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Re: GAS bug when dividing constants
On Sun, 2009-03-29 at 18:20 -0700, H.J. Lu wrote:
> On Sun, Mar 29, 2009 at 6:07 PM, Bogdan <love4boobies@yahoo.com> wrote:
> >
> > This works
> >
> > MOV 2 + 2, %AX
> >
> > while this fails
> >
> > MOV 2 / 2, %AX
> >
> > Probably an easy-to-fix preprocessor bug.
> >
> > Cheers.
>
> Works for me:
>
>
> bash-3.2$ cat x.s
> MOV 2 / 2, %AX
> bash-3.2$ gcc -c x.s
> bash-3.2$ objdump -dw x.o
>
> x.o: file format elf64-x86-64
>
>
> Disassembly of section .text:
>
> 0000000000000000 <.text>:
> 0: 66 8b 04 25 01 00 00 00 mov 0x1,%ax
> bash-3.2$
>
>
And for me:
GAS LISTING gas_const.s page 1
1 .text
2 .globl main
3 0000 55 main: pushq %rbp
4 0001 4889E5 movq %rsp, %rbp
5
6 0004 668B0425 mov 2 + 2, %ax
6 04000000
7 000c 668B0425 mov 2 / 2, %ax
7 01000000
8 0014 668B0425 mov 1, %ax
8 01000000
9
10 001c B8000000 movl $0, %eax
10 00
11 0021 4889EC movq %rbp, %rsp
12 0024 5D popq %rbp
13 0025 C3 ret
14