Mesa (master): pan/bi: Support centroid and sample interpolations

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Module: Mesa
Branch: master
Commit: 2522f509a3d8100bd8694fa4f4a9d55e254ae289
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2522f509a3d8100bd8694fa4f4a9d55e254ae289

Author: Boris Brezillon <boris.brezillon at collabora.com>
Date:   Thu Nov  5 12:11:54 2020 +0100

pan/bi: Support centroid and sample interpolations

Signed-off-by: Boris Brezillon <boris.brezillon at collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7472>

---

 src/panfrost/bifrost/bifrost_compile.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/panfrost/bifrost/bifrost_compile.c b/src/panfrost/bifrost/bifrost_compile.c
index aae3a1a500c..f0adf50fc5a 100644
--- a/src/panfrost/bifrost/bifrost_compile.c
+++ b/src/panfrost/bifrost/bifrost_compile.c
@@ -144,6 +144,20 @@ bi_emit_ld_output(bi_context *ctx, nir_intrinsic_instr *instr)
         bi_emit(ctx, ins);
 }
 
+static enum bifrost_interp_mode
+bi_interp_for_intrinsic(nir_intrinsic_op op)
+{
+        switch (op) {
+        case nir_intrinsic_load_barycentric_centroid:
+                return BIFROST_INTERP_CENTROID;
+        case nir_intrinsic_load_barycentric_sample:
+                return BIFROST_INTERP_SAMPLE;
+        case nir_intrinsic_load_barycentric_pixel:
+        default:
+                return BIFROST_INTERP_CENTER;
+        }
+}
+
 static void
 bi_emit_ld_vary(bi_context *ctx, nir_intrinsic_instr *instr)
 {
@@ -154,6 +168,14 @@ bi_emit_ld_vary(bi_context *ctx, nir_intrinsic_instr *instr)
         ins.dest_type = nir_type_float | nir_dest_bit_size(instr->dest);
         ins.format = ins.dest_type;
 
+        if (instr->intrinsic == nir_intrinsic_load_interpolated_input) {
+                nir_intrinsic_instr *parent = nir_src_as_intrinsic(instr->src[0]);
+                if (parent) {
+                        ins.load_vary.interp_mode =
+                                bi_interp_for_intrinsic(parent->intrinsic);
+                }
+        }
+
         if (nir_src_is_const(*nir_get_io_offset_src(instr))) {
                 /* Zero it out for direct */
                 ins.src[1] = BIR_INDEX_ZERO;
@@ -681,6 +703,8 @@ emit_intrinsic(bi_context *ctx, nir_intrinsic_instr *instr)
 
         switch (instr->intrinsic) {
         case nir_intrinsic_load_barycentric_pixel:
+        case nir_intrinsic_load_barycentric_centroid:
+        case nir_intrinsic_load_barycentric_sample:
                 /* stub */
                 break;
         case nir_intrinsic_load_interpolated_input: