diff options
author | Iago Toral Quiroga <[email protected]> | 2015-06-01 09:28:29 +0200 |
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committer | Samuel Iglesias Gonsalvez <[email protected]> | 2015-09-25 08:39:22 +0200 |
commit | 5b186aafe7a8d3f96a99ad2fddd2bff99d99e923 (patch) | |
tree | 4d8e088defb5c0144beae4e35d5439857a4d43b0 /src | |
parent | e59ae238b606af0f3ec5c722ac2d1495caed091a (diff) |
i965/nir/fs: Implement nir_intrinsic_load_ssbo
Reviewed-by: Kristian Høgsberg <[email protected]>
Diffstat (limited to 'src')
-rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 62 |
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 */ |