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2020-09-01target/microblaze: Add flags markup to some helpersRichard Henderson1-4/+4
The mmu_read, mmu_write, get, and put helpers do not touch the general registers, or any of the other variables managed by tcg. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Remove cpu_R[0]Richard Henderson1-1/+7
Do not initialize cpu_R[0], as this should be totally unused. The cpu_for_read and cpu_for_write functions use a local temp. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Remove last of old decoderRichard Henderson2-131/+1
All instructions have been convered. Issue sigill if decodetree does not match. Remove argument decode from DisasContext. Remove microblaze-decode.h. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_stream to decodetreeRichard Henderson2-12/+52
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_msr to decodetreeRichard Henderson2-130/+135
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert msrclr, msrset to decodetreeRichard Henderson2-37/+54
Split this out of dec_msr. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Tidy do_rti, do_rtb, do_rteRichard Henderson1-44/+29
Since cpu_msr is no longer a 64-bit quantity, we can simplify the arithmetic in these functions. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_rts to decodetreeRichard Henderson2-28/+28
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_bcc to decodetreeRichard Henderson2-47/+88
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_br to decodetreeRichard Henderson2-38/+63
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Reorganize branchingRichard Henderson2-118/+80
Remove the btaken variable, and simplify things by always computing the full branch destination into btarget. This avoids all need for sync_jmpstate(). Retain the direct branch behaviour by remembering the jump destination in jmp_dest, discarding btarget. In the normal case, where the branch delay slot cannot trap (e.g. arithmetic), tcg will remove the computation into btarget, leaving us with just the tcg direct branching at the end. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert mbar to decodetreeRichard Henderson2-38/+49
Split this out of the normal branch instructions, as it requires special handling. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert brk and brki to decodetreeRichard Henderson5-53/+79
Split these out of the normal branch instructions, as they require special handling. Perform the entire operation inline, instead of raising EXCP_BREAK to do the work in mb_cpu_do_interrupt. This fixes a bug in that brki rd, imm, for imm != 0x18 is not supposed to set MSR_BIP. This fixes a bug in that imm == 0 is the reset vector and 0x18 is the debug vector, and neither should raise a tcg exception in system mode. Introduce EXCP_SYSCALL for microblaze-linux-user. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Tidy mb_cpu_dump_stateRichard Henderson1-25/+40
Using lookup_symbol is quite slow; remove that. Decode the various bits of iflags; only show imm, btaken, btarget when they are relevant to iflags. Improve formatting. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Replace delayed_branch with tb_flags_to_setRichard Henderson1-12/+5
The multi-stage counter can be replaced by clearing D_FLAG, the or'ing in tb_flags_to_set. The jump then happens when D_FLAG is finally cleared. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Replace clear_imm with tb_flags_to_setRichard Henderson1-6/+9
This more general update variable will be able to handle delay slots as well. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Use cc->do_unaligned_accessRichard Henderson6-69/+64
This fixes the problem in which unaligned stores succeeded, but then we raised the exception after modifying memory. Store the ESS for the unaligned data access in the iflags for the insn, so that it can be found during unwind. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01tcg: Add tcg_get_insn_start_paramRichard Henderson1-0/+15
MicroBlaze will shortly need to update a parameter in place. Add an interface to read to match that for write. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Store "current" iflags in insn_startRichard Henderson2-11/+15
This data is available during exception unwinding, thus we can restore it from there directly, rather than saving it during the TB. Thus we may remove the t_sync_flags() calls in the load/store operations. Note that these calls were missing from the other places where runtime exceptions may be raised, such as idiv and the floating point operations. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Fix no-op mb_cpu_transaction_failedRichard Henderson1-12/+13
Do not call cpu_restore_state when no exception will be delivered. This can lead to inconsistent cpu state. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reported-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Move bimm to BIMM_FLAGRichard Henderson3-10/+8
It makes sense to keep BIMM with D_FLAG, as they can be written back to iflags at the same time. BIMM_FLAG does not need to be added to IFLAGS_TB_MASK because it does not affect the next TB, only the exception path out of the current TB. Renumber IMM_FLAG, as the value 4 holds no particular significance; pack these two flags at the bottom of the bitfield. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Assert no overlap in flags making up tb_flagsRichard Henderson1-2/+7
