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radv: drop tess offchip layout for tcs.

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This removes the last TCS specific user sgpr.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie
2018-02-19 07:14:04 +00:00
parent ee31cff856
commit 010d055aae
4 changed files with 90 additions and 38 deletions
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116
src/amd/vulkan/radv_nir_to_llvm.c
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@@ -106,6 +106,7 @@ struct radv_shader_context {
uint64_t tcs_outputs_read;
uint32_t tcs_vertices_per_patch;
uint32_t tcs_num_inputs;
uint32_t tcs_num_patches;
};
enum radeon_llvm_calling_convention {
@@ -136,6 +137,46 @@ static LLVMValueRef get_rel_patch_id(struct radv_shader_context *ctx)
}
}
static unsigned
get_tcs_num_patches(struct radv_shader_context *ctx)
{
unsigned num_tcs_input_cp = ctx->options->key.tcs.input_vertices;
unsigned num_tcs_output_cp = ctx->tcs_vertices_per_patch;
uint32_t input_vertex_size = ctx->tcs_num_inputs * 16;
uint32_t input_patch_size = ctx->options->key.tcs.input_vertices * input_vertex_size;
uint32_t num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
uint32_t num_tcs_patch_outputs = util_last_bit64(ctx->shader_info->info.tcs.patch_outputs_written);
uint32_t output_vertex_size = num_tcs_outputs * 16;
uint32_t pervertex_output_patch_size = ctx->tcs_vertices_per_patch * output_vertex_size;
uint32_t output_patch_size = pervertex_output_patch_size + num_tcs_patch_outputs * 16;
unsigned num_patches;
unsigned hardware_lds_size;
/* Ensure that we only need one wave per SIMD so we don't need to check
* resource usage. Also ensures that the number of tcs in and out
* vertices per threadgroup are at most 256.
*/
num_patches = 64 / MAX2(num_tcs_input_cp, num_tcs_output_cp) * 4;
/* Make sure that the data fits in LDS. This assumes the shaders only
* use LDS for the inputs and outputs.
*/
hardware_lds_size = ctx->options->chip_class >= CIK ? 65536 : 32768;
num_patches = MIN2(num_patches, hardware_lds_size / (input_patch_size + output_patch_size));
/* Make sure the output data fits in the offchip buffer */
num_patches = MIN2(num_patches, (ctx->options->tess_offchip_block_dw_size * 4) / output_patch_size);
/* Not necessary for correctness, but improves performance. The
* specific value is taken from the proprietary driver.
*/
num_patches = MIN2(num_patches, 40);
/* SI bug workaround - limit LS-HS threadgroups to only one wave. */
if (ctx->options->chip_class == SI) {
unsigned one_wave = 64 / MAX2(num_tcs_input_cp, num_tcs_output_cp);
num_patches = MIN2(num_patches, one_wave);
}
return num_patches;
}
/* Tessellation shaders pass outputs to the next shader using LDS.
*
* LS outputs = TCS inputs
@@ -195,17 +236,17 @@ get_tcs_out_patch0_offset(struct radv_shader_context *ctx)
uint32_t input_vertex_size = ctx->tcs_num_inputs * 16;
uint32_t input_patch_size = ctx->options->key.tcs.input_vertices * input_vertex_size;
uint32_t output_patch0_offset = input_patch_size;
LLVMValueRef num_patches = ac_unpack_param(&ctx->ac, ctx->tcs_offchip_layout, 0, 9);
unsigned num_patches = ctx->tcs_num_patches;
output_patch0_offset *= num_patches;
output_patch0_offset /= 4;
return LLVMBuildMul(ctx->ac.builder,
num_patches,
LLVMConstInt(ctx->ac.i32, output_patch0_offset, false), "");
return LLVMConstInt(ctx->ac.i32, output_patch0_offset, false);
}
static LLVMValueRef
get_tcs_out_patch0_patch_data_offset(struct radv_shader_context *ctx)
{
assert (ctx->stage == MESA_SHADER_TESS_CTRL);
uint32_t input_vertex_size = ctx->tcs_num_inputs * 16;
uint32_t input_patch_size = ctx->options->key.tcs.input_vertices * input_vertex_size;
uint32_t output_patch0_offset = input_patch_size;
@@ -213,15 +254,12 @@ get_tcs_out_patch0_patch_data_offset(struct radv_shader_context *ctx)
uint32_t num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
uint32_t output_vertex_size = num_tcs_outputs * 16;
uint32_t pervertex_output_patch_size = ctx->tcs_vertices_per_patch * output_vertex_size;
LLVMValueRef num_patches = ac_unpack_param(&ctx->ac, ctx->tcs_offchip_layout, 0, 9);
unsigned num_patches = ctx->tcs_num_patches;
output_patch0_offset *= num_patches;
output_patch0_offset += pervertex_output_patch_size;
output_patch0_offset /= 4;
LLVMValueRef value = LLVMBuildMul(ctx->ac.builder,
num_patches,
LLVMConstInt(ctx->ac.i32, output_patch0_offset, false), "");
return LLVMBuildAdd(ctx->ac.builder,
value,
LLVMConstInt(ctx->ac.i32, pervertex_output_patch_size / 4, false), "");
return LLVMConstInt(ctx->ac.i32, output_patch0_offset, false);
}
static LLVMValueRef
@@ -493,7 +531,6 @@ static void allocate_user_sgprs(struct radv_shader_context *ctx,
if (previous_stage == MESA_SHADER_VERTEX)
user_sgpr_info->sgpr_count += count_vs_user_sgprs(ctx);
}
user_sgpr_info->sgpr_count += 1;
break;
case MESA_SHADER_TESS_EVAL:
user_sgpr_info->sgpr_count += 1;
@@ -789,8 +826,6 @@ static void create_function(struct radv_shader_context *ctx,
has_previous_stage,
previous_stage, &args);
add_arg(&args, ARG_SGPR, ctx->ac.i32,
&ctx->tcs_offchip_layout);
if (needs_view_index)
add_arg(&args, ARG_SGPR, ctx->ac.i32,
&ctx->abi.view_index);
@@ -808,8 +843,6 @@ static void create_function(struct radv_shader_context *ctx,
&user_sgpr_info, &args,
&desc_sets);
add_arg(&args, ARG_SGPR, ctx->ac.i32,
&ctx->tcs_offchip_layout);
if (needs_view_index)
add_arg(&args, ARG_SGPR, ctx->ac.i32,
&ctx->abi.view_index);
@@ -1018,7 +1051,6 @@ static void create_function(struct radv_shader_context *ctx,
case MESA_SHADER_TESS_CTRL:
set_vs_specific_input_locs(ctx, stage, has_previous_stage,
previous_stage, &user_sgpr_idx);
set_loc_shader(ctx, AC_UD_TCS_OFFCHIP_LAYOUT, &user_sgpr_idx, 1);
if (ctx->abi.view_index)
set_loc_shader(ctx, AC_UD_VIEW_INDEX, &user_sgpr_idx, 1);
break;
@@ -1115,30 +1147,58 @@ radv_load_resource(struct ac_shader_abi *abi, LLVMValueRef index,
*
* Note that every attribute has 4 components.
