srfm::simd::detail Namespace Reference

Functions
static double	hmax_pd_avx2 (__m256d v) noexcept
void	compute_beta_avx2 (const double *__restrict__ velocities, std::size_t n, double &running_max, double *__restrict__ out) noexcept
	AVX2 (256-bit, 4-wide) beta batch kernel.
void	compute_beta_avx512 (const double *__restrict__ velocities, std::size_t n, double &running_max, double *__restrict__ out) noexcept
	AVX-512F (512-bit, 8-wide) beta batch kernel.
void	compute_beta_scalar (const double *__restrict__ velocities, std::size_t n, double &running_max, double *__restrict__ out) noexcept
	Scalar reference implementation of the beta batch kernel.
void	compute_gamma_avx2 (const double *__restrict__ betas, std::size_t n, double *__restrict__ out) noexcept
	AVX2 (256-bit, 4-wide) gamma batch kernel.
void	compute_gamma_avx512 (const double *__restrict__ betas, std::size_t n, double *__restrict__ out) noexcept
	AVX-512F (512-bit, 8-wide) gamma batch kernel.
void	compute_gamma_scalar (const double *__restrict__ betas, std::size_t n, double *__restrict__ out) noexcept
	Scalar reference implementation of the gamma batch kernel.
void	cpuid (std::uint32_t leaf, std::uint32_t subleaf, std::uint32_t out[4]) noexcept
std::uint64_t	xgetbv (std::uint32_t xcr) noexcept
	Read XCR0 (used to verify OS XSAVE support for YMM/ZMM state).
bool	os_saves_ymm () noexcept
	Probe OS support for YMM (AVX) register save/restore.
bool	os_saves_zmm () noexcept
	Probe OS support for ZMM (AVX-512) register save/restore.

Variables
static constexpr double	BETA_CLAMP_LIMIT
static constexpr std::uint64_t	ABS_MASK_U64 = 0x7FFF'FFFF'FFFF'FFFFu
static constexpr double	BETA_CLAMP_LIMIT
static constexpr double	BETA_CLAMP_LIMIT
static constexpr double	BETA_CLAMP_LIMIT
static constexpr double	BETA_CLAMP_LIMIT
static constexpr double	BETA_CLAMP_LIMIT

Function Documentation

compute_beta_avx2()

void srfm::simd::detail::compute_beta_avx2 ( const double *__restrict__  velocities, std::size_t  n, double &  running_max, double *__restrict__  out  )

noexcept

AVX2 (256-bit, 4-wide) beta batch kernel.

Requires AVX2 support (detected at runtime). Falls back to scalar for tail elements when n % 4 != 0.

Definition at line 44 of file beta_avx2.cpp.

compute_beta_avx512()

void srfm::simd::detail::compute_beta_avx512 ( const double *__restrict__  velocities, std::size_t  n, double &  running_max, double *__restrict__  out  )

noexcept

AVX-512F (512-bit, 8-wide) beta batch kernel.

Requires AVX-512F support (detected at runtime). Falls back to scalar for tail elements when n % 8 != 0.

Definition at line 33 of file beta_avx512.cpp.

compute_beta_scalar()

void srfm::simd::detail::compute_beta_scalar ( const double *__restrict__  velocities, std::size_t  n, double &  running_max, double *__restrict__  out  )

noexcept

Scalar reference implementation of the beta batch kernel.

Always available regardless of hardware. Used as the authoritative correctness reference and as the tail handler for wider kernels.

Parameters

velocities	Input price velocities (any finite double).
n	Number of elements.
running_max	Current running maximum of |velocity|; updated in-place.
out	Output beta values, one per input velocity.

Definition at line 38 of file beta_scalar.cpp.

compute_gamma_avx2()

void srfm::simd::detail::compute_gamma_avx2 ( const double *__restrict__  betas, std::size_t  n, double *__restrict__  out  )

noexcept

AVX2 (256-bit, 4-wide) gamma batch kernel.

Definition at line 40 of file gamma_avx2.cpp.

compute_gamma_avx512()

void srfm::simd::detail::compute_gamma_avx512 ( const double *__restrict__  betas, std::size_t  n, double *__restrict__  out  )

noexcept

AVX-512F (512-bit, 8-wide) gamma batch kernel.

Definition at line 55 of file gamma_avx512.cpp.

compute_gamma_scalar()

void srfm::simd::detail::compute_gamma_scalar ( const double *__restrict__  betas, std::size_t  n, double *__restrict__  out  )

noexcept

Scalar reference implementation of the gamma batch kernel.

