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[SYCL] supprt Flash Attention for fp32/fp16/Q4/Q5/Q8 (#20190)

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* support flash-attention for fp32/fp16/Q4/Q5/Q8

* rm warining

* update for JIT
This commit is contained in:
Neo Zhang
2026-03-08 12:00:07 +08:00
committed by GitHub
parent c5a778891b
commit 213c4a0b81
65 changed files with 20091 additions and 8593 deletions
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ggml/src/ggml-sycl/convert.cpp
+69 -1
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@@ -482,6 +482,63 @@ static void dequantize_row_mxfp4_sycl(const void * vx, dst_t * y, const int64_t
});
}
template <int qk, int qr, dequantize_kernel_t dequantize_kernel, typename dst_t>
static void dequantize_block_nc(const void * __restrict__ vx, dst_t * __restrict__ y,
const int64_t ne00, const int64_t ne01, const int64_t ne02,
const int64_t s01, const int64_t s02, const int64_t s03) {
auto item_ct1 = sycl::ext::oneapi::this_work_item::get_nd_item<3>();
const int64_t i00 = 2 * (int64_t(item_ct1.get_local_range(2)) * item_ct1.get_group(2) + item_ct1.get_local_id(2));
if (i00 >= ne00) {
return;
}
const int64_t i01 = item_ct1.get_group(1);
const int64_t i02 = item_ct1.get_group(0) % ne02;
const int64_t i03 = item_ct1.get_group(0) / ne02;
const int64_t ibx0 = i03*s03 + i02*s02 + i01*s01;
const int64_t ib = ibx0 + i00/qk; // block index
const int64_t iqs = (i00%qk)/qr; // quant index
const int64_t iybs = i00 - i00%qk; // y block start index
const int64_t y_offset = qr == 1 ? 1 : qk/2;
// dequantize
#ifdef GGML_SYCL_F16
sycl::half2 v;
#else
sycl::float2 v;
#endif
dequantize_kernel(vx, ib, iqs, v);
const int64_t iy0 = ((i03*ne02 + i02)*ne01 + i01)*ne00 + iybs + iqs;
y[iy0 + 0] = ggml_sycl_cast<dst_t>(v.x());
y[iy0 + y_offset] = ggml_sycl_cast<dst_t>(v.y());
}
template <int qk, int qr, dequantize_kernel_t dequantize_kernel, typename dst_t>
static void dequantize_block_nc_sycl(const void * vx,
dst_t * y,
const int64_t ne00,
const int64_t ne01,
const int64_t ne02,
const int64_t ne03,
const int64_t s01,
const int64_t s02,
const int64_t s03,
dpct::queue_ptr stream) {
const dpct::dim3 num_blocks((ne00 + 2 * SYCL_DEQUANTIZE_BLOCK_SIZE - 1) / (2 * SYCL_DEQUANTIZE_BLOCK_SIZE), ne01,
ne02 * ne03);
stream->parallel_for(sycl::nd_range<3>(num_blocks * sycl::range<3>(1, 1, SYCL_DEQUANTIZE_BLOCK_SIZE),
sycl::range<3>(1, 1, SYCL_DEQUANTIZE_BLOCK_SIZE)),
[=](sycl::nd_item<3> item_ct1) {
GGML_UNUSED(item_ct1);
dequantize_block_nc<qk, qr, dequantize_kernel>(vx, y, ne00, ne01, ne02, s01, s02, s03);
});
}
template <typename src_t, typename dst_t>
static void convert_unary_nc(const void * __restrict__ vx, dst_t * __restrict__ y, const int64_t ne00, const int64_t ne01,
const int64_t ne02, const int64_t s01, const int64_t s02, const int64_t s03,
@@ -662,7 +719,8 @@ to_fp32_sycl_t ggml_get_to_fp32_sycl(ggml_type type, ggml_tensor *dst) {
}
}
to_fp16_nc_sycl_t get_to_fp16_nc_sycl(ggml_type type) {
to_fp16_nc_sycl_t ggml_get_to_fp16_nc_sycl(ggml_type type) {
switch (type) {
case GGML_TYPE_F32:
return convert_unary_nc_sycl<float>;
@@ -670,6 +728,16 @@ to_fp16_nc_sycl_t get_to_fp16_nc_sycl(ggml_type type) {
case GGML_TYPE_BF16:
return convert_unary_nc_sycl<sycl::ext::oneapi::bfloat16>;
#endif
case GGML_TYPE_Q4_0:
return dequantize_block_nc_sycl<QK4_0, QR4_0, dequantize_q4_0>;
case GGML_TYPE_Q4_1:
return dequantize_block_nc_sycl<QK4_1, QR4_1, dequantize_q4_1>;
case GGML_TYPE_Q5_0:
return dequantize_block_nc_sycl<QK5_0, QR5_0, dequantize_q5_0>;
case GGML_TYPE_Q5_1:
return dequantize_block_nc_sycl<QK5_1, QR5_1, dequantize_q5_1>;
case GGML_TYPE_Q8_0:
return dequantize_block_nc_sycl<QK8_0, QR8_0, dequantize_q8_0>;
default:
return nullptr;
}