*/
static LLVMValueRef get_non_vertex_index_offset(struct radv_shader_context *ctx)
{
if (ctx->stage == MESA_SHADER_TESS_CTRL) {
uint32_t num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
uint32_t output_vertex_size = num_tcs_outputs * 16;
uint32_t pervertex_output_patch_size = ctx->tcs_vertices_per_patch * output_vertex_size;
uint32_t num_patches = ctx->tcs_num_patches;
return LLVMConstInt(ctx->ac.i32, pervertex_output_patch_size * num_patches, false);
} else
return ac_unpack_param(&ctx->ac, ctx->tcs_offchip_layout, 16, 16);
}
static LLVMValueRef calc_param_stride(struct radv_shader_context *ctx,
LLVMValueRef vertex_index)
{
LLVMValueRef param_stride;
if (ctx->stage == MESA_SHADER_TESS_CTRL) {
if (vertex_index)
param_stride = LLVMConstInt(ctx->ac.i32, ctx->tcs_vertices_per_patch * ctx->tcs_num_patches, false);
else
param_stride = LLVMConstInt(ctx->ac.i32, ctx->tcs_num_patches, false);
} else {
LLVMValueRef num_patches = ac_unpack_param(&ctx->ac, ctx->tcs_offchip_layout, 0, 9);
LLVMValueRef vertices_per_patch = LLVMConstInt(ctx->ac.i32, ctx->tcs_vertices_per_patch, false);
if (vertex_index)
param_stride = LLVMBuildMul(ctx->ac.builder, vertices_per_patch,
num_patches, "");
else
param_stride = num_patches;
}
return param_stride;
}
static LLVMValueRef get_tcs_tes_buffer_address(struct radv_shader_context *ctx,
LLVMValueRef vertex_index,
LLVMValueRef param_index)
{
LLVMValueRef base_addr, vertices_per_patch, num_patches;
LLVMValueRef base_addr;
LLVMValueRef param_stride, constant16;
LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);
vertices_per_patch = LLVMConstInt(ctx->ac.i32, ctx->tcs_vertices_per_patch, false);
num_patches = ac_unpack_param(&ctx->ac, ctx->tcs_offchip_layout, 0, 9);
LLVMValueRef vertices_per_patch = LLVMConstInt(ctx->ac.i32, ctx->tcs_vertices_per_patch, false);
constant16 = LLVMConstInt(ctx->ac.i32, 16, false);
param_stride = calc_param_stride(ctx, vertex_index);
if (vertex_index) {
base_addr = LLVMBuildMul(ctx->ac.builder, rel_patch_id,
vertices_per_patch, "");
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
vertex_index, "");
param_stride = LLVMBuildMul(ctx->ac.builder, vertices_per_patch,
num_patches, "");
} else {
base_addr = rel_patch_id;
param_stride = num_patches;
}
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
@@ -1148,8 +1208,7 @@ static LLVMValueRef get_tcs_tes_buffer_address(struct radv_shader_context *ctx,
base_addr = LLVMBuildMul(ctx->ac.builder, base_addr, constant16, "");
if (!vertex_index) {
LLVMValueRef patch_data_offset =
ac_unpack_param(&ctx->ac, ctx->tcs_offchip_layout, 16, 16);
LLVMValueRef patch_data_offset = get_non_vertex_index_offset(ctx);
base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
patch_data_offset, "");
@@ -3043,6 +3102,7 @@ LLVMModuleRef ac_translate_nir_to_llvm(LLVMTargetMachineRef tm,
ctx.tcs_num_inputs = ctx.options->key.tcs.num_inputs;
else
ctx.tcs_num_inputs = util_last_bit64(shader_info->info.vs.ls_outputs_written);
ctx.tcs_num_patches = get_tcs_num_patches(&ctx);
} else if (shaders[i]->info.stage == MESA_SHADER_TESS_EVAL) {
ctx.tes_primitive_mode = shaders[i]->info.tess.primitive_mode;
ctx.abi.load_tess_varyings = load_tes_input;