| /* |
| * Copyright © 2010 Intel Corporation |
| * |
| * 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 "compiler/glsl/ir.h" |
| #include "brw_fs.h" |
| #include "brw_fs_surface_builder.h" |
| #include "brw_nir.h" |
| #include "brw_program.h" |
| |
| using namespace brw; |
| using namespace brw::surface_access; |
| |
| void |
| fs_visitor::emit_nir_code() |
| { |
| /* emit the arrays used for inputs and outputs - load/store intrinsics will |
| * be converted to reads/writes of these arrays |
| */ |
| nir_setup_outputs(); |
| nir_setup_uniforms(); |
| nir_emit_system_values(); |
| |
| /* get the main function and emit it */ |
| nir_foreach_function(function, nir) { |
| assert(strcmp(function->name, "main") == 0); |
| assert(function->impl); |
| nir_emit_impl(function->impl); |
| } |
| } |
| |
| void |
| fs_visitor::nir_setup_single_output_varying(fs_reg *reg, |
| const glsl_type *type, |
| unsigned *location) |
| { |
| if (type->is_array() || type->is_matrix()) { |
| const struct glsl_type *elem_type = glsl_get_array_element(type); |
| const unsigned length = glsl_get_length(type); |
| |
| for (unsigned i = 0; i < length; i++) { |
| nir_setup_single_output_varying(reg, elem_type, location); |
| } |
| } else if (type->is_record()) { |
| for (unsigned i = 0; i < type->length; i++) { |
| const struct glsl_type *field_type = type->fields.structure[i].type; |
| nir_setup_single_output_varying(reg, field_type, location); |
| } |
| } else { |
| assert(type->is_scalar() || type->is_vector()); |
| unsigned num_iter = 1; |
| if (type->is_dual_slot()) |
| num_iter = 2; |
| for (unsigned count = 0; count < num_iter; count++) { |
| this->outputs[*location] = *reg; |
| *reg = offset(*reg, bld, 4); |
| (*location)++; |
| } |
| } |
| } |
| |
| void |
| fs_visitor::nir_setup_outputs() |
| { |
| if (stage == MESA_SHADER_TESS_CTRL || stage == MESA_SHADER_FRAGMENT) |
| return; |
| |
| nir_outputs = bld.vgrf(BRW_REGISTER_TYPE_F, nir->num_outputs); |
| |
| nir_foreach_variable(var, &nir->outputs) { |
| switch (stage) { |
| case MESA_SHADER_VERTEX: |
| case MESA_SHADER_TESS_EVAL: |
| case MESA_SHADER_GEOMETRY: { |
| fs_reg reg = offset(nir_outputs, bld, var->data.driver_location); |
| unsigned location = var->data.location; |
| nir_setup_single_output_varying(®, var->type, &location); |
| break; |
| } |
| default: |
| unreachable("unhandled shader stage"); |
| } |
| } |
| } |
| |
| void |
| fs_visitor::nir_setup_uniforms() |
| { |
| if (dispatch_width != min_dispatch_width) |
| return; |
| |
| uniforms = nir->num_uniforms / 4; |
| } |
| |
| static bool |
| emit_system_values_block(nir_block *block, fs_visitor *v) |
| { |
| fs_reg *reg; |
| |
| nir_foreach_instr(instr, block) { |
| if (instr->type != nir_instr_type_intrinsic) |
| continue; |
| |
| nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); |
| switch (intrin->intrinsic) { |
| case nir_intrinsic_load_vertex_id: |
| unreachable("should be lowered by lower_vertex_id()."); |
| |
| case nir_intrinsic_load_vertex_id_zero_base: |
| assert(v->stage == MESA_SHADER_VERTEX); |
| reg = &v->nir_system_values[SYSTEM_VALUE_VERTEX_ID_ZERO_BASE]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_vs_system_value(SYSTEM_VALUE_VERTEX_ID_ZERO_BASE); |
| break; |
| |
| case nir_intrinsic_load_base_vertex: |
| assert(v->stage == MESA_SHADER_VERTEX); |
| reg = &v->nir_system_values[SYSTEM_VALUE_BASE_VERTEX]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_vs_system_value(SYSTEM_VALUE_BASE_VERTEX); |
| break; |
| |
| case nir_intrinsic_load_instance_id: |
| assert(v->stage == MESA_SHADER_VERTEX); |
| reg = &v->nir_system_values[SYSTEM_VALUE_INSTANCE_ID]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_vs_system_value(SYSTEM_VALUE_INSTANCE_ID); |
| break; |
| |
| case nir_intrinsic_load_base_instance: |
| assert(v->stage == MESA_SHADER_VERTEX); |
| reg = &v->nir_system_values[SYSTEM_VALUE_BASE_INSTANCE]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_vs_system_value(SYSTEM_VALUE_BASE_INSTANCE); |
| break; |
| |
| case nir_intrinsic_load_draw_id: |
| assert(v->stage == MESA_SHADER_VERTEX); |
| reg = &v->nir_system_values[SYSTEM_VALUE_DRAW_ID]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_vs_system_value(SYSTEM_VALUE_DRAW_ID); |
| break; |
| |
| case nir_intrinsic_load_invocation_id: |
| if (v->stage == MESA_SHADER_TESS_CTRL) |
| break; |
| assert(v->stage == MESA_SHADER_GEOMETRY); |
| reg = &v->nir_system_values[SYSTEM_VALUE_INVOCATION_ID]; |
| if (reg->file == BAD_FILE) { |
| const fs_builder abld = v->bld.annotate("gl_InvocationID", NULL); |
| fs_reg g1(retype(brw_vec8_grf(1, 0), BRW_REGISTER_TYPE_UD)); |
| fs_reg iid = abld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| abld.SHR(iid, g1, brw_imm_ud(27u)); |
| *reg = iid; |
| } |
| break; |
| |
| case nir_intrinsic_load_sample_pos: |
| assert(v->stage == MESA_SHADER_FRAGMENT); |
| reg = &v->nir_system_values[SYSTEM_VALUE_SAMPLE_POS]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_samplepos_setup(); |
| break; |
| |
| case nir_intrinsic_load_sample_id: |
| assert(v->stage == MESA_SHADER_FRAGMENT); |
| reg = &v->nir_system_values[SYSTEM_VALUE_SAMPLE_ID]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_sampleid_setup(); |
| break; |
| |
| case nir_intrinsic_load_sample_mask_in: |
| assert(v->stage == MESA_SHADER_FRAGMENT); |
| assert(v->devinfo->gen >= 7); |
| reg = &v->nir_system_values[SYSTEM_VALUE_SAMPLE_MASK_IN]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_samplemaskin_setup(); |
| break; |
| |
| case nir_intrinsic_load_work_group_id: |
| assert(v->stage == MESA_SHADER_COMPUTE); |
| reg = &v->nir_system_values[SYSTEM_VALUE_WORK_GROUP_ID]; |
| if (reg->file == BAD_FILE) |
| *reg = *v->emit_cs_work_group_id_setup(); |
| break; |
| |
| case nir_intrinsic_load_helper_invocation: |
| assert(v->stage == MESA_SHADER_FRAGMENT); |
| reg = &v->nir_system_values[SYSTEM_VALUE_HELPER_INVOCATION]; |
| if (reg->file == BAD_FILE) { |
| const fs_builder abld = |
| v->bld.annotate("gl_HelperInvocation", NULL); |
| |
| /* On Gen6+ (gl_HelperInvocation is only exposed on Gen7+) the |
| * pixel mask is in g1.7 of the thread payload. |
| * |
| * We move the per-channel pixel enable bit to the low bit of each |
| * channel by shifting the byte containing the pixel mask by the |
| * vector immediate 0x76543210UV. |
| * |
| * The region of <1,8,0> reads only 1 byte (the pixel masks for |
| * subspans 0 and 1) in SIMD8 and an additional byte (the pixel |
| * masks for 2 and 3) in SIMD16. |
| */ |
| fs_reg shifted = abld.vgrf(BRW_REGISTER_TYPE_UW, 1); |
| abld.SHR(shifted, |
| stride(byte_offset(retype(brw_vec1_grf(1, 0), |
| BRW_REGISTER_TYPE_UB), 28), |
| 1, 8, 0), |
| brw_imm_v(0x76543210)); |
| |
| /* A set bit in the pixel mask means the channel is enabled, but |
| * that is the opposite of gl_HelperInvocation so we need to invert |
| * the mask. |
| * |
| * The negate source-modifier bit of logical instructions on Gen8+ |
| * performs 1's complement negation, so we can use that instead of |
| * a NOT instruction. |
| */ |
| fs_reg inverted = negate(shifted); |
| if (v->devinfo->gen < 8) { |
| inverted = abld.vgrf(BRW_REGISTER_TYPE_UW); |
| abld.NOT(inverted, shifted); |
| } |
| |
| /* We then resolve the 0/1 result to 0/~0 boolean values by ANDing |
| * with 1 and negating. |
| */ |
| fs_reg anded = abld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| abld.AND(anded, inverted, brw_imm_uw(1)); |
| |
| fs_reg dst = abld.vgrf(BRW_REGISTER_TYPE_D, 1); |
| abld.MOV(dst, negate(retype(anded, BRW_REGISTER_TYPE_D))); |
| *reg = dst; |
| } |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| return true; |
| } |
| |
| void |
| fs_visitor::nir_emit_system_values() |
| { |
| nir_system_values = ralloc_array(mem_ctx, fs_reg, SYSTEM_VALUE_MAX); |
| for (unsigned i = 0; i < SYSTEM_VALUE_MAX; i++) { |
| nir_system_values[i] = fs_reg(); |
| } |
| |
| nir_foreach_function(function, nir) { |
| assert(strcmp(function->name, "main") == 0); |
| assert(function->impl); |
| nir_foreach_block(block, function->impl) { |
| emit_system_values_block(block, this); |
| } |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_impl(nir_function_impl *impl) |
| { |
| nir_locals = ralloc_array(mem_ctx, fs_reg, impl->reg_alloc); |
| for (unsigned i = 0; i < impl->reg_alloc; i++) { |
| nir_locals[i] = fs_reg(); |
| } |
| |
| foreach_list_typed(nir_register, reg, node, &impl->registers) { |
| unsigned array_elems = |
| reg->num_array_elems == 0 ? 1 : reg->num_array_elems; |
| unsigned size = array_elems * reg->num_components; |
| const brw_reg_type reg_type = |
| reg->bit_size == 32 ? BRW_REGISTER_TYPE_F : BRW_REGISTER_TYPE_DF; |
| nir_locals[reg->index] = bld.vgrf(reg_type, size); |
| } |
| |
| nir_ssa_values = reralloc(mem_ctx, nir_ssa_values, fs_reg, |
| impl->ssa_alloc); |
| |
| nir_emit_cf_list(&impl->body); |
| } |
| |
| void |
| fs_visitor::nir_emit_cf_list(exec_list *list) |
| { |
| exec_list_validate(list); |
| foreach_list_typed(nir_cf_node, node, node, list) { |
| switch (node->type) { |
| case nir_cf_node_if: |
| nir_emit_if(nir_cf_node_as_if(node)); |
| break; |
| |
| case nir_cf_node_loop: |
| nir_emit_loop(nir_cf_node_as_loop(node)); |
| break; |
| |
| case nir_cf_node_block: |
| nir_emit_block(nir_cf_node_as_block(node)); |
| break; |
| |
| default: |
| unreachable("Invalid CFG node block"); |
| } |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_if(nir_if *if_stmt) |
| { |
| /* first, put the condition into f0 */ |
| fs_inst *inst = bld.MOV(bld.null_reg_d(), |
| retype(get_nir_src(if_stmt->condition), |
| BRW_REGISTER_TYPE_D)); |
| inst->conditional_mod = BRW_CONDITIONAL_NZ; |
| |
| bld.IF(BRW_PREDICATE_NORMAL); |
| |
| nir_emit_cf_list(&if_stmt->then_list); |
| |
| /* note: if the else is empty, dead CF elimination will remove it */ |
| bld.emit(BRW_OPCODE_ELSE); |
| |
| nir_emit_cf_list(&if_stmt->else_list); |
| |
| bld.emit(BRW_OPCODE_ENDIF); |
| } |
| |
| void |
| fs_visitor::nir_emit_loop(nir_loop *loop) |
| { |
| bld.emit(BRW_OPCODE_DO); |
| |
| nir_emit_cf_list(&loop->body); |
| |
| bld.emit(BRW_OPCODE_WHILE); |
| } |
| |
| void |
| fs_visitor::nir_emit_block(nir_block *block) |
| { |
| nir_foreach_instr(instr, block) { |
| nir_emit_instr(instr); |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_instr(nir_instr *instr) |
| { |
| const fs_builder abld = bld.annotate(NULL, instr); |
| |
| switch (instr->type) { |
| case nir_instr_type_alu: |
| nir_emit_alu(abld, nir_instr_as_alu(instr)); |
| break; |
| |
| case nir_instr_type_intrinsic: |
| switch (stage) { |
| case MESA_SHADER_VERTEX: |
| nir_emit_vs_intrinsic(abld, nir_instr_as_intrinsic(instr)); |
| break; |
| case MESA_SHADER_TESS_CTRL: |
| nir_emit_tcs_intrinsic(abld, nir_instr_as_intrinsic(instr)); |
| break; |
| case MESA_SHADER_TESS_EVAL: |
| nir_emit_tes_intrinsic(abld, nir_instr_as_intrinsic(instr)); |
| break; |
| case MESA_SHADER_GEOMETRY: |
| nir_emit_gs_intrinsic(abld, nir_instr_as_intrinsic(instr)); |
| break; |
| case MESA_SHADER_FRAGMENT: |
| nir_emit_fs_intrinsic(abld, nir_instr_as_intrinsic(instr)); |
| break; |
| case MESA_SHADER_COMPUTE: |
| nir_emit_cs_intrinsic(abld, nir_instr_as_intrinsic(instr)); |
| break; |
| default: |
| unreachable("unsupported shader stage"); |
| } |
| break; |
| |
| case nir_instr_type_tex: |
| nir_emit_texture(abld, nir_instr_as_tex(instr)); |
| break; |
| |
| case nir_instr_type_load_const: |
| nir_emit_load_const(abld, nir_instr_as_load_const(instr)); |
| break; |
| |
| case nir_instr_type_ssa_undef: |
| /* We create a new VGRF for undefs on every use (by handling |
| * them in get_nir_src()), rather than for each definition. |
| * This helps register coalescing eliminate MOVs from undef. |
| */ |
| break; |
| |
| case nir_instr_type_jump: |
| nir_emit_jump(abld, nir_instr_as_jump(instr)); |
| break; |
| |
| default: |
| unreachable("unknown instruction type"); |
| } |
| } |
| |
| /** |
| * Recognizes a parent instruction of nir_op_extract_* and changes the type to |
| * match instr. |
| */ |
| bool |
| fs_visitor::optimize_extract_to_float(nir_alu_instr *instr, |
| const fs_reg &result) |
| { |
| if (!instr->src[0].src.is_ssa || |
| !instr->src[0].src.ssa->parent_instr) |
| return false; |
| |
| if (instr->src[0].src.ssa->parent_instr->type != nir_instr_type_alu) |
| return false; |
| |
| nir_alu_instr *src0 = |
| nir_instr_as_alu(instr->src[0].src.ssa->parent_instr); |
| |
| if (src0->op != nir_op_extract_u8 && src0->op != nir_op_extract_u16 && |
| src0->op != nir_op_extract_i8 && src0->op != nir_op_extract_i16) |
| return false; |
| |
| nir_const_value *element = nir_src_as_const_value(src0->src[1].src); |
| assert(element != NULL); |
| |
| /* Element type to extract.*/ |
| const brw_reg_type type = brw_int_type( |
| src0->op == nir_op_extract_u16 || src0->op == nir_op_extract_i16 ? 2 : 1, |
| src0->op == nir_op_extract_i16 || src0->op == nir_op_extract_i8); |
| |
| fs_reg op0 = get_nir_src(src0->src[0].src); |
| op0.type = brw_type_for_nir_type( |
| (nir_alu_type)(nir_op_infos[src0->op].input_types[0] | |
| nir_src_bit_size(src0->src[0].src))); |
| op0 = offset(op0, bld, src0->src[0].swizzle[0]); |
| |
| set_saturate(instr->dest.saturate, |
| bld.MOV(result, subscript(op0, type, element->u32[0]))); |
| return true; |
| } |
| |
| bool |
| fs_visitor::optimize_frontfacing_ternary(nir_alu_instr *instr, |
| const fs_reg &result) |
| { |
| if (!instr->src[0].src.is_ssa || |
| instr->src[0].src.ssa->parent_instr->type != nir_instr_type_intrinsic) |
| return false; |
| |
| nir_intrinsic_instr *src0 = |
| nir_instr_as_intrinsic(instr->src[0].src.ssa->parent_instr); |
| |
| if (src0->intrinsic != nir_intrinsic_load_front_face) |
| return false; |
| |
| nir_const_value *value1 = nir_src_as_const_value(instr->src[1].src); |
| if (!value1 || fabsf(value1->f32[0]) != 1.0f) |
| return false; |
| |
| nir_const_value *value2 = nir_src_as_const_value(instr->src[2].src); |
| if (!value2 || fabsf(value2->f32[0]) != 1.0f) |
| return false; |
| |
| fs_reg tmp = vgrf(glsl_type::int_type); |
| |
| if (devinfo->gen >= 6) { |
| /* Bit 15 of g0.0 is 0 if the polygon is front facing. */ |
| fs_reg g0 = fs_reg(retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_W)); |
| |
| /* For (gl_FrontFacing ? 1.0 : -1.0), emit: |
| * |
| * or(8) tmp.1<2>W g0.0<0,1,0>W 0x00003f80W |
| * and(8) dst<1>D tmp<8,8,1>D 0xbf800000D |
| * |
| * and negate g0.0<0,1,0>W for (gl_FrontFacing ? -1.0 : 1.0). |
| * |
| * This negation looks like it's safe in practice, because bits 0:4 will |
| * surely be TRIANGLES |
| */ |
| |
| if (value1->f32[0] == -1.0f) { |
| g0.negate = true; |
| } |
| |
| tmp.type = BRW_REGISTER_TYPE_W; |
| tmp.subreg_offset = 2; |
| tmp.stride = 2; |
| |
| bld.OR(tmp, g0, brw_imm_uw(0x3f80)); |
| |
| tmp.type = BRW_REGISTER_TYPE_D; |
| tmp.subreg_offset = 0; |
| tmp.stride = 1; |
| } else { |
| /* Bit 31 of g1.6 is 0 if the polygon is front facing. */ |
| fs_reg g1_6 = fs_reg(retype(brw_vec1_grf(1, 6), BRW_REGISTER_TYPE_D)); |
| |
| /* For (gl_FrontFacing ? 1.0 : -1.0), emit: |
| * |
| * or(8) tmp<1>D g1.6<0,1,0>D 0x3f800000D |
| * and(8) dst<1>D tmp<8,8,1>D 0xbf800000D |
| * |
| * and negate g1.6<0,1,0>D for (gl_FrontFacing ? -1.0 : 1.0). |
| * |
| * This negation looks like it's safe in practice, because bits 0:4 will |
| * surely be TRIANGLES |
| */ |
| |
| if (value1->f32[0] == -1.0f) { |
| g1_6.negate = true; |
| } |
| |
| bld.OR(tmp, g1_6, brw_imm_d(0x3f800000)); |
| } |
| bld.AND(retype(result, BRW_REGISTER_TYPE_D), tmp, brw_imm_d(0xbf800000)); |
| |
| return true; |
| } |
| |
| static void |
| emit_find_msb_using_lzd(const fs_builder &bld, |
| const fs_reg &result, |
| const fs_reg &src, |
| bool is_signed) |
| { |
| fs_inst *inst; |
| fs_reg temp = src; |
| |
| if (is_signed) { |
| /* LZD of an absolute value source almost always does the right |
| * thing. There are two problem values: |
| * |
| * * 0x80000000. Since abs(0x80000000) == 0x80000000, LZD returns |
| * 0. However, findMSB(int(0x80000000)) == 30. |
| * |
| * * 0xffffffff. Since abs(0xffffffff) == 1, LZD returns |
| * 31. Section 8.8 (Integer Functions) of the GLSL 4.50 spec says: |
| * |
| * For a value of zero or negative one, -1 will be returned. |
| * |
| * * Negative powers of two. LZD(abs(-(1<<x))) returns x, but |
| * findMSB(-(1<<x)) should return x-1. |
| * |
| * For all negative number cases, including 0x80000000 and |
| * 0xffffffff, the correct value is obtained from LZD if instead of |
| * negating the (already negative) value the logical-not is used. A |
| * conditonal logical-not can be achieved in two instructions. |
| */ |
| temp = bld.vgrf(BRW_REGISTER_TYPE_D); |
| |
| bld.ASR(temp, src, brw_imm_d(31)); |
| bld.XOR(temp, temp, src); |
| } |
| |
| bld.LZD(retype(result, BRW_REGISTER_TYPE_UD), |
| retype(temp, BRW_REGISTER_TYPE_UD)); |
| |
| /* LZD counts from the MSB side, while GLSL's findMSB() wants the count |
| * from the LSB side. Subtract the result from 31 to convert the MSB |
| * count into an LSB count. If no bits are set, LZD will return 32. |
| * 31-32 = -1, which is exactly what findMSB() is supposed to return. |
| */ |
| inst = bld.ADD(result, retype(result, BRW_REGISTER_TYPE_D), brw_imm_d(31)); |
| inst->src[0].negate = true; |
| } |
| |
| void |
| fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr) |
| { |
| struct brw_wm_prog_key *fs_key = (struct brw_wm_prog_key *) this->key; |
| fs_inst *inst; |
| |
| fs_reg result = get_nir_dest(instr->dest.dest); |
| result.type = brw_type_for_nir_type( |
| (nir_alu_type)(nir_op_infos[instr->op].output_type | |
| nir_dest_bit_size(instr->dest.dest))); |
| |
| fs_reg op[4]; |
| for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) { |
| op[i] = get_nir_src(instr->src[i].src); |
| op[i].type = brw_type_for_nir_type( |
| (nir_alu_type)(nir_op_infos[instr->op].input_types[i] | |
| nir_src_bit_size(instr->src[i].src))); |
| op[i].abs = instr->src[i].abs; |
| op[i].negate = instr->src[i].negate; |
| } |
| |
| /* We get a bunch of mov's out of the from_ssa pass and they may still |
| * be vectorized. We'll handle them as a special-case. We'll also |
| * handle vecN here because it's basically the same thing. |
| */ |
| switch (instr->op) { |
| case nir_op_imov: |
| case nir_op_fmov: |
| case nir_op_vec2: |
| case nir_op_vec3: |
| case nir_op_vec4: { |
| fs_reg temp = result; |
| bool need_extra_copy = false; |
| for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) { |
| if (!instr->src[i].src.is_ssa && |
| instr->dest.dest.reg.reg == instr->src[i].src.reg.reg) { |
| need_extra_copy = true; |
| temp = bld.vgrf(result.type, 4); |
| break; |
| } |
| } |
| |
| for (unsigned i = 0; i < 4; i++) { |
| if (!(instr->dest.write_mask & (1 << i))) |
| continue; |
| |
| if (instr->op == nir_op_imov || instr->op == nir_op_fmov) { |
| inst = bld.MOV(offset(temp, bld, i), |
| offset(op[0], bld, instr->src[0].swizzle[i])); |
| } else { |
| inst = bld.MOV(offset(temp, bld, i), |
| offset(op[i], bld, instr->src[i].swizzle[0])); |
| } |
| inst->saturate = instr->dest.saturate; |
| } |
| |
| /* In this case the source and destination registers were the same, |
| * so we need to insert an extra set of moves in order to deal with |
| * any swizzling. |
| */ |
| if (need_extra_copy) { |
| for (unsigned i = 0; i < 4; i++) { |
| if (!(instr->dest.write_mask & (1 << i))) |
| continue; |
| |
| bld.MOV(offset(result, bld, i), offset(temp, bld, i)); |
| } |
| } |
| return; |
| } |
| default: |
| break; |
| } |
| |
| /* At this point, we have dealt with any instruction that operates on |
| * more than a single channel. Therefore, we can just adjust the source |
| * and destination registers for that channel and emit the instruction. |
| */ |
| unsigned channel = 0; |
| if (nir_op_infos[instr->op].output_size == 0) { |
| /* Since NIR is doing the scalarizing for us, we should only ever see |
| * vectorized operations with a single channel. |
| */ |
