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| author | Claudiu Zissulescu <claziss@synopsys.com> | 2016-10-13 15:01:19 +0200 |
|---|---|---|
| committer | Claudiu Zissulescu <claziss@synopsys.com> | 2016-10-14 13:52:15 +0200 |
| commit | e5b06ef06b062f0626462abb182ee5470cf798bc (patch) | |
| tree | c0df3f5db56418cfaf7e1cd62bcc070d9d1cf53e /opcodes/arc-dis.c | |
| parent | afb1110bfa4fe150cb2f2c58329551bd82cb3627 (diff) | |
| download | gdb-e5b06ef06b062f0626462abb182ee5470cf798bc.zip gdb-e5b06ef06b062f0626462abb182ee5470cf798bc.tar.gz gdb-e5b06ef06b062f0626462abb182ee5470cf798bc.tar.bz2 | |
[ARC] Disassembler: fix LIMM detection for short instructions.
The ARC (short) instructions are using a special register number to
indicate is the instruction uses a long immediate (LIMM). In the case
of short instruction, this LIMM indicator depends on the ISA version
used. Thus, for ARCv1 processors, the LIMM indicator is 0x3E, the same
value used in "long" instructions. However, for the ARCv2 processors,
this LIMM indicator is 0x1E.
This patch fixes the LIMM detection for ARCv1 ISA and adds two tests.
gas/
2016-10-13 Claudiu Zissulescu <claziss@synopsys.com>
* testsuite/gas/arc/shortlimm_a7.d: New file.
* testsuite/gas/arc/shortlimm_a7.s: Likewise.
* testsuite/gas/arc/shortlimm_hs.d: Likewise.
* testsuite/gas/arc/shortlimm_hs.s: Likewise.
include/
2016-10-13 Claudiu Zissulescu <claziss@synopsys.com>
* opcode/arc.h (ARC_OPCODE_ARCV2): New define.
opcodes/
2016-10-13 Claudiu Zissulescu <claziss@synopsys.com>
* arc-dis.c (find_format_from_table): Discriminate LIMM indicator
usage on ISA basis.
Diffstat (limited to 'opcodes/arc-dis.c')
| -rw-r--r-- | opcodes/arc-dis.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/opcodes/arc-dis.c b/opcodes/arc-dis.c index c4e118e..898512c 100644 --- a/opcodes/arc-dis.c +++ b/opcodes/arc-dis.c @@ -296,7 +296,7 @@ find_format_from_table (struct disassemble_info *info, /* Possible candidate, check the operands. */ for (opidx = opcode->operands; *opidx; opidx++) { - int value; + int value, limmind; const struct arc_operand *operand = &arc_operands[*opidx]; if (operand->flags & ARC_OPERAND_FAKE) @@ -309,11 +309,12 @@ find_format_from_table (struct disassemble_info *info, /* Check for LIMM indicator. If it is there, then make sure we pick the right format. */ + limmind = (isa_mask & ARC_OPCODE_ARCV2) ? 0x1E : 0x3E; if (operand->flags & ARC_OPERAND_IR && !(operand->flags & ARC_OPERAND_LIMM)) { if ((value == 0x3E && insn_len == 4) - || (value == 0x1E && insn_len == 2)) + || (value == limmind && insn_len == 2)) { invalid = TRUE; break; |