Fixes a 16 year old bug report, which even came with a patch.
opcodes/
PR 1202
* mcore-dis.c (print_insn_mcore): Correct loopt disassembly.
Use unsigned int for inst.
gas/
PR 1202
* testsuite/gas/mcore/allinsn.d: Correct loopt expected output.
The idea of this change is simple: Populate a data structure, namely
"disasm_option_and_arg_t" from "include/dis-asm.h", to encompass the
disassembly options and their possible arguments.
This will make it easier to manage or extend those options by adapting
entries in a data structure, "arc_options". There will be lesser need
to hard-code the options in the code itself. Moreover, ARC GDB will
use this population function, "disassembler_options_arc ()", to enable
the "set disassembler-option" for ARC targets. The gdb change will be
in a separate patch though.
The changes in this patch can be divided into:
1) Introduction of "disassembler_options_arc ()" that will return a
"disasm_option_and_arg_t" structure representing the disassembly
options and their likely arguments.
2) New data type "arc_options_arg_t" and new data "arc_options".
These are the internals for keeping track of options and arguments
entries that can easily be extended.
3) To print the options, the "print_arc_disassembler_options ()" has
been adjusted to use this dynamically built structure instead of having
them hard-coded inside.
To see this in effect, one can look into the output of:
$ ./binutils/objdump --help
...
The following ARC specific disassembler options are...
...
include/ChangeLog:
* dis-asm.h (disassembler_options_arc): New prototype.
opcodes/ChangeLog:
* arc-dis.c (arc_option_arg_t): New enumeration.
(arc_options): New variable.
(disassembler_options_arc): New function.
(print_arc_disassembler_options): Reimplement in terms of
"disassembler_options_arc".
opcodes/
* ppc-dis.c (lookup_powerpc): Test deprecated field when -Many.
Don't special case PPC_OPCODE_RAW.
(lookup_prefix): Likewise.
(lookup_vle, lookup_spe2): Similarly. Add dialect parameter and..
(print_insn_powerpc): ..update caller.
* ppc-opc.c (EXT): Define.
(powerpc_opcodes): Mark extended mnemonics with EXT.
(prefix_opcodes, vle_opcodes): Likewise.
(XISEL, XISEL_MASK): Add cr field and simplify.
(powerpc_opcodes): Use XISEL with extended isel mnemonics and sort
all isel variants to where the base mnemonic belongs. Sort dstt,
dststt and dssall.
gas/
* testsuite/gas/ppc/raw.s,
* testsuite/gas/ppc/raw.d: New test.
* testsuite/gas/ppc/ppc.exp: Run it.
Group legacy instructions using the COP0, COP2, COP3 opcodes together
and by their coprocessor number, and move them towards the end of the
opcode table. No functional change.
With the addition of explicit ISA exclusions this is maybe not strictly
necessary anymore as the individual legacy instructions are not supposed
to match ISA levels or CPU implementations that have discarded them or
replaced with a new instruction each, but let's not have them scattered
randomly across blocks of unrelated instruction sets where someone chose
to put them previously. Perhaps they could be put back in alphabetical
order in the main instruction block, but let's leave it for another
occasion.
opcodes/
* mips-opc.c (mips_builtin_opcodes): Reorder legacy COP0, COP2,
COP3 opcode instructions.
Adjust opcode table entries for coprocessor instructions that have been
removed from certain ISA levels or CPU implementations as follows:
- remove CP0 memory access instructions from MIPS II up as the LWC0 and
SWC0 opcodes have been reused for the LL and SC instructions
respectively[1]; strictly speaking LWC0 and SWC0 have never really
been defined in the first place[2], but let's keep them for now in
case an odd implementation did,
- remove CP0 branch instructions from MIPS IV[3] and MIPS32[4] up, as
they have been removed as from those ISAs,
- remove CP0 control register move instructions from MIPS32 up, as they
have been removed as from that ISA[5],
- remove the RFE instruction from MIPS III[6] and MIPS32[7] up, as it
has been removed as from those ISAs in favour to ERET,
- remove CP2 instructions from Vr5400 CPUs as their encodings have been
reused for the multimedia instruction set extensions[8] and no CP2
registers exist[9],
- remove CP3 memory access instructions from MIPS III up as coprocessor
3 has been removed as from that ISA[10][11] and from MIPS32 up as the
LWC3 opcode has been reused for the PREF instruction and consequently
all the four memory access instructions removed from the ISA (though
the COP3 opcode has been retained)[12].
