On Thu, 8 Sep 2022, Kwok Cheung Yeung wrote:
> The sin and cos instructions for some reason are scaled by 2*PI radians (i.e.
> 1.0 == 2*PI radians/360 degrees), so their inputs need to be scaled by
> 1/(2*PI) first. I've implemented this as an expander to two instructions - one
C2x has sinpi and
On 09/09/2022 13:20, Tobias Burnus wrote:
However, the pre-existing 'sqrt' problem still is real. It also applies
to reverse sqrt ("v_rsq"), but that's for whatever reason not used for GCN.
This patch now adds a commandline flag - off by default - to choose
whether this behavior is wanted. I
> -Original Message-
> I agree - for example powerpc has -mrecip= to control which instructions
> to use (float/double rsqrt or inverse) and -mrecip-precision to
> specify whether further iteration is done or not.
>
> x86 has similar but does always perform newton raphson iteration,
>
On 09.09.22 12:16, Richard Biener wrote:
On Fri, 9 Sep 2022, Tobias Burnus wrote:
-funsafe-math-optimizations implies -fno-signed-zeros, -fno-trapping-math,
-fassociative-math,
and -freciprocal-math. All of them reduce precision and my violate IEEE or
ISO/language standards.
However, I think
On Fri, 9 Sep 2022, Tobias Burnus wrote:
> On 09.09.22 10:10, Andrew Stubbs wrote:
> On 08.09.22 22:38, Kwok Cheung Yeung wrote:
> The instructions for the transcendental functions are documented to have
> limited numerical precision, so they are only used if
> unsafe_math_optimizations are
On 09.09.22 10:10, Andrew Stubbs wrote:
On 08.09.22 22:38, Kwok Cheung Yeung wrote:
The instructions for the transcendental functions are documented to have
limited numerical precision, so they are only used if unsafe_math_optimizations
are enabled for now.
-funsafe-math-optimizations implies
On 08/09/2022 21:38, Kwok Cheung Yeung wrote:
Hello
This patch adds support for some additional floating-point operations,
in scalar and vector modes, which are natively supported by the AMD GCN
instruction set, but haven't been implemented in GCC yet. With the
exception of frexp, these
2001
From: Kwok Cheung Yeung
Date: Thu, 8 Sep 2022 17:37:26 +
Subject: [PATCH] amdgcn: Add support for additional natively supported
floating-point operations
This adds support for the following natively supported floating-point
operations, in scalar and vectorized modes:
floor, ceil, exp2
