Bingfeng Mei wrote:
> Hello,
> Could anyone explain to me what is difference between
> vec_shl_ and ashl3 patterns? It seems to me
> that both shift a vector operand 1 with scalar operand 2. I tried to
> understand some targets' implemenation, e.g., ia64 as follows, and
"Bingfeng Mei" writes:
> Thanks for prompt reply. Just out of curiosity. Isn't this naming
> convention for shift instructions inconsistent with other patterns?
> For example, we can define add3 and GCC will
> automatically use it by vectorization or in plus expression of two
> vector types. Why
ecial names?
Bingfeng
> -Original Message-
> From: Ian Lance Taylor [mailto:i...@google.com]
> Sent: 10 February 2009 14:31
> To: Bingfeng Mei
> Cc: gcc@gcc.gnu.org
> Subject: Re: Difference between vec_shl_ and
> ashl3
>
> "Bingfeng Mei" writes:
"Bingfeng Mei" writes:
> Could anyone explain to me what is difference between
> vec_shl_ and ashl3 patterns? It seems to me
> that both shift a vector operand 1 with scalar operand 2.
The difference is that with a vector mode gcc will look for the standard
name vec_shl_M
Hello,
Could anyone explain to me what is difference between vec_shl_ and
ashl3 patterns? It seems to me that both shift a vector operand 1
with scalar operand 2. I tried to understand some targets' implemenation,
e.g., ia64 as follows, and cannot grasp their difference. Does the &
