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============================
Hithere\u{1F44B}.LookslikeyouarerunningTensorFlow.jsinNode.js.Tospeedthingsupdramatically,installournodebackend,whichbindstoTensorFlowC++,byrunningnpmi@tensorflow/tfjs-node,ornpmi@tensorflow/tfjs-node-gpuifyouhaveCUDA.Thencallrequire('@tensorflow/tfjs-node');(-gpusuffixforCUDA)atthestartofyourprogram.Visithttps://github.com/tensorflow/tfjs-node for more details.
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intindex=row*${r}+col*${s}+depth+${c};
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}
`}function vpe(e){let t=e.shapeInfo.logicalShape,n=t.length,a=e.name,r="get"+a.charAt(0).toUpperCase()+a.slice(1),s=e.shapeInfo.texShape,i=[Math.ceil(s[0]/2),Math.ceil(s[1]/2)],o=i[0],l=i[1],u=Math.ceil(t[n-1]/2),d=u*Math.ceil(t[n-2]/2),h="int b, int row, int col",p=`b*${d}+(row/2)*${u}+(col/2)`;for(let m=2;m<n-1;m++)h=`intb${m},`+h,d*=t[n-m-1],p=`b${m}*${d}+`+p;let c=Wn();return`
indices.shape[0]=${o}`);let g=k.getArrayFromDType(n,0),y=k.getArrayFromDType(r,0);return[g,[0,h],y,u,d]}let p=!0,c=0,m=new Array(l).fill(0);for(let g=0;g<o;++g){let y=e[g*h];if(y<0)throw new Error(`indices(${g},0)isinvalid:${y}<0`);if(y>=l)throw new Error(`indices(${g},0)isinvalid:${y}>=${l}`);++m[y],p=p&&y>=c,c=y}let f=!0;for(let g=0;g<l;++g){let y=m[g]===0;u[g]=y,f=f&&!y,m[g]=Math.max(m[g],1),g>0&&(m[g]+=m[g-1])}if(f&&p){let g=e,y=a;for(let A=0;A<o;++A)d[A]=A;return[g,[o,h],y,u,d]}else{let g=m[l-1],y=k.getArrayFromDType(n,g*h),A=k.getArrayFromDType(r,g),x=new Array(l).fill(0);for(let v=0;v<o;++v){let b=e[v*h],w=x[b],I=(b===0?0:m[b-1])+w;x[b]++;for(let T=0;T<h;++T)y[I*h+T]=e[v*h+T];A[I]=a[v],d[v]=I}for(let v=0;v<l;++v)if(x[v]===0){let b=v===0?0:m[v-1];y[b*h+0]=v;for(let w=1;w<h;++w)y[b*h+w]=0;A[b]=i}return[y,[g,h],A,u,d]}}function jpe(e,t,n,a,r){let s=k.sizeFromShape(a),i=t[0],o=r.length,l=[],u=1,d=-1;for(let g=0;g<o;++g){let y=r[g];if(y===-1){if(d!==-1)throw new Error(`onlyoneoutputdimensionmaybe-1,notboth${d}and${g}`);d=g,l.push(1)}else{if(y<0)throw new Error(`size${g}mustbenon-negative,not${y}`);u*=y,l.push(y)}}if(d!==-1){if(u<=0)throw new Error("reshape cannot infer the missing input size for an empty tensor unless all specified input sizes are non-zero");let g=Math.trunc(s/u);if(u*g!==s)throw new Error(`InputtoreshapeisaSparseTensorwith${s}
densevalues,buttherequestedshaperequiresamultipleof${u}.inputShape=${a}outputShape=${l}`);l[d]=g}let h=k.sizeFromShape(l);if(h!==s)throw new Error(`Inputtoreshapeisatensorwith${s}densevalues,buttherequestedshapehas${h}.inputShape=${a}outputShape=${l}`);let p=a.length,c=[];if(p>0){c[p-1]=1;for(let g=p-2;g>=0;--g)c[g]=c[g+1]*a[g+1]}let m=[];if(o>0){m[o-1]=1;for(let g=o-2;g>=0;--g)m[g]=m[g+1]*l[g+1]}let f=k.getArrayFromDType(n,i*o);for(let g=0;g<i;++g){let y=0;for(let A=0;A<p;++A)y+=e[g*p+A]*c[A];for(let A=0;A<o;++A)f[g*o+A]=Math.trunc(y/m[A]),y%=m[A]}return[f,[i,o],l]}function Hpe(e,t,n,a,r,s=!1,i=0){let o=a.length;if(o!