The new_pred_value array in the CPUHexagonState is only used for
bookkeeping within the translation of a packet. With recent changes
that eliminate the need to free TCGv variables, these make more sense
to be transient and kept in DisasContext.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-19-tsimpson@quicinc.com>
The new_value array in the CPUHexagonState is only used for bookkeeping
within the translation of a packet. With recent changes that eliminate
the need to free TCGv variables, these make more sense to be transient
and kept in DisasContext.
Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-18-tsimpson@quicinc.com>
Precursor to moving new_value from the global state to DisasContext
USR will need to stay in the global state because some helpers will
set it's value
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-17-tsimpson@quicinc.com>
The following have overrides
S2_insert
S2_insert_rp
S2_asr_r_svw_trun
A2_swiz
These instructions have semantics that write to the destination
before all the operand reads have been completed. Therefore,
the idef-parser versions were disabled with the short-circuit patch.
Test cases added to tests/tcg/hexagon/read_write_overlap.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-16-tsimpson@quicinc.com>
The generated helpers for HVX use pass-by-reference, so they can't
short-circuit when the reads/writes overlap. The instructions with
overrides are OK because they use tcg_gen_gvec_*.
We add a flag has_hvx_helper to DisasContext and extend gen_analyze_funcs
to set the flag when the instruction is an HVX instruction with a
generated helper.
We add an override for V6_vcombine so that it can be short-circuited
along with a test case in tests/tcg/hexagon/hvx_misc.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-15-tsimpson@quicinc.com>
In certain cases, we can avoid the overhead of writing to future_VRegs
and write directly to VRegs. We consider HVX reads/writes when computing
ctx->need_commit. Then, we can early-exit from gen_commit_hvx.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-14-tsimpson@quicinc.com>
In certain cases, we can avoid the overhead of writing to hex_new_pred_value
and write directly to hex_pred. We consider predicate reads/writes when
computing ctx->need_commit. The get_result_pred() function uses this
field to decide between hex_new_pred_value and hex_pred. Then, we can
early-exit from gen_pred_writes.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-13-tsimpson@quicinc.com>
In certain cases, we can avoid the overhead of writing to hex_new_value
and write directly to hex_gpr. We add need_commit field to DisasContext
indicating if the end-of-packet commit is needed. If it is not needed,
get_result_gpr() and get_result_gpr_pair() can return hex_gpr.
We pass the ctx->need_commit to helpers when needed.
Finally, we can early-exit from gen_reg_writes during packet commit.
There are a few instructions whose semantics write to the result before
reading all the inputs. Therefore, the idef-parser generated code is
incompatible with short-circuit. We tell idef-parser to skip them.
For debugging purposes, we add a cpu property to turn off short-circuit.
When the short-circuit property is false, we skip the analysis and force
the end-of-packet commit.
Here's a simple example of the TCG generated for
0x004000b4: 0x7800c020 { R0 = #0x1 }
BEFORE:
---- 004000b4
movi_i32 new_r0,$0x1
mov_i32 r0,new_r0
AFTER:
---- 004000b4
movi_i32 r0,$0x1
This patch reintroduces a use of check_for_attrib, so we remove the
G_GNUC_UNUSED added earlier in this series.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Brian Cain <bcain@quicinc.com>
Message-Id: <20230427230012.3800327-12-tsimpson@quicinc.com>
Have gen_analyze_funcs mark the registers that are read by the
instruction. We also mark the implicit reads using instruction
attributes.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-11-tsimpson@quicinc.com>
When generating TCG, make sure we have read all the operand registers
before writing to the destination registers.
This is a prerequesite for short-circuiting where the source and dest
operands could be the same.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-10-tsimpson@quicinc.com>
Only endloop instructions will conditionally write to a predicate.
When there is an endloop instruction, we preload the values into
new_pred_value.
The only place pred_written is needed is when HEX_DEBUG is on.
