[Mesa-dev] [PATCH v2 26/29] i965/fs: add support for shader float control to remove_extra_rounding_modes()

[Samuel Iglesias Gonsálvez]

The remove_extra_rounding_modes() optimization will remove duplicated
rounding mode changes.

v2:
- Fix bug in the rounding mode change (Alejandro)

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias at igalia.com>
---
 src/intel/compiler/brw_fs.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp
index 0ccff00dd4c..69a4a8debfe 100644
--- a/src/intel/compiler/brw_fs.cpp
+++ b/src/intel/compiler/brw_fs.cpp
@@ -3457,9 +3457,16 @@ bool
 fs_visitor::remove_extra_rounding_modes()
 {
    bool progress = false;
+   unsigned execution_mode = this->nir->info.shader_float_controls_execution_mode;
+
+   brw_rnd_mode base_mode = BRW_RND_MODE_UNSPECIFIED;
+   if (execution_mode & SHADER_ROUNDING_MODE_RTE)
+      base_mode = BRW_RND_MODE_RTNE;
+   if (execution_mode & SHADER_ROUNDING_MODE_RTZ)
+      base_mode = BRW_RND_MODE_RTZ;
 
    foreach_block (block, cfg) {
-      brw_rnd_mode prev_mode = BRW_RND_MODE_UNSPECIFIED;
+      brw_rnd_mode prev_mode = base_mode;
 
       foreach_inst_in_block_safe (fs_inst, inst, block) {
          if (inst->opcode == SHADER_OPCODE_RND_MODE) {
-- 
2.19.1