Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210629' into staging

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-tcg-20210629' into staging

TranslatorOps conversion for target/avr
TranslatorOps conversion for target/cris
TranslatorOps conversion for target/nios2
Simple vector operations on TCGv_i32
Host signal fixes for *BSD
Improvements to tcg bswap operations

# gpg: Signature made Tue 29 Jun 2021 19:51:03 BST
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth-gitlab/tags/pull-tcg-20210629: (63 commits)
  tcg/riscv: Remove MO_BSWAP handling
  tcg/aarch64: Unset TCG_TARGET_HAS_MEMORY_BSWAP
  tcg/arm: Unset TCG_TARGET_HAS_MEMORY_BSWAP
  target/mips: Fix gen_mxu_s32ldd_s32lddr
  target/sh4: Improve swap.b translation
  target/i386: Improve bswap translation
  target/arm: Improve REVSH
  target/arm: Improve vector REV
  target/arm: Improve REV32
  tcg: Make use of bswap flags in tcg_gen_qemu_st_*
  tcg: Make use of bswap flags in tcg_gen_qemu_ld_*
  tcg: Add flags argument to tcg_gen_bswap16_*, tcg_gen_bswap32_i64
  tcg: Handle new bswap flags during optimize
  tcg/tci: Support bswap flags
  tcg/mips: Support bswap flags in tcg_out_bswap32
  tcg/mips: Support bswap flags in tcg_out_bswap16
  tcg/s390: Support bswap flags
  tcg/ppc: Use power10 byte-reverse instructions
  tcg/ppc: Support bswap flags
  tcg/ppc: Split out tcg_out_bswap64
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>