source: sasmodels/sasmodels/kernel_header.c @ daeef4c

core_shell_microgelscostrafo411magnetic_modelticket-1257-vesicle-productticket_1156ticket_1265_superballticket_822_more_unit_tests
Last change on this file since daeef4c was daeef4c, checked in by GitHub <noreply@…>, 6 years ago

Merge pull request #24 from SasView?/ticket804

Ticket804

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1#ifdef __OPENCL_VERSION__
2# define USE_OPENCL
3#elif defined(_OPENMP)
4# define USE_OPENMP
5#endif
6
7// If opencl is not available, then we are compiling a C function
8// Note: if using a C++ compiler, then define kernel as extern "C"
9#ifdef USE_OPENCL
10   typedef int int32_t;
11#  if defined(USE_SINCOS)
12#    define SINCOS(angle,svar,cvar) svar=sincos(angle,&cvar)
13#  else
14#    define SINCOS(angle,svar,cvar) do {const double _t_=angle; svar=sin(_t_);cvar=cos(_t_);} while (0)
15#  endif
16   // Intel CPU on Mac gives strange values for erf(); also on the tested
17   // platforms (intel, nvidia, amd), the cephes erf() is significantly
18   // faster than that available in the native OpenCL.
19   #define NEED_ERF
20   // OpenCL only has type generic math
21   #define expf exp
22   #ifndef NEED_ERF
23   #  define erff erf
24   #  define erfcf erfc
25   #endif
26#else // !USE_OPENCL
27// Use SAS_DOUBLE to force the use of double even for float kernels
28#  define SAS_DOUBLE dou ## ble
29#  ifdef __cplusplus
30      #include <cstdio>
31      #include <cmath>
32      using namespace std;
33      #if defined(_MSC_VER)
34         #include <limits>
35         #include <float.h>
36         #define kernel extern "C" __declspec( dllexport )
37         inline double trunc(double x) { return x>=0?floor(x):-floor(-x); }
38         inline double fmin(double x, double y) { return x>y ? y : x; }
39         inline double fmax(double x, double y) { return x<y ? y : x; }
40         #define isnan(x) _isnan(x)
41         #define isinf(x) (!_finite(x))
42         #define isfinite(x) _finite(x)
43         #define NAN (std::numeric_limits<double>::quiet_NaN()) // non-signalling NaN
44         #define INFINITY (std::numeric_limits<double>::infinity())
45         #define NEED_ERF
46         #define NEED_EXPM1
47         #define NEED_TGAMMA
48     #else
49         #define kernel extern "C"
50         #include <cstdint>
51     #endif
52     inline void SINCOS(double angle, double &svar, double &cvar) { svar=sin(angle); cvar=cos(angle); }
53#  else // !__cplusplus
54     #include <inttypes.h>  // C99 guarantees that int32_t types is here
55     #include <stdio.h>
56     #if defined(__TINYC__)
57         typedef int int32_t;
58         #include <math.h>
59         // TODO: test isnan
60         inline double _isnan(double x) { return x != x; } // hope this doesn't optimize away!
61         #undef isnan
62         #define isnan(x) _isnan(x)
63         // Defeat the double->float conversion since we don't have tgmath
64         inline SAS_DOUBLE trunc(SAS_DOUBLE x) { return x>=0?floor(x):-floor(-x); }
65         inline SAS_DOUBLE fmin(SAS_DOUBLE x, SAS_DOUBLE y) { return x>y ? y : x; }
66         inline SAS_DOUBLE fmax(SAS_DOUBLE x, SAS_DOUBLE y) { return x<y ? y : x; }
67         #define NEED_ERF
68         #define NEED_EXPM1
69         #define NEED_TGAMMA
70         // expf missing from windows?
71         #define expf exp
72     #else
73         #include <tgmath.h> // C99 type-generic math, so sin(float) => sinf
74     #endif
75     // MSVC doesn't support C99, so no need for dllexport on C99 branch
76     #define kernel
77     #define SINCOS(angle,svar,cvar) do {const double _t_=angle; svar=sin(_t_);cvar=cos(_t_);} while (0)
78#  endif  // !__cplusplus
79#  define global
80#  define local
81#  define constant const
82// OpenCL powr(a,b) = C99 pow(a,b), b >= 0
