> Hello.
> I have already sent a patch for expanding roundeven for i386 with
> relevant doubts. I also was regression testing with
> make -k check
> after successful bootstrap build with reverting my patches. Turns out
> do-check fails without any patches applied, Is it ok to do anyways for
> appli
Hello.
I have already sent a patch for expanding roundeven for i386 with
relevant doubts. I also was regression testing with
make -k check
after successful bootstrap build with reverting my patches. Turns out
do-check fails without any patches applied, Is it ok to do anyways for
applied patch? Also
Hello.
I have made following changes to inspect inlining of roundeven with
the following test code:
double
plusone (double d)
{
return __builtin_roundeven (d) + 1;
}
Running the program using -O2 foo.c gave internal compiler error which
I believe is because gcc_unreachable() at:
if (TARGET_SS
On Mon, 17 Jun 2019, Tejas Joshi wrote:
> > existing ROUND_NO_EXC definition in GCC. A new definition will need
> > adding alongside ROUND_FLOOR, ROUND_CEIL and ROUND_TRUNC to correspond to
> > rounding to nearest with ties to even, evaluating to 0.)
>
> So (ROUND_ROUNDEVEN 0x0) be declared fo
On Fri, 14 Jun 2019, Martin Jambor wrote:
> Make sure you compile to a target that has the rounding instruction,
> i.e. by using an appropriate -march or -mavx) and also specify
> -ffast-math on the command line. I have not double checked, but I
> assume the latter is necessary (mainly) because i
Hello.
Looking at machine description of functions like ceil/floor and I
think specifically:
(define_expand "2"
Roundeven should be described as define_expand (or within this
alongside ceil and floor?) with expand functions to emit instructions
in i386-builtins.c?
Referring to ,
operands of these
Hi,
On Fri, Jun 14 2019, Tejas Joshi wrote:
>> Of course the instruction is not present there, that is the next step in
>> your project :-)
>
> Yes, of course, but what I meant was that instructions for existing
> round/ceil functions and not roundeven. If inlining for these
> functions is availab
> Of course the instruction is not present there, that is the next step in
> your project :-)
Yes, of course, but what I meant was that instructions for existing
round/ceil functions and not roundeven. If inlining for these
functions is available, how can I inspect such instructions getting
inline
On Thu, 13 Jun 2019, Martin Jambor wrote:
> architecture supports it. (and if IIUC, the intent is to use the 0 mode
> from table 4-8 in
> https://software.intel.com/sites/default/files/managed/39/c5/325462-sdm-vol-1-2abcd-3abcd.pdf
> in instructions that take a rounding a mode to implement rounde
Hi Tejas,
On Thu, Jun 13 2019, Tejas Joshi wrote:
> Hello.
> As further part of implementing roundeven is inlining, I was studying
> machine descriptions and I have a few questions.
>
> As suggested, builtin functions provided a strong model for
> implementing roundeven. Keeping that in mind, I tr
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