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2024-03-29tcg/optimize: Fix sign_mask for logical right-shiftRichard Henderson1-1/+1
The 'sign' computation is attempting to locate the sign bit that has been repeated, so that we can test if that bit is known zero. That computation can be zero if there are no known sign repetitions. Cc: qemu-stable@nongnu.org Fixes: 93a967fbb57 ("tcg/optimize: Propagate sign info for shifting") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2248 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-03-12tcg/aarch64: Fix tcg_out_brcond for test comparisonsRichard Henderson1-0/+1
When converting test vs UINT32_MAX to compare vs 0, we need to adjust the condition to match. Fixes: 34aff3c2e06 ("tcg/aarch64: Generate CBNZ for TSTNE of UINT32_MAX") Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-03-12tcg/aarch64: Fix tcg_out_cmp for test comparisonsRichard Henderson1-2/+1
Pass the type to tcg_out_logicali; remove the assert, duplicated at the start of tcg_out_logicali. Fixes: 339adf2f38e ("tcg/aarch64: Support TCG_COND_TST{EQ,NE}") Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-29tcg/optimize: fix uninitialized variablePaolo Bonzini1-1/+2
The variables uext_opc and sext_opc are used without initialization if TCG_TARGET_extract_i{32,64}_valid returns false. The result, depending on the compiler, might be the generation of extract and sextract opcodes with invalid offset and count, or just random data in the TCG opcode stream. Fixes: ceb9ee06b71 ("tcg/optimize: Handle TCG_COND_TST{EQ,NE}", 2024-02-03) Cc: Richard Henderson <pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20240228110641.287205-1-pbonzini@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-29tcg/aarch64: Apple does not align __int128_t in even registersRichard Henderson1-1/+5
From https://developer.apple.com/documentation/xcode/writing-arm64-code-for-apple-platforms When passing an argument with 16-byte alignment in integer registers, Apple platforms allow the argument to start in an odd-numbered xN register. The standard ABI requires it to begin in an even-numbered xN register. Cc: qemu-stable@nongnu.org Fixes: 5427a9a7604 ("tcg: Add TCG_TARGET_CALL_{RET,ARG}_I128") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2169 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <9fc0c2c7-dd57-459e-aecb-528edb74b4a7@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-02-13tcg/arm: Fix goto_tb for large translation blocksRichard Henderson1-2/+2
Correct arithmetic for separating high and low on a large negative number. Cc: qemu-stable@nongnu.org Fixes: 79ffece4447 ("tcg/arm: Implement direct branch for goto_tb") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1714 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
2024-02-05tcg/tci: Support TCG_COND_TST{EQ,NE}Richard Henderson2-1/+15
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-05tcg/s390x: Support TCG_COND_TST{EQ,NE}Richard Henderson2-44/+97
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/s390x: Add TCG_CT_CONST_CMPRichard Henderson3-21/+58
Better constraint for tcg_out_cmp, based on the comparison. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/s390x: Split constraint A into J+URichard Henderson3-23/+23
Signed 33-bit == signed 32-bit + unsigned 32-bit. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/ppc: Support TCG_COND_TST{EQ,NE}Richard Henderson2-9/+115
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/ppc: Add TCG_CT_CONST_CMPRichard Henderson3-10/+44
Better constraint for tcg_out_cmp, based on the comparison. We can't yet remove the fallback to load constants into a scratch because of tcg_out_cmp2, but that path should not be as frequent. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/ppc: Tidy up tcg_target_const_matchRichard Henderson1-11/+16
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/ppc: Use cr0 in tcg_to_bc and tcg_to_iselRichard Henderson1-34/+34
Using cr0 means we could choose to use rc=1 to compute the condition. Adjust the tables and tcg_out_cmp that feeds them. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/ppc: Sink tcg_to_bc usage into tcg_out_bcRichard Henderson1-11/+17
