[Mesa-dev] [PATCH 1/5] compiler: Add SYSTEM_VALUE_IS_INDEXED_DRAW and instrinsics
Antia Puentes
apuentes at igalia.com
Sat Apr 28 12:09:18 UTC 2018
This VS system value contains if the draw command used to start the
rendering was an indexed draw command or a non-indexed one
(~0/0 respectively). Useful to calculate the gl_BaseVertex as:
(SYSTEM_VALUE_IS_INDEXED_DRAW & SYSTEM_VALUE_FIRST_VERTEX).
---
src/compiler/nir/nir.c | 4 ++++
src/compiler/nir/nir_gather_info.c | 1 +
src/compiler/nir/nir_intrinsics.py | 1 +
src/compiler/shader_enums.c | 1 +
src/compiler/shader_enums.h | 7 +++++++
5 files changed, 14 insertions(+)
diff --git a/src/compiler/nir/nir.c b/src/compiler/nir/nir.c
index ea28fbd1af5..dc1c560319e 100644
--- a/src/compiler/nir/nir.c
+++ b/src/compiler/nir/nir.c
@@ -1991,6 +1991,8 @@ nir_intrinsic_from_system_value(gl_system_value val)
return nir_intrinsic_load_base_instance;
case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
return nir_intrinsic_load_vertex_id_zero_base;
+ case SYSTEM_VALUE_IS_INDEXED_DRAW:
+ return nir_intrinsic_load_is_indexed_draw;
case SYSTEM_VALUE_FIRST_VERTEX:
return nir_intrinsic_load_first_vertex;
case SYSTEM_VALUE_BASE_VERTEX:
@@ -2070,6 +2072,8 @@ nir_system_value_from_intrinsic(nir_intrinsic_op intrin)
return SYSTEM_VALUE_VERTEX_ID_ZERO_BASE;
case nir_intrinsic_load_first_vertex:
return SYSTEM_VALUE_FIRST_VERTEX;
+ case nir_intrinsic_load_is_indexed_draw:
+ return SYSTEM_VALUE_IS_INDEXED_DRAW;
case nir_intrinsic_load_base_vertex:
return SYSTEM_VALUE_BASE_VERTEX;
case nir_intrinsic_load_invocation_id:
diff --git a/src/compiler/nir/nir_gather_info.c b/src/compiler/nir/nir_gather_info.c
index a6a699ab25f..dba9f199ec6 100644
--- a/src/compiler/nir/nir_gather_info.c
+++ b/src/compiler/nir/nir_gather_info.c
@@ -266,6 +266,7 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader)
case nir_intrinsic_load_vertex_id_zero_base:
case nir_intrinsic_load_base_vertex:
case nir_intrinsic_load_first_vertex:
+ case nir_intrinsic_load_is_indexed_draw:
case nir_intrinsic_load_base_instance:
case nir_intrinsic_load_instance_id:
case nir_intrinsic_load_sample_id:
diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py
index f26aaf35ee3..b1754a7e50e 100644
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -414,6 +414,7 @@ system_value("front_face", 1)
system_value("vertex_id", 1)
system_value("vertex_id_zero_base", 1)
system_value("first_vertex", 1)
+system_value("is_indexed_draw", 1)
system_value("base_vertex", 1)
system_value("instance_id", 1)
system_value("base_instance", 1)
diff --git a/src/compiler/shader_enums.c b/src/compiler/shader_enums.c
index ebee076b43c..d596d7d04a0 100644
--- a/src/compiler/shader_enums.c
+++ b/src/compiler/shader_enums.c
@@ -217,6 +217,7 @@ gl_system_value_name(gl_system_value sysval)
ENUM(SYSTEM_VALUE_INSTANCE_INDEX),
ENUM(SYSTEM_VALUE_VERTEX_ID_ZERO_BASE),
ENUM(SYSTEM_VALUE_FIRST_VERTEX),
+ ENUM(SYSTEM_VALUE_IS_INDEXED_DRAW),
ENUM(SYSTEM_VALUE_BASE_VERTEX),
ENUM(SYSTEM_VALUE_BASE_INSTANCE),
ENUM(SYSTEM_VALUE_DRAW_ID),
diff --git a/src/compiler/shader_enums.h b/src/compiler/shader_enums.h
index 8a277a14f21..1ef4d5a33d0 100644
--- a/src/compiler/shader_enums.h
+++ b/src/compiler/shader_enums.h
@@ -517,6 +517,13 @@ typedef enum
*/
SYSTEM_VALUE_FIRST_VERTEX,
+ /**
+ * If the Draw command used to start the rendering was an indexed draw
+ * or not (~0/0). Useful to calculate \c SYSTEM_VALUE_BASE_VERTEX as
+ * \c SYSTEM_VALUE_IS_INDEXED_DRAW & \c SYSTEM_VALUE_FIRST_VERTEX.
+ */
+ SYSTEM_VALUE_IS_INDEXED_DRAW,
+
/**
* Value of \c baseinstance passed to instanced draw entry points
*
--
2.14.1
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