[PATCH] x86: Add .nop directive to assembler
H.J. Lu
hjl.tools@gmail.com
Mon Feb 26 20:08:00 GMT 2018
On Mon, Feb 26, 2018 at 11:17 AM, John Darrington
<john@darrington.wattle.id.au> wrote:
> On Mon, Feb 26, 2018 at 11:03:12AM -0800, H.J. Lu wrote:
> On Mon, Feb 26, 2018 at 11:00 AM, John Darrington
> <john@darrington.wattle.id.au> wrote:
> > I haven't read every post in this thread, nor do I pretend to understand all the
> > issues.
> >
> > But it this change seems to have the effect that any instruction called "NOP"
> > in the .s file are completely ignored :(
> >
> > Many cpus have a NOP instruction. It's often used in realtime systems to
> > implement short delays.
>
> Which target have you tried?
>
>
> hcs12z
>
I got
[hjl@gnu-cfl-1 gas]$ cat x.s
nop
[hjl@gnu-cfl-1 gas]$ ./as-new -o x.o x.s -m68hcs12
[hjl@gnu-cfl-1 gas]$ ../binutils/objdump -dw x.o
x.o: file format elf32-m68hc12
Disassembly of section .text:
00000000 <.text>:
0: a7 nop
[hjl@gnu-cfl-1 gas]$
Am I missing something?
--
H.J.
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