Commit Graph

3324 Commits

Author SHA1 Message Date
Alan Modra
7ef412cf72 ubsan: xgate: left shift of negative value
* xgate-dis.c (print_insn): Don't left shift signed value.
	(ripBits): Formatting, use 1u.
2020-01-13 12:12:05 +10:30
Alan Modra
7f578b959c ubsan: tilepro: signed integer overflow
* tilepro-opc.c (parse_insn_tilepro): Make opval unsigned.
	* tilegx-opc.c (parse_insn_tilegx): Likewise.  Delete raw_opval.
2020-01-10 17:32:33 +10:30
Alan Modra
441af85bd9 ubsan: m10300: shift exponent -4
* m10300-dis.c (disassemble): Move extraction of DREG, AREG, RREG,
	and XRREG value earlier to avoid a shift with negative exponent.
	* m10200-dis.c (disassemble): Similarly.
2020-01-10 17:32:33 +10:30
Nick Clifton
bce58db4fb Fix the cast used to prevent compile time warning about an always false test.
PR 25224
	* z80-dis.c (ld_ii_ii): Use correct cast.
2020-01-09 14:32:49 +00:00
Sergey Belyashov
40c75bc8b0 Fix compile time warnings about comparisons always being false.
PR 25224
gas	* config/tc-z80.c (emit_ld_m_rr): Use integer types when checking
	opcode byte values.
	(emit_ld_r_r): Likewise.
	(emit_ld_rr_m): Likewise.
	(emit_ld_rr_nn): Likewise.

opcodes	* z80-dis.c (ld_ii_ii): Use character constant when checking
	opcode byte value.
2020-01-09 11:49:18 +00:00
Jan Beulich
d835a58baa x86: SYSENTER/SYSEXIT are unavailable in 64-bit mode on AMD
The disassembler change is such that in default mode we'd disassemble
the insns (for there not ebing any conflicts), but when AMD64 mode was
explicitly requested, we'd show them as "(bad)".
2020-01-09 11:38:01 +01:00
Alan Modra
030a2e78ac ubsan: z8k: index 10 out of bounds for type 'unsigned int const[10]'
The fix is the additional ARRAY_SIZE test, the rest just tidies
variable types rather than adding a cast to avoid warnings.

opcodes/
	* z8k-dis.c: Include libiberty.h
	(instr_data_s): Make max_fetched unsigned.
	(z8k_lookup_instr): Make nibl_index and tabl_index unsigned.
	Don't exceed byte_info bounds.
	(output_instr): Make num_bytes unsigned.
	(unpack_instr): Likewise for nibl_count and loop.
	* z8kgen.c (gas <opcode_entry_type>): Make noperands, length and
	idx unsigned.
	* z8k-opc.h: Regenerate.
gas/
	* config/tc-z8k.c (md_begin): Make idx unsigned.
	(get_specific): Likewise for this_index.
2020-01-08 21:51:32 +10:30
Shahab Vahedi
bb82aefe17 [ARC] Add finer details for LLOCK and SCOND
This patch changes the "class" of LLOCK/SCOND from "MEMORY" to
"LLOCK/SCOND" respectively. Moreover, it corrects the "data_size_mode".

These changes are necessary for GDB's atmoic sequence handler.

Signed-off-by: Shahab Vahedi <shahab@synopsys.com>
2020-01-07 15:25:34 +02:00
Alan Modra
cc6aa1a6e0 ubsan: m32c: left shift of negative value
There are probably a lot more of these still here.

