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GPUTracking: compile the real kernels into the Metal library #15817

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4efc17b
GPU: stop considering OpenCL on macOS
ktf Sep 21, 2026
99542dd
GPU: do not place anything in the Metal constant address space
ktf Sep 21, 2026
5da0373
GPU: Apple Metal backend, off by default
ktf Sep 21, 2026
b5d823a
TRD: let PadPlane be read from a device without double
ktf Sep 21, 2026
2977ddb
Common: keep the double-only constants and helpers off a device witho…
ktf Sep 21, 2026
69e119f
ReconstructionDataFormats: keep the double SMatrix aliases off Metal
ktf Sep 21, 2026
02d9944
MathUtils: make SMatrixGPU compile as MSL
ktf Sep 21, 2026
2dc2b5c
GPU: keep the double math helpers off Metal
ktf Sep 21, 2026
2586a92
GPU: adapt the remaining Common and Utils headers to Metal
ktf Sep 21, 2026
ed4dcd3
MathUtils: keep the double-only declarations off Metal
ktf Sep 21, 2026
8a9de60
Reuse GPUdoubleValue for the last double declarations reaching device…
ktf Sep 21, 2026
ff132af
GPU: give Metal a column in the tuning parameter table
ktf Sep 21, 2026
acf50c3
GPU: give Metal its own spellings for three math helpers
ktf Sep 21, 2026
b8810aa
GPU: extend two existing OpenCL device workarounds to Metal
ktf Sep 21, 2026
3945843
GPU: three more small Metal adaptations
ktf Sep 21, 2026
35c95c3
ML: make the GPU float16 header compile as MSL
ktf Sep 21, 2026
cc3aed0
GPU: make the kernel entry-point signature work on Metal
ktf Sep 21, 2026
1f3f269
GPU: number the kernel arguments so Metal can bind them
ktf Sep 21, 2026
3e64a79
Add GPUdoubleCalc and use it for the double-precision track math
ktf Sep 21, 2026
88e8ebc
GPU: take the work-item indices from the kernel parameters
ktf Sep 21, 2026
26b9b60
GPU: only use GPUdoubleCalc where fast math is off
ktf Sep 21, 2026
a5fad7b
GPU: make GPUdoubleCalcImpl cheaper and more accurate
ktf Sep 21, 2026
051a2ee
MathUtils: extend the OpenCL sincos workaround to Metal
ktf Sep 21, 2026
f249a4d
GPU: reach global memory through the generic address space on Metal
ktf Sep 21, 2026
bb585c3
GPU: make the Metal atomics operate on plain counters
ktf Sep 21, 2026
7d739bc
GPU: define CAMath::Abs for GPUdoubleCalcImpl
ktf Sep 21, 2026
170d0ce
GPU: add an emulated binary64 and a selector for GPUdoubleCalc
ktf Sep 21, 2026
3190553
GPUTracking: drop static from the function-scope constants
ktf Sep 21, 2026
fdadd54
GPUTracking: declare the resolve kernel's shared memory as shared
ktf Sep 21, 2026
098e41c
GPUTracking: rename the cluster finder's fragment to frag
ktf Sep 21, 2026
0cacef4
GPU: let the constant-address-space constants be built on Metal
ktf Sep 21, 2026
3c0884c
GPU: make std::is_pointer address-space aware on Metal
ktf Sep 21, 2026
4838938
GPUTracking: take GPUdoubleValue in GetPadRowNumber
ktf Sep 21, 2026
f2c04e4
GPUTracking: replace the merger's goto with a flag
ktf Sep 21, 2026
3e299bb
MathUtils: let bringTo* deduce the type of the call they forward to
ktf Sep 21, 2026
5e1b1f9
DetectorsBase: keep the Propagator's double off Metal
ktf Sep 21, 2026
18c429a
MathUtils: materialise the product in SMatrixGPU's operator*=
ktf Sep 21, 2026
c1c86e4
ReconstructionDataFormats: express the SMatrix aliases in GPUdoubleCalc
ktf Sep 21, 2026
da3986b
GPU: hand the kernel pointers to Thread() as generic pointers
ktf Sep 21, 2026
b53be27
GPU: check that the toolchain can compile MSL 4.1 before enabling Metal
ktf Sep 21, 2026
424fb07
GPUTracking: compile the real kernels into the Metal library
ktf Sep 21, 2026
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14 changes: 8 additions & 6 deletions Common/Constants/include/CommonConstants/LHCConstants.h
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,8 @@
#ifndef ALICEO2_LHCCONSTANTS_H_
#define ALICEO2_LHCCONSTANTS_H_

