diff options
| author | Alyssa Rosenzweig <[email protected]> | 2018-05-02 02:04:55 +0000 |
|---|---|---|
| committer | Christian Gmeiner <[email protected]> | 2018-05-18 22:44:09 +0200 |
| commit | 5d85a0a55b8c061fa6644ac24163542e3025834c (patch) | |
| tree | 4238fcc08e99f410588f3dec7498d4e86ddc1e03 /src/compiler/nir/nir.h | |
| parent | 8ed2cabd04c4697802f4d275f839640826e462ee (diff) | |
nir: Implement optional b2f->iand lowering
This pass is required by the Midgard compiler; our instruction set uses
NIR-style booleans (~0 for true) but lacks a dedicated b2f instruction.
Normally, this lowering pass would be implemented in a backend-specific
algebraic pass, but this conflicts with the existing iand->b2f pass in
nir_opt_algebraic.py, hanging the compiler. This patch thus makes the
existing pass optional (default on -- all other backends should remain
unaffected), adding an optional pass for lowering the opposite
direction.
v2: Defer lowering until late algebraic optimisations to allow
optimising the b2f instruction itself.
Signed-off-by: Alyssa Rosenzweig <[email protected]>
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Christian Gmeiner <[email protected]>
Diffstat (limited to 'src/compiler/nir/nir.h')
| -rw-r--r-- | src/compiler/nir/nir.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h index a379928cdcd..f6086bd6c05 100644 --- a/src/compiler/nir/nir.h +++ b/src/compiler/nir/nir.h @@ -1894,6 +1894,9 @@ typedef struct nir_shader_compiler_options { /** enables rules to lower idiv by power-of-two: */ bool lower_idiv; + /* lower b2f to iand */ + bool lower_b2f; + /* Does the native fdot instruction replicate its result for four * components? If so, then opt_algebraic_late will turn all fdotN * instructions into fdot_replicatedN instructions. |