We remove the last use of check_for_attrib. However, new uses will be
introduced later in this series, so we mark it with G_GNUC_UNUSED.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-9-tsimpson@quicinc.com>
These instructions have implicit writes to registers, so we don't
want them to be helpers when idef-parser is off.
The following instructions are overriden
S2_cabacdecbin
SA1_cmpeqi
Remove the log_pred_write function from op_helper.c
Remove references in macros.h
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-8-tsimpson@quicinc.com>
With the overrides added in prior commits, this function is not used
Remove references in macros.h
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-7-tsimpson@quicinc.com>
These instructions have implicit reads from p0, so we don't want
them in helpers when idef-parser is off.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-6-tsimpson@quicinc.com>
These instructions have implicit writes to registers, so we don't
want them to be helpers when idef-parser is off.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-5-tsimpson@quicinc.com>
These instructions have implicit writes to registers, so we don't
want them to be helpers when idef-parser is off.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-4-tsimpson@quicinc.com>
Add DisasContext arg to gen_log_reg_write_pair also
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230427230012.3800327-3-tsimpson@quicinc.com>
The following instructions are added
J2_callrh
J2_junprh
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230427224057.3766963-9-tsimpson@quicinc.com>
The following instructions are added
V6_vasrvuhubrndsat
V6_vasrvuhubsat
V6_vasrvwuhrndsat
V6_vasrvwuhsat
V6_vassign_tmp
V6_vcombine_tmp
V6_vmpyuhvs
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230427224057.3766963-7-tsimpson@quicinc.com>
The following instructions are added
V6_v6mpyvubs10_vxx
V6_v6mpyhubs10_vxx
V6_v6mpyvubs10
V6_v6mpyhubs10
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230427224057.3766963-5-tsimpson@quicinc.com>
The following instructions are added
L2_loadw_aq
L4_loadd_aq
R6_release_at_vi
R6_release_st_vi
S2_storew_rl_at_vi
S4_stored_rl_at_vi
S2_storew_rl_st_vi
S4_stored_rl_st_vi
The release instructions are nop's in qemu. The others behave as
loads/stores.
The encodings for these instructions changed some "don't care" bits
L2_loadw_locked
L4_loadd_locked
S2_storew_locked
S4_stored_locked
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230427224057.3766963-3-tsimpson@quicinc.com>
Add support for the ELF flags
Move target/hexagon/cpu.[ch] to be v73
Change the compiler flag used by "make check-tcg"
The decbin instruction is removed in Hexagon v73, so check the
version before trying to compile the instruction.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230427224057.3766963-2-tsimpson@quicinc.com>
Convert away from the old interface with the implicit
MemOp argument. Importantly, this removes some incorrect
casts generated by idef-parser's gen_load().
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230502135741.1158035-4-richard.henderson@linaro.org>
Most of these are not modelled in QEMU, so save the overhead of
calling a helper.
The only exception is dczeroa. It assigns to hex_dczero_addr, which
is handled during packet commit.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230410202402.2856852-1-tsimpson@quicinc.com>
The slot variable in helpers was only passed to log_reg_write function
where the argument is unused.