Update the testsuite accordingly.
References:
[1] Charles Price, "MIPS IV Instruction Set", MIPS Technologies, Inc.,
Revision 3.2, September, 1995, Table A-38 "CPU Instruction Encoding
- MIPS II Architecture", p. A-178
[2] same, Section A.2.5.1 "Coprocessor Load and Store", p. A-12
[3] "MIPS R10000 Microprocessor User's Manual", Version 2.0, MIPS
Technologies, Inc., January 29, 1997, Section 14.25 "CP0
Instructions", Subsection "Branch on Coprocessor 0", p. 285
[4] "MIPS32 Architecture For Programmers, Volume II: The MIPS32
Instruction Set", MIPS Technologies, Inc., Document Number:
MD00086, Revision 1.00, June 9, 2003, Table A-9 "MIPS32 COP0
Encoding of rs Field", p. 242
[5] same
[6] Joe Heinrich, "MIPS R4000 Microprocessor User's Manual", Second
Edition, MIPS Technologies, Inc., April 1, 1994, Figure A-2 "R4000
Opcode Bit Encoding", p. A-182
[8] "Vr5432 64-bit MIPS RISC Microprocessor User's Manual, Volume 1",
NEC Electronics Inc., Document No. U13751EU5V0UM00, May 2000,
Section 1.2.3 "CPU Instruction Set Overview", p. 9
[9] "Vr5432 64-bit MIPS RISC Microprocessor User's Manual, Volume 2",
NEC Electronics Inc., Document No. U13751EU5V0UM00, May 2000,
Section 19.2 "Multimedia Instruction Format", p. 681
[10] Charles Price, "MIPS IV Instruction Set", MIPS Technologies, Inc.,
Revision 3.2, September, 1995, Section A 8.3.4 "Coprocessor 3 -
COP3 and CP3 load/store", p. A-176
[11] same, Table A-39 "CPU Instruction Encoding - MIPS III
Architecture", p. A-179
[12] "MIPS32 Architecture For Programmers, Volume II: The MIPS32
Instruction Set", MIPS Technologies, Inc., Document Number:
MD00086, Revision 1.00, August 29, 2002, Table A-2 "MIPS32 Encoding
of the Opcode Field", p. 241
opcodes/
* mips-opc.c (mips_builtin_opcodes): Update exclusion list for
"ldc2", "ldc3", "lwc0", "lwc2", "lwc3", "sdc2", "sdc3", "swc0",
"swc2", "swc3", "cfc0", "ctc0", "bc2f", "bc2fl", "bc2t",
"bc2tl", "cfc2", "ctc2", "dmfc2", "dmtc2", "mfc2", "mtc2",
"bc3f", "bc3fl", "bc3t", "bc3tl", "cfc3", "ctc3", "mfc3",
"mtc3", "bc0f", "bc0fl", "bc0t", "bc0tl", "rfe", "c2", "c3",
"cop2", and "cop3" entries.
gas/
* testsuite/gas/mips/mips32@isa-override-1.d: Update for LDC3
instruction removal.
* testsuite/gas/mips/mips32r2@isa-override-1.d: Likewise.
Coprocessor 3 has been removed from the MIPS ISA as from MIPS III[1][2]
with the LDC3 and SDC3 instructions having been replaced with LD and SD
instructions respectively and therefore the doubleword move instructions
from and to that coprocessor have never materialized (for 32-bit ISAs
coprocessor 3 has likewise been removed as from MIPS32r2[3]). Remove
the DMFC3 and DMTC3 instructions from the opcode table then to avoid
confusion.
