[Qemu-devel] [RFC PATCH v2 00/39] rewrite MMX/SSE instruction translation

[Jan Bobek]

This is a v2 of the patch series posted in [1]. Patches 1-9 are just
cleanups; patches 10-39 are something actually interesting. Compared
to v1, I started using preprocessor more extensively to generate
repetitive boilerplate code; opinions/alternatives are welcome and
appreciated.

I tried to eliminate as many errors reported by scripts/checkpatch.pl
as I could, but there are still some left; AFAICT they appear to be
non-applicable false positives caused by preprocessor macros.

There is a known flaw of M* operands documented in patches 25 and 39;
it will be addressed in v3. (It has some design implications which
require larger changes, so that's why I'm not including them right
away, but I already have a good idea of how to address this.)

Cheers,
  -Jan

Changes from v1:
  There is in fact little overlap with v1, apart from the minor
  cleanup patches; I tried a different approach this time.

References:
  1. https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg07041.html

Jan Bobek (36):
  target/i386: reduce scope of variable aflag
  target/i386: use dflag from DisasContext
  target/i386: use prefix from DisasContext
  target/i386: use pc_start from DisasContext
  target/i386: make variable b1 const
  target/i386: make variable is_xmm const
  target/i386: add vector register file alignment constraints
  target/i386: introduce gen_(ld,st)d_env_A0
  target/i386: introduce gen_sse_ng
  target/i386: disable unused function warning temporarily
  target/i386: introduce mnemonic aliases for several gvec operations
  target/i386: introduce function ck_cpuid
  target/i386: introduce instruction operand infrastructure
  target/i386: introduce helpers for decoding modrm fields
  target/i386: introduce modifier for direct-only operand decoding
  target/i386: introduce generic operand alias
  target/i386: introduce generic load-store operand
  target/i386: introduce insn.h
  target/i386: introduce code generators
  target/i386: introduce instruction translator macros
  target/i386: introduce Ib (immediate) operand
  target/i386: introduce M* (memptr) operands
  target/i386: introduce G*, R*, E* (general register) operands
  target/i386: introduce RdMw operand
  target/i386: introduce P*, N*, Q* (MMX) operands
  target/i386: introduce helper-based code generator macros
  target/i386: introduce gvec-based code generator macros
  target/i386: introduce MMX translators
  target/i386: introduce MMX code generators
  target/i386: introduce MMX instructions to insn.h
  target/i386: introduce V*, U*, W* (SSE/AVX) operands
  target/i386: introduce UdqMq operand
  target/i386: introduce SSE translators
  target/i386: introduce SSE code generators
  target/i386: introduce SSE instructions to insn.h
  target/i386: introduce memory-pointer operand read/write workarounds

Richard Henderson (3):
  target/i386: Push rex_r into DisasContext
  target/i386: Push rex_w into DisasContext
  target/i386: Simplify gen_exception arguments

 target/i386/cpu.h       |    6 +-
 target/i386/insn.h      |  381 ++++++++
 target/i386/translate.c | 2032 ++++++++++++++++++++++++++++++++-------
 3 files changed, 2095 insertions(+), 324 deletions(-)
 create mode 100644 target/i386/insn.h

-- 
2.20.1