#include "brw_nir.h"
#include "brw_vec4_tcs.h"
+#include "brw_fs.h"
namespace brw {
}
-void
-vec4_tcs_visitor::emit_nir_code()
-{
- if (key->program_string_id != 0) {
- /* We have a real application-supplied TCS, emit real code. */
- vec4_visitor::emit_nir_code();
- } else {
- /* There is no TCS; automatically generate a passthrough shader
- * that writes the API-specified default tessellation levels and
- * copies VS outputs to TES inputs.
- */
- uniforms = 2;
- uniform_size[0] = 1;
- uniform_size[1] = 1;
-
- uint64_t varyings = key->outputs_written;
-
- src_reg vertex_offset(this, glsl_type::uint_type);
- emit(MUL(dst_reg(vertex_offset), invocation_id,
- brw_imm_ud(prog_data->vue_map.num_per_vertex_slots)));
-
- while (varyings != 0) {
- const int varying = ffsll(varyings) - 1;
-
- unsigned in_offset = input_vue_map->varying_to_slot[varying];
- unsigned out_offset = prog_data->vue_map.varying_to_slot[varying];
- assert(out_offset >= 2);
-
- dst_reg val(this, glsl_type::vec4_type);
- emit_input_urb_read(val, invocation_id, in_offset, src_reg());
- emit_urb_write(src_reg(val), WRITEMASK_XYZW, out_offset,
- vertex_offset);
-
- varyings &= ~BITFIELD64_BIT(varying);
- }
-
- /* Only write the tessellation factors from invocation 0.
- * There's no point in making other threads do redundant work.
- */
- emit(CMP(dst_null_d(), invocation_id, brw_imm_ud(0),
- BRW_CONDITIONAL_EQ));
- emit(IF(BRW_PREDICATE_NORMAL));
- emit_urb_write(src_reg(UNIFORM, 0, glsl_type::vec4_type),
- WRITEMASK_XYZW, 0, src_reg());
- emit_urb_write(src_reg(UNIFORM, 1, glsl_type::vec4_type),
- WRITEMASK_XYZW, 1, src_reg());
- emit(BRW_OPCODE_ENDIF);
- }
-}
-
void
vec4_tcs_visitor::nir_setup_system_value_intrinsic(nir_intrinsic_instr *instr)
{
}
dst_reg *
-vec4_tcs_visitor::make_reg_for_system_value(int location, const glsl_type *type)
+vec4_tcs_visitor::make_reg_for_system_value(int location)
{
return NULL;
}
* we don't have stride in the vec4 world, nor UV immediates in
* align16, so we need an opcode to get invocation_id<0,4,0>.
*/
- emit(TCS_OPCODE_SRC0_010_IS_ZERO, dst_null_d(), invocation_id);
+ set_condmod(BRW_CONDITIONAL_Z,
+ emit(TCS_OPCODE_SRC0_010_IS_ZERO, dst_null_d(),
+ invocation_id));
emit(IF(BRW_PREDICATE_NORMAL));
for (unsigned i = 0; i < key->input_vertices; i += 2) {
/* If we have an odd number of input vertices, the last will be
vec4_tcs_visitor::emit_input_urb_read(const dst_reg &dst,
const src_reg &vertex_index,
unsigned base_offset,
+ unsigned first_component,
const src_reg &indirect_offset)
{
vec4_instruction *inst;
if (inst->offset == 0 && indirect_offset.file == BAD_FILE) {
emit(MOV(dst, swizzle(src_reg(temp), BRW_SWIZZLE_WWWW)));
} else {
- emit(MOV(dst, src_reg(temp)));
+ src_reg src = src_reg(temp);
+ src.swizzle = BRW_SWZ_COMP_INPUT(first_component);
+ emit(MOV(dst, src));
}
}
void
vec4_tcs_visitor::emit_output_urb_read(const dst_reg &dst,
unsigned base_offset,
+ unsigned first_component,
const src_reg &indirect_offset)
{
vec4_instruction *inst;
read->offset = base_offset;
read->mlen = 1;
read->base_mrf = -1;
+
+ if (first_component) {
+ src_reg src = src_reg(dst);
+ src.swizzle = BRW_SWZ_COMP_INPUT(first_component);
+ emit(MOV(dst, src));
+ }
}
void
inst->base_mrf = -1;
}
-static unsigned
-tesslevel_outer_components(GLenum tes_primitive_mode)
-{
- switch (tes_primitive_mode) {
- case GL_QUADS:
- return 4;
- case GL_TRIANGLES:
- return 3;
- case GL_ISOLINES:
- return 2;
- default:
- unreachable("Bogus tessellation domain");
- }
- return 0;
-}
-
-static unsigned
-tesslevel_inner_components(GLenum tes_primitive_mode)
-{
- switch (tes_primitive_mode) {
- case GL_QUADS:
- return 2;
- case GL_TRIANGLES:
- return 1;
- case GL_ISOLINES:
- return 0;
- default:
- unreachable("Bogus tessellation domain");
- }
- return 0;
-}
-
-/**
- * Given a normal .xyzw writemask, convert it to a writemask for a vector
- * that's stored backwards, i.e. .wzyx.
