Unimplemented HLSL ASM Instructions

Some of these may be easy to implement, I just haven't had a good example to base the implementation on & test against.

Operands

• Groupshared memory
• Texture UAVs

Functions & Flow control instructions

• OPCODE_INTERFACE_CALL
• OPCODE_CALL
• OPCODE_CALLC
• OPCODE_RET (this assumes that we don't have a 'callstack' of function calls to return from, and ends the shader currently)

Texture instructions

• OPCODE_EVAL_SNAPPED
• OPCODE_EVAL_SAMPLE_INDEX
• OPCODE_EVAL_CENTROID

UAV instructions

• OPCODE_STORE_UAV_TYPED
• OPCODE_STORE_UAV_RAW
• OPCODE_STORE_UAV_STRUCTURED

Atomic/thread instructions

These can all modify groupshared memory as well, as they can be easily implemented once that is implemented. However it's also tricky as these opcodes are only relevant when multiple threads can be running in parallel which we don't simulate. They should still work, but they won't work as expected (especially when sync isn't implemented)

• OPCODE_SYNC - how to implement this? no threads to sync to.
• OPCODE_ATOMIC_AND
• OPCODE_ATOMIC_OR
• OPCODE_ATOMIC_XOR
• OPCODE_ATOMIC_CMP_STORE
• OPCODE_ATOMIC_IMAX
• OPCODE_ATOMIC_IMIN
• OPCODE_IMM_ATOMIC_AND
• OPCODE_IMM_ATOMIC_OR
• OPCODE_IMM_ATOMIC_XOR
• OPCODE_IMM_ATOMIC_EXCH
• OPCODE_IMM_ATOMIC_CMP_EXCH
• OPCODE_IMM_ATOMIC_IADD
• OPCODE_IMM_ATOMIC_IMAX
• OPCODE_IMM_ATOMIC_IMIN
• OPCODE_IMM_ATOMIC_UMAX
• OPCODE_IMM_ATOMIC_UMIN

Geometry instructions

• OPCODE_CUT
• OPCODE_EMIT
• OPCODE_EMITTHENCUT
• OPCODE_EMIT_STREAM
• OPCODE_CUT_STREAM
• OPCODE_EMITTHENCUT_STREAM
• OPCODE_HS_DECLS
• OPCODE_HS_CONTROL_POINT_PHASE
• OPCODE_HS_FORK_PHASE
• OPCODE_HS_JOIN_PHASE

New D3D11.1+ instructions

These are not documented anywhere on the bytecode side, only hlsl side 😩. Most of them are obvious though.

• OPCODE_ABORT
• OPCODE_DEBUGBREAK - ???
• OPCODE_DDIV - double divide
• OPCODE_DFMA - double fused multiply add
• OPCODE_DRCP - double reciprocal
• OPCODE_MSAD
• OPCODE_DTOI - double to int
• OPCODE_DTOU - double to uint
• OPCODE_ITOD - int to double
• OPCODE_UTOD - uint to double

Feedback functions (for tiled resources)

• OPCODE_GATHER4_FEEDBACK
• OPCODE_GATHER4_C_FEEDBACK
• OPCODE_GATHER4_PO_FEEDBACK
• OPCODE_GATHER4_PO_C_FEEDBACK
• OPCODE_LD_FEEDBACK
• OPCODE_LD_MS_FEEDBACK
• OPCODE_LD_UAV_TYPED_FEEDBACK
• OPCODE_LD_RAW_FEEDBACK
• OPCODE_LD_STRUCTURED_FEEDBACK
• OPCODE_SAMPLE_L_FEEDBACK
• OPCODE_SAMPLE_C_LZ_FEEDBACK
• OPCODE_SAMPLE_CLAMP_FEEDBACK
• OPCODE_SAMPLE_B_CLAMP_FEEDBACK
• OPCODE_SAMPLE_D_CLAMP_FEEDBACK
• OPCODE_SAMPLE_C_CLAMP_FEEDBACK
• OPCODE_CHECK_ACCESS_FULLY_MAPPED