- Remove declaration from generated helper functions
- Remove slot argument from log_reg_write
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230407204521.357244-1-tsimpson@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230405164211.30015-3-tsimpson@quicinc.com>
The following instructions are overriden
S2_ct0 Count trailing zeros
S2_ct1 Count trailing ones
S2_ct0p Count trailing zeros (register pair)
S2_ct1p Count trailing ones (register pair)
These instructions are not handled by idef-parser because the
imported semantics uses bit-reverse. However, they are
straightforward to implement in TCG with tcg_gen_ctzi_*
Test cases added to tests/tcg/hexagon/misc.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230405164211.30015-1-tsimpson@quicinc.com>
Reducing the number of arguments reduces the overhead of the helper
call
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230405164211.30015-2-tsimpson@quicinc.com>
Remove the following macros (remnants of the old generator design)
READ_REG
READ_PREG
WRITE_RREG
WRITE_PREG
Modify macros that rely on the above
The following are unused
READ_IREG
fGET_FIELD
fSET_FIELD
fREAD_P3
fREAD_NPC
fWRITE_LC0
fWRITE_LC1
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230405183048.147767-1-tsimpson@quicinc.com>
Signed-off-by: Marco Liebel <quic_mliebel@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Acked-by: Taylor Simpson <tsimpson@quicinc.com>
Tested-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20230320092533.2859433-3-quic_mliebel@quicinc.com>
Replace python 2 format string with f-strings
Signed-off-by: Marco Liebel <quic_mliebel@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Tested-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20230320092533.2859433-2-quic_mliebel@quicinc.com>
When there is a conditional change of flow or an endloop instruction, we
preload HEX_REG_PC with ctx->next_PC at gen_start_packet(). Nonetheless,
we still generate TCG code to do this update again at gen_goto_tb() when
the condition for the COF is not met, thus producing redundant
instructions. This can be seen with the following packet:
0x004002e4: 0x5c20d000 { if (!P0) jump:t PC+0 }
Which generates this TCG code:
---- 004002e4
-> mov_i32 pc,$0x4002e8
and_i32 loc9,p0,$0x1
mov_i32 branch_taken,loc9
add_i32 pkt_cnt,pkt_cnt,$0x2
add_i32 insn_cnt,insn_cnt,$0x2
brcond_i32 branch_taken,$0x0,ne,$L1
goto_tb $0x0
mov_i32 pc,$0x4002e4
exit_tb $0x7fb0c36e5200
set_label $L1
goto_tb $0x1
-> mov_i32 pc,$0x4002e8
exit_tb $0x7fb0c36e5201
set_label $L0
exit_tb $0x7fb0c36e5203
Note that even after optimizations, the redundant PC update is still
present:
---- 004002e4
-> mov_i32 pc,$0x4002e8 sync: 0 dead: 0 1 pref=0xffff
mov_i32 branch_taken,$0x1 sync: 0 dead: 0 1 pref=0xffff
add_i32 pkt_cnt,pkt_cnt,$0x2 sync: 0 dead: 0 1 pref=0xffff
add_i32 insn_cnt,insn_cnt,$0x2 sync: 0 dead: 0 1 2 pref=0xffff
goto_tb $0x1
-> mov_i32 pc,$0x4002e8 sync: 0 dead: 0 1 pref=0xffff
exit_tb $0x7fb0c36e5201
set_label $L0
exit_tb $0x7fb0c36e5203
With this patch, the second redundant update is properly discarded.
Note that we need the additional "move_to_pc" flag instead of just
avoiding the update whenever `dest == ctx->next_PC`, as that could
potentially skip updates from a COF with met condition, whose
ctx->branch_dest just happens to be equal to ctx->next_PC.
Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <fc059153c3f0526d97b7f13450c02b276b0908e1.1679519341.git.quic_mathbern@quicinc.com>
Signed-off-by: Anton Johansson <anjo@rev.ng>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230306175230.7110-7-anjo@rev.ng>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
- split user and softmmu code
- use cleaner headers for tb_flush, target_ulong
- probe for gdb multiarch support at configure
- make syscall handling target independent
- add update guest debug of accel ops
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Merge tag 'pull-gdbstub-070323-3' of https://gitlab.com/stsquad/qemu into staging
gdbstub refactor:
- split user and softmmu code
- use cleaner headers for tb_flush, target_ulong
- probe for gdb multiarch support at configure
- make syscall handling target independent
- add update guest debug of accel ops
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# gpg: Signature made Tue 07 Mar 2023 20:45:23 GMT
# gpg: using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [full]
# Primary key fingerprint: 6685 AE99 E751 67BC AFC8 DF35 FBD0 DB09 5A9E 2A44
* tag 'pull-gdbstub-070323-3' of https://gitlab.com/stsquad/qemu: (30 commits)
gdbstub: move update guest debug to accel ops
gdbstub: Build syscall.c once
stubs: split semihosting_get_target from system only stubs
gdbstub: Adjust gdb_do_syscall to only use uint32_t and uint64_t
gdbstub: Remove gdb_do_syscallv
gdbstub: split out softmmu/user specifics for syscall handling
include: split target_long definition from cpu-defs
testing: probe gdb for supported architectures ahead of time
gdbstub: only compile gdbstub twice for whole build
gdbstub: move syscall handling to new file
gdbstub: move register helpers into standalone include
gdbstub: don't use target_ulong while handling registers
gdbstub: fix address type of gdb_set_cpu_pc
gdbstub: specialise stub_can_reverse
gdbstub: introduce gdb_get_max_cpus
gdbstub: specialise target_memory_rw_debug
gdbstub: specialise handle_query_attached
gdbstub: abstract target specific details from gdb_put_packet_binary
gdbstub: rationalise signal mapping in softmmu
gdbstub: move chunks of user code into own files
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
These inline helpers are all used by target specific code so move them
out of the general header so we don't needlessly pollute the rest of
the API with target specific stuff.