| assert(_mesa_bitcount(instr->dest.write_mask) == 1); |
| channel = ffs(instr->dest.write_mask) - 1; |
| |
| result = offset(result, bld, channel); |
| } |
| |
| for (unsigned i = 0; i < nir_op_infos[instr->op].num_inputs; i++) { |
| assert(nir_op_infos[instr->op].input_sizes[i] < 2); |
| op[i] = offset(op[i], bld, instr->src[i].swizzle[channel]); |
| } |
| |
| switch (instr->op) { |
| case nir_op_i2f: |
| case nir_op_u2f: |
| if (optimize_extract_to_float(instr, result)) |
| return; |
| inst = bld.MOV(result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_f2d: |
| case nir_op_i2d: |
| case nir_op_u2d: |
| /* CHV PRM, vol07, 3D Media GPGPU Engine, Register Region Restrictions: |
| * |
| * "When source or destination is 64b (...), regioning in Align1 |
| * must follow these rules: |
| * |
| * 1. Source and destination horizontal stride must be aligned to |
| * the same qword. |
| * (...)" |
| * |
| * This means that 32-bit to 64-bit conversions need to have the 32-bit |
| * data elements aligned to 64-bit. This restriction does not apply to |
| * BDW and later. |
| */ |
| if (devinfo->is_cherryview || devinfo->is_broxton) { |
| fs_reg tmp = bld.vgrf(result.type, 1); |
| tmp = subscript(tmp, op[0].type, 0); |
| inst = bld.MOV(tmp, op[0]); |
| inst = bld.MOV(result, tmp); |
| inst->saturate = instr->dest.saturate; |
| break; |
| } |
| /* fallthrough */ |
| case nir_op_d2f: |
| case nir_op_d2i: |
| case nir_op_d2u: |
| inst = bld.MOV(result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_f2i: |
| case nir_op_f2u: |
| bld.MOV(result, op[0]); |
| break; |
| |
| case nir_op_fsign: { |
| if (type_sz(op[0].type) < 8) { |
| /* AND(val, 0x80000000) gives the sign bit. |
| * |
| * Predicated OR ORs 1.0 (0x3f800000) with the sign bit if val is not |
| * zero. |
| */ |
| bld.CMP(bld.null_reg_f(), op[0], brw_imm_f(0.0f), BRW_CONDITIONAL_NZ); |
| |
| fs_reg result_int = retype(result, BRW_REGISTER_TYPE_UD); |
| op[0].type = BRW_REGISTER_TYPE_UD; |
| result.type = BRW_REGISTER_TYPE_UD; |
| bld.AND(result_int, op[0], brw_imm_ud(0x80000000u)); |
| |
| inst = bld.OR(result_int, result_int, brw_imm_ud(0x3f800000u)); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| if (instr->dest.saturate) { |
| inst = bld.MOV(result, result); |
| inst->saturate = true; |
| } |
| } else { |
| /* For doubles we do the same but we need to consider: |
| * |
| * - 2-src instructions can't operate with 64-bit immediates |
| * - The sign is encoded in the high 32-bit of each DF |
| * - CMP with DF requires special handling in SIMD16 |
| * - We need to produce a DF result. |
| */ |
| |
| /* 2-src instructions can't have 64-bit immediates, so put 0.0 in |
| * a register and compare with that. |
| */ |
| fs_reg tmp = vgrf(glsl_type::double_type); |
| bld.MOV(tmp, setup_imm_df(bld, 0.0)); |
| |
| /* A direct DF CMP using the flag register (null dst) won't work in |
| * SIMD16 because the CMP will be split in two by lower_simd_width, |
| * resulting in two CMP instructions with the same dst (NULL), |
| * leading to dead code elimination of the first one. In SIMD8, |
| * however, there is no need to split the CMP and we can save some |
| * work. |
| */ |
| fs_reg dst_tmp = vgrf(glsl_type::double_type); |
| bld.CMP(dst_tmp, op[0], tmp, BRW_CONDITIONAL_NZ); |
| |
| /* In SIMD16 we want to avoid using a NULL dst register with DF CMP, |
| * so we store the result of the comparison in a vgrf instead and |
| * then we generate a UD comparison from that that won't have to |
| * be split by lower_simd_width. This is what NIR does to handle |
| * double comparisons in the general case. |
| */ |
| if (bld.dispatch_width() == 16 ) { |
| fs_reg dst_tmp_ud = retype(dst_tmp, BRW_REGISTER_TYPE_UD); |
| bld.MOV(dst_tmp_ud, subscript(dst_tmp, BRW_REGISTER_TYPE_UD, 0)); |
| bld.CMP(bld.null_reg_ud(), |
| dst_tmp_ud, brw_imm_ud(0), BRW_CONDITIONAL_NZ); |
| } |
| |
| /* Get the high 32-bit of each double component where the sign is */ |
| fs_reg result_int = retype(result, BRW_REGISTER_TYPE_UD); |
| bld.MOV(result_int, subscript(op[0], BRW_REGISTER_TYPE_UD, 1)); |
| |
| /* Get the sign bit */ |
| bld.AND(result_int, result_int, brw_imm_ud(0x80000000u)); |
| |
| /* Add 1.0 to the sign, predicated to skip the case of op[0] == 0.0 */ |
| inst = bld.OR(result_int, result_int, brw_imm_ud(0x3f800000u)); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| |
| /* Convert from 32-bit float to 64-bit double */ |
| result.type = BRW_REGISTER_TYPE_DF; |
| inst = bld.MOV(result, retype(result_int, BRW_REGISTER_TYPE_F)); |
| |
| if (instr->dest.saturate) { |
| inst = bld.MOV(result, result); |
| inst->saturate = true; |
| } |
| } |
| break; |
| } |
| |
| case nir_op_isign: |
| /* ASR(val, 31) -> negative val generates 0xffffffff (signed -1). |
| * -> non-negative val generates 0x00000000. |
| * Predicated OR sets 1 if val is positive. |
| */ |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.CMP(bld.null_reg_d(), op[0], brw_imm_d(0), BRW_CONDITIONAL_G); |
| bld.ASR(result, op[0], brw_imm_d(31)); |
| inst = bld.OR(result, result, brw_imm_d(1)); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| break; |
| |
| case nir_op_frcp: |
| inst = bld.emit(SHADER_OPCODE_RCP, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_fexp2: |
| inst = bld.emit(SHADER_OPCODE_EXP2, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_flog2: |
| inst = bld.emit(SHADER_OPCODE_LOG2, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_fsin: |
| inst = bld.emit(SHADER_OPCODE_SIN, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_fcos: |
| inst = bld.emit(SHADER_OPCODE_COS, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_fddx: |
| if (fs_key->high_quality_derivatives) { |
| inst = bld.emit(FS_OPCODE_DDX_FINE, result, op[0]); |
| } else { |
| inst = bld.emit(FS_OPCODE_DDX_COARSE, result, op[0]); |
| } |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_fddx_fine: |
| inst = bld.emit(FS_OPCODE_DDX_FINE, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_fddx_coarse: |
| inst = bld.emit(FS_OPCODE_DDX_COARSE, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_fddy: |
| if (fs_key->high_quality_derivatives) { |
| inst = bld.emit(FS_OPCODE_DDY_FINE, result, op[0]); |
| } else { |
| inst = bld.emit(FS_OPCODE_DDY_COARSE, result, op[0]); |
| } |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_fddy_fine: |
| inst = bld.emit(FS_OPCODE_DDY_FINE, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_fddy_coarse: |
| inst = bld.emit(FS_OPCODE_DDY_COARSE, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_iadd: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| case nir_op_fadd: |
| inst = bld.ADD(result, op[0], op[1]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_fmul: |
| inst = bld.MUL(result, op[0], op[1]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_imul: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.MUL(result, op[0], op[1]); |
| break; |
| |
| case nir_op_imul_high: |
| case nir_op_umul_high: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.emit(SHADER_OPCODE_MULH, result, op[0], op[1]); |
| break; |
| |
| case nir_op_idiv: |
| case nir_op_udiv: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.emit(SHADER_OPCODE_INT_QUOTIENT, result, op[0], op[1]); |
| break; |
| |
| case nir_op_uadd_carry: |
| unreachable("Should have been lowered by carry_to_arith()."); |
| |
| case nir_op_usub_borrow: |
| unreachable("Should have been lowered by borrow_to_arith()."); |
| |
| case nir_op_umod: |
| case nir_op_irem: |
| /* According to the sign table for INT DIV in the Ivy Bridge PRM, it |
| * appears that our hardware just does the right thing for signed |
| * remainder. |
| */ |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.emit(SHADER_OPCODE_INT_REMAINDER, result, op[0], op[1]); |
| break; |
| |
| case nir_op_imod: { |
| /* Get a regular C-style remainder. If a % b == 0, set the predicate. */ |
| bld.emit(SHADER_OPCODE_INT_REMAINDER, result, op[0], op[1]); |
| |
| /* Math instructions don't support conditional mod */ |
| inst = bld.MOV(bld.null_reg_d(), result); |
| inst->conditional_mod = BRW_CONDITIONAL_NZ; |
| |
| /* Now, we need to determine if signs of the sources are different. |
| * When we XOR the sources, the top bit is 0 if they are the same and 1 |
| * if they are different. We can then use a conditional modifier to |
| * turn that into a predicate. This leads us to an XOR.l instruction. |
| * |
| * Technically, according to the PRM, you're not allowed to use .l on a |
| * XOR instruction. However, emperical experiments and Curro's reading |
| * of the simulator source both indicate that it's safe. |
| */ |
| fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_D); |
| inst = bld.XOR(tmp, op[0], op[1]); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| inst->conditional_mod = BRW_CONDITIONAL_L; |
| |
| /* If the result of the initial remainder operation is non-zero and the |
| * two sources have different signs, add in a copy of op[1] to get the |
| * final integer modulus value. |
| */ |
| inst = bld.ADD(result, result, op[1]); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| break; |
| } |
| |
| case nir_op_flt: |
| case nir_op_fge: |
| case nir_op_feq: |
| case nir_op_fne: { |
| fs_reg dest = result; |
| if (nir_src_bit_size(instr->src[0].src) > 32) { |
| dest = bld.vgrf(BRW_REGISTER_TYPE_DF, 1); |
| } |
| brw_conditional_mod cond; |
| switch (instr->op) { |
| case nir_op_flt: |
| cond = BRW_CONDITIONAL_L; |
| break; |
| case nir_op_fge: |
| cond = BRW_CONDITIONAL_GE; |
| break; |
| case nir_op_feq: |
| cond = BRW_CONDITIONAL_Z; |
| break; |
| case nir_op_fne: |
| cond = BRW_CONDITIONAL_NZ; |
| break; |
| default: |
| unreachable("bad opcode"); |
| } |
| bld.CMP(dest, op[0], op[1], cond); |
| if (nir_src_bit_size(instr->src[0].src) > 32) { |
| bld.MOV(result, subscript(dest, BRW_REGISTER_TYPE_UD, 0)); |
| } |
| break; |
| } |
| |
| case nir_op_ilt: |
| case nir_op_ult: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.CMP(result, op[0], op[1], BRW_CONDITIONAL_L); |
| break; |
| |
| case nir_op_ige: |
| case nir_op_uge: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.CMP(result, op[0], op[1], BRW_CONDITIONAL_GE); |
| break; |
| |
| case nir_op_ieq: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.CMP(result, op[0], op[1], BRW_CONDITIONAL_Z); |
| break; |
| |
| case nir_op_ine: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.CMP(result, op[0], op[1], BRW_CONDITIONAL_NZ); |
| break; |
| |
| case nir_op_inot: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| if (devinfo->gen >= 8) { |
| op[0] = resolve_source_modifiers(op[0]); |
| } |
| bld.NOT(result, op[0]); |
| break; |
| case nir_op_ixor: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| if (devinfo->gen >= 8) { |
| op[0] = resolve_source_modifiers(op[0]); |
| op[1] = resolve_source_modifiers(op[1]); |
| } |
| bld.XOR(result, op[0], op[1]); |
| break; |
| case nir_op_ior: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| if (devinfo->gen >= 8) { |
| op[0] = resolve_source_modifiers(op[0]); |
| op[1] = resolve_source_modifiers(op[1]); |
| } |
| bld.OR(result, op[0], op[1]); |
| break; |
| case nir_op_iand: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| if (devinfo->gen >= 8) { |
| op[0] = resolve_source_modifiers(op[0]); |
| op[1] = resolve_source_modifiers(op[1]); |
| } |
| bld.AND(result, op[0], op[1]); |
| break; |
| |
| case nir_op_fdot2: |
| case nir_op_fdot3: |
| case nir_op_fdot4: |
| case nir_op_ball_fequal2: |
| case nir_op_ball_iequal2: |
| case nir_op_ball_fequal3: |
| case nir_op_ball_iequal3: |
| case nir_op_ball_fequal4: |
| case nir_op_ball_iequal4: |
| case nir_op_bany_fnequal2: |
| case nir_op_bany_inequal2: |
| case nir_op_bany_fnequal3: |
| case nir_op_bany_inequal3: |
| case nir_op_bany_fnequal4: |
| case nir_op_bany_inequal4: |
| unreachable("Lowered by nir_lower_alu_reductions"); |
| |
| case nir_op_fnoise1_1: |
| case nir_op_fnoise1_2: |
| case nir_op_fnoise1_3: |
| case nir_op_fnoise1_4: |
| case nir_op_fnoise2_1: |
| case nir_op_fnoise2_2: |
| case nir_op_fnoise2_3: |
| case nir_op_fnoise2_4: |
| case nir_op_fnoise3_1: |
| case nir_op_fnoise3_2: |
| case nir_op_fnoise3_3: |
| case nir_op_fnoise3_4: |
| case nir_op_fnoise4_1: |
| case nir_op_fnoise4_2: |
| case nir_op_fnoise4_3: |
| case nir_op_fnoise4_4: |
| unreachable("not reached: should be handled by lower_noise"); |
| |
| case nir_op_ldexp: |
| unreachable("not reached: should be handled by ldexp_to_arith()"); |
| |
| case nir_op_fsqrt: |
| inst = bld.emit(SHADER_OPCODE_SQRT, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_frsq: |
| inst = bld.emit(SHADER_OPCODE_RSQ, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_b2i: |
| case nir_op_b2f: |
| bld.MOV(result, negate(op[0])); |
| break; |
| |
| case nir_op_f2b: |
| bld.CMP(result, op[0], brw_imm_f(0.0f), BRW_CONDITIONAL_NZ); |
| break; |
| case nir_op_d2b: { |
| /* two-argument instructions can't take 64-bit immediates */ |
| fs_reg zero = vgrf(glsl_type::double_type); |
| bld.MOV(zero, setup_imm_df(bld, 0.0)); |
| /* A SIMD16 execution needs to be split in two instructions, so use |
| * a vgrf instead of the flag register as dst so instruction splitting |
| * works |
| */ |
| fs_reg tmp = vgrf(glsl_type::double_type); |
| bld.CMP(tmp, op[0], zero, BRW_CONDITIONAL_NZ); |
| bld.MOV(result, subscript(tmp, BRW_REGISTER_TYPE_UD, 0)); |
| break; |
| } |
| case nir_op_i2b: |
| bld.CMP(result, op[0], brw_imm_d(0), BRW_CONDITIONAL_NZ); |
| break; |
| |
| case nir_op_ftrunc: |
| inst = bld.RNDZ(result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_fceil: { |
| op[0].negate = !op[0].negate; |
| fs_reg temp = vgrf(glsl_type::float_type); |
| bld.RNDD(temp, op[0]); |
| temp.negate = true; |
| inst = bld.MOV(result, temp); |
| inst->saturate = instr->dest.saturate; |
| break; |
| } |
| case nir_op_ffloor: |
| inst = bld.RNDD(result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_ffract: |
| inst = bld.FRC(result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_fround_even: |
| inst = bld.RNDE(result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_fquantize2f16: { |
| fs_reg tmp16 = bld.vgrf(BRW_REGISTER_TYPE_D); |
| fs_reg tmp32 = bld.vgrf(BRW_REGISTER_TYPE_F); |
| fs_reg zero = bld.vgrf(BRW_REGISTER_TYPE_F); |
| |
| /* The destination stride must be at least as big as the source stride. */ |
| tmp16.type = BRW_REGISTER_TYPE_W; |
| tmp16.stride = 2; |
| |
| /* Check for denormal */ |
| fs_reg abs_src0 = op[0]; |
| abs_src0.abs = true; |
| bld.CMP(bld.null_reg_f(), abs_src0, brw_imm_f(ldexpf(1.0, -14)), |
| BRW_CONDITIONAL_L); |
| /* Get the appropriately signed zero */ |
| bld.AND(retype(zero, BRW_REGISTER_TYPE_UD), |
| retype(op[0], BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(0x80000000)); |
| /* Do the actual F32 -> F16 -> F32 conversion */ |
| bld.emit(BRW_OPCODE_F32TO16, tmp16, op[0]); |
| bld.emit(BRW_OPCODE_F16TO32, tmp32, tmp16); |
| /* Select that or zero based on normal status */ |
| inst = bld.SEL(result, zero, tmp32); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| inst->saturate = instr->dest.saturate; |
| break; |
| } |
| |
| case nir_op_imin: |
| case nir_op_umin: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| case nir_op_fmin: |
| inst = bld.emit_minmax(result, op[0], op[1], BRW_CONDITIONAL_L); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_imax: |
| case nir_op_umax: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| case nir_op_fmax: |
| inst = bld.emit_minmax(result, op[0], op[1], BRW_CONDITIONAL_GE); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_pack_snorm_2x16: |
| case nir_op_pack_snorm_4x8: |
| case nir_op_pack_unorm_2x16: |
| case nir_op_pack_unorm_4x8: |
| case nir_op_unpack_snorm_2x16: |
| case nir_op_unpack_snorm_4x8: |
| case nir_op_unpack_unorm_2x16: |
| case nir_op_unpack_unorm_4x8: |
| case nir_op_unpack_half_2x16: |
| case nir_op_pack_half_2x16: |
| unreachable("not reached: should be handled by lower_packing_builtins"); |
| |
| case nir_op_unpack_half_2x16_split_x: |
| inst = bld.emit(FS_OPCODE_UNPACK_HALF_2x16_SPLIT_X, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| case nir_op_unpack_half_2x16_split_y: |
| inst = bld.emit(FS_OPCODE_UNPACK_HALF_2x16_SPLIT_Y, result, op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_pack_double_2x32_split: |
| /* Optimize the common case where we are re-packing a double with |
| * the result of a previous double unpack. In this case we can take the |
| * 32-bit value to use in the re-pack from the original double and bypass |
| * the unpack operation. |
| */ |
| for (int i = 0; i < 2; i++) { |
| if (instr->src[i].src.is_ssa) |
| continue; |
| |
| const nir_instr *parent_instr = instr->src[i].src.ssa->parent_instr; |
| if (parent_instr->type == nir_instr_type_alu) |
| continue; |
| |
| const nir_alu_instr *alu_parent = nir_instr_as_alu(parent_instr); |
| if (alu_parent->op == nir_op_unpack_double_2x32_split_x || |
| alu_parent->op == nir_op_unpack_double_2x32_split_y) |
| continue; |
| |
| if (!alu_parent->src[0].src.is_ssa) |
| continue; |
| |
| op[i] = get_nir_src(alu_parent->src[0].src); |
| op[i] = offset(retype(op[i], BRW_REGISTER_TYPE_DF), bld, |
| alu_parent->src[0].swizzle[channel]); |
| if (alu_parent->op == nir_op_unpack_double_2x32_split_y) |
| op[i] = subscript(op[i], BRW_REGISTER_TYPE_UD, 1); |
| else |
| op[i] = subscript(op[i], BRW_REGISTER_TYPE_UD, 0); |
| } |
| bld.emit(FS_OPCODE_PACK, result, op[0], op[1]); |
| break; |
| |
| case nir_op_unpack_double_2x32_split_x: |
| case nir_op_unpack_double_2x32_split_y: { |
| /* Optimize the common case where we are unpacking from a double we have |
| * previously packed. In this case we can just bypass the pack operation |
| * and source directly from its arguments. |
| */ |
| unsigned index = (instr->op == nir_op_unpack_double_2x32_split_x) ? 0 : 1; |
| if (instr->src[0].src.is_ssa) { |
| nir_instr *parent_instr = instr->src[0].src.ssa->parent_instr; |
| if (parent_instr->type == nir_instr_type_alu) { |
| nir_alu_instr *alu_parent = nir_instr_as_alu(parent_instr); |
| if (alu_parent->op == nir_op_pack_double_2x32_split && |
| alu_parent->src[index].src.is_ssa) { |
| op[0] = retype(get_nir_src(alu_parent->src[index].src), |
| BRW_REGISTER_TYPE_UD); |
| op[0] = |
| offset(op[0], bld, alu_parent->src[index].swizzle[channel]); |
| bld.MOV(result, op[0]); |
| break; |
| } |
| } |
| } |
| |
| if (instr->op == nir_op_unpack_double_2x32_split_x) |
| bld.MOV(result, subscript(op[0], BRW_REGISTER_TYPE_UD, 0)); |
| else |
| bld.MOV(result, subscript(op[0], BRW_REGISTER_TYPE_UD, 1)); |
| break; |
| } |
| |
| case nir_op_fpow: |
| inst = bld.emit(SHADER_OPCODE_POW, result, op[0], op[1]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_bitfield_reverse: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.BFREV(result, op[0]); |
| break; |
| |
| case nir_op_bit_count: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.CBIT(result, op[0]); |
| break; |
| |
| case nir_op_ufind_msb: { |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| emit_find_msb_using_lzd(bld, result, op[0], false); |
| break; |
| } |
| |
| case nir_op_ifind_msb: { |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| |
| if (devinfo->gen < 7) { |
| emit_find_msb_using_lzd(bld, result, op[0], true); |
| } else { |
| bld.FBH(retype(result, BRW_REGISTER_TYPE_UD), op[0]); |
| |
| /* FBH counts from the MSB side, while GLSL's findMSB() wants the |
| * count from the LSB side. If FBH didn't return an error |
| * (0xFFFFFFFF), then subtract the result from 31 to convert the MSB |
| * count into an LSB count. |
| */ |
| bld.CMP(bld.null_reg_d(), result, brw_imm_d(-1), BRW_CONDITIONAL_NZ); |
| |
| inst = bld.ADD(result, result, brw_imm_d(31)); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| inst->src[0].negate = true; |
| } |
| break; |
| } |
| |
| case nir_op_find_lsb: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| |
