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1 files changed, 295 insertions, 0 deletions

diff --git a/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/rope.tmpl.wgsl b/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/rope.tmpl.wgsl
new file mode 100644
index 0000000..84dc8db
--- /dev/null
+++ b/llama.cpp/ggml/src/ggml-webgpu/wgsl-shaders/rope.tmpl.wgsl
@@ -0,0 +1,295 @@
+#define(VARIANTS)
+
+[
+  {
+    "REPLS": {
+      "TYPE" : "f32",
+    },
+    "DECLS": ["NO_FF_BINDINGS", "NO_FF_FUNC", "ROTATE"]
+  },
+  {
+    "SHADER_SUFFIX": "f32_inplace",
+    "REPLS": {
+      "TYPE" : "f32",
+    },
+    "DECLS": ["NO_FF_BINDINGS_INPLACE", "NO_FF_FUNC", "ROTATE_INPLACE"]
+  },
+  {
+    "REPLS": {
+      "TYPE" : "f16",
+    },
+    "DECLS": ["NO_FF_BINDINGS", "NO_FF_FUNC", "ROTATE"]
+  },
+  {
+    "SHADER_SUFFIX": "f16_inplace",
+    "REPLS": {
+      "TYPE" : "f16",
+    },
+    "DECLS": ["NO_FF_BINDINGS_INPLACE", "NO_FF_FUNC", "ROTATE_INPLACE"]
+  },
+  {
+   "SHADER_SUFFIX": "f32_ff",
+    "REPLS": {
+      "TYPE" : "f32",
+    },
+    "DECLS": ["FF_BINDINGS", "FF_FUNC", "ROTATE"]
+  },
+  {
+   "SHADER_SUFFIX": "f32_ff_inplace",
+    "REPLS": {
+      "TYPE" : "f32",
+    },
+    "DECLS": ["FF_BINDINGS_INPLACE", "FF_FUNC", "ROTATE_INPLACE"]
+  },
+  {
+    "SHADER_SUFFIX": "f16_ff",
+    "REPLS": {
+      "TYPE" : "f16",
+    },
+    "DECLS": ["FF_BINDINGS", "FF_FUNC", "ROTATE"]
+  },
+  {
+    "SHADER_SUFFIX": "f16_ff_inplace",
+    "REPLS": {
+      "TYPE" : "f16",
+    },
+    "DECLS": ["FF_BINDINGS_INPLACE", "FF_FUNC", "ROTATE_INPLACE"]
+  }
+]
+
+#end(VARIANTS)
+
+#define(DECLS)
+
+#decl(ROTATE)
+fn rotate(i_dst0: u32, i_dst1: u32, out0: f32, out1: f32) {
+    dst[i_dst0] = {{TYPE}}(out0);
+    dst[i_dst1] = {{TYPE}}(out1);
+}
+#enddecl(ROTATE)
+
+#decl(ROTATE_INPLACE)
+fn rotate(i_dst0: u32, i_dst1: u32, out0: f32, out1: f32) {
+    src0[i_dst0] = {{TYPE}}(out0);
+    src0[i_dst1] = {{TYPE}}(out1);
+}
+#enddecl(ROTATE_INPLACE)
+
+#decl(NO_FF_FUNC)
+fn freq_factor(i: u32) -> f32 {
+    return 1.0f;
+}
+#enddecl(NO_FF_FUNC)
+
+#decl(FF_FUNC)
+fn freq_factor(i: u32) -> f32 {
+    return src2[params.offset_src2 + i/2];
+}
+#enddecl(FF_FUNC)
+
+#decl(NO_FF_BINDINGS)
+
+@group(0) @binding(2)
+var<storage, read_write> dst: array<{{TYPE}}>;
+
+@group(0) @binding(3)
+var<uniform> params: Params;
+
+#enddecl(NO_FF_BINDINGS)
+
+#decl(NO_FF_BINDINGS_INPLACE)
+
+@group(0) @binding(2)
+var<uniform> params: Params;
+
+#enddecl(NO_FF_BINDINGS_INPLACE)
+
+#decl(FF_BINDINGS)
+
+@group(0) @binding(2)
+var<storage, read_write> src2: array<f32>;
+
+@group(0) @binding(3)
+var<storage, read_write> dst: array<{{TYPE}}>;
+
+@group(0) @binding(4)
+var<uniform> params: Params;
+
+#enddecl(FF_BINDINGS)
+
+#decl(FF_BINDINGS_INPLACE)
+
+@group(0) @binding(2)
+var<storage, read_write> src2: array<f32>;
+
+@group(0) @binding(3)
+var<uniform> params: Params;
+
+#enddecl(FF_BINDINGS_INPLACE)
+
+#end(DECLS)
+
+#define(SHADER)
+
+enable f16;
+
+struct Params {
+    offset_src0: u32,
+    offset_src1: u32,
+    offset_src2: u32,
+    offset_dst: u32,
+
+    // Strides (in elements)
+    stride_src01: u32,
+    stride_src02: u32,
+    stride_src03: u32,
+
+    stride_dst1: u32,
+    stride_dst2: u32,
+    stride_dst3: u32,
+
+    n_threads: u32,
+    ne0: u32,
+    ne1: u32,
+    ne2: u32,
+
+    n_dims: u32,
+    mode: u32,
+    theta_scale: f32,
+    attn_factor: f32,
+    freq_scale: f32,
+    ext_factor: f32,
+    corr_dim0: f32,
+    corr_dim1: f32,
+    sections0: u32,
+    sections1: u32,
+    sections2: u32,
+    sections3: u32
+};
+
+@group(0) @binding(0)
+var<storage, read_write> src0: array<{{TYPE}}>;
+
+@group(0) @binding(1)
+var<storage, read_write> src1: array<i32>;
+
+DECLS
+
+fn rope_yarn_ramp(low: f32, high: f32, i: u32) -> f32 {
+    let y = (f32(i / 2) - low) / max(0.001f, high - low);
+    return 1.0f - min(1.0f, max(0.0f, y));
+}
+
+// returns vector of (cos_theta, sin_theta)
+// TODO: check performance of instantiating once on the CPU and passed as buffer, since it's repeated per-row
+fn rope_yarn(theta_extrap: f32, i: u32) -> vec2<f32> {
