: return gen_aarch64_rsqrts_v4sf3;
> -default: gcc_unreachable ();
> +default: gcc_unreachable ();
>}
> }
You'll find these two hunks hit a merge conflict on trunk after Jiong's
recent changes to these pattern names. Just be careful when applying the
patch.
The pat
ccordingly, yes?
+This is only relevant if @option{-ffast-math} enables the square root
+approximation.
+
@item -march=@var{name}
@opindex march
Specify the name of the target architecture and, optionally, one or
Thank you,
--
Evandro Menezes
>From 5c5c07f38cb06507fe997a890dfc5bae
On Fri, May 27, 2016 at 05:57:26PM -0500, Evandro Menezes wrote:
> 2016-04-04 Evandro Menezes
> Wilco Dijkstra
>
> gcc/
> * config/aarch64/aarch64-protos.h
> (aarch64_emit_approx_rsqrt): Replace with new function
> "aarch64_emit_approx_sqrt".
> (cpu_approx_
e results of these approximations are not accurate, I prefer to
let the user decide which of them may be relaxed. Again, I lean towards
the way done for RS6000.
Thank you,
--
Evandro Menezes
>From 42e1a3d1289ba3951d3b9a7fd523422b6c0e56c8 Mon Sep 17 00:00:00 2001
From: Evandro Menezes
Da
On Wed, Apr 27, 2016 at 04:15:45PM -0500, Evandro Menezes wrote:
>gcc/
> * config/aarch64/aarch64-protos.h
> (aarch64_emit_approx_rsqrt): Replace with new function
> "aarch64_emit_approx_sqrt".
> (tune_params): New member "approx_sqrt_modes".
> * config/a
7 00:00:00 2001
From: Evandro Menezes
Date: Mon, 4 Apr 2016 11:23:29 -0500
Subject: [PATCH 2/3] [AArch64] Emit square root using the Newton series
2016-04-04 Evandro Menezes
Wilco Dijkstra
gcc/
* config/aarch64/aarch64-protos.h
(aarch64_emit_approx_rsqrt): Replace w
oices for the reciprocal square root
approximation
[PATCH 2/3 AArch64] Emit square root using the Newton series
[PATCH 3/3 AArch64] Emit division using the Newton series
One patch per email, with the dependencies explicit like this, is
infinitely easier to follow than the current structure of
tch 0/3 AArch64] Add infrastructure for more approximate FP operations
[PATCH 1/3 AArch64] Add more choices for the reciprocal square root
approximation
[PATCH 2/3 AArch64] Emit square root using the Newton series
[PATCH 3/3 AArch64] Emit division using the Newton series
One patch per email,
> On 04/05/16 17:30, Evandro Menezes wrote:
> > On 04/05/16 13:37, Wilco Dijkstra wrote:
> >> I can't get any of these to work... Not only do I get a large number
> >> of collisions and duplicated code between these patches, when I try
> >> to resolve them, all I get is crashes whenever I try to us
On 04/05/16 17:30, Evandro Menezes wrote:
On 04/05/16 13:37, Wilco Dijkstra wrote:
I can't get any of these to work... Not only do I get a large number
of collisions and duplicated
code between these patches, when I try to resolve them, all I get is
crashes whenever I try
to use sqrt (even rsqr
cision-div
+@item -mno-low-precision-div
+@opindex -mlow-precision-div
+@opindex -mno-low-precision-div
+When calculating the division approximation,
+uses one less step than otherwise, thus reducing latency and precision.
+This is only relevant if @option{-ffast-math} enables the division
+approxi
this patch gets close to what all have in mind.
[AArch64] Emit square root using the Newton series
2016-04-04 Evandro Menezes
Wilco Dijkstra
gcc/
* config/aarch64/aarch64-protos.h
(aarch64_emit_approx_rsqrt): Replace with
introduced in it since the first proposal.