| if (devinfo->gen < 7) { |
| fs_reg temp = vgrf(glsl_type::int_type); |
| |
| /* (x & -x) generates a value that consists of only the LSB of x. |
| * For all powers of 2, findMSB(y) == findLSB(y). |
| */ |
| fs_reg src = retype(op[0], BRW_REGISTER_TYPE_D); |
| fs_reg negated_src = src; |
| |
| /* One must be negated, and the other must be non-negated. It |
| * doesn't matter which is which. |
| */ |
| negated_src.negate = true; |
| src.negate = false; |
| |
| bld.AND(temp, src, negated_src); |
| emit_find_msb_using_lzd(bld, result, temp, false); |
| } else { |
| bld.FBL(result, op[0]); |
| } |
| break; |
| |
| case nir_op_ubitfield_extract: |
| case nir_op_ibitfield_extract: |
| unreachable("should have been lowered"); |
| case nir_op_ubfe: |
| case nir_op_ibfe: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.BFE(result, op[2], op[1], op[0]); |
| break; |
| case nir_op_bfm: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.BFI1(result, op[0], op[1]); |
| break; |
| case nir_op_bfi: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.BFI2(result, op[0], op[1], op[2]); |
| break; |
| |
| case nir_op_bitfield_insert: |
| unreachable("not reached: should have been lowered"); |
| |
| case nir_op_ishl: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.SHL(result, op[0], op[1]); |
| break; |
| case nir_op_ishr: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.ASR(result, op[0], op[1]); |
| break; |
| case nir_op_ushr: |
| assert(nir_dest_bit_size(instr->dest.dest) < 64); |
| bld.SHR(result, op[0], op[1]); |
| break; |
| |
| case nir_op_pack_half_2x16_split: |
| bld.emit(FS_OPCODE_PACK_HALF_2x16_SPLIT, result, op[0], op[1]); |
| break; |
| |
| case nir_op_ffma: |
| inst = bld.MAD(result, op[2], op[1], op[0]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_flrp: |
| inst = bld.LRP(result, op[0], op[1], op[2]); |
| inst->saturate = instr->dest.saturate; |
| break; |
| |
| case nir_op_bcsel: |
| if (optimize_frontfacing_ternary(instr, result)) |
| return; |
| |
| bld.CMP(bld.null_reg_d(), op[0], brw_imm_d(0), BRW_CONDITIONAL_NZ); |
| inst = bld.SEL(result, op[1], op[2]); |
| inst->predicate = BRW_PREDICATE_NORMAL; |
| break; |
| |
| case nir_op_extract_u8: |
| case nir_op_extract_i8: { |
| const brw_reg_type type = brw_int_type(1, instr->op == nir_op_extract_i8); |
| nir_const_value *byte = nir_src_as_const_value(instr->src[1].src); |
| assert(byte != NULL); |
| bld.MOV(result, subscript(op[0], type, byte->u32[0])); |
| break; |
| } |
| |
| case nir_op_extract_u16: |
| case nir_op_extract_i16: { |
| const brw_reg_type type = brw_int_type(2, instr->op == nir_op_extract_i16); |
| nir_const_value *word = nir_src_as_const_value(instr->src[1].src); |
| assert(word != NULL); |
| bld.MOV(result, subscript(op[0], type, word->u32[0])); |
| break; |
| } |
| |
| default: |
| unreachable("unhandled instruction"); |
| } |
| |
| /* If we need to do a boolean resolve, replace the result with -(x & 1) |
| * to sign extend the low bit to 0/~0 |
| */ |
| if (devinfo->gen <= 5 && |
| (instr->instr.pass_flags & BRW_NIR_BOOLEAN_MASK) == BRW_NIR_BOOLEAN_NEEDS_RESOLVE) { |
| fs_reg masked = vgrf(glsl_type::int_type); |
| bld.AND(masked, result, brw_imm_d(1)); |
| masked.negate = true; |
| bld.MOV(retype(result, BRW_REGISTER_TYPE_D), masked); |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_load_const(const fs_builder &bld, |
| nir_load_const_instr *instr) |
| { |
| const brw_reg_type reg_type = |
| instr->def.bit_size == 32 ? BRW_REGISTER_TYPE_D : BRW_REGISTER_TYPE_DF; |
| fs_reg reg = bld.vgrf(reg_type, instr->def.num_components); |
| |
| switch (instr->def.bit_size) { |
| case 32: |
| for (unsigned i = 0; i < instr->def.num_components; i++) |
| bld.MOV(offset(reg, bld, i), brw_imm_d(instr->value.i32[i])); |
| break; |
| |
| case 64: |
| for (unsigned i = 0; i < instr->def.num_components; i++) |
| bld.MOV(offset(reg, bld, i), |
| setup_imm_df(bld, instr->value.f64[i])); |
| break; |
| |
| default: |
| unreachable("Invalid bit size"); |
| } |
| |
| nir_ssa_values[instr->def.index] = reg; |
| } |
| |
| fs_reg |
| fs_visitor::get_nir_src(const nir_src &src) |
| { |
| fs_reg reg; |
| if (src.is_ssa) { |
| if (src.ssa->parent_instr->type == nir_instr_type_ssa_undef) { |
| const brw_reg_type reg_type = src.ssa->bit_size == 32 ? |
| BRW_REGISTER_TYPE_D : BRW_REGISTER_TYPE_DF; |
| reg = bld.vgrf(reg_type, src.ssa->num_components); |
| } else { |
| reg = nir_ssa_values[src.ssa->index]; |
| } |
| } else { |
| /* We don't handle indirects on locals */ |
| assert(src.reg.indirect == NULL); |
| reg = offset(nir_locals[src.reg.reg->index], bld, |
| src.reg.base_offset * src.reg.reg->num_components); |
| } |
| |
| /* to avoid floating-point denorm flushing problems, set the type by |
| * default to D - instructions that need floating point semantics will set |
| * this to F if they need to |
| */ |
| return retype(reg, BRW_REGISTER_TYPE_D); |
| } |
| |
| /** |
| * Return an IMM for constants; otherwise call get_nir_src() as normal. |
| */ |
| fs_reg |
| fs_visitor::get_nir_src_imm(const nir_src &src) |
| { |
| nir_const_value *val = nir_src_as_const_value(src); |
| return val ? fs_reg(brw_imm_d(val->i32[0])) : get_nir_src(src); |
| } |
| |
| fs_reg |
| fs_visitor::get_nir_dest(const nir_dest &dest) |
| { |
| if (dest.is_ssa) { |
| const brw_reg_type reg_type = |
| dest.ssa.bit_size == 32 ? BRW_REGISTER_TYPE_F : BRW_REGISTER_TYPE_DF; |
| nir_ssa_values[dest.ssa.index] = |
| bld.vgrf(reg_type, dest.ssa.num_components); |
| return nir_ssa_values[dest.ssa.index]; |
| } else { |
| /* We don't handle indirects on locals */ |
| assert(dest.reg.indirect == NULL); |
| return offset(nir_locals[dest.reg.reg->index], bld, |
| dest.reg.base_offset * dest.reg.reg->num_components); |
| } |
| } |
| |
| fs_reg |
| fs_visitor::get_nir_image_deref(const nir_deref_var *deref) |
| { |
| fs_reg image(UNIFORM, deref->var->data.driver_location / 4, |
| BRW_REGISTER_TYPE_UD); |
| fs_reg indirect; |
| unsigned indirect_max = 0; |
| |
| for (const nir_deref *tail = &deref->deref; tail->child; |
| tail = tail->child) { |
| const nir_deref_array *deref_array = nir_deref_as_array(tail->child); |
| assert(tail->child->deref_type == nir_deref_type_array); |
| const unsigned size = glsl_get_length(tail->type); |
| const unsigned element_size = type_size_scalar(deref_array->deref.type); |
| const unsigned base = MIN2(deref_array->base_offset, size - 1); |
| image = offset(image, bld, base * element_size); |
| |
| if (deref_array->deref_array_type == nir_deref_array_type_indirect) { |
| fs_reg tmp = vgrf(glsl_type::uint_type); |
| |
| /* Accessing an invalid surface index with the dataport can result |
| * in a hang. According to the spec "if the index used to |
| * select an individual element is negative or greater than or |
| * equal to the size of the array, the results of the operation |
| * are undefined but may not lead to termination" -- which is one |
| * of the possible outcomes of the hang. Clamp the index to |
| * prevent access outside of the array bounds. |
| */ |
| bld.emit_minmax(tmp, retype(get_nir_src(deref_array->indirect), |
| BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(size - base - 1), BRW_CONDITIONAL_L); |
| |
| indirect_max += element_size * (tail->type->length - 1); |
| |
| bld.MUL(tmp, tmp, brw_imm_ud(element_size * 4)); |
| if (indirect.file == BAD_FILE) { |
| indirect = tmp; |
| } else { |
| bld.ADD(indirect, indirect, tmp); |
| } |
| } |
| } |
| |
| if (indirect.file == BAD_FILE) { |
| return image; |
| } else { |
| /* Emit a pile of MOVs to load the uniform into a temporary. The |
| * dead-code elimination pass will get rid of what we don't use. |
| */ |
| fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UD, BRW_IMAGE_PARAM_SIZE); |
| for (unsigned j = 0; j < BRW_IMAGE_PARAM_SIZE; j++) { |
| bld.emit(SHADER_OPCODE_MOV_INDIRECT, |
| offset(tmp, bld, j), offset(image, bld, j), |
| indirect, brw_imm_ud((indirect_max + 1) * 4)); |
| } |
| return tmp; |
| } |
| } |
| |
| void |
| fs_visitor::emit_percomp(const fs_builder &bld, const fs_inst &inst, |
| unsigned wr_mask) |
| { |
| for (unsigned i = 0; i < 4; i++) { |
| if (!((wr_mask >> i) & 1)) |
| continue; |
| |
| fs_inst *new_inst = new(mem_ctx) fs_inst(inst); |
| new_inst->dst = offset(new_inst->dst, bld, i); |
| for (unsigned j = 0; j < new_inst->sources; j++) |
| if (new_inst->src[j].file == VGRF) |
| new_inst->src[j] = offset(new_inst->src[j], bld, i); |
| |
| bld.emit(new_inst); |
| } |
| } |
| |
| /** |
| * Get the matching channel register datatype for an image intrinsic of the |
| * specified GLSL image type. |
| */ |
| static brw_reg_type |
| get_image_base_type(const glsl_type *type) |
| { |
| switch ((glsl_base_type)type->sampled_type) { |
| case GLSL_TYPE_UINT: |
| return BRW_REGISTER_TYPE_UD; |
| case GLSL_TYPE_INT: |
| return BRW_REGISTER_TYPE_D; |
| case GLSL_TYPE_FLOAT: |
| return BRW_REGISTER_TYPE_F; |
| default: |
| unreachable("Not reached."); |
| } |
| } |
| |
| /** |
| * Get the appropriate atomic op for an image atomic intrinsic. |
| */ |
| static unsigned |
| get_image_atomic_op(nir_intrinsic_op op, const glsl_type *type) |
| { |
| switch (op) { |
| case nir_intrinsic_image_atomic_add: |
| return BRW_AOP_ADD; |
| case nir_intrinsic_image_atomic_min: |
| return (get_image_base_type(type) == BRW_REGISTER_TYPE_D ? |
| BRW_AOP_IMIN : BRW_AOP_UMIN); |
| case nir_intrinsic_image_atomic_max: |
| return (get_image_base_type(type) == BRW_REGISTER_TYPE_D ? |
| BRW_AOP_IMAX : BRW_AOP_UMAX); |
| case nir_intrinsic_image_atomic_and: |
| return BRW_AOP_AND; |
| case nir_intrinsic_image_atomic_or: |
| return BRW_AOP_OR; |
| case nir_intrinsic_image_atomic_xor: |
| return BRW_AOP_XOR; |
| case nir_intrinsic_image_atomic_exchange: |
| return BRW_AOP_MOV; |
| case nir_intrinsic_image_atomic_comp_swap: |
| return BRW_AOP_CMPWR; |
| default: |
| unreachable("Not reachable."); |
| } |
| } |
| |
| static fs_inst * |
| emit_pixel_interpolater_send(const fs_builder &bld, |
| enum opcode opcode, |
| const fs_reg &dst, |
| const fs_reg &src, |
| const fs_reg &desc, |
| glsl_interp_mode interpolation) |
| { |
| struct brw_wm_prog_data *wm_prog_data = |
| (struct brw_wm_prog_data *) bld.shader->stage_prog_data; |
| fs_inst *inst; |
| fs_reg payload; |
| int mlen; |
| |
| if (src.file == BAD_FILE) { |
| /* Dummy payload */ |
| payload = bld.vgrf(BRW_REGISTER_TYPE_F, 1); |
| mlen = 1; |
| } else { |
| payload = src; |
| mlen = 2 * bld.dispatch_width() / 8; |
| } |
| |
| inst = bld.emit(opcode, dst, payload, desc); |
| inst->mlen = mlen; |
| /* 2 floats per slot returned */ |
| inst->regs_written = 2 * bld.dispatch_width() / 8; |
| inst->pi_noperspective = interpolation == INTERP_MODE_NOPERSPECTIVE; |
| |
| wm_prog_data->pulls_bary = true; |
| |
| return inst; |
| } |
| |
| /** |
| * Computes 1 << x, given a D/UD register containing some value x. |
| */ |
| static fs_reg |
| intexp2(const fs_builder &bld, const fs_reg &x) |
| { |
| assert(x.type == BRW_REGISTER_TYPE_UD || x.type == BRW_REGISTER_TYPE_D); |
| |
| fs_reg result = bld.vgrf(x.type, 1); |
| fs_reg one = bld.vgrf(x.type, 1); |
| |
| bld.MOV(one, retype(brw_imm_d(1), one.type)); |
| bld.SHL(result, one, x); |
| return result; |
| } |
| |
| void |
| fs_visitor::emit_gs_end_primitive(const nir_src &vertex_count_nir_src) |
| { |
| assert(stage == MESA_SHADER_GEOMETRY); |
| |
| struct brw_gs_prog_data *gs_prog_data = |
| (struct brw_gs_prog_data *) prog_data; |
| |
| if (gs_compile->control_data_header_size_bits == 0) |
| return; |
| |
| /* We can only do EndPrimitive() functionality when the control data |
| * consists of cut bits. Fortunately, the only time it isn't is when the |
| * output type is points, in which case EndPrimitive() is a no-op. |
| */ |
| if (gs_prog_data->control_data_format != |
| GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_CUT) { |
| return; |
| } |
| |
| /* Cut bits use one bit per vertex. */ |
| assert(gs_compile->control_data_bits_per_vertex == 1); |
| |
| fs_reg vertex_count = get_nir_src(vertex_count_nir_src); |
| vertex_count.type = BRW_REGISTER_TYPE_UD; |
| |
| /* Cut bit n should be set to 1 if EndPrimitive() was called after emitting |
| * vertex n, 0 otherwise. So all we need to do here is mark bit |
| * (vertex_count - 1) % 32 in the cut_bits register to indicate that |
| * EndPrimitive() was called after emitting vertex (vertex_count - 1); |
| * vec4_gs_visitor::emit_control_data_bits() will take care of the rest. |
| * |
| * Note that if EndPrimitive() is called before emitting any vertices, this |
| * will cause us to set bit 31 of the control_data_bits register to 1. |
| * That's fine because: |
| * |
| * - If max_vertices < 32, then vertex number 31 (zero-based) will never be |
| * output, so the hardware will ignore cut bit 31. |
| * |
| * - If max_vertices == 32, then vertex number 31 is guaranteed to be the |
| * last vertex, so setting cut bit 31 has no effect (since the primitive |
| * is automatically ended when the GS terminates). |
| * |
| * - If max_vertices > 32, then the ir_emit_vertex visitor will reset the |
| * control_data_bits register to 0 when the first vertex is emitted. |
| */ |
| |
| const fs_builder abld = bld.annotate("end primitive"); |
| |
| /* control_data_bits |= 1 << ((vertex_count - 1) % 32) */ |
| fs_reg prev_count = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| abld.ADD(prev_count, vertex_count, brw_imm_ud(0xffffffffu)); |
| fs_reg mask = intexp2(abld, prev_count); |
| /* Note: we're relying on the fact that the GEN SHL instruction only pays |
| * attention to the lower 5 bits of its second source argument, so on this |
| * architecture, 1 << (vertex_count - 1) is equivalent to 1 << |
| * ((vertex_count - 1) % 32). |
| */ |
| abld.OR(this->control_data_bits, this->control_data_bits, mask); |
| } |
| |
| void |
| fs_visitor::emit_gs_control_data_bits(const fs_reg &vertex_count) |
| { |
| assert(stage == MESA_SHADER_GEOMETRY); |
| assert(gs_compile->control_data_bits_per_vertex != 0); |
| |
| struct brw_gs_prog_data *gs_prog_data = |
| (struct brw_gs_prog_data *) prog_data; |
| |
| const fs_builder abld = bld.annotate("emit control data bits"); |
| const fs_builder fwa_bld = bld.exec_all(); |
| |
| /* We use a single UD register to accumulate control data bits (32 bits |
| * for each of the SIMD8 channels). So we need to write a DWord (32 bits) |
| * at a time. |
| * |
| * Unfortunately, the URB_WRITE_SIMD8 message uses 128-bit (OWord) offsets. |
| * We have select a 128-bit group via the Global and Per-Slot Offsets, then |
| * use the Channel Mask phase to enable/disable which DWord within that |
| * group to write. (Remember, different SIMD8 channels may have emitted |
| * different numbers of vertices, so we may need per-slot offsets.) |
| * |
| * Channel masking presents an annoying problem: we may have to replicate |
| * the data up to 4 times: |
| * |
| * Msg = Handles, Per-Slot Offsets, Channel Masks, Data, Data, Data, Data. |
| * |
| * To avoid penalizing shaders that emit a small number of vertices, we |
| * can avoid these sometimes: if the size of the control data header is |
| * <= 128 bits, then there is only 1 OWord. All SIMD8 channels will land |
| * land in the same 128-bit group, so we can skip per-slot offsets. |
| * |
| * Similarly, if the control data header is <= 32 bits, there is only one |
| * DWord, so we can skip channel masks. |
| */ |
| enum opcode opcode = SHADER_OPCODE_URB_WRITE_SIMD8; |
| |
| fs_reg channel_mask, per_slot_offset; |
| |
| if (gs_compile->control_data_header_size_bits > 32) { |
| opcode = SHADER_OPCODE_URB_WRITE_SIMD8_MASKED; |
| channel_mask = vgrf(glsl_type::uint_type); |
| } |
| |
| if (gs_compile->control_data_header_size_bits > 128) { |
| opcode = SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT; |
| per_slot_offset = vgrf(glsl_type::uint_type); |
| } |
| |
| /* Figure out which DWord we're trying to write to using the formula: |
| * |
| * dword_index = (vertex_count - 1) * bits_per_vertex / 32 |
| * |
| * Since bits_per_vertex is a power of two, and is known at compile |
| * time, this can be optimized to: |
| * |
| * dword_index = (vertex_count - 1) >> (6 - log2(bits_per_vertex)) |
| */ |
| if (opcode != SHADER_OPCODE_URB_WRITE_SIMD8) { |
| fs_reg dword_index = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| fs_reg prev_count = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| abld.ADD(prev_count, vertex_count, brw_imm_ud(0xffffffffu)); |
| unsigned log2_bits_per_vertex = |
| util_last_bit(gs_compile->control_data_bits_per_vertex); |
| abld.SHR(dword_index, prev_count, brw_imm_ud(6u - log2_bits_per_vertex)); |
| |
| if (per_slot_offset.file != BAD_FILE) { |
| /* Set the per-slot offset to dword_index / 4, so that we'll write to |
| * the appropriate OWord within the control data header. |
| */ |
| abld.SHR(per_slot_offset, dword_index, brw_imm_ud(2u)); |
| } |
| |
| /* Set the channel masks to 1 << (dword_index % 4), so that we'll |
| * write to the appropriate DWORD within the OWORD. |
| */ |
| fs_reg channel = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| fwa_bld.AND(channel, dword_index, brw_imm_ud(3u)); |
| channel_mask = intexp2(fwa_bld, channel); |
| /* Then the channel masks need to be in bits 23:16. */ |
| fwa_bld.SHL(channel_mask, channel_mask, brw_imm_ud(16u)); |
| } |
| |
| /* Store the control data bits in the message payload and send it. */ |
| int mlen = 2; |
| if (channel_mask.file != BAD_FILE) |
| mlen += 4; /* channel masks, plus 3 extra copies of the data */ |
| if (per_slot_offset.file != BAD_FILE) |
| mlen++; |
| |
| fs_reg payload = bld.vgrf(BRW_REGISTER_TYPE_UD, mlen); |
| fs_reg *sources = ralloc_array(mem_ctx, fs_reg, mlen); |
| int i = 0; |
| sources[i++] = fs_reg(retype(brw_vec8_grf(1, 0), BRW_REGISTER_TYPE_UD)); |
| if (per_slot_offset.file != BAD_FILE) |
| sources[i++] = per_slot_offset; |
| if (channel_mask.file != BAD_FILE) |
| sources[i++] = channel_mask; |
| while (i < mlen) { |
| sources[i++] = this->control_data_bits; |
| } |
| |
| abld.LOAD_PAYLOAD(payload, sources, mlen, mlen); |
| fs_inst *inst = abld.emit(opcode, reg_undef, payload); |
| inst->mlen = mlen; |
| /* We need to increment Global Offset by 256-bits to make room for |
| * Broadwell's extra "Vertex Count" payload at the beginning of the |
| * URB entry. Since this is an OWord message, Global Offset is counted |
| * in 128-bit units, so we must set it to 2. |
| */ |
| if (gs_prog_data->static_vertex_count == -1) |
| inst->offset = 2; |
| } |
| |
| void |
| fs_visitor::set_gs_stream_control_data_bits(const fs_reg &vertex_count, |
| unsigned stream_id) |
| { |
| /* control_data_bits |= stream_id << ((2 * (vertex_count - 1)) % 32) */ |
| |
| /* Note: we are calling this *before* increasing vertex_count, so |
| * this->vertex_count == vertex_count - 1 in the formula above. |
| */ |
| |
| /* Stream mode uses 2 bits per vertex */ |
| assert(gs_compile->control_data_bits_per_vertex == 2); |
| |
| /* Must be a valid stream */ |
| assert(stream_id >= 0 && stream_id < MAX_VERTEX_STREAMS); |
| |
| /* Control data bits are initialized to 0 so we don't have to set any |
| * bits when sending vertices to stream 0. |
| */ |
| if (stream_id == 0) |
| return; |
| |
| const fs_builder abld = bld.annotate("set stream control data bits", NULL); |
| |
| /* reg::sid = stream_id */ |
| fs_reg sid = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| abld.MOV(sid, brw_imm_ud(stream_id)); |
| |
| /* reg:shift_count = 2 * (vertex_count - 1) */ |
| fs_reg shift_count = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| abld.SHL(shift_count, vertex_count, brw_imm_ud(1u)); |
| |
| /* Note: we're relying on the fact that the GEN SHL instruction only pays |
| * attention to the lower 5 bits of its second source argument, so on this |
| * architecture, stream_id << 2 * (vertex_count - 1) is equivalent to |
| * stream_id << ((2 * (vertex_count - 1)) % 32). |
