From 34b3e8f9e2ae076990ecf3b2827eff759ba2abf9 Mon Sep 17 00:00:00 2001
From: jfons <joan.fonssanchez@gmail.com>
Date: Tue, 20 Apr 2021 18:38:09 +0200
Subject: Add Embree-aarch64 thirdparty library

---
 .../geometry/curve_intersector_precalculations.h   | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 thirdparty/embree-aarch64/kernels/geometry/curve_intersector_precalculations.h

(limited to 'thirdparty/embree-aarch64/kernels/geometry/curve_intersector_precalculations.h')

diff --git a/thirdparty/embree-aarch64/kernels/geometry/curve_intersector_precalculations.h b/thirdparty/embree-aarch64/kernels/geometry/curve_intersector_precalculations.h
new file mode 100644
index 0000000000..6e9fc91925
--- /dev/null
+++ b/thirdparty/embree-aarch64/kernels/geometry/curve_intersector_precalculations.h
@@ -0,0 +1,49 @@
+// Copyright 2009-2020 Intel Corporation
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#include "../common/ray.h"
+#include "../common/geometry.h"
+
+namespace embree
+{
+  namespace isa
+  {
+    struct CurvePrecalculations1
+    {
+      float depth_scale;
+      LinearSpace3fa ray_space;
+           
+      __forceinline CurvePrecalculations1() {}
+
+      __forceinline CurvePrecalculations1(const Ray& ray, const void* ptr)
+      {
+        depth_scale = rsqrt(dot(ray.dir,ray.dir));
+        LinearSpace3fa space = frame(depth_scale*ray.dir);
+        space.vz *= depth_scale;
+        ray_space = space.transposed();
+      }
+    };
+    
+    template<int K>
+      struct CurvePrecalculationsK
+    {
+      vfloat<K> depth_scale;
+      LinearSpace3fa ray_space[K];
+
+      __forceinline CurvePrecalculationsK(const vbool<K>& valid, const RayK<K>& ray)
+      {
+        size_t mask = movemask(valid);
+        depth_scale = rsqrt(dot(ray.dir,ray.dir));
+        while (mask) {
+          size_t k = bscf(mask);
+          Vec3fa ray_dir_k = Vec3fa(ray.dir.x[k],ray.dir.y[k],ray.dir.z[k]);
+          LinearSpace3fa ray_space_k = frame(depth_scale[k]*ray_dir_k);
+          ray_space_k.vz *= depth_scale[k];
+          ray_space[k] = ray_space_k.transposed();
+        }
+      }
+    };
+  }
+}
-- 
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