Add GPUBackend

include/trigdx/gpu.hpp

@@ -0,0 +1,23 @@
+
+#pragma once
+
+#include <cstddef>
+#include <memory>
+
+#include "interface.hpp"
+
+class GPUBackend : public Backend {
+public:
+  GPUBackend();
+  ~GPUBackend() override;
+
+  void init(size_t n = 0) override;
+  void compute_sinf(size_t n, const float *x, float *s) const override;
+  void compute_cosf(size_t n, const float *x, float *c) const override;
+  void compute_sincosf(size_t n, const float *x, float *s,
+                       float *c) const override;
+
+private:
+  struct Impl;
+  std::unique_ptr<Impl> impl;
+};

include/trigdx/interface.hpp

@@ -8,7 +8,7 @@ public:
   virtual ~Backend() = default;
 
   // Optional initialization
-  virtual void init() {}
+  virtual void init(size_t n = 0) {}
 
   // Compute sine for n elements
   virtual void compute_sinf(size_t n, const float *x, float *s) const = 0;

include/trigdx/lookup.hpp

@@ -10,7 +10,7 @@ public:
   LookupBackend();
   ~LookupBackend() override;
 
-  void init() override;
+  void init(size_t n = 0) override;
   void compute_sinf(size_t n, const float *x, float *s) const override;
   void compute_cosf(size_t n, const float *x, float *c) const override;
   void compute_sincosf(size_t n, const float *x, float *s,

include/trigdx/lookup_avx.hpp

@@ -10,7 +10,7 @@ public:
   LookupAVXBackend();
   ~LookupAVXBackend() override;
 
-  void init() override;
+  void init(size_t n = 0) override;
   void compute_sinf(std::size_t n, const float *x, float *s) const override;
   void compute_cosf(std::size_t n, const float *x, float *c) const override;
   void compute_sincosf(std::size_t n, const float *x, float *s,