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radv: optimise compute shader grid size emission.

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Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2017-04-18 05:23:47 +10:00
parent 31174069d2
commit ec15e0d301
4 changed files with 29 additions and 13 deletions
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13
src/amd/common/ac_nir_to_llvm.c
View file

@ -604,7 +604,8 @@ static void create_function(struct nir_to_llvm_context *ctx)
switch (ctx->stage) {
case MESA_SHADER_COMPUTE:
arg_types[arg_idx++] = LLVMVectorType(ctx->i32, 3); /* grid size */
if (ctx->shader_info->info.cs.grid_components_used)
arg_types[arg_idx++] = LLVMVectorType(ctx->i32, ctx->shader_info->info.cs.grid_components_used); /* grid size */
user_sgpr_count = arg_idx;
arg_types[arg_idx++] = LLVMVectorType(ctx->i32, 3);
arg_types[arg_idx++] = ctx->i32;
@ -762,10 +763,12 @@ static void create_function(struct nir_to_llvm_context *ctx)
switch (ctx->stage) {
case MESA_SHADER_COMPUTE:
set_userdata_location_shader(ctx, AC_UD_CS_GRID_SIZE, user_sgpr_idx, 3);
user_sgpr_idx += 3;
ctx->num_work_groups =
LLVMGetParam(ctx->main_function, arg_idx++);
if (ctx->shader_info->info.cs.grid_components_used) {
set_userdata_location_shader(ctx, AC_UD_CS_GRID_SIZE, user_sgpr_idx, ctx->shader_info->info.cs.grid_components_used);
user_sgpr_idx += ctx->shader_info->info.cs.grid_components_used;
ctx->num_work_groups =
LLVMGetParam(ctx->main_function, arg_idx++);
}
ctx->workgroup_ids =
LLVMGetParam(ctx->main_function, arg_idx++);
ctx->tg_size =

3
src/amd/common/ac_shader_info.c
View file

@ -33,6 +33,9 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, struct ac_shader_info *info)
case nir_intrinsic_load_draw_id:
info->vs.needs_draw_id = true;
break;
case nir_intrinsic_load_num_work_groups:
info->cs.grid_components_used = instr->num_components;
break;
default:
break;
}

3
src/amd/common/ac_shader_info.h
View file

@ -35,6 +35,9 @@ struct ac_shader_info {
struct {
bool needs_sample_positions;
} ps;
struct {
uint8_t grid_components_used;
} cs;
};
void

23
src/amd/vulkan/radv_cmd_buffer.c
View file

@ -2781,11 +2781,14 @@ void radv_CmdDispatch(
MESA_SHADER_COMPUTE, AC_UD_CS_GRID_SIZE);
if (loc->sgpr_idx != -1) {
assert(!loc->indirect);
assert(loc->num_sgprs == 3);
radeon_set_sh_reg_seq(cmd_buffer->cs, R_00B900_COMPUTE_USER_DATA_0 + loc->sgpr_idx * 4, 3);
uint8_t grid_used = cmd_buffer->state.pipeline->shaders[MESA_SHADER_COMPUTE]->info.info.cs.grid_components_used;
assert(loc->num_sgprs == grid_used);
radeon_set_sh_reg_seq(cmd_buffer->cs, R_00B900_COMPUTE_USER_DATA_0 + loc->sgpr_idx * 4, grid_used);
radeon_emit(cmd_buffer->cs, x);
radeon_emit(cmd_buffer->cs, y);
radeon_emit(cmd_buffer->cs, z);
if (grid_used > 1)
radeon_emit(cmd_buffer->cs, y);
if (grid_used > 2)
radeon_emit(cmd_buffer->cs, z);
}
radeon_emit(cmd_buffer->cs, PKT3(PKT3_DISPATCH_DIRECT, 3, 0) |
@ -2817,7 +2820,8 @@ void radv_CmdDispatchIndirect(
struct ac_userdata_info *loc = radv_lookup_user_sgpr(cmd_buffer->state.compute_pipeline,
MESA_SHADER_COMPUTE, AC_UD_CS_GRID_SIZE);
if (loc->sgpr_idx != -1) {
for (unsigned i = 0; i < 3; ++i) {
uint8_t grid_used = cmd_buffer->state.pipeline->shaders[MESA_SHADER_COMPUTE]->info.info.cs.grid_components_used;
for (unsigned i = 0; i < grid_used; ++i) {
radeon_emit(cmd_buffer->cs, PKT3(PKT3_COPY_DATA, 4, 0));
radeon_emit(cmd_buffer->cs, COPY_DATA_SRC_SEL(COPY_DATA_MEM) |
COPY_DATA_DST_SEL(COPY_DATA_REG));
@ -2888,10 +2892,13 @@ void radv_unaligned_dispatch(
struct ac_userdata_info *loc = radv_lookup_user_sgpr(cmd_buffer->state.compute_pipeline,
MESA_SHADER_COMPUTE, AC_UD_CS_GRID_SIZE);
if (loc->sgpr_idx != -1) {
radeon_set_sh_reg_seq(cmd_buffer->cs, R_00B900_COMPUTE_USER_DATA_0 + loc->sgpr_idx * 4, 3);
uint8_t grid_used = cmd_buffer->state.pipeline->shaders[MESA_SHADER_COMPUTE]->info.info.cs.grid_components_used;
radeon_set_sh_reg_seq(cmd_buffer->cs, R_00B900_COMPUTE_USER_DATA_0 + loc->sgpr_idx * 4, grid_used);
radeon_emit(cmd_buffer->cs, blocks[0]);
radeon_emit(cmd_buffer->cs, blocks[1]);
radeon_emit(cmd_buffer->cs, blocks[2]);
if (grid_used > 1)
radeon_emit(cmd_buffer->cs, blocks[1]);
if (grid_used > 2)
radeon_emit(cmd_buffer->cs, blocks[2]);
}
radeon_emit(cmd_buffer->cs, PKT3(PKT3_DISPATCH_DIRECT, 3, 0) |
PKT3_SHADER_TYPE_S(1));