[PATCH v2 0/6] support subsets of Float-Point in Integer Registers extensions

[Weiwei Li <liweiwei@iscas.ac.cn>]

This patchset implements RISC-V Float-Point in Integer Registers extensions(Version 1.0.0-rc), which includes Zfinx, Zdinx, Zhinx and Zhinxmin extension. 

Specification:
https://github.com/riscv/riscv-zfinx/blob/main/zfinx-1.0.0-rc.pdf

The port is available here:
https://github.com/plctlab/plct-qemu/tree/plct-zfinx-upstream-v2

To test this implementation, specify cpu argument with 'Zfinx =true,Zdinx=true,Zhinx=true,Zhinxmin=true' with 'g=false,f=false,d=false,Zfh=false,Zfhmin=false'
This implementation can pass gcc tests, ci result can be found in https://ci.rvperf.org/job/plct-qemu-zfinx-upstream/

v2:
* hardwire mstatus.FS to zero when enable zfinx
* do register-pair check at the begin of translation
* optimize partial implemention as suggested 

liweiwei (6):
  target/riscv: add cfg properties for zfinx, zdinx and zhinx{min}
  target/riscv: hardwire mstatus.FS to zero when enable zfinx
  target/riscv: add support for zfinx
  target/riscv: add support for zdinx
  target/riscv: add support for zhinx/zhinxmin
  target/riscv: expose zfinx, zdinx, zhinx{min} properties

 target/riscv/cpu.c                        |  20 ++
 target/riscv/cpu.h                        |   4 +
 target/riscv/cpu_helper.c                 |   6 +-
 target/riscv/csr.c                        |  24 +-
 target/riscv/fpu_helper.c                 | 178 ++++++------
 target/riscv/helper.h                     |   4 +-
 target/riscv/insn_trans/trans_rvd.c.inc   | 319 ++++++++++++++++-----
 target/riscv/insn_trans/trans_rvf.c.inc   | 314 +++++++++++++-------
 target/riscv/insn_trans/trans_rvzfh.c.inc | 332 +++++++++++++++-------
 target/riscv/internals.h                  |  32 ++-
 target/riscv/translate.c                  | 161 +++++++++++
 11 files changed, 1023 insertions(+), 371 deletions(-)

-- 
2.17.1