From: Ilia Mirkin <imirkin@alum.mit.edu>
Date: Sun, 20 Mar 2016 21:26:13 +0000 (-0400)
Subject: nvc0/ir: fix picking of coordinates from tex instruction for textureGrad
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=f667d15561820ee9dd8e836d43cce3ee52a4780e;p=mesa.git

nvc0/ir: fix picking of coordinates from tex instruction for textureGrad

On Fermi, there's an argument in front of the coords that combines array
and indirect handle, while on Kepler the array and the indirect handle
are separate (and in front of the coords). We were previously only
accounting for the array bit of it, if there were an indirect access it
wouldn't be counted in the formula.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>
---

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
index e8f8e30918b..122a6b74279 100644
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_lowering_nvc0.cpp
@@ -874,7 +874,17 @@ NVC0LoweringPass::handleManualTXD(TexInstruction *i)
    Value *zero = bld.loadImm(bld.getSSA(), 0);
    int l, c;
    const int dim = i->tex.target.getDim() + i->tex.target.isCube();
-   const int array = i->tex.target.isArray();
+
+   // This function is invoked after handleTEX lowering, so we have to expect
+   // the arguments in the order that the hw wants them. For Fermi, array and
+   // indirect are both in the leading arg, while for Kepler, array and
+   // indirect are separate (and both precede the coordinates). Maxwell is
+   // handled in a separate function.
+   unsigned array;
+   if (targ->getChipset() < NVISA_GK104_CHIPSET)
+      array = i->tex.target.isArray() || i->tex.rIndirectSrc >= 0;
+   else
+      array = i->tex.target.isArray() + (i->tex.rIndirectSrc >= 0);
 
    i->op = OP_TEX; // no need to clone dPdx/dPdy later