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gemmini.cc
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1964 lines (1668 loc) · 73.1 KB
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#include "gemmini.h"
#include <riscv/mmu.h>
#include <riscv/trap.h>
#include <stdexcept>
#include <iostream>
#include <assert.h>
#include <math.h>
using namespace std;
REGISTER_EXTENSION(gemmini, []() { return new gemmini_t; })
#define dprintf(...) { if (p->get_log_commits_enabled()) printf(__VA_ARGS__); }
void gemmini_state_t::reset()
{
enable = true;
// mode = OS;
// sys_act = NONE;
// acc_act = NONE;
// sys_shift = 0;
// output_sp_addr = 0;
// load_stride = DIM * sizeof(elem_t);
// store_stride = DIM * sizeof(elem_t);
// pool_stride = 0;
// load_shrunk = false;
spad.clear();
spad.resize(sp_matrices*DIM, std::vector<elem_t>(DIM, 0));
pe_state.clear();
pe_state.resize(DIM, std::vector<acc_t>(DIM));
accumulator.clear();
accumulator.resize(accum_rows, std::vector<acc_t>(DIM, 0));
// cisc reset
a_addr = b_addr = c_addr = d_addr = 0;
m = n = k = 0;
repeating_bias = false;
// Norm reset
for (int i = 0; i < NORM_STAT_IDS; i++) norm_reset[i] = true;
// Dummy counter reset
snapshot_enable = false;
op_in_progress = false;
resetted = true;
printf("Gemmini extension configured with:\n");
printf(" dim = %u\n", DIM);
}
void gemmini_t::reset() {
gemmini_state.reset();
}
template <class T>
T gemmini_t::read_from_dram(reg_t addr) {
T value = 0;
for (size_t byte_idx = 0; byte_idx < sizeof(T); ++byte_idx) {
value |= p->get_mmu()->load<uint8_t>(addr + byte_idx) << (byte_idx*8);
}
return value;
}
template <class T>
std::vector<std::vector<T>> *
matrix_zeroes(reg_t rows, reg_t cols) {
return new std::vector<std::vector<T>>(rows, std::vector<T>(cols, 0));
}
template <class T>
std::vector<std::vector<T>> *
gemmini_t::read_matrix_from_dram(reg_t addr, reg_t rows, reg_t cols,
bool zeroable, bool repeating_bias) {
// Read and return Matrix of size `rows*cols` from address `addr` in main
// memory
// Initialize to all zeroes
auto result = matrix_zeroes<T>(rows, cols);
// if an input matrix is at addr 0, it is NULL, so don't do anything with
// it only the D matrix is zeroable; the A, B matrices must be valid
if(addr == 0) {
if(zeroable) {
return result;
}
printf("ERROR: non-zeroable matrix given address zero!\n");
exit(1);
}
// Load from memory
for (size_t i = 0; i < rows; i++) {
auto ii = repeating_bias ? 0 : i;
auto const dram_row_addr = addr + ii*sizeof(T)*cols;
for (size_t j = 0; j < cols; j++) {
auto const dram_byte_addr = dram_row_addr + j*sizeof(T);
#ifdef ELEM_T_IS_FLOAT
result->at(i).at(j) = elem_t_bits_to_elem_t(gemmini_t::read_from_dram<elem_t_bits>(dram_byte_addr));
#else
result->at(i).at(j) = gemmini_t::read_from_dram<elem_t>(dram_byte_addr);
#endif
}
}
return result;
}
template <class T>
void gemmini_t::write_to_dram(reg_t addr, T data) {
for (size_t byte_idx = 0; byte_idx < sizeof(T); ++byte_idx) {
p->get_mmu()->store<uint8_t>(addr + byte_idx, (data >> (byte_idx*8)) & 0xFF);
}
}
// Move a gemmini block from DRAM at dram_addr (byte addr) to
// the scratchpad/accumulator at sp_addr (gemmini-row addressed)
void gemmini_t::mvin(reg_t dram_addr, reg_t sp_addr, int state_id) {
bool const accumulator = (sp_addr >> 31) & 0x1;
bool const accumulate = (sp_addr >> 30) & 0x1;
auto const base_row_addr = (sp_addr & 0x1FFFFFFF); // Strip accumulator addressing bits [31:29]
auto const cols = (sp_addr >> addr_len) & 0xFFFF;
auto const rows = (sp_addr >> (addr_len + 16)) & 0xFFFF;
bool is_zeros = dram_addr == 0;
auto const load_stride = gemmini_state.load_strides[state_id];
auto const load_block_stride = gemmini_state.load_block_strides[state_id];
auto const load_shrunk = gemmini_state.load_shrunks[state_id];
#if defined(HAS_MVIN_SCALE) || defined(HAS_MVIN_ACC_SCALE)
auto const load_scale = gemmini_state.load_scales[state_id];
#endif
auto const pixels_per_row = gemmini_state.pixels_per_rows[state_id];
dprintf("GEMMINI: mvin - 0x%02lx cols and 0x%02lx rows from 0x%08lx to addr 0x%08lx\n", cols, rows, dram_addr, sp_addr & 0xFFFFFFFF);
for (size_t row = 0; row < rows; ++row) {
auto const dram_row_addr = dram_addr + row*load_stride;
for (size_t col = 0; col < cols; ++col) {
