[v3,00/21] target/riscv: Use tcg_constant_*

Message

Richard Henderson Aug. 19, 2021, 9:04 a.m. UTC

Replace use of tcg_const_*, which makes a copy into a temp which must
be freed, with direct use of the constant.  Reorg handling of $zero,
with different accessors for source and destination.  Reorg handling
of csrs, passing the actual write_mask instead of a regno.  Use more
helpers for RVH expansion.

Patches lacking review:
  02-target-riscv-Clean-up-division-helpers.patch
  10-target-riscv-Add-DisasExtend-to-gen_unary.patch
  12-target-riscv-Add-gen_greviw.patch
  17-target-riscv-Use-gen_shift_imm_fn-for-slli_uw.patch
  21-target-riscv-Use-get-dest-_gpr-for-RVV.patch

Though I guess patch 12 could be dropped, given what I learned today
about the Zbb 1.0.0 public review document.

Changes for v3:
  * Fix an introduced remainder bug (bin meng),
    and remove one extra movcond from rem/remu.
  * Do not zero DisasContext on allocation (bin meng).

Changes for v2:
  * Retain the requirement to call gen_set_gpr.
  * Add DisasExtend as an argument to get_gpr, and ctx->w as a member
    of DisasContext.  This should help in implementing UXL, where we
    should be able to set ctx->w for all insns, but there is certainly
    more required for that.

r~

Richard Henderson (21):
  target/riscv: Use tcg_constant_*
  target/riscv: Clean up division helpers
  target/riscv: Add DisasContext to gen_get_gpr, gen_set_gpr
  target/riscv: Introduce DisasExtend and new helpers
  target/riscv: Add DisasExtend to gen_arith*
  target/riscv: Remove gen_arith_div*
  target/riscv: Use gen_arith for mulh and mulhu
  target/riscv: Move gen_* helpers for RVM
  target/riscv: Move gen_* helpers for RVB
  target/riscv: Add DisasExtend to gen_unary
  target/riscv: Use DisasExtend in shift operations
  target/riscv: Add gen_greviw
  target/riscv: Use get_gpr in branches
  target/riscv: Use {get,dest}_gpr for integer load/store
  target/riscv: Reorg csr instructions
  target/riscv: Use {get,dest}_gpr for RVA
  target/riscv: Use gen_shift_imm_fn for slli_uw
  target/riscv: Use {get,dest}_gpr for RVF
  target/riscv: Use {get,dest}_gpr for RVD
  target/riscv: Tidy trans_rvh.c.inc
  target/riscv: Use {get,dest}_gpr for RVV

 target/riscv/helper.h                   |   6 +-
 target/riscv/insn32.decode              |   1 +
 target/riscv/op_helper.c                |  18 +-
 target/riscv/translate.c                | 701 ++++++------------------
 target/riscv/insn_trans/trans_rva.c.inc |  51 +-
 target/riscv/insn_trans/trans_rvb.c.inc | 382 ++++++++++---
 target/riscv/insn_trans/trans_rvd.c.inc | 127 +++--
 target/riscv/insn_trans/trans_rvf.c.inc | 149 +++--
 target/riscv/insn_trans/trans_rvh.c.inc | 266 ++-------
 target/riscv/insn_trans/trans_rvi.c.inc | 360 ++++++------
 target/riscv/insn_trans/trans_rvm.c.inc | 179 ++++--
 target/riscv/insn_trans/trans_rvv.c.inc | 151 ++---
 12 files changed, 1062 insertions(+), 1329 deletions(-)