Messages in this thread | | | Date | Mon, 14 Oct 2013 17:41:34 +0100 | From | Will Deacon <> | Subject | Re: [PATCH v2 0/7] Optimize jump label implementation on ARM64 |
| |
On Mon, Oct 14, 2013 at 05:04:20PM +0100, Russell King - ARM Linux wrote: > > On 10/14/2013 11:40 PM, Russell King - ARM Linux wrote: > | In the simplest case, a `%' followed by a digit N says to output > | operand N at that point in the string. > | > | `%' followed by a letter and a digit says to output an operand in an > | alternate fashion. Four letters have standard, built-in meanings > | described below. The machine description macro `PRINT_OPERAND' can > | define additional letters with nonstandard meanings. > | > | `%cDIGIT' can be used to substitute an operand that is a constant > | value without the syntax that normally indicates an immediate operand. > | ... > | `%lDIGIT' is used to substitute a `label_ref' into a jump instruction. > > %lDIGIT is used (but not commented upon) in the gcc extended asm > documentation where it talks about asm gotos, so there's probably a doc > bug here too about whether these options should be described in the > main doc as well. > > Nevertheness, this section is documenting the _internals_ of gcc, and > it seems perverse for a gcc backend to ignore something that is > documented as being a standard part of gcc.
I'll make sure this gets fixed.
Will
| |