http://sourceware.org/bugzilla/show_bug.cgi?id=12854
Summary: ARM: Nonsensical argument shift specifications
accepted for LSL/LSR/ASR/ROR mnemonics
Product: binutils
Version: 2.22 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gas
AssignedTo: [email protected]
ReportedBy: [email protected]
gas accepts a trailing ", <shift-op> <register-or-immediate>" for
LSL/LSR/ASR/ROR instructions, but this is invalid syntax.
The shift specification appears to be ignored, with no effect on the assembly;
rather, this trailing junk should be rejected with an error:
Observed on trunk, 20110606:
binutils$ gas/as-new -o tst.o <<EOF && arm-linux-gnueabi-objdump -d tst.o
asr r0, r1, r2, ror #5
ror r0, r1, r2, lsl r3
EOF
tst.o: file format elf32-littlearm
Disassembly of section .text:
00000000 <.text>:
0: e1a00251 asr r0, r1, r2
4: e1a00271 ror r0, r1, r2
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