impl_reference_definitions.h File Reference

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Description

Reference SIMD implementation, including SIMD documentation.

Author

Erik Lindahl erik..nosp@m.lind.nosp@m.ahl@s.nosp@m.cili.nosp@m.felab.nosp@m..se

Macros
SIMD implementation capability definitions
#define	GMX_SIMD   1
	1 if any SIMD support is present, otherwise 0.
#define	GMX_SIMD_HAVE_FLOAT   1
	1 when SIMD float support is present, otherwise 0 More...
#define	GMX_SIMD_HAVE_DOUBLE   1
	1 if SIMD double support is present, otherwise 0
#define	GMX_SIMD_HAVE_LOADU   1
	1 if the SIMD implementation supports unaligned loads, otherwise 0
#define	GMX_SIMD_HAVE_STOREU   1
	1 if the SIMD implementation supports unaligned stores, otherwise 0
#define	GMX_SIMD_HAVE_FMA   0
	1 if the SIMD implementation has fused-multiply add hardware More...
#define	GMX_SIMD_HAVE_LOGICAL   1
	1 if SIMD impl has logical operations on floating-point data, otherwise 0
#define	GMX_SIMD_HAVE_FINT32_EXTRACT   1
	Support for extracting integers from gmx::SimdFInt32 (1/0 for present/absent)
#define	GMX_SIMD_HAVE_FINT32_LOGICAL   1
	1 if SIMD logical ops are supported for gmx::SimdFInt32, otherwise 0
#define	GMX_SIMD_HAVE_FINT32_ARITHMETICS   1
	1 if SIMD arithmetic ops are supported for gmx::SimdFInt32, otherwise 0
#define	GMX_SIMD_HAVE_DINT32_EXTRACT   1
	Support for extracting integer from gmx::SimdDInt32 (1/0 for present/absent)
#define	GMX_SIMD_HAVE_DINT32_LOGICAL   1
	1 if logical operations are supported for gmx::SimdDInt32, otherwise 0
#define	GMX_SIMD_HAVE_DINT32_ARITHMETICS   1
	1 if SIMD arithmetic ops are supported for gmx::SimdDInt32, otherwise 0
#define	GMX_SIMD_HAVE_NATIVE_COPYSIGN_FLOAT   0
	1 if implementation provides single precision copysign() More...
#define	GMX_SIMD_HAVE_NATIVE_RSQRT_ITER_FLOAT   0
	1 if implementation provides single precision 1/sqrt(x) N-R iterations faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_RCP_ITER_FLOAT   0
	1 if implementation provides single precision 1/x N-R iterations faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_LOG_FLOAT   0
	1 if implementation provides single precision log() faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_EXP2_FLOAT   0
	1 if implementation provides single precision exp2() faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_EXP_FLOAT   0
	1 if implementation provides single precision exp() faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_COPYSIGN_DOUBLE   0
	1 if implementation provides double precision copysign() More...
#define	GMX_SIMD_HAVE_NATIVE_RSQRT_ITER_DOUBLE   0
	1 if implementation provides double precision 1/sqrt(x) N-R iterations faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_RCP_ITER_DOUBLE   0
	1 if implementation provides double precision 1/x N-R iterations faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_LOG_DOUBLE   0
	1 if implementation provides double precision log() faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_EXP2_DOUBLE   0
	1 if implementation provides double precision exp2() faster than simd_math.h More...
#define	GMX_SIMD_HAVE_NATIVE_EXP_DOUBLE   0
	1 if implementation provides double precision exp() faster than simd_math.h More...
#define	GMX_SIMD_HAVE_GATHER_LOADU_BYSIMDINT_TRANSPOSE_FLOAT   1
	1 if gmx::gatherLoadUBySimdIntTranspose is present, otherwise 0
#define	GMX_SIMD_HAVE_GATHER_LOADU_BYSIMDINT_TRANSPOSE_DOUBLE   1
	1 if gmx::gatherLoadUBySimdIntTranspose is present, otherwise 0
#define	GMX_SIMD_HAVE_HSIMD_UTIL_FLOAT   1
	1 if float half-register load/store/reduce utils present, otherwise 0
#define	GMX_SIMD_HAVE_HSIMD_UTIL_DOUBLE   1
	1 if double half-register load/store/reduce utils present, otherwise 0
#define	GMX_SIMD_FLOAT_WIDTH   4
	Width of the gmx::SimdFloat datatype.
#define	GMX_SIMD_DOUBLE_WIDTH   4
	Width of the gmx::SimdDouble datatype.
#define	GMX_SIMD_HAVE_4NSIMD_UTIL_FLOAT   1
	1 if float 4xN load utils present, otherwise 0
#define	GMX_SIMD_HAVE_4NSIMD_UTIL_DOUBLE   1
	1 if double 4xN load utils present, otherwise 0
#define	GMX_SIMD4_HAVE_FLOAT   1
	1 if implementation provides gmx::Simd4Float, otherwise 0.
#define	GMX_SIMD4_HAVE_DOUBLE   1
	1 if the implementation provides gmx::Simd4Double, otherwise 0.
#define	GMX_SIMD_FINT32_WIDTH   GMX_SIMD_FLOAT_WIDTH
	Width of the gmx::SimdFInt32 datatype.
#define	GMX_SIMD_DINT32_WIDTH   GMX_SIMD_DOUBLE_WIDTH
	Width of the gmx::SimdDInt32 datatype.
#define	GMX_SIMD4_WIDTH   4
	The SIMD4 type is always four units wide, but this makes code more explicit.
#define	GMX_SIMD_ALIGNMENT   8
	Required alignment in bytes for aligned load/store (always defined, even without SIMD)
#define	GMX_SIMD_RSQRT_BITS   23
	Accuracy of SIMD 1/sqrt(x) lookup. Used to determine number of iterations.
#define	GMX_SIMD_RCP_BITS   23
	Accuracy of SIMD 1/x lookup. Used to determine number of iterations.