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nir/lower_wpos_ytransform: handle intrinsic ddx

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Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30565>
This commit is contained in:
Alyssa Rosenzweig
2024-07-23 12:49:07 -04:00
committed by Marge Bot
parent 9f9f96d2f9
commit e0cc041674
1 changed files with 19 additions and 0 deletions
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src/compiler/nir/nir_lower_wpos_ytransform.c
+19
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@@ -255,6 +255,21 @@ lower_fddy(lower_wpos_ytransform_state *state, nir_alu_instr *fddy)
fddy->src[0].swizzle[i] = MIN2(i, pt->num_components - 1);
}
static void
lower_ddy(lower_wpos_ytransform_state *state, nir_intrinsic_instr *ddy)
{
nir_builder *b = &state->b;
nir_def *wpostrans = get_transform(state);
b->cursor = nir_before_instr(&ddy->instr);
nir_def *p = ddy->src[0].ssa;
nir_def *trans = nir_f2fN(b, nir_channel(b, wpostrans, 0), p->bit_size);
nir_def *pt = nir_fmul(b, p, trans);
nir_src_rewrite(&ddy->src[0], pt);
}
/* Multiply interp_deref_at_offset's or load_barycentric_at_offset's offset
* by transform.x to flip it.
*/
@@ -332,6 +347,10 @@ lower_wpos_ytransform_instr(nir_builder *b, nir_instr *instr,
lower_interp_deref_or_load_baryc_at_offset(state, intr, 1);
} else if (intr->intrinsic == nir_intrinsic_load_barycentric_at_offset) {
lower_interp_deref_or_load_baryc_at_offset(state, intr, 0);
} else if (intr->intrinsic == nir_intrinsic_ddy ||
intr->intrinsic == nir_intrinsic_ddy_fine ||
intr->intrinsic == nir_intrinsic_ddy_coarse) {
lower_ddy(state, intr);
}
} else if (instr->type == nir_instr_type_alu) {
nir_alu_instr *alu = nir_instr_as_alu(instr);