/*
 * Copyright 2011-2013 Blender Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __UTIL_TYPES_H__
#define __UTIL_TYPES_H__

#ifndef __KERNEL_OPENCL__

#include <stdlib.h>

#endif

/* Bitness */

#if defined(__ppc64__) || defined(__PPC64__) || defined(__x86_64__) || defined(__ia64__) || defined(_M_X64)
#define __KERNEL_64_BIT__
#endif

/* Qualifiers for kernel code shared by CPU and GPU */

#ifndef __KERNEL_GPU__

#define ccl_device static inline
#define ccl_device_noinline static
#define ccl_global
#define ccl_constant
#define __KERNEL_WITH_SSE_ALIGN__

#if defined(_WIN32) && !defined(FREE_WINDOWS)
#define ccl_device_inline static __forceinline
#define ccl_align(...) __declspec(align(__VA_ARGS__))
#ifdef __KERNEL_64_BIT__
#define ccl_try_align(...) __declspec(align(__VA_ARGS__))
#else
#undef __KERNEL_WITH_SSE_ALIGN__
#define ccl_try_align(...) /* not support for function arguments (error C2719) */
#endif
#define ccl_may_alias
#define ccl_always_inline __forceinline
#define ccl_maybe_unused

#else

#define ccl_device_inline static inline __attribute__((always_inline))
#define ccl_align(...) __attribute__((aligned(__VA_ARGS__)))
#ifndef FREE_WINDOWS64
#define __forceinline inline __attribute__((always_inline))
#endif
#define ccl_try_align(...) __attribute__((aligned(__VA_ARGS__)))
#define ccl_may_alias __attribute__((__may_alias__))
#define ccl_always_inline __attribute__((always_inline))
#define ccl_maybe_unused __attribute__((used))

#endif

#endif

/* Standard Integer Types */

#ifndef __KERNEL_GPU__

/* int8_t, uint16_t, and friends */
#ifndef _WIN32
#include <stdint.h>
#endif

/* SIMD Types */

#include "util_optimization.h"

#endif

CCL_NAMESPACE_BEGIN

/* Types
 *
 * Define simpler unsigned type names, and integer with defined number of bits.
 * Also vector types, named to be compatible with OpenCL builtin types, while
 * working for CUDA and C++ too. */

/* Shorter Unsigned Names */

#ifndef __KERNEL_OPENCL__

typedef unsigned char uchar;
typedef unsigned int uint;

#endif

#ifndef __KERNEL_GPU__

/* Fixed Bits Types */

#ifdef _WIN32

typedef signed char int8_t;
typedef unsigned char uint8_t;

typedef signed short int16_t;
typedef unsigned short uint16_t;

typedef signed int int32_t;
typedef unsigned int uint32_t;

typedef long long int64_t;
typedef unsigned long long uint64_t;

#ifdef __KERNEL_64_BIT__
typedef int64_t ssize_t;
#else
typedef int32_t ssize_t;
#endif

#endif

/* Generic Memory Pointer */

typedef uint64_t device_ptr;

/* Vector Types */

struct uchar2 {
	uchar x, y;

	__forceinline uchar operator[](int i) const { return *(&x + i); }
	__forceinline uchar& operator[](int i) { return *(&x + i); }
};

struct uchar3 {
	uchar x, y, z;

	__forceinline uchar operator[](int i) const { return *(&x + i); }
	__forceinline uchar& operator[](int i) { return *(&x + i); }
};

struct uchar4 {
	uchar x, y, z, w;

	__forceinline uchar operator[](int i) const { return *(&x + i); }
	__forceinline uchar& operator[](int i) { return *(&x + i); }
};

struct int2 {
	int x, y;

	__forceinline int operator[](int i) const { return *(&x + i); }
	__forceinline int& operator[](int i) { return *(&x + i); }
};

struct ccl_try_align(16) int3 {
#ifdef __KERNEL_SSE__
	union {
		__m128i m128;
		struct { int x, y, z, w; };
	};

	__forceinline int3() {}
	__forceinline int3(const __m128i a) : m128(a) {}
	__forceinline operator const __m128i&(void) const { return m128; }
	__forceinline operator __m128i&(void) { return m128; }
#else
	int x, y, z, w;
#endif

	__forceinline int operator[](int i) const { return *(&x + i); }
	__forceinline int& operator[](int i) { return *(&x + i); }
};

struct ccl_try_align(16) int4 {
#ifdef __KERNEL_SSE__
	union {
		__m128i m128;
		struct { int x, y, z, w; };
	};