[AArch64] Emit square root using the Newton series
2016-03-30 Evandro Menezes
Wilco Dijkstra
gcc/
* config/aarch64/aarch64-protos.h
(aarch64_emit_approx_rsqrt): Replace with new
AArch64] Emit square root using the Newton series
2016-03-23 Evandro Menezes
Wilco Dijkstra
gcc/
* config/aarch64/aarch64-tuning-flags.def
(AARCH64_EXTRA_TUNE_APPROX_SQRT_{SF,DF}): New tuning macros.
* config/aarch64/aarch64-protos.h
(aarch64_emit_approx_rsqrt):
On Wed, Mar 16, 2016 at 02:45:37PM -0500, Evandro Menezes wrote:
> On 03/08/16 16:08, Evandro Menezes wrote:
> >On 02/16/16 14:56, Evandro Menezes wrote:
> >>On 12/08/15 15:35, Evandro Menezes wrote:
> >>>Emit square root using the Newton series
> >&g
On 03/17/16 09:55, James Greenhalgh wrote:
On Wed, Mar 16, 2016 at 02:45:37PM -0500, Evandro Menezes wrote:
On 03/08/16 16:08, Evandro Menezes wrote:
On 02/16/16 14:56, Evandro Menezes wrote:
On 12/08/15 15:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03
bject: [PATCH] Emit square root using the Newton series
2016-03-17 Evandro Menezes
Wilco Dijkstra
gcc/
* config/aarch64/aarch64-tuning-flags.def
(AARCH64_EXTRA_TUNE_APPROX_SQRT_{SF,DF}): New tuning macros.
* config/aarch64/aarch64-protos.h
(aarch64_emit_approx_rsqrt):
On 03/08/16 16:08, Evandro Menezes wrote:
On 02/16/16 14:56, Evandro Menezes wrote:
On 12/08/15 15:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
according to exynos-1.md the
above takes 44 cycles while my version would be 37.
Emit square root using the Newton series
2016-03-16 Evandro Menezes
Wilco Dijkstra
gcc/
* config/aarch64/aarch64-tuning
Evandro Menezes wrote:
>
> I got the scalar version going, but I'm stuck with the vector version.
> As you can see above, I need to use the complement of the mask produced
> by FCMEQ to squelch the offending vector element. However, the way in
> which FCMEQ is defined in GCC, it produces an intege
On 03/10/16 19:06, Wilco Dijkstra wrote:
Evandro Menezes wrote:
That's what I had in mind too, but around the approximation for x^-1/2
and using masks for vector cases thusly:
fcmne v3.4s, v0.4s, #0.0
frsqrte v1.4s, v0.4s
fmulv2.4s, v1.4s, v1.4s
frsqrts
Evandro Menezes wrote:
>
> That's what I had in mind too, but around the approximation for x^-1/2
> and using masks for vector cases thusly:
>
>fcmne v3.4s, v0.4s, #0.0
> frsqrte v1.4s, v0.4s
> fmulv2.4s, v1.4s, v1.4s
> frsqrts v2.4s, v0.4s, v2.4s
> fm
On 03/10/16 13:10, Wilco Dijkstra wrote:
frsqrte s1, s0
fmul s2, s1, s1
frsqrts s2, s0, s2
fcmp s0, 0.0
fmul s1, s1, s2
fmul s2, s1, s1
fmul s1, s0, s1
frsqrts s2, s0, s2
fcsels1, s0, s1, eq
fmul s0, s1, s2
That's
On 03/10/16 10:52, Wilco Dijkstra wrote:
> Hi Evandro,
>
>> I have however encountered precision issues with DF, namely some benchmarks
>> in the SPECfp CPU2000 suite would fail to validate.
> Accuracy is not an issue, the computation is extremely accurate. The issue is
> that your patch doesn't
On 03/10/16 10:52, Wilco Dijkstra wrote:
Hi Evandro,
I have however encountered precision issues with DF, namely some benchmarks in
the SPECfp CPU2000 suite would fail to validate.
Accuracy is not an issue, the computation is extremely accurate. The issue is
that your patch doesn't support s
Hi Evandro,
> I have however encountered precision issues with DF, namely some benchmarks
> in the SPECfp CPU2000 suite would fail to validate.