==r.length)throw new Error("segmentIds and indices should have same size.");let l=[t[0],e.length/t[0]],u=l[1],d=o>0?r[o-1]+1:0;if(d<0)throw new Error("segment ids must be >= 0");let h=t.slice();h[0]=d;let p=h.reduce((A,x)=>A*x,1),c=k.getArrayFromDType(n,p);if(o===0)return d>0&&c.fill(i),[c,h];if(d<=0)throw new Error("segment ids must be >= 0");let m=0,f=1,g=0,y=r[m];for(;;){let A=0;if(f<o){if(A=r[f],y===A){++f;continue}if(y>=A)throw new Error("segment ids are not increasing")}if(y<0||y>=d)throw new Error(`Segmentid${y}outofrange[0,${d}),possiblybecausesegmentIdsinputisnotsorted.`);y>g&&c.fill(i,g*u,y*u);for(let x=m;x<f;++x){let v=a[x];if(v<0||v>=l[0])throw new Error(`Bad:indices[${x}]==${a[x]}outofrange[0,${l[0]})`);for(let b=0;b<u;b++)c[y*u+b]+=e[v*u+b]}if(s)for(let x=0;x<u;x++)c[y*u+x]/=f-m;if(m=f,++f,g=y+1,y=A,f>o)break}return g<d&&c.fill(i,g*u,d*u),[c,h]}var lE=Pa((e,t)=>{let n=e-t;return n*n}),r7e=Ya(_i,lE);function Gpe(e,t,n,a){let r=Pe(e,t.dtype);for(let s=0;s<r.size;s++){let i=r.indexToLoc(s),o=new Array(i.length);for(let l=0;l<o.length;l++)o[l]=i[l]*n[l]+a[l];r.set(t.get(...o),...i)}return r}var qpe=class{constructor(e,t,n,a,r,s){this.separator=k.encodeString(e),this.nGramWidths=t,this.leftPad=k.encodeString(n),this.rightPad=k.encodeString(a),this.padWidth=r,this.preserveShort=s}getPadWidth(e){return Math.min(this.padWidth<0?e-1:this.padWidth,e-1)}getNumNGrams(e,t){let n=this.getPadWidth(t);return Math.max(0,e+2*n-t+1)}createNGrams(e,t,n,a,r,s){for(let i=0;i<r;++i){let o=this.getPadWidth(s),l=Math.max(0,o-i),u=Math.max(0,o-(r-(i+1))),d=s-(l+u),h=t+(l>0?0:i-o),p=0;p+=l*this.leftPad.length;for(let g=0;g<d;++g)p+=e[h+g].length;p+=u*this.rightPad.length,p+=(l+u+d-1)*this.separator.length,n[a+i]=new Uint8Array(p);let c=n[a+i],m=0,f=g=>g.forEach(y=>c[m++]=y);for(let g=0;g<l;++g)f(this.leftPad),f(this.separator);for(let g=0;g<d-1;++g)f(e[h+g]),f(this.separator);if(d>0){f(e[h+d-1]);for(let g=0;g<u;++g)f(this.separator),f(this.rightPad)}else{for(let g=0;g<u-1;++g)f(this.rightPad),f(this.separator);f(this.rightPad)}}}compute(e,t){let n=e.length,a=t.length;if(a>0){let o=t[0];if(o!==0)throw new Error(`Firstsplitvaluemustbe0,got${o}`);for(let l=1;l<a;++l){let u=t[l]>=o;if(u=u&&t[l]<=n,!u)throw new Error(`Invalidsplitvalue${t[l]},mustbein[${o},${n}]`);o=t[l]}if(o!==n)throw new Error(`Lastsplitvaluemustbedatasize.Expected${n},got${o}`)}let r=a-1,s=k.getArrayFromDType("int32",a);if(n===0||a===0){let o=new Array(n);for(let l=0;l<=r;++l)s[l]=0;return[o,s]}s[0]=0;for(let o=1;o<=r;++o){let l=t[o]-t[o-1],u=0;this.nGramWidths.forEach(d=>{u+=this.getNumNGrams(l,d)}),this.preserveShort&&l>0&&u===0&&(u=1),s[o]=s[o-1]+u}let i=new Array(s[r]);for(let o=0;o<r;++o){let l=t[o],u=s[o];if(this.nGramWidths.forEach(d=>{let h=t[o+1]-t[o],p=this.getNumNGrams(h,d);this.createNGrams(e,l,i,u,p,d),u+=p}),this.preserveShort&&u===s[o]){let d=t[o+1]-t[o];if(d===0)continue;let h=d+2*this.padWidth,p=1;this.createNGrams(e,l,i,u,p,h)}}return[i,s]}};function Kpe(e,t,n,a,r,s,i,o){return new qpe(n,a,r,s,i,o).compute(e,t)}function Xpe(e,t,n){if(!e.length)return[];if(t.length===0){let s=new Array(e.length);for(let i=0;i<e.length;++i)s[i]=e.subarray(i,i+1);return s}if(t.length===1){let s=t[0],i=[],o=e.indexOf(s);for(;o!