libgcc2 provides "double-word" division as __udivmoddi4()
The following part of its source
| UWtype d0, d1, n0, n1, n2;
| UWtype b, bm;
...
| count_leading_zeros (bm, d1);
| if (bm == 0)
...
| else
| {
| UWtype m1, m0;
| /* Normalize. */
|
| b = W_TYPE_SIZE - bm;
Hi,
I'm new to contributing to GCC, so I looked for issues in Bugzilla with the
keyword "easyhack" that looked comprehensible to me, and found bug 53920: "'gcc
-E' does not honor #pragma GCC diagnostic ignored '-Wunused-macro'". I
verified using a fresh build of gcc from the master branch that whe
Snapshot gcc-11-20200913 is now available on
https://gcc.gnu.org/pub/gcc/snapshots/11-20200913/
and on various mirrors, see http://gcc.gnu.org/mirrors.html for details.
This snapshot has been generated from the GCC 11 git branch
with the following options: git://gcc.gnu.org/git/gcc.git branch
hi, one of my work need to instrument a memset function (since the memset are
inserted after pass_expand). I find inserting a function before memset directly
will lead to segment fault. I think the inserted funtion destroy memset funtion
arguments. I put the inserted funtion after memset, run ok
> -Original Message-
> From: Richard Earnshaw
> Sent: Friday, September 11, 2020 9:30 PM
> To: Qian, Jianhua/钱 建华 ; gcc@gcc.gnu.org
> Subject: Re: A problem with one instruction multiple latencies and pipelines
>
> On 07/09/2020 07:08, Qian, Jianhua wrote:
> > Hi
> >
> > I'm adding a new
Hi Richard and Segher
I don't know if I exactly understood your discussion.
If I misunderstood, please let me know.
I am trying to test these two cases.
Case 1. keep the TYPE attribute unchanged, add new attributes
It works well as below.
(define_attr "shift_imm_value"
"shift_imm_none,sh
