1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
#include <BinSearch.h>
#include <pthread.h>
#include <common.h>
using namespace BinSearch;
void dequantize_cpu(float *code, unsigned char *A, float *absmax, float *out, int n) {
for (int block_idx = 0; block_idx < n; block_idx += BLOCK_SIZE) {
int valid_items = n - block_idx >= BLOCK_SIZE ? BLOCK_SIZE : n - block_idx;
int block_end = block_idx + valid_items;
for (int i = block_idx; i < block_end; i++)
out[i] = code[A[i]] * absmax[block_idx / BLOCK_SIZE];
}
}
void quantize_cpu(float *code, float *A, float *absmax, unsigned char *out, int n) {
// the default code is has range [-0.993, 1.0] which can cause an error in the binary search algorithm used below
code[0] = -1.0f;
int num_blocks = n / BLOCK_SIZE;
num_blocks += n % BLOCK_SIZE == 0 ? 0 : 1;
pthread_t *threads = (pthread_t *) malloc(sizeof(pthread_t) * num_blocks);
struct quantize_block_args **args = (quantize_block_args **) malloc(num_blocks * sizeof(quantize_block_args *));
for (int i = 0; i < num_blocks; i++)
args[i] = (quantize_block_args *) malloc(sizeof(quantize_block_args));
const uint32 elements_code = 256;
BinAlgo<Scalar, float, Direct2> bin_searcher(code, elements_code);
for (int block_idx = 0; block_idx < n; block_idx += BLOCK_SIZE) {
int valid_items = n - block_idx >= BLOCK_SIZE ? BLOCK_SIZE : n - block_idx;
int block_end = block_idx + valid_items;
struct quantize_block_args *arg = args[block_idx / BLOCK_SIZE];
arg->bin_searcher = &bin_searcher;
arg->code = code;
arg->A = A;
arg->absmax = absmax;
arg->out = out;
arg->block_end = block_end;
arg->block_idx = block_idx;
arg->threadidx = block_idx / BLOCK_SIZE;
pthread_create(&threads[block_idx / BLOCK_SIZE], NULL, &quantize_block, (void *) arg);
}
for (int i = 0; i < num_blocks; i++)
int err = pthread_join(threads[i], NULL);
free(threads);
for (int i = 0; i < num_blocks; i++)
free(args[i]);
free(args);
}
|