References:
[1] Charles Price, "MIPS IV Instruction Set", MIPS Technologies, Inc.,
Revision 3.2, September, 1995, Section A 8.3.4 "Coprocessor 3 - COP3
and CP3 load/store", p. A-176
[2] same, Table A-39 "CPU Instruction Encoding - MIPS III Architecture",
p. A-179
[3] "MIPS32 Architecture For Programmers, Volume II: The MIPS32
Instruction Set", MIPS Technologies, Inc., Document Number: MD00086,
Revision 2.00, June 9, 2003, Table A-2 "MIPS32 Encoding of the
Opcode Field", p. 317
opcodes/
* mips-opc.c (mips_builtin_opcodes): Remove "dmfc3" and "dmtc3"
entries and associated comments.
Fix a commit b015e599c7 ("[MIPS] Add new virtualization instructions"),
<https://sourceware.org/ml/binutils/2013-05/msg00118.html>, regression
and bring the disassembly of the RFE instruction back for the relevant
ISA levels.
It is because the "rfe" opcode table entry was incorrectly moved behind
the catch-all generic "c0" entry for CP0 instructions, causing output
like:
00: 42000010 c0 0x10
to be produced rather than:
00: 42000010 rfe
even for ISA levels that do include the RFE instruction.
Move the "rfe" entry ahead of "c0" then, correcting the problem. Add a
suitable test case.
opcodes/
* mips-opc.c (mips_builtin_opcodes): Move the "rfe" entry ahead
of "c0".
gas/
* testsuite/gas/mips/rfe.d: New test.
* testsuite/gas/mips/rfe.s: New test source.
* testsuite/gas/mips/mips.exp: Run the new test.
The two CP1 control registers defined by legacy ISAs used to be referred
to by various names, such as FCR0, FCR31, FSR, however their documented
full names have always been the Implementation and Revision, and Control
and Status respectively, so the FIR and FCSR acronyms coming from modern
ISA revisions will be just as unambiguous while improving the clarity of
disassembly. Do not update the TX39 though as it did not have an FPU.
opcodes/
* mips-dis.c (mips_cp1_names_mips): New variable.
(mips_arch_choices): Use it rather than `mips_cp1_names_numeric'
for "r3000", "r4000", "r4010", "vr4100", "vr4111", "vr4120",
"r4300", "r4400", "r4600", "r4650", "r5000", "vr5400", "vr5500",
"r5900", "r6000", "rm7000", "rm9000", "r8000", "r10000",
"r12000", "r14000", "r16000", "mips5", "loongson2e", and
"loongson2f".
gas/
* testsuite/gas/mips/cp1-names-r3900.d: New test.
* testsuite/gas/mips/mips.exp: Run the new test.
* testsuite/gas/mips/branch-misc-3.d: Update disassembly
according to changes to opcodes.
* testsuite/gas/mips/cp1-names-r3000.d: Likewise.
* testsuite/gas/mips/cp1-names-r4000.d: Likewise.
* testsuite/gas/mips/relax-swap1-mips1.d: Likewise.
* testsuite/gas/mips/relax-swap1-mips2.d: Likewise.
* testsuite/gas/mips/trunc.d: Likewise.
The CP0 control register set has never been defined, however encodings
for the CFC0 and CTC0 instructions remained available for implementers
up until the MIPS32 ISA declared them invalid and causing the Reserved
Instruction exception[1]. Therefore we handle them for both assembly
and disassembly, however in the latter case the names of CP0 registers
from the regular set are incorrectly printed if named registers are
requested. This is because we do not define separate operand classes
for coprocessor regular and control registers respectively, which means
the disassembler has no way to tell the two cases apart. Consequently
nonsensical disassembly is produced like:
cfc0 v0,c0_random
Later the MIPSr5 ISA reused the encodings for XPA ASE MFHC0 and MTHC0
instructions[2] although it failed to document them in the relevant
opcode table until MIPSr6 only.
Correct the issue then by defining a new register class, OP_REG_CONTROL,
and corresponding operand codes, `g' and `y' for the two positions in
the machine instruction a control register operand can take. Adjust the
test cases affected accordingly.
