From 0f25d5e3f49a7108aa8e86a5f5b76597f352637a Mon Sep 17 00:00:00 2001
From: Christian Gmeiner <cgmeiner@igalia.com>
Date: Sat, 14 Jun 2025 07:14:04 +0200
Subject: [PATCH] etnaviv: isa: Add texldgpcf instruction

Implement support for the texldgpcf instruction, which handles texture
gradient sampling with shadow comparison.

Blob generates such txf's for
dEQP-GLES3.functional.shaders.texture_functions.texturegrad.*shadow*

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35531>
---
 src/etnaviv/isa/etnaviv.xml      |  5 +++++
 src/etnaviv/isa/tests/disasm.cpp | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/src/etnaviv/isa/etnaviv.xml b/src/etnaviv/isa/etnaviv.xml
index 42f551238bf..b55340ba910 100644
--- a/src/etnaviv/isa/etnaviv.xml
+++ b/src/etnaviv/isa/etnaviv.xml
@@ -1491,6 +1491,11 @@ SPDX-License-Identifier: MIT
 	<pattern pos="80">1</pattern> <!-- OPCODE_BIT6 -->
 </bitset>
 
+<bitset name="texldgpcf" extends="#instruction-tex-src0-src1-src2">
+	<pattern low="0" high="5">110000</pattern> <!-- OPC -->
+	<pattern pos="80">1</pattern> <!-- OPCODE_BIT6 -->
+</bitset>
+
 <bitset name="conv" extends="#instruction-alu-src0-src1">
 	<pattern low="0" high="5">110010</pattern> <!-- OPC -->
 	<pattern pos="80">1</pattern> <!-- OPCODE_BIT6 -->
diff --git a/src/etnaviv/isa/tests/disasm.cpp b/src/etnaviv/isa/tests/disasm.cpp
index 3d4ebec8a49..eb11fb70a9b 100644
--- a/src/etnaviv/isa/tests/disasm.cpp
+++ b/src/etnaviv/isa/tests/disasm.cpp
@@ -352,6 +352,17 @@ INSTANTIATE_TEST_SUITE_P(texldlpcf, DisasmTest,
 );
 // clang-format on
 
+// clang-format off
+INSTANTIATE_TEST_SUITE_P(texldgpcf, DisasmTest,
+   testing::Values(
+      // taken from dEQP-GLES3.functional.shaders.texture_functions.texturegrad.sampler2dshadow_fragment (GC7000)
+      disasm_state{ {0x04011809, 0x00000004, 0x00000000, 0x003fc018}, "mov.sat           t1.___w, void, void, t1.wwww\n"},
+      disasm_state{ {0x00811030, 0x39001800, 0x01490140, 0x00290038}, "texldgpcf         t1.x___, tex0.xxxx, t1.xyzw, t2.xyzz, t3.xyzz\n"},
+      disasm_state{ {0x07011009, 0x00000004, 0x00000000, 0x20390018}, "mov               t1._yzw, void, void, u1.xyzw\n"}
+   )
+);
+// clang-format on
+
 // clang-format off
 INSTANTIATE_TEST_SUITE_P(LoadStoreVariants, DisasmTest,
    testing::Values(