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lammps/lib/cuda/cuda_precision.h
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cuda_precision.h
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/* ----------------------------------------------------------------------
LAMMPS - Large-scale Atomic/Molecular Massively Parallel Simulator
Original Version:
http://lammps.sandia.gov, Sandia National Laboratories
Steve Plimpton, sjplimp@sandia.gov
See the README file in the top-level LAMMPS directory.
-----------------------------------------------------------------------
USER-CUDA Package and associated modifications:
https://sourceforge.net/projects/lammpscuda/
Christian Trott, christian.trott@tu-ilmenau.de
Lars Winterfeld, lars.winterfeld@tu-ilmenau.de
Theoretical Physics II, University of Technology Ilmenau, Germany
See the README file in the USER-CUDA directory.
This software is distributed under the GNU General Public License.
------------------------------------------------------------------------- */
#ifndef CUDA_PRECISION_H_
#define CUDA_PRECISION_H_
/* This File gives Type definitions for mixed precision calculation in the cuda part of LAMMPS-CUDA.
* Predefined behaviour is given by global CUDA_PRECISION (can be overwritten during compilation).
* ***_FLOAT: type definition of given property
* ***_F: constant extension in code (1.0 is interpreted as double while 1.0f is interpreted as float, now use: 1.0CUDA_F)
*/
#ifdef CUDA_USE_BINNING
#define CUDA_IF_BINNING(a) a
#else
#define CUDA_IF_BINNING(a)
#endif
//GLOBAL
#ifdef CUDA_PRECISION
#if CUDA_PRECISION == 1
#define CUDA_FLOAT float
#define CUDA_F(x) x##f
#endif
#if CUDA_PRECISION == 2
#define CUDA_FLOAT double
#define CUDA_F(x) x
#endif
#endif
#ifndef CUDA_PRECISION
#define CUDA_FLOAT double
#define CUDA_F(x) x
#define CUDA_PRECISION 2
#endif
//--------------------------------
//-----------FFT-----------------
//--------------------------------
#ifdef FFT_PRECISION_CU
#if FFT_PRECISION_CU == 1
#define FFT_FLOAT float
#define FFT_F(x) x##f
#endif
#if FFT_PRECISION_CU == 2
#define FFT_FLOAT double
#define FFT_F(x) x
#endif
#endif
#ifndef FFT_PRECISION_CU
#define FFT_FLOAT CUDA_FLOAT
#define FFT_F(x) CUDA_F(x)
#define FFT_PRECISION_CU CUDA_PRECISION
#endif
//--------------------------------
//-----------PPPM-----------------
//--------------------------------
#ifndef PPPM_PRECISION
#define PPPM_PRECISION CUDA_PRECISION
#endif
#ifdef PPPM_PRECISION
#if PPPM_PRECISION == 1
#define PPPM_FLOAT float
#ifdef float3
#define PPPM_FLOAT3 float3
#else
struct PPPM_FLOAT3 {
PPPM_FLOAT x;
PPPM_FLOAT y;
PPPM_FLOAT z;
};
#endif
#define PPPM_F(x) x##f
#endif
#if PPPM_PRECISION == 2
#define PPPM_FLOAT double
struct PPPM_FLOAT3 {
PPPM_FLOAT x;
PPPM_FLOAT y;
PPPM_FLOAT z;
};
#define PPPM_F(x) x
#endif
#endif
//--------------------------------
//-----------FORCE-----------------
//--------------------------------
#ifdef F_PRECISION
#if F_PRECISION == 1
#define F_FLOAT float
#define F_F(x) x##f
#endif
#if F_PRECISION == 2
#define F_FLOAT double
#define F_F(x) x
#endif
#endif
#ifndef F_PRECISION
#define F_FLOAT CUDA_FLOAT
#define F_F(x) CUDA_F(x)
#define F_PRECISION CUDA_PRECISION
#endif
#if F_PRECISION == 1
#define _SQRT_ sqrtf
#define _RSQRT_ rsqrtf
#define _EXP_ expf
#else
#define _SQRT_ sqrt
#define _RSQRT_ rsqrt
#define _EXP_ exp
#endif
#if F_PRECISION == 2
struct F_FLOAT2 {
F_FLOAT x;
F_FLOAT y;
};
struct F_FLOAT3 {
F_FLOAT x;
F_FLOAT y;
F_FLOAT z;
};
struct F_FLOAT4 {
F_FLOAT x;
F_FLOAT y;
F_FLOAT z;
F_FLOAT w;
};
#else
#define F_FLOAT2 float2
#define F_FLOAT3 float3
#define F_FLOAT4 float4
#endif
//--------------------------------
//-----------ENERGY-----------------
//--------------------------------
#ifndef ENERGY_PRECISION
#define ENERGY_FLOAT CUDA_FLOAT
#define ENERGY_F(x) CUDA_F(x)
#endif
#ifdef ENERGY_PRECISION
#if ENERGY_PRECISION == 1
#define ENERGY_FLOAT float
#define ENERGY_F(x) x##f
#endif
#if ENERGY_PRECISION == 2
#define ENERGY_FLOAT double
#define ENERGY_F(x) x
#endif
#endif
#ifndef ENERGY_PRECISION
#define ENERGY_FLOAT CUDA_FLOAT
#define ENERGY_F(x) CUDA_F(x)
#define ENERGY_PRECISION CUDA_PRECISION
#endif
//--------------------------------
//-----------POSITIONS------------
//--------------------------------
#ifdef X_PRECISION
#if X_PRECISION == 1
#define X_FLOAT float
#define X_F(x) x##f
#endif
#if X_PRECISION == 2
#define X_FLOAT double
#define X_F(x) x
#endif
#endif
#ifndef X_PRECISION
#define X_FLOAT CUDA_FLOAT
#define X_F(x) CUDA_F(x)
#define X_PRECISION CUDA_PRECISION
#endif
#if X_PRECISION == 2
struct X_FLOAT2 {
X_FLOAT x;
X_FLOAT y;
};
struct X_FLOAT3 {
X_FLOAT x;
X_FLOAT y;
X_FLOAT z;
};
struct X_FLOAT4 {
X_FLOAT x;
X_FLOAT y;
X_FLOAT z;
X_FLOAT w;
};
#else
#define X_FLOAT2 float2
#define X_FLOAT3 float3
#define X_FLOAT4 float4
#endif
//--------------------------------
//-----------velocities-----------
//--------------------------------
#ifdef V_PRECISION
#if V_PRECISION == 1
#define V_FLOAT float
#define V_F(x) x##f
#endif
#if V_PRECISION == 2
#define V_FLOAT double
#define V_F(x) x
#endif
#endif
#ifndef V_PRECISION
#define V_FLOAT CUDA_FLOAT
#define V_F(x) CUDA_F(x)
#define V_PRECISION CUDA_PRECISION
#endif
#if V_PRECISION == 2
struct V_FLOAT4 {
V_FLOAT x;
V_FLOAT y;
V_FLOAT z;
V_FLOAT w;
};
#else
#define V_FLOAT4 float4
#endif
#ifdef NO_PREC_TIMING
struct timespec_2 {
unsigned int tv_sec;
unsigned int tv_nsec;
};
#define timespec timespec_2
#define clock_gettime(a,b)
#endif
#endif /*CUDA_PRECISION_H_*/
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