mirror of
https://igit.ific.uv.es/alramos/latticegpu.jl.git
synced 2025-05-15 19:53:41 +02:00
4eed0ebb42
At this moment the zfl_* routines only perform the Symanzik flow. The extra term has to be added, but it should not impact timmings
339 lines
8.5 KiB
Julia
339 lines
8.5 KiB
Julia
###
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### "THE BEER-WARE LICENSE":
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### Alberto Ramos wrote this file. As long as you retain this
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### notice you can do whatever you want with this stuff. If we meet some
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### day, and you think this stuff is worth it, you can buy me a beer in
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### return. <alberto.ramos@cern.ch>
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###
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### file: YMact.jl
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### created: Mon Jul 12 18:31:19 2021
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###
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function krnl_impr!(plx, U::AbstractArray{T}, c0, c1, lp::SpaceParm{N,M,D}) where {T,N,M,D}
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b, r = CUDA.threadIdx().x, CUDA.blockIdx().x
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Ush = @cuStaticSharedMem(T, (D,2))
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plx[b,r] = zero(plx[b,r])
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for id1 in 1:N-1
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bu1, ru1 = up((b, r), id1, lp)
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Ush[b,1] = U[b,id1,r]
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for id2 = id1+1:N
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bu2, ru2 = up((b, r), id2, lp)
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Ush[b,2] = U[b,id2,r]
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sync_threads()
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# H2 staple
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(b1, r1) = up((b,r), id1, lp)
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if r1 == r
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ga = Ush[b1,1]
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else
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ga = U[b1,id1,r1]
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end
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(b2, r2) = up((b1,r1), id1, lp)
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if r2 == r
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gb = Ush[b2,2]
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else
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gb = U[b2,id2,r2]
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end
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(b2, r2) = up((b1,r1), id2, lp)
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if r2 == r
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gc = Ush[b2,1]
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else
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gc = U[b2,id1,r2]
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end
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h2 = (ga*gb)/gc
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# H3 staple
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(b1, r1) = up((b,r), id2, lp)
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if r1 == r
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ga = Ush[b1,2]
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else
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ga = U[b1,id2,r1]
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end
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(b2, r2) = up((b1,r1), id2, lp)
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if r2 == r
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gb = Ush[b2,1]
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else
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gb = U[b2,id1,r2]
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end
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(b2, r2) = up((b1,r1), id1, lp)
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if r2 == r
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gc = Ush[b2,2]
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else
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gc = U[b2,id2,r2]
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end
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h3 = (ga*gb)/gc
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# END staples
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if ru2 == r
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gb = Ush[bu2,1]
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else
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gb = U[bu2,id1,ru2]
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end
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if ru1 == r
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ga = Ush[bu1,2]
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else
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ga = U[bu1,id2,ru1]
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end
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g2 = Ush[b,2]\Ush[b,1]
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plx[b,r] += c0*tr(g2*ga/gb) + c1*( tr(g2*h2/gb) + tr(g2*ga/h3))
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end
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end
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return nothing
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end
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function krnl_plaq!(plx, U::AbstractArray{T}, lp::SpaceParm{N,M,D}) where {T,N,M,D}
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b, r = CUDA.threadIdx().x, CUDA.blockIdx().x
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Ush = @cuStaticSharedMem(T, (D,2))
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plx[b,r] = zero(plx[b,r])
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for id1 in 1:N-1
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bu1, ru1 = up((b, r), id1, lp)
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Ush[b,1] = U[b,id1,r]
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for id2 = id1+1:N
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bu2, ru2 = up((b, r), id2, lp)
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Ush[b,2] = U[b,id2,r]
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sync_threads()
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if ru1 == r
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gt1 = Ush[bu1,2]
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else
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gt1 = U[bu1,id2,ru1]
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end
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if ru2 == r
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gt2 = Ush[bu2,1]
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else
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gt2 = U[bu2,id1,ru2]
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end
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plx[b,r] += tr(Ush[b,1]*gt1 / (Ush[b,2]*gt2))
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end
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end
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return nothing
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end
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function krnl_force_wilson_pln!(frc1, frc2, U::AbstractArray{T}, ipl, lp::SpaceParm{N,M,D}) where {T,N,M,D}
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b, r = CUDA.threadIdx().x, CUDA.blockIdx().x
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Ush = @cuStaticSharedMem(T, (D,2))
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@inbounds begin
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id1, id2 = lp.plidx[ipl]
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bu1, ru1 = up((b, r), id1, lp)
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bu2, ru2 = up((b, r), id2, lp)
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Ush[b,1] = U[b,id1,r]
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Ush[b,2] = U[b,id2,r]
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sync_threads()
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if ru2 == r
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gt2 = Ush[bu2,1]
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else
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gt2 = U[bu2,id1,ru2]
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end
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if ru1 == r
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gt1 = Ush[bu1,2]
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else
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gt1 = U[bu1,id2,ru1]
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end
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g1 = gt1/gt2
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g2 = Ush[b,2]\Ush[b,1]
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X = projalg(Ush[b,1]*g1/Ush[b,2])
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frc1[b ,id1, r ] -= X
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frc1[b ,id2, r ] += X
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frc2[bu1,id2,ru1] -= projalg(g1*g2)
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frc2[bu2,id1,ru2] += projalg(g2*g1)
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end
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return nothing
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end
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function krnl_force_impr_pln!(frc1, frc2, U::AbstractArray{T}, c0, c1, ipl, lp::SpaceParm{N,M,D}) where {T,N,M,D}
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b, r = CUDA.threadIdx().x, CUDA.blockIdx().x
