diff options
Diffstat (limited to 'src/intel/compiler/brw_fs_bank_conflicts.cpp')
| -rw-r--r-- | src/intel/compiler/brw_fs_bank_conflicts.cpp | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/intel/compiler/brw_fs_bank_conflicts.cpp b/src/intel/compiler/brw_fs_bank_conflicts.cpp index b64a3d4a8a8..42cdc6ef7dc 100644 --- a/src/intel/compiler/brw_fs_bank_conflicts.cpp +++ b/src/intel/compiler/brw_fs_bank_conflicts.cpp @@ -891,3 +891,22 @@ fs_visitor::opt_bank_conflicts() delete[] constrained; return true; } + +/** + * Estimate the number of GRF bank conflict cycles incurred by an instruction. + * + * Note that this neglects conflict cycles prior to register allocation + * because we don't know which bank each VGRF is going to end up aligned to. + */ +unsigned +fs_visitor::bank_conflict_cycles(const fs_inst *inst) const +{ + if (grf_used && inst->is_3src(devinfo) && + is_grf(inst->src[1]) && is_grf(inst->src[2]) && + bank_of(reg_of(inst->src[1])) == bank_of(reg_of(inst->src[2])) && + !is_conflict_optimized_out(devinfo, inst)) { + return DIV_ROUND_UP(inst->dst.component_size(inst->exec_size), REG_SIZE); + } else { + return 0; + } +} |