	__forceinline int4() {}
	__forceinline int4(const __m128i a) : m128(a) {}
	__forceinline operator const __m128i&(void) const { return m128; }
	__forceinline operator __m128i&(void) { return m128; }
#else
	int x, y, z, w;
#endif

	__forceinline int operator[](int i) const { return *(&x + i); }
	__forceinline int& operator[](int i) { return *(&x + i); }
};

struct uint2 {
	uint x, y;

	__forceinline uint operator[](uint i) const { return *(&x + i); }
	__forceinline uint& operator[](uint i) { return *(&x + i); }
};

struct uint3 {
	uint x, y, z;

	__forceinline uint operator[](uint i) const { return *(&x + i); }
	__forceinline uint& operator[](uint i) { return *(&x + i); }
};

struct uint4 {
	uint x, y, z, w;

	__forceinline uint operator[](uint i) const { return *(&x + i); }
	__forceinline uint& operator[](uint i) { return *(&x + i); }
};

struct float2 {
	float x, y;

	__forceinline float operator[](int i) const { return *(&x + i); }
	__forceinline float& operator[](int i) { return *(&x + i); }
};

struct ccl_try_align(16) float3 {
#ifdef __KERNEL_SSE__
	union {
		__m128 m128;
		struct { float x, y, z, w; };
	};

	__forceinline float3() {}
	__forceinline float3(const __m128 a) : m128(a) {}
	__forceinline operator const __m128&(void) const { return m128; }
	__forceinline operator __m128&(void) { return m128; }
#else
	float x, y, z, w;
#endif

	__forceinline float operator[](int i) const { return *(&x + i); }
	__forceinline float& operator[](int i) { return *(&x + i); }
};

struct ccl_try_align(16) float4 {
#ifdef __KERNEL_SSE__
	union {
		__m128 m128;
		struct { float x, y, z, w; };
	};

	__forceinline float4() {}
	__forceinline float4(const __m128 a) : m128(a) {}
	__forceinline operator const __m128&(void) const { return m128; }
	__forceinline operator __m128&(void) { return m128; }
#else
	float x, y, z, w;
#endif

	__forceinline float operator[](int i) const { return *(&x + i); }
	__forceinline float& operator[](int i) { return *(&x + i); }
};

template<typename T>
class vector3
{
public:
	T x, y, z;

	ccl_always_inline vector3() {}
	ccl_always_inline vector3(const T& a)
	  : x(a), y(a), z(a) {}
	ccl_always_inline vector3(const T& x, const T& y, const T& z)
	  : x(x), y(y), z(z) {}
};

#endif

#ifndef __KERNEL_GPU__

/* Vector Type Constructors
 * 
 * OpenCL does not support C++ class, so we use these instead. */

ccl_device_inline uchar2 make_uchar2(uchar x, uchar y)
{
	uchar2 a = {x, y};
	return a;
}

ccl_device_inline uchar3 make_uchar3(uchar x, uchar y, uchar z)
{
	uchar3 a = {x, y, z};
	return a;
}

ccl_device_inline uchar4 make_uchar4(uchar x, uchar y, uchar z, uchar w)
{
	uchar4 a = {x, y, z, w};
	return a;
}

ccl_device_inline int2 make_int2(int x, int y)
{
	int2 a = {x, y};
	return a;
}

ccl_device_inline int3 make_int3(int x, int y, int z)
{
#ifdef __KERNEL_SSE__
	int3 a;
	a.m128 = _mm_set_epi32(0, z, y, x);
#else
	int3 a = {x, y, z, 0};
#endif

	return a;
}

ccl_device_inline int4 make_int4(int x, int y, int z, int w)
{
#ifdef __KERNEL_SSE__
	int4 a;
	a.m128 = _mm_set_epi32(w, z, y, x);
#else
	int4 a = {x, y, z, w};
#endif

	return a;
}

ccl_device_inline uint2 make_uint2(uint x, uint y)
{
	uint2 a = {x, y};
	return a;
}

ccl_device_inline uint3 make_uint3(uint x, uint y, uint z)
{
	uint3 a = {x, y, z};
	return a;
}

ccl_device_inline uint4 make_uint4(uint x, uint y, uint z, uint w)
{
	uint4 a = {x, y, z, w};
	return a;
}

ccl_device_inline float2 make_float2(float x, float y)
{
	float2 a = {x, y};
	return a;
}

