2 * Copyright © 2011 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
25 #include "glsl/ir_uniform.h"
27 #include "main/context.h"
28 #include "main/macros.h"
29 #include "program/prog_parameter.h"
30 #include "program/sampler.h"
35 vec4_instruction::vec4_instruction(vec4_visitor *v,
36 enum opcode opcode, dst_reg dst,
37 src_reg src0, src_reg src1, src_reg src2)
39 this->opcode = opcode;
44 this->ir = v->base_ir;
45 this->annotation = v->current_annotation;
49 vec4_visitor::emit(vec4_instruction *inst)
51 this->instructions.push_tail(inst);
57 vec4_visitor::emit_before(vec4_instruction *inst, vec4_instruction *new_inst)
59 new_inst->ir = inst->ir;
60 new_inst->annotation = inst->annotation;
62 inst->insert_before(new_inst);
68 vec4_visitor::emit(enum opcode opcode, dst_reg dst,
69 src_reg src0, src_reg src1, src_reg src2)
71 return emit(new(mem_ctx) vec4_instruction(this, opcode, dst,
77 vec4_visitor::emit(enum opcode opcode, dst_reg dst, src_reg src0, src_reg src1)
79 return emit(new(mem_ctx) vec4_instruction(this, opcode, dst, src0, src1));
83 vec4_visitor::emit(enum opcode opcode, dst_reg dst, src_reg src0)
85 return emit(new(mem_ctx) vec4_instruction(this, opcode, dst, src0));
89 vec4_visitor::emit(enum opcode opcode)
91 return emit(new(mem_ctx) vec4_instruction(this, opcode, dst_reg()));
96 vec4_visitor::op(dst_reg dst, src_reg src0) \
98 return new(mem_ctx) vec4_instruction(this, BRW_OPCODE_##op, dst, \
104 vec4_visitor::op(dst_reg dst, src_reg src0, src_reg src1) \
106 return new(mem_ctx) vec4_instruction(this, BRW_OPCODE_##op, dst, \
112 vec4_visitor::op(dst_reg dst, src_reg src0, src_reg src1, src_reg src2)\
114 return new(mem_ctx) vec4_instruction(this, BRW_OPCODE_##op, dst, \
147 /** Gen4 predicated IF. */
149 vec4_visitor::IF(uint32_t predicate)
151 vec4_instruction *inst;
153 inst = new(mem_ctx) vec4_instruction(this, BRW_OPCODE_IF);
154 inst->predicate = predicate;
159 /** Gen6+ IF with embedded comparison. */
161 vec4_visitor::IF(src_reg src0, src_reg src1, uint32_t condition)
163 assert(intel->gen >= 6);
165 vec4_instruction *inst;
167 resolve_ud_negate(&src0);
168 resolve_ud_negate(&src1);
170 inst = new(mem_ctx) vec4_instruction(this, BRW_OPCODE_IF, dst_null_d(),
172 inst->conditional_mod = condition;
178 * CMP: Sets the low bit of the destination channels with the result
179 * of the comparison, while the upper bits are undefined, and updates
180 * the flag register with the packed 16 bits of the result.
183 vec4_visitor::CMP(dst_reg dst, src_reg src0, src_reg src1, uint32_t condition)
185 vec4_instruction *inst;
187 /* original gen4 does type conversion to the destination type
188 * before before comparison, producing garbage results for floating
191 if (intel->gen == 4) {
192 dst.type = src0.type;
193 if (dst.file == HW_REG)
194 dst.fixed_hw_reg.type = dst.type;
197 resolve_ud_negate(&src0);
198 resolve_ud_negate(&src1);
200 inst = new(mem_ctx) vec4_instruction(this, BRW_OPCODE_CMP, dst, src0, src1);
201 inst->conditional_mod = condition;
207 vec4_visitor::SCRATCH_READ(dst_reg dst, src_reg index)
209 vec4_instruction *inst;
211 inst = new(mem_ctx) vec4_instruction(this, VS_OPCODE_SCRATCH_READ,
220 vec4_visitor::SCRATCH_WRITE(dst_reg dst, src_reg src, src_reg index)
222 vec4_instruction *inst;
224 inst = new(mem_ctx) vec4_instruction(this, VS_OPCODE_SCRATCH_WRITE,
233 vec4_visitor::emit_dp(dst_reg dst, src_reg src0, src_reg src1, unsigned elements)
235 static enum opcode dot_opcodes[] = {
236 BRW_OPCODE_DP2, BRW_OPCODE_DP3, BRW_OPCODE_DP4
239 emit(dot_opcodes[elements - 2], dst, src0, src1);
243 vec4_visitor::fix_3src_operand(src_reg src)
245 /* Using vec4 uniforms in SIMD4x2 programs is difficult. You'd like to be
246 * able to use vertical stride of zero to replicate the vec4 uniform, like
248 * g3<0;4,1>:f - [0, 4][1, 5][2, 6][3, 7]
250 * But you can't, since vertical stride is always four in three-source
251 * instructions. Instead, insert a MOV instruction to do the replication so
252 * that the three-source instruction can consume it.