Computes gamma_i = 1.0 / sqrt(1.0 - betas[i]^2). Clamps betas[i] to BETA_CLAMP_SAFE before the sqrt to prevent NaN.

Parameters

betas	Input beta values in [0, BETA_MAX_SAFE].
n	Number of elements.
out	Output gamma values, one per input beta.

Definition at line 33 of file gamma_scalar.cpp.

cpuid()

void srfm::simd::detail::cpuid ( std::uint32_t  leaf, std::uint32_t  subleaf, std::uint32_t  out[4]  )

inlinenoexcept

Thin portable wrapper around the CPUID instruction.

Parameters

leaf	EAX input (function).
subleaf	ECX input (sub-function). 0 for most leaves.
out	Output array: [EAX, EBX, ECX, EDX].

Examples

/home/runner/work/Special-Relativity-in-Financial-Modeling/Special-Relativity-in-Financial-Modeling/include/srfm/simd/cpu_features.hpp.

Definition at line 74 of file cpu_features.hpp.

hmax_pd_avx2()

static double srfm::simd::detail::hmax_pd_avx2 ( __m256d  v )

inlinestaticnoexcept

Definition at line 36 of file beta_avx2.cpp.

os_saves_ymm()

bool srfm::simd::detail::os_saves_ymm ( )

inlinenoexcept

Probe OS support for YMM (AVX) register save/restore.

Examples

/home/runner/work/Special-Relativity-in-Financial-Modeling/Special-Relativity-in-Financial-Modeling/include/srfm/simd/cpu_features.hpp.

Definition at line 105 of file cpu_features.hpp.

os_saves_zmm()

bool srfm::simd::detail::os_saves_zmm ( )

inlinenoexcept

Probe OS support for ZMM (AVX-512) register save/restore.

Examples

/home/runner/work/Special-Relativity-in-Financial-Modeling/Special-Relativity-in-Financial-Modeling/include/srfm/simd/cpu_features.hpp.

Definition at line 117 of file cpu_features.hpp.

xgetbv()

std::uint64_t srfm::simd::detail::xgetbv ( std::uint32_t  xcr )

inlinenoexcept

Read XCR0 (used to verify OS XSAVE support for YMM/ZMM state).

Examples

/home/runner/work/Special-Relativity-in-Financial-Modeling/Special-Relativity-in-Financial-Modeling/include/srfm/simd/cpu_features.hpp.

Definition at line 91 of file cpu_features.hpp.

Variable Documentation

ABS_MASK_U64

constexpr std::uint64_t srfm::simd::detail::ABS_MASK_U64 = 0x7FFF'FFFF'FFFF'FFFFu

staticconstexpr

Definition at line 33 of file beta_avx2.cpp.

BETA_CLAMP_LIMIT [1/6]

constexpr double srfm::simd::detail::BETA_CLAMP_LIMIT

staticconstexpr

Initial value:

=
    srfm::momentum::BETA_MAX_SAFE - 1.0e-10

Definition at line 30 of file beta_avx2.cpp.

BETA_CLAMP_LIMIT [2/6]

constexpr double srfm::simd::detail::BETA_CLAMP_LIMIT

staticconstexpr

Initial value:

=
    srfm::momentum::BETA_MAX_SAFE - 1.0e-10

Definition at line 30 of file beta_avx512.cpp.

BETA_CLAMP_LIMIT [3/6]

constexpr double srfm::simd::detail::BETA_CLAMP_LIMIT

staticconstexpr

Initial value:

=
    srfm::momentum::BETA_MAX_SAFE - 1.0e-10

Definition at line 35 of file beta_scalar.cpp.

BETA_CLAMP_LIMIT [4/6]

constexpr double srfm::simd::detail::BETA_CLAMP_LIMIT

staticconstexpr

Initial value:

=
    srfm::momentum::BETA_MAX_SAFE - 1.0e-10

Definition at line 37 of file gamma_avx2.cpp.

BETA_CLAMP_LIMIT [5/6]

constexpr double srfm::simd::detail::BETA_CLAMP_LIMIT

staticconstexpr

Initial value:

=
    srfm::momentum::BETA_MAX_SAFE - 1.0e-10

Definition at line 52 of file gamma_avx512.cpp.

BETA_CLAMP_LIMIT [6/6]

constexpr double srfm::simd::detail::BETA_CLAMP_LIMIT

staticconstexpr

Initial value:

=
    srfm::momentum::BETA_MAX_SAFE - 1.0e-10

Definition at line 30 of file gamma_scalar.cpp.