igemm_swizzle.h
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#pragma once
#include <cutlass/fragment.h>
namespace cutlass {
namespace gemm {
template <typename GlobalIterator_>
struct IgemmSwizzle {
typedef GlobalIterator_ GlobalIterator;
typedef typename GlobalIterator::Fragment Fragment;
typedef typename GlobalIterator::FragmentShape FragmentShape;
typedef Fragment InputFragment;
typedef Fragment OutputFragment;
static_assert((platform::is_same<typename Fragment::Element, int8_t>::value), "Works on int8");
static_assert(FragmentShape::kH % 4 == 0 && ShapeCount<FragmentShape>::kWc % 4 == 0,
"Not multiple of 4");
CUTLASS_DEVICE IgemmSwizzle() {}
CUTLASS_DEVICE void transform(Fragment const& src, Fragment& dst) {
// Expose src/dst as int arrays.
int const* src_int = reinterpret_cast<int const*>(&src[0]);
int* dst_int = reinterpret_cast<int*>(&dst[0]);
// Transpose the data.
for (int d = 0; d < FragmentShape::kD; ++d) {
for (int h = 0; h < FragmentShape::kH / 4; ++h) {
for (int w = 0; w < ShapeCount<FragmentShape>::kWc / 4; ++w) {
int const i0 = d * (ShapeCount<FragmentShape>::kHwc / 4) +
(4 * h + 0) * (ShapeCount<FragmentShape>::kWc / 4) + w;
int const i1 = d * (ShapeCount<FragmentShape>::kHwc / 4) +
(4 * h + 1) * (ShapeCount<FragmentShape>::kWc / 4) + w;
int const i2 = d * (ShapeCount<FragmentShape>::kHwc / 4) +
(4 * h + 2) * (ShapeCount<FragmentShape>::kWc / 4) + w;
int const i3 = d * (ShapeCount<FragmentShape>::kHwc / 4) +
(4 * h + 3) * (ShapeCount<FragmentShape>::kWc / 4) + w;
int a0 = src_int[i0];
int a1 = src_int[i1];
int a2 = src_int[i2];
int a3 = src_int[i3];
int b0, b1, b2, b3, c0;
asm volatile("prmt.b32 %0, %1, %2, 0x0040;" : "=r"(b0) : "r"(a0), "r"(a1));
asm volatile("prmt.b32 %0, %1, %2, 0x0040;" : "=r"(c0) : "r"(a2), "r"(a3));
asm volatile("prmt.b32 %0, %1, %2, 0x5410;" : "=r"(b0) : "r"(b0), "r"(c0));
asm volatile("prmt.b32 %0, %1, %2, 0x0051;" : "=r"(b1) : "r"(a0), "r"(a1));
asm volatile("prmt.b32 %0, %1, %2, 0x0051;" : "=r"(c0) : "r"(a2), "r"(a3));
asm volatile("prmt.b32 %0, %1, %2, 0x5410;" : "=r"(b1) : "r"(b1), "r"(c0));
asm volatile("prmt.b32 %0, %1, %2, 0x0062;" : "=r"(b2) : "r"(a0), "r"(a1));
asm volatile("prmt.b32 %0, %1, %2, 0x0062;" : "=r"(c0) : "r"(a2), "r"(a3));
asm volatile("prmt.b32 %0, %1, %2, 0x5410;" : "=r"(b2) : "r"(b2), "r"(c0));
asm volatile("prmt.b32 %0, %1, %2, 0x0073;" : "=r"(b3) : "r"(a0), "r"(a1));
asm volatile("prmt.b32 %0, %1, %2, 0x0073;" : "=r"(c0) : "r"(a2), "r"(a3));
asm volatile("prmt.b32 %0, %1, %2, 0x5410;" : "=r"(b3) : "r"(b3), "r"(c0));
dst_int[i0] = b0;
dst_int[i1] = b1;
dst_int[i2] = b2;
dst_int[i3] = b3;
}
}
}
}
};
} // namespace gemm
} // namespace cutlass
cutlass
Definition: convert.h:33
cutlass::platform::is_same
std::is_same (false specialization)
Definition: platform.h:412
cutlass::gemm::IgemmSwizzle::FragmentShape
GlobalIterator::FragmentShape FragmentShape
The shape of the source fragment.
Definition: igemm_swizzle.h:44
cutlass::gemm::IgemmSwizzle
Definition: igemm_swizzle.h:38
cutlass::gemm::IgemmSwizzle::GlobalIterator
GlobalIterator_ GlobalIterator
The global iterator.
Definition: igemm_swizzle.h:40
cutlass::gemm::IgemmSwizzle::transform
CUTLASS_DEVICE void transform(Fragment const &src, Fragment &dst)
Transform a fragment.
Definition: igemm_swizzle.h:62
cutlass::gemm::IgemmSwizzle::OutputFragment
Fragment OutputFragment
The destination fragment.
Definition: igemm_swizzle.h:49
static_assert
#define static_assert(__e, __m)
Definition: platform.h:145
cutlass::gemm::IgemmSwizzle::InputFragment
Fragment InputFragment
The source fragment.
Definition: igemm_swizzle.h:47
cutlass::gemm::IgemmSwizzle::Fragment
GlobalIterator::Fragment Fragment
The source fragment.
Definition: igemm_swizzle.h:42
cutlass::gemm::IgemmSwizzle::IgemmSwizzle
CUTLASS_DEVICE IgemmSwizzle()
The src/dst must be int8 fragments.
Definition: igemm_swizzle.h:59
fragment.h
Defines Fragment, a statically-sized array for storing parts of matrices within a thread&#39;s registers...
cutlass::ShapeCount
Compute derived counted of a Layout Concept based class.
Definition: shape.h:79