1 files changed, 345 insertions, 0 deletions

diff --git a/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/soft_max.tmpl.wgsl b/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/soft_max.tmpl.wgsl
new file mode 100644
index 0000000..c74dc4c
--- /dev/null
+++ b/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/soft_max.tmpl.wgsl
@@ -0,0 +1,345 @@
+#define(VARIANTS)
+[
+  {
+    "SHADER_NAME": "soft_max_f32",
+    "DECLS": ["BASE_BINDINGS", "NOT_INPLACE", "NO_MASK", "NO_SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_inplace",
+    "DECLS": ["BASE_BINDINGS_INPLACE", "INPLACE", "NO_MASK", "NO_SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_sink",
+    "DECLS": ["SINK_BINDINGS", "NOT_INPLACE", "NO_MASK", "SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_sink_inplace",
+    "DECLS": ["SINK_BINDINGS_INPLACE", "INPLACE", "NO_MASK", "SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f32",
+    "REPLS": {
+      "MASK_TYPE" : "f32",
+    },
+    "DECLS": ["MASK_BINDINGS", "NOT_INPLACE", "MASK", "NO_SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f32_inplace",
+    "REPLS": {
+      "MASK_TYPE" : "f32",
+    },
+    "DECLS": ["MASK_BINDINGS_INPLACE", "INPLACE", "MASK", "NO_SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f16",
+    "REPLS": {
+      "MASK_TYPE" : "f16",
+    },
+    "DECLS": ["MASK_BINDINGS", "NOT_INPLACE", "MASK", "NO_SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f16_inplace",
+    "REPLS": {
+      "MASK_TYPE" : "f16",
+    },
+    "DECLS": ["MASK_BINDINGS_INPLACE", "INPLACE", "MASK", "NO_SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f32_sink",
+    "REPLS": {
+      "MASK_TYPE" : "f32",
+    },
+    "DECLS": ["MASK_SINK_BINDINGS", "NOT_INPLACE", "MASK", "SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f32_sink_inplace",
+    "REPLS": {
+      "MASK_TYPE" : "f32",
+    },
+    "DECLS": ["MASK_SINK_BINDINGS_INPLACE", "INPLACE", "MASK", "SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f16_sink",
+    "REPLS": {
+      "MASK_TYPE" : "f16",
+    },
+    "DECLS": ["MASK_SINK_BINDINGS", "NOT_INPLACE", "MASK", "SINK"]
+  },
+  {
+    "SHADER_NAME": "soft_max_f32_mask_f16_sink_inplace",
+    "REPLS": {
+      "MASK_TYPE" : "f16",
+    },
+    "DECLS": ["MASK_SINK_BINDINGS_INPLACE", "INPLACE", "MASK", "SINK"]
+  }
+]
+#end(VARIANTS)
+
+#define(DECLS)
+
+#decl(BASE_BINDINGS)
+@group(0) @binding(1)
+var<storage, read_write> dst: array<f32>;
+
+@group(0) @binding(2)
+var<uniform> params: Params;
+#enddecl(BASE_BINDINGS)
+
+#decl(BASE_BINDINGS_INPLACE)
+@group(0) @binding(1)
+var<uniform> params: Params;
+#enddecl(BASE_BINDINGS_INPLACE)
+
+#decl(SINK_BINDINGS)
+@group(0) @binding(1)
+var<storage, read_write> sinks: array<f32>;
+
+@group(0) @binding(2)
+var<storage, read_write> dst: array<f32>;
+
+@group(0) @binding(3)
+var<uniform> params: Params;
+#enddecl(SINK_BINDINGS)
+
+#decl(SINK_BINDINGS_INPLACE)
+@group(0) @binding(1)
+var<storage, read_write> sinks: array<f32>;
+
+@group(0) @binding(2)
+var<uniform> params: Params;
+#enddecl(SINK_BINDINGS_INPLACE)
+
+#decl(MASK_BINDINGS)
+@group(0) @binding(1)
+var<storage, read_write> mask: array<{{MASK_TYPE}}>;
+
+@group(0) @binding(2)
+var<storage, read_write> dst: array<f32>;
+
+@group(0) @binding(3)
+var<uniform> params: Params;
+#enddecl(MASK_BINDINGS)
+
+#decl(MASK_BINDINGS_INPLACE)
+@group(0) @binding(1)
+var<storage, read_write> mask: array<{{MASK_TYPE}}>;
+
+@group(0) @binding(2)
+var<uniform> params: Params;
+#enddecl(MASK_BINDINGS_INPLACE)
+
+#decl(MASK_SINK_BINDINGS)
+@group(0) @binding(1)
+var<storage, read_write> mask: array<{{MASK_TYPE}}>;
+
+@group(0) @binding(2)
+var<storage, read_write> sinks: array<f32>;
+
+@group(0) @binding(3)
+var<storage, read_write> dst: array<f32>;
+
+@group(0) @binding(4)
+var<uniform> params: Params;
+#enddecl(MASK_SINK_BINDINGS)
+
+#decl(MASK_SINK_BINDINGS_INPLACE)
+@group(0) @binding(1)
+var<storage, read_write> mask: array<{{MASK_TYPE}}>;
+
+@group(0) @binding(2)
+var<storage, read_write> sinks: array<f32>;
+
+@group(0) @binding(3)
+var<uniform> params: Params;
+#enddecl(MASK_SINK_BINDINGS_INPLACE)
+
+#decl(NOT_INPLACE)
+fn inter_value(i: u32) -> f32 {
+    return dst[i];
+}
+
+fn update(i: u32, val: f32) {
+    dst[i] = val;