const size_t block = col / DIM;
const size_t spad_col = col % DIM;
const size_t spad_row = base_row_addr + row + block*load_block_stride;
for (size_t pixel = 0; pixel < pixels_per_row && pixel <= spad_row; pixel++) {
if (accumulator) {
auto const dram_byte_addr = dram_row_addr + col *
(load_shrunk ? sizeof(elem_t) : sizeof(acc_t));
acc_t value;
if (is_zeros) {
value = 0;
} else if (!load_shrunk) {
#ifdef ELEM_T_IS_FLOAT
value = acc_t_bits_to_acc_t(read_from_dram<acc_t_bits>(dram_byte_addr));
#else
value = read_from_dram<acc_t>(dram_byte_addr);
#endif
#ifdef HAS_MVIN_ACC_SCALE
value = mvin_scale_acc(value, load_scale);
#endif
} else {
#ifdef ELEM_T_IS_FLOAT
value = elem_t_bits_to_elem_t(read_from_dram<elem_t_bits>(dram_byte_addr));
#else
value = read_from_dram<elem_t>(dram_byte_addr);
#endif
#ifdef HAS_MVIN_SCALE
value = mvin_scale(value, load_scale);
#endif
}
if (accumulate) {
gemmini_state.accumulator.at(spad_row - pixel).at(spad_col + pixel*cols) += value;
} else {
gemmini_state.accumulator.at(spad_row - pixel).at(spad_col + pixel*cols) = value;
}
#ifdef ELEM_T_IS_FLOAT
dprintf("%f ", gemmini_state.accumulator.at(spad_row).at(spad_col));
#else
dprintf("%d ", gemmini_state.accumulator.at(spad_row).at(spad_col));
#endif
} else {
auto const dram_byte_addr = dram_row_addr + col*sizeof(elem_t);
elem_t value;
if (is_zeros) {
value = 0;
} else {
#ifdef ELEM_T_IS_FLOAT
value = elem_t_bits_to_elem_t(read_from_dram<elem_t_bits>(dram_byte_addr));
#else
value = read_from_dram<elem_t>(dram_byte_addr);
#endif
#ifdef HAS_MVIN_SCALE
value = mvin_scale(value, load_scale);
#endif
}
gemmini_state.spad.at(spad_row - pixel).at(spad_col + pixel * cols) = value;
#ifdef ELEM_T_IS_FLOAT
dprintf("%f ", gemmini_state.spad.at(spad_row).at(spad_col));
#else
dprintf("%d ", gemmini_state.spad.at(spad_row).at(spad_col));
#endif
}
}
}
dprintf("\n");
}
}
void gemmini_t::mvout(reg_t dram_addr, reg_t sp_addr) {
bool const accumulator = (sp_addr >> 31) & 0x1;
bool const full = (sp_addr >> 29) & 0x1;
auto const norm_cmd = static_cast<gemmini_state_t::NormCmd>((sp_addr >> 26) & 0x7);
auto const base_row_addr = (sp_addr & 0x3FFFFFF); // Strip accumulator addressing bits [31:26]
auto const cols = (sp_addr >> addr_len) & 0xFFFF;
auto const rows = (sp_addr >> (addr_len + 16)) & 0xFFFF;
const int block_stride = DIM;
dprintf("GEMMINI: mvout - 0x%02lx cols and 0x%02lx rows from 0x%08lx to addr 0x%08lx\n", cols, rows, sp_addr, dram_addr);
if (gemmini_state.pool_stride == 0) {
for (size_t i = 0; i < rows; ++i) {
auto const dram_row_addr = dram_addr + i*gemmini_state.store_stride;
bool should_write = true;
for (size_t j = 0; j < cols; j += DIM) {
const size_t block = j / DIM;
const size_t spad_row = base_row_addr + block*block_stride + i;
const size_t len = cols - j > DIM ? DIM : cols - j;
const bool is_last = j + DIM >= cols;
const auto n_cmd = is_last ? norm_cmd : non_terminating_norm_cmd(norm_cmd);
if(accumulator) {
should_write = apply_norm(
&gemmini_state.accumulator.at(spad_row).at(0),
len, n_cmd);
}
}
if (!should_write)
continue;
for (size_t j = 0; j < cols; ++j) {
const size_t block = j / DIM;
const size_t spad_col = j % DIM;
const size_t spad_row = base_row_addr + block*block_stride + i;
if (accumulator) { // Apply shift and activation when moving out of accumulator
acc_t acc_value = gemmini_state.accumulator.at(spad_row).at(spad_col);
acc_value = apply_pre_activation_acc(acc_value);
auto shifted = acc_scale(acc_value, gemmini_state.acc_shift);
elem_t activated = apply_activation_acc(shifted); // Activation is always applied in either WS/OS mode
auto const sizeof_output = full ? sizeof(acc_t) : sizeof(elem_t);
auto const dram_byte_addr = dram_row_addr + j*sizeof_output;
#ifdef ELEM_T_IS_FLOAT
if (full) {
write_to_dram<acc_t_bits>(dram_byte_addr, acc_t_to_acc_t_bits(acc_value));
dprintf("%f ", acc_value);
} else {
write_to_dram<elem_t_bits>(dram_byte_addr, elem_t_to_elem_t_bits(activated));
dprintf("%f ", activated);
}
#else
if (full) {
write_to_dram<acc_t>(dram_byte_addr, acc_value);
dprintf("%d ", acc_value);
} else {
write_to_dram<elem_t>(dram_byte_addr, activated);
dprintf("%d ", activated);
}
#endif
} else { // Scratchpad, write to DRAM directly
auto const dram_byte_addr = dram_row_addr + j*sizeof(elem_t);
