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1 files changed, 55 insertions, 0 deletions

diff --git a/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/sum_rows.wgsl b/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/sum_rows.wgsl
new file mode 100644
index 0000000..6ea2de9
--- /dev/null
+++ b/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/sum_rows.wgsl
@@ -0,0 +1,55 @@
+@group(0) @binding(0)
+var<storage, read_write> src: array<f32>;
+
+@group(0) @binding(1)
+var<storage, read_write> dst: array<f32>;
+
+struct Params {
+    offset_src: u32, // in elements
+    offset_dst: u32, // in elements
+
+    // Strides (in elements)
+    stride_src1: u32,
+    stride_src2: u32,
+    stride_src3: u32,
+
+    ne0: u32,
+    ne1: u32,
+    ne2: u32
+};
+
+@group(0) @binding(2)
+var<uniform> params: Params;
+
+var<workgroup> shared_sum: array<f32, WG_SIZE>;
+
+@compute @workgroup_size(WG_SIZE)
+fn main(@builtin(workgroup_id) wid: vec3<u32>,
+        @builtin(local_invocation_id) lid: vec3<u32>) {
+
+    var i = wid.x;
+    let i3 = i / (params.ne2 * params.ne1);
+    i = i % (params.ne2 * params.ne1);
+    let i2 = i / params.ne1;
+    let i1 = i % params.ne1;
+    let i_src_row = params.offset_src + i3 * params.stride_src3 + i2 * params.stride_src2 + i1 * params.stride_src1;
+    var local_sum: f32 = 0.0;
+    for (var col = lid.x; col < params.ne0; col += WG_SIZE) {
+        local_sum += src[i_src_row + col];
+    }
+    shared_sum[lid.x] = local_sum;
+    workgroupBarrier();
+    // reduce within workgroup
+    var offset: u32 = WG_SIZE >> 1;
+    while (offset > 0) {
+        if (lid.x < offset) {
+            shared_sum[lid.x] = shared_sum[lid.x] + shared_sum[lid.x + offset];
+        }
+        workgroupBarrier();
+        offset >>= 1;
+    }
+
+    if (lid.x == 0) {
+        dst[params.offset_dst + wid.x] = shared_sum[0];
+    }
+}