#include "GPUCommonDouble.h"

#include "GPUCommonDef.h"

namespace o2
Expand All @@ -31,12 +33,12 @@ enum BeamDirection : int { BeamA, // beamA = beam 0,
InteractingBC = -1 // as used in the BunchFilling class
};
GPUglobalconstexpr() int LHCMaxBunches = 3564; // max N bunches
constexpr double LHCRFFreq = 400.789e6; // LHC RF frequency in Hz
constexpr double LHCBunchSpacingNS = 10 * 1.e9 / LHCRFFreq; // bunch spacing in ns (10 RFbuckets)
constexpr double LHCOrbitNS = LHCMaxBunches * LHCBunchSpacingNS; // orbit duration in ns
constexpr double LHCRevFreq = 1.e9 / LHCOrbitNS; // revolution frequency
constexpr double LHCBunchSpacingMUS = LHCBunchSpacingNS * 1e-3; // bunch spacing in \mus (10 RFbuckets)
constexpr double LHCOrbitMUS = LHCOrbitNS * 1e-3; // orbit duration in \mus
GPUglobalconstexpr() o2::gpu::GPUdoubleValue LHCRFFreq = 400.789e6; // LHC RF frequency in Hz
GPUglobalconstexpr() o2::gpu::GPUdoubleValue LHCBunchSpacingNS = 10 * 1.e9 / LHCRFFreq; // bunch spacing in ns (10 RFbuckets)
GPUglobalconstexpr() o2::gpu::GPUdoubleValue LHCOrbitNS = LHCMaxBunches * LHCBunchSpacingNS; // orbit duration in ns
GPUglobalconstexpr() o2::gpu::GPUdoubleValue LHCRevFreq = 1.e9 / LHCOrbitNS; // revolution frequency
GPUglobalconstexpr() o2::gpu::GPUdoubleValue LHCBunchSpacingMUS = LHCBunchSpacingNS * 1e-3; // bunch spacing in \mus (10 RFbuckets)
GPUglobalconstexpr() o2::gpu::GPUdoubleValue LHCOrbitMUS = LHCOrbitNS * 1e-3; // orbit duration in \mus
GPUglobalconstexpr() unsigned int MaxNOrbits = 0xffffffff;

// Offsets of A, C beam bunches at P2
Expand Down
285 changes: 148 additions & 137 deletions Common/Constants/include/CommonConstants/PhysicsConstants.h
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Original file line number Diff line number Diff line change
Expand Up @@ -18,8 +18,19 @@
#ifndef ALICEO2_PHYSICSCONSTANTS_H_
#define ALICEO2_PHYSICSCONSTANTS_H_

#include "GPUCommonDef.h"

namespace o2::constants::physics
{
#ifdef __METAL__
// MSL has no double. The masses only ever serve as compile-time initialisers,
// and the tables built from them (PID::sMasses) are float already, so nothing
// is lost. Every other backend, device included, keeps double.
using MassType = float;
#else
using MassType = double;
#endif

// particles masses

// BEGINNING OF THE GENERATED BLOCK.
Expand Down Expand Up @@ -102,153 +113,153 @@ enum Pdg {
};

