diff options
Diffstat (limited to 'src/compiler/nir/nir_lower_packing.c')
| -rw-r--r-- | src/compiler/nir/nir_lower_packing.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_lower_packing.c b/src/compiler/nir/nir_lower_packing.c new file mode 100644 index 00000000000..ba9f4bc040a --- /dev/null +++ b/src/compiler/nir/nir_lower_packing.c @@ -0,0 +1,161 @@ +/* + * Copyright © 2015 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + */ + +#include "nir.h" +#include "nir_builder.h" + +/* + * lowers: + * + * packDouble2x32(foo) -> packDouble2x32Split(foo.x, foo.y) + * unpackDouble2x32(foo) -> vec2(unpackDouble2x32_x(foo), unpackDouble2x32_y(foo)) + * packInt2x32(foo) -> packInt2x32Split(foo.x, foo.y) + * unpackInt2x32(foo) -> vec2(unpackInt2x32_x(foo), unpackInt2x32_y(foo)) + */ + +static nir_ssa_def * +lower_pack_64_from_32(nir_builder *b, nir_ssa_def *src) +{ + return nir_pack_64_2x32_split(b, nir_channel(b, src, 0), + nir_channel(b, src, 1)); +} + +static nir_ssa_def * +lower_unpack_64_to_32(nir_builder *b, nir_ssa_def *src) +{ + return nir_vec2(b, nir_unpack_64_2x32_split_x(b, src), + nir_unpack_64_2x32_split_y(b, src)); +} + +static nir_ssa_def * +lower_pack_32_from_16(nir_builder *b, nir_ssa_def *src) +{ + return nir_pack_32_2x16_split(b, nir_channel(b, src, 0), + nir_channel(b, src, 1)); +} + +static nir_ssa_def * +lower_unpack_32_to_16(nir_builder *b, nir_ssa_def *src) +{ + return nir_vec2(b, nir_unpack_32_2x16_split_x(b, src), + nir_unpack_32_2x16_split_y(b, src)); +} + +static nir_ssa_def * +lower_pack_64_from_16(nir_builder *b, nir_ssa_def *src) +{ + nir_ssa_def *xy = nir_pack_32_2x16_split(b, nir_channel(b, src, 0), + nir_channel(b, src, 1)); + + nir_ssa_def *zw = nir_pack_32_2x16_split(b, nir_channel(b, src, 2), + nir_channel(b, src, 3)); + + return nir_pack_64_2x32_split(b, xy, zw); +} + +static nir_ssa_def * +lower_unpack_64_to_16(nir_builder *b, nir_ssa_def *src) +{ + nir_ssa_def *xy = nir_unpack_64_2x32_split_x(b, src); + nir_ssa_def *zw = nir_unpack_64_2x32_split_y(b, src); + + return nir_vec4(b, nir_unpack_32_2x16_split_x(b, xy), + nir_unpack_32_2x16_split_y(b, xy), + nir_unpack_32_2x16_split_x(b, zw), + nir_unpack_32_2x16_split_y(b, zw)); +} + +static bool +lower_pack_impl(nir_function_impl *impl) +{ + nir_builder b; + nir_builder_init(&b, impl); + bool progress = false; + + nir_foreach_block(block, impl) { + nir_foreach_instr_safe(instr, block) { + if (instr->type != nir_instr_type_alu) + continue; + + nir_alu_instr *alu_instr = (nir_alu_instr *) instr; + + if (alu_instr->op != nir_op_pack_64_2x32 && + alu_instr->op != nir_op_unpack_64_2x32 && + alu_instr->op != nir_op_pack_64_4x16 && + alu_instr->op != nir_op_unpack_64_4x16 && + alu_instr->op != nir_op_pack_32_2x16 && + alu_instr->op != nir_op_unpack_32_2x16) + continue; + + b.cursor = nir_before_instr(&alu_instr->instr); + + nir_ssa_def *src = nir_ssa_for_alu_src(&b, alu_instr, 0); + nir_ssa_def *dest; + + switch (alu_instr->op) { + case nir_op_pack_64_2x32: + dest = lower_pack_64_from_32(&b, src); + break; + case nir_op_unpack_64_2x32: + dest = lower_unpack_64_to_32(&b, src); + break; + case nir_op_pack_64_4x16: + dest = lower_pack_64_from_16(&b, src); + break; + case nir_op_unpack_64_4x16: + dest = lower_unpack_64_to_16(&b, src); + break; + case nir_op_pack_32_2x16: + dest = lower_pack_32_from_16(&b, src); + break; + case nir_op_unpack_32_2x16: + dest = lower_unpack_32_to_16(&b, src); + break; + default: + unreachable("Impossible opcode"); + } + + nir_ssa_def_rewrite_uses(&alu_instr->dest.dest.ssa, nir_src_for_ssa(dest)); + nir_instr_remove(&alu_instr->instr); + nir_metadata_preserve(impl, nir_metadata_block_index | + nir_metadata_dominance); + progress = true; + } + } + + return progress; +} + +bool +nir_lower_pack(nir_shader *shader) +{ + bool progress = false; + + nir_foreach_function(function, shader) { + if (function->impl) + progress |= lower_pack_impl(function->impl); + } + + return false; +} |