Note we have to include cpu.h in semihosting as it was relying on a
side effect before.
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230302190846.2593720-21-alex.bennee@linaro.org>
Message-Id: <20230303025805.625589-21-richard.henderson@linaro.org>
Hexagon's idef-parser machinery uses some bison features that are not
available at older versions. The most preeminent example (as it can
be used as a sentinel) is "%define parse.error verbose". This was
introduced in version 3.0 of the tool, which is able to compile
qemu-hexagon just fine. However, compilation fails with the previous
minor bison release, v2.7. So let's assert the minimum version at
meson.build to give a more comprehensive error message for those trying
to compile QEMU.
[1]: https://www.gnu.org/software/bison/manual/html_node/_0025define-Summary.html#index-_0025define-parse_002eerror
Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alessandro Di Federico <ale@rev.ng>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <a6763f9f7b89ea310ab86f9a2b311a05254a1acd.1675779233.git.quic_mathbern@quicinc.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
The following improvements are made for predicated HVX instructions
During gen_commit_hvx, unconditionally move the "new" value into
the dest
Don't set slot_cancelled
Remove runtime bookkeeping of which registers were updated
Reduce the cases where gen_log_vreg_write[_pair] is called
It's only needed for special operands VxxV and VyV
Remove gen_log_qreg_write
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-15-tsimpson@quicinc.com>
We only need to track slot for predicated stores and predicated HVX
instructions.
Add arguments to the probe helper functions to indicate if the slot
is predicated.
Here is a simple example of the differences in the TCG code generated:
IN:
0x00400094: 0xf900c102 { if (P0) R2 = and(R0,R1) }
BEFORE
---- 00400094
mov_i32 slot_cancelled,$0x0
mov_i32 new_r2,r2
and_i32 tmp0,p0,$0x1
brcond_i32 tmp0,$0x0,eq,$L1
and_i32 tmp0,r0,r1
mov_i32 new_r2,tmp0
br $L2
set_label $L1
or_i32 slot_cancelled,slot_cancelled,$0x8
set_label $L2
mov_i32 r2,new_r2
AFTER
---- 00400094
mov_i32 new_r2,r2
and_i32 tmp0,p0,$0x1
brcond_i32 tmp0,$0x0,eq,$L1
and_i32 tmp0,r0,r1
mov_i32 new_r2,tmp0
br $L2
set_label $L1
set_label $L2
mov_i32 r2,new_r2
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-14-tsimpson@quicinc.com>
We assign the instruction destination register to hex_new_value[num]
instead of a TCG temp that gets copied back to hex_new_value[num].
We introduce new functions get_result_gpr[_pair] to facilitate getting
the proper destination register.
Since we preload hex_new_value for predicated instructions, we don't
need the check for slot_cancelled. So, we call gen_log_reg_write instead.
We update the helper function generation and gen_tcg.h to maintain the
disable-hexagon-idef-parser configuration.