While at it swap the regular MIPS opcode table "cfc0" and "ctc0" entries
with each other so that they come in the alphabetical order.
References:
[1] "MIPS32 Architecture For Programmers, Volume II: The MIPS32
Instruction Set", MIPS Technologies, Inc., Document Number: MD00086,
Revision 1.00, August 29, 2002, Table A-9 "MIPS32 COP0 Encoding of
rs Field", p. 242
[2] "MIPS Architecture For Programmers, Volume II-A: The MIPS32
Instruction Set", MIPS Technologies, Inc., Document Number: MD00086,
Revision 5.04, December 11, 2013, Section 3.2 "Alphabetical List of
Instructions", pp. 195, 216
include/
* opcode/mips.h: Document `g' and `y' operand codes.
(mips_reg_operand_type): Add OP_REG_CONTROL enumeration
constant.
gas/
* tc-mips.c (convert_reg_type) <OP_REG_CONTROL>: New case.
(macro) <M_TRUNCWS, M_TRUNCWD>: Use the `g' rather than `G'
operand code.
opcodes/
* mips-dis.c (print_reg) <OP_REG_COPRO>: Move control register
handling code over to...
<OP_REG_CONTROL>: ... this new case.
* mips-opc.c (decode_mips_operand) <'g', 'y'>: New cases.
(mips_builtin_opcodes): Update "cfc1", "ctc1", "cttc1", "cttc2",
"cfc0", "ctc0", "cfc2", "ctc2", "cfc3", and "ctc3" entries
replacing the `G' operand code with `g'. Update "cftc1" and
"cftc2" entries replacing the `E' operand code with `y'.
* micromips-opc.c (decode_micromips_operand) <'g'>: New case.
(micromips_opcodes): Update "cfc1", "cfc2", "ctc1", and "ctc2"
entries replacing the `G' operand code with `g'.
binutils/
* testsuite/binutils-all/mips/mips-xpa-virt-1.d: Correct CFC0
operand disassembly.
* testsuite/binutils-all/mips/mips-xpa-virt-3.d: Likewise.
The TX39 core has its distinct set of CP0 registers[1], so it needs a
separate table to hold their names. Add a test case accordingly.
References:
[1] "32-Bit RISC Microprocessor TX39 Family Core Architecture User's
Manual", Toshiba, Jul. 27, 1995, Section 2.2.2 "System control
coprocessor (CP0) registers", pp. 9-10
opcodes/
* mips-dis.c (mips_cp0_names_r3900): New variable.
(mips_arch_choices): Use it rather than `mips_cp0_names_numeric'
for "r3900".
gas/
* testsuite/gas/mips/cp0-names-r3900.d: New test.
* testsuite/gas/mips/mips.exp: Run it.
In the operand handling rewrite made for the MIPS disassembler with
commit ab90248154 ("Add structures to describe MIPS operands"),
<https://sourceware.org/ml/binutils/2013-07/msg00135.html>, the `g'
operand code has become redundant for the regular MIPS instruction set
by duplicating the OP_REG_COPRO semantics of the `G' operand code.
Later commit 351cdf24d2 ("Implement O32 FPXX, FP64 and FP64A ABI
extensions") converted the CTTC1 instruction from the `g' to the `G'
operand code, but still left a few instructions behind.
Convert the three remaining instructions still using the `g' code then,
namely: CTTC2, MTTC2 and MTTHC2, and remove all traces of the operand
code, freeing it up for other use.
opcodes/
* mips-opc.c (mips_builtin_opcodes): Switch "cttc2", "mttc2",
and "mtthc2" to using the `G' rather than `g' operand code for
the coprocessor control register referred.
include/
* opcode/mips.h: Complement change made to opcodes and remove
references to the `g' regular MIPS ISA operand code.
The DMTC1 instruction operates on a floating-point general register as
its second operand, however in the disassembly of the microMIPS encoding
a floating-point control register is shown instead. This is due to an
incorrect ordering of the two "dmtc1" entries in the opcode table, which
gives precedence to one using the `G' aka coprocessor format over one
using the `S' or floating-point register format.
