Mesa (master): pan/mdg: Implement gl_SampleID
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Wed Jul 15 22:34:42 UTC 2020
Module: Mesa
Branch: master
Commit: da2eed36f3ccdd8ada2dc701d722f475dcf3dbea
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=da2eed36f3ccdd8ada2dc701d722f475dcf3dbea
Author: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Date: Wed Jul 15 09:56:24 2020 -0400
pan/mdg: Implement gl_SampleID
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5929>
---
src/panfrost/midgard/midgard_compile.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/src/panfrost/midgard/midgard_compile.c b/src/panfrost/midgard/midgard_compile.c
index d8780dfd60b..fa9ff9eb07f 100644
--- a/src/panfrost/midgard/midgard_compile.c
+++ b/src/panfrost/midgard/midgard_compile.c
@@ -1635,6 +1635,22 @@ emit_vertex_builtin(compiler_context *ctx, nir_intrinsic_instr *instr)
emit_attr_read(ctx, reg, vertex_builtin_arg(instr->intrinsic), 1, nir_type_int);
}
+static void
+emit_msaa_builtin(compiler_context *ctx, nir_intrinsic_instr *instr)
+{
+ unsigned reg = nir_dest_index(&instr->dest);
+
+ midgard_instruction ld = m_ld_color_buffer_32u(reg, 0);
+ ld.load_store.op = midgard_op_ld_color_buffer_32u_old;
+ ld.load_store.address = 97;
+ ld.load_store.arg_2 = 0x1E;
+
+ for (int i = 0; i < 4; ++i)
+ ld.swizzle[0][i] = COMPONENT_X;
+
+ emit_mir_instruction(ctx, ld);
+}
+
static void
emit_control_barrier(compiler_context *ctx)
{
@@ -2015,6 +2031,10 @@ emit_intrinsic(compiler_context *ctx, nir_intrinsic_instr *instr)
emit_vertex_builtin(ctx, instr);
break;
+ case nir_intrinsic_load_sample_id:
+ emit_msaa_builtin(ctx, instr);
+ break;
+
case nir_intrinsic_memory_barrier_buffer:
case nir_intrinsic_memory_barrier_shared:
break;
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