diff options
Diffstat (limited to 'src/freedreno/ir3/ir3_nir_lower_wide_load_store.c')
| -rw-r--r-- | src/freedreno/ir3/ir3_nir_lower_wide_load_store.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/freedreno/ir3/ir3_nir_lower_wide_load_store.c b/src/freedreno/ir3/ir3_nir_lower_wide_load_store.c new file mode 100644 index 00000000000..a3fb2eec7d9 --- /dev/null +++ b/src/freedreno/ir3/ir3_nir_lower_wide_load_store.c @@ -0,0 +1,118 @@ +/* + * Copyright © 2021 Google, Inc. + * + * 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 "ir3_nir.h" + + +/* + * Lowering for wide (larger than vec4) load/store + */ + +static bool +lower_wide_load_store_filter(const nir_instr *instr, const void *unused) +{ + (void)unused; + + if (instr->type != nir_instr_type_intrinsic) + return false; + + nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); + + if (is_intrinsic_store(intr->intrinsic)) + return nir_intrinsic_src_components(intr, 0) > 4; + + if (is_intrinsic_load(intr->intrinsic)) + return nir_intrinsic_dest_components(intr) > 4; + + return false; +} + +static nir_def * +lower_wide_load_store(nir_builder *b, nir_instr *instr, void *unused) +{ + (void)unused; + + nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); + + if (is_intrinsic_store(intr->intrinsic)) { + unsigned num_comp = nir_intrinsic_src_components(intr, 0); + unsigned wrmask = nir_intrinsic_write_mask(intr); + nir_def *val = intr->src[0].ssa; + nir_def *addr = intr->src[1].ssa; + + for (unsigned off = 0; off < num_comp; off += 4) { + unsigned c = MIN2(num_comp - off, 4); + nir_def *v = nir_channels(b, val, BITFIELD_MASK(c) << off); + + nir_intrinsic_instr *store = + nir_intrinsic_instr_create(b->shader, intr->intrinsic); + store->num_components = c; + store->src[0] = nir_src_for_ssa(v); + store->src[1] = nir_src_for_ssa(addr); + nir_intrinsic_set_align(store, nir_intrinsic_align(intr), 0); + nir_intrinsic_set_write_mask(store, (wrmask >> off) & 0xf); + nir_builder_instr_insert(b, &store->instr); + + addr = nir_iadd(b, + nir_imm_intN_t(b, (c * val->bit_size) / 8, addr->bit_size), + addr); + } + + return NIR_LOWER_INSTR_PROGRESS_REPLACE; + } else { + unsigned num_comp = nir_intrinsic_dest_components(intr); + unsigned bit_size = intr->def.bit_size; + nir_def *addr = intr->src[0].ssa; + nir_def *components[num_comp]; + + for (unsigned off = 0; off < num_comp;) { + unsigned c = MIN2(num_comp - off, 4); + + nir_intrinsic_instr *load = + nir_intrinsic_instr_create(b->shader, intr->intrinsic); + load->num_components = c; + load->src[0] = nir_src_for_ssa(addr); + nir_intrinsic_set_align(load, nir_intrinsic_align(intr), 0); + nir_def_init(&load->instr, &load->def, c, bit_size); + nir_builder_instr_insert(b, &load->instr); + + addr = nir_iadd(b, + nir_imm_intN_t(b, (c * bit_size) / 8, addr->bit_size), + addr); + + for (unsigned i = 0; i < c; i++) { + components[off++] = nir_channel(b, &load->def, i); + } + } + + return nir_build_alu_src_arr(b, nir_op_vec(num_comp), components); + } +} + +bool +ir3_nir_lower_wide_load_store(nir_shader *shader) +{ + return nir_shader_lower_instructions( + shader, lower_wide_load_store_filter, + lower_wide_load_store, NULL); +} |