elem_t value = gemmini_state.spad.at(spad_row).at(spad_col);
#ifdef ELEM_T_IS_FLOAT
write_to_dram<elem_t_bits>(dram_byte_addr, elem_t_to_elem_t_bits(value));
dprintf("%f ", value);
#else
write_to_dram<elem_t>(dram_byte_addr, value);
dprintf("%d ", value);
#endif
}
}
dprintf("\n");
}
} else {
// Perform pooling
auto const pool_stride = gemmini_state.pool_stride;
auto const pool_size = gemmini_state.pool_size;
auto const pool_out_dim = gemmini_state.pool_out_dim;
auto const porows = gemmini_state.pool_porows;
auto const pocols = gemmini_state.pool_pocols;
auto const orows = gemmini_state.pool_orows;
auto const ocols = gemmini_state.pool_ocols;
auto const plpad = gemmini_state.pool_lpad;
auto const pupad = gemmini_state.pool_upad;
auto const channels = cols;
for (int porow = 0; porow < porows; porow++) {
for (int pocol = 0; pocol < pocols; pocol++) {
for (int poch = 0; poch < (int)channels; poch++) {
elem_t value = elem_t_min;
for (int wrow = 0; wrow < pool_size; wrow++) {
for (int wcol = 0; wcol < pool_size; wcol++) {
const int orow = porow * pool_stride + wrow - pupad;
const int ocol = pocol * pool_stride + wcol - plpad;
const int row_addr = base_row_addr + orow*ocols + ocol;
elem_t elem;
if (orow < 0 || ocol < 0 || orow >= orows || ocol >= ocols) {
elem = 0;
} else if (accumulator) {
acc_t acc_value = gemmini_state.accumulator.at(row_addr).at(poch);
auto shifted = acc_scale(acc_value, gemmini_state.acc_shift);
elem = apply_activation_acc(shifted); // Activation is always applied in either WS/OS mode
} else {
elem = gemmini_state.spad.at(row_addr).at(poch);
}
if (elem > value) {
value = elem;
}
}
}
auto const dram_byte_addr = dram_addr + (porow * pool_out_dim + pocol) * gemmini_state.store_stride + poch * sizeof(elem_t);
#ifdef ELEM_T_IS_FLOAT
write_to_dram<elem_t_bits>(dram_byte_addr, elem_t_to_elem_t_bits(value));
#else
write_to_dram<elem_t>(dram_byte_addr, value);
#endif
}
}
}
}
}
void gemmini_t::preload(reg_t bd_addr, reg_t c_addr) {
// TODO: rename these state variables
gemmini_state.preload_sp_addr = static_cast<uint32_t>(bd_addr & 0xFFFFFFFF);
gemmini_state.output_sp_addr = static_cast<uint32_t>(c_addr & 0xFFFFFFFF);
gemmini_state.preload_cols = (bd_addr >> addr_len) & 0xFFFF;
gemmini_state.preload_rows = (bd_addr >> (addr_len + 16)) & 0xFFFF;
gemmini_state.output_cols = (c_addr >> addr_len) & 0xFFFF;
gemmini_state.output_rows = (c_addr >> (addr_len + 16)) & 0xFFFF;
dprintf("GEMMINI: preload - scratchpad output addr = 0x%08x, scratchpad preload addr = 0x%08x\n",
gemmini_state.output_sp_addr, gemmini_state.preload_sp_addr);
}
void gemmini_t::config(reg_t rs1, reg_t rs2) {
if ((rs1 & 0b11) == 0) { // rs1[1:0] == 2'b00, config_ex, configure execute pipeline
gemmini_state_t::Dataflow new_mode;
gemmini_state_t::Activation new_act;
reg_t new_sys_shift, new_sys_acc_shift, new_c_stride, new_a_stride, new_a_transpose, new_b_transpose;
auto rs1_2 = (rs1 >> 2) & 0b1; // extract rs1[2], 0 = output stationary, 1 = weight stationary
if (rs1_2 == 0) {
new_mode = gemmini_state_t::OS;
} else {
new_mode = gemmini_state_t::WS;
}
auto rs1_4_3 = (rs1 >> 3) & 0b11; // extract rs1[4:3], 0 = no activation, 1 = ReLU, 2 = ReLU6
if (rs1_4_3 == 0) {
if (static_cast<int>(gemmini_state.acc_act) != 4) {
new_act = gemmini_state_t::NONE;
} else {
new_act = gemmini_state_t::SOFTMAX;
}
} else if (rs1_4_3 == 1) {
new_act = gemmini_state_t::RELU;
} else if (rs1_4_3 == 2) {
new_act = gemmini_state_t::LAYERNORM;
} else if (rs1_4_3 == 3) {
new_act = gemmini_state_t::IGELU;
} else {
assert(false);
}
new_sys_shift = (rs2) & 0xFFFFFFFF;
new_sys_acc_shift = (rs1 >> 32) & 0xFFFFFFFF;
new_c_stride = (rs2 >> 48) & 0xFFFF;
new_a_stride = (rs1 >> 16) & 0xFFFF;
new_a_transpose = (rs1 >> 8) & 0x1;
new_b_transpose = (rs1 >> 9) & 0x1;
const bool set_only_strides = (rs1 >> 7) & 0x1;
dprintf("GEMMINI: config_ex - set dataflow mode from %d to %d\n", gemmini_state.mode, new_mode);
dprintf("GEMMINI: config_ex - set activation function from %d to %d\n", gemmini_state.sys_act, new_act);
dprintf("GEMMINI: config_ex - set sys_shift from %lu to %lu\n", gemmini_state.sys_shift, new_sys_shift);
// assert(new_acc_shift >= 0 && new_acc_shift < sizeof(acc_t)*8);
assert(new_sys_shift >= 0 && new_sys_shift < sizeof(output_t)*8);
