diff options
Diffstat (limited to 'src/gallium/drivers/vc4')
| -rw-r--r-- | src/gallium/drivers/vc4/Makefile.sources | 1 | ||||
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_nir_lower_io.c | 130 | ||||
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_program.c | 12 | ||||
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_qir.h | 1 |
4 files changed, 137 insertions, 7 deletions
diff --git a/src/gallium/drivers/vc4/Makefile.sources b/src/gallium/drivers/vc4/Makefile.sources index c24b01d4fbb..b09ffa60c39 100644 --- a/src/gallium/drivers/vc4/Makefile.sources +++ b/src/gallium/drivers/vc4/Makefile.sources @@ -19,6 +19,7 @@ C_SOURCES := \ vc4_fence.c \ vc4_formats.c \ vc4_job.c \ + vc4_nir_lower_io.c \ vc4_opt_algebraic.c \ vc4_opt_constant_folding.c \ vc4_opt_copy_propagation.c \ diff --git a/src/gallium/drivers/vc4/vc4_nir_lower_io.c b/src/gallium/drivers/vc4/vc4_nir_lower_io.c new file mode 100644 index 00000000000..43376888248 --- /dev/null +++ b/src/gallium/drivers/vc4/vc4_nir_lower_io.c @@ -0,0 +1,130 @@ +/* + * Copyright © 2015 Broadcom + * + * 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 "vc4_qir.h" +#include "tgsi/tgsi_info.h" +#include "glsl/nir/nir_builder.h" + +/** + * Walks the NIR generated by TGSI-to-NIR to lower its io intrinsics into + * something amenable to the VC4 architecture. + * + * Currently, it split outputs into scalars, and drops any non-position values + * in coordinate shaders. + */ + +static void +vc4_nir_lower_output(struct vc4_compile *c, nir_builder *b, + nir_intrinsic_instr *intr) +{ + nir_variable *output_var = NULL; + foreach_list_typed(nir_variable, var, node, &c->s->outputs) { + if (var->data.driver_location == intr->const_index[0]) { + output_var = var; + break; + } + } + assert(output_var); + unsigned semantic_name = output_var->data.location; + + if (c->stage == QSTAGE_COORD && + (semantic_name != TGSI_SEMANTIC_POSITION && + semantic_name != TGSI_SEMANTIC_PSIZE)) { + nir_instr_remove(&intr->instr); + return; + } + + /* All TGSI-to-NIR outputs are VEC4. */ + assert(intr->num_components == 4); + + nir_builder_insert_before_instr(b, &intr->instr); + + for (unsigned i = 0; i < intr->num_components; i++) { + nir_intrinsic_instr *intr_comp = + nir_intrinsic_instr_create(c->s, nir_intrinsic_store_output); + intr_comp->num_components = 1; + intr_comp->const_index[0] = intr->const_index[0] * 4 + i; + + assert(intr->src[0].is_ssa); + intr_comp->src[0] = nir_src_for_ssa(nir_swizzle(b, + intr->src[0].ssa, + &i, 1, false)); + nir_builder_instr_insert(b, &intr_comp->instr); + } + + nir_instr_remove(&intr->instr); +} + +static void +vc4_nir_lower_io_instr(struct vc4_compile *c, nir_builder *b, + struct nir_instr *instr) +{ + if (instr->type != nir_instr_type_intrinsic) + return; + nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr); + + switch (intr->intrinsic) { + case nir_intrinsic_store_output: + vc4_nir_lower_output(c, b, intr); + break; + + default: + break; + } +} + +static bool +vc4_nir_lower_io_block(nir_block *block, void *arg) +{ + struct vc4_compile *c = arg; + nir_function_impl *impl = + nir_cf_node_get_function(&block->cf_node); + + nir_builder b; + nir_builder_init(&b, impl); + + nir_foreach_instr_safe(block, instr) + vc4_nir_lower_io_instr(c, &b, instr); + + return true; +} + +static bool +vc4_nir_lower_io_impl(struct vc4_compile *c, nir_function_impl *impl) +{ + nir_foreach_block(impl, vc4_nir_lower_io_block, c); + + nir_metadata_preserve(impl, nir_metadata_block_index | + nir_metadata_dominance); + + return true; +} + +void +vc4_nir_lower_io(struct vc4_compile *c) +{ + nir_foreach_overload(c->s, overload) { + if (overload->impl) + vc4_nir_lower_io_impl(c, overload->impl); + } +} diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index a35b50cd39b..85bb1c48780 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -1895,13 +1895,10 @@ ntq_emit_intrinsic(struct vc4_compile *c, nir_intrinsic_instr *instr) break; case nir_intrinsic_store_output: - for (int i = 0; i < instr->num_components; i++) { - c->outputs[instr->const_index[0] * 4 + i] = - qir_MOV(c, ntq_get_src(c, instr->src[0], i)); - } - c->num_outputs = MAX2(c->num_outputs, - instr->const_index[0] * 4 + - instr->num_components + 1); + assert(instr->num_components == 1); + c->outputs[instr->const_index[0]] = + qir_MOV(c, ntq_get_src(c, instr->src[0], 0)); + c->num_outputs = MAX2(c->num_outputs, instr->const_index[0] + 1); break; case nir_intrinsic_discard: @@ -2102,6 +2099,7 @@ vc4_shader_ntq(struct vc4_context *vc4, enum qstage stage, c->s = tgsi_to_nir(tokens, &nir_options); nir_opt_global_to_local(c->s); nir_convert_to_ssa(c->s); + vc4_nir_lower_io(c); nir_lower_idiv(c->s); vc4_optimize_nir(c->s); diff --git a/src/gallium/drivers/vc4/vc4_qir.h b/src/gallium/drivers/vc4/vc4_qir.h index 2f1e261f880..7e1c95d5cab 100644 --- a/src/gallium/drivers/vc4/vc4_qir.h +++ b/src/gallium/drivers/vc4/vc4_qir.h @@ -409,6 +409,7 @@ bool qir_opt_cse(struct vc4_compile *c); bool qir_opt_dead_code(struct vc4_compile *c); bool qir_opt_small_immediates(struct vc4_compile *c); bool qir_opt_vpm_writes(struct vc4_compile *c); +void vc4_nir_lower_io(struct vc4_compile *c); void qir_lower_uniforms(struct vc4_compile *c); void qpu_schedule_instructions(struct vc4_compile *c); |