[FFmpeg-devel,PATCHv3,00/26] RISC-V CPU extensions

Hello,

This supersedes the previous RISC-V sets.

Patches 01-04 support scalar "extensions", including benchmarks on SiFive U74.
Patches 05-06 provide vector support detection.
Patches 07-26 are initial vector optimisations validated with checkasm.

Detection of the vector length and optimisations dependent on the vector
length (VLEN) are left out for later for the sake of (very relative) brevity.

The following changes since commit 79845ce6cf4d0192ebe99bf57b3f7e9b94726667:

  fate/mxf: add JPEG 2000 test (2022-09-20 11:26:00 +0200)

are available in the Git repository at:

  https://git.remlab.net/git/ffmpeg.git rv-cpu

for you to fetch changes up to df310e72cd9b9756faa50d286de41cfaa0604e32:

  lavc/aacpsdsp: RISC-V V mul_pair_single (2022-09-20 17:32:52 +0300)

----------------------------------------------------------------
Rémi Denis-Courmont (26):
      lavu/cpu: detect RISC-V base extensions
      lavu/riscv: initial common header for assembler macros
      lavc/audiodsp: RISC-V F vector_clipf
      lavc/pixblockdsp: RISC-V I get_pixels
      lavu/cpu: CPU flags for the RISC-V Vector extension
      configure: probe RISC-V Vector extension
      lavu/floatdsp: RISC-V V vector_fmul_scalar
      lavu/floatdsp: RISC-V V vector_dmul_scalar
      lavu/floatdsp: RISC-V V vector_fmul
      lavu/floatdsp: RISC-V V vector_dmul
      lavu/floatdsp: RISC-V V vector_fmac_scalar
      lavu/floatdsp: RISC-V V vector_dmac_scalar
      lavu/floatdsp: RISC-V V vector_fmul_add
      lavu/floatdsp: RISC-V V butterflies_float
      lavu/floatdsp: RISC-V V vector_fmul_reversed
      lavu/floatdsp: RISC-V V vector_fmul_window
      lavu/floatdsp: RISC-V V scalarproduct_float
      lavu/fixeddsp: RISC-V V butterflies_fixed
      lavc/audiodsp: RISC-V V vector_clip_int32
      lavc/audiodsp: RISC-V V vector_clipf
      lavc/audiodsp: RISC-V V scalarproduct_int16
      lavc/fmtconvert: RISC-V V int32_to_float_fmul_scalar
      lavc/fmtconvert: RISC-V V int32_to_float_fmul_array8
      lavc/vorbisdsp: RISC-V V inverse_coupling
      lavc/aacpsdsp: RISC-V V add_squares
      lavc/aacpsdsp: RISC-V V mul_pair_single

 Makefile                            |   2 +-
 configure                           |  15 +++
 ffbuild/arch.mak                    |   2 +
 libavcodec/aacpsdsp.h               |   1 +
 libavcodec/aacpsdsp_template.c      |   2 +
 libavcodec/audiodsp.c               |   2 +
 libavcodec/audiodsp.h               |   1 +
 libavcodec/fmtconvert.c             |   2 +
 libavcodec/fmtconvert.h             |   1 +
 libavcodec/pixblockdsp.c            |   2 +
 libavcodec/pixblockdsp.h            |   2 +
 libavcodec/riscv/Makefile           |  11 ++
 libavcodec/riscv/aacpsdsp_init.c    |  41 ++++++
 libavcodec/riscv/aacpsdsp_rvv.S     |  58 +++++++++
 libavcodec/riscv/audiodsp_init.c    |  49 +++++++
 libavcodec/riscv/audiodsp_rvf.S     |  49 +++++++
 libavcodec/riscv/audiodsp_rvv.S     |  75 +++++++++++
 libavcodec/riscv/fmtconvert_init.c  |  46 +++++++
 libavcodec/riscv/fmtconvert_rvv.S   |  69 ++++++++++
 libavcodec/riscv/pixblockdsp_init.c |  45 +++++++
 libavcodec/riscv/pixblockdsp_rvi.S  |  59 +++++++++
 libavcodec/riscv/vorbisdsp_init.c   |  37 ++++++
 libavcodec/riscv/vorbisdsp_rvv.S    |  45 +++++++
 libavcodec/vorbisdsp.c              |   2 +
 libavcodec/vorbisdsp.h              |   1 +
 libavutil/cpu.c                     |  13 ++
 libavutil/cpu.h                     |   9 ++
 libavutil/cpu_internal.h            |   3 +
 libavutil/fixed_dsp.c               |   4 +-
 libavutil/fixed_dsp.h               |   1 +
 libavutil/float_dsp.c               |   2 +
 libavutil/float_dsp.h               |   1 +
 libavutil/riscv/Makefile            |   5 +
 libavutil/riscv/asm.S               |  77 +++++++++++
 libavutil/riscv/cpu.c               | 110 ++++++++++++++++
 libavutil/riscv/fixed_dsp_init.c    |  38 ++++++
 libavutil/riscv/fixed_dsp_rvv.S     |  41 ++++++
 libavutil/riscv/float_dsp_init.c    |  72 +++++++++++
 libavutil/riscv/float_dsp_rvv.S     | 249 ++++++++++++++++++++++++++++++++++++
 tests/checkasm/checkasm.c           |   8 ++
 40 files changed, 1250 insertions(+), 2 deletions(-)
 create mode 100644 libavcodec/riscv/Makefile
 create mode 100644 libavcodec/riscv/aacpsdsp_init.c
 create mode 100644 libavcodec/riscv/aacpsdsp_rvv.S
 create mode 100644 libavcodec/riscv/audiodsp_init.c
 create mode 100644 libavcodec/riscv/audiodsp_rvf.S
 create mode 100644 libavcodec/riscv/audiodsp_rvv.S
 create mode 100644 libavcodec/riscv/fmtconvert_init.c
 create mode 100644 libavcodec/riscv/fmtconvert_rvv.S
 create mode 100644 libavcodec/riscv/pixblockdsp_init.c
 create mode 100644 libavcodec/riscv/pixblockdsp_rvi.S
 create mode 100644 libavcodec/riscv/vorbisdsp_init.c
 create mode 100644 libavcodec/riscv/vorbisdsp_rvv.S
 create mode 100644 libavutil/riscv/Makefile
 create mode 100644 libavutil/riscv/asm.S
 create mode 100644 libavutil/riscv/cpu.c
 create mode 100644 libavutil/riscv/fixed_dsp_init.c
 create mode 100644 libavutil/riscv/fixed_dsp_rvv.S
 create mode 100644 libavutil/riscv/float_dsp_init.c
 create mode 100644 libavutil/riscv/float_dsp_rvv.S