Rename the current tcg_out_bc function to tcg_out_bc_lab, and create a new function that takes an integer displacement + link. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/sparc64: Support TCG_COND_TST{EQ,NE}Richard Henderson2-3/+15
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/sparc64: Pass TCGCond to tcg_out_cmpRichard Henderson1-10/+11
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/sparc64: Hoist read of tcg_cond_to_rcondRichard Henderson1-11/+14
Use a non-zero value here (an illegal encoding) as a better condition than is_unsigned_cond for when MOVR/BPR is usable. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/i386: Use TEST r,r to test 8/16/32 bitsPaolo Bonzini1-0/+17
Just like when testing against the sign bits, TEST r,r can be used when the immediate is 0xff, 0xff00, 0xffff, 0xffffffff. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/i386: Improve TSTNE/TESTEQ vs powers of twoRichard Henderson3-8/+53
Use "test x,x" when the bit is one of the 4 sign bits. Use "bt imm,x" otherwise. Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/i386: Support TCG_COND_TST{EQ,NE}Richard Henderson2-37/+60
Merge tcg_out_testi into tcg_out_cmp and adjust the two uses. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/i386: Move tcg_cond_to_jcc[] into tcg_out_cmpRichard Henderson1-11/+13
Return the x86 condition codes to use after the compare. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/i386: Pass x86 condition codes to tcg_out_cmovRichard Henderson1-8/+8
Hoist the tcg_cond_to_jcc index outside the function. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/arm: Support TCG_COND_TST{EQ,NE}Richard Henderson2-2/+29
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20231028194522.245170-12-richard.henderson@linaro.org> [PMD: Split from bigger patch, part 2/2] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20231108145244.72421-2-philmd@linaro.org>
2024-02-03tcg/arm: Split out tcg_out_cmp()Richard Henderson1-15/+17
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20231028194522.245170-12-richard.henderson@linaro.org> [PMD: Split from bigger patch, part 1/2] Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20231108145244.72421-1-philmd@linaro.org>
2024-02-03tcg/aarch64: Generate CBNZ for TSTNE of UINT32_MAXRichard Henderson1-0/+6
... and the inverse, CBZ for TSTEQ. Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/aarch64: Generate TBZ, TBNZRichard Henderson1-12/+62
Test the sign bit for LT/GE vs 0, and TSTNE/EQ vs a power of 2. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20240119224737.48943-2-philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/aarch64: Massage tcg_out_brcond()Philippe Mathieu-Daudé1-8/+23
In order to ease next commit review, modify tcg_out_brcond() to switch over TCGCond. No logical change intended. Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20240119224737.48943-1-philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/aarch64: Support TCG_COND_TST{EQ,NE}Richard Henderson4-19/+43
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg: Add TCGConst argument to tcg_target_const_matchRichard Henderson11-12/+52
Fill the new argument from any condition within the opcode. Not yet used within any backend. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/optimize: Lower TCG_COND_TST{EQ,NE} if unsupportedRichard Henderson3-9/+55
After having performed other simplifications, lower any remaining test comparisons with AND. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/optimize: Handle TCG_COND_TST{EQ,NE}Richard Henderson1-22/+218
Fold constant comparisons. Canonicalize "tst x,x" to equality vs zero. Canonicalize "tst x,sign" to sign test vs zero. Fold double-word comparisons with zero parts. Fold setcond of "tst x,pow2" to a bit extract. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/optimize: Do swap_commutative2 in do_constant_folding_cond2Richard Henderson1-50/+57