if (!set_only_strides) {
gemmini_state.mode = new_mode;
gemmini_state.sys_act = new_act;
gemmini_state.sys_shift = new_sys_shift;
gemmini_state.sys_acc_shift = new_sys_acc_shift;
gemmini_state.a_transpose = new_a_transpose;
gemmini_state.b_transpose = new_b_transpose;
}
gemmini_state.c_stride = new_c_stride;
gemmini_state.a_stride = new_a_stride;
assert(!(new_mode == gemmini_state_t::OS && !new_a_transpose && new_b_transpose) && !(new_mode == gemmini_state_t::WS && new_a_transpose && new_b_transpose));
} else if ((rs1 & 0b11) == 1) { // rs1[1:0] == 2'b01, config_mvin, configure load pipeline
const int state_id = (rs1 >> 3) & 0x3;
dprintf("GEMMINI: config_mvin - set load stride from %lu to %lu\n", gemmini_state.load_strides[state_id], rs2);
gemmini_state.load_strides[state_id] = rs2;
gemmini_state.load_block_strides[state_id] = (rs1 >> 16) & 0xFFFF;
#if defined(HAS_MVIN_SCALE) || defined(HAS_MVIN_ACC_SCALE)
dprintf("GEMMINI: config_mvin - set load scale from %lu to %lu\n", gemmini_state.load_scales[state_id], scale_t_bits_to_scale_t(rs1 >> 32));
gemmini_state.load_scales[state_id] = scale_t_bits_to_scale_t(rs1 >> 32);
gemmini_state.load_shrunks[state_id] = (rs1 >> 2) & 1;
#endif
gemmini_state.pixels_per_rows[state_id] = (rs1 >> 8) & 0xFF;
if (gemmini_state.pixels_per_rows[state_id] == 0)
gemmini_state.pixels_per_rows[state_id] = 1;
#ifndef HAS_FIRST_LAYER_OPTIMIZATIONS
assert(gemmini_state.pixels_per_rows[state_id] <= 1, "If Gemmini is built without first-layer optimizations, then 'pixels_per_rows' cannot be larger than 1\n");
#endif
} else if ((rs1 & 0b11) == 2) { // rs1[1:0] == 2'b10, config_mvout, configure store pipeline
dprintf("GEMMINI: config_mvout - set store stride from %lu to %lu\n", gemmini_state.store_stride, rs2 & 0xFFFFFFFF);
gemmini_state.store_stride = rs2 & 0xFFFFFFFF;
gemmini_state_t::Activation new_act;
auto rs1_3_2 = (rs1 >> 2) & 0b11; // extract rs1[3:2], 0 = no activation, 1 = ReLU, 2 = ReLU6
if (rs1_3_2 == 0) {
if (static_cast<int>(gemmini_state.acc_act) != 4) {
new_act = gemmini_state_t::NONE;
} else {
new_act = gemmini_state_t::SOFTMAX;
}
} else if (rs1_3_2 == 1) {
new_act = gemmini_state_t::RELU;
} else if (rs1_3_2 == 2) {
new_act = gemmini_state_t::LAYERNORM;
} else if (rs1_3_2 == 3) {
new_act = gemmini_state_t::IGELU;
} else {
assert(false);
}
gemmini_state.acc_act = new_act;
auto new_acc_shift = (rs2 >> 32) & 0xFFFFFFFF;
gemmini_state.acc_shift = acc_scale_t_bits_to_acc_scale_t(new_acc_shift);
gemmini_state.pool_stride = (rs1 >> 4) & 0x3;
gemmini_state.pool_size = (rs1 >> 6) & 0x3;
gemmini_state.pool_upad = (rs1 >> 8) & 0x3;
gemmini_state.pool_lpad = (rs1 >> 10) & 0x3;
gemmini_state.pool_out_dim = (rs1 >> 24) & 0xFF;
gemmini_state.pool_porows = (rs1 >> 32) & 0xFF;
gemmini_state.pool_pocols = (rs1 >> 40) & 0xFF;
gemmini_state.pool_orows = (rs1 >> 48) & 0xFF;
gemmini_state.pool_ocols = (rs1 >> 56) & 0xFF;
if (gemmini_state.pool_stride == 0) {
dprintf("GEMMINI: config_mvout - no pooling\n");
} else {
dprintf("GEMMINI: config_mvout - set pool_stride to %u\n", gemmini_state.pool_stride);
dprintf("GEMMINI: config_mvout - set pool_size to %u\n", gemmini_state.pool_size);
dprintf("GEMMINI: config_mvout - set pool_upad to %u\n", gemmini_state.pool_upad);
dprintf("GEMMINI: config_mvout - set pool_lpad to %u\n", gemmini_state.pool_lpad);
dprintf("GEMMINI: config_mvout - set pool_out_dim to %u\n", gemmini_state.pool_out_dim);
dprintf("GEMMINI: config_mvout - set pool_porows to %u\n", gemmini_state.pool_porows);
dprintf("GEMMINI: config_mvout - set pool_pocols to %u\n", gemmini_state.pool_pocols);
dprintf("GEMMINI: config_mvout - set pool_orows to %u\n", gemmini_state.pool_orows);
dprintf("GEMMINI: config_mvout - set pool_ocols to %u\n", gemmini_state.pool_ocols);
dprintf("GEMMINI: config_mvout - rs1 is %llx\n", rs1);
}
} else if ((rs1 & 0b11) == 3) { // rs1[1:0] == 2'b11, config_norm, configure norm pipeline
gemmini_state.norm_stat_id = (rs1 >> 8) & 0xFF;
if (!((rs1 >> 17) & 1)) { // set stat_id only
gemmini_state.igelu_qb = rs2 & 0xFFFFFFFF;
gemmini_state.igelu_qc = (rs2 >> 32) & 0xFFFFFFFF;
auto act_msb = (rs1 >> 16) & 0x1;
gemmini_state.acc_act = static_cast<gemmini_state_t::Activation>((act_msb << 2) | static_cast<int>(gemmini_state.acc_act));
