[Qemu-commits] [qemu/qemu] 17560e: decodetree: Initial support for variable-length ISAs

[Peter Maydell]

  Branch: refs/heads/master
  Home:   https://github.com/qemu/qemu
  Commit: 17560e9349ff1fcce814184b37993f92378cf0c4
      
https://github.com/qemu/qemu/commit/17560e9349ff1fcce814184b37993f92378cf0c4
  Author: Richard Henderson <address@hidden>
  Date:   2019-05-06 (Mon, 06 May 2019)

  Changed paths:
    M scripts/decodetree.py

  Log Message:
  -----------
  decodetree: Initial support for variable-length ISAs

Assuming that the ISA clearly describes how to determine
the length of the instruction, and the ISA has a reasonable
maximum instruction length, the input to the decoder can be
right-justified in an appropriate insn word.

This is not 100% convenient, as out-of-line %fields are
numbered relative to the maximum instruction length, but
this appears to still be usable.

Signed-off-by: Richard Henderson <address@hidden>


  Commit: 70e0711ab18fa48279cd2c8cc570b57f38648598
      
https://github.com/qemu/qemu/commit/70e0711ab18fa48279cd2c8cc570b57f38648598
  Author: Richard Henderson <address@hidden>
  Date:   2019-05-06 (Mon, 06 May 2019)

  Changed paths:
    M scripts/decodetree.py

  Log Message:
  -----------
  decodetree: Expand a decode_load function

Read the instruction, loading no more bytes than necessary.

Signed-off-by: Richard Henderson <address@hidden>


  Commit: 451e4ffdb0003ab5ed0d98bd37b385c076aba183
      
https://github.com/qemu/qemu/commit/451e4ffdb0003ab5ed0d98bd37b385c076aba183
  Author: Richard Henderson <address@hidden>
  Date:   2019-05-06 (Mon, 06 May 2019)

  Changed paths:
    M scripts/decodetree.py
    M target/arm/translate-sve.c
    M target/hppa/translate.c
    M target/riscv/insn_trans/trans_rvc.inc.c
    M target/riscv/translate.c

  Log Message:
  -----------
  decodetree: Add DisasContext argument to !function expanders

This does require adjusting all existing users.

Signed-off-by: Richard Henderson <address@hidden>


  Commit: d6de7fed802f2bf42efdc0d081c67dc2ecf01e3f
      
https://github.com/qemu/qemu/commit/d6de7fed802f2bf42efdc0d081c67dc2ecf01e3f
  Author: Peter Maydell <address@hidden>
  Date:   2019-05-07 (Tue, 07 May 2019)

  Changed paths:
    M scripts/decodetree.py
    M target/arm/translate-sve.c
    M target/hppa/translate.c
    M target/riscv/insn_trans/trans_rvc.inc.c
    M target/riscv/translate.c

  Log Message:
  -----------
  Merge remote-tracking branch 'remotes/rth/tags/pull-dt-20190506' into staging

Add support for variable-length ISAs

# gpg: Signature made Mon 06 May 2019 19:26:21 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "address@hidden"
# gpg: Good signature from "Richard Henderson <address@hidden>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/pull-dt-20190506:
  decodetree: Add DisasContext argument to !function expanders
  decodetree: Expand a decode_load function
  decodetree: Initial support for variable-length ISAs

Signed-off-by: Peter Maydell <address@hidden>


Compare: https://github.com/qemu/qemu/compare/1efede74f6e7...d6de7fed802f