diff options
Diffstat (limited to 'Master/texmf-dist/asymptote/shaders/partialsum.glsl')
-rwxr-xr-x | Master/texmf-dist/asymptote/shaders/partialsum.glsl | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Master/texmf-dist/asymptote/shaders/partialsum.glsl b/Master/texmf-dist/asymptote/shaders/partialsum.glsl new file mode 100755 index 00000000000..d00195bb3ae --- /dev/null +++ b/Master/texmf-dist/asymptote/shaders/partialsum.glsl @@ -0,0 +1,37 @@ +layout(local_size_x=PROCESSORS) in; + +uniform uint elements; + +layout(binding=0, std430) buffer sumBuffer +{ + uint sum[]; +}; + +shared uint sharedData[PROCESSORS]; + +void main(void) +{ + uint id=gl_LocalInvocationID.x; + sharedData[id]=sum[id+1u]; + + barrier(); + + uint index=id << 1u; + sharedData[index+1u] += sharedData[index]; + barrier(); + for(uint step=1u; step < STEPSM1; step++) { + uint mask=(1u << step)-1u; + uint index=((id >> step) << (step+1u))+mask; + uint windex=index+(id&mask)+1u; + sharedData[windex] += sharedData[index]; + barrier(); + } + uint mask=(1u << STEPSM1)-1u; + index=((id >> STEPSM1) << (STEPSM1+1u))+mask; + uint windex=index+(id&mask)+1u; + if(windex < PROCESSORS) + sharedData[windex] += sharedData[index]; + barrier(); + + sum[id+1u]=sharedData[id]; +} |