On Tue, 11 May 2010, Revital1 Eres wrote:
>
> Hello,
>
> I have a question regarding the process of bundling and NOPs insertion for
> VLIW architecture
> and I appreciate your answer:
>
> I am calling the second scheduler from the machine reorg pass; similar to
>
Hello,
I have a question regarding the process of bundling and NOPs insertion for
VLIW architecture
and I appreciate your answer:
I am calling the second scheduler from the machine reorg pass; similar to
what is done for IA64.
I now want to handle the bundling and NOPs insertion for VLIW
> From: Andrew Pinski
> To: Jamie Prescott
> Cc: Ian Lance Taylor ; gcc@gcc.gnu.org
> Sent: Thursday, May 21, 2009 8:22:00 AM
> Subject: Re: nops
>
> On Thu, May 21, 2009 at 8:13 AM, Jamie Prescott wrote:
> > My target does not have anything special WRT alignment.
On Thu, May 21, 2009 at 8:13 AM, Jamie Prescott wrote:
> My target does not have anything special WRT alignment. I even set the
> function
> alignment to 8, and it still issues gen_nop().
> This seem to happen only with -O0, or at least I noticed it only under such
> condition
> so far.
so it h
- Original Message
> From: Ian Lance Taylor
> To: Jamie Prescott
> Cc: gcc@gcc.gnu.org
> Sent: Wednesday, May 20, 2009 9:50:50 PM
> Subject: Re: nops
>
> Jamie Prescott writes:
>
> > Under which conditions GCC generates nops?
>
> It depends entir
Jamie Prescott writes:
> Under which conditions GCC generates nops?
It depends entirely on the target. For many targets, gcc will never
generate a nop instruction, except as a byproduct of alignment.
> I noticed that with 4.4.0, gen_nop() is required, thing that wasn't with
>
Under which conditions GCC generates nops?
I noticed that with 4.4.0, gen_nop() is required, thing that wasn't with 4.3.3.
Can I just define an empty insn for nop, of GCC requires a one-byte insn for its
own alignment purposes?
- Jamie
\
> && (TYPE_MODE (TREE_TYPE (EXP))\
> == TYPE_MODE (TREE_TYPE (TREE_OPERAND (EXP, 0) \
>(EXP) = TREE_OPERAND (EXP, 0)
>
You are confusing macros at different times in the compiler .
STRIP_NOPS happens at the tree level whilst scheduling happens on RTL
. This isn&#
_OPERAND (EXP, 0)
I am currently having a VLIW architecture and I want to put NOPs between
the dependent instructions... So if I disable this #define, then will it
do the trick? Can someone please explain to me ohw this works?
Any help is greatly appreciated!
Please CC me in your response
Hello all,
For the big endian 16bit target that i am porting to gcc 4.1.2 a nop
is needed after a load instruction if the destination register of the
load instruction is used as the source in the next instruction. So
load R0, R3[2]
add R2, R0
needs a nop inserted in between the instructions. I h
"Ling-hua Tseng" <[EMAIL PROTECTED]> writes:
> Because I need to use the feature of `length' attribute (i.e., use
> get_attr_length() in machine description),
> I have to insert NOPs explicitly before performing the pass 58
> (shorten) such that the shorten pass
Sorry.
The example of previous post was wrong.
I just corrected it in this post.
I'm porting GCC 4.1.1 to a VLIW processor.
The processor couldn't solve any hazards itself so we should insert explicit
NOPs after insn scheduling.
I have implemented this functionality i
I'm porting GCC 4.1.1 to a VLIW processor.
The processor couldn't solve any hazards itself so we should insert explicit
NOPs after insn scheduling.
I have implemented this functionality in the hook
`TARGET_MACHINE_DEPENDENT_REORG' (pass 52: mach).
Then I noticed that the pass 5
Balaji V. Iyer wrote:
I am porting GCC 4.0.0 to a proprietary VLIW machine, and I want to
insert NOPs explicitly wherever there is an Output/Flow/Anti dependencies. I
am currently doing this insertion in the machine dependent reorganization
phase. Is there a way to do this in machine
Hi Everyone,
I am porting GCC 4.0.0 to a proprietary VLIW machine, and I want to
insert NOPs explicitly wherever there is an Output/Flow/Anti dependencies. I
am currently doing this insertion in the machine dependent reorganization
phase. Is there a way to do this in machine description file
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