==-1;){let l=e.subarray(0,o);(!n||l.length!==0)&&i.push(l),e=e.subarray(o+1),o=e.indexOf(s)}return(!n||e.length!==0)&&i.push(e),i}let a=[],r=0;for(
`}var Hce=class{constructor(e){this.gpgpu=e,this.numUsedTextures=0,this.numFreeTextures=0,this._numBytesAllocated=0,this._numBytesFree=0,this.freeTextures={},this.logEnabled=!1,this.usedTextures={}}acquireTexture(e,t,n){let a=gE(t,n),r=yE(e,a,n);r in this.freeTextures||(this.freeTextures[r]=[]),r in this.usedTextures||(this.usedTextures[r]=[]);let s=mE(e,a,this.gpgpu.gl,this.gpgpu.textureConfig,n);if(this.freeTextures[r].length>0){this.numFreeTextures--,this.numUsedTextures++,this._numBytesFree-=s,this.log();let o=this.freeTextures[r].shift();return this.usedTextures[r].push(o),o}let i;return a===Nn.PACKED_2X2_FLOAT32?i=this.gpgpu.createPackedMatrixTexture(e[0],e[1]):a===Nn.PACKED_2X2_FLOAT16?i=this.gpgpu.createFloat16PackedMatrixTexture(e[0],e[1]):a===Nn.UNPACKED_FLOAT32?i=this.gpgpu.createFloat32MatrixTexture(e[0],e[1]):a===Nn.UNPACKED_FLOAT16?i=this.gpgpu.createFloat16MatrixTexture(e[0],e[1]):a===Nn.PACKED_4X1_UNSIGNED_BYTE&&(i=this.gpgpu.createUnsignedBytesMatrixTexture(e[0],e[1])),this.usedTextures[r].push(i),this.numUsedTextures++,this._numBytesAllocated+=s,this.log(),i}releaseTexture(e,t,n,a){if(this.freeTextures==null)return;let r=gE(n,a),s=yE(t,r,a);s in this.freeTextures||(this.freeTextures[s]=[]);let i=mE(t,r,this.gpgpu.gl,this.gpgpu.textureConfig,a),o=se().get("WEBGL_DELETE_TEXTURE_THRESHOLD");o!==-1&&this._numBytesAllocated>o?(this.gpgpu.deleteMatrixTexture(e),this._numBytesAllocated-=i):(this.freeTextures[s].push(e),this.numFreeTextures++,this._numBytesFree+=i),this.numUsedTextures--;let l=this.usedTextures[s],u=l.indexOf(e);if(u<0)throw new Error("Cannot release a texture that was never provided by this texture manager");l.splice(u,1),this.log()}log(){if(!this.logEnabled)return;let e=this.numFreeTextures+this.numUsedTextures;console.log("Free/Used",`${this.numFreeTextures}/${this.numUsedTextures}`,`(${e})`);let t=this._numBytesFree/this._numBytesAllocated;console.log(`Bytesallocated:${this._numBytesAllocated}`),console.log(`Bytesunused:${this._numBytesFree}(${Math.round(100*t)}%)`)}get numBytesAllocated(){return this._numBytesAllocated}get numBytesFree(){return this._numBytesFree}getNumUsedTextures(){return this.numUsedTextures}getNumFreeTextures(){return this.numFreeTextures}dispose(){if(this.freeTextures!