Create MSR_TB_MASK. Use it in cpu_get_tb_cpu_state, and check that IFLAGS_TB_MASK does not overlap. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_load and dec_store to decodetreeRichard Henderson2-299/+456
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Fix cpu unwind for stackprotRichard Henderson2-2/+6
Restore the correct PC when an exception must be raised. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Cache mem_index in DisasContextRichard Henderson1-4/+5
Ideally, nothing outside the top-level of translation even has access to env. Cache the value in init_disas_context. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Replace MSR_EE_FLAG with MSR_EERichard Henderson2-3/+5
There's no reason to define MSR_EE_FLAG; we can just use the original MSR_EE define. Document the other flags copied into tb_flags with iflag to reserve those bits. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Mark fpu helpers TCG_CALL_NO_WGRichard Henderson1-14/+14
Now that FSR is no longer a tcg global temp, we can say that the fpu helpers do not write to tcg temps. All temps are read implicitly by the fpu exception path. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Fix cpu unwind for fpu exceptionsRichard Henderson1-17/+20
Restore the correct PC when an exception must be raised. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_fpu to decodetreeRichard Henderson2-111/+60
The current dec_check_fpuv2 test, raising an FPU exception for an unimplemented instruction, appears to be contradictory to the manual. Drop that and merely check use_fpu == 2. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_imm to decodetreeRichard Henderson2-9/+11
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_barrel to decodetreeRichard Henderson2-59/+86
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_bit to decodetreeRichard Henderson2-73/+95
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Unwind properly when raising divide-by-zeroRichard Henderson2-13/+14
Restore the correct pc when raising divide-by-zero. Also, the MSR[DZO] bit is sticky -- it is not cleared with a successful divide. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_div to decodetreeRichard Henderson2-22/+16
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_mul to decodetreeRichard Henderson2-46/+37
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_and, dec_or, dec_xor to decodetreeRichard Henderson2-30/+28
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_pattern to decodetreeRichard Henderson2-49/+22
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Implement cmp and cmpu inlineRichard Henderson3-24/+22
These are simple enough operations; we do not need to call an out-of-line helper. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_sub to decodetreeRichard Henderson4-75/+65
Use tcg_gen_add2_i32 for computing carry. This removes the last use of helper_carry, so remove that. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert dec_add to decodetreeRichard Henderson2-41/+176
Adds infrastrucure for translation of instructions, which could not be added before their first use. Cache a temporary which represents r0 as the immediate 0 value, or a sink. Move the special case of opcode_0_illegal from old_decode() into decodetree as well, lest this get interpreted as add. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Add decodetree infrastructureRichard Henderson3-2/+30
The new interface is a stub that recognizes no instructions. It falls back to the old decoder for all instructions. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Ensure imm constant is always availableRichard Henderson2-46/+67
Include the env->imm value in the TB values when IMM_FLAG is set. This means that we can always reconstruct the complete 32-bit imm. Discard env_imm when its contents can no longer be accessed. Fix user-mode checks for BRK/BRKI, which depend on IMM. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Remove LOG_DISRichard Henderson1-77/+1
Also remove the related defines, DISAS_MB and DEBUG_DISAS. Rely on print_insn_microblaze. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Remove empty D macrosRichard Henderson3-11/+4
This is never used in op_helper.c and translate.c. There are two trivial uses in helper.c which can be improved by always logging MMU_EXCP to CPU_LOG_INT. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Remove DISAS_GNURichard Henderson1-1/+0
This is never used. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Remove SIM_COMPATRichard Henderson1-4/+1
Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert to translator_loopRichard Henderson1-137/+146
Finish the conversion to the generic translator_loop. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Convert to DisasContextBaseRichard Henderson1-51/+51
Part one of conversion to the generic translator_loop is to use the DisasContextBase and the members therein. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Check singlestep_enabled in gen_goto_tbRichard Henderson1-1/+6
Do not use goto_tb if we're single-stepping. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2020-09-01target/microblaze: Use DISAS_NORETURNRichard Henderson1-10/+7
Both exceptions and gen_goto_tb do not return. Use the official DISAS_NORETURN enumerator for this case. This eliminates all use of DISAS_TB_JUMP. Tested-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>