| */ |
| fs_reg mask = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| abld.SHL(mask, sid, shift_count); |
| abld.OR(this->control_data_bits, this->control_data_bits, mask); |
| } |
| |
| void |
| fs_visitor::emit_gs_vertex(const nir_src &vertex_count_nir_src, |
| unsigned stream_id) |
| { |
| assert(stage == MESA_SHADER_GEOMETRY); |
| |
| struct brw_gs_prog_data *gs_prog_data = |
| (struct brw_gs_prog_data *) prog_data; |
| |
| fs_reg vertex_count = get_nir_src(vertex_count_nir_src); |
| vertex_count.type = BRW_REGISTER_TYPE_UD; |
| |
| /* Haswell and later hardware ignores the "Render Stream Select" bits |
| * from the 3DSTATE_STREAMOUT packet when the SOL stage is disabled, |
| * and instead sends all primitives down the pipeline for rasterization. |
| * If the SOL stage is enabled, "Render Stream Select" is honored and |
| * primitives bound to non-zero streams are discarded after stream output. |
| * |
| * Since the only purpose of primives sent to non-zero streams is to |
| * be recorded by transform feedback, we can simply discard all geometry |
| * bound to these streams when transform feedback is disabled. |
| */ |
| if (stream_id > 0 && !nir->info.has_transform_feedback_varyings) |
| return; |
| |
| /* If we're outputting 32 control data bits or less, then we can wait |
| * until the shader is over to output them all. Otherwise we need to |
| * output them as we go. Now is the time to do it, since we're about to |
| * output the vertex_count'th vertex, so it's guaranteed that the |
| * control data bits associated with the (vertex_count - 1)th vertex are |
| * correct. |
| */ |
| if (gs_compile->control_data_header_size_bits > 32) { |
| const fs_builder abld = |
| bld.annotate("emit vertex: emit control data bits"); |
| |
| /* Only emit control data bits if we've finished accumulating a batch |
| * of 32 bits. This is the case when: |
| * |
| * (vertex_count * bits_per_vertex) % 32 == 0 |
| * |
| * (in other words, when the last 5 bits of vertex_count * |
| * bits_per_vertex are 0). Assuming bits_per_vertex == 2^n for some |
| * integer n (which is always the case, since bits_per_vertex is |
| * always 1 or 2), this is equivalent to requiring that the last 5-n |
| * bits of vertex_count are 0: |
| * |
| * vertex_count & (2^(5-n) - 1) == 0 |
| * |
| * 2^(5-n) == 2^5 / 2^n == 32 / bits_per_vertex, so this is |
| * equivalent to: |
| * |
| * vertex_count & (32 / bits_per_vertex - 1) == 0 |
| * |
| * TODO: If vertex_count is an immediate, we could do some of this math |
| * at compile time... |
| */ |
| fs_inst *inst = |
| abld.AND(bld.null_reg_d(), vertex_count, |
| brw_imm_ud(32u / gs_compile->control_data_bits_per_vertex - 1u)); |
| inst->conditional_mod = BRW_CONDITIONAL_Z; |
| |
| abld.IF(BRW_PREDICATE_NORMAL); |
| /* If vertex_count is 0, then no control data bits have been |
| * accumulated yet, so we can skip emitting them. |
| */ |
| abld.CMP(bld.null_reg_d(), vertex_count, brw_imm_ud(0u), |
| BRW_CONDITIONAL_NEQ); |
| abld.IF(BRW_PREDICATE_NORMAL); |
| emit_gs_control_data_bits(vertex_count); |
| abld.emit(BRW_OPCODE_ENDIF); |
| |
| /* Reset control_data_bits to 0 so we can start accumulating a new |
| * batch. |
| * |
| * Note: in the case where vertex_count == 0, this neutralizes the |
| * effect of any call to EndPrimitive() that the shader may have |
| * made before outputting its first vertex. |
| */ |
| inst = abld.MOV(this->control_data_bits, brw_imm_ud(0u)); |
| inst->force_writemask_all = true; |
| abld.emit(BRW_OPCODE_ENDIF); |
| } |
| |
| emit_urb_writes(vertex_count); |
| |
| /* In stream mode we have to set control data bits for all vertices |
| * unless we have disabled control data bits completely (which we do |
| * do for GL_POINTS outputs that don't use streams). |
| */ |
| if (gs_compile->control_data_header_size_bits > 0 && |
| gs_prog_data->control_data_format == |
| GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_SID) { |
| set_gs_stream_control_data_bits(vertex_count, stream_id); |
| } |
| } |
| |
| void |
| fs_visitor::emit_gs_input_load(const fs_reg &dst, |
| const nir_src &vertex_src, |
| unsigned base_offset, |
| const nir_src &offset_src, |
| unsigned num_components, |
| unsigned first_component) |
| { |
| struct brw_gs_prog_data *gs_prog_data = (struct brw_gs_prog_data *) prog_data; |
| |
| nir_const_value *vertex_const = nir_src_as_const_value(vertex_src); |
| nir_const_value *offset_const = nir_src_as_const_value(offset_src); |
| const unsigned push_reg_count = gs_prog_data->base.urb_read_length * 8; |
| |
| /* Offset 0 is the VUE header, which contains VARYING_SLOT_LAYER [.y], |
| * VARYING_SLOT_VIEWPORT [.z], and VARYING_SLOT_PSIZ [.w]. Only |
| * gl_PointSize is available as a GS input, however, so it must be that. |
| */ |
| const bool is_point_size = (base_offset == 0); |
| |
| /* TODO: figure out push input layout for invocations == 1 */ |
| if (gs_prog_data->invocations == 1 && |
| offset_const != NULL && vertex_const != NULL && |
| 4 * (base_offset + offset_const->u32[0]) < push_reg_count) { |
| int imm_offset = (base_offset + offset_const->u32[0]) * 4 + |
| vertex_const->u32[0] * push_reg_count; |
| /* This input was pushed into registers. */ |
| if (is_point_size) { |
| /* gl_PointSize comes in .w */ |
| bld.MOV(dst, fs_reg(ATTR, imm_offset + 3, dst.type)); |
| } else { |
| for (unsigned i = 0; i < num_components; i++) { |
| bld.MOV(offset(dst, bld, i), |
| fs_reg(ATTR, imm_offset + i, dst.type)); |
| } |
| } |
| return; |
| } |
| |
| /* Resort to the pull model. Ensure the VUE handles are provided. */ |
| gs_prog_data->base.include_vue_handles = true; |
| |
| unsigned first_icp_handle = gs_prog_data->include_primitive_id ? 3 : 2; |
| fs_reg icp_handle = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| |
| if (gs_prog_data->invocations == 1) { |
| if (vertex_const) { |
| /* The vertex index is constant; just select the proper URB handle. */ |
| icp_handle = |
| retype(brw_vec8_grf(first_icp_handle + vertex_const->i32[0], 0), |
| BRW_REGISTER_TYPE_UD); |
| } else { |
| /* The vertex index is non-constant. We need to use indirect |
| * addressing to fetch the proper URB handle. |
| * |
| * First, we start with the sequence <7, 6, 5, 4, 3, 2, 1, 0> |
| * indicating that channel <n> should read the handle from |
| * DWord <n>. We convert that to bytes by multiplying by 4. |
| * |
| * Next, we convert the vertex index to bytes by multiplying |
| * by 32 (shifting by 5), and add the two together. This is |
| * the final indirect byte offset. |
| */ |
| fs_reg sequence = bld.vgrf(BRW_REGISTER_TYPE_W, 1); |
| fs_reg channel_offsets = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| fs_reg vertex_offset_bytes = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| fs_reg icp_offset_bytes = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| |
| /* sequence = <7, 6, 5, 4, 3, 2, 1, 0> */ |
| bld.MOV(sequence, fs_reg(brw_imm_v(0x76543210))); |
| /* channel_offsets = 4 * sequence = <28, 24, 20, 16, 12, 8, 4, 0> */ |
| bld.SHL(channel_offsets, sequence, brw_imm_ud(2u)); |
| /* Convert vertex_index to bytes (multiply by 32) */ |
| bld.SHL(vertex_offset_bytes, |
| retype(get_nir_src(vertex_src), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(5u)); |
| bld.ADD(icp_offset_bytes, vertex_offset_bytes, channel_offsets); |
| |
| /* Use first_icp_handle as the base offset. There is one register |
| * of URB handles per vertex, so inform the register allocator that |
| * we might read up to nir->info.gs.vertices_in registers. |
| */ |
| bld.emit(SHADER_OPCODE_MOV_INDIRECT, icp_handle, |
| fs_reg(brw_vec8_grf(first_icp_handle, 0)), |
| fs_reg(icp_offset_bytes), |
| brw_imm_ud(nir->info.gs.vertices_in * REG_SIZE)); |
| } |
| } else { |
| assert(gs_prog_data->invocations > 1); |
| |
| if (vertex_const) { |
| assert(devinfo->gen >= 9 || vertex_const->i32[0] <= 5); |
| bld.MOV(icp_handle, |
| retype(brw_vec1_grf(first_icp_handle + |
| vertex_const->i32[0] / 8, |
| vertex_const->i32[0] % 8), |
| BRW_REGISTER_TYPE_UD)); |
| } else { |
| /* The vertex index is non-constant. We need to use indirect |
| * addressing to fetch the proper URB handle. |
| * |
| */ |
| fs_reg icp_offset_bytes = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| |
| /* Convert vertex_index to bytes (multiply by 4) */ |
| bld.SHL(icp_offset_bytes, |
| retype(get_nir_src(vertex_src), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(2u)); |
| |
| /* Use first_icp_handle as the base offset. There is one DWord |
| * of URB handles per vertex, so inform the register allocator that |
| * we might read up to ceil(nir->info.gs.vertices_in / 8) registers. |
| */ |
| bld.emit(SHADER_OPCODE_MOV_INDIRECT, icp_handle, |
| fs_reg(brw_vec8_grf(first_icp_handle, 0)), |
| fs_reg(icp_offset_bytes), |
| brw_imm_ud(DIV_ROUND_UP(nir->info.gs.vertices_in, 8) * |
| REG_SIZE)); |
| } |
| } |
| |
| fs_inst *inst; |
| |
| fs_reg tmp_dst = dst; |
| fs_reg indirect_offset = get_nir_src(offset_src); |
| unsigned num_iterations = 1; |
| unsigned orig_num_components = num_components; |
| |
| if (type_sz(dst.type) == 8) { |
| if (num_components > 2) { |
| num_iterations = 2; |
| num_components = 2; |
| } |
| fs_reg tmp = fs_reg(VGRF, alloc.allocate(4), dst.type); |
| tmp_dst = tmp; |
| first_component = first_component / 2; |
| } |
| |
| for (unsigned iter = 0; iter < num_iterations; iter++) { |
| if (offset_const) { |
| /* Constant indexing - use global offset. */ |
| if (first_component != 0) { |
| unsigned read_components = num_components + first_component; |
| fs_reg tmp = bld.vgrf(dst.type, read_components); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, tmp, icp_handle); |
| inst->regs_written = read_components * type_sz(tmp_dst.type) / 4; |
| for (unsigned i = 0; i < num_components; i++) { |
| bld.MOV(offset(tmp_dst, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, tmp_dst, |
| icp_handle); |
| inst->regs_written = num_components * type_sz(tmp_dst.type) / 4; |
| } |
| inst->offset = base_offset + offset_const->u32[0]; |
| inst->mlen = 1; |
| } else { |
| /* Indirect indexing - use per-slot offsets as well. */ |
| const fs_reg srcs[] = { icp_handle, indirect_offset }; |
| unsigned read_components = num_components + first_component; |
| fs_reg tmp = bld.vgrf(dst.type, read_components); |
| fs_reg payload = bld.vgrf(BRW_REGISTER_TYPE_UD, 2); |
| bld.LOAD_PAYLOAD(payload, srcs, ARRAY_SIZE(srcs), 0); |
| if (first_component != 0) { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, tmp, |
| payload); |
| inst->regs_written = read_components * type_sz(tmp_dst.type) / 4; |
| for (unsigned i = 0; i < num_components; i++) { |
| bld.MOV(offset(tmp_dst, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, tmp_dst, |
| payload); |
| inst->regs_written = num_components * type_sz(tmp_dst.type) / 4; |
| } |
| inst->offset = base_offset; |
| inst->mlen = 2; |
| } |
| |
| if (type_sz(dst.type) == 8) { |
| shuffle_32bit_load_result_to_64bit_data( |
| bld, tmp_dst, retype(tmp_dst, BRW_REGISTER_TYPE_F), num_components); |
| |
| for (unsigned c = 0; c < num_components; c++) |
| bld.MOV(offset(dst, bld, iter * 2 + c), offset(tmp_dst, bld, c)); |
| } |
| |
| if (num_iterations > 1) { |
| num_components = orig_num_components - 2; |
| if(offset_const) { |
| base_offset++; |
| } else { |
| fs_reg new_indirect = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| bld.ADD(new_indirect, indirect_offset, brw_imm_ud(1u)); |
| indirect_offset = new_indirect; |
| } |
| } |
| } |
| |
| if (is_point_size) { |
| /* Read the whole VUE header (because of alignment) and read .w. */ |
| fs_reg tmp = bld.vgrf(dst.type, 4); |
| inst->dst = tmp; |
| inst->regs_written = 4; |
| bld.MOV(dst, offset(tmp, bld, 3)); |
| } |
| } |
| |
| fs_reg |
| fs_visitor::get_indirect_offset(nir_intrinsic_instr *instr) |
| { |
| nir_src *offset_src = nir_get_io_offset_src(instr); |
| nir_const_value *const_value = nir_src_as_const_value(*offset_src); |
| |
| if (const_value) { |
| /* The only constant offset we should find is 0. brw_nir.c's |
| * add_const_offset_to_base() will fold other constant offsets |
| * into instr->const_index[0]. |
| */ |
| assert(const_value->u32[0] == 0); |
| return fs_reg(); |
| } |
| |
| return get_nir_src(*offset_src); |
| } |
| |
| static void |
| do_untyped_vector_read(const fs_builder &bld, |
| const fs_reg dest, |
| const fs_reg surf_index, |
| const fs_reg offset_reg, |
| unsigned num_components) |
| { |
| if (type_sz(dest.type) == 4) { |
| fs_reg read_result = emit_untyped_read(bld, surf_index, offset_reg, |
| 1 /* dims */, |
| num_components, |
| BRW_PREDICATE_NONE); |
| read_result.type = dest.type; |
| for (unsigned i = 0; i < num_components; i++) |
| bld.MOV(offset(dest, bld, i), offset(read_result, bld, i)); |
| } else if (type_sz(dest.type) == 8) { |
| /* Reading a dvec, so we need to: |
| * |
| * 1. Multiply num_components by 2, to account for the fact that we |
| * need to read 64-bit components. |
| * 2. Shuffle the result of the load to form valid 64-bit elements |
| * 3. Emit a second load (for components z/w) if needed. |
| */ |
| fs_reg read_offset = bld.vgrf(BRW_REGISTER_TYPE_UD); |
| bld.MOV(read_offset, offset_reg); |
| |
| int iters = num_components <= 2 ? 1 : 2; |
| |
| /* Load the dvec, the first iteration loads components x/y, the second |
| * iteration, if needed, loads components z/w |
| */ |
| for (int it = 0; it < iters; it++) { |
| /* Compute number of components to read in this iteration */ |
| int iter_components = MIN2(2, num_components); |
| num_components -= iter_components; |
| |
| /* Read. Since this message reads 32-bit components, we need to |
| * read twice as many components. |
| */ |
| fs_reg read_result = emit_untyped_read(bld, surf_index, read_offset, |
| 1 /* dims */, |
| iter_components * 2, |
| BRW_PREDICATE_NONE); |
| |
| /* Shuffle the 32-bit load result into valid 64-bit data */ |
| const fs_reg packed_result = bld.vgrf(dest.type, iter_components); |
| shuffle_32bit_load_result_to_64bit_data( |
| bld, packed_result, read_result, iter_components); |
| |
| /* Move each component to its destination */ |
| read_result = retype(read_result, BRW_REGISTER_TYPE_DF); |
| for (int c = 0; c < iter_components; c++) { |
| bld.MOV(offset(dest, bld, it * 2 + c), |
| offset(packed_result, bld, c)); |
| } |
| |
| bld.ADD(read_offset, read_offset, brw_imm_ud(16)); |
| } |
| } else { |
| unreachable("Unsupported type"); |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_vs_intrinsic(const fs_builder &bld, |
| nir_intrinsic_instr *instr) |
| { |
| assert(stage == MESA_SHADER_VERTEX); |
| |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| switch (instr->intrinsic) { |
| case nir_intrinsic_load_vertex_id: |
| unreachable("should be lowered by lower_vertex_id()"); |
| |
| case nir_intrinsic_load_vertex_id_zero_base: |
| case nir_intrinsic_load_base_vertex: |
| case nir_intrinsic_load_instance_id: |
| case nir_intrinsic_load_base_instance: |
| case nir_intrinsic_load_draw_id: { |
| gl_system_value sv = nir_system_value_from_intrinsic(instr->intrinsic); |
| fs_reg val = nir_system_values[sv]; |
| assert(val.file != BAD_FILE); |
| dest.type = val.type; |
| bld.MOV(dest, val); |
| break; |
| } |
| |
| case nir_intrinsic_load_input: { |
| fs_reg src = fs_reg(ATTR, instr->const_index[0], dest.type); |
| unsigned first_component = nir_intrinsic_component(instr); |
| unsigned num_components = instr->num_components; |
| enum brw_reg_type type = dest.type; |
| |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[0]); |
| assert(const_offset && "Indirect input loads not allowed"); |
| src = offset(src, bld, const_offset->u32[0]); |
| |
| for (unsigned j = 0; j < num_components; j++) { |
| bld.MOV(offset(dest, bld, j), offset(src, bld, j + first_component)); |
| } |
| |
| if (type == BRW_REGISTER_TYPE_DF) { |
| /* Once the double vector is read, set again its original register |
| * type to continue with normal execution. |
| */ |
| src = retype(src, type); |
| dest = retype(dest, type); |
| } |
| |
| if (type_sz(src.type) == 8) { |
| shuffle_32bit_load_result_to_64bit_data(bld, |
| dest, |
| retype(dest, BRW_REGISTER_TYPE_F), |
| instr->num_components); |
| } |
| break; |
| } |
| |
| default: |
| nir_emit_intrinsic(bld, instr); |
| break; |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_tcs_intrinsic(const fs_builder &bld, |
| nir_intrinsic_instr *instr) |
| { |
| assert(stage == MESA_SHADER_TESS_CTRL); |
| struct brw_tcs_prog_key *tcs_key = (struct brw_tcs_prog_key *) key; |
| struct brw_tcs_prog_data *tcs_prog_data = |
| (struct brw_tcs_prog_data *) prog_data; |
| |
| fs_reg dst; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dst = get_nir_dest(instr->dest); |
| |
| switch (instr->intrinsic) { |
| case nir_intrinsic_load_primitive_id: |
| bld.MOV(dst, fs_reg(brw_vec1_grf(0, 1))); |
| break; |
| case nir_intrinsic_load_invocation_id: |
| bld.MOV(retype(dst, invocation_id.type), invocation_id); |
| break; |
| case nir_intrinsic_load_patch_vertices_in: |
| bld.MOV(retype(dst, BRW_REGISTER_TYPE_D), |
| brw_imm_d(tcs_key->input_vertices)); |
| break; |
| |
| case nir_intrinsic_barrier: { |
| if (tcs_prog_data->instances == 1) |
| break; |
| |
| fs_reg m0 = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| fs_reg m0_2 = component(m0, 2); |
| |
| const fs_builder chanbld = bld.exec_all().group(1, 0); |
| |
| /* Zero the message header */ |
| bld.exec_all().MOV(m0, brw_imm_ud(0u)); |
| |
| /* Copy "Barrier ID" from r0.2, bits 16:13 */ |
| chanbld.AND(m0_2, retype(brw_vec1_grf(0, 2), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(INTEL_MASK(16, 13))); |
| |
| /* Shift it up to bits 27:24. */ |
| chanbld.SHL(m0_2, m0_2, brw_imm_ud(11)); |
| |
| /* Set the Barrier Count and the enable bit */ |
| chanbld.OR(m0_2, m0_2, |
| brw_imm_ud(tcs_prog_data->instances << 9 | (1 << 15))); |
| |
| bld.emit(SHADER_OPCODE_BARRIER, bld.null_reg_ud(), m0); |
| break; |
| } |
| |
| case nir_intrinsic_load_input: |
| unreachable("nir_lower_io should never give us these."); |
| break; |
| |
| case nir_intrinsic_load_per_vertex_input: { |
| fs_reg indirect_offset = get_indirect_offset(instr); |
| unsigned imm_offset = instr->const_index[0]; |
| |
| const nir_src &vertex_src = instr->src[0]; |
| nir_const_value *vertex_const = nir_src_as_const_value(vertex_src); |
| |
| fs_inst *inst; |
| |
| fs_reg icp_handle; |
| |
| if (vertex_const) { |
| /* Emit a MOV to resolve <0,1,0> regioning. */ |
| icp_handle = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| bld.MOV(icp_handle, |
| retype(brw_vec1_grf(1 + (vertex_const->i32[0] >> 3), |
| vertex_const->i32[0] & 7), |
| BRW_REGISTER_TYPE_UD)); |
| } else if (tcs_prog_data->instances == 1 && |
| vertex_src.is_ssa && |
| vertex_src.ssa->parent_instr->type == nir_instr_type_intrinsic && |
| nir_instr_as_intrinsic(vertex_src.ssa->parent_instr)->intrinsic == nir_intrinsic_load_invocation_id) { |
| /* For the common case of only 1 instance, an array index of |
| * gl_InvocationID means reading g1. Skip all the indirect work. |
| */ |
| icp_handle = retype(brw_vec8_grf(1, 0), BRW_REGISTER_TYPE_UD); |
| } else { |
| /* The vertex index is non-constant. We need to use indirect |
| * addressing to fetch the proper URB handle. |
| */ |
| icp_handle = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| |
| /* Each ICP handle is a single DWord (4 bytes) */ |
| fs_reg vertex_offset_bytes = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| bld.SHL(vertex_offset_bytes, |
| retype(get_nir_src(vertex_src), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(2u)); |
| |
| /* Start at g1. We might read up to 4 registers. */ |
| bld.emit(SHADER_OPCODE_MOV_INDIRECT, icp_handle, |
| fs_reg(brw_vec8_grf(1, 0)), vertex_offset_bytes, |
| brw_imm_ud(4 * REG_SIZE)); |
| } |
| |
| /* We can only read two double components with each URB read, so |
| * we send two read messages in that case, each one loading up to |