/// \brief Declarations of masses for additional particles
constexpr double MassEta = 0.547862;
constexpr double MassOmega = 0.78266;
constexpr double MassEtaPrime = 0.95778;
constexpr double MassB0 = 5.27966;
constexpr double MassB0Bar = 5.27966;
constexpr double MassBPlus = 5.27934;
constexpr double MassBCPlus = 6.27447;
constexpr double MassBS = 5.36692;
constexpr double MassBSBar = 5.36692;
constexpr double MassD0 = 1.86484;
constexpr double MassD0Bar = 1.86484;
constexpr double MassD0StarPlus = 2.272;
constexpr double MassD0Star0 = 2.343;
constexpr double MassD1Plus = 2.372;
constexpr double MassD10 = 2.412;
constexpr double MassD2StarPlus = 2.4601;
constexpr double MassD2Star0 = 2.4611;
constexpr double MassDMinus = 1.86966;
constexpr double MassDPlus = 1.86966;
constexpr double MassDS = 1.96835;
constexpr double MassDSBar = 1.96835;
constexpr double MassDSStar = 2.1122;
constexpr double MassDS1 = 2.53511;
constexpr double MassDS1Star2700 = 2.714;
constexpr double MassDS1Star2860 = 2.859;
constexpr double MassDS2Star = 2.5691;
constexpr double MassDS3Star2860 = 2.86;
constexpr double MassDStar = 2.01026;
constexpr double MassDStar0 = 2.00685;
constexpr double MassChiC1 = 3.51067;
constexpr double MassJPsi = 3.0969;
constexpr double MassLambdaB0 = 5.6196;
constexpr double MassLambdaCPlus = 2.28646;
constexpr double MassLambdaCPlus2860 = 2.8561;
constexpr double MassLambdaCPlus2880 = 2.8816;
constexpr double MassLambdaCPlus2940 = 2.9396;
constexpr double MassOmegaC0 = 2.6952;
constexpr double MassK0Star892 = 0.89555;
constexpr double MassKPlusStar892 = 0.89167;
constexpr double MassPhi = 1.019461;
constexpr double MassSigmaC0 = 2.45375;
constexpr double MassSigmaCPlusPlus = 2.45397;
constexpr double MassSigmaCStar0 = 2.51848;
constexpr double MassSigmaCStarPlusPlus = 2.51841;
constexpr double MassX3872 = 3.87165;
constexpr double MassXi0 = 1.31486;
constexpr double MassXiB0 = 5.7919;
constexpr double MassXiCCPlusPlus = 3.62155;
constexpr double MassXiCPlus = 2.46771;
constexpr double MassXiC0 = 2.47044;
constexpr double MassXiC3055Plus = 3.0559;
constexpr double MassXiC3080Plus = 3.0772;
constexpr double MassXiC3055_0 = 3.059;
constexpr double MassXiC3080_0 = 3.0799;
constexpr double MassDeuteron = 1.87561294257;
constexpr double MassTriton = 2.80892113298;
constexpr double MassHelium3 = 2.80839160743;
constexpr double MassAlpha = 3.7273794066;
constexpr double MassLithium4 = 3.7513;
constexpr double MassHyperTriton = 2.991134;
constexpr double MassHyperHydrogen4 = 3.922434;
constexpr double MassHyperHelium4 = 3.921728;
constexpr double MassHyperHelium5 = 4.839961;
constexpr double MassHyperHelium4Sigma = 3.995;
constexpr double MassLambda1520_Py = 1.5195;
constexpr double MassK1_1270_0 = 1.253;
constexpr double MassK1_1270Plus = 1.272;
constexpr double MassCDeuteron = 3.226;
GPUglobalconstexpr() MassType MassEta = 0.547862;
GPUglobalconstexpr() MassType MassOmega = 0.78266;
GPUglobalconstexpr() MassType MassEtaPrime = 0.95778;
GPUglobalconstexpr() MassType MassB0 = 5.27966;
GPUglobalconstexpr() MassType MassB0Bar = 5.27966;
GPUglobalconstexpr() MassType MassBPlus = 5.27934;
GPUglobalconstexpr() MassType MassBCPlus = 6.27447;
GPUglobalconstexpr() MassType MassBS = 5.36692;
