https://sourceware.org/bugzilla/show_bug.cgi?id=19556
Bug ID: 19556
Summary: GNURX toolchain generates incorrect opcode for "mov.b
#0xff, [r0]" instruction.
Product: binutils
Version: 2.25
Status: NEW
Severity: critical
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: vinay.g at kpit dot com
Target Milestone: ---
As per mailing list link :
https://sourceware.org/ml/binutils/2015-09/msg00095.html
/*testcase*/
/*test.s*/
mov.b #0xff, [r0]
mov.b #0xff, 0[r0]
mov.b #0xff, 1[r0]
mov.b #0xff, 2[r0]
mov.b #0xff, 3[r0]
mov.b #0xff, 4[r0]
mov.b #0xff, 5[r0]
$rx-elf-as test.s -o test.o -aln=test.lst
$rx-elf-objdump -d test.o > test.o.dis
$cat test.lst
1 0000 3C 00 FF mov.b #0xff, [r0] --> Should be "F8 04 FF mov.b #0xff,
[r0]"
2 0003 3C 00 FF mov.b #0xff, 0[r0]
3 0006 3C 01 FF mov.b #0xff, 1[r0]
4 0009 3C 02 FF mov.b #0xff, 2[r0]
5 000c 3C 03 FF mov.b #0xff, 3[r0]
6 000f 3C 04 FF mov.b #0xff, 4[r0]
7 0012 3C 05 FF mov.b #0xff, 5[r0]
The above testcase generates expected opcode with attched patch
"mov_imm_1388.patch".
$cat test.o.dis
test.o: file format elf32-rx-le
Disassembly of section P:
00000000 <P>:
0: 3c 00 ff mov.b #255, [r0] --> Should be "F8 04 FF mov.b #255,
[r0]"
3: 3c 00 ff mov.b #255, [r0]
6: 3c 01 ff mov.b #255, 1[r0]
9: 3c 02 ff mov.b #255, 2[r0]
c: 3c 03 ff mov.b #255, 3[r0]
f: 3c 04 ff mov.b #255, 4[r0]
12: 3c 05 ff mov.b #255, 5[r0]
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