llvm dev - Feb 2014 - [LLVMdev] emitting function stub for mips16 floating point patch

How is alignment set?


On 02/04/2014 08:48 AM, Rafael Espíndola wrote:
> On 31 January 2014 18:59, reed kotler <rkotler at mips.com> wrote:
>> I'm rewriting this patch for the stubs to not use outputing of raw
text.
>>
>> Generating the instructions is very straightforward and that part is
done.
> awesome!
>
>> I'm translating the actual function now.
>>
>> How do you emit an .ent
> emitDirectiveEnt in the mips target streamer.
>
>> or .globl
> EmitSymbolAttribute with MCSA_Global
>
>> from asm printer?
>> .type ?
> EmitSymbolAttribute with  MCSA_ELF_Type*
>
>> .end ??
> emitDirectiveEnd on the mips target streamer
>
>> .section ???
> SwitchSection
>
>> I'm studying the classes now but it should be simple to do so if
you know,
>> you can save me some time
>> because this is another maze of llvm data abstraction.
> The rule of the thumb is that each line in assembly is a method in the
> streamer or target streamer.
>
>> Tia.
>>
>> Reed
> Cheers,
> Rafael

On 4 February 2014 12:37, reed kotler <rkotler at mips.com>
wrote:
> How is alignment set?
Of a symbol? EmitValueToAlignment.

A tip on how to find this is to look at what clang prints
(".align...") and grep for it "git grep '\.align'").

Cheers,
Rafael

On 02/04/2014 09:49 AM, Rafael Espíndola wrote:
> On 4 February 2014 12:37, reed kotler <rkotler at mips.com> wrote:
>> How is alignment set?
> Of a symbol? EmitValueToAlignment.
>
> A tip on how to find this is to look at what clang prints
> (".align...") and grep for it "git grep
'\.align'").
>
> Cheers,
> Rafael
Not on a symbol but in a section to set the current value.

I have not found it so far but am looking where this can be in 
AsmPrinter or MC.

I have these statements left to translate.

Most we already discussed.

.align 2

the .nomips16 and .nomicromips we have it in mipsTargetStreamer (which 
to me seems
little different from emit raw text).

I think you mentioned already how to do the .size

   OutStreamer.EmitRawText(".align 2");
   OutStreamer.EmitRawText(".nomips16");
   OutStreamer.EmitRawText(".nomicromips");
   OutStreamer.EmitRawText("\t.ent\t__call_stub_fp_" + Twine(Symbol));
   OutStreamer.EmitRawText("\t.type\t__call_stub_fp_" + Twine(Symbol)
+
", @function");
   OutStreamer.EmitRawText("\t__call_stub_fp_" + Twine(Symbol) +
":");
   OutStreamer.EmitRawText("\t.size  __call_stub_fp_" + Twine(Symbol)
+
                           ", .-__call_stub_fp_" + Twine(Symbol));
   OutStreamer.EmitRawText("\t.end  __call_stub_fp_" + Twine(Symbol));