From: Eric Anholt <eric@anholt.net>
Date: Mon, 16 Jul 2018 19:35:11 +0000 (-0700)
Subject: v3d: Apply GFXH-1625 restriction on TMUWT in the end of the shader.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d661d78464aec0af7d6976512eca155623cbecc2;p=mesa.git

v3d: Apply GFXH-1625 restriction on TMUWT in the end of the shader.

This doesn't affect us yet since we're not doing TMUWTs, but I think we
will for GLES 3.1.
---

diff --git a/src/broadcom/compiler/qpu_schedule.c b/src/broadcom/compiler/qpu_schedule.c
index b404390a799..a2260f8b2a7 100644
--- a/src/broadcom/compiler/qpu_schedule.c
+++ b/src/broadcom/compiler/qpu_schedule.c
@@ -1073,6 +1073,10 @@ qpu_instruction_valid_in_thrend_slot(struct v3d_compile *c,
                 return false;
 
         if (inst->type == V3D_QPU_INSTR_TYPE_ALU) {
+                /* GFXH-1625: TMUWT not allowed in the final instruction. */
+                if (slot == 2 && inst->alu.add.op == V3D_QPU_A_TMUWT)
+                        return false;
+
                 /* No writing physical registers at the end. */
                 if (!inst->alu.add.magic_write ||
                     !inst->alu.mul.magic_write) {