=null){for(let e in this.freeTextures)this.freeTextures[e].forEach(t=>{this.gpgpu.deleteMatrixTexture(t)});for(let e in this.usedTextures)this.usedTextures[e].forEach(t=>{this.gpgpu.deleteMatrixTexture(t)});this.freeTextures=null,this.usedTextures=null,this.numUsedTextures=0,this.numFreeTextures=0,this._numBytesAllocated=0,this._numBytesFree=0}}};function Gce(e,t){let n=e;if(t===n.R32F)return 4;if(t===n.R16F)return 2;if(t===n.RGBA32F||t===e.RGBA)return 16;if(t===n.RGBA16F)return 8;throw new Error(`Unknowninternalformat${t}`)}function mE(e,t,n,a,r){let s=qce(t,a),i;if(r){let[l,u]=fu(e[0],e[1]);i=l*u}else{let[l,u]=sp(e[0],e[1]);i=l*u}let o=Gce(n,s);return i*o}function qce(e,t){switch(e){case Nn.PACKED_2X2_FLOAT32:return Q5(t);case Nn.PACKED_2X2_FLOAT16:return eb(t);case Nn.UNPACKED_FLOAT32:return Z5(t);case Nn.UNPACKED_FLOAT16:return Y5(t);case Nn.PACKED_4X1_UNSIGNED_BYTE:return J5(t);default:throw new Error(`Unknownphysicaltexturetype${e}`)}}function Kce(e){return se().getBool("WEBGL_RENDER_FLOAT32_ENABLED")?e?Nn.PACKED_2X2_FLOAT32:Nn.UNPACKED_FLOAT32:e?Nn.PACKED_2X2_FLOAT16:Nn.UNPACKED_FLOAT16}function gE(e,t){if(e===_a.UPLOAD)return Nn.PACKED_2X2_FLOAT32;if(e===_a.RENDER||e==null)return Kce(t);if(e===_a.DOWNLOAD||e===_a.PIXELS)return Nn.PACKED_4X1_UNSIGNED_BYTE;throw new Error(`Unknownlogicaltexturetype${e}`)}function yE(e,t,n){return`${e[0]}_${e[1]}_${t}_${n}`}var Qs=class{constructor(e,t){this.variableNames=["A"],this.outputShape=e,this.userCode=`
`}},ife=us.whereImpl,ofe=1e-7,lfe=1e-4,ob={};function ufe(e){return e in ob||(ob[e]={}),ob[e]}var dfe=()=>se().getNumber("CPU_HANDOFF_SIZE_THRESHOLD"),hfe=600;function pfe(){return se().global.screen==null?1024:se().global.screen.height*se().global.screen.width*window.devicePixelRatio*hfe/1024/1024}var xE=class extends Wc{constructor(e){super();if(this.pendingRead=new WeakMap,this.pendingDisposal=new WeakSet,this.dataRefCount=new WeakMap,this.numBytesInGPU=0,this.uploadWaitMs=0,this.downloadWaitMs=0,this.lastGlFlushTime=0,this.warnedAboutMemory=!1,this.pendingDeletes=0,this.disposed=!1,!se().getBool("HAS_WEBGL"))throw new Error("WebGL is not supported on this device");if(e==null){let t=Pr(se().getNumber("WEBGL_VERSION"));this.binaryCache=ufe(se().getNumber("WEBGL_VERSION")),this.gpgpu=new W0(t),this.canvas=t.canvas,this.gpgpuCreatedLocally=!0}else this.gpgpu=e,this.binaryCache={},this.gpgpuCreatedLocally=!1,this.canvas=e.gl.canvas;this.textureManager=new Hce(this.gpgpu),this.numMBBeforeWarning=pfe(),this.texData=new f1(this,Ps())}nextDataId(){return xE.nextDataId++}numDataIds(){return this.texData.numDataIds()-this.pendingDeletes}write(e,t,n){if((se().getBool("WEBGL_CHECK_NUMERICAL_PROBLEMS")||se().getBool("DEBUG"))&&this.checkNumericalProblems(e),n==="complex64"&&e!