- */
-static unsigned
-writemask_for_backwards_vector(unsigned mask)
-{
- unsigned new_mask = 0;
-
- for (int i = 0; i < 4; i++)
- new_mask |= ((mask >> i) & 1) << (3 - i);
-
- return new_mask;
-}
-
void
vec4_tcs_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
{
dst_reg dst = get_nir_dest(instr->dest, BRW_REGISTER_TYPE_D);
dst.writemask = brw_writemask_for_size(instr->num_components);
- emit_input_urb_read(dst, vertex_index, imm_offset, indirect_offset);
+ emit_input_urb_read(dst, vertex_index, imm_offset,
+ nir_intrinsic_component(instr), indirect_offset);
break;
}
case nir_intrinsic_load_input:
case nir_intrinsic_load_output:
case nir_intrinsic_load_per_vertex_output: {
src_reg indirect_offset = get_indirect_offset(instr);
- unsigned imm_offset = instr->const_index[0];;
+ unsigned imm_offset = instr->const_index[0];
dst_reg dst = get_nir_dest(instr->dest, BRW_REGISTER_TYPE_D);
dst.writemask = brw_writemask_for_size(instr->num_components);
case GL_QUADS: {
/* DWords 3-2 (reversed); use offset 0 and WZYX swizzle. */
dst_reg tmp(this, glsl_type::vec4_type);
- emit_output_urb_read(tmp, 0, src_reg());
+ emit_output_urb_read(tmp, 0, 0, src_reg());
emit(MOV(writemask(dst, WRITEMASK_XY),
swizzle(src_reg(tmp), BRW_SWIZZLE_WZYX)));
break;
}
case GL_TRIANGLES:
/* DWord 4; use offset 1 but normal swizzle/writemask. */
- emit_output_urb_read(writemask(dst, WRITEMASK_X), 1, src_reg());
+ emit_output_urb_read(writemask(dst, WRITEMASK_X), 1, 0,
+ src_reg());
break;
case GL_ISOLINES:
/* All channels are undefined. */
}
} else if (imm_offset == 1 && indirect_offset.file == BAD_FILE) {
dst.type = BRW_REGISTER_TYPE_F;
+ unsigned swiz = BRW_SWIZZLE_WZYX;
/* This is a read of gl_TessLevelOuter[], which lives in the
* high 4 DWords of the Patch URB header, in reverse order.
dst.writemask = WRITEMASK_XYZ;
break;
case GL_ISOLINES:
+ /* Isolines are not reversed; swizzle .zw -> .xy */
+ swiz = BRW_SWIZZLE_ZWZW;
dst.writemask = WRITEMASK_XY;
return;
default:
}
dst_reg tmp(this, glsl_type::vec4_type);
- emit_output_urb_read(tmp, 1, src_reg());
- emit(MOV(dst, swizzle(src_reg(tmp), BRW_SWIZZLE_WZYX)));
+ emit_output_urb_read(tmp, 1, 0, src_reg());
+ emit(MOV(dst, swizzle(src_reg(tmp), swiz)));
} else {
- emit_output_urb_read(dst, imm_offset, indirect_offset);
+ emit_output_urb_read(dst, imm_offset, nir_intrinsic_component(instr),
+ indirect_offset);
}
break;
}
src_reg indirect_offset = get_indirect_offset(instr);
unsigned imm_offset = instr->const_index[0];
- if (imm_offset == 0 && indirect_offset.file == BAD_FILE) {
- value.type = BRW_REGISTER_TYPE_F;
+ /* The passthrough shader writes the whole patch header as two vec4s;
+ * skip all the gl_TessLevelInner/Outer swizzling.
