From: Samuel Iglesias Gonsalvez <sigles...@igalia.com>
Signed-off-by: Samuel Iglesias Gonsalvez <sigles...@igalia.com>
---
src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
index a6c6a2f..3c55a12 100644
--- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
@@ -1702,6 +1702,31 @@ fs_visitor::nir_emit_intrinsic(const fs_builder &bld,
nir_intrinsic_instr *instr
emit_barrier();
break;
+ case nir_intrinsic_get_buffer_size: {
+ nir_const_value *const_uniform_block =
nir_src_as_const_value(instr->src[0]);
+ unsigned ubo_index = const_uniform_block ? const_uniform_block->u[0] : 0;
+ int reg_width = dispatch_width / 8;
+
+ assert(shader->base.UniformBlocks[ubo_index].IsShaderStorage);
+
+ /* Set LOD = 0 */
+ fs_reg source = fs_reg(0);
+
+ int mlen = 1 * reg_width;
+ fs_reg src_payload = fs_reg(GRF, alloc.allocate(mlen),
+ BRW_REGISTER_TYPE_UD);
+ bld.LOAD_PAYLOAD(src_payload, &source, 1, 0);
+
+ fs_reg surf_index = fs_reg(prog_data->binding_table.ubo_start +
ubo_index);
+ fs_inst *inst = bld.emit(FS_OPCODE_GET_BUFFER_SIZE, dest,
+ src_payload, surf_index);
+ inst->header_size = 0;
+ inst->mlen = mlen;
+ inst->regs_written = 4 * reg_width;
+ bld.emit(inst);
+ break;
+ }
+
default:
unreachable("unknown intrinsic");
}
--
1.9.1
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