83// OpenCL pown(a,b) = C99 pow(a,b), b integer
84#  define powr(a,b) pow(a,b)
85#  define pown(a,b) pow(a,b)
86#endif // !USE_OPENCL
87
88#if defined(NEED_EXPM1)
89   static SAS_DOUBLE expm1(SAS_DOUBLE x_in) {
90      double x = (double)x_in;  // go back to float for single precision kernels
91      // Adapted from the cephes math library.
92      // Copyright 1984 - 1992 by Stephen L. Moshier
93      if (x != x || x == 0.0) {
94         return x; // NaN and +/- 0
95      } else if (x < -0.5 || x > 0.5) {
96         return exp(x) - 1.0;
97      } else {
98         const double xsq = x*x;
99         const double p = (((
100            +1.2617719307481059087798E-4)*xsq
101            +3.0299440770744196129956E-2)*xsq
102            +9.9999999999999999991025E-1);
103         const double q = ((((
104            +3.0019850513866445504159E-6)*xsq
105            +2.5244834034968410419224E-3)*xsq
106            +2.2726554820815502876593E-1)*xsq
107            +2.0000000000000000000897E0);
108         double r = x * p;
109         r =  r / (q - r);
110         return r+r;
111       }
112   }
113#endif
114
115// Standard mathematical constants:
116//   M_E, M_LOG2E, M_LOG10E, M_LN2, M_LN10, M_PI, M_PI_2=pi/2, M_PI_4=pi/4,
117//   M_1_PI=1/pi, M_2_PI=2/pi, M_2_SQRTPI=2/sqrt(pi), SQRT2, SQRT1_2=sqrt(1/2)
118// OpenCL defines M_constant_F for float constants, and nothing if double
119// is not enabled on the card, which is why these constants may be missing
120#ifndef M_PI
121#  define M_PI 3.141592653589793
122#endif
123#ifndef M_PI_2
124#  define M_PI_2 1.570796326794897
125#endif
126#ifndef M_PI_4
127#  define M_PI_4 0.7853981633974483
128#endif
129#ifndef M_E
130#  define M_E 2.718281828459045091
131#endif
132#ifndef M_SQRT1_2
133#  define M_SQRT1_2 0.70710678118654746
134#endif
135
136// Non-standard function library
137// pi/180, used for converting between degrees and radians
138// 4/3 pi for computing sphere volumes
139// square and cube for computing squares and cubes
140#ifndef M_PI_180
141#  define M_PI_180 0.017453292519943295
142#endif
143#ifndef M_4PI_3
144#  define M_4PI_3 4.18879020478639
145#endif
146inline double square(double x) { return x*x; }
147inline double cube(double x) { return x*x*x; }
148inline double sas_sinx_x(double x) { return x==0 ? 1.0 : sin(x)/x; }
149
150#if 1
151//think cos(theta) should be sin(theta) in new coords, RKH 11Jan2017
152#define ORIENT_SYMMETRIC(qx, qy, theta, phi, q, sn, cn) do { \
153    SINCOS(phi*M_PI_180, sn, cn); \
154    q = sqrt(qx*qx + qy*qy); \
155    cn  = (q==0. ? 1.0 : (cn*qx + sn*qy)/q * sin(theta*M_PI_180));  \
156    sn = sqrt(1 - cn*cn); \
157    } while (0)
158#else
159// SasView 3.x definition of orientation
160#define ORIENT_SYMMETRIC(qx, qy, theta, phi, q, sn, cn) do { \
161    SINCOS(theta*M_PI_180, sn, cn); \
162    q = sqrt(qx*qx + qy*qy);\
163    cn = (q==0. ? 1.0 : (cn*cos(phi*M_PI_180)*qx + sn*qy)/q); \
164    sn = sqrt(1 - cn*cn); \
165    } while (0)
166#endif
167
168#define ORIENT_ASYMMETRIC(qx, qy, theta, phi, psi, q, cos_alpha, cos_mu, cos_nu) do { \
169    q = sqrt(qx*qx + qy*qy); \
170    const double qxhat = qx/q; \
171    const double qyhat = qy/q; \
172    double sin_theta, cos_theta; \
173    double sin_phi, cos_phi; \
174    double sin_psi, cos_psi; \
175    SINCOS(theta*M_PI_180, sin_theta, cos_theta); \
176    SINCOS(phi*M_PI_180, sin_phi, cos_phi); \
177    SINCOS(psi*M_PI_180, sin_psi, cos_psi); \
178    cos_alpha = cos_theta*cos_phi*qxhat + sin_theta*qyhat; \
179    cos_mu = (-sin_theta*cos_psi*cos_phi - sin_psi*sin_phi)*qxhat + cos_theta*cos_psi*qyhat; \
180    cos_nu = (-cos_phi*sin_psi*sin_theta + sin_phi*cos_psi)*qxhat + sin_psi*cos_theta*qyhat; \
181    } while (0)
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