CUDA: add set

ggml/src/ggml-cuda/ggml-cuda.cu

@@ -44,6 +44,7 @@
 #include "ggml-cuda/upscale.cuh"
 #include "ggml-cuda/wkv.cuh"
 #include "ggml-cuda/gla.cuh"
+#include "ggml-cuda/set.cuh"
 #include "ggml-cuda/set-rows.cuh"
 #include "ggml.h"
 
@@ -2233,6 +2234,9 @@ static bool ggml_cuda_compute_forward(ggml_backend_cuda_context & ctx, struct gg
         case GGML_OP_GET_ROWS_BACK:
             ggml_cuda_op_get_rows_back(ctx, dst);
             break;
+        case GGML_OP_SET:
+            ggml_cuda_op_set(ctx, dst);
+            break;
         case GGML_OP_SET_ROWS:
             ggml_cuda_op_set_rows(ctx, dst);
             break;
@@ -3275,6 +3279,10 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
             {
                 return op->type == GGML_TYPE_F32 && op->src[0]->type == GGML_TYPE_F32 && op->ne[2] == 1 && op->ne[3] == 1;
             } break;
+        case GGML_OP_SET:
+            {
+                return op->type == GGML_TYPE_F32;
+            } break;
         case GGML_OP_SET_ROWS:
             {
                 return (op->type == GGML_TYPE_F32 || op->type == GGML_TYPE_F16 || op->type == GGML_TYPE_BF16 ||

ggml/src/ggml-cuda/set.cu

@@ -0,0 +1,82 @@
+#include "ggml-cuda/common.cuh"
+#include "set.cuh"
+
+static __global__ void set_f32_cuda(const float * __restrict__ src1,
+                                    float * __restrict__ dst,
+                                    const size_t ne10,
+                                    const size_t ne11,
+                                    const size_t ne12,
+                                    const size_t ne13,
+                                    const size_t nb10,
+                                    const size_t nb11,
+                                    const size_t nb12,
+                                    const size_t nb13,
+                                    const size_t nb0,
+                                    const size_t nb1,
+                                    const size_t nb2,
+                                    const size_t nb3,
+                                    const size_t offset
+
+) {
+    const size_t total = ne10 * ne11 * ne12 * ne13;
+    const size_t gid   = blockIdx.x * blockDim.x + threadIdx.x;
+    if (gid >= total) {
+        return;
+    }
+
+    size_t tmp = gid;
+
+    const size_t i0 = tmp % ne10;
+    tmp /= ne10;
+    const size_t i1 = tmp % ne11;
+    tmp /= ne11;
+    const size_t i2 = tmp % ne12;
+    tmp /= ne12;
+    const size_t i3 = tmp;
+
+    size_t dst_offset  = offset + i0 * nb0 + i1 * nb1 + i2 * nb2 + i3 * nb3;
+    size_t src1_offset = i0 * nb10 + i1 * nb11 + i2 * nb12 + i3 * nb13;
+
+    *((float *) ((char *) dst + dst_offset)) = *((const float *) ((const char *) src1 + src1_offset));
+}
+
+void ggml_cuda_op_set(ggml_backend_cuda_context & ctx, ggml_tensor * dst) {
+    // nb0 is implicitly element_size because src0 and dst are contiguous
+    const int32_t nb1     = dst->op_params[0];
+    const int32_t nb2     = dst->op_params[1];
+    const int32_t nb3     = dst->op_params[2];
+    const int32_t offset  = dst->op_params[3];
+    const bool    inplace = dst->op_params[4];
+
+    const ggml_tensor * src0 = dst->src[0];
+    const ggml_tensor * src1 = dst->src[1];
+
+    GGML_ASSERT(ggml_are_same_shape(src0, dst));
+
+    // TODO: support more dtypes.
+    GGML_ASSERT(src0->type == GGML_TYPE_F32);
+    GGML_ASSERT(src1->type == GGML_TYPE_F32);
+    GGML_ASSERT(dst->type == GGML_TYPE_F32);
+
+    GGML_TENSOR_BINARY_OP_LOCALS01;
+    const int nb0 = ggml_element_size(dst);
+
+    const float * src0_d = (const float *) src0->data;
+    const float * src1_d = (const float *) src1->data;
+    float *       dst_d  = (float *) dst->data;
+
+    cudaStream_t stream = ctx.stream();
+
+    if (!inplace) {
+        // copy whole src0 -> dst.
+        CUDA_CHECK(cudaMemcpyAsync(dst_d, src0_d, ggml_nbytes(dst), cudaMemcpyDeviceToDevice, stream));
+    }
+
+    // set: src1 -> dst
+
+    const size_t total      = ne10 * ne11 * ne12 * ne13;
+    const size_t num_blocks = (total + CUDA_SET_BLOCK_SIZE - 1) / CUDA_SET_BLOCK_SIZE;
+
+    set_f32_cuda<<<num_blocks, CUDA_SET_BLOCK_SIZE, 0, stream>>>(
+        src1_d, dst_d, ne10, ne11, ne12, ne13, nb10, nb11, nb12, nb13, nb0, nb1, nb2, nb3, offset);
+}

ggml/src/ggml-cuda/set.cuh

@@ -0,0 +1,7 @@
+#pragma once
+
+#include "common.cuh"
+
+#define CUDA_SET_BLOCK_SIZE 256
+
+void ggml_cuda_op_set(ggml_backend_cuda_context & ctx, ggml_tensor * dst);