https://sourceware.org/bugzilla/show_bug.cgi?id=25167
Bug ID: 25167
Summary: The .code16 directive is broken
Product: binutils
Version: 2.34 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: hjl.tools at gmail dot com
Target Milestone: ---
Target: i386
commit d241b91073165f99fe404d9b38c65f03835ecaf4
Author: Jan Beulich <jbeul...@suse.com>
Date: Mon Oct 7 08:38:01 2019 +0200
x86/Intel: correct MOVSD and CMPSD handling
caused:
[hjl@gnu-skx-1 build-x86_64-linux]$ cat x.s
.code16
rep; movsd
[hjl@gnu-skx-1 build-x86_64-linux]$ ./gas/as-new --32 -o x.o x.s
[hjl@gnu-skx-1 build-x86_64-linux]$ objdump -dw -Mi8086 x.o
x.o: file format elf32-i386
Disassembly of section .text:
00000000 <.text>:
0: f3 a5 rep movsw %ds:(%si),%es:(%di)
This should be movsl.
[hjl@gnu-skx-1 build-x86_64-linux]$
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