Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-hex-20210502' into staging

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-hex-20210502' into staging

Minor cleanups.
Finish the rest of the hexagon integer instructions.

# gpg: Signature made Sun 02 May 2021 15:38:17 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-hex-20210502: (31 commits)
  Hexagon (target/hexagon) CABAC decode bin
  Hexagon (target/hexagon) load into shifted register instructions
  Hexagon (target/hexagon) load and unpack bytes instructions
  Hexagon (target/hexagon) bit reverse (brev) addressing
  Hexagon (target/hexagon) circular addressing
  Hexagon (target/hexagon) add A4_addp_c/A4_subp_c
  Hexagon (target/hexagon) add A6_vminub_RdP
  Hexagon (target/hexagon) add A5_ACS (vacsh)
  Hexagon (target/hexagon) add F2_sfinvsqrta
  Hexagon (target/hexagon) add F2_sfrecipa instruction
  Hexagon (target/hexagon) compile all debug code
  Hexagon (target/hexagon) move QEMU_GENERATE to only be on during macros.h
  Hexagon (target/hexagon) cleanup reg_field_info definition
  Hexagon (target/hexagon) cleanup ternary operators in semantics
  Hexagon (target/hexagon) use softfloat for float-to-int conversions
  Hexagon (target/hexagon) replace float32_mul_pow2 with float32_scalbn
  Hexagon (target/hexagon) use softfloat default NaN and tininess
  Hexagon (target/hexagon) change type of softfloat_roundingmodes
  Hexagon (target/hexagon) remove unused carry_from_add64 function
  Hexagon (target/hexagon) change variables from int to bool when appropriate
  ...

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