+ */
+ if (indirect_offset.file == BAD_FILE && !is_passthrough_shader) {
+ if (imm_offset == 0) {
+ value.type = BRW_REGISTER_TYPE_F;
- mask &= (1 << tesslevel_inner_components(key->tes_primitive_mode)) - 1;
+ mask &=
+ (1 << tesslevel_inner_components(key->tes_primitive_mode)) - 1;
- /* This is a write to gl_TessLevelInner[], which lives in the
- * Patch URB header. The layout depends on the domain.
- */
- switch (key->tes_primitive_mode) {
- case GL_QUADS:
- /* gl_TessLevelInner[].xy lives at DWords 3-2 (reversed).
- * We use an XXYX swizzle to reverse put .xy in the .wz
- * channels, and use a .zw writemask.
+ /* This is a write to gl_TessLevelInner[], which lives in the
+ * Patch URB header. The layout depends on the domain.
*/
- swiz = BRW_SWIZZLE4(0, 0, 1, 0);
- mask = writemask_for_backwards_vector(mask);
- break;
- case GL_TRIANGLES:
- /* gl_TessLevelInner[].x lives at DWord 4, so we set the
- * writemask to X and bump the URB offset by 1.
+ switch (key->tes_primitive_mode) {
+ case GL_QUADS:
+ /* gl_TessLevelInner[].xy lives at DWords 3-2 (reversed).
+ * We use an XXYX swizzle to reverse put .xy in the .wz
+ * channels, and use a .zw writemask.
+ */
+ swiz = BRW_SWIZZLE4(0, 0, 1, 0);
+ mask = writemask_for_backwards_vector(mask);
+ break;
+ case GL_TRIANGLES:
+ /* gl_TessLevelInner[].x lives at DWord 4, so we set the
+ * writemask to X and bump the URB offset by 1.
+ */
+ imm_offset = 1;
+ break;
+ case GL_ISOLINES:
+ /* Skip; gl_TessLevelInner[] doesn't exist for isolines. */
+ return;
+ default:
+ unreachable("Bogus tessellation domain");
+ }
+ } else if (imm_offset == 1) {
+ value.type = BRW_REGISTER_TYPE_F;
+
+ mask &=
+ (1 << tesslevel_outer_components(key->tes_primitive_mode)) - 1;
+
+ /* This is a write to gl_TessLevelOuter[] which lives in the
+ * Patch URB Header at DWords 4-7. However, it's reversed, so
+ * instead of .xyzw we have .wzyx.
*/
- imm_offset = 1;
- break;
- case GL_ISOLINES:
- /* Skip; gl_TessLevelInner[] doesn't exist for isolines. */
- return;
- default:
- unreachable("Bogus tessellation domain");
+ if (key->tes_primitive_mode == GL_ISOLINES) {
+ /* Isolines .xy should be stored in .zw, in order. */
+ swiz = BRW_SWIZZLE4(0, 0, 0, 1);
+ mask <<= 2;
+ } else {
+ /* Other domains are reversed; store .wzyx instead of .xyzw. */
+ swiz = BRW_SWIZZLE_WZYX;
+ mask = writemask_for_backwards_vector(mask);
+ }
}
- } else if (imm_offset == 1 && indirect_offset.file == BAD_FILE) {
- value.type = BRW_REGISTER_TYPE_F;
-
- mask &= (1 << tesslevel_outer_components(key->tes_primitive_mode)) - 1;
+ }
- /* This is a write to gl_TessLevelOuter[] which lives in the
- * Patch URB Header at DWords 4-7. However, it's reversed, so
- * instead of .xyzw we have .wzyx.
