Re: [Qemu-devel] [PATCH 14/15] tcg-mips: Use mipsr6 instructions in branches

[James Hogan]

Hi Richard,

On Tue, Feb 09, 2016 at 04:22:34PM +0000, James Hogan wrote:
> (gdb) disas/r
> Dump of assembler code for function code_gen_buffer:
>    0x000000fff30b0064 <+0>:     f8 ff 11 8e     lw      s1,-8(s0)
> => 0x000000fff30b0068 <+4>:     08 00 11 60     bnezalc s1,0xfff30b008c 
> <code_gen_buffer+40>

Note also that this seems to be the wrong encoding anyway. It is
encoding the "and-link" variation which overwrites $31 with PC+4.

Cheers
James


>    0x000000fff30b006c <+8>:     1d c0 c2 08     j       0xfff30b0074 
> <code_gen_buffer+16>
>    0x000000fff30b0070 <+12>:    00 00 00 00     nop
> 
> (gdb) set *0x000000fff30b006c=0
> (gdb) disas/r
> Dump of assembler code for function code_gen_buffer:
>    0x000000fff30b0064 <+0>:     f8 ff 11 8e     lw      s1,-8(s0)
> => 0x000000fff30b0068 <+4>:     08 00 11 60     bnezalc s1,0xfff30b008c 
> <code_gen_buffer+40>
>    0x000000fff30b006c <+8>:     00 00 00 00     nop
>    0x000000fff30b0070 <+12>:    00 00 00 00     nop

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