assert(static_cast<int>(gemmini_state.acc_act) <= 4);
if ((rs1 >> 18) & 1) { // q const type = 1
gemmini_state.qln2_inv = (rs1 >> 32) & 0xFFFFFFFF;
} else {
gemmini_state.qln2 = (rs1 >> 32) & 0xFFFFFFFF;
}
}
}
}
void gemmini_t::compute(reg_t a_addr, reg_t bd_addr, bool preload) {
auto a_addr_real = static_cast<uint32_t>(a_addr & 0xFFFFFFFF);
auto bd_addr_real = static_cast<uint32_t>(bd_addr & 0xFFFFFFFF);
const uint16_t a_cols = (a_addr >> addr_len) & 0xFFFF;
const uint16_t a_rows = (a_addr >> (addr_len + 16)) & 0xFFFF;
const uint16_t bd_cols = (bd_addr >> addr_len) & 0xFFFF;
const uint16_t bd_rows = (bd_addr >> (addr_len + 16)) & 0xFFFF;
dprintf("GEMMINI: compute - preload = %d, scratchpad A addr = 0x%08x,"
"scratchpad B addr 0x%08x\n", preload, a_addr_real, bd_addr_real);
// Preload
if (preload) {
dprintf("GEMMINI: compute - PEs after preloading:\n");
for (size_t i = 0; i < DIM; i++) {
for (size_t j = 0; j < DIM; j++) {
// TODO: Handle preloads from accumulator, values are shifted and activated before preload
if (~gemmini_state.preload_sp_addr != 0) {
assert(((gemmini_state.preload_sp_addr >> 30) & 0b11) == 0); // Preloads from accumulator not supported
}
bool preload_tranpose = (gemmini_state.mode == gemmini_state_t::WS) &&
gemmini_state.b_transpose;
size_t r = preload_tranpose ? j : i;
size_t c = preload_tranpose ? i : j;
// In OS mode, pe_state stores the accumulator values
// In WS mode, pe_state stores the persistent weight matrix
if (i < gemmini_state.preload_rows && j < gemmini_state.preload_cols) {
auto preload_value = (~gemmini_state.preload_sp_addr == 0) ? 0 :
gemmini_state.spad.at(gemmini_state.preload_sp_addr + r).at(c);
gemmini_state.pe_state.at(i).at(j) = preload_value;
} else {
gemmini_state.pe_state.at(i).at(j) = 0;
}
#ifdef ELEM_T_IS_FLOAT
dprintf("%f ", gemmini_state.pe_state.at(i).at(j));
#else
dprintf("%d ", gemmini_state.pe_state.at(i).at(j));
#endif
}
dprintf("\n");
}
}
// Compute
// For OS, accumulate the PE results internally in pe_state
// For WS, allocate a new results array which won't affect pe_state, seed the results array with the bias (D) matrix
auto results = std::vector<std::vector<acc_t>>(DIM, std::vector<acc_t>(DIM));
for (size_t i = 0; i < DIM; ++i) {
for (size_t j = 0; j < DIM; ++j) {
if (i < bd_rows && j < bd_cols) {
results.at(i).at(j) = (~bd_addr_real == 0) ? 0 : gemmini_state.spad.at(bd_addr_real + i).at(j);
} else {
results.at(i).at(j) = 0;
}
}
}
for (size_t i = 0; i < DIM; ++i) {
for (size_t j = 0; j < DIM; ++j) {
for (size_t k = 0; k < DIM; ++k) {
elem_t a;
if (~a_addr_real != 0) {
const size_t r = gemmini_state.a_stride * (gemmini_state.a_transpose ? k : i);
const size_t c = gemmini_state.a_transpose ? i : k;
a = i < a_rows && k < a_cols ? gemmini_state.spad.at(a_addr_real + r).at(c) : 0;
}
if (gemmini_state.mode == gemmini_state_t::WS) {
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
results.at(i).at(j) += a * gemmini_state.pe_state.at(k).at(j);
#pragma GCC diagnostic pop
} else {
elem_t b = 0;
if (~bd_addr_real != 0) {
const size_t r = gemmini_state.b_transpose ? j : k;
const size_t c = gemmini_state.b_transpose ? k : j;
b = k < bd_rows && j < bd_cols ? gemmini_state.spad.at(bd_addr_real + r).at(c) : 0;
}
gemmini_state.pe_state.at(i).at(j) += a * b;
}
}
}
}
dprintf("GEMMINI: compute - PEs after matmul:\n");
for (size_t i = 0; i < DIM; ++i) {
for (size_t j = 0; j < DIM; ++j) {
#ifdef ELEM_T_IS_FLOAT
dprintf("%f ", gemmini_state.pe_state.at(i).at(j));
#else
dprintf("%d ", gemmini_state.pe_state.at(i).at(j));
#endif
}
dprintf("\n");
}
// Write results
if (~gemmini_state.output_sp_addr != 0) {
bool const acc = (gemmini_state.output_sp_addr >> 31) & 0x1;
bool const acc_accum = (gemmini_state.output_sp_addr >> 30) & 0x1;
auto const base_sp_addr = gemmini_state.output_sp_addr & 0x1FFFFFFF;
dprintf("GEMMINI: compute - writing results to addr 0x%08x, :\n", gemmini_state.output_sp_addr);
for (size_t i = 0; i < gemmini_state.output_rows; ++i) {
for (size_t j = 0; j < gemmini_state.output_cols; ++j) {
acc_t value = gemmini_state.mode == gemmini_state_t::OS ? gemmini_state.pe_state.at(i).at(j) : results.at(i).at(j);
if (acc) {
output_t shifted = gemmini_state.mode == gemmini_state_t::OS ?
