nir: Add a load_sysval_nv intrinsic

Reviewed-by: Emma Anholt <emma@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25000>

diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index 51c9408..39f3865 100644 (file)
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -2084,7 +2084,8 @@ nir_intrinsic_can_reorder(nir_intrinsic_instr *instr)
    } else if (instr->intrinsic == nir_intrinsic_load_ssbo ||
               instr->intrinsic == nir_intrinsic_bindless_image_load ||
               instr->intrinsic == nir_intrinsic_image_deref_load ||
-              instr->intrinsic == nir_intrinsic_image_load) {
+              instr->intrinsic == nir_intrinsic_image_load ||
+              instr->intrinsic == nir_intrinsic_load_sysval_nv) {
       return nir_intrinsic_access(instr) & ACCESS_CAN_REORDER;
    } else {
       const nir_intrinsic_info *info =

diff --git a/src/compiler/nir/nir_divergence_analysis.c b/src/compiler/nir/nir_divergence_analysis.c
index b6504ce..14079ef 100644 (file)
--- a/src/compiler/nir/nir_divergence_analysis.c
+++ b/src/compiler/nir/nir_divergence_analysis.c
@@ -606,6 +606,7 @@ visit_intrinsic(nir_shader *shader, nir_intrinsic_instr *instr)
    case nir_intrinsic_load_ray_hit_kind:
    case nir_intrinsic_load_ray_flags:
    case nir_intrinsic_load_cull_mask:
+   case nir_intrinsic_load_sysval_nv:
    case nir_intrinsic_report_ray_intersection:
    case nir_intrinsic_rq_proceed:
    case nir_intrinsic_rq_load:

diff --git a/src/compiler/nir/nir_intrinsics.py b/src/compiler/nir/nir_intrinsics.py
index 07bcea5..526413f 100644 (file)
--- a/src/compiler/nir/nir_intrinsics.py
+++ b/src/compiler/nir/nir_intrinsics.py
@@ -1954,6 +1954,10 @@ system_value("leaf_procedural_intel", 1, bit_sizes=[1])
 system_value("btd_shader_type_intel", 1)
 system_value("ray_query_global_intel", 1, bit_sizes=[64])
 
+# NVIDIA-specific intrinsics
+intrinsic("load_sysval_nv", dest_comp=1, src_comp=[], bit_sizes=[32, 64],
+          indices=[ACCESS, BASE], flags=[CAN_ELIMINATE])
+
 # In order to deal with flipped render targets, gl_PointCoord may be flipped
 # in the shader requiring a shader key or extra instructions or it may be
 # flipped in hardware based on a state bit.  This version of gl_PointCoord