sgemm_tcore: Move global_dmem_load back to kernel.cpp
This commit is contained in:
Hansung Kim
@@ -7,6 +7,214 @@
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#include "include/gemmini.h"
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#include "gemmini_mmio.h"
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inline void global_dmem_load(const uint32_t dim_n, const uint32_t dim_k,
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const uint32_t k, const float *A, const float *B,
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volatile float *local_a, volatile float *local_b,
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const uint32_t tid_in_threadblock,
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const uint32_t threadblock_id_x,
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const uint32_t threadblock_id_y) {
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const uint32_t local_a_row = tid_in_threadblock / BK;
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const uint32_t local_a_col = tid_in_threadblock % BK;
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const uint32_t local_as_row = tid_in_threadblock / BM;
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const uint32_t local_as_col = tid_in_threadblock % BM;
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const uint32_t local_b_row = tid_in_threadblock / BN;
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const uint32_t local_b_col = tid_in_threadblock % BN;
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constexpr uint32_t threads_in_threadblock = (BM * BN) / ELEM_PER_THREAD;
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// Data move from GMEM to SMEM
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//
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// Make sure global offset values for A and B are contiguous between
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// neighboring threads to ensure GMEM coalescing.
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//
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// TODO: Sharedmem swizzling is important here
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if constexpr (!TRANSPOSE_AS) {
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// FIXME: !TRANSPOSE_AS code is old
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const uint32_t global_a_row = BM * threadblock_id_y + local_a_row;
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// number of rows a full TB can read at a time
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constexpr uint32_t row_stride_a = threads_in_threadblock / BK;
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const float *global_a = A + dim_k * global_a_row + (k + local_a_col);
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volatile float *local_a_tmp = local_a + BK * local_a_row + local_a_col;
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#pragma GCC unroll 1
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for (uint32_t local_row_offset = 0; local_row_offset < BM;
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local_row_offset += row_stride_a) {
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row + local_row_offset) + (k + local_a_col);
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// local_a[BK * (local_a_row + local_row_offset) + local_a_col] =
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// A[global_a_offset];
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*local_a_tmp = *global_a;
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global_a += dim_k * row_stride_a;
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local_a_tmp += BK * row_stride_a;
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}
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} else {
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if constexpr (!GMEM_COALESCED_A) {
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constexpr uint32_t row_stride_as = threads_in_threadblock / BM;
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const uint32_t global_a_row = BM * threadblock_id_y + local_as_col;
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const float *global_a = A + dim_k * global_a_row + (k + local_as_row);
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// FIXME experimenting with global coalescing
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// const uint32_t global_a_row = BM * threadblock_id_y + local_as_row;
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// const float *global_a = A + dim_k * global_a_row + (k + local_as_col);
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volatile float *local_a_tmp = local_a + BM * local_as_row + local_as_col;
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static_assert(
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row_stride_as * 8 <= BK,
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"manual loop unrolling condition not met; consider increasing BK");
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static_assert(
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(BK % (row_stride_as * 8)) == 0,
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"manual loop unrolling condition not met; BK should be power-of-two");
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#pragma GCC unroll 1
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for (uint32_t local_row_offset = 0; local_row_offset < BK;
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local_row_offset += row_stride_as * 8) {
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// @perf: bank conflicts here
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row) + (k + local_as_row + local_row_offset);
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// FIXME experimenting with global coalescing
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row + local_row_offset) + (k + local_as_col);
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// local_a[BM * (local_as_row + local_row_offset) + local_as_col] =
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// A[global_a_offset];
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// *local_a_tmp = *global_a;
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asm volatile ("flw ft0, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft1, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft2, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft3, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft4, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft5, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft6, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("flw ft7, (%0)" :: "r"(global_a));
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global_a += row_stride_as;
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asm volatile ("fsw ft0, %0(%1)" :: "i"(BM * row_stride_as * 0 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft1, %0(%1)" :: "i"(BM * row_stride_as * 1 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft2, %0(%1)" :: "i"(BM * row_stride_as * 2 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft3, %0(%1)" :: "i"(BM * row_stride_as * 3 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft4, %0(%1)" :: "i"(BM * row_stride_as * 4 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft5, %0(%1)" :: "i"(BM * row_stride_as * 5 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft6, %0(%1)" :: "i"(BM * row_stride_as * 6 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft7, %0(%1)" :: "i"(BM * row_stride_as * 7 * sizeof(float)), "r"(local_a_tmp));
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local_a_tmp += BM * row_stride_as * 8;
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}