The coprocessor format, or OP_REG_COPRO, is used so that GAS supports
referring to FPRs by their numbers in assembly, such as $0, $1, etc.
however in the case of CP1/FPU it is also used by the disassembler to
decode those numbers to the names of corresponding control registers.
This in turn causes nonsensical disassembly such as:
dmtc1 a1,c1_fir
in a reference to $f0. It has been like this ever since microMIPS ISA
support has been added.
Correct the ordering of the two entries then by swapping them with each
other, making disassembly output consistent with the regular MIPS DMTC1
instruction as well all the remaining CP1 move instructions. Adjust all
the test cases affected accordingly.
opcodes/
* micromips-opc.c (micromips_opcodes): Swap the two "dmtc1"
entries with each other.
gas/
* testsuite/gas/mips/micromips.d: Update disassembly according
to "dmtc1" entry fix with opcodes.
* testsuite/gas/mips/micromips-compact.d: Likewise.
* testsuite/gas/mips/micromips-insn32.d: Likewise.
* testsuite/gas/mips/micromips-noinsn32.d: Likewise.
* testsuite/gas/mips/micromips-trap.d: Likewise.
* testsuite/gas/mips/micromips@isa-override-1.d: Likewise.
All other cgen ports keep their generated desc & opc files under
opcodes/, so move the cris files over too. The cris-opc.c file,
while not generated, is already here to complement.
The initial problem I wanted to fix here is that GAS was rejecting MVE
instructions such as:
vmov q3[2], q3[0], r2, r2
with:
Error: General purpose registers may not be the same -- `vmov q3[2],q3[0],r2,r2'
which is incorrect; such instructions are valid. Note that for moves in
the other direction, e.g.:
vmov r2, r2, q3[2], q3[0]
GAS is correct in rejecting this as it does not make sense to move both
lanes into the same register (the Arm ARM says this is CONSTRAINED
UNPREDICTABLE).
After fixing this issue, I added assembly/disassembly tests for these
vmovs. This revealed several disassembly issues, including incorrectly
marking the moves into vector lanes as UNPREDICTABLE, and disassembling
many of the vmovs as vector loads. These are now fixed.
gas/ChangeLog:
* config/tc-arm.c (do_mve_mov): Only reject vmov if we're moving
into the same GPR twice.
* testsuite/gas/arm/mve-vmov-bad-2.l: Tweak error message.
* testsuite/gas/arm/mve-vmov-3.d: New test.
* testsuite/gas/arm/mve-vmov-3.s: New test.
opcodes/ChangeLog:
* arm-dis.c (mve_opcodes): Fix disassembly of
MVE_VMOV2_GP_TO_VEC_LANE when idx == 1.
(is_mve_encoding_conflict): MVE vector loads should not match
when P = W = 0.
(is_mve_unpredictable): It's not unpredictable to use the same
source register twice (for MVE_VMOV2_GP_TO_VEC_LANE).
The gotha() relocation mnemonic will be outputted by OpenRISC GCC when
using the -mcmodel=large option. This relocation is used along with
got() to generate 32-bit GOT offsets. This increases the previous GOT
offset limit from the previous 16-bit (64K) limit.
This is needed on large binaries where the GOT grows larger than 64k.
bfd/ChangeLog:
PR 21464
* bfd-in2.h: Add BFD_RELOC_OR1K_GOT_AHI16 relocation.
* elf32-or1k.c (or1k_elf_howto_table, or1k_reloc_map): Likewise.
(or1k_final_link_relocate, or1k_elf_relocate_section,
or1k_elf_check_relocs): Likewise.
* libbfd.h (bfd_reloc_code_real_names): Likewise.
* reloc.c: Likewise.
cpu/ChangeLog:
PR 21464
* or1k.opc (or1k_imm16_relocs, parse_reloc): Define parse logic
for gotha() relocation.
include/ChangeLog:
PR 21464
* elf/or1k.h (elf_or1k_reloc_type): Define R_OR1K_GOT_AHI16 number.
opcodes/ChangeLog:
PR 21464
* or1k-asm.c: Regenerate.
gas/ChangeLog:
PR 21464
* testsuite/gas/or1k/reloc-1.s: Add test for new relocation.
