diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs.cpp | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 5380abfe2f4..8ce39543002 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -2300,7 +2300,8 @@ clear_deps_for_inst_src(fs_inst *inst, int dispatch_width, bool *deps, void fs_visitor::insert_gen4_pre_send_dependency_workarounds(fs_inst *inst) { - int write_len = inst->regs_written() * dispatch_width / 8; + int reg_size = dispatch_width / 8; + int write_len = inst->regs_written() * reg_size; int first_write_grf = inst->dst.reg; bool needs_dep[BRW_MAX_MRF]; assert(write_len < (int)sizeof(needs_dep) - 1); @@ -2339,14 +2340,19 @@ fs_visitor::insert_gen4_pre_send_dependency_workarounds(fs_inst *inst) * instruction but a MOV that might have left us an outstanding * dependency has more latency than a MOV. */ - if (scan_inst->dst.file == GRF && - scan_inst->dst.reg >= first_write_grf && - scan_inst->dst.reg < first_write_grf + write_len && - needs_dep[scan_inst->dst.reg - first_write_grf]) { - inst->insert_before(DEP_RESOLVE_MOV(scan_inst->dst.reg)); - needs_dep[scan_inst->dst.reg - first_write_grf] = false; - if (scan_inst_16wide) - needs_dep[scan_inst->dst.reg - first_write_grf + 1] = false; + if (scan_inst->dst.file == GRF) { + for (int i = 0; i < scan_inst->regs_written(); i++) { + int reg = scan_inst->dst.reg + i * reg_size; + + if (reg >= first_write_grf && + reg < first_write_grf + write_len && + needs_dep[reg - first_write_grf]) { + inst->insert_before(DEP_RESOLVE_MOV(reg)); + needs_dep[reg - first_write_grf] = false; + if (scan_inst_16wide) + needs_dep[reg - first_write_grf + 1] = false; + } + } } /* Clear the flag for registers that actually got read (as expected). */ |