Mesa (master): intel/compiler: fix first_component for 64-bit types on vertex inputs

[Iago Toral Quiroga]

Module: Mesa
Branch: master
Commit: 4917d383212b45c946a1311fcaeff6f7ab7b80b1
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=4917d383212b45c946a1311fcaeff6f7ab7b80b1

Author: Iago Toral Quiroga <itoral at igalia.com>
Date:   Fri Jan 19 09:17:06 2018 +0100

intel/compiler: fix first_component for 64-bit types on vertex inputs

Divide it by two as we do for other stages. This is because the
component layout qualifier is always in 32-bit units.

Fixes issues in a new CTS test (still WIP):
KHR-GL45.enhanced_layouts.varying_double_components

Reviewed-by: Samuel Iglesias Gonsálvez <siglesias at igalia.com>

---

 src/intel/compiler/brw_fs_nir.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/intel/compiler/brw_fs_nir.cpp b/src/intel/compiler/brw_fs_nir.cpp
index 0d77564930..7a6346a4b5 100644
--- a/src/intel/compiler/brw_fs_nir.cpp
+++ b/src/intel/compiler/brw_fs_nir.cpp
@@ -2420,6 +2420,9 @@ fs_visitor::nir_emit_vs_intrinsic(const fs_builder &bld,
       assert(const_offset && "Indirect input loads not allowed");
       src = offset(src, bld, const_offset->u32[0]);
 
+      if (type_sz(type) == 8)
+         first_component /= 2;
+
       for (unsigned j = 0; j < num_components; j++) {
          bld.MOV(offset(dest, bld, j), offset(src, bld, j + first_component));
       }