Merge tag 'pull-hex-20230518-1' of https://github.com/quic/qemu into staging

Hexagon update

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# RC

Merge tag 'pull-hex-20230518-1' of https://github.com/quic/qemu into staging

Hexagon update

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# gpg: Signature made Thu 18 May 2023 12:48:24 PM PDT
# gpg: using RSA key 3635C788CE62B91FD4C59AB47B0244FB12DE4422
# gpg: Good signature from "Taylor Simpson (Rock on) <tsimpson@quicinc.com>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 3635 C788 CE62 B91F D4C5 9AB4 7B02 44FB 12DE 4422

* tag 'pull-hex-20230518-1' of https://github.com/quic/qemu: (44 commits)
Hexagon (linux-user/hexagon): handle breakpoints
Hexagon (gdbstub): add HVX support
Hexagon (gdbstub): fix p3:0 read and write via stub
Hexagon: add core gdbstub xml data for LLDB
gdbstub: add test for untimely stop-reply packets
gdbstub: only send stop-reply packets when allowed to
Remove test_vshuff from hvx_misc tests
Hexagon (decode): look for pkts with multiple insns at the same slot
Hexagon (iclass): update J4_hintjumpr slot constraints
Hexagon: append eflags to unknown cpu model string
Hexagon: list available CPUs with `-cpu help`
Hexagon (target/hexagon/*.py): raise exception on reg parsing error
target/hexagon: fix = vs. == mishap
Hexagon (target/hexagon) Additional instructions handled by idef-parser
Hexagon (target/hexagon) Move items to DisasContext
Hexagon (target/hexagon) Move pkt_has_store_s1 to DisasContext
Hexagon (target/hexagon) Move pred_written to DisasContext
Hexagon (target/hexagon) Move new_pred_value to DisasContext
Hexagon (target/hexagon) Move new_value to DisasContext
Hexagon (target/hexagon) Make special new_value for USR
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

Hexagon (iclass): update J4_hintjumpr slot constraints

The Hexagon PRM says that "The assembler automatically encodes
instructions in the packet in the proper order. In the binary encoding
of a pack

Hexagon (iclass): update J4_hintjumpr slot constraints

The Hexagon PRM says that "The assembler automatically encodes
instructions in the packet in the proper order. In the binary encoding
of a packet, the instructions must be ordered from Slot 3 down to
Slot 0."

Prior to the architecture version v73, the slot constraints from
instruction "hintjr" only allowed it to be executed at slot 2.
With that in mind, consider the packet:

{
hintjr(r0)
nop
nop
if (!p0) memd(r1+#0) = r1:0
}

To satisfy the ordering rule quoted from the PRM, the assembler would,
thus, move one of the nops to the first position, so that it can be
assigned to slot 3 and the subsequent hintjr to slot 2.

However, since v73, hintjr can be executed at either slot 2 or 3. So
there is no need to reorder that packet and the assembler will encode it
as is. When QEMU tries to execute it, however, we end up hitting a
"misaliged store" exception because both the store and the hintjr will
be assigned to store 0, and some functions like `slot_is_predicated()`
expect the decode machinery to assign only one instruction per slot. In
particular, the mentioned function will traverse the packet until it
finds the first instruction at the desired slot which, for slot 0, will
be hintjr. Since hintjr is not predicated, the result is that we try to
execute the store regardless of the predicate. And because the predicate
is false, we had not previously loaded hex_store_addr[0] or
hex_store_width[0]. As a result, the store will decide de width based on
trash memory, causing it to be misaligned.

Update the slot constraints for hintjr so that QEMU can properly handle
such encodings.

Note: to avoid similar-but-not-identical issues in the future, we should
look for multiple instructions at the same slot during decoding time and
throw an invalid packet exception. That will be done in the subsequent
commit.

Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Reviewed-by: Taylor Simpson <tsimpson@quicinc.com>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <0fcd8293642c6324119fbbab44741164bcbd04fb.1673616964.git.quic_mathbern@quicinc.com>

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Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-hex-20210502' into staging

Minor cleanups.
Finish the rest of the hexagon integer instructions.