| * two double components. |
| */ |
| unsigned num_iterations = 1; |
| unsigned num_components = instr->num_components; |
| unsigned first_component = nir_intrinsic_component(instr); |
| fs_reg orig_dst = dst; |
| if (type_sz(dst.type) == 8) { |
| first_component = first_component / 2; |
| if (instr->num_components > 2) { |
| num_iterations = 2; |
| num_components = 2; |
| } |
| |
| fs_reg tmp = fs_reg(VGRF, alloc.allocate(4), dst.type); |
| dst = tmp; |
| } |
| |
| for (unsigned iter = 0; iter < num_iterations; iter++) { |
| if (indirect_offset.file == BAD_FILE) { |
| /* Constant indexing - use global offset. */ |
| if (first_component != 0) { |
| unsigned read_components = num_components + first_component; |
| fs_reg tmp = bld.vgrf(dst.type, read_components); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, tmp, icp_handle); |
| for (unsigned i = 0; i < num_components; i++) { |
| bld.MOV(offset(dst, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, dst, icp_handle); |
| } |
| inst->offset = imm_offset; |
| inst->mlen = 1; |
| } else { |
| /* Indirect indexing - use per-slot offsets as well. */ |
| const fs_reg srcs[] = { icp_handle, indirect_offset }; |
| fs_reg payload = bld.vgrf(BRW_REGISTER_TYPE_UD, 2); |
| bld.LOAD_PAYLOAD(payload, srcs, ARRAY_SIZE(srcs), 0); |
| if (first_component != 0) { |
| unsigned read_components = num_components + first_component; |
| fs_reg tmp = bld.vgrf(dst.type, read_components); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, tmp, |
| payload); |
| for (unsigned i = 0; i < num_components; i++) { |
| bld.MOV(offset(dst, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, dst, |
| payload); |
| } |
| inst->offset = imm_offset; |
| inst->mlen = 2; |
| } |
| inst->regs_written = |
| ((num_components + first_component) * type_sz(dst.type) / 4); |
| |
| /* If we are reading 64-bit data using 32-bit read messages we need |
| * build proper 64-bit data elements by shuffling the low and high |
| * 32-bit components around like we do for other things like UBOs |
| * or SSBOs. |
| */ |
| if (type_sz(dst.type) == 8) { |
| shuffle_32bit_load_result_to_64bit_data( |
| bld, dst, retype(dst, BRW_REGISTER_TYPE_F), num_components); |
| |
| for (unsigned c = 0; c < num_components; c++) { |
| bld.MOV(offset(orig_dst, bld, iter * 2 + c), |
| offset(dst, bld, c)); |
| } |
| } |
| |
| /* Copy the temporary to the destination to deal with writemasking. |
| * |
| * Also attempt to deal with gl_PointSize being in the .w component. |
| */ |
| if (inst->offset == 0 && indirect_offset.file == BAD_FILE) { |
| assert(type_sz(dst.type) < 8); |
| inst->dst = bld.vgrf(dst.type, 4); |
| inst->regs_written = 4; |
| bld.MOV(dst, offset(inst->dst, bld, 3)); |
| } |
| |
| /* If we are loading double data and we need a second read message |
| * adjust the write offset |
| */ |
| if (num_iterations > 1) { |
| num_components = instr->num_components - 2; |
| imm_offset++; |
| } |
| } |
| break; |
| } |
| |
| case nir_intrinsic_load_output: |
| case nir_intrinsic_load_per_vertex_output: { |
| fs_reg indirect_offset = get_indirect_offset(instr); |
| unsigned imm_offset = instr->const_index[0]; |
| unsigned first_component = nir_intrinsic_component(instr); |
| |
| fs_inst *inst; |
| if (indirect_offset.file == BAD_FILE) { |
| /* Replicate the patch handle to all enabled channels */ |
| fs_reg patch_handle = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| bld.MOV(patch_handle, |
| retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD)); |
| |
| if (imm_offset == 0) { |
| /* This is a read of gl_TessLevelInner[], which lives in the |
| * Patch URB header. The layout depends on the domain. |
| */ |
| dst.type = BRW_REGISTER_TYPE_F; |
| switch (tcs_key->tes_primitive_mode) { |
| case GL_QUADS: { |
| /* DWords 3-2 (reversed) */ |
| fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_F, 4); |
| |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, tmp, patch_handle); |
| inst->offset = 0; |
| inst->mlen = 1; |
| inst->regs_written = 4; |
| |
| /* dst.xy = tmp.wz */ |
| bld.MOV(dst, offset(tmp, bld, 3)); |
| bld.MOV(offset(dst, bld, 1), offset(tmp, bld, 2)); |
| break; |
| } |
| case GL_TRIANGLES: |
| /* DWord 4; hardcode offset = 1 and regs_written = 1 */ |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, dst, patch_handle); |
| inst->offset = 1; |
| inst->mlen = 1; |
| inst->regs_written = 1; |
| break; |
| case GL_ISOLINES: |
| /* All channels are undefined. */ |
| break; |
| default: |
| unreachable("Bogus tessellation domain"); |
| } |
| } else if (imm_offset == 1) { |
| /* This is a read of gl_TessLevelOuter[], which lives in the |
| * Patch URB header. The layout depends on the domain. |
| */ |
| dst.type = BRW_REGISTER_TYPE_F; |
| |
| fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_F, 4); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, tmp, patch_handle); |
| inst->offset = 1; |
| inst->mlen = 1; |
| inst->regs_written = 4; |
| |
| /* Reswizzle: WZYX */ |
| fs_reg srcs[4] = { |
| offset(tmp, bld, 3), |
| offset(tmp, bld, 2), |
| offset(tmp, bld, 1), |
| offset(tmp, bld, 0), |
| }; |
| |
| unsigned num_components; |
| switch (tcs_key->tes_primitive_mode) { |
| case GL_QUADS: |
| num_components = 4; |
| break; |
| case GL_TRIANGLES: |
| num_components = 3; |
| break; |
| case GL_ISOLINES: |
| /* Isolines are not reversed; swizzle .zw -> .xy */ |
| srcs[0] = offset(tmp, bld, 2); |
| srcs[1] = offset(tmp, bld, 3); |
| num_components = 2; |
| break; |
| default: |
| unreachable("Bogus tessellation domain"); |
| } |
| bld.LOAD_PAYLOAD(dst, srcs, num_components, 0); |
| } else { |
| if (first_component != 0) { |
| unsigned read_components = |
| instr->num_components + first_component; |
| fs_reg tmp = bld.vgrf(dst.type, read_components); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, tmp, |
| patch_handle); |
| inst->regs_written = read_components; |
| for (unsigned i = 0; i < instr->num_components; i++) { |
| bld.MOV(offset(dst, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, dst, |
| patch_handle); |
| inst->regs_written = instr->num_components; |
| } |
| inst->offset = imm_offset; |
| inst->mlen = 1; |
| } |
| } else { |
| /* Indirect indexing - use per-slot offsets as well. */ |
| const fs_reg srcs[] = { |
| retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD), |
| indirect_offset |
| }; |
| fs_reg payload = bld.vgrf(BRW_REGISTER_TYPE_UD, 2); |
| bld.LOAD_PAYLOAD(payload, srcs, ARRAY_SIZE(srcs), 0); |
| if (first_component != 0) { |
| unsigned read_components = |
| instr->num_components + first_component; |
| fs_reg tmp = bld.vgrf(dst.type, read_components); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, tmp, |
| payload); |
| inst->regs_written = read_components; |
| for (unsigned i = 0; i < instr->num_components; i++) { |
| bld.MOV(offset(dst, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, dst, |
| payload); |
| inst->regs_written = instr->num_components; |
| } |
| inst->offset = imm_offset; |
| inst->mlen = 2; |
| } |
| break; |
| } |
| |
| case nir_intrinsic_store_output: |
| case nir_intrinsic_store_per_vertex_output: { |
| fs_reg value = get_nir_src(instr->src[0]); |
| bool is_64bit = (instr->src[0].is_ssa ? |
| instr->src[0].ssa->bit_size : instr->src[0].reg.reg->bit_size) == 64; |
| fs_reg indirect_offset = get_indirect_offset(instr); |
| unsigned imm_offset = instr->const_index[0]; |
| unsigned swiz = BRW_SWIZZLE_XYZW; |
| unsigned mask = instr->const_index[1]; |
| unsigned header_regs = 0; |
| fs_reg srcs[7]; |
| srcs[header_regs++] = retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD); |
| |
| if (indirect_offset.file != BAD_FILE) { |
| srcs[header_regs++] = indirect_offset; |
| } else if (!is_passthrough_shader) { |
| if (imm_offset == 0) { |
| value.type = BRW_REGISTER_TYPE_F; |
| |
| mask &= (1 << tesslevel_inner_components(tcs_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 (tcs_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. |
| */ |
| mask = writemask_for_backwards_vector(mask); |
| swiz = BRW_SWIZZLE4(0, 0, 1, 0); |
| 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) { |
| /* 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. |
| */ |
| value.type = BRW_REGISTER_TYPE_F; |
| |
| mask &= (1 << tesslevel_outer_components(tcs_key->tes_primitive_mode)) - 1; |
| |
| if (tcs_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); |
| } |
| } |
| } |
| |
| if (mask == 0) |
| break; |
| |
| unsigned num_components = util_last_bit(mask); |
| enum opcode opcode; |
| |
| /* We can only pack two 64-bit components in a single message, so send |
| * 2 messages if we have more components |
| */ |
| unsigned num_iterations = 1; |
| unsigned iter_components = num_components; |
| unsigned first_component = nir_intrinsic_component(instr); |
| if (is_64bit) { |
| first_component = first_component / 2; |
| if (instr->num_components > 2) { |
| num_iterations = 2; |
| iter_components = 2; |
| } |
| } |
| |
| /* 64-bit data needs to me shuffled before we can write it to the URB. |
| * We will use this temporary to shuffle the components in each |
| * iteration. |
| */ |
| fs_reg tmp = |
| fs_reg(VGRF, alloc.allocate(2 * iter_components), value.type); |
| |
| mask = mask << first_component; |
| |
| for (unsigned iter = 0; iter < num_iterations; iter++) { |
| if (!is_64bit && mask != WRITEMASK_XYZW) { |
| srcs[header_regs++] = brw_imm_ud(mask << 16); |
| opcode = indirect_offset.file != BAD_FILE ? |
| SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT : |
| SHADER_OPCODE_URB_WRITE_SIMD8_MASKED; |
| } else if (is_64bit && ((mask & WRITEMASK_XY) != WRITEMASK_XY)) { |
| /* Expand the 64-bit mask to 32-bit channels. We only handle |
| * two channels in each iteration, so we only care about X/Y. |
| */ |
| unsigned mask32 = 0; |
| if (mask & WRITEMASK_X) |
| mask32 |= WRITEMASK_XY; |
| if (mask & WRITEMASK_Y) |
| mask32 |= WRITEMASK_ZW; |
| |
| /* If the mask does not include any of the channels X or Y there |
| * is nothing to do in this iteration. Move on to the next couple |
| * of 64-bit channels. |
| */ |
| if (!mask32) { |
| mask >>= 2; |
| imm_offset++; |
| continue; |
| } |
| |
| srcs[header_regs++] = brw_imm_ud(mask32 << 16); |
| opcode = indirect_offset.file != BAD_FILE ? |
| SHADER_OPCODE_URB_WRITE_SIMD8_MASKED_PER_SLOT : |
| SHADER_OPCODE_URB_WRITE_SIMD8_MASKED; |
| } else { |
| opcode = indirect_offset.file != BAD_FILE ? |
| SHADER_OPCODE_URB_WRITE_SIMD8_PER_SLOT : |
| SHADER_OPCODE_URB_WRITE_SIMD8; |
| } |
| |
| for (unsigned i = 0; i < iter_components; i++) { |
| if (!(mask & (1 << (i + first_component)))) |
| continue; |
| |
| if (!is_64bit) { |
| srcs[header_regs + i + first_component] = |
| offset(value, bld, BRW_GET_SWZ(swiz, i)); |
| } else { |
| /* We need to shuffle the 64-bit data to match the layout |
| * expected by our 32-bit URB write messages. We use a temporary |
| * for that. |
| */ |
| unsigned channel = BRW_GET_SWZ(swiz, iter * 2 + i); |
| shuffle_64bit_data_for_32bit_write(bld, |
| retype(offset(tmp, bld, 2 * i), BRW_REGISTER_TYPE_F), |
| retype(offset(value, bld, 2 * channel), BRW_REGISTER_TYPE_DF), |
| 1); |
| |
| /* Now copy the data to the destination */ |
| fs_reg dest = fs_reg(VGRF, alloc.allocate(2), value.type); |
| unsigned idx = 2 * i; |
| bld.MOV(dest, offset(tmp, bld, idx)); |
| bld.MOV(offset(dest, bld, 1), offset(tmp, bld, idx + 1)); |
| srcs[header_regs + idx + first_component * 2] = dest; |
| srcs[header_regs + idx + 1 + first_component * 2] = |
| offset(dest, bld, 1); |
| } |
| } |
| |
| unsigned mlen = |
| header_regs + (is_64bit ? 2 * iter_components : iter_components) + |
| (is_64bit ? 2 * first_component : first_component); |
| fs_reg payload = |
| bld.vgrf(BRW_REGISTER_TYPE_UD, mlen); |
| bld.LOAD_PAYLOAD(payload, srcs, mlen, header_regs); |
| |
| fs_inst *inst = bld.emit(opcode, bld.null_reg_ud(), payload); |
| inst->offset = imm_offset; |
| inst->mlen = mlen; |
| |
| /* If this is a 64-bit attribute, select the next two 64-bit channels |
| * to be handled in the next iteration. |
| */ |
| if (is_64bit) { |
| mask >>= 2; |
| imm_offset++; |
| } |
| } |
| break; |
| } |
| |
| default: |
| nir_emit_intrinsic(bld, instr); |
| break; |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_tes_intrinsic(const fs_builder &bld, |
| nir_intrinsic_instr *instr) |
| { |
| assert(stage == MESA_SHADER_TESS_EVAL); |
| struct brw_tes_prog_data *tes_prog_data = (struct brw_tes_prog_data *) prog_data; |
| |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| switch (instr->intrinsic) { |
| case nir_intrinsic_load_primitive_id: |
| bld.MOV(dest, fs_reg(brw_vec1_grf(0, 1))); |
| break; |
| case nir_intrinsic_load_tess_coord: |
| /* gl_TessCoord is part of the payload in g1-3 */ |
| for (unsigned i = 0; i < 3; i++) { |
| bld.MOV(offset(dest, bld, i), fs_reg(brw_vec8_grf(1 + i, 0))); |
| } |
| break; |
| |
| case nir_intrinsic_load_tess_level_outer: |
| /* When the TES reads gl_TessLevelOuter, we ensure that the patch header |
| * appears as a push-model input. So, we can simply use the ATTR file |
| * rather than issuing URB read messages. The data is stored in the |
| * high DWords in reverse order - DWord 7 contains .x, DWord 6 contains |
| * .y, and so on. |
| */ |
| switch (tes_prog_data->domain) { |
| case BRW_TESS_DOMAIN_QUAD: |
| for (unsigned i = 0; i < 4; i++) |
| bld.MOV(offset(dest, bld, i), component(fs_reg(ATTR, 0), 7 - i)); |
| break; |
| case BRW_TESS_DOMAIN_TRI: |
| for (unsigned i = 0; i < 3; i++) |
| bld.MOV(offset(dest, bld, i), component(fs_reg(ATTR, 0), 7 - i)); |
| break; |
| case BRW_TESS_DOMAIN_ISOLINE: |
| for (unsigned i = 0; i < 2; i++) |
| bld.MOV(offset(dest, bld, i), component(fs_reg(ATTR, 0), 6 + i)); |
| break; |
| } |
| break; |
| |
| case nir_intrinsic_load_tess_level_inner: |
| /* When the TES reads gl_TessLevelInner, we ensure that the patch header |
| * appears as a push-model input. So, we can simply use the ATTR file |
| * rather than issuing URB read messages. |
| */ |
| switch (tes_prog_data->domain) { |
| case BRW_TESS_DOMAIN_QUAD: |
| bld.MOV(dest, component(fs_reg(ATTR, 0), 3)); |
| bld.MOV(offset(dest, bld, 1), component(fs_reg(ATTR, 0), 2)); |
| break; |
| case BRW_TESS_DOMAIN_TRI: |
| bld.MOV(dest, component(fs_reg(ATTR, 0), 4)); |
| break; |
| case BRW_TESS_DOMAIN_ISOLINE: |
| /* ignore - value is undefined */ |
| break; |
| } |
| break; |
| |
| case nir_intrinsic_load_input: |
| case nir_intrinsic_load_per_vertex_input: { |
| fs_reg indirect_offset = get_indirect_offset(instr); |
| unsigned imm_offset = instr->const_index[0]; |
| unsigned first_component = nir_intrinsic_component(instr); |
| |
| if (type_sz(dest.type) == 8) { |
| first_component = first_component / 2; |
| } |
| |
| fs_inst *inst; |
| if (indirect_offset.file == BAD_FILE) { |
| /* Arbitrarily only push up to 32 vec4 slots worth of data, |
| * which is 16 registers (since each holds 2 vec4 slots). |
| */ |
| const unsigned max_push_slots = 32; |
| if (imm_offset < max_push_slots) { |
| fs_reg src = fs_reg(ATTR, imm_offset / 2, dest.type); |
| for (int i = 0; i < instr->num_components; i++) { |
| unsigned comp = 16 / type_sz(dest.type) * (imm_offset % 2) + |
| i + first_component; |
| bld.MOV(offset(dest, bld, i), component(src, comp)); |
| } |
| tes_prog_data->base.urb_read_length = |
| MAX2(tes_prog_data->base.urb_read_length, |
| DIV_ROUND_UP(imm_offset + 1, 2)); |
| } else { |
| /* Replicate the patch handle to all enabled channels */ |
| const fs_reg srcs[] = { |
| retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD) |
| }; |
| fs_reg patch_handle = bld.vgrf(BRW_REGISTER_TYPE_UD, 1); |
| bld.LOAD_PAYLOAD(patch_handle, srcs, ARRAY_SIZE(srcs), 0); |
| |
| if (first_component != 0) { |
| unsigned read_components = |
| instr->num_components + first_component; |
| fs_reg tmp = bld.vgrf(dest.type, read_components); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, tmp, |
| patch_handle); |
| inst->regs_written = read_components; |
| for (unsigned i = 0; i < instr->num_components; i++) { |
| bld.MOV(offset(dest, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8, dest, |
| patch_handle); |
| inst->regs_written = instr->num_components; |
| } |
| inst->mlen = 1; |
| inst->offset = imm_offset; |
| } |
| } else { |
| /* Indirect indexing - use per-slot offsets as well. */ |
| |
| /* We can only read two double components with each URB read, so |
| * we send two read messages in that case, each one loading up to |
| * two double components. |
| */ |
| unsigned num_iterations = 1; |
| unsigned num_components = instr->num_components; |
| fs_reg orig_dest = dest; |
| if (type_sz(dest.type) == 8) { |
| if (instr->num_components > 2) { |
| num_iterations = 2; |
| num_components = 2; |
| } |
| fs_reg tmp = fs_reg(VGRF, alloc.allocate(4), dest.type); |
| dest = tmp; |
| } |
| |
| for (unsigned iter = 0; iter < num_iterations; iter++) { |
| const fs_reg srcs[] = { |
| retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UD), |
| indirect_offset |
| }; |
| fs_reg payload = bld.vgrf(BRW_REGISTER_TYPE_UD, 2); |
| bld.LOAD_PAYLOAD(payload, srcs, ARRAY_SIZE(srcs), 0); |
| |
| if (first_component != 0) { |
| unsigned read_components = |
| num_components + first_component; |
| fs_reg tmp = bld.vgrf(dest.type, read_components); |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, tmp, |
| payload); |
| for (unsigned i = 0; i < num_components; i++) { |
| bld.MOV(offset(dest, bld, i), |
| offset(tmp, bld, i + first_component)); |
| } |
| } else { |
| inst = bld.emit(SHADER_OPCODE_URB_READ_SIMD8_PER_SLOT, dest, |
| payload); |
| } |
| inst->mlen = 2; |
| inst->offset = imm_offset; |
| inst->regs_written = |
| ((num_components + first_component) * type_sz(dest.type) / 4); |
| |
| /* If we are reading 64-bit data using 32-bit read messages we need |
| * build proper 64-bit data elements by shuffling the low and high |
| * 32-bit components around like we do for other things like UBOs |
| * or SSBOs. |
| */ |
| if (type_sz(dest.type) == 8) { |
| shuffle_32bit_load_result_to_64bit_data( |
| bld, dest, retype(dest, BRW_REGISTER_TYPE_F), num_components); |
| |
| for (unsigned c = 0; c < num_components; c++) { |
| bld.MOV(offset(orig_dest, bld, iter * 2 + c), |
| offset(dest, bld, c)); |
| } |
| } |
| |
| /* If we are loading double data and we need a second read message |
| * adjust the offset |
| */ |
| if (num_iterations > 1) { |
| num_components = instr->num_components - 2; |
| imm_offset++; |
| } |
| } |
| } |
| break; |
| } |
| default: |
| nir_emit_intrinsic(bld, instr); |
| break; |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_gs_intrinsic(const fs_builder &bld, |
| nir_intrinsic_instr *instr) |
| { |
| assert(stage == MESA_SHADER_GEOMETRY); |
| fs_reg indirect_offset; |
| |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| switch (instr->intrinsic) { |
| case nir_intrinsic_load_primitive_id: |
| assert(stage == MESA_SHADER_GEOMETRY); |
| assert(((struct brw_gs_prog_data *)prog_data)->include_primitive_id); |
| bld.MOV(retype(dest, BRW_REGISTER_TYPE_UD), |
| retype(fs_reg(brw_vec8_grf(2, 0)), BRW_REGISTER_TYPE_UD)); |
| break; |
| |
| case nir_intrinsic_load_input: |
| unreachable("load_input intrinsics are invalid for the GS stage"); |
| |
| case nir_intrinsic_load_per_vertex_input: |
| emit_gs_input_load(dest, instr->src[0], instr->const_index[0], |
| instr->src[1], instr->num_components, |
| nir_intrinsic_component(instr)); |
| break; |
| |
| case nir_intrinsic_emit_vertex_with_counter: |
| emit_gs_vertex(instr->src[0], instr->const_index[0]); |
| break; |
| |
| case nir_intrinsic_end_primitive_with_counter: |
| emit_gs_end_primitive(instr->src[0]); |
| break; |
| |
| case nir_intrinsic_set_vertex_count: |
| bld.MOV(this->final_gs_vertex_count, get_nir_src(instr->src[0])); |
| break; |
| |
| case nir_intrinsic_load_invocation_id: { |
| fs_reg val = nir_system_values[SYSTEM_VALUE_INVOCATION_ID]; |
| assert(val.file != BAD_FILE); |