* testsuite/gas/or1k/reloc-1.d: Add test result for new
relocation.
Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
fixup reloc, add tests
Over the years I've seen a number of instances where people used
lea (%reg1), %reg2
or
lea symbol, %reg
despite the same thing being expressable via MOV. Since additionally
LEA often has restrictions towards the ports it can be issued to, while
MOV typically gets dealt with simply by register renaming, transform to
MOV when possible (without growing opcode size and without altering
involved relocation types).
Note that for Mach-O the new 64-bit testcases would fail (for
BFD_RELOC_X86_64_32S not having a representation), and hence get skipped
there.
Display literal value loaded with l32r opcode as a part of disassembly.
This significantly simplifies reading of disassembly output.
2020-04-23 Max Filippov <jcmvbkbc@gmail.com>
opcodes/
* xtensa-dis.c (print_xtensa_operand): For PC-relative operand
of l32r fetch and display referenced literal value.
Output literals as 4-byte words, not as separate bytes.
2021-04-23 Max Filippov <jcmvbkbc@gmail.com>
opcodes/
* xtensa-dis.c (print_insn_xtensa): Set info->bytes_per_chunk
to 4 for literal disassembly.
This patch adds support to four new system registers (RPAOS, RPALOS, PAALLOS,
PAALL) in conjunction with TLBI instruction. This change is part of RME (Realm
Management Extension).
gas/ChangeLog:
2021-04-19 Przemyslaw Wirkus <przemyslaw.wirkus@arm.com>
* NEWS: Update news.
* testsuite/gas/aarch64/rme.d: Update test.
* testsuite/gas/aarch64/rme.s: Update test.
opcodes/ChangeLog:
2021-04-19 Przemyslaw Wirkus <przemyslaw.wirkus@arm.com>
* aarch64-opc.c: Add new registers (RPAOS, RPALOS, PAALLOS, PAALL) support for
TLBI instruction.
This patch adds support to two new system registers (CIPAPA, CIGDPAPA) in
conjunction with DC instruction. This change is part of RME (Realm Management
Extension).
gas/ChangeLog:
2021-04-19 Przemyslaw Wirkus <przemyslaw.wirkus@arm.com>
* testsuite/gas/aarch64/rme.d: Update test.
* testsuite/gas/aarch64/rme.s: Update test.
opcodes/ChangeLog:
2021-04-19 Przemyslaw Wirkus <przemyslaw.wirkus@arm.com>
* aarch64-opc.c: Add new register (CIPAPA, CIGDPAPA) support for
DC instruction.
Patch 1: Fix diagnostics for exclusive load/stores and reclassify
Armv8.7-A ST/LD64 Atomics.
Following upstream pointing out some inconsistencies in diagnostics,
https://sourceware.org/pipermail/binutils/2021-February/115356.html
attached is a patch set that fixes the issues. I believe a combination
of two patches mainly contributed to these bugs:
https://sourceware.org/pipermail/binutils/2020-November/113961.htmlhttps://sourceware.org/pipermail/binutils/2018-June/103322.html
A summary of what this patch set fixes:
For instructions
STXR w0,x2,[x0]
STLXR w0,x2,[x0]
The warning we emit currently is misleading:
Warning: unpredictable: identical transfer and status registers --`stlxr w0,x2,[x0]'
Warning: unpredictable: identical transfer and status registers --`stxr w0,x2,[x0]'
it ought to be:
Warning: unpredictable: identical base and status registers --`stlxr w0,x2,[x0]'
Warning: unpredictable: identical base and status registers --`stxr w0,x2,[x0]'
For instructions:
ldaxp x0,x0,[x0]
ldxp x0,x0,[x0]
The warning we emit is incorrect
Warning: unpredictable: identical transfer and status registers --`ldaxp x0,x0,[x0]'
Warning: unpredictable: identical transfer and status registers --`ldxp x0,x0,[x0]'
it ought to be:
Warning: unpredictable load of register pair -- `ldaxp x0,x0,[x0]'
Warning: unpredictable load of register pair -- `ldxp x0,x0,[x0]'
For instructions
stlxp w0, x2, x2, [x0]
stxp w0, x2, x2, [x0]
We don't emit any warning when it ought to be:
Warning: unpredictable: identical base and status registers --`stlxp w0,x2,x2,[x0]'
Warning: unpredictable: identical base and status registers --`stxp w0,x2,x2,[x0]'
For instructions:
st64bv x0, x2, [x0]
st64bv x2, x0, [x0]
We incorrectly warn when its not necessary. This is because we classify them
incorrectly as ldstexcl when it should be lse_atomics in the opcode table.