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} else {
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constexpr uint32_t row_stride_a = threads_in_threadblock / BK;
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const uint32_t global_a_row = BM * threadblock_id_y + local_a_row;
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const float *global_a = A + dim_k * global_a_row + (k + local_a_col);
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// NOTE that SMEM writes are transposed
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volatile float *local_a_tmp = local_a + BM * local_a_col + local_a_row;
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static_assert(
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row_stride_a * 8 <= BM,
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"manual loop unrolling condition not met; consider increasing BM");
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static_assert(
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(BM % (row_stride_a * 8)) == 0,
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"manual loop unrolling condition not met; BM should be power-of-two");
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#pragma GCC unroll 1
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for (uint32_t local_row_offset = 0; local_row_offset < BM;
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local_row_offset += row_stride_a * 8) {
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// const uint32_t global_a_offset =
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// dim_k * (global_a_row + local_row_offset) + (k + local_a_col);
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// NOTE that SMEM writes are transposed
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// local_a[BM * (local_a_col) + local_a_row + local_row_offset] =
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// A[global_a_offset];
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asm volatile ("flw ft0, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft1, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft2, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft3, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft4, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft5, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft6, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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asm volatile ("flw ft7, (%0)" :: "r"(global_a));
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global_a += dim_k * row_stride_a;
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// stride along columns
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asm volatile ("fsw ft0, %0(%1)" :: "i"(row_stride_a * 0 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft1, %0(%1)" :: "i"(row_stride_a * 1 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft2, %0(%1)" :: "i"(row_stride_a * 2 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft3, %0(%1)" :: "i"(row_stride_a * 3 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft4, %0(%1)" :: "i"(row_stride_a * 4 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft5, %0(%1)" :: "i"(row_stride_a * 5 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft6, %0(%1)" :: "i"(row_stride_a * 6 * sizeof(float)), "r"(local_a_tmp));
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asm volatile ("fsw ft7, %0(%1)" :: "i"(row_stride_a * 7 * sizeof(float)), "r"(local_a_tmp));
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local_a_tmp += row_stride_a * 8;
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}
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}
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}
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constexpr uint32_t row_stride_b = threads_in_threadblock / BN;
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const uint32_t global_b_col = BN * threadblock_id_x + local_b_col;
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const float *global_b = B + dim_n * (k + local_b_row) + global_b_col;
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volatile float *local_b_tmp = local_b + BN * local_b_row + local_b_col;
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static_assert(
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row_stride_b * 8 <= BK,
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"manual loop unrolling condition not met; consider increasing BK");
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static_assert(
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(BK % (row_stride_b * 8)) == 0,
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"manual loop unrolling condition not met; BK should be power-of-two");
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#pragma GCC unroll 1
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for (uint32_t load_offset = 0; load_offset < BK;
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load_offset += row_stride_b * 8) {
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// const uint32_t global_b_offset =
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// dim_n * (k + local_b_row + load_offset) + global_b_col;
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// local_b[BN * (local_b_row + load_offset) + local_b_col] =
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// B[global_b_offset];
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// *local_b_tmp = *global_b;
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// global_b += dim_n * row_stride_b;
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// local_b_tmp += BN * row_stride_b;
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asm volatile ("flw ft0, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft1, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft2, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft3, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft4, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft5, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft6, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("flw ft7, (%0)" :: "r"(global_b));
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global_b += dim_n * row_stride_b;
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asm volatile ("fsw ft0, %0(%1)" :: "i"(BN * row_stride_b * 0 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft1, %0(%1)" :: "i"(BN * row_stride_b * 1 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft2, %0(%1)" :: "i"(BN * row_stride_b * 2 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft3, %0(%1)" :: "i"(BN * row_stride_b * 3 * sizeof(float)), "r"(local_b_tmp));
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local_b_tmp += BN * row_stride_b * 4;
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asm volatile ("fsw ft4, %0(%1)" :: "i"(BN * row_stride_b * 0 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft5, %0(%1)" :: "i"(BN * row_stride_b * 1 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft6, %0(%1)" :: "i"(BN * row_stride_b * 2 * sizeof(float)), "r"(local_b_tmp));
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asm volatile ("fsw ft7, %0(%1)" :: "i"(BN * row_stride_b * 3 * sizeof(float)), "r"(local_b_tmp));
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local_b_tmp += BN * row_stride_b * 4;
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}
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}
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inline void thread_block_gemm(kernel_arg_t *__UNIFORM__ arg,
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const uint32_t tid_in_threadblock,
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const uint32_t threads_per_threadblock,
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