=null)throw new Error("Cannot write to a complex64 dtype. Please use tf.complex(real, imag).");let a={id:this.nextDataId()};return this.texData.set(a,{shape:t,dtype:n,values:e,usage:_a.UPLOAD,refCount:1}),a}refCount(e){return this.texData.has(e)?this.texData.get(e).refCount:0}incRef(e){let t=this.texData.get(e);t.refCount++}decRef(e){if(this.texData.has(e)){let t=this.texData.get(e);t.refCount--}}move(e,t,n,a,r){if(se().getBool("DEBUG")&&this.checkNumericalProblems(t),a==="complex64")throw new Error("Cannot write to a complex64 dtype. Please use tf.complex(real, imag).");this.texData.set(e,{shape:n,dtype:a,values:t,usage:_a.UPLOAD,refCount:r})}disposeIntermediateTensorInfo(e){this.disposeData(e.dataId)}readSync(e){let t=this.texData.get(e),{values:n,dtype:a,complexTensorInfos:r,slice:s,shape:i,isPacked:o}=t;if(s!=null){let h;o?h=new wu(i,V0):h=new Qs(i,V0);let p=this.runWebGLProgram(h,[{dataId:e,shape:i,dtype:a}],a),c=this.readSync(p.dataId);return this.disposeIntermediateTensorInfo(p),c}if(n!=null)return this.convertAndCacheOnCPU(e);if(a==="string")return n;let l=this.activeTimers!=null,u;l&&(u=k.now());let d;if(a==="complex64"){let h=this.readSync(r.real.dataId),p=this.readSync(r.imag.dataId);d=M.mergeRealAndImagArrays(h,p)}else d=this.getValuesFromTexture(e);return l&&(this.downloadWaitMs+=k.now()-u),this.convertAndCacheOnCPU(e,d)}async read(e){if(this.pendingRead.has(e)){let c=this.pendingRead.get(e);return new Promise(m=>c.push(m))}let t=this.texData.get(e),{values:n,shape:a,slice:r,dtype:s,complexTensorInfos:i,isPacked:o}=t;if(r!=null){let c;o?c=new wu(a,V0):c=new Qs(a,V0);let m=this.runWebGLProgram(c,[{dataId:e,shape:a,dtype:s}],s),f=this.read(m.dataId);return this.disposeIntermediateTensorInfo(m),f}if(n!=null)return this.convertAndCacheOnCPU(e);if(!se().getBool("WEBGL_DOWNLOAD_FLOAT_ENABLED")&&se().getNumber("WEBGL_VERSION")===2)throw new Error("tensor.data() with WEBGL_DOWNLOAD_FLOAT_ENABLED=false and WEBGL_VERSION=2 not yet supported.");let l=null,u;if(s!=="complex64"&&se().get("WEBGL_BUFFER_SUPPORTED")){u=this.decode(e);let c=this.texData.get(u.dataId);l=this.gpgpu.createBufferFromTexture(c.texture,...ip(a))}this.pendingRead.set(e,[]),s!=="complex64"&&await this.gpgpu.createAndWaitForFence();let d;if(s==="complex64"){let c=await Promise.all([this.read(i.real.dataId),this.read(i.imag.dataId)]),m=c[0],f=c[1];d=M.mergeRealAndImagArrays(m,f)}else if(l==null)d=this.getValuesFromTexture(e);else{let c=k.sizeFromShape(a);d=this.gpgpu.downloadFloat32MatrixFromBuffer(l,c)}u!=null&&this.disposeIntermediateTensorInfo(u);let h=this.convertAndCacheOnCPU(e,d),p=this.pendingRead.get(e);return this.pendingRead.delete(e),p.forEach(c=>c(h)),this.pendingDisposal.has(e)&&(this.pendingDisposal.delete(e),this.disposeData(e)&&Ps().removeDataId(e,this),this.pendingDel
`;function Afe(e){let{inputs:t,backend:n,attrs:a}=e,{x:r}=t,{alpha:s}=a,i=n.makeTensorInfo([],"float32",k.createScalarValue(s,"float32")),o=se().getBool("WEBGL_PACK_BINARY_OPERATIONS")?new pp(kE,r.shape,i.shape):new ku(wE,r.shape,i.shape),l=n.runWebGLProgram(o,[r,i],r.dtype);return n.disposeIntermediateTensorInfo(i),l}var xfe={kernelName:cl,backendName:"webgl",kernelFunc:Afe},IE="return (a < 0.) ? b * a : a;",SE=`
