unsigned num_components)
{
if (type_sz(dest.type) <= 2) {
- fs_reg read_offset = bld.vgrf(BRW_REGISTER_TYPE_UD);
- bld.MOV(read_offset, offset_reg);
- for (unsigned i = 0; i < num_components; i++) {
- fs_reg read_reg =
- emit_byte_scattered_read(bld, surf_index, read_offset,
+ assert(dest.stride == 1);
+
+ if (num_components > 1) {
+ /* Pairs of 16-bit components can be read with untyped read, for 16-bit
+ * vec3 4th component is ignored.
+ */
+ fs_reg read_result =
+ emit_untyped_read(bld, surf_index, offset_reg,
+ 1 /* dims */, DIV_ROUND_UP(num_components, 2),
+ BRW_PREDICATE_NONE);
+ shuffle_32bit_load_result_to_16bit_data(bld,
+ retype(dest, BRW_REGISTER_TYPE_W),
+ retype(read_result, BRW_REGISTER_TYPE_D),
+ num_components);
+ } else {
+ assert(num_components == 1);
+ /* scalar 16-bit are read using one byte_scattered_read message */
+ fs_reg read_result =
+ emit_byte_scattered_read(bld, surf_index, offset_reg,
1 /* dims */, 1,
type_sz(dest.type) * 8 /* bit_size */,
BRW_PREDICATE_NONE);
- bld.MOV(offset(dest, bld, i), subscript(read_reg, dest.type, 0));
- bld.ADD(read_offset, read_offset, brw_imm_ud(type_sz(dest.type)));
+ bld.MOV(dest, subscript(read_result, dest.type, 0));
}
} else if (type_sz(dest.type) == 4) {
fs_reg read_result = emit_untyped_read(bld, surf_index, offset_reg,