GPUglobalconstexpr() MassType MassBSBar = 5.36692;
GPUglobalconstexpr() MassType MassD0 = 1.86484;
GPUglobalconstexpr() MassType MassD0Bar = 1.86484;
GPUglobalconstexpr() MassType MassD0StarPlus = 2.272;
GPUglobalconstexpr() MassType MassD0Star0 = 2.343;
GPUglobalconstexpr() MassType MassD1Plus = 2.372;
GPUglobalconstexpr() MassType MassD10 = 2.412;
GPUglobalconstexpr() MassType MassD2StarPlus = 2.4601;
GPUglobalconstexpr() MassType MassD2Star0 = 2.4611;
GPUglobalconstexpr() MassType MassDMinus = 1.86966;
GPUglobalconstexpr() MassType MassDPlus = 1.86966;
GPUglobalconstexpr() MassType MassDS = 1.96835;
GPUglobalconstexpr() MassType MassDSBar = 1.96835;
GPUglobalconstexpr() MassType MassDSStar = 2.1122;
GPUglobalconstexpr() MassType MassDS1 = 2.53511;
GPUglobalconstexpr() MassType MassDS1Star2700 = 2.714;
GPUglobalconstexpr() MassType MassDS1Star2860 = 2.859;
GPUglobalconstexpr() MassType MassDS2Star = 2.5691;
GPUglobalconstexpr() MassType MassDS3Star2860 = 2.86;
GPUglobalconstexpr() MassType MassDStar = 2.01026;
GPUglobalconstexpr() MassType MassDStar0 = 2.00685;
GPUglobalconstexpr() MassType MassChiC1 = 3.51067;
GPUglobalconstexpr() MassType MassJPsi = 3.0969;
GPUglobalconstexpr() MassType MassLambdaB0 = 5.6196;
GPUglobalconstexpr() MassType MassLambdaCPlus = 2.28646;
GPUglobalconstexpr() MassType MassLambdaCPlus2860 = 2.8561;
GPUglobalconstexpr() MassType MassLambdaCPlus2880 = 2.8816;
GPUglobalconstexpr() MassType MassLambdaCPlus2940 = 2.9396;
GPUglobalconstexpr() MassType MassOmegaC0 = 2.6952;
GPUglobalconstexpr() MassType MassK0Star892 = 0.89555;
GPUglobalconstexpr() MassType MassKPlusStar892 = 0.89167;
GPUglobalconstexpr() MassType MassPhi = 1.019461;
GPUglobalconstexpr() MassType MassSigmaC0 = 2.45375;
GPUglobalconstexpr() MassType MassSigmaCPlusPlus = 2.45397;
GPUglobalconstexpr() MassType MassSigmaCStar0 = 2.51848;
GPUglobalconstexpr() MassType MassSigmaCStarPlusPlus = 2.51841;
GPUglobalconstexpr() MassType MassX3872 = 3.87165;
GPUglobalconstexpr() MassType MassXi0 = 1.31486;
GPUglobalconstexpr() MassType MassXiB0 = 5.7919;
GPUglobalconstexpr() MassType MassXiCCPlusPlus = 3.62155;
GPUglobalconstexpr() MassType MassXiCPlus = 2.46771;
GPUglobalconstexpr() MassType MassXiC0 = 2.47044;
GPUglobalconstexpr() MassType MassXiC3055Plus = 3.0559;
GPUglobalconstexpr() MassType MassXiC3080Plus = 3.0772;
GPUglobalconstexpr() MassType MassXiC3055_0 = 3.059;
GPUglobalconstexpr() MassType MassXiC3080_0 = 3.0799;
GPUglobalconstexpr() MassType MassDeuteron = 1.87561294257;
GPUglobalconstexpr() MassType MassTriton = 2.80892113298;
GPUglobalconstexpr() MassType MassHelium3 = 2.80839160743;
GPUglobalconstexpr() MassType MassAlpha = 3.7273794066;
GPUglobalconstexpr() MassType MassLithium4 = 3.7513;
GPUglobalconstexpr() MassType MassHyperTriton = 2.991134;
GPUglobalconstexpr() MassType MassHyperHydrogen4 = 3.922434;
GPUglobalconstexpr() MassType MassHyperHelium4 = 3.921728;
GPUglobalconstexpr() MassType MassHyperHelium5 = 4.839961;
GPUglobalconstexpr() MassType MassHyperHelium4Sigma = 3.995;
GPUglobalconstexpr() MassType MassLambda1520_Py = 1.5195;
GPUglobalconstexpr() MassType MassK1_1270_0 = 1.253;
GPUglobalconstexpr() MassType MassK1_1270Plus = 1.272;
GPUglobalconstexpr() MassType MassCDeuteron = 3.226;

