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Author SHA1 Message Date
Richard Henderson 9fff3fcc4c target/arm: Use tcg_constant in SUBR 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-44-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:16 +01:00
Richard Henderson 2ccdf94fe7 target/arm: Use tcg_constant in LD1, ST1 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-43-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:16 +01:00
Richard Henderson 4481bbf25e target/arm: Use tcg_constant in WHILE 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-42-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:16 +01:00
Richard Henderson 053552d367 target/arm: Use tcg_constant in do_clast_scalar 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-41-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 4b308bd5f7 target/arm: Use tcg_constant in {incr, wrap}_last_active 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-40-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson e152b48b07 target/arm: Use tcg_constant in FCPY, CPY 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-39-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson d681f1258b target/arm: Use tcg_constant in SINCDEC, INCDEC 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-38-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson b0c3aece6f target/arm: Use tcg_constant for trans_INDEX_* 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-37-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 0b188ea05a target/arm: Use tcg_constant in trans_CSEL 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-36-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 5b95562c50 target/arm: Use tcg_constant in trans_CPS_v7m 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-35-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 7c5bc402fc target/arm: Use tcg_constant in CLRM, DLS, WLS, LE 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-34-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 84d6f34364 target/arm: Use tcg_constant in LDM, STM 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-33-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 38ca784f7c target/arm: Use tcg_constant for TT, SAT, SMMLA 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-32-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 2f28a5b3ac target/arm: Use tcg_constant for v7m MRS, MSR 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-31-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson 302d3343df target/arm: Use tcg_constant for MOVW, UMAAL, CRC32 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-30-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson dfe36d24aa target/arm: Use tcg_constant for op_s_{rri,rxi}_rot 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-29-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson cca8046259 target/arm: Use tcg_constant for gen_srs 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-28-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson dfbbf5e1f9 target/arm: Use tcg_constant for do_coproc_insn 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-27-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:15 +01:00
Richard Henderson f5fd5f64b4 target/arm: Use tcg_constant for vector shift expanders 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-26-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson 1a8598e038 target/arm: Use tcg_constant for gen_{msr,mrs} 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-25-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson c49a6f0d52 target/arm: Use tcg_constant for disas_iwmmxt_insn 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-24-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson 3dd066142c target/arm: Use tcg_constant for aa32 exceptions 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-23-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson abf6819597 target/arm: Use tcg_constant in balance of translate-a64.c 
Finish conversion of the file to tcg_constant_*.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-22-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson 90e2d33ff9 target/arm: Use tcg_constant in 2misc expanders 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-21-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson d26fc8643e target/arm: Use tcg_constant in simd fp/int conversion 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-20-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson 39228a1787 target/arm: Use tcg_constant in simd shift expanders 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-19-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:38:14 +01:00
Richard Henderson e45b201348 target/arm: Use tcg_constant in disas_fp* 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-18-richard.henderson@linaro.org
[PMM: Restore incorrectly removed free of t_false in disas_fp_csel()]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson 4cb05eb74c target/arm: Use tcg_constant in disas_data_proc_2src 
Existing temp usage treats t1 as both zero and as a
temporary.  Rearrange to only require one temporary,
so remove t1 and rename t2.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-17-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson 728963ea97 target/arm: Use tcg_constant in handle_{rev16,crc32} 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-16-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson a8b05af133 target/arm: Use tcg_constant in disas_cond_select 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-15-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson 858943f0e2 target/arm: Use tcg_constant in shift_reg_imm 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-14-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson 12f1d809e6 target/arm: Use tcg_constant in disas_movw_imm 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-13-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson 2e9917194d target/arm: Use tcg_constant in disas_add_sum_imm* 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-12-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson 182320a7a5 target/arm: Use tcg_constant in disas_ldst_* 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-11-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson d43c8232bd target/arm: Use tcg_constant in disas_ld_lit 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-10-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson c433065c45 target/arm: Use tcg_constant in gen_compare_and_swap_pair 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-9-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:58 +01:00
Richard Henderson 820b357a49 target/arm: Use tcg_constant in disas_exc 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-8-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:57 +01:00
Richard Henderson d7eeaa0956 target/arm: Use tcg_constant in handle_sys 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-7-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:57 +01:00
Richard Henderson 181115d906 target/arm: Use tcg_constant in handle_msr_i 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-6-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:57 +01:00
Richard Henderson bc9eb3a367 target/arm: Use tcg_constant in gen_adc_CC 
Note that tmp was doing double-duty as zero
and then later as a temporary in its own right.
Split the use of 0 to a new variable 'zero'.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-5-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:57 +01:00
Richard Henderson dd935b0697 target/arm: Use tcg_constant in gen_exception* 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-4-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:57 +01:00
Richard Henderson 82d08e901f target/arm: Use tcg_constant in gen_mte_check* 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-3-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:57 +01:00
Richard Henderson 35be15069d target/arm: Use tcg_constant in gen_probe_access 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220426163043.100432-2-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2022-04-28 13:35:57 +01:00
Richard Henderson 0cbc135917 target/i386: Suppress coverity warning on fsave/frstor 
Coverity warns that 14 << data32 may overflow with respect
to the target_ulong to which it is subsequently added.
We know this wasn't true because data32 is in [1,2],
but the suggested fix is perfectly fine.