cpu/
	* m32c.cpu (f-dsp-8-u16, f-dsp-8-s16): Rearrange to mask any sign
	bits before shifting rather than masking after shifting.
	(f-dsp-16-u16, f-dsp-16-s16, f-dsp-32-u16, f-dsp-32-s16): Likewise.
	(f-dsp-40-u16, f-dsp-40-s16, f-dsp-48-u16, f-dsp-48-s16): Likewise.
	(f-dsp-64-u16, f-dsp-8-s24): Likewise.
	(f-bitbase32-16-s19-unprefixed): Avoid signed left shift.
opcodes/
	* m32c-ibld.c: Regenerate.
2020-01-06 21:53:51 +10:30
Alan Modra
660e62b1d9 PR25344, z80 disassembler recursion
PR 25344
	* z80-dis.c (suffix): Don't use a local struct buffer copy.
	Peek at next byte to prevent recursion on repeated prefix bytes.
	Ensure uninitialised "mybuf" is not accessed.
	(print_insn_z80): Don't zero n_fetch and n_used here,..
	(print_insn_z80_buf): ..do it here instead.
2020-01-06 21:53:16 +10:30
Alan Modra
c9ae58fe32 ubsan: m32r: left shift of negative value
cpu/
	* m32r.cpu (f-disp8): Avoid left shift of negative values.
	(f-disp16, f-disp24): Likewise.
opcodes/
	* m32r-ibld.c: Regenerate.
2020-01-04 19:20:33 +10:30
Alan Modra
5f57d4ecf5 ubsan: cr16: left shift cannot be represented in type 'int'
* cr16-dis.c (cr16_match_opcode): Avoid shift left of signed value.
2020-01-04 19:20:33 +10:30
Alan Modra
2c5c119630 ubsan: crx: left shift cannot be represented in type 'int'
* crx-dis.c (match_opcode): Avoid shift left of signed value.
2020-01-04 19:20:33 +10:30
Alan Modra
2e98c6c5c5 ubsan: d30v: left shift cannot be represented in type 'int'
* d30v-dis.c (print_insn): Avoid signed overflow in left shift.
2020-01-04 19:20:33 +10:30
Jan Beulich
5437a02abc Arm64: correct address index operands for LD1RO{H,W,D}
Just like their LD1RQ{H,W,D} counterparts, as per the specification the
index registers get scaled by element size.
2020-01-03 10:16:44 +01:00
Jan Beulich
567dfba2be Arm64: correct {su,us}dot SIMD encodings
According to the specification these permit the Q bit to control the
vector length operated on, and hence this bit should not already be set
in the opcode table entries (it rather needs setting dynamically). Note
how the test case output did also not match its input. Besides
correcting the test case also extend it to cover both forms.
2020-01-03 10:14:16 +01:00
Jan Beulich
8c45011acd Arm64: correct uzp{1,2} mnemonics
According to the specification, and in line with the pre-existing
predicate forms, the mnemonics do not include an 'i'.
2020-01-03 10:13:31 +01:00
Jan Beulich
f4950f76fa Arm64: correct 64-bit element fmmla encoding
There's just one bit of difference to the 32-bit element form, as
per the documentation.
2020-01-03 10:12:49 +01:00
Sergey Belyashov
6655dba246 Add support for the GBZ80, Z180, and eZ80 variants of the Z80 architecure. Add an ELF based target for these as well.
PR 25224
bfd	* Makefile.am: Add z80-elf target support.
	* configure.ac: Likewise.
	* targets.c: Likewise.
	* config.bfd: Add z80-elf target support and new arches: ez80 and z180.
	* elf32-z80.c: New file.
	* archures.c: Add new z80 architectures: eZ80 and Z180.
	* coffcode.h: Likewise.
	* cpu-z80.c: Likewise.
	* bfd-in2.h: Likewise plus additional Z80 relocations.
	* coff-z80.c: Add new relocations for Z80 target and local label check.

