impl_reference_simd_float.h File Reference

#include "config.h"
#include <cassert>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <algorithm>
#include <array>
#include "gromacs/math/utilities.h"
#include "impl_reference_definitions.h"

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Description

Reference implementation, SIMD single precision.

Author

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

Classes
class	gmx::SimdFloat
	Float SIMD variable. Available if GMX_SIMD_HAVE_FLOAT is 1. More...
class	gmx::SimdFInt32
	Integer SIMD variable type to use for conversions to/from float. More...
class	gmx::SimdFBool
	Boolean type for float SIMD data. More...
class	gmx::SimdFIBool
	Boolean type for integer datatypes corresponding to float SIMD. More...

Functions
SIMD implementation load/store operations for single precision floating point
static SimdFloat gmx_simdcall	gmx::simdLoad (const float *m, SimdFloatTag={})
	Load GMX_SIMD_FLOAT_WIDTH float numbers from aligned memory. More...
static void gmx_simdcall	gmx::store (float *m, SimdFloat a)
	Store the contents of SIMD float variable to aligned memory m. More...
static SimdFloat gmx_simdcall	gmx::simdLoadU (const float *m, SimdFloatTag={})
	Load SIMD float from unaligned memory. More...
static void gmx_simdcall	gmx::storeU (float *m, SimdFloat a)
	Store SIMD float to unaligned memory. More...
static SimdFloat gmx_simdcall	gmx::setZeroF ()
	Set all SIMD float variable elements to 0.0. More...
SIMD implementation load/store operations for integers (corresponding to float)
static SimdFInt32 gmx_simdcall	gmx::simdLoad (const std::int32_t *m, SimdFInt32Tag)
	Load aligned SIMD integer data, width corresponds to gmx::SimdFloat. More...
static void gmx_simdcall	gmx::store (std::int32_t *m, SimdFInt32 a)
	Store aligned SIMD integer data, width corresponds to gmx::SimdFloat. More...
static SimdFInt32 gmx_simdcall	gmx::simdLoadU (const std::int32_t *m, SimdFInt32Tag)
	Load unaligned integer SIMD data, width corresponds to gmx::SimdFloat. More...
static void gmx_simdcall	gmx::storeU (std::int32_t *m, SimdFInt32 a)
	Store unaligned SIMD integer data, width corresponds to gmx::SimdFloat. More...
static SimdFInt32 gmx_simdcall	gmx::setZeroFI ()
	Set all SIMD (float) integer variable elements to 0. More...
template<int index>
static std::int32_t gmx_simdcall	gmx::extract (SimdFInt32 a)
	Extract element with index i from gmx::SimdFInt32. More...
SIMD implementation single precision floating-point bitwise logical operations
static SimdFloat gmx_simdcall	gmx::operator& (SimdFloat a, SimdFloat b)
	Bitwise and for two SIMD float variables. More...
static SimdFloat gmx_simdcall	gmx::andNot (SimdFloat a, SimdFloat b)
	Bitwise andnot for SIMD float. More...
static SimdFloat gmx_simdcall	gmx::operator| (SimdFloat a, SimdFloat b)
	Bitwise or for SIMD float. More...
static SimdFloat gmx_simdcall	gmx::operator^ (SimdFloat a, SimdFloat b)
	Bitwise xor for SIMD float. More...
SIMD implementation single precision floating-point arithmetics
static SimdFloat gmx_simdcall	gmx::operator+ (SimdFloat a, SimdFloat b)
	Add two float SIMD variables. More...
static SimdFloat gmx_simdcall	gmx::operator- (SimdFloat a, SimdFloat b)
	Subtract two float SIMD variables. More...
static SimdFloat gmx_simdcall	gmx::operator- (SimdFloat a)
	SIMD single precision negate. More...
static SimdFloat gmx_simdcall	gmx::operator* (SimdFloat a, SimdFloat b)
	Multiply two float SIMD variables. More...
