i965/fs: add a pass for lowering PACK opcodes
v2: Use subscript() instead of stride() (Curro) Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
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@ -26,6 +26,7 @@ i965_compiler_FILES = \
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brw_fs.h \
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brw_fs_live_variables.cpp \
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brw_fs_live_variables.h \
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brw_fs_lower_pack.cpp \
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brw_fs_nir.cpp \
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brw_fs_reg_allocate.cpp \
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brw_fs_register_coalesce.cpp \
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@ -5349,6 +5349,11 @@ fs_visitor::optimize()
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OPT(dead_code_eliminate);
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}
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if (OPT(lower_pack)) {
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OPT(register_coalesce);
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OPT(dead_code_eliminate);
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}
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OPT(opt_combine_constants);
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OPT(lower_integer_multiplication);
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@ -175,6 +175,7 @@ public:
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void no16(const char *msg);
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void lower_uniform_pull_constant_loads();
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bool lower_load_payload();
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bool lower_pack();
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bool lower_logical_sends();
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bool lower_integer_multiplication();
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bool lower_minmax();
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@ -0,0 +1,55 @@
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/*
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* Copyright © 2015 Connor Abbott
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "brw_fs.h"
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#include "brw_cfg.h"
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#include "brw_fs_builder.h"
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using namespace brw;
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bool
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fs_visitor::lower_pack()
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{
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bool progress = false;
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foreach_block_and_inst_safe(block, fs_inst, inst, cfg) {
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if (inst->opcode != FS_OPCODE_PACK)
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continue;
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assert(inst->dst.file == VGRF);
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assert(inst->saturate == false);
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fs_reg dst = inst->dst;
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const fs_builder ibld(this, block, inst);
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for (unsigned i = 0; i < inst->sources; i++)
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ibld.MOV(subscript(dst, inst->src[i].type, i), inst->src[i]);
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inst->remove(block);
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progress = true;
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}
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if (progress)
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invalidate_live_intervals();
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return progress;
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}
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