Running Tomb Raider on Nouveau I found some flicker caused by ignoring precise
modifiers on variables inside Nouveau.
This series add precise/invariant handling to TGSI, which can be then used by
drivers to disable certain unsafe optimisations which may otherwise alter
calculations, which depend on having the same result across shaders.
This series fixes this bug in Tomb Raider and one CTS test for 4.4 and 4.5
No piglit regression on my nve6
Changes since v2:
* documentation for precise modifier
* disable TGSI MAD peephole for precise instructions
* drop MAD split patch in nv50ir
Karol Herbst (10):
tgsi: add precise flag to tgsi_instruction
tgsi/dump: print _PRECISE modifier on Instructions
st/glsl_to_tgsi: handle precise modifier
tgsi: populate precise
tgsi/text: parse _PRECISE modifier
gallium/docs: add precise instruction modifier
st/glsl_to_tgsi: don't optimize mul+add to mad if expression is
precise
nv50/ir: add precise field to Instruction
nv50/ir/tgsi: handle precise for most ALU instructions
nv50/ir: disable mul+add to mad for precise instructions
src/gallium/auxiliary/tgsi/tgsi_build.c | 4 +++
src/gallium/auxiliary/tgsi/tgsi_dump.c | 4 +++
src/gallium/auxiliary/tgsi/tgsi_text.c | 17 ++++++++--
src/gallium/auxiliary/tgsi/tgsi_ureg.c | 8 ++++-
src/gallium/auxiliary/tgsi/tgsi_ureg.h | 14 ++++++++-
src/gallium/auxiliary/util/u_simple_shaders.c | 2 +-
src/gallium/docs/source/tgsi.rst | 8 ++++-
src/gallium/drivers/nouveau/codegen/nv50_ir.h | 1 +
.../drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp | 2 ++
.../drivers/nouveau/codegen/nv50_ir_peephole.cpp | 6 +++-
src/gallium/include/pipe/p_shader_tokens.h | 3 +-
src/gallium/state_trackers/nine/nine_shader.c | 6 ++--
src/mesa/state_tracker/st_atifs_to_tgsi.c | 36 +++++++++++-----------
src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 21 ++++++++++---
src/mesa/state_tracker/st_mesa_to_tgsi.c | 6 ++--
15 files changed, 101 insertions(+), 37 deletions(-)
--
2.13.1
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