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ROADMAP.md

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0.6

0.5

  • Reduce the API to the minimum to run orcc and the generated code
  • Remove orc-stdint.h.
  • For ORC_ENABLE_UNSTABLE_API, create a private header and keep the symbol there
  • Make the OrcX86OpcodeIdx to not include the accepted type of data (mem, registers, etc)
  • The OrcX86Insn and OrcX86Opcode have redundant fields. The instruction should include the prefix stuff, not the opcode
  • (Improve)[https://gitlab.freedesktop.org/gstreamer/orc/-/issues/55] the accumulator implementation to support not only addition but other (already existed) opcodes

0.4.9999

  • Make all .[ch] files to include only functions that belong to that particular component
  • Have all code formatted accordingly
  • Have a pre-commit hook to avoid new commits with wrong format
  • Avoid using any direct access to a structure from the generated code, use getters/setters instead
  • Avoid using any direct access to a structure from other components, use getters/setters instead
  • Put every tool under the tools folder
  • Have a folder per target
  • Share all program code between mmx, sse and avx
  • Move target code into a target related file, not a program related file
  • Properly set the first shift on x86 loops. A variable with alignment 16 on a 32 byte boundary (AVX) should start the loop at 4 shift, not 0
  • Properly align compiler variables on x86 arch, once a known alignment is know, based on iterations mark the is_aligned, not only for one var
  • Make orc_compiler_append_code and therefore ORC_ASM_CODE keep track of the current instruction, to put the comment in the correct place
  • Have an ORC_TARGET envvar to choose the target at runtime

Past ideas

The following items come from the previous TODO and ROADMAP files which still need to be confirmed

  • Memory management for executable sections of code.
  • Parser
  • APIs to handle the replacement for normal functions (schro)
  • APIs to handle the construction of functions at runtime (pixman)
  • Handle compilation failure to fallback to emulation
  • Automatic testing of compiled code
  • Automatic speed measurement
  • Better MMX and SSE engine latency/throughput measurement
  • SSE write alignment
  • Handle SSE cache information and small n
  • Contant n in NEON
  • Aligned source checks
  • New opcodes for sampling: video scaling, fir filtering, fir filtering with downsampling, upsampling/downsampling
  • New opcodes for composite
  • Float parameters
  • Inline orc calls in the compiler
  • Initialization functions in the compiler
  • Instruction scheduler
  • Improve emulation