Mirror the new do_constant_folding_cond1 by doing all argument and condition adjustment within one helper. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/optimize: Split out do_constant_folding_cond1Richard Henderson1-30/+27
Handle modifications to the arguments and condition in a single place. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/optimize: Split out arg_is_const_valRichard Henderson1-15/+23
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg: Introduce TCG_TARGET_HAS_tstRichard Henderson10-0/+20
Define as 0 for all tcg backends. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg: Introduce TCG_COND_TST{EQ,NE}Richard Henderson1-1/+3
Add the enumerators, adjust the helpers to match, and dump. Not supported anywhere else just yet. Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-02-03tcg/loongarch64: Set vector registers call clobberedRichard Henderson1-1/+1
Because there are more call clobbered registers than call saved registers, we begin with all registers as call clobbered and then reset those that are saved. This was missed when we introduced the LSX support. Cc: qemu-stable@nongnu.org Fixes: 16288ded944 ("tcg/loongarch64: Lower basic tcg vec ops to LSX") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2136 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Song Gao <gaosong@loongson.cn> Message-Id: <20240201233414.500588-1-richard.henderson@linaro.org>
2024-01-29accel/tcg: Move perf and debuginfo support to tcg/Ilya Leoshkevich4-1/+483
tcg/ should not depend on accel/tcg/, but perf and debuginfo support provided by the latter are being used by tcg/tcg.c. Since that's the only user, move both to tcg/. Suggested-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-ID: <20231212003837.64090-5-iii@linux.ibm.com> Message-Id: <20240125054631.78867-5-philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-23tcg/arm: Fix SIGILL in tcg_out_qemu_st_directJoseph Burt1-0/+3
When tcg_out_qemu_st_{index,direct} were merged, the direct case for MO_64 was omitted, causing qemu_st_i64 to be encoded as 0xffffffff due to underflow when adding h.base and h.index. Fixes: 1df6d611bdc2 ("tcg/arm: Introduce HostAddress") Signed-off-by: Joseph Burt <caseorum@gmail.com> Message-Id: <20240121211439.100829-1-caseorum@gmail.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-23tcg/s390x: Fix encoding of VRIc, VRSa, VRSc insnsRichard Henderson1-3/+3
While the format names the second vector register 'v3', it is still in the second position (bits 12-15) and the argument to RXB must match. Example error: - e7 00 00 10 2a 33 verllf %v16,%v0,16 + e7 00 00 10 2c 33 verllf %v16,%v16,16 Cc: qemu-stable@nongnu.org Reported-by: Michael Tokarev <mjt@tls.msk.ru> Fixes: 22cb37b4172 ("tcg/s390x: Implement vector shift operations") Fixes: 79cada8693d ("tcg/s390x: Implement tcg_out_dup*_vec") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2054 Reviewed-by: Thomas Huth <thuth@redhat.com> Tested-by: Michael Tokarev <mjt@tls.msk.ru> Message-Id: <20240117213646.159697-2-richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-23tcg: Make the cleanup-on-error path uniqueSamuel Tardieu1-3/+3
By calling `error_setg_errno()` before jumping to the cleanup-on-error path at the `fail` label, the cleanup path is clearer. Signed-off-by: Samuel Tardieu <sam@rfc1149.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20231219182212.455952-3-sam@rfc1149.net> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-23tcg: Remove unreachable codeSamuel Tardieu1-3/+1
The `fail_rx`/`fail` block is only entered while `buf_rx` is equal to its initial value `MAP_FAILED`. The `munmap(buf_rx, size);` was never executed. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2030 Signed-off-by: Samuel Tardieu <sam@rfc1149.net> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20231219182212.455952-2-sam@rfc1149.net> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-11tcg/ppc: Use new registers for LQ destinationRichard Henderson3-7/+19