The incorrect classification makes it pick up the warnings from warning on
exclusive load/stores.
Patch 2: Reclassify Armv8.7-A ST/LD64 Atomics.
This patch reclassifies ST64B{V,V0}, LD64B as lse_atomics rather than ldstexcl
according to their encoding class as specified in the architecture. This also
has the fortunate side-effect of spurious unpredictable warnings getting
eliminated.
For eg. For instruction:
st64bv x0, x2, [x0]
We incorrectly warn when its not necessary:
Warning: unpredictable: identical transfer and status registers --`st64bv x0,x2,[x0]'
This is because we classify them incorrectly as ldstexcl when it should be
lse_atomics in the opcode table. The incorrect classification makes it pick
up the warnings from warning on exclusive load/stores. This patch fixes it
by reclassifying it and no warnings are issued for this instruction.
opcodes/ChangeLog:
2021-04-09 Tejas Belagod <tejas.belagod@arm.com>
* aarch64-tbl.h (struct aarch64_opcode aarch64_opcode_table): Reclassify
LD64/ST64 instructions to lse_atomic instead of ldstexcl.
This adds some annotation to Power10 pcrel instructions, displaying
the target address (ie. pc + D34 field) plus a symbol if there is one
at exactly that target address. pld from the .got or .plt will also
look up the entry and display it, symbolically if there is a dynamic
relocation on the entry.
include/
* dis-asm.h (struct disassemble_info): Add dynrelbuf and dynrelcount.
binutils/
* objdump.c (struct objdump_disasm_info): Delete dynrelbuf and
dynrelcount.
(find_symbol_for_address): Adjust for dynrelbuf and dynrelcount move.
(disassemble_section, disassemble_data): Likewise.
opcodes/
* ppc-dis.c (struct dis_private): Add "special".
(POWERPC_DIALECT): Delete. Replace uses with..
(private_data): ..this. New inline function.
(disassemble_init_powerpc): Init "special" names.
(skip_optional_operands): Add is_pcrel arg, set when detecting R
field of prefix instructions.
(bsearch_reloc, print_got_plt): New functions.
(print_insn_powerpc): For pcrel instructions, print target address
and symbol if known, and decode plt and got loads too.
gas/
* testsuite/gas/ppc/prefix-pcrel.d: Update expected output.
* testsuite/gas/ppc/prefix-reloc.d: Likewise.
* gas/testsuite/gas/ppc/vsx_32byte.d: Likewise.
ld/
* testsuite/ld-powerpc/inlinepcrel-1.d: Update expected output.
* testsuite/ld-powerpc/inlinepcrel-2.d: Likewise.
* testsuite/ld-powerpc/notoc2.d: Likewise.
* testsuite/ld-powerpc/notoc3.d: Likewise.
* testsuite/ld-powerpc/pcrelopt.d: Likewise.
* testsuite/ld-powerpc/startstop.d: Likewise.
* testsuite/ld-powerpc/tlsget.d: Likewise.
* testsuite/ld-powerpc/tlsget2.d: Likewise.
* testsuite/ld-powerpc/tlsld.d: Likewise.
* testsuite/ld-powerpc/weak1.d: Likewise.
* testsuite/ld-powerpc/weak1so.d: Likewise.