static SimdFloat gmx_simdcall	gmx::fma (SimdFloat a, SimdFloat b, SimdFloat c)
	SIMD float Fused-multiply-add. Result is a*b+c. More...
static SimdFloat gmx_simdcall	gmx::fms (SimdFloat a, SimdFloat b, SimdFloat c)
	SIMD float Fused-multiply-subtract. Result is a*b-c. More...
static SimdFloat gmx_simdcall	gmx::fnma (SimdFloat a, SimdFloat b, SimdFloat c)
	SIMD float Fused-negated-multiply-add. Result is -a*b+c. More...
static SimdFloat gmx_simdcall	gmx::fnms (SimdFloat a, SimdFloat b, SimdFloat c)
	SIMD float Fused-negated-multiply-subtract. Result is -a*b-c. More...
static SimdFloat gmx_simdcall	gmx::rsqrt (SimdFloat x)
	SIMD float 1.0/sqrt(x) lookup. More...
static SimdFloat gmx_simdcall	gmx::rcp (SimdFloat x)
	SIMD float 1.0/x lookup. More...
static SimdFloat gmx_simdcall	gmx::maskAdd (SimdFloat a, SimdFloat b, SimdFBool m)
	Add two float SIMD variables, masked version. More...
static SimdFloat gmx_simdcall	gmx::maskzMul (SimdFloat a, SimdFloat b, SimdFBool m)
	Multiply two float SIMD variables, masked version. More...
static SimdFloat gmx_simdcall	gmx::maskzFma (SimdFloat a, SimdFloat b, SimdFloat c, SimdFBool m)
	SIMD float fused multiply-add, masked version. More...
static SimdFloat gmx_simdcall	gmx::maskzRsqrt (SimdFloat x, SimdFBool m)
	SIMD float 1.0/sqrt(x) lookup, masked version. More...
static SimdFloat gmx_simdcall	gmx::maskzRcp (SimdFloat x, SimdFBool m)
	SIMD float 1.0/x lookup, masked version. More...
static SimdFloat gmx_simdcall	gmx::abs (SimdFloat a)
	SIMD float Floating-point abs(). More...
static SimdFloat gmx_simdcall	gmx::max (SimdFloat a, SimdFloat b)
	Set each SIMD float element to the largest from two variables. More...
static SimdFloat gmx_simdcall	gmx::min (SimdFloat a, SimdFloat b)
	Set each SIMD float element to the smallest from two variables. More...
static SimdFloat gmx_simdcall	gmx::round (SimdFloat a)
	SIMD float round to nearest integer value (in floating-point format). More...
static SimdFloat gmx_simdcall	gmx::trunc (SimdFloat a)
	Truncate SIMD float, i.e. round towards zero - common hardware instruction. More...
static SimdFloat gmx_simdcall	gmx::frexp (SimdFloat value, SimdFInt32 *exponent)
	Extract (integer) exponent and fraction from single precision SIMD. More...
template<MathOptimization opt = MathOptimization::Safe>
static SimdFloat gmx_simdcall	gmx::ldexp (SimdFloat value, SimdFInt32 exponent)
	Multiply a SIMD float value by the number 2 raised to an exp power. More...
static float gmx_simdcall	gmx::reduce (SimdFloat a)
	Return sum of all elements in SIMD float variable. More...
SIMD implementation single precision floating-point comparisons, boolean, selection.
static SimdFBool gmx_simdcall	gmx::operator== (SimdFloat a, SimdFloat b)
	SIMD a==b for single SIMD. More...
static SimdFBool gmx_simdcall	gmx::operator!= (SimdFloat a, SimdFloat b)
	SIMD a!=b for single SIMD. More...
static SimdFBool gmx_simdcall	gmx::operator< (SimdFloat a, SimdFloat b)
	SIMD a<b for single SIMD. More...
static SimdFBool gmx_simdcall	gmx::operator<= (SimdFloat a, SimdFloat b)
	SIMD a<=b for single SIMD. More...
static SimdFBool gmx_simdcall	gmx::testBits (SimdFloat a)
	Return true if any bits are set in the single precision SIMD. More...
static SimdFBool gmx_simdcall	gmx::operator&& (SimdFBool a, SimdFBool b)
	Logical and on single precision SIMD booleans. More...
static SimdFBool gmx_simdcall	gmx::operator|| (SimdFBool a, SimdFBool b)
	Logical or on single precision SIMD booleans. More...
