commit 14d74c07aa18da2e24750faf3d23502230f4a779
author Iago Toral Quiroga <itoral@igalia.com> Thu Jul 30 11:29:12 2020 +0200
committer Marge Bot <eric+marge@anholt.net> Tue Oct 13 21:21:32 2020 +0000
tree 622b2a8c76a852372764bed11f8f145508131f83
parent 3310c1542cc02b70714336d79193f4cbf4cd3085

broadcom/compiler: handle gl_SampleMask writes in fragment shaders

We didn't need this until now, since this was included with GLES 3.2,
but we need it for Vulkan.

Eric had already done the plumbing for it though, we just need to
actually emit the mask.

Fixes some tests in:
dEQP-VK.renderpass.suballocation.multisample_resolve.*

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>

src/broadcom/compiler/nir_to_vir.c

diff --git a/src/broadcom/compiler/nir_to_vir.c b/src/broadcom/compiler/nir_to_vir.c
index 12dcfe9..e40c1f0 100644
--- a/src/broadcom/compiler/nir_to_vir.c
+++ b/src/broadcom/compiler/nir_to_vir.c
@@ -1328,11 +1328,12 @@
 static void
 emit_frag_end(struct v3d_compile *c)
 {
-        /* XXX
         if (c->output_sample_mask_index != -1) {
-                vir_MS_MASK(c, c->outputs[c->output_sample_mask_index]);
+                vir_SETMSF_dest(c, vir_nop_reg(),
+                                vir_AND(c,
+                                        vir_MSF(c),
+                                        c->outputs[c->output_sample_mask_index]));
         }
-        */
 
         bool has_any_tlb_color_write = false;
         for (int rt = 0; rt < V3D_MAX_DRAW_BUFFERS; rt++) {