LQ has a constraint that RTp != RA, else SIGILL. Therefore, force the destination of INDEX_op_qemu_*_ld128 to be a new register pair, so that it cannot overlap the input address. This requires new support in process_op_defs and tcg_reg_alloc_op. Cc: qemu-stable@nongnu.org Fixes: 526cd4ec01f ("tcg/ppc: Support 128-bit load/store") Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Message-Id: <20240102013456.131846-1-richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-11tcg/i386: use 8-bit OR or XOR for unsigned 8-bit immediatesPaolo Bonzini1-0/+11
In the case where OR or XOR has an 8-bit immediate between 128 and 255, we can operate on a low-byte register and shorten the output by two or three bytes (two if a prefix byte is needed for REX.B). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20231228120524.70239-1-pbonzini@redhat.com> [rth: Incorporate into switch.] Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2024-01-11tcg/i386: convert add/sub of 128 to sub/add of -128Paolo Bonzini1-15/+34
Extend the existing conditional that generates INC/DEC, to also swap an ADD for a SUB and vice versa when the immediate is 128. This facilitates using OPC_ARITH_EvIb instead of OPC_ARITH_EvIz. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20231228120514.70205-1-pbonzini@redhat.com> [rth: Use a switch on C] Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-12-31meson: remove config_targetosPaolo Bonzini1-1/+1
config_targetos is now empty and can be removed; its use in sourcesets that do not involve target-specific files can be replaced with an empty dictionary. In fact, at this point *all* sourcesets that do not involve target-specific files are just glorified mutable arrays. Enforce that they never test for symbols in "when:" by computing the set of files without "strict: false". Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-12-12tcg: Reduce serial context atomicity earlierRichard Henderson2-12/+25
Reduce atomicity while emitting opcodes, instead of later during code generation. This ensures that any helper called also sees the reduced atomicity requirement. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2034 Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Tested-by: Alex Bennée <alex.bennee@linaro.org> Message-Id: <20231212193542.149117-1-richard.henderson@linaro.org>
2023-11-21tcg/loongarch64: Fix tcg_out_mov() AbortedSong Gao1-0/+3
On LoongArch host, we got an Aborted from tcg_out_mov(). qemu-x86_64 configure with '--enable-debug'. > (gdb) b /home1/gaosong/code/qemu/tcg/loongarch64/tcg-target.c.inc:312 > Breakpoint 1 at 0x2576f0: file /home1/gaosong/code/qemu/tcg/loongarch64/tcg-target.c.inc, line 312. > (gdb) run hello [...] > Thread 1 "qemu-x86_64" hit Breakpoint 1, tcg_out_mov (s=0xaaaae91760 <tcg_init_ctx>, type=TCG_TYPE_V128, ret=TCG_REG_V2, > arg=TCG_REG_V0) at /home1/gaosong/code/qemu/tcg/loongarch64/tcg-target.c.inc:312 > 312 g_assert_not_reached(); > (gdb) bt > #0 tcg_out_mov (s=0xaaaae91760 <tcg_init_ctx>, type=TCG_TYPE_V128, ret=TCG_REG_V2, arg=TCG_REG_V0) > at /home1/gaosong/code/qemu/tcg/loongarch64/tcg-target.c.inc:312 > #1 0x000000aaaad0fee0 in tcg_reg_alloc_mov (s=0xaaaae91760 <tcg_init_ctx>, op=0xaaaaf67c20) at ../tcg/tcg.c:4632 > #2 0x000000aaaad142f4 in tcg_gen_code (s=0xaaaae91760 <tcg_init_ctx>, tb=0xffe8030340 <code_gen_buffer+197328>, > pc_start=4346094) at ../tcg/tcg.c:6135 [...] > (gdb) c > Continuing. > ** > ERROR:/home1/gaosong/code/qemu/tcg/loongarch64/tcg-target.c.inc:312:tcg_out_mov: code should not be reached > Bail out! ERROR:/home1/gaosong/code/qemu/tcg/loongarch64/tcg-target.c.inc:312:tcg_out_mov: code should not be reached > > Thread 1 "qemu-x86_64" received signal SIGABRT, Aborted. > 0x000000fff7b1c390 in raise () from /lib64/libc.so.6 > (gdb) q Fixes: 16288ded94 ("tcg/loongarch64: Lower basic tcg vec ops to LSX") Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Song Gao <gaosong@loongson.cn> Message-Id: <20231120065916.374045-1-gaosong@loongson.cn>
2023-11-06tcg/sparc64: Implement tcg_out_extrl_i64_i32Richard Henderson1-0/+5
Build fix for missing symbol. Cc: qemu-stable@nongnu.org Fixes: dad2f2f5af ("tcg/sparc64: Disable TCG_TARGET_HAS_extr_i64_i32") Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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