- */
- swiz = BRW_SWIZZLE_WZYX;
- mask = writemask_for_backwards_vector(mask);
+ unsigned first_component = nir_intrinsic_component(instr);
+ if (first_component) {
+ assert(swiz == BRW_SWIZZLE_XYZW);
+ swiz = BRW_SWZ_COMP_OUTPUT(first_component);
+ mask = mask << first_component;
}
emit_urb_write(swizzle(value, swiz), mask,
unsigned *final_assembly_size,
char **error_str)
{
- const struct brw_device_info *devinfo = compiler->devinfo;
+ const struct gen_device_info *devinfo = compiler->devinfo;
struct brw_vue_prog_data *vue_prog_data = &prog_data->base;
const bool is_scalar = compiler->scalar_stage[MESA_SHADER_TESS_CTRL];
nir = brw_nir_apply_sampler_key(nir, devinfo, &key->tex, is_scalar);
brw_nir_lower_vue_inputs(nir, is_scalar, &input_vue_map);
brw_nir_lower_tcs_outputs(nir, &vue_prog_data->vue_map);
+ if (key->quads_workaround)
+ brw_nir_apply_tcs_quads_workaround(nir);
+
nir = brw_postprocess_nir(nir, compiler->devinfo, is_scalar);
- prog_data->instances = DIV_ROUND_UP(nir->info.tcs.vertices_out, 2);
+ if (is_scalar)
+ prog_data->instances = DIV_ROUND_UP(nir->info.tcs.vertices_out, 8);
+ else
+ prog_data->instances = DIV_ROUND_UP(nir->info.tcs.vertices_out, 2);
/* Compute URB entry size. The maximum allowed URB entry size is 32k.
* That divides up as follows:
brw_print_vue_map(stderr, &vue_prog_data->vue_map);
}
- vec4_tcs_visitor v(compiler, log_data, key, prog_data,
- nir, mem_ctx, shader_time_index, &input_vue_map);
- if (!v.run()) {
- if (error_str)
- *error_str = ralloc_strdup(mem_ctx, v.fail_msg);
- return NULL;
- }
+ if (is_scalar) {
+ fs_visitor v(compiler, log_data, mem_ctx, (void *) key,
+ &prog_data->base.base, NULL, nir, 8,
+ shader_time_index, &input_vue_map);
+ if (!v.run_tcs_single_patch()) {
+ if (error_str)
+ *error_str = ralloc_strdup(mem_ctx, v.fail_msg);
+ return NULL;
+ }
- if (unlikely(INTEL_DEBUG & DEBUG_TCS))
- v.dump_instructions();
+ prog_data->base.base.dispatch_grf_start_reg = v.payload.num_regs;
+ prog_data->base.dispatch_mode = DISPATCH_MODE_SIMD8;
+
+ fs_generator g(compiler, log_data, mem_ctx, (void *) key,
+ &prog_data->base.base, v.promoted_constants, false,
+ MESA_SHADER_TESS_CTRL);
+ if (unlikely(INTEL_DEBUG & DEBUG_TCS)) {
+ g.enable_debug(ralloc_asprintf(mem_ctx,
+ "%s tessellation control shader %s",
+ nir->info.label ? nir->info.label
+ : "unnamed",
+ nir->info.name));
+ }
+
+ g.generate_code(v.cfg, 8);
+
+ return g.get_assembly(final_assembly_size);
+ } else {
+ vec4_tcs_visitor v(compiler, log_data, key, prog_data,
+ nir, mem_ctx, shader_time_index, &input_vue_map);
+ if (!v.run()) {
+ if (error_str)
+ *error_str = ralloc_strdup(mem_ctx, v.fail_msg);
+ return NULL;
+ }
+
+ if (unlikely(INTEL_DEBUG & DEBUG_TCS))
+ v.dump_instructions();
- return brw_vec4_generate_assembly(compiler, log_data, mem_ctx, nir,
- &prog_data->base, v.cfg,
- final_assembly_size);
+
+ return brw_vec4_generate_assembly(compiler, log_data, mem_ctx, nir,
+ &prog_data->base, v.cfg,
+ final_assembly_size);
+ }
}
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