+}
+#enddecl(NOT_INPLACE)
+
+#decl(INPLACE)
+fn inter_value(i: u32) -> f32 {
+    return src[i];
+}
+
+fn update(i: u32, val: f32) {
+    src[i] = val;
+}
+#enddecl(INPLACE)
+
+#decl(NO_MASK)
+fn mask_val(i: u32) -> f32 {
+    return 0.0;
+}
+#enddecl(NO_MASK)
+
+#decl(MASK)
+fn mask_val(i: u32) -> f32 {
+    return f32(mask[i]);
+}
+#enddecl(MASK)
+
+#decl(NO_SINK)
+fn lower_max_bound(i2: u32) -> f32 {
+    return -1e30;
+}
+
+fn add_sinks(val: f32, i2: u32, max_val: f32) -> f32 {
+    return val;
+}
+#enddecl(NO_SINK)
+
+#decl(SINK)
+fn lower_max_bound(i2: u32) -> f32 {
+    return sinks[params.offset_sinks + i2];
+}
+
+fn add_sinks(val: f32, i2: u32, max_val: f32) -> f32 {
+    return val + exp(sinks[params.offset_sinks + i2] - max_val);
+}
+#enddecl(SINK)
+
+#end(DECLS)
+
+#define(SHADER)
+enable f16;
+
+struct Params {
+    offset_src0: u32,
+    offset_src1: u32,
+    offset_sinks: u32,
+    offset_dst: u32,
+
+    // Strides (in elements)
+    stride_src01: u32,
+    stride_src02: u32,
+    stride_src03: u32,
+
+    stride_src11: u32,
+    stride_src12: u32,
+    stride_src13: u32,
+
+    stride_dst1: u32,
+    stride_dst2: u32,
+    stride_dst3: u32,
+
+    // shape of src0/dst
+    ne: u32,
+    ne0: u32,
+    ne1: u32,
+    ne2: u32,
+
+    // shape of src1
+    ne12: u32,
+    ne13: u32,
+
+    scale: f32,
+    max_bias: f32,
+    n_head_log2: f32,
+    m0: f32,
+    m1: f32,
+};
+
+@group(0) @binding(0)
+var<storage, read_write> src: array<f32>;
+
+DECLS
+
+const CACHE_SIZE: u32 = 16;
+
+override wg_size: u32;
+var<workgroup> scratch: 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_src0_row = params.offset_src0 + i3 * params.stride_src03 + i2 * params.stride_src02 + i1 * params.stride_src01;
+    let i_src1_row = params.offset_src1 + (i3 % params.ne13) * params.stride_src13 + (i2 % params.ne12) * params.stride_src12 + i1 * params.stride_src11;
+    let i_dst_row = params.offset_dst + i3 * params.stride_dst3 + i2 * params.stride_dst2 + i1 * params.stride_dst1;
+    let elems = (params.ne0 + wg_size - 1) / wg_size;
+
+    let head = f32(i2);
+    let slope = select(1, select(pow(params.m1, 2 * (head - params.n_head_log2) + 1), pow(params.m0, head + 1), head < params.n_head_log2), params.max_bias > 0);
+
+    var cache: array<f32, CACHE_SIZE>;
+
+    var max_val = lower_max_bound(i2);
+    var col = lid.x;
+    for (var j: u32 = 0; j < elems; j++) {
+        if (col >= params.ne0) {
+            break;
+        }
+        let val = src[i_src0_row + col] * params.scale + slope * mask_val(i_src1_row + col);
+        max_val = max(max_val, val);
+        if (col < CACHE_SIZE) {
+            cache[col] = val;
+        }
+        col += wg_size;
+    }
+
+    scratch[lid.x] = max_val;
+    workgroupBarrier();
+    var offset = wg_size / 2;
+    while (offset > 0) {
+        if (lid.x < offset) {
+            scratch[lid.x] = max(scratch[lid.x], scratch[lid.x + offset]);
+        }
+        offset = offset / 2;
+        workgroupBarrier();
+    }
+    let row_max = scratch[0];
+    workgroupBarrier();
+
+    var sum = 0.0f;
+    col = lid.x;
+    for (var j: u32 = 0; j < elems; j++) {
+        if (col >= params.ne0) {
+            break;
+        }
+        let val = select(src[i_src0_row + col] * params.scale + slope * mask_val(i_src1_row + col),
+                         cache[col], col < CACHE_SIZE);
+        let ex = exp(val - row_max);
+        sum += ex;
+        if (col < CACHE_SIZE) {
+            cache[col] = ex;
+        } else {
+            update(i_dst_row + col, ex);
+        }
+        col += wg_size;
+    }
+
+    scratch[lid.x] = sum;
+    workgroupBarrier();
+    offset = wg_size / 2;
+    while (offset > 0) {
+        if (lid.x < offset) {
+            scratch[lid.x] += scratch[lid.x + offset];
+        }
+        offset = offset / 2;
+        workgroupBarrier();
+    }
+    let row_sum = add_sinks(scratch[0], i2, row_max);
+
+    let sum_recip = 1.0 / row_sum;
+    col = lid.x;
+    for  (var j: u32 = 0; j < elems; j++) {
+        if (col >= params.ne0) {
+            break;
+        }
+        update(i_dst_row + col, select(inter_value(i_dst_row + col), cache[col], col < CACHE_SIZE) * sum_recip);
+        col += wg_size;
+    }
+}
+#end(SHADER)