nir: add support for flushing to zero denorm constants

v2:
- Refactor conditions and shared function (Connor).
- Move code to nir_eval_const_opcode() (Connor).
- Don't flush to zero on fquantize2f16
  From Vulkan spec, VK_KHR_shader_float_controls section:

  "3) Do denorm and rounding mode controls apply to OpSpecConstantOp?

  RESOLVED: Yes, except when the opcode is OpQuantizeToF16."

v3:
- Fix bit size (Connor).
- Fix execution mode on nir_loop_analize (Connor).

v4:
- Adapt after API changes to nir_eval_const_opcode (Andres).

v5:
- Simplify constant_denorm_flush_to_zero (Caio).

v6:
- Adapt after API changes and to use the new constant
  constructors (Andres).
- Replace MAYBE_UNUSED with UNUSED as the first is going
  away (Andres).

v7:
- Adapt to newly added calls (Andres).
- Simplified the auxiliary to flush denorms to zero (Caio).
- Updated to renamed supported capabilities member (Andres).

Signed-off-by: Samuel Iglesias Gonsálvez <[email protected]>
Signed-off-by: Andres Gomez <[email protected]>
Reviewed-by: Connor Abbott <[email protected]> [v4]
Reviewed-by: Caio Marcelo de Oliveira Filho <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/compiler/nir/nir_constant_expressions.h b/src/compiler/nir/nir_constant_expressions.h
index 087663f7480..6450d5c3d03 100644
--- a/src/compiler/nir/nir_constant_expressions.h
+++ b/src/compiler/nir/nir_constant_expressions.h
@@ -32,6 +32,7 @@
 
 void nir_eval_const_opcode(nir_op op, nir_const_value *dest,
                            unsigned num_components, unsigned bit_size,
-                           nir_const_value **src);
+                           nir_const_value **src,
+                           unsigned float_controls_execution_mode);
 
 #endif /* NIR_CONSTANT_EXPRESSIONS_H */