gas	* config/tc-z80.c: Add new architectures: Z180 and eZ80. Add support
	for assembler code generated by SDCC. Add new relocation types. Add
	z80-elf target support.
	* config/tc-z80.h: Add z80-elf target support. Enable dollar local
	labels. Local labels starts from ".L".
	* testsuite/gas/all/fwdexp.d: Fix failure due to symbol conflict.
	* testsuite/gas/all/fwdexp.s: Likewise.
	* testsuite/gas/z80/suffix.d: Fix failure on ELF target.
	* testsuite/gas/z80/z80.exp: Add new tests
	* testsuite/gas/z80/dollar.d: New file.
	* testsuite/gas/z80/dollar.s: New file.
	* testsuite/gas/z80/ez80_adl_all.d: New file.
	* testsuite/gas/z80/ez80_adl_all.s: New file.
	* testsuite/gas/z80/ez80_adl_suf.d: New file.
	* testsuite/gas/z80/ez80_isuf.s: New file.
	* testsuite/gas/z80/ez80_z80_all.d: New file.
	* testsuite/gas/z80/ez80_z80_all.s: New file.
	* testsuite/gas/z80/ez80_z80_suf.d: New file.
	* testsuite/gas/z80/r800_extra.d: New file.
	* testsuite/gas/z80/r800_extra.s: New file.
	* testsuite/gas/z80/r800_ii8.d: New file.
	* testsuite/gas/z80/r800_z80_doc.d: New file.
	* testsuite/gas/z80/z180.d: New file.
	* testsuite/gas/z80/z180.s: New file.
	* testsuite/gas/z80/z180_z80_doc.d: New file.
	* testsuite/gas/z80/z80_doc.d: New file.
	* testsuite/gas/z80/z80_doc.s: New file.
	* testsuite/gas/z80/z80_ii8.d: New file.
	* testsuite/gas/z80/z80_ii8.s: New file.
	* testsuite/gas/z80/z80_in_f_c.d: New file.
	* testsuite/gas/z80/z80_in_f_c.s: New file.
	* testsuite/gas/z80/z80_op_ii_ld.d: New file.
	* testsuite/gas/z80/z80_op_ii_ld.s: New file.
	* testsuite/gas/z80/z80_out_c_0.d: New file.
	* testsuite/gas/z80/z80_out_c_0.s: New file.
	* testsuite/gas/z80/z80_reloc.d: New file.
	* testsuite/gas/z80/z80_reloc.s: New file.
	* testsuite/gas/z80/z80_sli.d: New file.
	* testsuite/gas/z80/z80_sli.s: New file.

ld	* Makefile.am: Add new target z80-elf
	* configure.tgt: Likewise.
	* emultempl/z80.em: Add support for eZ80 and Z180 architectures.
	* emulparams/elf32z80.sh: New file.
	* emultempl/z80elf.em: Likewise.
	* testsuite/ld-z80/arch_ez80_adl.d: Likewise.
	* testsuite/ld-z80/arch_ez80_z80.d: Likewise.
	* testsuite/ld-z80/arch_r800.d: Likewise.
	* testsuite/ld-z80/arch_z180.d: Likewise.
	* testsuite/ld-z80/arch_z80.d: Likewise.
	* testsuite/ld-z80/comb_arch_ez80_z80.d: Likewise.
	* testsuite/ld-z80/comb_arch_z180.d: Likewise.
	* testsuite/ld-z80/labels.s: Likewise.
	* testsuite/ld-z80/relocs.s: Likewise.
	* testsuite/ld-z80/relocs_b_ez80.d: Likewise.
	* testsuite/ld-z80/relocs_b_z80.d: Likewise.
	* testsuite/ld-z80/relocs_f_z80.d: Likewise.
	* testsuite/ld-z80/z80.exp: Likewise.

opcodes	* z80-dis.c: Add support for eZ80 and Z80 instructions.
2020-01-02 14:14:59 +00:00
Alan Modra
b14ce8bfe1 Re: Update year range in copyright notice of binutils files
Add the ChangeLog entry.
2020-01-01 18:55:18 +10:30
Alan Modra
0b11474080 ChangeLog rotation 2020-01-01 18:12:08 +10:30
Alan Modra
2c5b6e1a1c Re: Usage of unitialized heap in tic4x_print_cond
PR 25319
	* tic4x-dis.c (tic4x_print_cond): Correct order of xcalloc args.
2019-12-30 09:35:29 +10:30
Alan Modra
4383e1fc3b ubsan: sparc: left shift cannot be represented in type 'int'
* sparc-dis.c (SEX): Don't use left and right shift to sign extend.
	(compare_opcodes): Avoid signed shift left overflow.
	(print_insn_sparc): Likewise.
2019-12-29 22:13:27 +10:30
Alan Modra
8c5e259235 Usage of unitialized heap in tic4x_print_cond
PR 25319
	* tic4x-dis.c (tic4x_print_cond): Init all of condtable.
2019-12-29 22:13:12 +10:30
Jan Beulich
376cd05610 x86-64: fix Intel64 handling of branch with data16 prefix
The expectation of x86-64-branch-3 for "call" / "jmp" with an obvious
direct destination to translate to an indirect _far_ branch is plain
wrong. The operand size prefix should have no effect at all on the
interpretation of the operand. The main underlying issue here is that
the Intel64 templates of the direct branches don't include Disp16, yet
various assumptions exist that it would always be there when there's
also Disp32/Disp32S, toggled by the operand size prefix (which is
being ignored by direct branches in Intel64 mode).

