15#include "../../deps/riscv-opcodes/encoding.h"
19#define SNRT_BROADCAST_MASK ((SNRT_CLUSTER_NUM - 1) * SNRT_CLUSTER_OFFSET)
28inline volatile uint32_t *
snrt_mutex() {
return &_snrt_mutex; }
42 " amoswap.w.aq t0,t0,(%0) # t0 = oldlock & lock = 1\n"
43 " bnez t0,1b # Retry if previously set)\n"
61 " amoswap.w.aq t0,t0,(%0) # t0 = oldlock & lock = 1\n"
62 " bnez t0,2b # Retry if previously set)\n"
72 asm volatile(
"amoswap.w.rl x0,x0,(%0) # Release lock by storing 0\n"
80inline void snrt_wake_all(uint32_t core_mask) {
81#ifdef SNRT_SUPPORTS_MULTICAST
87 if (snrt_cluster_num() > 0) {
88 volatile snitch_cluster_t *cluster;
89 if (snrt_cluster_idx() == 0)
90 cluster = snrt_cluster(1);
92 cluster = snrt_cluster(0);
93#pragma clang diagnostic push
94#pragma clang diagnostic ignored "-Waddress-of-packed-member"
95 uint32_t *addr = (uint32_t *)&(cluster->peripheral_reg.cl_clint_set.w);
96#pragma clang diagnostic pop
102 for (
int i = 0; i < snrt_cluster_num(); i++) {
103 if (snrt_cluster_idx() != i) {
104 snrt_cluster(i)->peripheral_reg.cl_clint_set.f.cl_clint_set =
117 asm volatile(
"csrr x0, 0x7C2" :::
"memory");
126static inline void snrt_inter_cluster_barrier() {
129 __atomic_add_fetch(&(_snrt_barrier.cnt), 1, __ATOMIC_RELAXED);
134 if (cnt == snrt_cluster_num()) {
135 _snrt_barrier.cnt = 0;
137 snrt_wake_all(1 << snrt_cluster_core_idx());
158 if (snrt_is_dm_core()) {
159 snrt_inter_cluster_barrier();
174 uint32_t prev_it = barr->iteration;
175 uint32_t cnt = __atomic_add_fetch(&barr->cnt, 1, __ATOMIC_RELAXED);
180 __atomic_add_fetch(&barr->iteration, 1, __ATOMIC_RELAXED);
183 while (prev_it == barr->iteration)
204 uint32_t *cluster_result = &(cls()->reduction);
205 uint32_t tmp = __atomic_fetch_add(cluster_result, value, __ATOMIC_RELAXED);
212 if (snrt_is_dm_core()) {
213 __atomic_add_fetch(&_reduction_result, *cluster_result,
215 snrt_inter_cluster_barrier();
216 *cluster_result = _reduction_result;
219 return *cluster_result;
241 if (snrt_cluster_num() > 1) {
243 int num_levels = ceil(log2(snrt_cluster_num()));
244 for (
unsigned int level = 0; level < num_levels; level++) {
249 uint32_t is_active = (snrt_cluster_idx() % (1 << level)) == 0;
250 uint32_t is_sender = (snrt_cluster_idx() % (1 << (level + 1))) != 0;
254 if (is_active && is_sender) {
255 if (!snrt_is_compute_core()) {
256 uint64_t dst = (uint64_t)dst_buffer -
257 (1 << level) * SNRT_CLUSTER_OFFSET;
258 snrt_dma_start_1d(dst, (uint64_t)src_buffer,
259 len *
sizeof(
double));
268 if (is_active && !is_sender) {
270 if (snrt_is_compute_core()) {
271 uint32_t items_per_core =
272 len / snrt_cluster_compute_core_num();
273 uint32_t core_offset =
274 snrt_cluster_core_idx() * items_per_core;
275 for (uint32_t i = 0; i < items_per_core; i++) {
276 uint32_t abs_i = core_offset + i;
277 src_buffer[abs_i] += dst_buffer[abs_i];
299 asm volatile(
"mv %0, %0" :
"+r"(val)::);
Definition sync_decls.h:9
void snrt_partial_barrier(snrt_barrier_t *barr, uint32_t n)
Generic software barrier.
Definition sync.h:172
void snrt_enable_multicast(uint32_t mask)
Enable LSU multicast.
Definition sync.h:313
void snrt_mutex_ttas_acquire(volatile uint32_t *pmtx)
Acquire a mutex, blocking.
Definition sync.h:54
void snrt_mutex_acquire(volatile uint32_t *pmtx)
Acquire a mutex, blocking.
Definition sync.h:38
volatile uint32_t * snrt_mutex()
Get a pointer to a mutex variable.
Definition sync.h:28
void snrt_wait_writeback(uint32_t val)
Ensure value is written back to the register file.
Definition sync.h:298
uint32_t snrt_global_all_to_all_reduction(uint32_t value)
Perform a global sum reduction, blocking.
Definition sync.h:202
void snrt_global_barrier()
Synchronize all Snitch cores.
Definition sync.h:154
void snrt_cluster_hw_barrier()
Synchronize cores in a cluster with a hardware barrier, blocking.
Definition sync.h:116
void snrt_mutex_release(volatile uint32_t *pmtx)
Release a previously-acquired mutex.
Definition sync.h:71
void snrt_disable_multicast()
Disable LSU multicast.
Definition sync.h:318
void snrt_global_reduction_dma(double *dst_buffer, double *src_buffer, size_t len)
Perform a sum reduction among clusters, blocking.
Definition sync.h:238