AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

tgsi_to_nir: Extract ttn_emulate_tgsi_front_face into its own function.

Browse Source 
We'll need to use the same logic in other places, so it makes sense to
have a separate function for this.

Signed-Off-By: Timur Kristóf <timur.kristof@gmail.com>
Tested-by: Andre Heider <a.heider@gmail.com>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Timur Kristóf
2019-02-08 22:11:08 +01:00
committed by Eric Anholt
parent 840c7d1ebd
commit f748fa47f8
1 changed files with 20 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/gallium/auxiliary/nir/tgsi_to_nir.c
+20 -14
View File
@@ -440,6 +440,25 @@ ttn_array_deref(struct ttn_compile *c, nir_variable *var, unsigned offset,
return nir_build_deref_array(&c->build, deref, index);
}
/* Special case: Turn the frontface varying into a load of the
* frontface intrinsic plus math, and appending the silly floats.
*/
static nir_ssa_def *
ttn_emulate_tgsi_front_face(struct ttn_compile *c)
{
nir_ssa_def *tgsi_frontface[4] = {
nir_bcsel(&c->build,
nir_load_front_face(&c->build, 1),
nir_imm_float(&c->build, 1.0),
nir_imm_float(&c->build, -1.0)),
nir_imm_float(&c->build, 0.0),
nir_imm_float(&c->build, 0.0),
nir_imm_float(&c->build, 1.0),
};
return nir_vec(&c->build, tgsi_frontface, 4);
}
static nir_src
ttn_src_for_file_and_index(struct ttn_compile *c, unsigned file, unsigned index,
struct tgsi_ind_register *indirect,
@@ -514,22 +533,9 @@ ttn_src_for_file_and_index(struct ttn_compile *c, unsigned file, unsigned index,
}
case TGSI_FILE_INPUT:
/* Special case: Turn the frontface varying into a load of the
* frontface intrinsic plus math, and appending the silly floats.
*/
if (c->scan->processor == PIPE_SHADER_FRAGMENT &&
c->scan->input_semantic_name[index] == TGSI_SEMANTIC_FACE) {
nir_ssa_def *tgsi_frontface[4] = {
nir_bcsel(&c->build,
nir_load_front_face(&c->build, 1),
nir_imm_float(&c->build, 1.0),
nir_imm_float(&c->build, -1.0)),
nir_imm_float(&c->build, 0.0),
nir_imm_float(&c->build, 0.0),
nir_imm_float(&c->build, 1.0),
};
return nir_src_for_ssa(nir_vec(&c->build, tgsi_frontface, 4));
return nir_src_for_ssa(ttn_emulate_tgsi_front_face(c));
} else {
/* Indirection on input arrays isn't supported by TTN. */
assert(!dim);