Along these lines it was also wrong to base the displacement width
decision solely on the operand size prefix: REX.W cancels this effect
and hence needs taking into consideration, too.

A disassembler change is needed here as well: XBEGIN was wrongly treated
the same as direct CALL/JMP, which isn't the case - the operand size
prefix does affect displacement size there, it's merely ignored when it
comes to updating [ER]IP.
2019-12-27 09:38:34 +01:00
Jan Beulich
48bcea9f48 x86: consolidate Disp<NN> handling a little
In memory operand addressing, which forms of displacement are permitted
besides Disp8 is pretty clearly limited
- outside of 64-bit mode, Disp16 or Disp32 only, depending on address
  size (MPX being special in not allowing Disp16),
- in 64-bit mode, Disp32s or Disp64 without address size override, and
  solely Disp32 with one.
Adjust assembler and i386-gen to match this, observing that templates
already get adjusted before trying to match them against input depending
on the presence of an address size prefix.

This adjustment logic gets extended to all cases, as certain DispNN
values should also be dropped when there's no such prefix. In fact
behavior of the assembler, perhaps besides the exact diagnostics wording,
should not differ between there being templates applicable to 64-bit and
non-64-bit at the same time, or there being fully separate sets of
templates, with their DispNN settings already reduced accordingly.

This adjustment logic further gets guarded such that there wouldn't be
and Disp<N> conversion based on address size prefix when this prefix
doesn't control the width of the displacement (on branches other than
absolute ones).

These adjustments then also allow folding two MOV templates, which had
been split between 64-bit and non-64-bits variants so far.

Once in this area also
- drop the bogus DispNN from JumpByte templates, leaving just the
  correct Disp8 there (compensated by i386_finalize_displacement()
  now setting Disp8 on their operands),
- add the missing Disp32S to XBEGIN.

Note that the changes make it necessary to temporarily mark a test as
XFAIL; this will get taken care of by a subsequent patch. The failing
parts are entirely bogus and will get replaced.
2019-12-27 09:22:03 +01:00
Alan Modra
100b122fc1 ubsan: crx: index 5 out of bounds for type 'operand_desc const[5]'
* crx-dis.c (get_number_of_operands): Don't access operands[]
	out of bounds.
2019-12-26 17:49:03 +10:30
Alan Modra
6c2ca6c25d ubsan: v850: left shift cannot be represented in type 'int'
Another 1 << 31 complaint.

