[0]);
// The output.
__half2* d_half2 = reinterpret_cast<__half2*>(&d[0]);
// Assemble a half2 from a.
__half2 const a_half2 = __half2half2(a);
for (int i = 0; i < Fragment_::kElements / 2; ++i) {
d_half2[i] = __hmul2(a_half2, b_half2[i]);
}
#endif
}
template <typename Fragment_>
CUTLASS_DEVICE void multiply_add(half a, Fragment_ const& b, Fragment_ const& c, Fragment_& d) {
#if defined(__CUDACC__) && __CUDA_ARCH__ >= 530
// The inputs.
__half2 const* b_half2 = reinterpret_cast<__half2 const*>(&b[0]);
__half2 const* c_half2 = reinterpret_cast<__half2 const*>(&c[0]);
// The output.
__half2* d_half2 = reinterpret_cast<__half2*>(&d[0]);
// Assemble a half2 from a.
__half2 const a_half2 = __half2half2(a);
for (int i = 0; i < Fragment_::kElements / 2; ++i) {
d_half2[i] = __hfma2(a_half2, b_half2[i], c_half2[i]);
}
#endif
}
};
#endif
} // namespace gemm
} // namespace cutlass
cutlass::gemm::FragmentMultiplyAdd::ScalarB
Scalar_ ScalarB
The type for B.
Definition: fragment_multiply_add.h:44
cutlass
Definition: convert.h:33
cutlass::gemm::FragmentMultiplyAdd::multiply
CUTLASS_DEVICE void multiply(Scalar_ a, Fragment_ const &b, Fragment_ &d)
Multiply : d = a*b.
Definition: fragment_multiply_add.h:53
cutlass::gemm::FragmentMultiplyAdd< half >::ScalarA
half ScalarA
The type for A.
Definition: fragment_multiply_add.h:79
cutlass::gemm::FragmentMultiplyAdd< half >::FragmentMultiplyAdd
CUTLASS_DEVICE FragmentMultiplyAdd()
Ctor.
Definition: fragment_multiply_add.h:86
cutlass::gemm::FragmentMultiplyAdd::multiply_add
CUTLASS_DEVICE void multiply_add(Scalar_ a, Fragment_ const &b, Fragment_ const &c, Fragment_ &d)
Multiply : d = a*b + c.
Definition: fragment_multiply_add.h:61
cutlass::gemm::FragmentMultiplyAdd< half >::ScalarC
half ScalarC
The type for C and D.
Definition: fragment_multiply_add.h:83
cutlass::gemm::FragmentMultiplyAdd< half >::multiply_add
CUTLASS_DEVICE void multiply_add(half a, Fragment_ const &b, Fragment_ const &c, Fragment_ &d)
Multiply : d = a*b + c.
Definition: fragment_multiply_add.h:108
cutlass::Shape
A Shape implementing Layout Concept describing the dimensions of a cube.
Definition: shape.h:64
cutlass::gemm::FragmentMultiplyAdd::InstructionShape
Shape< 1, 1, 1, 1 > InstructionShape
The shape of the instruction.
Definition: fragment_multiply_add.h:40
cutlass::gemm::FragmentMultiplyAdd::ScalarC
Scalar_ ScalarC
The type for C and D.
Definition: fragment_multiply_add.h:46
cutlass::gemm::FragmentMultiplyAdd::ScalarA
Scalar_ ScalarA
The type for A.
Definition: fragment_multiply_add.h:42
cutlass::gemm::FragmentMultiplyAdd::FragmentMultiplyAdd
CUTLASS_DEVICE FragmentMultiplyAdd()
Ctor.
Definition: fragment_multiply_add.h:49
fragment.h
Defines Fragment, a statically-sized array for storing parts of matrices within a thread&#39;s registers...
cutlass::gemm::FragmentMultiplyAdd< half >::multiply
CUTLASS_DEVICE void multiply(half a, Fragment_ const &b, Fragment_ &d)
Multiply : d = a*b.
Definition: fragment_multiply_add.h:90
cutlass::gemm::FragmentMultiplyAdd< half >::InstructionShape
Shape< 1, 1, 1, 1 > InstructionShape
The shape of the instruction.
Definition: fragment_multiply_add.h:77
cutlass::gemm::FragmentMultiplyAdd< half >::ScalarB
half ScalarB
The type for B.
Definition: fragment_multiply_add.h:81
cutlass::gemm::FragmentMultiplyAdd
Definition: fragment_multiply_add.h:38