static bool gmx_simdcall	gmx::anyTrue (SimdFBool a)
	Returns non-zero if any of the boolean in SIMD a is True, otherwise 0. More...
static SimdFloat gmx_simdcall	gmx::selectByMask (SimdFloat a, SimdFBool mask)
	Select from single precision SIMD variable where boolean is true. More...
static SimdFloat gmx_simdcall	gmx::selectByNotMask (SimdFloat a, SimdFBool mask)
	Select from single precision SIMD variable where boolean is false. More...
static SimdFloat gmx_simdcall	gmx::blend (SimdFloat a, SimdFloat b, SimdFBool sel)
	Vector-blend SIMD float selection. More...
SIMD implementation integer (corresponding to float) bitwise logical operations
static SimdFInt32 gmx_simdcall	gmx::operator& (SimdFInt32 a, SimdFInt32 b)
	Integer SIMD bitwise and. More...
static SimdFInt32 gmx_simdcall	gmx::andNot (SimdFInt32 a, SimdFInt32 b)
	Integer SIMD bitwise not/complement. More...
static SimdFInt32 gmx_simdcall	gmx::operator| (SimdFInt32 a, SimdFInt32 b)
	Integer SIMD bitwise or. More...
static SimdFInt32 gmx_simdcall	gmx::operator^ (SimdFInt32 a, SimdFInt32 b)
	Integer SIMD bitwise xor. More...
SIMD implementation integer (corresponding to float) arithmetics
static SimdFInt32 gmx_simdcall	gmx::operator+ (SimdFInt32 a, SimdFInt32 b)
	Add SIMD integers. More...
static SimdFInt32 gmx_simdcall	gmx::operator- (SimdFInt32 a, SimdFInt32 b)
	Subtract SIMD integers. More...
static SimdFInt32 gmx_simdcall	gmx::operator* (SimdFInt32 a, SimdFInt32 b)
	Multiply SIMD integers. More...
SIMD implementation integer (corresponding to float) comparisons, boolean, selection
static SimdFIBool gmx_simdcall	gmx::operator== (SimdFInt32 a, SimdFInt32 b)
	Equality comparison of two integers corresponding to float values. More...
static SimdFIBool gmx_simdcall	gmx::operator< (SimdFInt32 a, SimdFInt32 b)
	Less-than comparison of two SIMD integers corresponding to float values. More...
static SimdFIBool gmx_simdcall	gmx::testBits (SimdFInt32 a)
	Check if any bit is set in each element. More...
static SimdFIBool gmx_simdcall	gmx::operator&& (SimdFIBool a, SimdFIBool b)
	Logical AND on SimdFIBool. More...
static SimdFIBool gmx_simdcall	gmx::operator|| (SimdFIBool a, SimdFIBool b)
	Logical OR on SimdFIBool. More...
static bool gmx_simdcall	gmx::anyTrue (SimdFIBool a)
	Returns true if any of the boolean in x is True, otherwise 0. More...
static SimdFInt32 gmx_simdcall	gmx::selectByMask (SimdFInt32 a, SimdFIBool mask)
	Select from gmx::SimdFInt32 variable where boolean is true. More...
static SimdFInt32 gmx_simdcall	gmx::selectByNotMask (SimdFInt32 a, SimdFIBool mask)
	Select from gmx::SimdFInt32 variable where boolean is false. More...
static SimdFInt32 gmx_simdcall	gmx::blend (SimdFInt32 a, SimdFInt32 b, SimdFIBool sel)
	Vector-blend SIMD integer selection. More...
SIMD implementation conversion operations
static SimdFInt32 gmx_simdcall	gmx::cvtR2I (SimdFloat a)
	Round single precision floating point to integer. More...
static SimdFInt32 gmx_simdcall	gmx::cvttR2I (SimdFloat a)
	Truncate single precision floating point to integer. More...
static SimdFloat gmx_simdcall	gmx::cvtI2R (SimdFInt32 a)
	Convert integer to single precision floating point. More...
static SimdFIBool gmx_simdcall	gmx::cvtB2IB (SimdFBool a)
	Convert from single precision boolean to corresponding integer boolean. More...
static SimdFBool gmx_simdcall	gmx::cvtIB2B (SimdFIBool a)
	Convert from integer boolean to corresponding single precision boolean. More...