| dest.type = val.type; |
| bld.MOV(dest, val); |
| break; |
| } |
| |
| default: |
| nir_emit_intrinsic(bld, instr); |
| break; |
| } |
| } |
| |
| /** |
| * Fetch the current render target layer index. |
| */ |
| static fs_reg |
| fetch_render_target_array_index(const fs_builder &bld) |
| { |
| if (bld.shader->devinfo->gen >= 6) { |
| /* The render target array index is provided in the thread payload as |
| * bits 26:16 of r0.0. |
| */ |
| const fs_reg idx = bld.vgrf(BRW_REGISTER_TYPE_UD); |
| bld.AND(idx, brw_uw1_reg(BRW_GENERAL_REGISTER_FILE, 0, 1), |
| brw_imm_uw(0x7ff)); |
| return idx; |
| } else { |
| /* Pre-SNB we only ever render into the first layer of the framebuffer |
| * since layered rendering is not implemented. |
| */ |
| return brw_imm_ud(0); |
| } |
| } |
| |
| /** |
| * Fake non-coherent framebuffer read implemented using TXF to fetch from the |
| * framebuffer at the current fragment coordinates and sample index. |
| */ |
| fs_inst * |
| fs_visitor::emit_non_coherent_fb_read(const fs_builder &bld, const fs_reg &dst, |
| unsigned target) |
| { |
| const struct brw_device_info *devinfo = bld.shader->devinfo; |
| |
| assert(bld.shader->stage == MESA_SHADER_FRAGMENT); |
| const brw_wm_prog_key *wm_key = |
| reinterpret_cast<const brw_wm_prog_key *>(key); |
| assert(!wm_key->coherent_fb_fetch); |
| const brw_wm_prog_data *wm_prog_data = |
| reinterpret_cast<const brw_wm_prog_data *>(stage_prog_data); |
| |
| /* Calculate the surface index relative to the start of the texture binding |
| * table block, since that's what the texturing messages expect. |
| */ |
| const unsigned surface = target + |
| wm_prog_data->binding_table.render_target_read_start - |
| wm_prog_data->base.binding_table.texture_start; |
| |
| brw_mark_surface_used( |
| bld.shader->stage_prog_data, |
| wm_prog_data->binding_table.render_target_read_start + target); |
| |
| /* Calculate the fragment coordinates. */ |
| const fs_reg coords = bld.vgrf(BRW_REGISTER_TYPE_UD, 3); |
| bld.MOV(offset(coords, bld, 0), pixel_x); |
| bld.MOV(offset(coords, bld, 1), pixel_y); |
| bld.MOV(offset(coords, bld, 2), fetch_render_target_array_index(bld)); |
| |
| /* Calculate the sample index and MCS payload when multisampling. Luckily |
| * the MCS fetch message behaves deterministically for UMS surfaces, so it |
| * shouldn't be necessary to recompile based on whether the framebuffer is |
| * CMS or UMS. |
| */ |
| if (wm_key->multisample_fbo && |
| nir_system_values[SYSTEM_VALUE_SAMPLE_ID].file == BAD_FILE) |
| nir_system_values[SYSTEM_VALUE_SAMPLE_ID] = *emit_sampleid_setup(); |
| |
| const fs_reg sample = nir_system_values[SYSTEM_VALUE_SAMPLE_ID]; |
| const fs_reg mcs = wm_key->multisample_fbo ? |
| emit_mcs_fetch(coords, 3, brw_imm_ud(surface)) : fs_reg(); |
| |
| /* Use either a normal or a CMS texel fetch message depending on whether |
| * the framebuffer is single or multisample. On SKL+ use the wide CMS |
| * message just in case the framebuffer uses 16x multisampling, it should |
| * be equivalent to the normal CMS fetch for lower multisampling modes. |
| */ |
| const opcode op = !wm_key->multisample_fbo ? SHADER_OPCODE_TXF_LOGICAL : |
| devinfo->gen >= 9 ? SHADER_OPCODE_TXF_CMS_W_LOGICAL : |
| SHADER_OPCODE_TXF_CMS_LOGICAL; |
| |
| /* Emit the instruction. */ |
| const fs_reg srcs[] = { coords, fs_reg(), brw_imm_ud(0), fs_reg(), |
| sample, mcs, |
| brw_imm_ud(surface), brw_imm_ud(0), |
| fs_reg(), brw_imm_ud(3), brw_imm_ud(0) }; |
| STATIC_ASSERT(ARRAY_SIZE(srcs) == TEX_LOGICAL_NUM_SRCS); |
| |
| fs_inst *inst = bld.emit(op, dst, srcs, ARRAY_SIZE(srcs)); |
| inst->regs_written = 4 * inst->dst.component_size(inst->exec_size) / |
| REG_SIZE; |
| |
| return inst; |
| } |
| |
| /** |
| * Actual coherent framebuffer read implemented using the native render target |
| * read message. Requires SKL+. |
| */ |
| static fs_inst * |
| emit_coherent_fb_read(const fs_builder &bld, const fs_reg &dst, unsigned target) |
| { |
| assert(bld.shader->devinfo->gen >= 9); |
| fs_inst *inst = bld.emit(FS_OPCODE_FB_READ_LOGICAL, dst); |
| inst->target = target; |
| inst->regs_written = 4 * inst->dst.component_size(inst->exec_size) / |
| REG_SIZE; |
| |
| return inst; |
| } |
| |
| static fs_reg |
| alloc_temporary(const fs_builder &bld, unsigned size, fs_reg *regs, unsigned n) |
| { |
| if (n && regs[0].file != BAD_FILE) { |
| return regs[0]; |
| |
| } else { |
| const fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_F, size); |
| |
| for (unsigned i = 0; i < n; i++) |
| regs[i] = tmp; |
| |
| return tmp; |
| } |
| } |
| |
| static fs_reg |
| alloc_frag_output(fs_visitor *v, unsigned location) |
| { |
| assert(v->stage == MESA_SHADER_FRAGMENT); |
| const brw_wm_prog_key *const key = |
| reinterpret_cast<const brw_wm_prog_key *>(v->key); |
| const unsigned l = GET_FIELD(location, BRW_NIR_FRAG_OUTPUT_LOCATION); |
| const unsigned i = GET_FIELD(location, BRW_NIR_FRAG_OUTPUT_INDEX); |
| |
| if (i > 0 || (key->force_dual_color_blend && l == FRAG_RESULT_DATA1)) |
| return alloc_temporary(v->bld, 4, &v->dual_src_output, 1); |
| |
| else if (l == FRAG_RESULT_COLOR) |
| return alloc_temporary(v->bld, 4, v->outputs, |
| MAX2(key->nr_color_regions, 1)); |
| |
| else if (l == FRAG_RESULT_DEPTH) |
| return alloc_temporary(v->bld, 1, &v->frag_depth, 1); |
| |
| else if (l == FRAG_RESULT_STENCIL) |
| return alloc_temporary(v->bld, 1, &v->frag_stencil, 1); |
| |
| else if (l == FRAG_RESULT_SAMPLE_MASK) |
| return alloc_temporary(v->bld, 1, &v->sample_mask, 1); |
| |
| else if (l >= FRAG_RESULT_DATA0 && |
| l < FRAG_RESULT_DATA0 + BRW_MAX_DRAW_BUFFERS) |
| return alloc_temporary(v->bld, 4, |
| &v->outputs[l - FRAG_RESULT_DATA0], 1); |
| |
| else |
| unreachable("Invalid location"); |
| } |
| |
| void |
| fs_visitor::nir_emit_fs_intrinsic(const fs_builder &bld, |
| nir_intrinsic_instr *instr) |
| { |
| assert(stage == MESA_SHADER_FRAGMENT); |
| |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| switch (instr->intrinsic) { |
| case nir_intrinsic_load_front_face: |
| bld.MOV(retype(dest, BRW_REGISTER_TYPE_D), |
| *emit_frontfacing_interpolation()); |
| break; |
| |
| case nir_intrinsic_load_sample_pos: { |
| fs_reg sample_pos = nir_system_values[SYSTEM_VALUE_SAMPLE_POS]; |
| assert(sample_pos.file != BAD_FILE); |
| dest.type = sample_pos.type; |
| bld.MOV(dest, sample_pos); |
| bld.MOV(offset(dest, bld, 1), offset(sample_pos, bld, 1)); |
| break; |
| } |
| |
| case nir_intrinsic_load_helper_invocation: |
| case nir_intrinsic_load_sample_mask_in: |
| case nir_intrinsic_load_sample_id: { |
| gl_system_value sv = nir_system_value_from_intrinsic(instr->intrinsic); |
| fs_reg val = nir_system_values[sv]; |
| assert(val.file != BAD_FILE); |
| dest.type = val.type; |
| bld.MOV(dest, val); |
| break; |
| } |
| |
| case nir_intrinsic_store_output: { |
| const fs_reg src = get_nir_src(instr->src[0]); |
| const nir_const_value *const_offset = nir_src_as_const_value(instr->src[1]); |
| assert(const_offset && "Indirect output stores not allowed"); |
| const unsigned location = nir_intrinsic_base(instr) + |
| SET_FIELD(const_offset->u32[0], BRW_NIR_FRAG_OUTPUT_LOCATION); |
| const fs_reg new_dest = retype(alloc_frag_output(this, location), |
| src.type); |
| |
| for (unsigned j = 0; j < instr->num_components; j++) |
| bld.MOV(offset(new_dest, bld, nir_intrinsic_component(instr) + j), |
| offset(src, bld, j)); |
| |
| break; |
| } |
| |
| case nir_intrinsic_load_output: { |
| const unsigned l = GET_FIELD(nir_intrinsic_base(instr), |
| BRW_NIR_FRAG_OUTPUT_LOCATION); |
| assert(l >= FRAG_RESULT_DATA0); |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[0]); |
| assert(const_offset && "Indirect output loads not allowed"); |
| const unsigned target = l - FRAG_RESULT_DATA0 + const_offset->u32[0]; |
| const fs_reg tmp = bld.vgrf(dest.type, 4); |
| |
| if (reinterpret_cast<const brw_wm_prog_key *>(key)->coherent_fb_fetch) |
| emit_coherent_fb_read(bld, tmp, target); |
| else |
| emit_non_coherent_fb_read(bld, tmp, target); |
| |
| for (unsigned j = 0; j < instr->num_components; j++) { |
| bld.MOV(offset(dest, bld, j), |
| offset(tmp, bld, nir_intrinsic_component(instr) + j)); |
| } |
| |
| break; |
| } |
| |
| case nir_intrinsic_discard: |
| case nir_intrinsic_discard_if: { |
| /* We track our discarded pixels in f0.1. By predicating on it, we can |
| * update just the flag bits that aren't yet discarded. If there's no |
| * condition, we emit a CMP of g0 != g0, so all currently executing |
| * channels will get turned off. |
| */ |
| fs_inst *cmp; |
| if (instr->intrinsic == nir_intrinsic_discard_if) { |
| cmp = bld.CMP(bld.null_reg_f(), get_nir_src(instr->src[0]), |
| brw_imm_d(0), BRW_CONDITIONAL_Z); |
| } else { |
| fs_reg some_reg = fs_reg(retype(brw_vec8_grf(0, 0), |
| BRW_REGISTER_TYPE_UW)); |
| cmp = bld.CMP(bld.null_reg_f(), some_reg, some_reg, BRW_CONDITIONAL_NZ); |
| } |
| cmp->predicate = BRW_PREDICATE_NORMAL; |
| cmp->flag_subreg = 1; |
| |
| if (devinfo->gen >= 6) { |
| emit_discard_jump(); |
| } |
| break; |
| } |
| |
| case nir_intrinsic_load_input: { |
| /* load_input is only used for flat inputs */ |
| unsigned base = nir_intrinsic_base(instr); |
| unsigned component = nir_intrinsic_component(instr); |
| unsigned num_components = instr->num_components; |
| enum brw_reg_type type = dest.type; |
| |
| /* Special case fields in the VUE header */ |
| if (base == VARYING_SLOT_LAYER) |
| component = 1; |
| else if (base == VARYING_SLOT_VIEWPORT) |
| component = 2; |
| |
| if (nir_dest_bit_size(instr->dest) == 64) { |
| /* const_index is in 32-bit type size units that could not be aligned |
| * with DF. We need to read the double vector as if it was a float |
| * vector of twice the number of components to fetch the right data. |
| */ |
| type = BRW_REGISTER_TYPE_F; |
| num_components *= 2; |
| } |
| |
| for (unsigned int i = 0; i < num_components; i++) { |
| struct brw_reg interp = interp_reg(base, component + i); |
| interp = suboffset(interp, 3); |
| bld.emit(FS_OPCODE_CINTERP, offset(retype(dest, type), bld, i), |
| retype(fs_reg(interp), type)); |
| } |
| |
| if (nir_dest_bit_size(instr->dest) == 64) { |
| shuffle_32bit_load_result_to_64bit_data(bld, |
| dest, |
| retype(dest, type), |
| instr->num_components); |
| } |
| break; |
| } |
| |
| case nir_intrinsic_load_barycentric_pixel: |
| case nir_intrinsic_load_barycentric_centroid: |
| case nir_intrinsic_load_barycentric_sample: |
| /* Do nothing - load_interpolated_input handling will handle it later. */ |
| break; |
| |
| case nir_intrinsic_load_barycentric_at_sample: { |
| const glsl_interp_mode interpolation = |
| (enum glsl_interp_mode) nir_intrinsic_interp_mode(instr); |
| |
| nir_const_value *const_sample = nir_src_as_const_value(instr->src[0]); |
| |
| if (const_sample) { |
| unsigned msg_data = const_sample->i32[0] << 4; |
| |
| emit_pixel_interpolater_send(bld, |
| FS_OPCODE_INTERPOLATE_AT_SAMPLE, |
| dest, |
| fs_reg(), /* src */ |
| brw_imm_ud(msg_data), |
| interpolation); |
| } else { |
| const fs_reg sample_src = retype(get_nir_src(instr->src[0]), |
| BRW_REGISTER_TYPE_UD); |
| |
| if (nir_src_is_dynamically_uniform(instr->src[0])) { |
| const fs_reg sample_id = bld.emit_uniformize(sample_src); |
| const fs_reg msg_data = vgrf(glsl_type::uint_type); |
| bld.exec_all().group(1, 0) |
| .SHL(msg_data, sample_id, brw_imm_ud(4u)); |
| emit_pixel_interpolater_send(bld, |
| FS_OPCODE_INTERPOLATE_AT_SAMPLE, |
| dest, |
| fs_reg(), /* src */ |
| msg_data, |
| interpolation); |
| } else { |
| /* Make a loop that sends a message to the pixel interpolater |
| * for the sample number in each live channel. If there are |
| * multiple channels with the same sample number then these |
| * will be handled simultaneously with a single interation of |
| * the loop. |
| */ |
| bld.emit(BRW_OPCODE_DO); |
| |
| /* Get the next live sample number into sample_id_reg */ |
| const fs_reg sample_id = bld.emit_uniformize(sample_src); |
| |
| /* Set the flag register so that we can perform the send |
| * message on all channels that have the same sample number |
| */ |
| bld.CMP(bld.null_reg_ud(), |
| sample_src, sample_id, |
| BRW_CONDITIONAL_EQ); |
| const fs_reg msg_data = vgrf(glsl_type::uint_type); |
| bld.exec_all().group(1, 0) |
| .SHL(msg_data, sample_id, brw_imm_ud(4u)); |
| fs_inst *inst = |
| emit_pixel_interpolater_send(bld, |
| FS_OPCODE_INTERPOLATE_AT_SAMPLE, |
| dest, |
| fs_reg(), /* src */ |
| msg_data, |
| interpolation); |
| set_predicate(BRW_PREDICATE_NORMAL, inst); |
| |
| /* Continue the loop if there are any live channels left */ |
| set_predicate_inv(BRW_PREDICATE_NORMAL, |
| true, /* inverse */ |
| bld.emit(BRW_OPCODE_WHILE)); |
| } |
| } |
| break; |
| } |
| |
| case nir_intrinsic_load_barycentric_at_offset: { |
| const glsl_interp_mode interpolation = |
| (enum glsl_interp_mode) nir_intrinsic_interp_mode(instr); |
| |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[0]); |
| |
| if (const_offset) { |
| unsigned off_x = MIN2((int)(const_offset->f32[0] * 16), 7) & 0xf; |
| unsigned off_y = MIN2((int)(const_offset->f32[1] * 16), 7) & 0xf; |
| |
| emit_pixel_interpolater_send(bld, |
| FS_OPCODE_INTERPOLATE_AT_SHARED_OFFSET, |
| dest, |
| fs_reg(), /* src */ |
| brw_imm_ud(off_x | (off_y << 4)), |
| interpolation); |
| } else { |
| fs_reg src = vgrf(glsl_type::ivec2_type); |
| fs_reg offset_src = retype(get_nir_src(instr->src[0]), |
| BRW_REGISTER_TYPE_F); |
| for (int i = 0; i < 2; i++) { |
| fs_reg temp = vgrf(glsl_type::float_type); |
| bld.MUL(temp, offset(offset_src, bld, i), brw_imm_f(16.0f)); |
| fs_reg itemp = vgrf(glsl_type::int_type); |
| /* float to int */ |
| bld.MOV(itemp, temp); |
| |
| /* Clamp the upper end of the range to +7/16. |
| * ARB_gpu_shader5 requires that we support a maximum offset |
| * of +0.5, which isn't representable in a S0.4 value -- if |
| * we didn't clamp it, we'd end up with -8/16, which is the |
| * opposite of what the shader author wanted. |
| * |
| * This is legal due to ARB_gpu_shader5's quantization |
| * rules: |
| * |
| * "Not all values of <offset> may be supported; x and y |
| * offsets may be rounded to fixed-point values with the |
| * number of fraction bits given by the |
| * implementation-dependent constant |
| * FRAGMENT_INTERPOLATION_OFFSET_BITS" |
| */ |
| set_condmod(BRW_CONDITIONAL_L, |
| bld.SEL(offset(src, bld, i), itemp, brw_imm_d(7))); |
| } |
| |
| const enum opcode opcode = FS_OPCODE_INTERPOLATE_AT_PER_SLOT_OFFSET; |
| emit_pixel_interpolater_send(bld, |
| opcode, |
| dest, |
| src, |
| brw_imm_ud(0u), |
| interpolation); |
| } |
| break; |
| } |
| |
| case nir_intrinsic_load_interpolated_input: { |
| if (nir_intrinsic_base(instr) == VARYING_SLOT_POS) { |
| emit_fragcoord_interpolation(dest); |
| break; |
| } |
| |
| assert(instr->src[0].ssa && |
| instr->src[0].ssa->parent_instr->type == nir_instr_type_intrinsic); |
| nir_intrinsic_instr *bary_intrinsic = |
| nir_instr_as_intrinsic(instr->src[0].ssa->parent_instr); |
| nir_intrinsic_op bary_intrin = bary_intrinsic->intrinsic; |
| enum glsl_interp_mode interp_mode = |
| (enum glsl_interp_mode) nir_intrinsic_interp_mode(bary_intrinsic); |
| fs_reg dst_xy; |
| |
| if (bary_intrin == nir_intrinsic_load_barycentric_at_offset || |
| bary_intrin == nir_intrinsic_load_barycentric_at_sample) { |
| /* Use the result of the PI message */ |
| dst_xy = retype(get_nir_src(instr->src[0]), BRW_REGISTER_TYPE_F); |
| } else { |
| /* Use the delta_xy values computed from the payload */ |
| enum brw_barycentric_mode bary = |
| brw_barycentric_mode(interp_mode, bary_intrin); |
| |
| dst_xy = this->delta_xy[bary]; |
| } |
| |
| for (unsigned int i = 0; i < instr->num_components; i++) { |
| fs_reg interp = |
| fs_reg(interp_reg(nir_intrinsic_base(instr), |
| nir_intrinsic_component(instr) + i)); |
| interp.type = BRW_REGISTER_TYPE_F; |
| dest.type = BRW_REGISTER_TYPE_F; |
| |
| if (devinfo->gen < 6 && interp_mode == INTERP_MODE_SMOOTH) { |
| fs_reg tmp = vgrf(glsl_type::float_type); |
| bld.emit(FS_OPCODE_LINTERP, tmp, dst_xy, interp); |
| bld.MUL(offset(dest, bld, i), tmp, this->pixel_w); |
| } else { |
| bld.emit(FS_OPCODE_LINTERP, offset(dest, bld, i), dst_xy, interp); |
| } |
| } |
| break; |
| } |
| |
| default: |
| nir_emit_intrinsic(bld, instr); |
| break; |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_cs_intrinsic(const fs_builder &bld, |
| nir_intrinsic_instr *instr) |
| { |
| assert(stage == MESA_SHADER_COMPUTE); |
| struct brw_cs_prog_data *cs_prog_data = |
| (struct brw_cs_prog_data *) prog_data; |
| |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| switch (instr->intrinsic) { |
| case nir_intrinsic_barrier: |
| emit_barrier(); |
| cs_prog_data->uses_barrier = true; |
| break; |
| |
| case nir_intrinsic_load_local_invocation_id: |
| case nir_intrinsic_load_work_group_id: { |
| gl_system_value sv = nir_system_value_from_intrinsic(instr->intrinsic); |
| fs_reg val = nir_system_values[sv]; |
| assert(val.file != BAD_FILE); |
| dest.type = val.type; |
| for (unsigned i = 0; i < 3; i++) |
| bld.MOV(offset(dest, bld, i), offset(val, bld, i)); |
| break; |
| } |
| |
| case nir_intrinsic_load_num_work_groups: { |
| const unsigned surface = |
| cs_prog_data->binding_table.work_groups_start; |
| |
| cs_prog_data->uses_num_work_groups = true; |
| |
| fs_reg surf_index = brw_imm_ud(surface); |
| brw_mark_surface_used(prog_data, surface); |
| |
| /* Read the 3 GLuint components of gl_NumWorkGroups */ |
| for (unsigned i = 0; i < 3; i++) { |
| fs_reg read_result = |
| emit_untyped_read(bld, surf_index, |
| brw_imm_ud(i << 2), |
| 1 /* dims */, 1 /* size */, |
| BRW_PREDICATE_NONE); |
| read_result.type = dest.type; |
| bld.MOV(dest, read_result); |
| dest = offset(dest, bld, 1); |
| } |
| break; |
| } |
| |
| case nir_intrinsic_shared_atomic_add: |
| nir_emit_shared_atomic(bld, BRW_AOP_ADD, instr); |
| break; |
| case nir_intrinsic_shared_atomic_imin: |
| nir_emit_shared_atomic(bld, BRW_AOP_IMIN, instr); |
| break; |
| case nir_intrinsic_shared_atomic_umin: |
| nir_emit_shared_atomic(bld, BRW_AOP_UMIN, instr); |
| break; |
| case nir_intrinsic_shared_atomic_imax: |
| nir_emit_shared_atomic(bld, BRW_AOP_IMAX, instr); |
| break; |
| case nir_intrinsic_shared_atomic_umax: |
| nir_emit_shared_atomic(bld, BRW_AOP_UMAX, instr); |
| break; |
| case nir_intrinsic_shared_atomic_and: |
| nir_emit_shared_atomic(bld, BRW_AOP_AND, instr); |
| break; |
| case nir_intrinsic_shared_atomic_or: |
| nir_emit_shared_atomic(bld, BRW_AOP_OR, instr); |
| break; |
| case nir_intrinsic_shared_atomic_xor: |
| nir_emit_shared_atomic(bld, BRW_AOP_XOR, instr); |
| break; |
| case nir_intrinsic_shared_atomic_exchange: |
| nir_emit_shared_atomic(bld, BRW_AOP_MOV, instr); |
| break; |
| case nir_intrinsic_shared_atomic_comp_swap: |
| nir_emit_shared_atomic(bld, BRW_AOP_CMPWR, instr); |
| break; |
| |
| case nir_intrinsic_load_shared: { |
| assert(devinfo->gen >= 7); |
| |
| fs_reg surf_index = brw_imm_ud(GEN7_BTI_SLM); |
| |
| /* Get the offset to read from */ |
| fs_reg offset_reg; |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[0]); |
| if (const_offset) { |
| offset_reg = brw_imm_ud(instr->const_index[0] + const_offset->u32[0]); |
| } else { |
| offset_reg = vgrf(glsl_type::uint_type); |
| bld.ADD(offset_reg, |
| retype(get_nir_src(instr->src[0]), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(instr->const_index[0])); |
| } |
| |
| /* Read the vector */ |
| do_untyped_vector_read(bld, dest, surf_index, offset_reg, |
| instr->num_components); |
| break; |
| } |
| |
| case nir_intrinsic_store_shared: { |
| assert(devinfo->gen >= 7); |
| |
| /* Block index */ |
| fs_reg surf_index = brw_imm_ud(GEN7_BTI_SLM); |
| |
| /* Value */ |
| fs_reg val_reg = get_nir_src(instr->src[0]); |
| |
| /* Writemask */ |
| unsigned writemask = instr->const_index[1]; |
| |
| /* get_nir_src() retypes to integer. Be wary of 64-bit types though |
| * since the untyped writes below operate in units of 32-bits, which |
