Bendtorch.attn_bwd: def of bendtorch@1.3.0.0
Import: import bendtorch@1.3.0.0/main.bend as Bendtorch
Lines 3009-3012 of bendtorch@1.3.0.0/main.bend: https://jend.leeeet.dev/read.txt?path=bendtorch@1.3.0.0/main.bend&start_line=3009&end_line=3012

import Base
import bend-ml-tensor-array@0.1.18.0/main.bend as TA

def attn_bwd(+n: Nat, +w: Nat, +kvw: Nat, +dm: AttnDims, s: AttnS, dy: TA.Mat<n, w>) -> Bwd<Unit, Two<TA.Mat<n, w>, Two<TA.Mat<n, kvw>, TA.Mat<n, kvw>>>>:
  match dm s dy:
    case AttnDims{+b, +t, +kv, +g, +hd, +sc} AttnS{q, k, v} TA.Mat{d}:
      ab2(n, w, kvw, b, kv, dm_of(dm), bslices(b, 0n, t, w, kvw, kv, g, hd, BL{q, k, v, d, Nil{}}))

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  https://jend.leeeet.dev/definition.txt?path=bend-ml-tensor-array@0.1.19.0/main.bend&name=Mat
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=AttnDims
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=AttnS
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=BL
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=Bwd
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=Two
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=ab2
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=bslices
  https://jend.leeeet.dev/definition.txt?path=bendtorch@1.3.0.0/main.bend&name=dm_of