From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 0/7] Optimize jump label implementation on ARM64
Date: Mon, 14 Oct 2013 17:41:34 +0100 [thread overview]
Message-ID: <20131014164134.GP10491@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <20131014160419.GS25034@n2100.arm.linux.org.uk>
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
prev parent reply other threads:[~2013-10-14 16:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-13 14:50 [PATCH v2 0/7] Optimize jump label implementation on ARM64 Jiang Liu
2013-10-13 14:50 ` [PATCH v2 1/7] arm64: introduce basic aarch64 instruction decoding helpers Jiang Liu
2013-10-13 14:50 ` [PATCH v2 2/7] arm64: introduce interfaces to hotpatch kernel and module code Jiang Liu
2013-10-13 14:50 ` [PATCH v2 3/7] arm64: move encode_insn_immediate() from module.c to insn.c Jiang Liu
2013-10-13 14:50 ` [PATCH v2 4/7] arm64: introduce aarch64_insn_gen_{nop|branch_imm}() helper functions Jiang Liu
2013-10-14 14:24 ` [PATCH] " Jiang Liu
2013-10-13 14:50 ` [PATCH v2 5/7] arm64, jump label: detect %c support for ARM64 Jiang Liu
2013-10-13 14:50 ` [PATCH v2 6/7] arm64, jump label: optimize jump label implementation Jiang Liu
2013-10-13 14:50 ` [PATCH v2 7/7] jump_label: use defined macros instead of hard-coding for better readability Jiang Liu
2013-10-14 15:19 ` [PATCH v2 0/7] Optimize jump label implementation on ARM64 Will Deacon
2013-10-14 15:24 ` Jiang Liu
2013-10-14 15:40 ` Russell King - ARM Linux
2013-10-14 15:57 ` Jiang Liu
2013-10-14 16:04 ` Russell King - ARM Linux
2013-10-14 16:41 ` Will Deacon [this message]
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