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panfrost: Rename VARYING_DISCARD to CONSTANT

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Used for data that does not exist. If used for a load, it is a
zero-components read (so you can use a 0000 or 0001 swizzle) that does
not touch memory. If used as a store, writes are simply discarded.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Tested-by: Christian Hewitt <christianshewitt@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7352>
This commit is contained in:
Alyssa Rosenzweig 2020-10-29 08:50:06 -04:00 • committed by Marge Bot
parent c6bdd976e6
commit 1b5cac4511
2 changed files with 2 additions and 2 deletions
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2
src/gallium/drivers/panfrost/pan_cmdstream.c
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@ -1476,7 +1476,7 @@ static void
pan_emit_vary_only(struct mali_attribute_packed *out,
unsigned present, unsigned quirks)
{
pan_emit_vary(out, present, 0, quirks, MALI_VARYING_DISCARD, 0);
pan_emit_vary(out, present, 0, quirks, MALI_CONSTANT, 0);
}
/* Special records */

2
src/panfrost/lib/midgard.xml
View file

@ -138,7 +138,7 @@
<!--- Format 93 avaible v7+. On Midgard, acts as a RG16F + snap -->
<value name="S8" value="93"/>
<value name="VARYING POS" value="94"/>
<value name="VARYING DISCARD" value="95"/>
<value name="Constant" value="95"/>
<value name="R8 SNORM" value="99"/>
<value name="R16 SNORM" value="100"/>
<value name="R32 SNORM" value="101"/>