commit 661123bb19d4f17c895a3fe166b3f87ddb2191eb
author Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Fri Aug 28 08:53:44 2020 -0400
committer Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Mon Aug 31 07:46:32 2020 -0400
tree c169eab0915fe1cf16e5fa6c89d8dd6178aff841
parent f6e19dd3f45de7bc9edfe0aa9254abc3412c2610

pan/mdg: Add disassembly for shadow gathers

By applying `textureGather` to a `sampler2DShadow`, the blob produces
(under the old disassembly):

   tex_22.vtx.2d.shadow.cont.last r29, texture0, fsampler0.zwyx, r29,

The op 0x22 is 10|0010 in binary, the old shadow parameter is 1, and old
gather parameter is 0, so we get 0110|0010 in binary, or an op of
textureLod with a mod of 0110 = 6.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6516>

src/panfrost/midgard/disassemble.c

diff --git a/src/panfrost/midgard/disassemble.c b/src/panfrost/midgard/disassemble.c
index 5568fa0..e872ea9 100644
--- a/src/panfrost/midgard/disassemble.c
+++ b/src/panfrost/midgard/disassemble.c
@@ -1385,6 +1385,7 @@
         switch (mode) {
         case TEXTURE_NORMAL: return "";
         case TEXTURE_SHADOW: return ".shadow";
+        case TEXTURE_GATHER_SHADOW: return ".gather.shadow";
         case TEXTURE_GATHER_X: return ".gatherX";
         case TEXTURE_GATHER_Y: return ".gatherY";
         case TEXTURE_GATHER_Z: return ".gatherZ";

src/panfrost/midgard/midgard.h

diff --git a/src/panfrost/midgard/midgard.h b/src/panfrost/midgard/midgard.h
index 6308e89..656881c 100644
--- a/src/panfrost/midgard/midgard.h
+++ b/src/panfrost/midgard/midgard.h
@@ -651,6 +651,7 @@
 enum mali_texture_mode {
         TEXTURE_NORMAL = 1,
         TEXTURE_SHADOW = 5,
+        TEXTURE_GATHER_SHADOW = 6,
         TEXTURE_GATHER_X = 8,
         TEXTURE_GATHER_Y = 9,
         TEXTURE_GATHER_Z = 10,