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Relative addressing (HLSL PS reference)

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The [ ] syntax can be used only in register types that can be relatively addressed in certain shader models. The supported forms of [ ] syntax are listed as follows:

Where:

  • "R" denotes any register type that can be relatively addressed.
  • "A" denotes any register that can be used as an index to relatively address other registers.
  • n0 - ni, m0 - mj, and k are integers >= 0.
[ ] syntax Effective index Examples
R[ A + m0 + ... + mj ] A + m0 + ... + mj c[ a0.x + 3 + 7 ]
R[ k ] ( = Rk ) k c[ 10 ] ( = c10 )
R[ A ] A c[ a0.y ]
Rk[ n0 + ... + ni + A + m0 + ... + mj ] A + k + n0 + ... + ni + m0 + ... + mj c8[ 3 + 2 + a0.w + 5 + 6 + 1 ]
R[ n0 + ... + ni + A + m0 + ... + mj ] A + n0 + ... + ni + m0 + ... + mj c[ 2 + 1 + aL + 3 + 4 + 5 ]
Rk[ A ] A + k c12[ aL ], c0[ a0.z ]
Rk[ A + m0 + ... + mj ] A + k + m0 + ... + mj v1[ aL + 4 + 8 ]
R[ n0 + ... + ni + A ] A + n0 + ... + ni o[ 3 + 1 + aL ]
Rk[ n0 + ... + ni + A ] A + k + n0 + ... + ni o1[ 2 + 1 + 3 + aL ]

 

The registers are available in the following versions:

Register type Pixel Shader Versions
loop counter: aL on input registers ps_3_0 and higher

 

Registers