commit c9ab73296c1c80796b6a3e8cfc1affb486e4dd81
author Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Fri May 01 18:24:11 2020 -0400
committer Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Mon May 04 11:08:15 2020 -0400
tree f33b6922be9722dde30fbd0e1e6582076e20b180
parent 6627b20de3511da153f2733a649b22c13d9e570a

pan/bi: Handle discard_if in NIR->BIR naively

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4883>

src/panfrost/bifrost/bifrost_compile.c

diff --git a/src/panfrost/bifrost/bifrost_compile.c b/src/panfrost/bifrost/bifrost_compile.c
index e656eeb..2b5b507 100644
--- a/src/panfrost/bifrost/bifrost_compile.c
+++ b/src/panfrost/bifrost/bifrost_compile.c
@@ -352,6 +352,25 @@
 }
 
 static void
+bi_emit_discard_if(bi_context *ctx, nir_intrinsic_instr *instr)
+{
+        nir_src cond = instr->src[0];
+        nir_alu_type T = nir_type_uint | nir_src_bit_size(cond);
+
+        bi_instruction discard = {
+                .type = BI_DISCARD,
+                .cond = BI_COND_NE,
+                .src_types = { T, T },
+                .src = {
+                        pan_src_index(&cond),
+                        BIR_INDEX_ZERO
+                },
+        };
+
+        bi_emit(ctx, discard);
+}
+
+static void
 emit_intrinsic(bi_context *ctx, nir_intrinsic_instr *instr)
 {
 
@@ -387,6 +406,10 @@
                 bi_emit_ld_frag_coord(ctx, instr);
                 break;
 
+        case nir_intrinsic_discard_if:
+                bi_emit_discard_if(ctx, instr);
+                break;
+
         case nir_intrinsic_load_ssbo_address:
                 bi_emit_sysval(ctx, &instr->instr, 1, 0);
                 break;