# gpg: Signature made Sun 02 May 2021 15:3

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-hex-20210502' into staging

Minor cleanups.
Finish the rest of the hexagon integer instructions.

# gpg: Signature made Sun 02 May 2021 15:38:17 BST
# gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg: issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F

* remotes/rth-gitlab/tags/pull-hex-20210502: (31 commits)
Hexagon (target/hexagon) CABAC decode bin
Hexagon (target/hexagon) load into shifted register instructions
Hexagon (target/hexagon) load and unpack bytes instructions
Hexagon (target/hexagon) bit reverse (brev) addressing
Hexagon (target/hexagon) circular addressing
Hexagon (target/hexagon) add A4_addp_c/A4_subp_c
Hexagon (target/hexagon) add A6_vminub_RdP
Hexagon (target/hexagon) add A5_ACS (vacsh)
Hexagon (target/hexagon) add F2_sfinvsqrta
Hexagon (target/hexagon) add F2_sfrecipa instruction
Hexagon (target/hexagon) compile all debug code
Hexagon (target/hexagon) move QEMU_GENERATE to only be on during macros.h
Hexagon (target/hexagon) cleanup reg_field_info definition
Hexagon (target/hexagon) cleanup ternary operators in semantics
Hexagon (target/hexagon) use softfloat for float-to-int conversions
Hexagon (target/hexagon) replace float32_mul_pow2 with float32_scalbn
Hexagon (target/hexagon) use softfloat default NaN and tininess
Hexagon (target/hexagon) change type of softfloat_roundingmodes
Hexagon (target/hexagon) remove unused carry_from_add64 function
Hexagon (target/hexagon) change variables from int to bool when appropriate
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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target/hexagon: remove unnecessary checks in find_iclass_slots

Reported-by: Richard Henderson <<richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <161578

target/hexagon: remove unnecessary checks in find_iclass_slots

Reported-by: Richard Henderson <<richard.henderson@linaro.org>
Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <1615784037-26129-1-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-hex-20210218' into staging

Initial commit for the Qualcomm Hexagon processor.

# gpg: Signature made Thu 18 Feb 2021 16:26:52 GMT
# gpg:

Merge remote-tracking branch 'remotes/rth-gitlab/tags/pull-hex-20210218' into staging

Initial commit for the Qualcomm Hexagon processor.

# gpg: Signature made Thu 18 Feb 2021 16:26:52 GMT
# gpg: using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg: issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [full]
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F

* remotes/rth-gitlab/tags/pull-hex-20210218: (35 commits)
Hexagon build infrastructure
Hexagon (tests/tcg/hexagon) TCG tests - floating point
Hexagon (tests/tcg/hexagon) TCG tests - atomics/load/store/misc
Hexagon (tests/tcg/hexagon) TCG tests - multiarch
Hexagon (linux-user/hexagon) Linux user emulation
Hexagon (target/hexagon) translation
Hexagon (target/hexagon) TCG for floating point instructions
Hexagon (target/hexagon) TCG for instructions with multiple definitions
Hexagon (target/hexagon) TCG generation
Hexagon (target/hexagon) instruction classes
Hexagon (target/hexagon) macros
Hexagon (target/hexagon) opcode data structures
Hexagon (target/hexagon) generater phase 4 - decode tree
Hexagon (target/hexagon) generator phase 3 - C preprocessor for decode tree
Hexagon (target/hexagon) generator phase 2 - generate header files
Hexagon (target/hexagon) generator phase 1 - C preprocessor for semantics
Hexagon (target/hexagon/imported) arch import
Hexagon (target/hexagon/fma_emu.[ch]) utility functions
Hexagon (target/hexagon/conv_emu.[ch]) utility functions
Hexagon (target/hexagon/arch.[ch]) utility functions
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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Hexagon (target/hexagon) instruction classes

Determine legal VLIW slots for each instruction

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@l

Hexagon (target/hexagon) instruction classes

Determine legal VLIW slots for each instruction

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1612763186-18161-26-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...