From 1dd3543ac1bebe089bfe3a8ae5efbe3f564e1144 Mon Sep 17 00:00:00 2001 From: Francisco Jerez Date: Mon, 13 Jul 2015 17:44:58 +0300 Subject: [PATCH] i965/fs: Add stub lowering pass for logical send-message opcodes. This pass will house ad-hoc lowering code for several send message-like virtual opcodes that will represent their logically independent arguments as separate instruction sources rather than as a single payload blob. This pass will basically just take the separate arguments that are supposed to be part of the payload and concatenate them to construct a message in the form required by the hardware. Virtual instructions in separate-source form will eventually allow some simplification of the visitor code and make several transformations easier like lowering SIMD16 instructions to SIMD8 algorithmically in cases where the hardware doesn't support the former natively. Reviewed-by: Jason Ekstrand --- src/mesa/drivers/dri/i965/brw_fs.cpp | 29 +++++++++++++++++++++++++++- src/mesa/drivers/dri/i965/brw_fs.h | 1 + 2 files changed, 29 insertions(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp b/src/mesa/drivers/dri/i965/brw_fs.cpp index 7d9b565d7f3..9d702a6c4b2 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp @@ -3198,6 +3198,30 @@ fs_visitor::lower_integer_multiplication() return progress; } +bool +fs_visitor::lower_logical_sends() +{ + bool progress = false; + + foreach_block_and_inst_safe(block, fs_inst, inst, cfg) { + const fs_builder ibld = bld.exec_all(inst->force_writemask_all) + .group(inst->exec_size, inst->force_sechalf) + .at(block, inst); + + switch (inst->opcode) { + default: + continue; + } + + progress = true; + } + + if (progress) + invalidate_live_intervals(); + + return progress; +} + void fs_visitor::dump_instructions() { @@ -3645,9 +3669,12 @@ fs_visitor::optimize() backend_shader::dump_instructions(filename); } - bool progress; + bool progress = false; int iteration = 0; int pass_num = 0; + + OPT(lower_logical_sends); + do { progress = false; pass_num = 0; diff --git a/src/mesa/drivers/dri/i965/brw_fs.h b/src/mesa/drivers/dri/i965/brw_fs.h index 283ee361d17..73559f4f15e 100644 --- a/src/mesa/drivers/dri/i965/brw_fs.h +++ b/src/mesa/drivers/dri/i965/brw_fs.h @@ -182,6 +182,7 @@ public: void no16(const char *msg); void lower_uniform_pull_constant_loads(); bool lower_load_payload(); + bool lower_logical_sends(); bool lower_integer_multiplication(); bool opt_combine_constants(); -- 2.30.2