| * means that we need to write twice as many components each time. |
| * Also, we have to suffle 64-bit data to be in the appropriate layout |
| * expected by our 32-bit write messages. |
| */ |
| unsigned type_size = 4; |
| unsigned bit_size = instr->src[0].is_ssa ? |
| instr->src[0].ssa->bit_size : instr->src[0].reg.reg->bit_size; |
| if (bit_size == 64) { |
| type_size = 8; |
| fs_reg tmp = |
| fs_reg(VGRF, alloc.allocate(alloc.sizes[val_reg.nr]), val_reg.type); |
| shuffle_64bit_data_for_32bit_write( |
| bld, |
| retype(tmp, BRW_REGISTER_TYPE_F), |
| retype(val_reg, BRW_REGISTER_TYPE_DF), |
| instr->num_components); |
| val_reg = tmp; |
| } |
| |
| unsigned type_slots = type_size / 4; |
| |
| /* Combine groups of consecutive enabled channels in one write |
| * message. We use ffs to find the first enabled channel and then ffs on |
| * the bit-inverse, down-shifted writemask to determine the length of |
| * the block of enabled bits. |
| */ |
| while (writemask) { |
| unsigned first_component = ffs(writemask) - 1; |
| unsigned length = ffs(~(writemask >> first_component)) - 1; |
| |
| /* We can't write more than 2 64-bit components at once. Limit the |
| * length of the write to what we can do and let the next iteration |
| * handle the rest |
| */ |
| if (type_size > 4) |
| length = MIN2(2, length); |
| |
| fs_reg offset_reg; |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[1]); |
| if (const_offset) { |
| offset_reg = brw_imm_ud(instr->const_index[0] + const_offset->u32[0] + |
| type_size * first_component); |
| } else { |
| offset_reg = vgrf(glsl_type::uint_type); |
| bld.ADD(offset_reg, |
| retype(get_nir_src(instr->src[1]), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(instr->const_index[0] + type_size * first_component)); |
| } |
| |
| emit_untyped_write(bld, surf_index, offset_reg, |
| offset(val_reg, bld, first_component * type_slots), |
| 1 /* dims */, length * type_slots, |
| BRW_PREDICATE_NONE); |
| |
| /* Clear the bits in the writemask that we just wrote, then try |
| * again to see if more channels are left. |
| */ |
| writemask &= (15 << (first_component + length)); |
| } |
| |
| break; |
| } |
| |
| default: |
| nir_emit_intrinsic(bld, instr); |
| break; |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_intrinsic(const fs_builder &bld, nir_intrinsic_instr *instr) |
| { |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| switch (instr->intrinsic) { |
| case nir_intrinsic_atomic_counter_inc: |
| case nir_intrinsic_atomic_counter_dec: |
| case nir_intrinsic_atomic_counter_read: { |
| if (stage == MESA_SHADER_FRAGMENT && |
| instr->intrinsic != nir_intrinsic_atomic_counter_read) |
| ((struct brw_wm_prog_data *)prog_data)->has_side_effects = true; |
| |
| /* Get the arguments of the atomic intrinsic. */ |
| const fs_reg offset = get_nir_src(instr->src[0]); |
| const unsigned surface = (stage_prog_data->binding_table.abo_start + |
| instr->const_index[0]); |
| fs_reg tmp; |
| |
| /* Emit a surface read or atomic op. */ |
| switch (instr->intrinsic) { |
| case nir_intrinsic_atomic_counter_read: |
| tmp = emit_untyped_read(bld, brw_imm_ud(surface), offset, 1, 1); |
| break; |
| |
| case nir_intrinsic_atomic_counter_inc: |
| tmp = emit_untyped_atomic(bld, brw_imm_ud(surface), offset, fs_reg(), |
| fs_reg(), 1, 1, BRW_AOP_INC); |
| break; |
| |
| case nir_intrinsic_atomic_counter_dec: |
| tmp = emit_untyped_atomic(bld, brw_imm_ud(surface), offset, fs_reg(), |
| fs_reg(), 1, 1, BRW_AOP_PREDEC); |
| break; |
| |
| default: |
| unreachable("Unreachable"); |
| } |
| |
| /* Assign the result. */ |
| bld.MOV(retype(dest, BRW_REGISTER_TYPE_UD), tmp); |
| |
| /* Mark the surface as used. */ |
| brw_mark_surface_used(stage_prog_data, surface); |
| break; |
| } |
| |
| case nir_intrinsic_image_load: |
| case nir_intrinsic_image_store: |
| case nir_intrinsic_image_atomic_add: |
| case nir_intrinsic_image_atomic_min: |
| case nir_intrinsic_image_atomic_max: |
| case nir_intrinsic_image_atomic_and: |
| case nir_intrinsic_image_atomic_or: |
| case nir_intrinsic_image_atomic_xor: |
| case nir_intrinsic_image_atomic_exchange: |
| case nir_intrinsic_image_atomic_comp_swap: { |
| using namespace image_access; |
| |
| if (stage == MESA_SHADER_FRAGMENT && |
| instr->intrinsic != nir_intrinsic_image_load) |
| ((struct brw_wm_prog_data *)prog_data)->has_side_effects = true; |
| |
| /* Get the referenced image variable and type. */ |
| const nir_variable *var = instr->variables[0]->var; |
| const glsl_type *type = var->type->without_array(); |
| const brw_reg_type base_type = get_image_base_type(type); |
| |
| /* Get some metadata from the image intrinsic. */ |
| const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic]; |
| const unsigned arr_dims = type->sampler_array ? 1 : 0; |
| const unsigned surf_dims = type->coordinate_components() - arr_dims; |
| const unsigned format = var->data.image.format; |
| |
| /* Get the arguments of the image intrinsic. */ |
| const fs_reg image = get_nir_image_deref(instr->variables[0]); |
| const fs_reg addr = retype(get_nir_src(instr->src[0]), |
| BRW_REGISTER_TYPE_UD); |
| const fs_reg src0 = (info->num_srcs >= 3 ? |
| retype(get_nir_src(instr->src[2]), base_type) : |
| fs_reg()); |
| const fs_reg src1 = (info->num_srcs >= 4 ? |
| retype(get_nir_src(instr->src[3]), base_type) : |
| fs_reg()); |
| fs_reg tmp; |
| |
| /* Emit an image load, store or atomic op. */ |
| if (instr->intrinsic == nir_intrinsic_image_load) |
| tmp = emit_image_load(bld, image, addr, surf_dims, arr_dims, format); |
| |
| else if (instr->intrinsic == nir_intrinsic_image_store) |
| emit_image_store(bld, image, addr, src0, surf_dims, arr_dims, |
| var->data.image.write_only ? GL_NONE : format); |
| |
| else |
| tmp = emit_image_atomic(bld, image, addr, src0, src1, |
| surf_dims, arr_dims, info->dest_components, |
| get_image_atomic_op(instr->intrinsic, type)); |
| |
| /* Assign the result. */ |
| for (unsigned c = 0; c < info->dest_components; ++c) |
| bld.MOV(offset(retype(dest, base_type), bld, c), |
| offset(tmp, bld, c)); |
| break; |
| } |
| |
| case nir_intrinsic_memory_barrier_atomic_counter: |
| case nir_intrinsic_memory_barrier_buffer: |
| case nir_intrinsic_memory_barrier_image: |
| case nir_intrinsic_memory_barrier: { |
| const fs_builder ubld = bld.group(8, 0); |
| const fs_reg tmp = ubld.vgrf(BRW_REGISTER_TYPE_UD, 2); |
| ubld.emit(SHADER_OPCODE_MEMORY_FENCE, tmp) |
| ->regs_written = 2; |
| break; |
| } |
| |
| case nir_intrinsic_group_memory_barrier: |
| case nir_intrinsic_memory_barrier_shared: |
| /* We treat these workgroup-level barriers as no-ops. This should be |
| * safe at present and as long as: |
| * |
| * - Memory access instructions are not subsequently reordered by the |
| * compiler back-end. |
| * |
| * - All threads from a given compute shader workgroup fit within a |
| * single subslice and therefore talk to the same HDC shared unit |
| * what supposedly guarantees ordering and coherency between threads |
| * from the same workgroup. This may change in the future when we |
| * start splitting workgroups across multiple subslices. |
| * |
| * - The context is not in fault-and-stream mode, which could cause |
| * memory transactions (including to SLM) prior to the barrier to be |
| * replayed after the barrier if a pagefault occurs. This shouldn't |
| * be a problem up to and including SKL because fault-and-stream is |
| * not usable due to hardware issues, but that's likely to change in |
| * the future. |
| */ |
| break; |
| |
| case nir_intrinsic_shader_clock: { |
| /* We cannot do anything if there is an event, so ignore it for now */ |
| fs_reg shader_clock = get_timestamp(bld); |
| const fs_reg srcs[] = { shader_clock.set_smear(0), shader_clock.set_smear(1) }; |
| |
| bld.LOAD_PAYLOAD(dest, srcs, ARRAY_SIZE(srcs), 0); |
| break; |
| } |
| |
| case nir_intrinsic_image_size: { |
| /* Get the referenced image variable and type. */ |
| const nir_variable *var = instr->variables[0]->var; |
| const glsl_type *type = var->type->without_array(); |
| |
| /* Get the size of the image. */ |
| const fs_reg image = get_nir_image_deref(instr->variables[0]); |
| const fs_reg size = offset(image, bld, BRW_IMAGE_PARAM_SIZE_OFFSET); |
| |
| /* For 1DArray image types, the array index is stored in the Z component. |
| * Fix this by swizzling the Z component to the Y component. |
| */ |
| const bool is_1d_array_image = |
| type->sampler_dimensionality == GLSL_SAMPLER_DIM_1D && |
| type->sampler_array; |
| |
| /* For CubeArray images, we should count the number of cubes instead |
| * of the number of faces. Fix it by dividing the (Z component) by 6. |
| */ |
| const bool is_cube_array_image = |
| type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE && |
| type->sampler_array; |
| |
| /* Copy all the components. */ |
| const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic]; |
| for (unsigned c = 0; c < info->dest_components; ++c) { |
| if ((int)c >= type->coordinate_components()) { |
| bld.MOV(offset(retype(dest, BRW_REGISTER_TYPE_D), bld, c), |
| brw_imm_d(1)); |
| } else if (c == 1 && is_1d_array_image) { |
| bld.MOV(offset(retype(dest, BRW_REGISTER_TYPE_D), bld, c), |
| offset(size, bld, 2)); |
| } else if (c == 2 && is_cube_array_image) { |
| bld.emit(SHADER_OPCODE_INT_QUOTIENT, |
| offset(retype(dest, BRW_REGISTER_TYPE_D), bld, c), |
| offset(size, bld, c), brw_imm_d(6)); |
| } else { |
| bld.MOV(offset(retype(dest, BRW_REGISTER_TYPE_D), bld, c), |
| offset(size, bld, c)); |
| } |
| } |
| |
| break; |
| } |
| |
| case nir_intrinsic_image_samples: |
| /* The driver does not support multi-sampled images. */ |
| bld.MOV(retype(dest, BRW_REGISTER_TYPE_D), brw_imm_d(1)); |
| break; |
| |
| case nir_intrinsic_load_uniform: { |
| /* Offsets are in bytes but they should always be multiples of 4 */ |
| assert(instr->const_index[0] % 4 == 0); |
| |
| fs_reg src(UNIFORM, instr->const_index[0] / 4, dest.type); |
| |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[0]); |
| if (const_offset) { |
| /* Offsets are in bytes but they should always be multiples of 4 */ |
| assert(const_offset->u32[0] % 4 == 0); |
| src.reg_offset = const_offset->u32[0] / 4; |
| |
| for (unsigned j = 0; j < instr->num_components; j++) { |
| bld.MOV(offset(dest, bld, j), offset(src, bld, j)); |
| } |
| } else { |
| fs_reg indirect = retype(get_nir_src(instr->src[0]), |
| BRW_REGISTER_TYPE_UD); |
| |
| /* We need to pass a size to the MOV_INDIRECT but we don't want it to |
| * go past the end of the uniform. In order to keep the n'th |
| * component from running past, we subtract off the size of all but |
| * one component of the vector. |
| */ |
| assert(instr->const_index[1] >= |
| instr->num_components * (int) type_sz(dest.type)); |
| unsigned read_size = instr->const_index[1] - |
| (instr->num_components - 1) * type_sz(dest.type); |
| |
| fs_reg indirect_chv_high_32bit; |
| bool is_chv_bxt_64bit = |
| (devinfo->is_cherryview || devinfo->is_broxton) && |
| type_sz(dest.type) == 8; |
| if (is_chv_bxt_64bit) { |
| indirect_chv_high_32bit = vgrf(glsl_type::uint_type); |
| /* Calculate indirect address to read high 32 bits */ |
| bld.ADD(indirect_chv_high_32bit, indirect, brw_imm_ud(4)); |
| } |
| |
| for (unsigned j = 0; j < instr->num_components; j++) { |
| if (!is_chv_bxt_64bit) { |
| bld.emit(SHADER_OPCODE_MOV_INDIRECT, |
| offset(dest, bld, j), offset(src, bld, j), |
| indirect, brw_imm_ud(read_size)); |
| } else { |
| bld.emit(SHADER_OPCODE_MOV_INDIRECT, |
| subscript(offset(dest, bld, j), BRW_REGISTER_TYPE_UD, 0), |
| offset(src, bld, j), |
| indirect, brw_imm_ud(read_size)); |
| |
| bld.emit(SHADER_OPCODE_MOV_INDIRECT, |
| subscript(offset(dest, bld, j), BRW_REGISTER_TYPE_UD, 1), |
| offset(src, bld, j), |
| indirect_chv_high_32bit, brw_imm_ud(read_size)); |
| } |
| } |
| } |
| break; |
| } |
| |
| case nir_intrinsic_load_ubo: { |
| nir_const_value *const_index = nir_src_as_const_value(instr->src[0]); |
| fs_reg surf_index; |
| |
| if (const_index) { |
| const unsigned index = stage_prog_data->binding_table.ubo_start + |
| const_index->u32[0]; |
| surf_index = brw_imm_ud(index); |
| brw_mark_surface_used(prog_data, index); |
| } else { |
| /* The block index is not a constant. Evaluate the index expression |
| * per-channel and add the base UBO index; we have to select a value |
| * from any live channel. |
| */ |
| surf_index = vgrf(glsl_type::uint_type); |
| bld.ADD(surf_index, get_nir_src(instr->src[0]), |
| brw_imm_ud(stage_prog_data->binding_table.ubo_start)); |
| surf_index = bld.emit_uniformize(surf_index); |
| |
| /* Assume this may touch any UBO. It would be nice to provide |
| * a tighter bound, but the array information is already lowered away. |
| */ |
| brw_mark_surface_used(prog_data, |
| stage_prog_data->binding_table.ubo_start + |
| nir->info.num_ubos - 1); |
| } |
| |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[1]); |
| if (const_offset == NULL) { |
| fs_reg base_offset = retype(get_nir_src(instr->src[1]), |
| BRW_REGISTER_TYPE_UD); |
| |
| for (int i = 0; i < instr->num_components; i++) |
| VARYING_PULL_CONSTANT_LOAD(bld, offset(dest, bld, i), surf_index, |
| base_offset, i * type_sz(dest.type)); |
| } else { |
| /* Even if we are loading doubles, a pull constant load will load |
| * a 32-bit vec4, so should only reserve vgrf space for that. If we |
| * need to load a full dvec4 we will have to emit 2 loads. This is |
| * similar to demote_pull_constants(), except that in that case we |
| * see individual accesses to each component of the vector and then |
| * we let CSE deal with duplicate loads. Here we see a vector access |
| * and we have to split it if necessary. |
| */ |
| const unsigned type_size = type_sz(dest.type); |
| const fs_reg packed_consts = bld.vgrf(BRW_REGISTER_TYPE_F); |
| for (unsigned c = 0; c < instr->num_components;) { |
| const unsigned base = const_offset->u32[0] + c * type_size; |
| |
| /* Number of usable components in the next 16B-aligned load */ |
| const unsigned count = MIN2(instr->num_components - c, |
| (16 - base % 16) / type_size); |
| |
| bld.exec_all() |
| .emit(FS_OPCODE_UNIFORM_PULL_CONSTANT_LOAD, |
| packed_consts, surf_index, brw_imm_ud(base & ~15)); |
| |
| const fs_reg consts = |
| retype(byte_offset(packed_consts, base & 15), dest.type); |
| |
| for (unsigned d = 0; d < count; d++) |
| bld.MOV(offset(dest, bld, c + d), component(consts, d)); |
| |
| c += count; |
| } |
| } |
| break; |
| } |
| |
| case nir_intrinsic_load_ssbo: { |
| assert(devinfo->gen >= 7); |
| |
| nir_const_value *const_uniform_block = |
| nir_src_as_const_value(instr->src[0]); |
| |
| fs_reg surf_index; |
| if (const_uniform_block) { |
| unsigned index = stage_prog_data->binding_table.ssbo_start + |
| const_uniform_block->u32[0]; |
| surf_index = brw_imm_ud(index); |
| brw_mark_surface_used(prog_data, index); |
| } else { |
| surf_index = vgrf(glsl_type::uint_type); |
| bld.ADD(surf_index, get_nir_src(instr->src[0]), |
| brw_imm_ud(stage_prog_data->binding_table.ssbo_start)); |
| |
| /* Assume this may touch any UBO. It would be nice to provide |
| * a tighter bound, but the array information is already lowered away. |
| */ |
| brw_mark_surface_used(prog_data, |
| stage_prog_data->binding_table.ssbo_start + |
| nir->info.num_ssbos - 1); |
| } |
| |
| fs_reg offset_reg; |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[1]); |
| if (const_offset) { |
| offset_reg = brw_imm_ud(const_offset->u32[0]); |
| } else { |
| offset_reg = get_nir_src(instr->src[1]); |
| } |
| |
| /* Read the vector */ |
| do_untyped_vector_read(bld, dest, surf_index, offset_reg, |
| instr->num_components); |
| |
| break; |
| } |
| |
| case nir_intrinsic_store_ssbo: { |
| assert(devinfo->gen >= 7); |
| |
| if (stage == MESA_SHADER_FRAGMENT) |
| ((struct brw_wm_prog_data *)prog_data)->has_side_effects = true; |
| |
| /* Block index */ |
| fs_reg surf_index; |
| nir_const_value *const_uniform_block = |
| nir_src_as_const_value(instr->src[1]); |
| if (const_uniform_block) { |
| unsigned index = stage_prog_data->binding_table.ssbo_start + |
| const_uniform_block->u32[0]; |
| surf_index = brw_imm_ud(index); |
| brw_mark_surface_used(prog_data, index); |
| } else { |
| surf_index = vgrf(glsl_type::uint_type); |
| bld.ADD(surf_index, get_nir_src(instr->src[1]), |
| brw_imm_ud(stage_prog_data->binding_table.ssbo_start)); |
| |
| brw_mark_surface_used(prog_data, |
| stage_prog_data->binding_table.ssbo_start + |
| nir->info.num_ssbos - 1); |
| } |
| |
| /* Value */ |
| fs_reg val_reg = get_nir_src(instr->src[0]); |
| |
| /* Writemask */ |
| unsigned writemask = instr->const_index[0]; |
| |
| /* get_nir_src() retypes to integer. Be wary of 64-bit types though |
| * since the untyped writes below operate in units of 32-bits, which |
| * means that we need to write twice as many components each time. |
| * Also, we have to suffle 64-bit data to be in the appropriate layout |
| * expected by our 32-bit write messages. |
| */ |
| unsigned type_size = 4; |
| unsigned bit_size = instr->src[0].is_ssa ? |
| instr->src[0].ssa->bit_size : instr->src[0].reg.reg->bit_size; |
| if (bit_size == 64) { |
| type_size = 8; |
| fs_reg tmp = |
| fs_reg(VGRF, alloc.allocate(alloc.sizes[val_reg.nr]), val_reg.type); |
| shuffle_64bit_data_for_32bit_write(bld, |
| retype(tmp, BRW_REGISTER_TYPE_F), |
| retype(val_reg, BRW_REGISTER_TYPE_DF), |
| instr->num_components); |
| val_reg = tmp; |
| } |
| |
| unsigned type_slots = type_size / 4; |
| |
| /* Combine groups of consecutive enabled channels in one write |
| * message. We use ffs to find the first enabled channel and then ffs on |
| * the bit-inverse, down-shifted writemask to determine the length of |
| * the block of enabled bits. |
| */ |
| while (writemask) { |
| unsigned first_component = ffs(writemask) - 1; |
| unsigned length = ffs(~(writemask >> first_component)) - 1; |
| |
| /* We can't write more than 2 64-bit components at once. Limit the |
| * length of the write to what we can do and let the next iteration |
| * handle the rest |
| */ |
| if (type_size > 4) |
| length = MIN2(2, length); |
| |
| fs_reg offset_reg; |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[2]); |
| if (const_offset) { |
| offset_reg = brw_imm_ud(const_offset->u32[0] + |
| type_size * first_component); |
| } else { |
| offset_reg = vgrf(glsl_type::uint_type); |
| bld.ADD(offset_reg, |
| retype(get_nir_src(instr->src[2]), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(type_size * first_component)); |
| } |
| |
| |
| emit_untyped_write(bld, surf_index, offset_reg, |
| offset(val_reg, bld, first_component * type_slots), |
| 1 /* dims */, length * type_slots, |
| BRW_PREDICATE_NONE); |
| |
| /* Clear the bits in the writemask that we just wrote, then try |
| * again to see if more channels are left. |
| */ |
| writemask &= (15 << (first_component + length)); |
| } |
| break; |
| } |
| |
| case nir_intrinsic_store_output: { |
| fs_reg src = get_nir_src(instr->src[0]); |
| fs_reg new_dest = offset(retype(nir_outputs, src.type), bld, |
| instr->const_index[0]); |
| |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[1]); |
| assert(const_offset && "Indirect output stores not allowed"); |
| new_dest = offset(new_dest, bld, const_offset->u32[0]); |
| |
| unsigned num_components = instr->num_components; |
| unsigned first_component = nir_intrinsic_component(instr); |
| unsigned bit_size = instr->src[0].is_ssa ? |
| instr->src[0].ssa->bit_size : instr->src[0].reg.reg->bit_size; |
| if (bit_size == 64) { |
| fs_reg tmp = |
| fs_reg(VGRF, alloc.allocate(2 * num_components), |
| BRW_REGISTER_TYPE_F); |
| shuffle_64bit_data_for_32bit_write( |
| bld, tmp, retype(src, BRW_REGISTER_TYPE_DF), num_components); |
| src = retype(tmp, src.type); |
| num_components *= 2; |
| } |
| |
| for (unsigned j = 0; j < num_components; j++) { |
| bld.MOV(offset(new_dest, bld, j + first_component), |
