On Tue, Nov 17, 2020 at 6:10 PM Jordan Justen wrote:
>
> On 2020-11-17 16:03:31, Brian Paul wrote:
> > Another Intel question: It looks like gen11/gen12 don't have fp/int64
> > enabled in the Vulkan driver. From gen_device_info.c:
> >
> > #define GEN11_FEATURES(_gt, _slices, _subslices, _l3) \
>
On 2020-11-17 16:03:31, Brian Paul wrote:
> Another Intel question: It looks like gen11/gen12 don't have fp/int64
> enabled in the Vulkan driver. From gen_device_info.c:
>
> #define GEN11_FEATURES(_gt, _slices, _subslices, _l3) \
> GEN8_FEATURES, \
>
Another Intel question: It looks like gen11/gen12 don't have fp/int64
enabled in the Vulkan driver. From gen_device_info.c:
#define GEN11_FEATURES(_gt, _slices, _subslices, _l3) \
GEN8_FEATURES, \
GEN11_HW_INFO, \
On 11/17/2020 11:45 AM, Ian Romanick wrote:
On 11/17/20 9:25 AM, Brian Paul wrote:
It appears these SPIR-V extension functions don't behave as they should
on Intel (don't know about other Vulkan drivers).
They're supposed to be NaN-aware such that if one argument is NaN, the
other argument is
On 11/17/2020 11:49 AM, Ian Romanick wrote:
On 11/17/20 9:25 AM, Brian Paul wrote:
Using the Intel Vulkan driver, we've found some cases where SpvOpSelect
is returning -0.0 (negative zeros) instead of normal 0.0 depending on
the arguments.
Do you have a specific test case that fails?
Yeah,
On 11/17/20 9:25 AM, Brian Paul wrote:
>
> Using the Intel Vulkan driver, we've found some cases where SpvOpSelect
> is returning -0.0 (negative zeros) instead of normal 0.0 depending on
> the arguments.
Do you have a specific test case that fails?
It seems like on some platforms there was an
On 11/17/20 9:25 AM, Brian Paul wrote:
>
> It appears these SPIR-V extension functions don't behave as they should
> on Intel (don't know about other Vulkan drivers).
>
> They're supposed to be NaN-aware such that if one argument is NaN, the
> other argument is returned. From our testing, it
Brian,
There are some NaN related fixes by Ian soon to be merged in
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6358. Could you check
if the MR helps this and the Select issue?
Thanks,
Caio
From: mesa-dev on behalf of Brian Paul
Sent:
Using the Intel Vulkan driver, we've found some cases where SpvOpSelect
is returning -0.0 (negative zeros) instead of normal 0.0 depending on
the arguments.
I'm wondering if "SpvOpSelect x, a, b" for floats is being implemented
with something like "a*x + b*(1-x)" ? That might explain
It appears these SPIR-V extension functions don't behave as they should
on Intel (don't know about other Vulkan drivers).
They're supposed to be NaN-aware such that if one argument is NaN, the
other argument is returned. From our testing, it looks like NMax works
as expected, but not NMin
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