[v2,0/3] target/riscv: Remove redundant insn length check for zama16b

Message

LIU Zhiwei Aug. 2, 2024, 3:16 a.m. UTC

In this patch set, we remove the redundant insn length check for zama16b as the
specification clarified that zama16b applies to compressed encodings[1].

Richard points out we should obey the MXLEN requirement for F/D/Q loads or stores,
so we add this constraint for trans_fld/fsd.

I notice that we have a too strict aligment implementation for fld/fsd when xlen < 64.
It will hide some problems. So relex it from MO_ATOM_IFALIGN to MO_ATOM_NONE.

[1]: https://github.com/riscv/riscv-isa-manual/pull/1557

v2<-v1:
  1. Add mxlen check for fld when applies zama16b.
  2. Relax fld/fsd alignment for MO_ATOM_IFALIGN to MO_ATOM_NONE.

LIU Zhiwei (3):
  target/riscv: Remove redundant insn length check for zama16b
  target/riscv: Add MXLEN check for F/D/Q applies to zama16b
  target/riscv: Relax fld alignment requirement

 target/riscv/insn_trans/trans_rvd.c.inc | 25 +++++++++++++++++++++----
 target/riscv/insn_trans/trans_rvf.c.inc |  4 ++--
 target/riscv/insn_trans/trans_rvi.c.inc |  4 ++--
 3 files changed, 25 insertions(+), 8 deletions(-)