| offset(src, bld, j)); |
| } |
| break; |
| } |
| |
| case nir_intrinsic_ssbo_atomic_add: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_ADD, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_imin: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_IMIN, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_umin: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_UMIN, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_imax: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_IMAX, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_umax: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_UMAX, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_and: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_AND, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_or: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_OR, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_xor: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_XOR, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_exchange: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_MOV, instr); |
| break; |
| case nir_intrinsic_ssbo_atomic_comp_swap: |
| nir_emit_ssbo_atomic(bld, BRW_AOP_CMPWR, instr); |
| break; |
| |
| case nir_intrinsic_get_buffer_size: { |
| nir_const_value *const_uniform_block = nir_src_as_const_value(instr->src[0]); |
| unsigned ssbo_index = const_uniform_block ? const_uniform_block->u32[0] : 0; |
| |
| /* A resinfo's sampler message is used to get the buffer size. The |
| * SIMD8's writeback message consists of four registers and SIMD16's |
| * writeback message consists of 8 destination registers (two per each |
| * component). Because we are only interested on the first channel of |
| * the first returned component, where resinfo returns the buffer size |
| * for SURFTYPE_BUFFER, we can just use the SIMD8 variant regardless of |
| * the dispatch width. |
| */ |
| const fs_builder ubld = bld.exec_all().group(8, 0); |
| fs_reg src_payload = ubld.vgrf(BRW_REGISTER_TYPE_UD); |
| fs_reg ret_payload = ubld.vgrf(BRW_REGISTER_TYPE_UD, 4); |
| |
| /* Set LOD = 0 */ |
| ubld.MOV(src_payload, brw_imm_d(0)); |
| |
| const unsigned index = prog_data->binding_table.ssbo_start + ssbo_index; |
| fs_inst *inst = ubld.emit(FS_OPCODE_GET_BUFFER_SIZE, ret_payload, |
| src_payload, brw_imm_ud(index)); |
| inst->header_size = 0; |
| inst->mlen = 1; |
| inst->regs_written = 4; |
| |
| bld.MOV(retype(dest, ret_payload.type), component(ret_payload, 0)); |
| brw_mark_surface_used(prog_data, index); |
| break; |
| } |
| |
| case nir_intrinsic_load_channel_num: { |
| fs_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UW); |
| dest = retype(dest, BRW_REGISTER_TYPE_UD); |
| const fs_builder allbld8 = bld.group(8, 0).exec_all(); |
| allbld8.MOV(tmp, brw_imm_v(0x76543210)); |
| if (dispatch_width > 8) |
| allbld8.ADD(byte_offset(tmp, 16), tmp, brw_imm_uw(8u)); |
| if (dispatch_width > 16) { |
| const fs_builder allbld16 = bld.group(16, 0).exec_all(); |
| allbld16.ADD(byte_offset(tmp, 32), tmp, brw_imm_uw(16u)); |
| } |
| bld.MOV(dest, tmp); |
| break; |
| } |
| |
| default: |
| unreachable("unknown intrinsic"); |
| } |
| } |
| |
| void |
| fs_visitor::nir_emit_ssbo_atomic(const fs_builder &bld, |
| int op, nir_intrinsic_instr *instr) |
| { |
| if (stage == MESA_SHADER_FRAGMENT) |
| ((struct brw_wm_prog_data *)prog_data)->has_side_effects = true; |
| |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| fs_reg surface; |
| nir_const_value *const_surface = nir_src_as_const_value(instr->src[0]); |
| if (const_surface) { |
| unsigned surf_index = stage_prog_data->binding_table.ssbo_start + |
| const_surface->u32[0]; |
| surface = brw_imm_ud(surf_index); |
| brw_mark_surface_used(prog_data, surf_index); |
| } else { |
| surface = vgrf(glsl_type::uint_type); |
| bld.ADD(surface, get_nir_src(instr->src[0]), |
| brw_imm_ud(stage_prog_data->binding_table.ssbo_start)); |
| |
| /* Assume this may touch any SSBO. This is the same we do for other |
| * UBO/SSBO accesses with non-constant surface. |
| */ |
| brw_mark_surface_used(prog_data, |
| stage_prog_data->binding_table.ssbo_start + |
| nir->info.num_ssbos - 1); |
| } |
| |
| fs_reg offset = get_nir_src(instr->src[1]); |
| fs_reg data1 = get_nir_src(instr->src[2]); |
| fs_reg data2; |
| if (op == BRW_AOP_CMPWR) |
| data2 = get_nir_src(instr->src[3]); |
| |
| /* Emit the actual atomic operation */ |
| |
| fs_reg atomic_result = emit_untyped_atomic(bld, surface, offset, |
| data1, data2, |
| 1 /* dims */, 1 /* rsize */, |
| op, |
| BRW_PREDICATE_NONE); |
| dest.type = atomic_result.type; |
| bld.MOV(dest, atomic_result); |
| } |
| |
| void |
| fs_visitor::nir_emit_shared_atomic(const fs_builder &bld, |
| int op, nir_intrinsic_instr *instr) |
| { |
| fs_reg dest; |
| if (nir_intrinsic_infos[instr->intrinsic].has_dest) |
| dest = get_nir_dest(instr->dest); |
| |
| fs_reg surface = brw_imm_ud(GEN7_BTI_SLM); |
| fs_reg offset; |
| fs_reg data1 = get_nir_src(instr->src[1]); |
| fs_reg data2; |
| if (op == BRW_AOP_CMPWR) |
| data2 = get_nir_src(instr->src[2]); |
| |
| /* Get the offset */ |
| nir_const_value *const_offset = nir_src_as_const_value(instr->src[0]); |
| if (const_offset) { |
| offset = brw_imm_ud(instr->const_index[0] + const_offset->u32[0]); |
| } else { |
| offset = vgrf(glsl_type::uint_type); |
| bld.ADD(offset, |
| retype(get_nir_src(instr->src[0]), BRW_REGISTER_TYPE_UD), |
| brw_imm_ud(instr->const_index[0])); |
| } |
| |
| /* Emit the actual atomic operation operation */ |
| |
| fs_reg atomic_result = emit_untyped_atomic(bld, surface, offset, |
| data1, data2, |
| 1 /* dims */, 1 /* rsize */, |
| op, |
| BRW_PREDICATE_NONE); |
| dest.type = atomic_result.type; |
| bld.MOV(dest, atomic_result); |
| } |
| |
| void |
| fs_visitor::nir_emit_texture(const fs_builder &bld, nir_tex_instr *instr) |
| { |
| unsigned texture = instr->texture_index; |
| unsigned sampler = instr->sampler_index; |
| |
| fs_reg srcs[TEX_LOGICAL_NUM_SRCS]; |
| |
| srcs[TEX_LOGICAL_SRC_SURFACE] = brw_imm_ud(texture); |
| srcs[TEX_LOGICAL_SRC_SAMPLER] = brw_imm_ud(sampler); |
| |
| int lod_components = 0; |
| |
| /* The hardware requires a LOD for buffer textures */ |
| if (instr->sampler_dim == GLSL_SAMPLER_DIM_BUF) |
| srcs[TEX_LOGICAL_SRC_LOD] = brw_imm_d(0); |
| |
| for (unsigned i = 0; i < instr->num_srcs; i++) { |
| fs_reg src = get_nir_src(instr->src[i].src); |
| switch (instr->src[i].src_type) { |
| case nir_tex_src_bias: |
| srcs[TEX_LOGICAL_SRC_LOD] = |
| retype(get_nir_src_imm(instr->src[i].src), BRW_REGISTER_TYPE_F); |
| break; |
| case nir_tex_src_comparitor: |
| srcs[TEX_LOGICAL_SRC_SHADOW_C] = retype(src, BRW_REGISTER_TYPE_F); |
| break; |
| case nir_tex_src_coord: |
| switch (instr->op) { |
| case nir_texop_txf: |
| case nir_texop_txf_ms: |
| case nir_texop_txf_ms_mcs: |
| case nir_texop_samples_identical: |
| srcs[TEX_LOGICAL_SRC_COORDINATE] = retype(src, BRW_REGISTER_TYPE_D); |
| break; |
| default: |
| srcs[TEX_LOGICAL_SRC_COORDINATE] = retype(src, BRW_REGISTER_TYPE_F); |
| break; |
| } |
| break; |
| case nir_tex_src_ddx: |
| srcs[TEX_LOGICAL_SRC_LOD] = retype(src, BRW_REGISTER_TYPE_F); |
| lod_components = nir_tex_instr_src_size(instr, i); |
| break; |
| case nir_tex_src_ddy: |
| srcs[TEX_LOGICAL_SRC_LOD2] = retype(src, BRW_REGISTER_TYPE_F); |
| break; |
| case nir_tex_src_lod: |
| switch (instr->op) { |
| case nir_texop_txs: |
| srcs[TEX_LOGICAL_SRC_LOD] = |
| retype(get_nir_src_imm(instr->src[i].src), BRW_REGISTER_TYPE_UD); |
| break; |
| case nir_texop_txf: |
| srcs[TEX_LOGICAL_SRC_LOD] = |
| retype(get_nir_src_imm(instr->src[i].src), BRW_REGISTER_TYPE_D); |
| break; |
| default: |
| srcs[TEX_LOGICAL_SRC_LOD] = |
| retype(get_nir_src_imm(instr->src[i].src), BRW_REGISTER_TYPE_F); |
| break; |
| } |
| break; |
| case nir_tex_src_ms_index: |
| srcs[TEX_LOGICAL_SRC_SAMPLE_INDEX] = retype(src, BRW_REGISTER_TYPE_UD); |
| break; |
| |
| case nir_tex_src_offset: { |
| nir_const_value *const_offset = |
| nir_src_as_const_value(instr->src[i].src); |
| if (const_offset) { |
| unsigned header_bits = brw_texture_offset(const_offset->i32, 3); |
| if (header_bits != 0) |
| srcs[TEX_LOGICAL_SRC_OFFSET_VALUE] = brw_imm_ud(header_bits); |
| } else { |
| srcs[TEX_LOGICAL_SRC_OFFSET_VALUE] = |
| retype(src, BRW_REGISTER_TYPE_D); |
| } |
| break; |
| } |
| |
| case nir_tex_src_projector: |
| unreachable("should be lowered"); |
| |
| case nir_tex_src_texture_offset: { |
| /* Figure out the highest possible texture index and mark it as used */ |
| uint32_t max_used = texture + instr->texture_array_size - 1; |
| if (instr->op == nir_texop_tg4 && devinfo->gen < 8) { |
| max_used += stage_prog_data->binding_table.gather_texture_start; |
| } else { |
| max_used += stage_prog_data->binding_table.texture_start; |
| } |
| brw_mark_surface_used(prog_data, max_used); |
| |
| /* Emit code to evaluate the actual indexing expression */ |
| fs_reg tmp = vgrf(glsl_type::uint_type); |
| bld.ADD(tmp, src, brw_imm_ud(texture)); |
| srcs[TEX_LOGICAL_SRC_SURFACE] = bld.emit_uniformize(tmp); |
| break; |
| } |
| |
| case nir_tex_src_sampler_offset: { |
| /* Emit code to evaluate the actual indexing expression */ |
| fs_reg tmp = vgrf(glsl_type::uint_type); |
| bld.ADD(tmp, src, brw_imm_ud(sampler)); |
| srcs[TEX_LOGICAL_SRC_SAMPLER] = bld.emit_uniformize(tmp); |
| break; |
| } |
| |
| case nir_tex_src_ms_mcs: |
| assert(instr->op == nir_texop_txf_ms); |
| srcs[TEX_LOGICAL_SRC_MCS] = retype(src, BRW_REGISTER_TYPE_D); |
| break; |
| |
| case nir_tex_src_plane: { |
| nir_const_value *const_plane = |
| nir_src_as_const_value(instr->src[i].src); |
| const uint32_t plane = const_plane->u32[0]; |
| const uint32_t texture_index = |
| instr->texture_index + |
| stage_prog_data->binding_table.plane_start[plane] - |
| stage_prog_data->binding_table.texture_start; |
| |
| srcs[TEX_LOGICAL_SRC_SURFACE] = brw_imm_ud(texture_index); |
| break; |
| } |
| |
| default: |
| unreachable("unknown texture source"); |
| } |
| } |
| |
| if (srcs[TEX_LOGICAL_SRC_MCS].file == BAD_FILE && |
| (instr->op == nir_texop_txf_ms || |
| instr->op == nir_texop_samples_identical)) { |
| if (devinfo->gen >= 7 && |
| key_tex->compressed_multisample_layout_mask & (1 << texture)) { |
| srcs[TEX_LOGICAL_SRC_MCS] = |
| emit_mcs_fetch(srcs[TEX_LOGICAL_SRC_COORDINATE], |
| instr->coord_components, |
| srcs[TEX_LOGICAL_SRC_SURFACE]); |
| } else { |
| srcs[TEX_LOGICAL_SRC_MCS] = brw_imm_ud(0u); |
| } |
| } |
| |
| srcs[TEX_LOGICAL_SRC_COORD_COMPONENTS] = brw_imm_d(instr->coord_components); |
| srcs[TEX_LOGICAL_SRC_GRAD_COMPONENTS] = brw_imm_d(lod_components); |
| |
| if (instr->op == nir_texop_query_levels || |
| (instr->op == nir_texop_tex && stage != MESA_SHADER_FRAGMENT)) { |
| /* textureQueryLevels() and texture() are implemented in terms of TXS |
| * and TXL respectively, so we need to pass a valid LOD argument. |
| */ |
| assert(srcs[TEX_LOGICAL_SRC_LOD].file == BAD_FILE); |
| srcs[TEX_LOGICAL_SRC_LOD] = brw_imm_ud(0u); |
| } |
| |
| enum opcode opcode; |
| switch (instr->op) { |
| case nir_texop_tex: |
| opcode = (stage == MESA_SHADER_FRAGMENT ? SHADER_OPCODE_TEX_LOGICAL : |
| SHADER_OPCODE_TXL_LOGICAL); |
| break; |
| case nir_texop_txb: |
| opcode = FS_OPCODE_TXB_LOGICAL; |
| break; |
| case nir_texop_txl: |
| opcode = SHADER_OPCODE_TXL_LOGICAL; |
| break; |
| case nir_texop_txd: |
| opcode = SHADER_OPCODE_TXD_LOGICAL; |
| break; |
| case nir_texop_txf: |
| opcode = SHADER_OPCODE_TXF_LOGICAL; |
| break; |
| case nir_texop_txf_ms: |
| if ((key_tex->msaa_16 & (1 << sampler))) |
| opcode = SHADER_OPCODE_TXF_CMS_W_LOGICAL; |
| else |
| opcode = SHADER_OPCODE_TXF_CMS_LOGICAL; |
| break; |
| case nir_texop_txf_ms_mcs: |
| opcode = SHADER_OPCODE_TXF_MCS_LOGICAL; |
| break; |
| case nir_texop_query_levels: |
| case nir_texop_txs: |
| opcode = SHADER_OPCODE_TXS_LOGICAL; |
| break; |
| case nir_texop_lod: |
| opcode = SHADER_OPCODE_LOD_LOGICAL; |
| break; |
| case nir_texop_tg4: |
| if (srcs[TEX_LOGICAL_SRC_OFFSET_VALUE].file != BAD_FILE && |
| srcs[TEX_LOGICAL_SRC_OFFSET_VALUE].file != IMM) |
| opcode = SHADER_OPCODE_TG4_OFFSET_LOGICAL; |
| else |
| opcode = SHADER_OPCODE_TG4_LOGICAL; |
| break; |
| case nir_texop_texture_samples: |
| opcode = SHADER_OPCODE_SAMPLEINFO_LOGICAL; |
| break; |
| case nir_texop_samples_identical: { |
| fs_reg dst = retype(get_nir_dest(instr->dest), BRW_REGISTER_TYPE_D); |
| |
| /* If mcs is an immediate value, it means there is no MCS. In that case |
| * just return false. |
| */ |
| if (srcs[TEX_LOGICAL_SRC_MCS].file == BRW_IMMEDIATE_VALUE) { |
| bld.MOV(dst, brw_imm_ud(0u)); |
| } else if ((key_tex->msaa_16 & (1 << sampler))) { |
| fs_reg tmp = vgrf(glsl_type::uint_type); |
| bld.OR(tmp, srcs[TEX_LOGICAL_SRC_MCS], |
| offset(srcs[TEX_LOGICAL_SRC_MCS], bld, 1)); |
| bld.CMP(dst, tmp, brw_imm_ud(0u), BRW_CONDITIONAL_EQ); |
| } else { |
| bld.CMP(dst, srcs[TEX_LOGICAL_SRC_MCS], brw_imm_ud(0u), |
| BRW_CONDITIONAL_EQ); |
| } |
| return; |
| } |
| default: |
| unreachable("unknown texture opcode"); |
| } |
| |
| fs_reg dst = bld.vgrf(brw_type_for_nir_type(instr->dest_type), 4); |
| fs_inst *inst = bld.emit(opcode, dst, srcs, ARRAY_SIZE(srcs)); |
| |
| const unsigned dest_size = nir_tex_instr_dest_size(instr); |
| if (devinfo->gen >= 9 && |
| instr->op != nir_texop_tg4 && instr->op != nir_texop_query_levels) { |
| unsigned write_mask = instr->dest.is_ssa ? |
| nir_ssa_def_components_read(&instr->dest.ssa): |
| (1 << dest_size) - 1; |
| assert(write_mask != 0); /* dead code should have been eliminated */ |
| inst->regs_written = util_last_bit(write_mask) * dispatch_width / 8; |
| } else { |
| inst->regs_written = 4 * dispatch_width / 8; |
| } |
| |
| if (srcs[TEX_LOGICAL_SRC_SHADOW_C].file != BAD_FILE) |
| inst->shadow_compare = true; |
| |
| if (srcs[TEX_LOGICAL_SRC_OFFSET_VALUE].file == IMM) |
| inst->offset = srcs[TEX_LOGICAL_SRC_OFFSET_VALUE].ud; |
| |
| if (instr->op == nir_texop_tg4) { |
| if (instr->component == 1 && |
| key_tex->gather_channel_quirk_mask & (1 << texture)) { |
| /* gather4 sampler is broken for green channel on RG32F -- |
| * we must ask for blue instead. |
| */ |
| inst->offset |= 2 << 16; |
| } else { |
| inst->offset |= instr->component << 16; |
| } |
| |
| if (devinfo->gen == 6) |
| emit_gen6_gather_wa(key_tex->gen6_gather_wa[texture], dst); |
| } |
| |
| fs_reg nir_dest[4]; |
| for (unsigned i = 0; i < dest_size; i++) |
| nir_dest[i] = offset(dst, bld, i); |
| |
| if (instr->op == nir_texop_query_levels) { |
| /* # levels is in .w */ |
| nir_dest[0] = offset(dst, bld, 3); |
| } else if (instr->op == nir_texop_txs && |
| dest_size >= 3 && devinfo->gen < 7) { |
| /* Gen4-6 return 0 instead of 1 for single layer surfaces. */ |
| fs_reg depth = offset(dst, bld, 2); |
| nir_dest[2] = vgrf(glsl_type::int_type); |
| bld.emit_minmax(nir_dest[2], depth, brw_imm_d(1), BRW_CONDITIONAL_GE); |
| } |
| |
| bld.LOAD_PAYLOAD(get_nir_dest(instr->dest), nir_dest, dest_size, 0); |
| } |
| |
| void |
| fs_visitor::nir_emit_jump(const fs_builder &bld, nir_jump_instr *instr) |
| { |
| switch (instr->type) { |
| case nir_jump_break: |
| bld.emit(BRW_OPCODE_BREAK); |
| break; |
| case nir_jump_continue: |
| bld.emit(BRW_OPCODE_CONTINUE); |
| break; |
| case nir_jump_return: |
| default: |
| unreachable("unknown jump"); |
| } |
| } |
| |
| /** |
| * This helper takes the result of a load operation that reads 32-bit elements |
| * in this format: |
| * |
| * x x x x x x x x |
| * y y y y y y y y |
| * z z z z z z z z |
| * w w w w w w w w |
| * |
| * and shuffles the data to get this: |
| * |
| * x y x y x y x y |
| * x y x y x y x y |
| * z w z w z w z w |
| * z w z w z w z w |
| * |
| * Which is exactly what we want if the load is reading 64-bit components |
| * like doubles, where x represents the low 32-bit of the x double component |
| * and y represents the high 32-bit of the x double component (likewise with |
| * z and w for double component y). The parameter @components represents |
| * the number of 64-bit components present in @src. This would typically be |
| * 2 at most, since we can only fit 2 double elements in the result of a |
| * vec4 load. |
| * |
| * Notice that @dst and @src can be the same register. |
| */ |
| void |
| shuffle_32bit_load_result_to_64bit_data(const fs_builder &bld, |
| const fs_reg &dst, |
| const fs_reg &src, |
| uint32_t components) |
| { |
| assert(type_sz(src.type) == 4); |
| assert(type_sz(dst.type) == 8); |
| |
| /* A temporary that we will use to shuffle the 32-bit data of each |
| * component in the vector into valid 64-bit data. We can't write directly |
| * to dst because dst can be (and would usually be) the same as src |
| * and in that case the first MOV in the loop below would overwrite the |
| * data read in the second MOV. |
| */ |
| fs_reg tmp = bld.vgrf(dst.type); |
| |
| for (unsigned i = 0; i < components; i++) { |
| const fs_reg component_i = offset(src, bld, 2 * i); |
| |
| bld.MOV(subscript(tmp, src.type, 0), component_i); |
| bld.MOV(subscript(tmp, src.type, 1), offset(component_i, bld, 1)); |
| |
| bld.MOV(offset(dst, bld, i), tmp); |
| } |
| } |
| |
| /** |
| * This helper does the inverse operation of |
| * SHUFFLE_32BIT_LOAD_RESULT_TO_64BIT_DATA. |
| * |
| * We need to do this when we are going to use untyped write messsages that |
| * operate with 32-bit components in order to arrange our 64-bit data to be |
| * in the expected layout. |
| * |
| * Notice that callers of this function, unlike in the case of the inverse |
| * operation, would typically need to call this with dst and src being |
| * different registers, since they would otherwise corrupt the original |
| * 64-bit data they are about to write. Because of this the function checks |
| * that the src and dst regions involved in the operation do not overlap. |
| */ |
| void |
| shuffle_64bit_data_for_32bit_write(const fs_builder &bld, |
| const fs_reg &dst, |
| const fs_reg &src, |
| uint32_t components) |
| { |
| assert(type_sz(src.type) == 8); |
| assert(type_sz(dst.type) == 4); |
| |
| assert(!src.in_range(dst, 2 * components * bld.dispatch_width() / 8)); |
| |
| for (unsigned i = 0; i < components; i++) { |
| const fs_reg component_i = offset(src, bld, i); |
| bld.MOV(offset(dst, bld, 2 * i), subscript(component_i, dst.type, 0)); |
| bld.MOV(offset(dst, bld, 2 * i + 1), subscript(component_i, dst.type, 1)); |
| } |
| } |
| |
| fs_reg |
| setup_imm_df(const fs_builder &bld, double v) |
| { |
| const struct brw_device_info *devinfo = bld.shader->devinfo; |
| assert(devinfo->gen >= 7); |
| |
| if (devinfo->gen >= 8) |
| return brw_imm_df(v); |
| |
| /* gen7.5 does not support DF immediates straighforward but the DIM |
| * instruction allows to set the 64-bit immediate value. |
| */ |
| if (devinfo->is_haswell) { |
| const fs_builder ubld = bld.exec_all(); |
| fs_reg dst = ubld.vgrf(BRW_REGISTER_TYPE_DF, 1); |
| ubld.DIM(dst, brw_imm_df(v)); |
| return component(dst, 0); |
| } |
| |
| /* gen7 does not support DF immediates, so we generate a 64-bit constant by |
| * writing the low 32-bit of the constant to suboffset 0 of a VGRF and |
| * the high 32-bit to suboffset 4 and then applying a stride of 0. |
| * |
| * Alternatively, we could also produce a normal VGRF (without stride 0) |
| * by writing to all the channels in the VGRF, however, that would hit the |
| * gen7 bug where we have to split writes that span more than 1 register |
| * into instructions with a width of 4 (otherwise the write to the second |
| * register written runs into an execmask hardware bug) which isn't very |
| * nice. |
| */ |
| union { |
| double d; |
| struct { |
| uint32_t i1; |
| uint32_t i2; |
| }; |
| } di; |
| |
| di.d = v; |
| |
| const fs_builder ubld = bld.exec_all().group(1, 0); |
| const fs_reg tmp = ubld.vgrf(BRW_REGISTER_TYPE_UD, 2); |
| ubld.MOV(tmp, brw_imm_ud(di.i1)); |
| ubld.MOV(horiz_offset(tmp, 1), brw_imm_ud(di.i2)); |
| |
| return component(retype(tmp, BRW_REGISTER_TYPE_DF), 0); |
| } |