ccl_device_inline float3 make_float3(float x, float y, float z)
{
#ifdef __KERNEL_SSE__
	float3 a;
	a.m128 = _mm_set_ps(0.0f, z, y, x);
#else
	float3 a = {x, y, z, 0.0f};
#endif

	return a;
}

ccl_device_inline float4 make_float4(float x, float y, float z, float w)
{
#ifdef __KERNEL_SSE__
	float4 a;
	a.m128 = _mm_set_ps(w, z, y, x);
#else
	float4 a = {x, y, z, w};
#endif

	return a;
}

ccl_device_inline int align_up(int offset, int alignment)
{
	return (offset + alignment - 1) & ~(alignment - 1);
}

ccl_device_inline int3 make_int3(int i)
{
#ifdef __KERNEL_SSE__
	int3 a;
	a.m128 = _mm_set1_epi32(i);
#else
	int3 a = {i, i, i, i};
#endif

	return a;
}

ccl_device_inline int4 make_int4(int i)
{
#ifdef __KERNEL_SSE__
	int4 a;
	a.m128 = _mm_set1_epi32(i);
#else
	int4 a = {i, i, i, i};
#endif

	return a;
}

ccl_device_inline float3 make_float3(float f)
{
#ifdef __KERNEL_SSE__
	float3 a;
	a.m128 = _mm_set1_ps(f);
#else
	float3 a = {f, f, f, f};
#endif

	return a;
}

ccl_device_inline float4 make_float4(float f)
{
#ifdef __KERNEL_SSE__
	float4 a;
	a.m128 = _mm_set1_ps(f);
#else
	float4 a = {f, f, f, f};
#endif

	return a;
}

ccl_device_inline float4 make_float4(const int4& i)
{
#ifdef __KERNEL_SSE__
	float4 a;
	a.m128 = _mm_cvtepi32_ps(i.m128);
#else
	float4 a = {(float)i.x, (float)i.y, (float)i.z, (float)i.w};
#endif

	return a;
}

ccl_device_inline int4 make_int4(const float3& f)
{
#ifdef __KERNEL_SSE__
	int4 a;
	a.m128 = _mm_cvtps_epi32(f.m128);
#else
	int4 a = {(int)f.x, (int)f.y, (int)f.z, (int)f.w};
#endif

	return a;
}

#endif

/* Interpolation types for textures
 * cuda also use texture space to store other objects */
enum InterpolationType {
	INTERPOLATION_NONE = -1,
	INTERPOLATION_LINEAR = 0,
	INTERPOLATION_CLOSEST = 1,
	INTERPOLATION_CUBIC = 2,
	INTERPOLATION_SMART = 3,
};

/* macros */

/* hints for branch prediction, only use in code that runs a _lot_ */
#if defined(__GNUC__) && defined(__KERNEL_CPU__)
#  define LIKELY(x)       __builtin_expect(!!(x), 1)
#  define UNLIKELY(x)     __builtin_expect(!!(x), 0)
#else
#  define LIKELY(x)       (x)
#  define UNLIKELY(x)     (x)
#endif

#if defined(__cplusplus) && ((__cplusplus >= 201103L) || (defined(_MSC_VER) && _MSC_VER >= 1800))
#  define HAS_CPP11_FEATURES
#endif

#if defined(__GNUC__) || defined(__clang__)
#  if defined(HAS_CPP11_FEATURES)
/* Some magic to be sure we don't have reference in the type. */
template<typename T> static inline T decltype_helper(T x) { return x; }
#    define TYPEOF(x) decltype(decltype_helper(x))
#  else
#    define TYPEOF(x) typeof(x)
#  endif
#endif

/* Causes warning:
 * incompatible types when assigning to type 'Foo' from type 'Bar'
 * ... the compiler optimizes away the temp var */
#ifdef __GNUC__
#define CHECK_TYPE(var, type)  {  \
	TYPEOF(var) *__tmp;         \
	__tmp = (type *)NULL;         \
	(void)__tmp;                  \
} (void)0

#define CHECK_TYPE_PAIR(var_a, var_b)  {  \
	TYPEOF(var_a) *__tmp;                 \
	__tmp = (typeof(var_b) *)NULL;        \
	(void)__tmp;                          \
} (void)0
#else
#  define CHECK_TYPE(var, type)
#  define CHECK_TYPE_PAIR(var_a, var_b)
#endif

/* can be used in simple macros */
#define CHECK_TYPE_INLINE(val, type) \
	((void)(((type)0) != (val)))


CCL_NAMESPACE_END

#endif /* __UTIL_TYPES_H__ */