/// \brief Declarations of masses for particles in ROOT PDG_t
constexpr double MassDown = 0.00467;
constexpr double MassDownBar = 0.00467;
constexpr double MassUp = 0.00216;
constexpr double MassUpBar = 0.00216;
constexpr double MassStrange = 0.0934;
constexpr double MassStrangeBar = 0.0934;
constexpr double MassCharm = 1.27;
constexpr double MassCharmBar = 1.27;
constexpr double MassBottom = 4.18;
constexpr double MassBottomBar = 4.18;
constexpr double MassTop = 172.5;
constexpr double MassTopBar = 172.5;
constexpr double MassGluon = 0.0;
constexpr double MassElectron = 0.000510999;
constexpr double MassPositron = 0.000510999;
constexpr double MassNuE = 0.0;
constexpr double MassNuEBar = 0.0;
constexpr double MassMuonMinus = 0.1056584;
constexpr double MassMuonPlus = 0.1056584;
constexpr double MassNuMu = 0.0;
constexpr double MassNuMuBar = 0.0;
constexpr double MassTauMinus = 1.77686;
constexpr double MassTauPlus = 1.77686;
constexpr double MassNuTau = 0.0;
constexpr double MassNuTauBar = 0.0;
constexpr double MassGamma = 0.0;
constexpr double MassZ0 = 91.1876;
constexpr double MassWPlus = 80.377;
constexpr double MassWMinus = 80.377;
constexpr double MassPi0 = 0.1349768;
constexpr double MassK0Long = 0.497611;
constexpr double MassPiPlus = 0.1395704;
constexpr double MassPiMinus = 0.1395704;
constexpr double MassProton = 0.9382721;
constexpr double MassProtonBar = 0.9382721;
constexpr double MassNeutron = 0.9395654;
constexpr double MassNeutronBar = 0.9395654;
constexpr double MassK0Short = 0.497611;
constexpr double MassK0 = 0.497611;
constexpr double MassK0Bar = 0.497611;
constexpr double MassKPlus = 0.493677;
constexpr double MassKMinus = 0.493677;
constexpr double MassLambda0 = 1.115683;
constexpr double MassLambda0Bar = 1.115683;
constexpr double MassLambda1520 = 1.519;
constexpr double MassSigmaMinus = 1.197449;
constexpr double MassSigmaBarPlus = 1.197449;
constexpr double MassSigmaPlus = 1.18937;
constexpr double MassSigmaBarMinus = 1.18937;
constexpr double MassSigma0 = 1.192642;
constexpr double MassSigma0Bar = 1.192642;
constexpr double MassXiMinus = 1.32171;
constexpr double MassXiPlusBar = 1.32171;
constexpr double MassOmegaMinus = 1.67245;
constexpr double MassOmegaPlusBar = 1.67245;
GPUglobalconstexpr() MassType MassDown = 0.00467;
GPUglobalconstexpr() MassType MassDownBar = 0.00467;
GPUglobalconstexpr() MassType MassUp = 0.00216;
GPUglobalconstexpr() MassType MassUpBar = 0.00216;
GPUglobalconstexpr() MassType MassStrange = 0.0934;
GPUglobalconstexpr() MassType MassStrangeBar = 0.0934;
GPUglobalconstexpr() MassType MassCharm = 1.27;
GPUglobalconstexpr() MassType MassCharmBar = 1.27;
GPUglobalconstexpr() MassType MassBottom = 4.18;
GPUglobalconstexpr() MassType MassBottomBar = 4.18;
GPUglobalconstexpr() MassType MassTop = 172.5;
GPUglobalconstexpr() MassType MassTopBar = 172.5;
GPUglobalconstexpr() MassType MassGluon = 0.0;
GPUglobalconstexpr() MassType MassElectron = 0.000510999;
GPUglobalconstexpr() MassType MassPositron = 0.000510999;
GPUglobalconstexpr() MassType MassNuE = 0.0;
GPUglobalconstexpr() MassType MassNuEBar = 0.0;
GPUglobalconstexpr() MassType MassMuonMinus = 0.1056584;
GPUglobalconstexpr() MassType MassMuonPlus = 0.1056584;
GPUglobalconstexpr() MassType MassNuMu = 0.0;
GPUglobalconstexpr() MassType MassNuMuBar = 0.0;
GPUglobalconstexpr() MassType MassTauMinus = 1.77686;
GPUglobalconstexpr() MassType MassTauPlus = 1.77686;
GPUglobalconstexpr() MassType MassNuTau = 0.0;
GPUglobalconstexpr() MassType MassNuTauBar = 0.0;
GPUglobalconstexpr() MassType MassGamma = 0.0;
GPUglobalconstexpr() MassType MassZ0 = 91.1876;
GPUglobalconstexpr() MassType MassWPlus = 80.377;
GPUglobalconstexpr() MassType MassWMinus = 80.377;
GPUglobalconstexpr() MassType MassPi0 = 0.1349768;
GPUglobalconstexpr() MassType MassK0Long = 0.497611;
GPUglobalconstexpr() MassType MassPiPlus = 0.1395704;
GPUglobalconstexpr() MassType MassPiMinus = 0.1395704;
GPUglobalconstexpr() MassType MassProton = 0.9382721;
GPUglobalconstexpr() MassType MassProtonBar = 0.9382721;
GPUglobalconstexpr() MassType MassNeutron = 0.9395654;
GPUglobalconstexpr() MassType MassNeutronBar = 0.9395654;
GPUglobalconstexpr() MassType MassK0Short = 0.497611;
GPUglobalconstexpr() MassType MassK0 = 0.497611;
GPUglobalconstexpr() MassType MassK0Bar = 0.497611;
GPUglobalconstexpr() MassType MassKPlus = 0.493677;
GPUglobalconstexpr() MassType MassKMinus = 0.493677;
GPUglobalconstexpr() MassType MassLambda0 = 1.115683;
GPUglobalconstexpr() MassType MassLambda0Bar = 1.115683;
GPUglobalconstexpr() MassType MassLambda1520 = 1.519;
GPUglobalconstexpr() MassType MassSigmaMinus = 1.197449;
GPUglobalconstexpr() MassType MassSigmaBarPlus = 1.197449;
GPUglobalconstexpr() MassType MassSigmaPlus = 1.18937;
GPUglobalconstexpr() MassType MassSigmaBarMinus = 1.18937;
GPUglobalconstexpr() MassType MassSigma0 = 1.192642;
GPUglobalconstexpr() MassType MassSigma0Bar = 1.192642;
GPUglobalconstexpr() MassType MassXiMinus = 1.32171;
GPUglobalconstexpr() MassType MassXiPlusBar = 1.32171;
GPUglobalconstexpr() MassType MassOmegaMinus = 1.67245;
GPUglobalconstexpr() MassType MassOmegaPlusBar = 1.67245;