	* v850-dis.c (disassemble): Avoid signed overflow.  Don't use
	long vars when unsigned int will do.
2019-12-26 17:49:03 +10:30
Alan Modra
ebd1c6d1d3 ubsan: arm: shift exponent 32 is too large for 32-bit type 'unsigned int'
* arm-dis.c (print_insn_arm): Don't shift by 32 on unsigned int var.
2019-12-24 12:01:42 +10:30
Jan Beulich
0e62b37a3f ppc: misc minor build corrections
Avoid shadowing a libiberty symbol (which oldish gcc warns about by
default), and allow building cleanly on 32-bit distros.
2019-12-23 11:53:10 +01:00
Alan Modra
7936714c0c ubsan: score: left shift of 2 by 31 places cannot be represented in type 'int'
* score-dis.c (print_insn_score32): Avoid signed overflow.
	(print_insn_score48): Likewise.  Don't cast to int when printing
	hex values.
2019-12-23 18:05:19 +10:30
Alan Modra
3e1056a1a6 ubsan: iq2000: left shift of negative value
cpu/
	* iq2000.cpu (f-offset): Avoid left shift of negative values.
opcodes/
	* iq2000-ibld.c: Regenerate.
2019-12-23 18:04:12 +10:30
Alan Modra
1a1e2852a5 ubsan: d30v: left shift cannot be represented in type 'long long'
* d30v-dis.c (extract_value): Make num param a uint64_t, constify
	oper.  Use unsigned vars.
	(print_insn): Make num var uint64_t.  Constify oper and remove now
	unnecessary casts on extract_value calls.
	(print_insn_d30v): Use unsigned vars.  Adjust printf formats.
2019-12-23 18:02:44 +10:30
Alan Modra
27c1c4271a ubsan: wasm: shift is too large for 64-bit type 'bfd_vma'
bfd/
	* wasm-module.c (wasm_read_leb128): Don't allow oversize shifts.
	Catch value overflow.  Sign extend only on terminating byte.
opcodes/
	* wasm32-dis.c (wasm_read_leb128): Don't allow oversize shifts.
	Catch value overflow.  Sign extend only on terminating byte.
2019-12-23 17:58:09 +10:30
Alan Modra
cda8d785b3 PR25281, sh disassembler abort
PR 25281
	* sh-dis.c (print_insn_ddt): Properly check validity of MOVX_NOPY
	and MOVY_NOPX insns.  For invalid cases include 0xf000 in the word
	printed.  Print .word in more cases.
2019-12-20 17:57:58 +10:30
Alan Modra
bcd9f578a9 ubsan: or1k: left shift of negative value
cpu/
	* or1korbis.cpu (f-disp26, f-disp21): Don't left shift negative values.
opcodes/
	* or1k-ibld.c: Regenerate.
2019-12-20 17:57:58 +10:30
Alan Modra
15d2859fdd ubsan: hppa: left shift of negative value
bfd/
	* libhppa.h (hppa_field_adjust, bfd_hppa_insn2fmt): Delete forward
	declaration.  Move ATTRIBUTE_UNUSED to definition.
	(sign_extend, low_sign_extend, sign_unext, low_sign_unext),
	(re_assemble_3, re_assemble_12, re_assemble_14, re_assemble_16),
	(re_assemble_17, re_assemble_21, re_assemble_22): Likewise.  Make
	args and return value unsigned.  Use unsigned variables.
	(hppa_rebuild_insn): Similarly.
opcodes/
	* hppa-dis.c (extract_16, extract_21, print_insn_hppa): Use
	unsigned variables.
2019-12-20 13:36:06 +10:30
Alan Modra
000fe1a756 ubsan: m68hc1x: left shift of negative value
* m68hc11-dis.c (read_memory): Delete forward decls.
	(print_indexed_operand, print_insn): Likewise.
	(print_indexed_operand): Formatting.  Don't rely on short being
	exactly 16 bits, make sign extension explicit.
	(print_insn): Likewise.  Avoid signed overflow.
2019-12-20 13:36:06 +10:30
Alan Modra
f00901886d vax decoding of indexed addressing mode
This patch prevents print_insn_mode recursing into another index mode
byte, which if repeated enough times will overflow private.the_buffer
and scribble over other memory.

	* vax-dis.c (print_insn_mode): Stop index mode recursion.
2019-12-19 15:38:39 +10:30
Dr N.W. Filardo
1d29ab86cb PR25277, microblaze opcode enumeration vs ISO/IEC TS 18661-3:2015
fadd, fmul, and fdiv are now, by ISO/IEC TS 18661-3:2015, defined to
refer to functions from the runtime subsystem.

	PR 25277
	* microblaze-opcm.h (enum microblaze_instr): Prefix fadd, fmul and
	fdiv with "mbi_".
	* microblaze-opc.h (opcodes): Adjust to suit.
2019-12-19 10:54:47 +10:30
Alan Modra
2480b6fa94 More signed overflow fixes
The arc fix in create_map avoiding signed overflow by casting an
unsigned char to unsigned int before shifting, shows one of the
dangers of blinding doing that.  The problem in this case was that the
variable storing the value, newAuxRegister->address, was a long.
Using the unsigned cast meant that the 32-bit value was zero extended
when long is 64 bits.  Previously we had a sign extension.  Net result
was that comparisons in arcExtMap_auxRegName didn't match.  Of course,
I could have cast the 32-bit unsigned value back to signed before
storing in a long, but it's neater to just use an unsigned int for the
address.