Here is a simple example of the differences in the TCG code generated:
IN:
0x00400094: 0xf900c102 { if (P0) R2 = and(R0,R1) }
BEFORE
---- 00400094
mov_i32 slot_cancelled,$0x0
mov_i32 new_r2,r2
mov_i32 loc2,$0x0
and_i32 tmp0,p0,$0x1
brcond_i32 tmp0,$0x0,eq,$L1
and_i32 tmp0,r0,r1
mov_i32 loc2,tmp0
br $L2
set_label $L1
or_i32 slot_cancelled,slot_cancelled,$0x8
set_label $L2
and_i32 tmp0,slot_cancelled,$0x8
movcond_i32 new_r2,tmp0,$0x0,loc2,new_r2,eq
mov_i32 r2,new_r2
AFTER
---- 00400094
mov_i32 slot_cancelled,$0x0
mov_i32 new_r2,r2
and_i32 tmp0,p0,$0x1
brcond_i32 tmp0,$0x0,eq,$L1
and_i32 tmp0,r0,r1
mov_i32 new_r2,tmp0
br $L2
set_label $L1
or_i32 slot_cancelled,slot_cancelled,$0x8
set_label $L2
mov_i32 r2,new_r2
We'll remove the unnecessary manipulation of slot_cancelled in a
subsequent patch.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-13-tsimpson@quicinc.com>
The F2_sffms instruction [r0 -= sfmpy(r1, r2)] doesn't properly
handle -0. Previously we would negate the input operand by subtracting
from zero. Instead, we negate by changing the sign bit.
Test case added to tests/tcg/hexagon/fpstuff.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-12-tsimpson@quicinc.com>
Extend the analyze_<tag> functions for HVX vector and predicate writes
Remove calls to ctx_log_vreg_write[_pair] from gen_tcg_funcs.py
During gen_start_packet, reload the predicated HVX registers into
fugure_VRegs and tmp_VRegs
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-8-tsimpson@quicinc.com>
The pkt_has_store_s1 field in CPUHexagonState is only needed in generated
helpers for scalar load instructions. See check_noshuf and mem_load[1248]
in op_helper.c.
We add logic in gen_analyze_funcs.py to set need_pkt_has_store_s1 in
DisasContext when it is needed at runtime.
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-7-tsimpson@quicinc.com>
We create a new generator that creates an analyze_<tag> function for
each instruction. Currently, these functions record the writes to
R, P, and C registers by calling ctx_log_reg_write[_pair] or
ctx_log_pred_write.
During gen_start_packet, we invoke the analyze_<tag> function for
each instruction in the packet, and we mark the implicit register
and predicate writes.
Doing the analysis up front has several advantages
- We remove calls to ctx_log_* from gen_tcg_funcs.py and genptr.c
- After the analysis is performed, we can initialize hex_new_value
for each of the predicated assignments rather than during TCG
generation for the instructions
- This is a stepping stone for future work where the analysis will
include the set of registers that are read. In cases where
the packet doesn't have an overlap between the registers that are
written and registers that are read, we can avoid the intermediate
step of writing to hex_new_value. Note that other checks will also
be needed (e.g., no instructions can raise an exception).
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-6-tsimpson@quicinc.com>
These instructions perform a deallocframe+return (jumpr r31)
Add overrides for
L4_return
SL2_return
L4_return_t
L4_return_f
L4_return_tnew_pt
L4_return_fnew_pt
L4_return_tnew_pnt
L4_return_fnew_pnt
SL2_return_t
SL2_return_f
SL2_return_tnew
SL2_return_fnew
This patch eliminates the last helper that uses write_new_pc, so we
remove it from op_helper.c
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-5-tsimpson@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-4-tsimpson@quicinc.com>
Add overrides for
J2_callr
J2_callrt
J2_callrf
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230307025828.1612809-3-tsimpson@quicinc.com>
Removes code paths used by COF instructions, which are no longer
processed by idef-parser.
Tested-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20230131223133.8592-1-anjo@rev.ng>
Merge mov with andi.
Suggested-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <20230306225724.2105263-1-richard.henderson@linaro.org>
