On 06/23/2014 09:24 PM, Paul Burton wrote:
> On Mon, Jun 23, 2014 at 10:38:59AM +0100, Markos Chandras wrote:
>> diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c
>> index 4920e0fd05ee..d8dba7b523a5 100644
>> --- a/arch/mips/net/bpf_jit.c
>> +++ b/arch/mips/net/bpf_jit.c
>> @@ -447,6 +447,17 @@ static inline void emit_wsbh(unsigned int dst, unsigned int src,
>> emit_instr(ctx, wsbh, dst, src);
>> }
>>
>> +/* load address to register */
>> +static inline void emit_load_addr(unsigned int dst, unsigned int src,
>> + int imm, struct jit_ctx *ctx)
>
> (I originally sent this in reply to your internal posting, but assume you
> missed it or it got eaten somewhere along the way.)
>
> The name emit_load_addr & comment "load address to register" makes this
> sound like an equivalent of the "la" pseudo instruction, but it appears
> to really emit a pointer sized load? How about emit_load_ptr or something
> instead, and similarly s/address/pointer/ in the comment?
>
Hi Paul,
I suppose I could do that. I will send a v2
>> +{
>> + /* src contains the base addr of the 32/64-pointer */
>> + if (config_enabled(CONFIG_64BIT))
>> + emit_instr(ctx, ld, dst, imm, src);
>> + else
>> + emit_instr(ctx, lw, dst, imm, src);
>
> Is there some way you could make use of the UASM_i_LW macro (note the
> capitalisation) instead of the if statement here?
>
Not right now. I use config_enabled(CONFIG_64BIT) everywhere in that
file to emit 32-bit or 64-bit instructions. So I will look into
switching to the USAM_i_* macros when i submit the remaining fixes
probably for 3.17.
--
markos