return(log(1.0+x)-log(1.0-x))/2.0;`,b0e=ot({opSnippet:x0e}),v0e={kernelName:Td,backendName:"webgl",kernelFunc:b0e},cp=class{constructor(e,t,n,a=!1,r=!1){if(this.variableNames=["x"],t==="avg"&&n)throw new Error("Cannot compute positions for average pool.");let s=e.filterWidth,i=e.strideHeight,o=e.strideWidth,l=e.dilationHeight,u=e.dilationWidth,d=e.effectiveFilterHeight,h=e.effectiveFilterWidth,p=e.padInfo.top,c=e.padInfo.left;this.outputShape=e.outShape;let m=t==="avg",f=`((batch*${e.inHeight}+xR)*${e.inWidth}+xC)*${e.inChannels}+d`,g=`(xR*${e.inWidth}+xC)*${e.inChannels}+d`,y="0.0";if(m||(y="-1.0 / 1e-20"),n){let I=">=";this.userCode=`
constivec2strides=ivec2(${i},${o});
constivec2pads=ivec2(${p},${c});
voidmain(){
ivec4coords=getOutputCoords();
intbatch=coords[0];
intd=coords[3];
ivec2xRCCorner=coords.yz*strides-pads;
intxRCorner=xRCCorner.x;
intxCCorner=xRCCorner.y;
// max/min x(?, ?, d) to get y(yR, yC, d).
// ? = to be determined
floatminMaxValue=0.0;
floatminMaxValueFound=0.0;
intminMaxPosition=0;
floatavgValue=0.0;
for(intwR=0;wR<${d};
wR+=${l}){
intxR=xRCorner+wR;
if(xR<0||xR>=${e.inHeight}){
continue;
}
for(intwC=0;wC<${h};
wC+=${u}){
intxC=xCCorner+wC;
if(xC<0||xC>=${e.inWidth}){
continue;
}
floatvalue=getX(batch,xR,xC,d);
// If a min / max value has already been found, use it. If not,
`}},ub=class{constructor(e,t,n,a=!1,r=!1){if(this.variableNames=["x"],t==="avg"&&n)throw new Error("Cannot compute positions for average pool.");let s=e.filterWidth,i=e.strideDepth,o=e.strideHeight,l=e.strideWidth,u=e.dilationDepth,d=e.dilationHeight,h=e.dilationWidth,p=e.effectiveFilterDepth,c=e.effectiveFilterHeight,m=e.effectiveFilterWidth,f=e.padInfo.front,g=e.padInfo.top,y=e.padInfo.left;this.outputShape=e.outShape;let A=t==="avg",x="0.0";if(A||(x="-1.0 / 1e-20"),n){let C=">=";this.userCode=`
`}},_0e=({inputs:e,backend:t,attrs:n})=>{let{x:a,mean:r,variance:s,offset:i,scale:o}=e;k.assert(r.shape.length===s.shape.length,()=>"Batch normalization gradient requires mean and variance to have equal ranks."),k.assert(i==null||r.shape.length===i.shape.length,()=>"Batch normalization gradient requires mean and offset to have equal ranks."),k.assert(o==null||r.shape.length===o.shape.length,()=>"Batch normalization gradient requires mean and scale to have equal ranks.");let{varianceEpsilon:l}=n;l==null&&(l=.001);let u=[a,r,s],d=null;i!=null&&(d=i.shape,u.push(i));let h=null;o!=null&&(h=o.shape,u.push(o));let p=se().getBool("WEBGL_PACK_NORMALIZATION")?new D0e(a.shape,r.shape,s.shape,d,h,l):new O0e(a.shape,r.shape,s.shape,d,h,l);return t.runWebGLProgram(p,u,u[0].dtype)},z0e={kernelName:dl,backendName:"webgl",kernelFunc:_0e},P0e=class{constructor(e){this.variableNames=["source"],this.outputShape=e,this.rank=e.length;let t=kt(this.rank),n=`uniformintstart[${this.rank}];`,a=L0e(this.rank),r,s=e.map((i,o)=>`sourceLoc.${db[o]}=start[${o}]+coords.${db[o]};`);r=`
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