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Ush = @cuStaticSharedMem(T, (D,2))
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@inbounds begin
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id1, id2 = lp.plidx[ipl]
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bu1, ru1 = up((b, r), id1, lp)
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bu2, ru2 = up((b, r), id2, lp)
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Ush[b,1] = U[b,id1,r]
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Ush[b,2] = U[b,id2,r]
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sync_threads()
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# H1 staple
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(b1, r1) = dw((b,r), id2, lp)
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if r1 == r
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ga = Ush[b1,2]
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gb = Ush[b1,1]
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else
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ga = U[b1,id2,r1]
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gb = U[b1,id1,r1]
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end
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(b2, r2) = up((b1,r1), id1, lp)
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if r2 == r
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gc = Ush[b2,2]
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else
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gc = U[b2,id2,r2]
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end
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h1 = (ga\gb)*gc
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# H2 staple
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(b1, r1) = up((b,r), id1, lp)
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if r1 == r
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ga = Ush[b1,1]
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else
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ga = U[b1,id1,r1]
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end
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(b2, r2) = up((b1,r1), id1, lp)
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if r2 == r
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gb = Ush[b2,2]
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else
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gb = U[b2,id2,r2]
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end
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(b2, r2) = up((b1,r1), id2, lp)
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if r2 == r
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gc = Ush[b2,1]
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else
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gc = U[b2,id1,r2]
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end
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h2 = (ga*gb)/gc
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# H3 staple
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(b1, r1) = up((b,r), id2, lp)
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if r1 == r
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ga = Ush[b1,2]
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else
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ga = U[b1,id2,r1]
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end
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(b2, r2) = up((b1,r1), id2, lp)
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if r2 == r
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gb = Ush[b2,1]
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else
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gb = U[b2,id1,r2]
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end
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(b2, r2) = up((b1,r1), id1, lp)
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if r2 == r
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gc = Ush[b2,2]
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else
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gc = U[b2,id2,r2]
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end
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h3 = (ga*gb)/gc
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# H4 staple
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(b1, r1) = dw((b,r), id1, lp)
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if r1 == r
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ga = Ush[b1,1]
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gb = Ush[b1,2]
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else
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ga = U[b1,id1,r1]
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gb = U[b1,id2,r1]
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end
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(b2, r2) = up((b1,r1), id2, lp)
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if r2 == r
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gc = Ush[b2,1]
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else
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gc = U[b2,id1,r2]
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end
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h4 = (ga\gb)*gc
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# END staples
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if ru2 == r
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gb = Ush[bu2,1]
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else
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gb = U[bu2,id1,ru2]
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end
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if ru1 == r
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ga = Ush[bu1,2]
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else
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ga = U[bu1,id2,ru1]
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end
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g1 = ga/gb
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g2 = Ush[b,2]\Ush[b,1]
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X = c0*projalg(Ush[b,1]*g1/Ush[b,2]) + c1 * (projalg(Ush[b,1]*h2/(Ush[b,2]*gb)) +
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projalg(Ush[b,1]*ga/(Ush[b,2]*h3)))
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frc1[b,id1,r] -= X + c1*projalg(Ush[b,1]*g1/h4)
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frc1[b,id2,r] += X + c1*projalg(h1*g1/Ush[b,2])
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frc2[bu1,id2,ru1] -= c0*projalg(g1*g2) + c1*( projalg((ga/h3)*g2) +
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projalg((g1/h4)*Ush[b,1]) +
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projalg((g1/Ush[b,2])*h1) )
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frc2[bu2,id1,ru2] += c0*projalg(g2*g1) + c1*( projalg((Ush[b,2]\h1)*g1) +
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projalg(g2*h2/gb) +
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projalg(h4\Ush[b,1]*g1) )
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end
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return nothing
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end
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"""
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function force_wilson(ymws::YMworkspace, U, lp::SpaceParm)
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Computes the force deriving from the Wilson plaquette action, without
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the prefactor 1/g0^2, and assign it to the workspace force `ymws.frc1`
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"""
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function force_gauge(ymws::YMworkspace, U, c0, lp::SpaceParm)
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if abs(c0-1) < 1.0E-10
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force_wilson_pln!(ymws.frc1, ymws.frc2, U, lp::SpaceParm)
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else
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force_wilson_pln!(ymws.frc1, ymws.frc2, U, lp::SpaceParm, c0)
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end
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return nothing
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end
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force_wilson(ymws::YMworkspace, U, lp::SpaceParm) = force_gauge(ymws, U, 1, lp)
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function force_wilson_pln!(frc1, ftmp, U, lp::SpaceParm, c0=1)
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fill!(frc1, zero(eltype(frc1)))
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fill!(ftmp, zero(eltype(ftmp)))
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if c0 == 1
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for i in 1:lp.npls
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CUDA.@sync begin
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CUDA.@cuda threads=lp.bsz blocks=lp.rsz krnl_force_wilson_pln!(frc1,ftmp,U,i,lp)
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end
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end
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else
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for i in 1:lp.npls
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CUDA.@sync begin
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CUDA.@cuda threads=lp.bsz blocks=lp.rsz krnl_force_impr_pln!(frc1,ftmp,U,c0,(1-c0)/8,i,lp)
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end
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end
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end
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frc1 .= frc1 .+ ftmp
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return nothing
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end
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