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some optimizations to helmholtz #1896

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Merged
zingale merged 1 commit into from
Dec 12, 2025
Merged

some optimizations to helmholtz #1896

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25 changes: 14 additions & 11 deletions EOS/helmholtz/actual_eos.H
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Original file line number Diff line number Diff line change
Expand Up @@ -44,65 +44,68 @@ constexpr std::string_view eos_name = "helmholtz";

// quintic hermite polynomial functions
// psi0 and its derivatives
AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real psi0 (amrex::Real z)
{
return z * z * z * (z * (-6.0e0_rt * z + 15.0e0_rt) -10.0e0_rt) + 1.0e0_rt;
}

AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real dpsi0 (amrex::Real z)
{
return z * z * (z * (-30.0e0_rt*z + 60.0e0_rt) - 30.0e0_rt);
}

AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real ddpsi0 (amrex::Real z)
{
return z * (z * (-120.0e0_rt * z + 180.0e0_rt) - 60.0e0_rt);
}

// psi1 and its derivatives
AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real psi1 (amrex::Real z)
{
return z * ( z * z * (z * (-3.0e0_rt * z + 8.0e0_rt) - 6.0e0_rt) + 1.0e0_rt);
}

AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real dpsi1 (amrex::Real z)
{
return z * z * ( z * (-15.0e0_rt * z + 32.0e0_rt) - 18.0e0_rt) + 1.0e0_rt;
}

AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real ddpsi1 (amrex::Real z)
{
return z * (z * (-60.0e0_rt * z + 96.0e0_rt) - 36.0e0_rt);
}

// psi2 and its derivatives
AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real psi2 (amrex::Real z)
{
return 0.5e0_rt * z * z * ( z * ( z * (-z + 3.0e0_rt) - 3.0e0_rt) + 1.0e0_rt);
}

AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real dpsi2 (amrex::Real z)
{
return 0.5e0_rt * z * (z * (z * (-5.0e0_rt * z + 12.0e0_rt) - 9.0e0_rt) + 2.0e0_rt);
}

AMREX_GPU_HOST_DEVICE AMREX_INLINE
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
amrex::Real ddpsi2 (amrex::Real z)
{
return 0.5e0_rt * (z * ( z * (-20.0e0_rt * z + 36.0e0_rt) - 18.0e0_rt) + 2.0e0_rt);
}

AMREX_GPU_HOST_DEVICE AMREX_INLINE
void fwt (const amrex::Real* fi, const amrex::Real* wt, amrex::Real* fwtr)
AMREX_GPU_HOST_DEVICE AMREX_FORCE_INLINE
void fwt (const amrex::Real* AMREX_RESTRICT fi,
const amrex::Real* AMREX_RESTRICT wt,
amrex::Real* AMREX_RESTRICT fwtr)
{

fwtr[0] = fi[ 0]*wt[0] + fi[ 1]*wt[1] + fi[ 2]*wt[2] + fi[18]*wt[3] + fi[19]*wt[4] + fi[20]*wt[5];
fwtr[1] = fi[ 3]*wt[0] + fi[ 5]*wt[1] + fi[ 7]*wt[2] + fi[21]*wt[3] + fi[23]*wt[4] + fi[25]*wt[5];
fwtr[2] = fi[ 4]*wt[0] + fi[ 6]*wt[1] + fi[ 8]*wt[2] + fi[22]*wt[3] + fi[24]*wt[4] + fi[26]*wt[5];
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