157 lines
5.0 KiB
C
157 lines
5.0 KiB
C
/*
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* Copyright © 2015 Intel Corporation
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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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*/
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#include "nir.h"
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#include "nir_builder.h"
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/*
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* lowers:
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*
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* packDouble2x32(foo) -> packDouble2x32Split(foo.x, foo.y)
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* unpackDouble2x32(foo) -> vec2(unpackDouble2x32_x(foo), unpackDouble2x32_y(foo))
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* packInt2x32(foo) -> packInt2x32Split(foo.x, foo.y)
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* unpackInt2x32(foo) -> vec2(unpackInt2x32_x(foo), unpackInt2x32_y(foo))
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*/
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static nir_ssa_def *
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lower_pack_64_from_32(nir_builder *b, nir_ssa_def *src)
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{
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return nir_pack_64_2x32_split(b, nir_channel(b, src, 0),
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nir_channel(b, src, 1));
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}
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static nir_ssa_def *
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lower_unpack_64_to_32(nir_builder *b, nir_ssa_def *src)
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{
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return nir_vec2(b, nir_unpack_64_2x32_split_x(b, src),
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nir_unpack_64_2x32_split_y(b, src));
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}
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static nir_ssa_def *
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lower_pack_32_from_16(nir_builder *b, nir_ssa_def *src)
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{
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return nir_pack_32_2x16_split(b, nir_channel(b, src, 0),
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nir_channel(b, src, 1));
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}
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static nir_ssa_def *
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lower_unpack_32_to_16(nir_builder *b, nir_ssa_def *src)
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{
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return nir_vec2(b, nir_unpack_32_2x16_split_x(b, src),
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nir_unpack_32_2x16_split_y(b, src));
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}
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static nir_ssa_def *
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lower_pack_64_from_16(nir_builder *b, nir_ssa_def *src)
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{
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nir_ssa_def *xy = nir_pack_32_2x16_split(b, nir_channel(b, src, 0),
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nir_channel(b, src, 1));
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nir_ssa_def *zw = nir_pack_32_2x16_split(b, nir_channel(b, src, 2),
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nir_channel(b, src, 3));
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return nir_pack_64_2x32_split(b, xy, zw);
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}
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static nir_ssa_def *
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lower_unpack_64_to_16(nir_builder *b, nir_ssa_def *src)
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{
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nir_ssa_def *xy = nir_unpack_64_2x32_split_x(b, src);
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nir_ssa_def *zw = nir_unpack_64_2x32_split_y(b, src);
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return nir_vec4(b, nir_unpack_32_2x16_split_x(b, xy),
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nir_unpack_32_2x16_split_y(b, xy),
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nir_unpack_32_2x16_split_x(b, zw),
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nir_unpack_32_2x16_split_y(b, zw));
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}
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static nir_ssa_def *
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lower_pack_32_from_8(nir_builder *b, nir_ssa_def *src)
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{
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return nir_pack_32_4x8_split(b, nir_channel(b, src, 0),
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nir_channel(b, src, 1),
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nir_channel(b, src, 2),
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nir_channel(b, src, 3));
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}
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static bool
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lower_pack_instr(nir_builder *b, nir_instr *instr, void *data)
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{
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if (instr->type != nir_instr_type_alu)
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return false;
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nir_alu_instr *alu_instr = (nir_alu_instr *) instr;
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if (alu_instr->op != nir_op_pack_64_2x32 &&
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alu_instr->op != nir_op_unpack_64_2x32 &&
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alu_instr->op != nir_op_pack_64_4x16 &&
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alu_instr->op != nir_op_unpack_64_4x16 &&
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alu_instr->op != nir_op_pack_32_2x16 &&
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alu_instr->op != nir_op_unpack_32_2x16 &&
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alu_instr->op != nir_op_pack_32_4x8)
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return false;
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b->cursor = nir_before_instr(&alu_instr->instr);
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nir_ssa_def *src = nir_ssa_for_alu_src(b, alu_instr, 0);
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nir_ssa_def *dest;
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switch (alu_instr->op) {
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case nir_op_pack_64_2x32:
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dest = lower_pack_64_from_32(b, src);
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break;
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case nir_op_unpack_64_2x32:
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dest = lower_unpack_64_to_32(b, src);
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break;
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case nir_op_pack_64_4x16:
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dest = lower_pack_64_from_16(b, src);
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break;
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case nir_op_unpack_64_4x16:
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dest = lower_unpack_64_to_16(b, src);
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break;
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case nir_op_pack_32_2x16:
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dest = lower_pack_32_from_16(b, src);
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break;
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case nir_op_unpack_32_2x16:
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dest = lower_unpack_32_to_16(b, src);
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break;
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case nir_op_pack_32_4x8:
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dest = lower_pack_32_from_8(b, src);
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break;
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default:
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unreachable("Impossible opcode");
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}
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nir_ssa_def_rewrite_uses(&alu_instr->dest.dest.ssa, dest);
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nir_instr_remove(&alu_instr->instr);
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return true;
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}
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bool
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nir_lower_pack(nir_shader *shader)
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{
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return nir_shader_instructions_pass(shader, lower_pack_instr,
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nir_metadata_block_index | nir_metadata_dominance, NULL);
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}
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