On Mon, May 17, 2010 at 11:25 AM, Gilles Chanteperdrix
<[email protected]> wrote:
> Jeremy Brown wrote:
> > {standard input}: Assembler messages:
> > {standard input}:140: Error: selected processor does not support `rsc
> > r7,r7,#0'
> > {standard input}:159: Error: selected processor does not support `rsc
> > r1,r1,#0'
> > make: *** [libxenomai_la-timeconv.lo] Error 1
>
> Ok. Could you try and compile the following piece of code with your
> toolchain and show me the disassembly ?
>
> long long foo(long long x)
> {
> return -x;
> }
>
> --
> Gilles.
Thanks for the quick reply! Here's the complete contents of foo.s:
.syntax unified
.arch armv7-a
.eabi_attribute 27, 3
.fpu vfpv3-d16
.eabi_attribute 20, 1
.eabi_attribute 21, 1
.eabi_attribute 23, 3
.eabi_attribute 24, 1
.eabi_attribute 25, 1
.eabi_attribute 26, 2
.eabi_attribute 30, 6
.eabi_attribute 18, 4
.thumb
.file "foo.c"
.text
.align 2
.global foo
.thumb
.thumb_func
.type foo, %function
foo:
@ args = 0, pretend = 0, frame = 8
@ frame_needed = 1, uses_anonymous_args = 0
@ link register save eliminated.
push {r7}
sub sp, sp, #12
add r7, sp, #0
strd r0, [r7]
ldrd r0, [r7]
negs r2, r0
sbc r3, r1, r1, lsl #1
mov r0, r2
mov r1, r3
add r7, r7, #12
mov sp, r7
pop {r7}
bx lr
.size foo, .-foo
.ident "GCC: (Ubuntu 4.4.3-4ubuntu5) 4.4.3"
.section .note.GNU-stack,"",%progbits
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