sys_shift(value, gemmini_state.sys_shift) :
sys_shift(value, 0);
if (acc_accum) {
gemmini_state.accumulator.at(base_sp_addr + gemmini_state.c_stride * i).at(j) += value;
} else { // Overwrite
gemmini_state.accumulator.at(base_sp_addr + gemmini_state.c_stride * i).at(j) = value;
}
#ifdef ELEM_T_IS_FLOAT
dprintf("%f ", gemmini_state.accumulator.at(base_sp_addr + gemmini_state.c_stride * i).at(j));
#else
dprintf("%d ", gemmini_state.accumulator.at(base_sp_addr + gemmini_state.c_stride * i).at(j));
#endif
} else { // Move to scratchpad, apply activation along the way
elem_t shifted = gemmini_state.mode == gemmini_state_t::OS ?
sys_shift(value, gemmini_state.sys_shift) :
sys_shift(value, 0);
elem_t activated = apply_activation_sys(shifted);
gemmini_state.spad.at(base_sp_addr + gemmini_state.c_stride * i).at(j) = activated;
#ifdef ELEM_T_IS_FLOAT
dprintf("%f ", gemmini_state.spad.at(base_sp_addr + gemmini_state.c_stride * i).at(j));
#else
dprintf("%d ", gemmini_state.spad.at(base_sp_addr + gemmini_state.c_stride * i).at(j));
#endif
}
}
dprintf("\n");
}
}
}
void gemmini_t::loop_ws(reg_t rs1, reg_t rs2) {
const bool ex_accumulate = rs1 & 1;
const bool full_C = (rs1 >> 1) & 1;
const bool low_D = (rs1 >> 2) & 1;
const uint8_t act = (rs1 >> 8) & 0x7;
const bool a_transpose = rs2 & 1;
const bool b_transpose = (rs2 >> 1) & 1;
uint8_t a_spad_id = (rs1 >> 18) & 0b11;
uint8_t b_spad_id = (rs1 >> 16) & 0b11;
const bool is_resadd = (rs2 >> 2) & 1;
const uint16_t I = gemmini_state.loop_ws_I;
const uint16_t J = gemmini_state.loop_ws_J;
const uint16_t K = gemmini_state.loop_ws_K;
const uint16_t pad_I = gemmini_state.loop_ws_pad_I;
const uint16_t pad_J = gemmini_state.loop_ws_pad_J;
const uint16_t pad_K = gemmini_state.loop_ws_pad_K;
const uint32_t GARBAGE_ADDR = ~0;
const int total_spad_rows = (I * K + K * J) * DIM;
const int total_acc_rows = (I * J) * DIM;
if (total_spad_rows > BANK_NUM * BANK_ROWS / 2 || total_acc_rows > ACC_ROWS / 2) {
printf("LOOP_WS bounds were too large for double-buffering\n");
exit(1);
}
uint32_t A_sp_addr_start = 0;
uint32_t B_sp_addr_start = (BANK_NUM * BANK_ROWS / 2) - K * J * DIM;
const uint32_t D_sp_addr_start = 1 << (ADDR_LEN-1);
const uint32_t C_sp_addr_start = (3 << (ADDR_LEN-2)) | (full_C << (ADDR_LEN-3));
if(a_spad_id == 2) A_sp_addr_start = (BANK_NUM * BANK_ROWS) / 2;
if(b_spad_id == 2) B_sp_addr_start = (BANK_NUM * BANK_ROWS) - K * J * DIM;
if(is_resadd) {
A_sp_addr_start = 1 << (ADDR_LEN - 1);
B_sp_addr_start = 3 << (ADDR_LEN - 2);
for(uint16_t i = 0; i < I; i++){
for(uint16_t j = 0; j < J; j++){
const uint32_t A_sp_addr = A_sp_addr_start + (i*J+j)*DIM;
const uint32_t B_sp_addr = B_sp_addr_start + (i*J+j)*DIM;
const uint32_t C_sp_addr = C_sp_addr_start + (i*J+j)*DIM;
uint64_t dram_addr, cols, rows;
dram_addr = gemmini_state.loop_ws_A + (i*gemmini_state.loop_ws_A_stride + j) * DIM * sizeof(elem_t);
cols = DIM - (j == J-1 ? pad_J : 0);
rows = DIM - (i == I-1 ? pad_I : 0);
mvin(dram_addr, (rows << 48) | (cols << 32) | A_sp_addr, 0);
dram_addr = gemmini_state.loop_ws_B + (i*gemmini_state.loop_ws_B_stride + j) * DIM * sizeof(elem_t);
cols = DIM - (j == J-1 ? pad_J : 0);
rows = DIM - (i == I-1 ? pad_I : 0);
mvin(dram_addr, (rows << 48) | (cols << 32) | B_sp_addr, 1);
if(gemmini_state.loop_ws_C != 0){
const size_t sizeof_C = full_C ? sizeof(acc_t) : sizeof(elem_t);
const uint64_t C_dram_addr = gemmini_state.loop_ws_C +
(i*gemmini_state.loop_ws_C_stride + j) * DIM * sizeof_C;
const uint64_t C_cols = DIM - (j == J - 1 ? pad_J : 0);
const uint64_t C_rows = DIM - (i == I - 1 ? pad_I : 0);
mvout(C_dram_addr, (C_rows << 48) | (C_cols << 32) | C_sp_addr);
}
}
}
return;
}
if (gemmini_state.loop_ws_D != 0) {
for (uint16_t i = 0; i < I; i++) {
