ikawrakow/ik_llama.cpp
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iq1_bn(Metal): 686 -> 702 t/s for PP-512

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Iwan Kawrakow
2024-10-26 10:41:14 +02:00
parent 885a48b788
commit ca8f9d7e7e
1 changed files with 13 additions and 12 deletions
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25
ggml/src/ggml-metal.metal
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@@ -7476,22 +7476,23 @@ template <typename type4x4>
void dequantize_iq1_bn(device const block_iq1_bn * xb, short il, thread type4x4 & reg) {
// il is in 0...3
constexpr uint8_t k_mult[5] = {81, 27, 9, 3, 1};
constexpr uint16_t k_mult[5] = {81, 27, 9, 3, 1};
constexpr half k_values[3] = {-1.h, 0.h, 1.h};
int i = 0;
for (int k = 0; k < 3; ++k) {
uint8_t q = xb->ql[3*il + k];
for (int j = 0; j < 5; ++j) {
uint8_t v = k_mult[j]*q;
int8_t vs = 3*v >> 8;
//int8_t vs = (v + (v >> 1)) >> 7;
reg[i/4][i%4] = vs - 1;
++i;
uint16_t q = xb->ql[3*il + k];
int i = 5*k + 4;
for (int j = 4; j >= 0; --j) {
uint16_t v = q & 0xff;
v += v << 1;
reg[i/4][i%4] = k_values[v >> 8];
q += q << 1;
--i;
}
}
uint8_t v = k_mult[il]*xb->extra;
int8_t vs = 3*v >> 8; //(v + (v >> 1)) >> 7;
reg[3][3] = vs - 1;
uint16_t v = (k_mult[il]*xb->extra) & 0xff;
v += v << 1;
reg[3][3] = k_values[v >> 8];
}
template <typename type4x4>