+    var mscale = params.attn_factor;
+    var theta = params.freq_scale * theta_extrap;
+    if (params.ext_factor != 0.0f) {
+        let ramp_mix = rope_yarn_ramp(params.corr_dim0, params.corr_dim1, i) * params.ext_factor;
+        theta = theta * (1 - ramp_mix) + theta_extrap * ramp_mix;
+        mscale *= 1.0f + 0.1f * log(1.0f / params.freq_scale);
+    }
+    return vec2<f32>(cos(theta) * mscale, sin(theta) * mscale);
+}
+
+fn pair_base(i0: u32, div_2: bool) -> u32 {
+    if (div_2) {
+        return i0 / 2;
+    } else {
+        return i0;
+    }
+}
+
+fn pair_offset(is_neox: bool, is_mrope: bool, is_vision: bool) -> u32 {
+    if (is_vision) {
+        return params.n_dims;
+    } else if (is_neox || is_mrope) {
+        return params.n_dims / 2;
+    } else {
+        return 1;
+    }
+}
+
+override wg_size: u32;
+@compute @workgroup_size(wg_size)
+fn main(@builtin(global_invocation_id) gid: vec3<u32>) {
+    // two elements per thread
+    if (gid.x >= params.n_threads) {
+        return;
+    }
+
+    let is_neox = bool(params.mode & 2);
+    let is_mrope = bool(params.mode & 8);
+    let is_imrope = params.mode == 40;
+    let is_vision = params.mode == 24;
+
+    var i = gid.x * 2; // start index for this thread
+    let i3 = i / (params.ne2 * params.ne1 * params.ne0);
+    i = i % (params.ne2 * params.ne1 * params.ne0);
+    let i2 = i / (params.ne1 * params.ne0);
+    i = i % (params.ne1 * params.ne0);
+    let i1 = i / params.ne0;
+    let i0 = i % params.ne0;
+
+    let i_src_row = params.offset_src0 + i3 * params.stride_src03 + i2 * params.stride_src02 + i1 * params.stride_src01;
+    let i_dst_row = params.offset_dst + i3 * params.stride_dst3 + i2 * params.stride_dst2 + i1 * params.stride_dst1;
+
+    if (i0 >= params.n_dims && !is_vision) {
+        let i_src = i_src_row + i0;
+        let i_dst = i_dst_row + i0;
+        rotate(i_dst, i_dst + 1, f32(src0[i_src]), f32(src0[i_src + 1]));
+        return;
+    }
+
+    var theta_base_mult: u32 = 0;
+    var theta_scale_pwr: u32 = i0 / 2;
+    if (is_mrope) {
+        let sect_dims = params.sections0 + params.sections1 + params.sections2 + params.sections3;
+        let sec_w = params.sections1 + params.sections0;
+        let sec_e = params.sections2 + sec_w;
+        let sector = (i0 / 2) % sect_dims;
+        if (is_imrope) {
+          if (sector % 3 == 1 && sector < 3 * params.sections1) {
+              theta_base_mult = 1;
+          } else if (sector % 3 == 2 && sector < 3 * params.sections2) {
+              theta_base_mult = 2;
+          } else if (sector % 3 == 0 && sector < 3 * params.sections0) {
+              theta_base_mult = 0;
+          } else {
+              theta_base_mult = 3;
+          }
+        } else {
+          if (sector >= params.sections0 && sector < sec_w) {
+              theta_base_mult = 1;
+              if (is_vision) {
+                  theta_scale_pwr = sector - params.sections0;
+              }
+          } else if (sector >= sec_w && sector < sec_e) {
+              theta_base_mult = 2;
+              if (is_vision) {
+                  theta_scale_pwr = sector - sec_w;
+              }
+          } else if (sector >= sec_e) {
+              if (is_vision) {
+                  theta_scale_pwr = sector - sec_e;
+                  theta_scale_pwr = (i0 / 2) % sec_e;
+              }
+              theta_base_mult = 3;
+          } else if (is_vision) {
+              theta_scale_pwr = sector;
+          }
+        }
+    }
+    let theta_base = f32(src1[params.offset_src1 + i2 + params.ne2 * theta_base_mult]) * pow(params.theta_scale, f32(theta_scale_pwr));
+    let thetas = rope_yarn(theta_base/freq_factor(i0), i0);
+
+    let i_src = i_src_row + pair_base(i0, is_neox || is_mrope || is_vision);
+    let i_dst = i_dst_row + pair_base(i0, is_neox || is_mrope || is_vision);
+
+    let x0 = f32(src0[i_src]);
+    let x1 = f32(src0[i_src + pair_offset(is_neox, is_mrope, is_vision)]);
+    rotate(i_dst, i_dst + pair_offset(is_neox, is_mrope, is_vision), x0 * thetas.x - x1 * thetas.y, x0 * thetas.y + x1 * thetas.x);
+}
+
+#end(SHADER)