for (uint16_t j = 0; j < J; j++) {
const size_t sizeof_D = low_D ? sizeof(elem_t) : sizeof(acc_t);
const uint64_t dram_addr = gemmini_state.loop_ws_D +
(i * gemmini_state.loop_ws_D_stride + j) * DIM * sizeof_D;
const uint64_t sp_addr = D_sp_addr_start + (i*J + j)*DIM;
const uint64_t cols = DIM - (j == J-1 ? pad_J : 0);
const uint64_t rows = DIM - (i == I-1 ? pad_I : 0);
mvin(dram_addr, (rows << 48) | (cols << 32) | sp_addr, 2);
}
}
}
for (uint16_t k = 0; k < K; k++) {
for (uint16_t j = 0; j < J; j++) {
for (uint16_t i = 0; i < I; i++) {
const uint32_t A_sp_addr = a_transpose ? (A_sp_addr_start + (k*I + i)*DIM) :
(A_sp_addr_start + (i*K + k)*DIM);
const uint32_t B_sp_addr = b_transpose ? (B_sp_addr_start + (j*K + k)*DIM) :
(B_sp_addr_start + (k*J + j)*DIM);
const uint32_t C_sp_addr = C_sp_addr_start + (i*J + j)*DIM;
// Mvin A
if (j == 0 && gemmini_state.loop_ws_A != 0) {
uint64_t dram_addr, cols, rows;
if (a_transpose) {
dram_addr = gemmini_state.loop_ws_A +
(k*gemmini_state.loop_ws_A_stride + i) * DIM * sizeof(elem_t);
cols = DIM - (i == I-1 ? pad_I : 0);
rows = DIM - (k == K-1 ? pad_K : 0);
} else {
dram_addr = gemmini_state.loop_ws_A +
(i*gemmini_state.loop_ws_A_stride + k) * DIM * sizeof(elem_t);
cols = DIM - (k == K-1 ? pad_K : 0);
rows = DIM - (i == I-1 ? pad_I : 0);
}
mvin(dram_addr, (rows << 48) | (cols << 32) | A_sp_addr, 0);
}
// Mvin B
if (i == 0 && gemmini_state.loop_ws_B != 0) {
uint64_t dram_addr, cols, rows;
if (b_transpose) {
dram_addr = gemmini_state.loop_ws_B +
(j*gemmini_state.loop_ws_B_stride + k) * DIM * sizeof(elem_t);
cols = DIM - (k == K-1 ? pad_K : 0);
rows = DIM - (j == J-1 ? pad_J : 0);
} else {
dram_addr = gemmini_state.loop_ws_B +
(k*gemmini_state.loop_ws_B_stride + j) * DIM * sizeof(elem_t);
cols = DIM - (j == J-1 ? pad_J : 0);
rows = DIM - (k == K-1 ? pad_K : 0);
}
mvin(dram_addr, (rows << 48) | (cols << 32) | B_sp_addr, 1);
}
// Compute
if(!is_resadd) {
uint32_t pre_sp_addr = i == 0 ? B_sp_addr : GARBAGE_ADDR;
uint32_t out_sp_addr = C_sp_addr;
if (!ex_accumulate && k == 0) {
out_sp_addr &= ~(1 << (ADDR_LEN-2));
}
const uint64_t A_cols = DIM - (k == K - 1 ? pad_K : 0);
const uint64_t A_rows = DIM - (i == I - 1 ? pad_I : 0);
const uint64_t B_cols = DIM - (j == J - 1 ? pad_J : 0);
const uint64_t B_rows = DIM - (k == K - 1 ? pad_K : 0);
const uint64_t C_cols = DIM - (j == J - 1 ? pad_J : 0);
const uint64_t C_rows = DIM - (i == I - 1 ? pad_I : 0);
preload((B_rows << 48) | (B_cols << 32) | pre_sp_addr,
(C_rows << 48) | (C_cols << 32) | out_sp_addr);
compute((A_rows << 48) | (A_cols << 32) | A_sp_addr,
((uint64_t)DIM << 48) | ((uint64_t)DIM << 32) | GARBAGE_ADDR, i == 0);
}
// Move-out C
if (gemmini_state.loop_ws_C != 0 && k == K-1) {
const size_t sizeof_C = full_C ? sizeof(acc_t) : sizeof(elem_t);
if ((act != gemmini_state_t::LAYERNORM) && (act != gemmini_state_t::SOFTMAX)) {
const uint64_t C_dram_addr = gemmini_state.loop_ws_C +
(i*gemmini_state.loop_ws_C_stride + j) * DIM * sizeof_C;
const uint64_t C_cols = DIM - (j == J - 1 ? pad_J : 0);
const uint64_t C_rows = DIM - (i == I - 1 ? pad_I : 0);
mvout(C_dram_addr, (C_rows << 48) | (C_cols << 32) | C_sp_addr);
}
else if (((act == gemmini_state_t::LAYERNORM) || (act == gemmini_state_t::SOFTMAX)) && j == J - 1){
int norm_cmds_size;
uint32_t (*norm_cmds)[2];
uint32_t ln_norm_cmds[][2] = {{1,2},{3,4},{0,0}};
uint32_t sm_norm_cmds[][2] = {{5,5},{6,7},{0,0}};
if (act == gemmini_state_t::LAYERNORM) {
norm_cmds = ln_norm_cmds;
norm_cmds_size = 3;
} else {
norm_cmds = sm_norm_cmds;
norm_cmds_size = 3;
}
const size_t rows = DIM - (i == I-1 ? pad_I : 0);
for (size_t row = 0; row < rows; row += NORM_STAT_IDS) {
const size_t stat_ids = rows - row > NORM_STAT_IDS ?