Fixes: Coverity CID 1487135, 1487256
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Damien Hedde <damien.hedde@greensocs.com>
Message-Id: <20220401184635.327423-1-richard.henderson@linaro.org>
 2022-04-26 19:59:51 -07:00
Richard Henderson 21641ee5a9 target/s390x: Fix the accumulation of ccm in op_icm 
Coverity rightly reports that 0xff << pos can overflow.
This would affect the ICMH instruction.

Fixes: Coverity CID 1487161
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20220401193659.332079-1-richard.henderson@linaro.org>
 2022-04-26 19:58:43 -07:00
Richard Henderson 88d5814e6b Fix nios2-linux-user syscalls. 
Fix nios2-linux-user sigreturn.
 Enable tests for nios2-linux-user.
 Remove special handling of SIGSEGV.
 Check supervisor for eret, bret.
 Split special registers out of env->regs[].
 Clean up interrupt processing.
 Raise unaligned data and destination exceptions.
 Set TLBMISC fields correctly on exceptions.
 Prevent writes to read-only or reserved control fields.
 Use tcg_constant_tl().
 Implement shadow register sets.
 Implement external interrupt controller interface.
 Implement vectored interrupt controller.
 Enable semihosting tests for nios2-softmmu.
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Merge tag 'pull-nios2-20220426' of https://gitlab.com/rth7680/qemu into staging

Fix nios2-linux-user syscalls.
Fix nios2-linux-user sigreturn.
Enable tests for nios2-linux-user.
Remove special handling of SIGSEGV.
Check supervisor for eret, bret.
Split special registers out of env->regs[].
Clean up interrupt processing.
Raise unaligned data and destination exceptions.
Set TLBMISC fields correctly on exceptions.
Prevent writes to read-only or reserved control fields.
Use tcg_constant_tl().
Implement shadow register sets.
Implement external interrupt controller interface.
Implement vectored interrupt controller.
Enable semihosting tests for nios2-softmmu.

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# gpg: Signature made Tue 26 Apr 2022 11:16:04 AM PDT
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate]

* tag 'pull-nios2-20220426' of https://gitlab.com/rth7680/qemu: (68 commits)
  tests/tcg/nios2: Add test-shadow-1
  tests/tcg/nios2: Add semihosting multiarch tests
  hw/nios2: Machine with a Vectored Interrupt Controller
  hw/nios2: Move memory regions into Nios2Machine
  hw/nios2: Introduce Nios2MachineState
  hw/intc: Vectored Interrupt Controller (VIC)
  linux-user/nios2: Handle various SIGILL exceptions
  target/nios2: Advance pc when raising exceptions
  target/nios2: Implement EIC interrupt processing
  target/nios2: Update helper_eret for shadow registers
  target/nios2: Implement rdprs, wrprs
  target/nios2: Introduce shadow register sets
  target/nios2: Implement Misaligned destination exception
  target/nios2: Use tcg_gen_lookup_and_goto_ptr
  target/nios2: Use gen_goto_tb for DISAS_TOO_MANY
  target/nios2: Hoist set of is_jmp into gen_goto_tb
  target/nios2: Create gen_jumpr
  target/nios2: Enable unaligned traps for system mode
  target/nios2: Drop CR_STATUS_EH from tb->flags
  target/nios2: Introduce dest_gpr
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
 2022-04-26 13:12:37 -07:00
Richard Henderson e84f176844 target/nios2: Advance pc when raising exceptions 
The exception return address for nios2 is the instruction
after the one that was executing at the time of the exception.

We have so far implemented this by advancing the pc during the
process of raising the exception.  It is perhaps a little less
confusing to do this advance in the translator (and helpers)
when raising the exception in the first place, so that we may
more closely match kernel sources.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20220421151735.31996-58-richard.henderson@linaro.org>
 2022-04-26 08:17:05 -07:00
Richard Henderson a25c4eff32 target/nios2: Implement EIC interrupt processing 
This is the cpu side of the operation.  Register one irq line,
called EIC.  Split out the rather different processing to a
separate function.

Delay initialization of gpio irqs until realize.  We need to
provide a window after init in which the board can set eic_present.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20220421151735.31996-57-richard.henderson@linaro.org>
 2022-04-26 08:17:05 -07:00
Richard Henderson 6bcc59cafa target/nios2: Update helper_eret for shadow registers 
When CRS = 0, we restore from estatus; otherwise from sstatus.
Update for the new CRS.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-56-richard.henderson@linaro.org>
 2022-04-26 08:17:05 -07:00
Richard Henderson 3a03087019 target/nios2: Implement rdprs, wrprs 
Implement these out of line, so that tcg global temps
(aka the architectural registers) are synced back to
tcg storage as required.  This makes sure that we get
the proper results when status.PRS == status.CRS.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-55-richard.henderson@linaro.org>
 2022-04-26 08:17:05 -07:00