GPGPU Programming for Games and Science

238 GPGPU Programming for Games and Science

struct MyMatrix { float4x4 A; } ;

StructuredBuffer<MyMatrix> input ; // 1 e l em en t

RWTexture1D<float> output ; // 16 elements

[numthreads(1,1,1)]

void CSMai n ( i nt3 t : S V

DispatchThreadID)

{

for ( int j=0,k=0; j< 4; ++j )

{

for ( int i=0; i< 4 ; ++ i , ++k )

{

output [k] = input [0].A[ j ][ i ];

}

}

}

LISTING 5.4: A compute shader program that fetches a matrix from a

structured buffer with a struct that has a single member

float4x4.

The output from

FXC using /Zpr is shown in Listing 5.5. The ld structured indexable

instruction was manually split across lines to fit in the width of the page.

//

// Generated by Microsoft ...