https://sourceware.org/bugzilla/show_bug.cgi?id=34307
Bug ID: 34307
Summary: [avr] GAS diagnoses wrong instruction when not
supported by an ISA
Product: binutils
Version: 2.45
Status: NEW
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: gjl at gcc dot gnu.org
Target Milestone: ---
When there is an AVR instruction in include/opcode/avr.h that is not supported
by a specific core, then gas will diagnose with the nmemonic of the next
instruction:
mul 1,2
mulsu 1,1
lat
$ avr-as x.sx
x.sx: Assembler messages:
x.sx:1: Error: illegal opcode or for mcu avr2
x.sx:2: Error: illegal opcode fmul for mcu avr2
x.sx:3: Error: illegal opcode movw for mcu avr2
The reason is that in gas/config/tc-avr.c::md_assemble() we have this loop:
while ((opcode->isa & avr_mcu->isa) != opcode->isa)
{
opcode++;
if (opcode->name && strcmp(op, opcode->name))
{
as_bad (_("illegal opcode %s for mcu %s"),
opcode->name, avr_mcu->name);
return;
}
}
which in the as_bad case prints the next instruction's mnemonic due to the
opcode++ above.
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