opcodes/
	* alpha-opc.c (OP): Avoid signed overflow.
	* arm-dis.c (print_insn): Likewise.
	* mcore-dis.c (print_insn_mcore): Likewise.
	* pj-dis.c (get_int): Likewise.
	* ppc-opc.c (EBD15, EBD15BI): Likewise.
	* score7-dis.c (s7_print_insn): Likewise.
	* tic30-dis.c (print_insn_tic30): Likewise.
	* v850-opc.c (insert_SELID): Likewise.
	* vax-dis.c (print_insn_vax): Likewise.
	* arc-ext.c (create_map): Likewise.
	(struct ExtAuxRegister): Make "address" field unsigned int.
	(arcExtMap_auxRegName): Pass unsigned address.
	(dump_ARC_extmap): Adjust.
	* arc-ext.h (arcExtMap_auxRegName): Update prototype.
2019-12-18 18:38:13 +10:30
Alan Modra
eb7b504651 ubsan: visium: left shift cannot be represented in type 'int'
* visium-dis.c (print_insn_visium): Avoid signed overflow.
2019-12-17 23:15:12 +10:30
Alan Modra
29298bf66f ubsan: aarch64: left shift cannot be represented in type 'int64_t'
* aarch64-opc.c (value_fit_signed_field_p): Avoid signed overflow.
	(value_fit_unsigned_field_p): Likewise.
	(aarch64_wide_constant_p): Likewise.
	(operand_general_constraint_met_p): Likewise.
	* aarch64-opc.h (aarch64_wide_constant_p): Update prototype.
2019-12-17 22:58:19 +10:30
Alan Modra
e46d79a76e ubsan: nds32: left shift cannot be represented in type 'int'
Yet more.

	* nds32-dis.c (nds32_mask_opcode): Avoid signed overflow.
	(print_insn_nds32): Use uint64_t for "given" and "given1".
2019-12-17 22:58:11 +10:30
Alan Modra
5b660084e2 Remove tic80 support
This is one way of fixing ubsan bug reports, just delete the code.

The assembler support was removed back in 2005 along with other
non-BFD assemblers, but somehow the remainder of the port stayed in.

bfd/
	* coff-tic80.c: Delete file.
	* cpu-tic80.c: Delete file.
	* archures.c: Remove tic80 support.
	* coffcode.h: Likewise.
	* coffswap.h: Likewise.
	* targets.c: Likewise.
	* config.bfd: Likewise.
	* configure.ac: Likewise.
	* Makefile.am: Likewise.
	* Makefile.in: Regenerate.
	* bfd-in2.h: Regenerate.
	* configure: Regenerate.
	* po/SRC-POTFILES.in: Regenerate.
binutils/
	* testsuite/binutils-all/objcopy.exp: Remove tic80 support.
	* testsuite/binutils-all/objdump.exp: Likewise.
gas/
	* doc/as.texi: Remove mention of tic80.
include/
	* coff/tic80.h: Delete file.
	* opcode/tic80.h: Delete file.
ld/
	* emulparams/tic80coff.sh: Delete file.
	* scripttempl/tic80coff.sc: Delete file.
	* configure.tgt: Remove tic80 support.
	* Makefile.am: Likewise.
	* Makefile.in: Regenerate.
	* po/BLD-POTFILES.in: Regenerate.
opcodes/
	* tic80-dis.c: Delete file.
	* tic80-opc.c: Delete file.
	* disassemble.c: Remove tic80 support.
	* disassemble.h: Likewise.
	* Makefile.am: Likewise.
	* configure.ac: Likewise.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* po/POTFILES.in: Regenerate.
2019-12-17 16:36:54 +10:30
Alan Modra
62e6599087 ubsan: bpf: left shift cannot be represented in type 'DI' (aka 'long')
cpu/
	* bpf.cpu (f-imm64): Avoid signed overflow.
opcodes/
	* bpf-ibld.c: Regenerate.
2019-12-17 14:32:23 +10:30
Alan Modra
f81e7e2db6 ubsan: aarch64: left shift of negative value
* aarch64-dis.c (sign_extend): Return uint64_t.  Rewrite without
	conditional.
	(aarch64_ext_imm): Avoid signed overflow.
2019-12-16 17:35:13 +10:30
Alan Modra
488d02fe77 ubsan: microblaze: left shift cannot be represented in type 'int'
* microblaze-dis.c (read_insn_microblaze): Avoid signed overflow.
2019-12-16 17:35:13 +10:30
Alan Modra
8a92faab92 ubsan: nios2: left shift cannot be represented in type 'int'
* nios2-dis.c (nios2_print_insn_arg): Avoid signed overflow
2019-12-16 17:35:13 +10:30
Alan Modra
e6ced26afd ubsan: xstormy16: left shift of negative value
cpu/
	* xstormy16.cpu (f-rel12a): Avoid signed overflow.
opcodes/
	* xstormy16-ibld.c: Regenerate.
2019-12-16 17:35:13 +10:30