NORM_STAT_IDS : rows - row;
for (int cmd = 0; cmd < norm_cmds_size; cmd++) {
for (size_t stat_id = 0; stat_id < stat_ids; stat_id++) {
config((1 << 17) | (stat_id << 8) | 3, 0);
const size_t r = row + stat_id;
for (size_t jj = 0; jj < J; jj++) {
uint32_t norm_C_sp_addr = C_sp_addr_start + (i*J + jj)*DIM + r;
if (jj + 1 == J) {
norm_C_sp_addr |= (norm_cmds[cmd][1] << 26); // Final mean/inv-std-dev calculation
} else {
norm_C_sp_addr |= (norm_cmds[cmd][0] << 26); // Accumulate sum/variance
}
const uint64_t C_dram_addr = gemmini_state.loop_ws_C +
(i*gemmini_state.loop_ws_C_stride + jj) * DIM * sizeof_C +
r * gemmini_state.loop_ws_C_stride * sizeof_C;
const size_t cols = DIM - (jj + 1 == J ? pad_J : 0);
// gemmini_extended_mvout(C_dram_addr, norm_C_sp_addr, cols, 1);
mvout(C_dram_addr, ((uint64_t)1 << 48) | (cols << 32) | norm_C_sp_addr);
}
}
}
}
}
}
}
}
}
}
void gemmini_t::compute_cisc() {
// `compute` performs Gemmini's core function - matrix multiply-add -
// without referencing any underlying hardware detail.
//
// * Operands A, B, and D are loaded from memory
// * Multiply, add, activation, and any requested shifts are performed
// * Result D is written back to memory
//
// These computations are made independent of systolic array sizes,
// scratchpad-memory sizes,
// and any other microarchitectural detail (other than datatypes).
// Load operands from memory
auto A = read_matrix_from_dram<elem_t>(gemmini_state.a_addr,
gemmini_state.m,
gemmini_state.k,
false, false);
auto B = read_matrix_from_dram<elem_t>(gemmini_state.b_addr,
gemmini_state.k,
gemmini_state.n,
false, false);
auto D = read_matrix_from_dram<acc_t>(gemmini_state.d_addr,
gemmini_state.m,
gemmini_state.n,
true,
gemmini_state.repeating_bias);
// Initialize an accumulator/ result
auto C = matrix_zeroes<elem_t>(gemmini_state.m, gemmini_state.n);
// Multiply & apply activation
for (size_t i=0; i<gemmini_state.m; i++) {
for (size_t j=0; j<gemmini_state.n; j++) {
acc_t value = D->at(i).at(j);
for (size_t k=0; k<gemmini_state.k; k++) {
value += ((acc_t)A->at(i).at(k)) * ((acc_t)B->at(k).at(j));
}
elem_t shifted = acc_scale(value,
gemmini_state.acc_shift);
elem_t activated = apply_activation_acc(shifted);
C->at(i).at(j) = activated;
}
}
// Write back to memory
for (size_t i = 0; i < gemmini_state.m; i++) {
auto const dram_row_addr = gemmini_state.c_addr +
i*sizeof(elem_t)*gemmini_state.n;
for (size_t j = 0; j < gemmini_state.n; j++) {
auto const dram_byte_addr = dram_row_addr + j*sizeof(elem_t);
#ifdef ELEM_T_IS_FLOAT
write_to_dram<elem_t_bits>(dram_byte_addr, C->at(i).at(j));
#else
write_to_dram<elem_t>(dram_byte_addr, C->at(i).at(j));
#endif
}
}
}
// Union for counter operation argument extraction
union counter_op_param {
reg_t arg;
struct {
uint64_t counter_reset:1;
uint64_t snapshot_reset:1;
uint64_t take_snapshot:1;
uint64_t change_config:1;
uint64_t counter_index:3;
uint64_t padding2:5;
uint64_t counter_addr:6;
uint64_t padding1:13;
uint64_t external_counter:1;
uint64_t padding0:32;
};
};
reg_t gemmini_t::counter_operation(reg_t rs1) {
counter_op_param decoder;
decoder.arg = rs1;
if (decoder.counter_reset) {
for (size_t i = 0; i < NUM_COUNTERS; i++)
gemmini_state.counter_val[i] = 0;
gemmini_state.op_in_progress = false;
}
if (decoder.snapshot_reset) gemmini_state.snapshot_enable = false;
if (decoder.take_snapshot) {
gemmini_state.snapshot_enable = true;
for (size_t i = 0; i < NUM_COUNTERS; i++) {
if (gemmini_state.counter_external_flag[i])
gemmini_state.counter_snapshot_val[i] = gemmini_state.counter_external[gemmini_state.counter_config[i]];
else
gemmini_state.counter_snapshot_val[i] = gemmini_state.counter_val[i];
}
}
if (decoder.change_config) {
gemmini_state.counter_config[decoder.counter_index] = decoder.counter_addr;
gemmini_state.counter_val[decoder.counter_index] = 0;
gemmini_state.counter_external_flag[decoder.counter_index] = decoder.external_counter;
}
if (gemmini_state.snapshot_enable)
return gemmini_state.counter_snapshot_val[decoder.counter_index];
else if (gemmini_state.counter_external_flag[decoder.counter_index])
return gemmini_state.counter_external[gemmini_state.counter_config[decoder.counter_index]];
else
return gemmini_state.counter_val[decoder.counter_index];
}
void gemmini_t::loop_ws_config_bounds(reg_t rs1, reg_t rs2) {