Note that this doesn't implement the ISA to the letter regarding
dcbtds (and dcbtstds), which says that the TH field may be zero. That
doesn't make sense because allowing TH=0 would mean you no long have a
dcbtds but rather a dcbtct instruction. I'm interpreting the ISA
wording about allowing TH=0 to mean that the TH field of dcbtds is
optional (in which case the TH value is 0b1000).
opcodes/
PR 27676
* ppc-opc.c (DCBT_EO): Move earlier.
(insert_thct, extract_thct, insert_thds, extract_thds): New functions.
(powerpc_operands): Add THCT and THDS entries.
(powerpc_opcodes): Add dcbtstct, dcbtstds, dcbna, dcbtct, dcbtds.
gas/
* testsuite/gas/ppc/pr27676.d,
* testsuite/gas/ppc/pr27676.s: New test.
* testsuite/gas/ppc/ppc.exp: Run it.
* testsuite/gas/ppc/dcbt.d: Update.
* testsuite/gas/ppc/power4_32.d: Update.
The former two are unused anyway. And having such constants isn't very
helpful either, when they live in a place where updating the register
table wouldn't even allow noticing the need to adjust these constants.
st(1) ... st(7) will never be looked up in the hash table, so there's no
point inserting the entries. It's also not really necessary to do a 2nd
hash lookup after parsing the register number, nor is there a real
reason for having both st and st(0) entries. Plus we can easily do away
with the need for st to be first in the table.
For a long time there hasn't been a need anymore to keep together all
templates with identical mnemonics. Move the MOVQ and MOVABS ones next
to their MOV counterparts. Move the string forms of CMPSD and MOVSD next
to their CMPS / MOVS counterparts. Re-arrange what so fgar was the SSE3
section.
This makes reasonably obvious that MONITOR/MWAIT aren't suitable to
cover by CpuSSE3, but adjusting this is left for another time.
In commit 79dec6b7ba ("x86-64: optimize certain commutative
VEX-encoded insns") I missed the fact that there being subtraction
involved here doesn't matter, as absolute differences get summed up.
This way not only the overall (source) table size shrinks by quite a
bit and the risk of related templates going out of sync with one another
gets lowered, but also (dis)similarities between neighboring templates
become easier to spot.
Note that for certain SSE2AVX templates this results in benign attribute
changes:
- LDMXCSR and STMXCSR: NoAVX gets set,
- MOVMSKPS, PMOVMSKB, PEXTR{B,W} (register destination), and PINSR{B,W}
(register source): IgnoreSize and NoRex64 get set,
- CVT{DQ,PS}2PD, CVTSD2SS, MOVMSKPD, MOVDDUP, PMOV{S,Z}X{BW,WD,DQ}, and
ROUNDSD: NoRex64 gets set,
- CVTSS2SD, INSERTPS, PEXTRW (memory destination), PINSRW (memory
source), and PMOV{S,Z}X{BD,WQ,BQ}: IgnoreSize gets set.
Similarly the "normal" (non-SSE2AVX)
- non-64-bit CVTS{I,S}2SD forms get NoRex64 set,
- CMP{EQ,ORD,NEQ,UNORD}{P,S}{S,D} forms get C set,
all again in a benign way.
The remaining differences in the generated table are due to re-ordering
of entries in the course of being folded into templates.
The table entries are more natural to read (and slightly shorter) when
the prefixes, like is the case for VEX/XOP/EVEX-encoded entries, are
specified as part of the opcode. This is particularly noticable for
side-by-side legacy and SSE2AVX entries.
An implication is that we now need to use "unsigned long long" for the
initially parsed opcode in i386-gen. I don't expect this to be an issue.
Now that all base opcodes are only at most 2 bytes in size, shrink its
template field to just as much. By also shrinking extension_opcode and
operands to just what they really need, we can free up an entire 32-bit
slot (plus 4 left bits past the bitfields themselves).
At present this alters sizeof(struct insn_template) only for 32-bit
builds. In 64-bit builds it instead leaves a padding hole that will
allow to buffer future growth of other fields (opcode_modifier,
cpu_flags, operand_types[]).
Just like is already done for VEX/XOP/EVEX encoded insns, record the
encoding space information in the respective opcode modifier field. Do
this again without changing the source table, but rather by deriving the
values from their existing source representation.
