diff options
| -rw-r--r-- | src/intel/compiler/brw_fs.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/src/intel/compiler/brw_fs.cpp b/src/intel/compiler/brw_fs.cpp index 4a8f8ea5740..b4730c3d3e4 100644 --- a/src/intel/compiler/brw_fs.cpp +++ b/src/intel/compiler/brw_fs.cpp @@ -3996,18 +3996,22 @@ fs_visitor::lower_integer_multiplication() bool needs_mov = false; fs_reg orig_dst = inst->dst; + + /* Get a new VGRF for the "low" 32x16-bit multiplication result if + * reusing the original destination is impossible due to hardware + * restrictions, source/destination overlap, or it being the null + * register. + */ fs_reg low = inst->dst; if (orig_dst.is_null() || orig_dst.file == MRF || regions_overlap(inst->dst, inst->size_written, inst->src[0], inst->size_read(0)) || regions_overlap(inst->dst, inst->size_written, - inst->src[1], inst->size_read(1))) { + inst->src[1], inst->size_read(1)) || + inst->dst.stride >= 4) { needs_mov = true; - /* Get a new VGRF but keep the same stride as inst->dst */ low = fs_reg(VGRF, alloc.allocate(regs_written(inst)), inst->dst.type); - low.stride = inst->dst.stride; - low.offset = inst->dst.offset % REG_SIZE; } /* Get a new VGRF but keep the same stride as inst->dst */ |