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authorIago Toral Quiroga <[email protected]>2015-06-01 09:28:29 +0200
committerSamuel Iglesias Gonsalvez <[email protected]>2015-09-25 08:39:22 +0200
commit5b186aafe7a8d3f96a99ad2fddd2bff99d99e923 (patch)
tree4d8e088defb5c0144beae4e35d5439857a4d43b0 /src/mesa/drivers/dri
parente59ae238b606af0f3ec5c722ac2d1495caed091a (diff)
i965/nir/fs: Implement nir_intrinsic_load_ssbo
Reviewed-by: Kristian Høgsberg <[email protected]>
Diffstat (limited to 'src/mesa/drivers/dri')
-rw-r--r--src/mesa/drivers/dri/i965/brw_fs_nir.cpp62
1 files changed, 62 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index bcb5e1bc881..a05698e53e2 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -1567,6 +1567,68 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld, nir_intrinsic_instr *instr
break;
}
+ case nir_intrinsic_load_ssbo_indirect:
+ has_indirect = true;
+ /* fallthrough */
+ case nir_intrinsic_load_ssbo: {
+ assert(devinfo->gen >= 7);
+
+ nir_const_value *const_uniform_block =
+ nir_src_as_const_value(instr->src[0]);
+
+ fs_reg surf_index;
+ if (const_uniform_block) {
+ unsigned index = stage_prog_data->binding_table.ubo_start +
+ const_uniform_block->u[0];
+ surf_index = fs_reg(index);
+ brw_mark_surface_used(prog_data, index);
+ } else {
+ surf_index = vgrf(glsl_type::uint_type);
+ bld.ADD(surf_index, get_nir_src(instr->src[0]),
+ fs_reg(stage_prog_data->binding_table.ubo_start));
+ surf_index = bld.emit_uniformize(surf_index);
+
+ /* Assume this may touch any UBO. It would be nice to provide
+ * a tighter bound, but the array information is already lowered away.
+ */
+ brw_mark_surface_used(prog_data,
+ stage_prog_data->binding_table.ubo_start +
+ shader_prog->NumUniformBlocks - 1);
+ }
+
+ /* Get the offset to read from */
+ fs_reg offset_reg = vgrf(glsl_type::uint_type);
+ unsigned const_offset_bytes = 0;
+ if (has_indirect) {
+ bld.MOV(offset_reg, get_nir_src(instr->src[1]));
+ } else {
+ const_offset_bytes = instr->const_index[0];
+ bld.MOV(offset_reg, fs_reg(const_offset_bytes));
+ }
+
+ /* Read the vector */
+ for (int i = 0; i < instr->num_components; i++) {
+ fs_reg read_result = emit_untyped_read(bld, surf_index, offset_reg,
+ 1 /* dims */, 1 /* size */,
+ BRW_PREDICATE_NONE);
+ read_result.type = dest.type;
+ bld.MOV(dest, read_result);
+ dest = offset(dest, bld, 1);
+
+ /* Vector components are stored contiguous in memory */
+ if (i < instr->num_components) {
+ if (!has_indirect) {
+ const_offset_bytes += 4;
+ bld.MOV(offset_reg, fs_reg(const_offset_bytes));
+ } else {
+ bld.ADD(offset_reg, offset_reg, brw_imm_ud(4));
+ }
+ }
+ }
+
+ break;
+ }
+
case nir_intrinsic_load_input_indirect:
has_indirect = true;
/* fallthrough */