// END OF THE GENERATED BLOCK

// legacy names
constexpr double MassPhoton = MassGamma;
constexpr double MassMuon = MassMuonMinus;
constexpr double MassPionCharged = MassPiPlus;
constexpr double MassPionNeutral = MassPi0;
constexpr double MassKaonCharged = MassKPlus;
constexpr double MassKaonNeutral = MassK0;
constexpr double MassLambda = MassLambda0;
constexpr double MassHyperhydrog4 = MassHyperHydrogen4;
constexpr double MassHyperhelium4 = MassHyperHelium4;
constexpr double MassHyperhelium4sigma = MassHyperHelium4Sigma;
GPUglobalconstexpr() MassType MassPhoton = MassGamma;
GPUglobalconstexpr() MassType MassMuon = MassMuonMinus;
GPUglobalconstexpr() MassType MassPionCharged = MassPiPlus;
GPUglobalconstexpr() MassType MassPionNeutral = MassPi0;
GPUglobalconstexpr() MassType MassKaonCharged = MassKPlus;
GPUglobalconstexpr() MassType MassKaonNeutral = MassK0;
GPUglobalconstexpr() MassType MassLambda = MassLambda0;
GPUglobalconstexpr() MassType MassHyperhydrog4 = MassHyperHydrogen4;
GPUglobalconstexpr() MassType MassHyperhelium4 = MassHyperHelium4;
GPUglobalconstexpr() MassType MassHyperhelium4sigma = MassHyperHelium4Sigma;

// Light speed
constexpr float LightSpeedCm2S = 299792458.e2; // C in cm/s
constexpr float LightSpeedCm2NS = LightSpeedCm2S * 1e-9; // C in cm/ns
constexpr float LightSpeedCm2PS = LightSpeedCm2S * 1e-12; // C in cm/ps
GPUglobalconstexpr() float LightSpeedCm2S = 299792458.e2; // C in cm/s
GPUglobalconstexpr() float LightSpeedCm2NS = LightSpeedCm2S * 1e-9; // C in cm/ns
GPUglobalconstexpr() float LightSpeedCm2PS = LightSpeedCm2S * 1e-12; // C in cm/ps

// Light speed inverse
constexpr float invLightSpeedCm2PS = 1. / LightSpeedCm2PS; // 1/C in ps/cm
GPUglobalconstexpr() float invLightSpeedCm2PS = 1. / LightSpeedCm2PS; // 1/C in ps/cm

} // namespace o2::constants::physics

Expand Down
4 changes: 2 additions & 2 deletions Common/Constants/include/CommonConstants/make_pdg_header.py
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Original file line number Diff line number Diff line change
Expand Up @@ -169,9 +169,9 @@ def mass(code):
return dbPdg.Mass(code, success)


def declare_mass(pdg, mass_type="double") -> str:
def declare_mass(pdg, mass_type="MassType") -> str:
"""Returns a C++ declaration of a particle mass constant."""
return f"constexpr {mass_type} Mass{pdg.name[1:]} = {mass(pdg.value)};"
return f"GPUglobalconstexpr() {mass_type} Mass{pdg.name[1:]} = {mass(pdg.value)};"


def main():
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