Accuracy is not an issue, the computation is extremely accurate. The issue is
that your patch doesn't support sqrt(0.0) - it returns NaN rather than z
On 03/08/16 16:08, Evandro Menezes wrote:
On 02/16/16 14:56, Evandro Menezes wrote:
On 12/08/15 15:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
On 03/08/16 16:08, Evandro Menezes wrote:
On 02/16/16 14:56, Evandro Menezes wrote:
On 12/08/15 15:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
On 02/16/16 14:56, Evandro Menezes wrote:
On 12/08/15 15:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
function.
* config
On 02/16/16 14:56, Evandro Menezes wrote:
On 12/08/15 15:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
function.
* config
On 02/26/16 17:42, Evandro Menezes wrote:
On 02/26/16 08:59, James Greenhalgh wrote:
On Mon, Feb 22, 2016 at 06:50:44PM -0600, Evandro Menezes wrote:
In preparation for the patch adding the Newton series also for
square root, I'd like to propose this patch changing the name of the
existing tuni
On 02/26/16 08:59, James Greenhalgh wrote:
On Mon, Feb 22, 2016 at 06:50:44PM -0600, Evandro Menezes wrote:
In preparation for the patch adding the Newton series also for
square root, I'd like to propose this patch changing the name of the
existing tuning flag for the reciprocal square root.
Th
On Mon, Feb 22, 2016 at 06:50:44PM -0600, Evandro Menezes wrote:
> In preparation for the patch adding the Newton series also for
> square root, I'd like to propose this patch changing the name of the
> existing tuning flag for the reciprocal square root.
This is fine, other names like sw_rsqrt, e
, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h
(aarch64_emit_swsqrt):
Declare new
function.
* config/aarch64/aarch64-simd.md (sqrt2): New
expansion and
On 12/08/15 15:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
function.
* config/aarch64/aarch64-simd.md (sqrt2): New
using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
function.
* config/aarch64/aarch64-simd.md (sqrt2): New
expansion and
insn definitions.
* config
On 12/09/2015 11:16 AM, Kyrill Tkachov wrote:
On 09/12/15 17:02, Kyrill Tkachov wrote:
On 09/12/15 16:59, Evandro Menezes wrote:
On 12/09/2015 10:52 AM, Kyrill Tkachov wrote:
Hi Evandro,
On 08/12/15 21:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03
On 09/12/15 17:02, Kyrill Tkachov wrote:
On 09/12/15 16:59, Evandro Menezes wrote:
On 12/09/2015 10:52 AM, Kyrill Tkachov wrote:
Hi Evandro,
On 08/12/15 21:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config
On 09/12/15 16:59, Evandro Menezes wrote:
On 12/09/2015 10:52 AM, Kyrill Tkachov wrote:
Hi Evandro,
On 08/12/15 21:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt
On 12/09/2015 10:52 AM, Kyrill Tkachov wrote:
Hi Evandro,
On 08/12/15 21:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
function
Hi Evandro,
On 08/12/15 21:35, Evandro Menezes wrote:
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
function.
* config/aarch64/aarch64-simd.md (sqrt2
GCC Patches; Marcus Shawcroft; James Greenhalgh; Andrew Pinski; Benedikt
> Huber; philipp.toms...@theobroma-systems.com
> Subject: Re: [AArch64] Emit square root using the Newton series
>
> On 8 December 2015 at 21:35, Evandro Menezes wrote:
> >Emit square root using the Newt
On 8 December 2015 at 21:35, Evandro Menezes wrote:
> Emit square root using the Newton series
>
>2015-12-03 Evandro Menezes
>
>gcc/
> * config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
>Declare new
> function.
>
Emit square root using the Newton series
2015-12-03 Evandro Menezes
gcc/
* config/aarch64/aarch64-protos.h (aarch64_emit_swsqrt):
Declare new
function.
* config/aarch64/aarch64-simd.md (sqrt2): New
expansion and
insn definitions
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