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-rw-r--r--src/compiler/nir/nir.c4
-rw-r--r--src/compiler/nir/nir_gather_info.c1
-rw-r--r--src/compiler/nir/nir_intrinsics.py1
-rw-r--r--src/compiler/shader_enums.c1
-rw-r--r--src/compiler/shader_enums.h14
5 files changed, 21 insertions, 0 deletions
diff --git a/src/compiler/nir/nir.c b/src/compiler/nir/nir.c
index ef911540f37..ea28fbd1af5 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_FIRST_VERTEX:
+ return nir_intrinsic_load_first_vertex;
case SYSTEM_VALUE_BASE_VERTEX:
return nir_intrinsic_load_base_vertex;
case SYSTEM_VALUE_INVOCATION_ID:
@@ -2066,6 +2068,8 @@ nir_system_value_from_intrinsic(nir_intrinsic_op intrin)
return SYSTEM_VALUE_BASE_INSTANCE;
case nir_intrinsic_load_vertex_id_zero_base:
return SYSTEM_VALUE_VERTEX_ID_ZERO_BASE;
+ case nir_intrinsic_load_first_vertex:
+ return SYSTEM_VALUE_FIRST_VERTEX;
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 eaf0ca68b0f..a6a699ab25f 100644
--- a/src/compiler/nir/nir_gather_info.c
+++ b/src/compiler/nir/nir_gather_info.c
@@ -265,6 +265,7 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader)
case nir_intrinsic_load_vertex_id:
case nir_intrinsic_load_vertex_id_zero_base:
case nir_intrinsic_load_base_vertex:
+ case nir_intrinsic_load_first_vertex:
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 1bc99552cd7..f26aaf35ee3 100644
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -413,6 +413,7 @@ system_value("frag_coord", 4)
system_value("front_face", 1)
system_value("vertex_id", 1)
system_value("vertex_id_zero_base", 1)
+system_value("first_vertex", 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 d0ff11b41e2..ebee076b43c 100644
--- a/src/compiler/shader_enums.c
+++ b/src/compiler/shader_enums.c
@@ -216,6 +216,7 @@ gl_system_value_name(gl_system_value sysval)
ENUM(SYSTEM_VALUE_INSTANCE_ID),
ENUM(SYSTEM_VALUE_INSTANCE_INDEX),
ENUM(SYSTEM_VALUE_VERTEX_ID_ZERO_BASE),
+ ENUM(SYSTEM_VALUE_FIRST_VERTEX),
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 2aedbb9b3fa..8a277a14f21 100644
--- a/src/compiler/shader_enums.h
+++ b/src/compiler/shader_enums.h
@@ -504,6 +504,20 @@ typedef enum
SYSTEM_VALUE_BASE_VERTEX,
/**
+ * Depending on the type of the draw call (indexed or non-indexed),
+ * is the value of \c basevertex passed to \c glDrawElementsBaseVertex and
+ * similar, or is the value of \c first passed to \c glDrawArrays and
+ * similar.
+ *
+ * \note
+ * It can be used to calculate the \c SYSTEM_VALUE_VERTEX_ID as
+ * \c SYSTEM_VALUE_VERTEX_ID_ZERO_BASE plus \c SYSTEM_VALUE_FIRST_VERTEX.
+ *
+ * \sa SYSTEM_VALUE_VERTEX_ID_ZERO_BASE, SYSTEM_VALUE_VERTEX_ID
+ */
+ SYSTEM_VALUE_FIRST_VERTEX,
+
+ /**
* Value of \c baseinstance passed to instanced draw entry points
*
* \sa SYSTEM_VALUE_INSTANCE_ID