This seems to be a problem in combination with the lower_regioning
pass introduced by a future commit, which can modify a SIMD-split
instruction causing its execution size to become illegal again. A
subsequent call to lower_simd_width() would hit this bug on a future
platform.
Cc: mesa-sta...@lists.freedesktop.org
---
src/intel/compiler/brw_fs.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp
index 97544fdf465..4aacc72a1b7 100644
--- a/src/intel/compiler/brw_fs.cpp
+++ b/src/intel/compiler/brw_fs.cpp
@@ -5666,7 +5666,7 @@ static fs_reg
emit_unzip(const fs_builder &lbld, fs_inst *inst, unsigned i)
{
/* Specified channel group from the source region. */
- const fs_reg src = horiz_offset(inst->src[i], lbld.group());
+ const fs_reg src = horiz_offset(inst->src[i], lbld.group() - inst->group);
if (needs_src_copy(lbld, inst, i)) {
/* Builder of the right width to perform the copy avoiding uninitialized
@@ -5757,7 +5757,7 @@ emit_zip(const fs_builder &lbld_before, const fs_builder
&lbld_after,
assert(lbld_before.group() == lbld_after.group());
/* Specified channel group from the destination region. */
- const fs_reg dst = horiz_offset(inst->dst, lbld_after.group());
+ const fs_reg dst = horiz_offset(inst->dst, lbld_after.group() -
inst->group);
const unsigned dst_size = inst->size_written /
inst->dst.component_size(inst->exec_size);
--
2.19.2
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