255 /* The MOV is only needed if the source is a uniform or immediate. */
256 if (src.file != UNIFORM && src.file != IMM)
259 dst_reg expanded = dst_reg(this, glsl_type::vec4_type);
260 expanded.type = src.type;
261 emit(MOV(expanded, src));
262 return src_reg(expanded);
266 vec4_visitor::fix_math_operand(src_reg src)
268 /* The gen6 math instruction ignores the source modifiers --
269 * swizzle, abs, negate, and at least some parts of the register
270 * region description.
272 * Rather than trying to enumerate all these cases, *always* expand the
273 * operand to a temp GRF for gen6.
275 * For gen7, keep the operand as-is, except if immediate, which gen7 still
279 if (intel->gen == 7 && src.file != IMM)
282 dst_reg expanded = dst_reg(this, glsl_type::vec4_type);
283 expanded.type = src.type;
284 emit(MOV(expanded, src));
285 return src_reg(expanded);
289 vec4_visitor::emit_math1_gen6(enum opcode opcode, dst_reg dst, src_reg src)
291 src = fix_math_operand(src);
293 if (dst.writemask != WRITEMASK_XYZW) {
294 /* The gen6 math instruction must be align1, so we can't do
297 dst_reg temp_dst = dst_reg(this, glsl_type::vec4_type);
299 emit(opcode, temp_dst, src);
301 emit(MOV(dst, src_reg(temp_dst)));
303 emit(opcode, dst, src);
308 vec4_visitor::emit_math1_gen4(enum opcode opcode, dst_reg dst, src_reg src)
310 vec4_instruction *inst = emit(opcode, dst, src);
316 vec4_visitor::emit_math(opcode opcode, dst_reg dst, src_reg src)
319 case SHADER_OPCODE_RCP:
320 case SHADER_OPCODE_RSQ:
321 case SHADER_OPCODE_SQRT:
322 case SHADER_OPCODE_EXP2:
323 case SHADER_OPCODE_LOG2:
324 case SHADER_OPCODE_SIN:
325 case SHADER_OPCODE_COS:
328 assert(!"not reached: bad math opcode");
332 if (intel->gen >= 6) {
333 return emit_math1_gen6(opcode, dst, src);
335 return emit_math1_gen4(opcode, dst, src);
340 vec4_visitor::emit_math2_gen6(enum opcode opcode,
341 dst_reg dst, src_reg src0, src_reg src1)
343 src0 = fix_math_operand(src0);
344 src1 = fix_math_operand(src1);
346 if (dst.writemask != WRITEMASK_XYZW) {
347 /* The gen6 math instruction must be align1, so we can't do
350 dst_reg temp_dst = dst_reg(this, glsl_type::vec4_type);
351 temp_dst.type = dst.type;
353 emit(opcode, temp_dst, src0, src1);
355 emit(MOV(dst, src_reg(temp_dst)));
357 emit(opcode, dst, src0, src1);
362 vec4_visitor::emit_math2_gen4(enum opcode opcode,
363 dst_reg dst, src_reg src0, src_reg src1)
365 vec4_instruction *inst = emit(opcode, dst, src0, src1);
371 vec4_visitor::emit_math(enum opcode opcode,
372 dst_reg dst, src_reg src0, src_reg src1)
375 case SHADER_OPCODE_POW:
376 case SHADER_OPCODE_INT_QUOTIENT:
377 case SHADER_OPCODE_INT_REMAINDER:
380 assert(!"not reached: unsupported binary math opcode");
384 if (intel->gen >= 6) {
385 return emit_math2_gen6(opcode, dst, src0, src1);
387 return emit_math2_gen4(opcode, dst, src0, src1);
392 vec4_visitor::emit_pack_half_2x16(dst_reg dst, src_reg src0)
395 assert(!"ir_unop_pack_half_2x16 should be lowered");
397 assert(dst.type == BRW_REGISTER_TYPE_UD);
398 assert(src0.type == BRW_REGISTER_TYPE_F);
400 /* From the Ivybridge PRM, Vol4, Part3, Section 6.27 f32to16:
402 * Because this instruction does not have a 16-bit floating-point type,
403 * the destination data type must be Word (W).
405 * The destination must be DWord-aligned and specify a horizontal stride
406 * (HorzStride) of 2. The 16-bit result is stored in the lower word of
407 * each destination channel and the upper word is not modified.
409 * The above restriction implies that the f32to16 instruction must use
410 * align1 mode, because only in align1 mode is it possible to specify
411 * horizontal stride. We choose here to defy the hardware docs and emit
412 * align16 instructions.
414 * (I [chadv] did attempt to emit align1 instructions for VS f32to16
415 * instructions. I was partially successful in that the code passed all
416 * tests. However, the code was dubiously correct and fragile, and the
417 * tests were not harsh enough to probe that frailty. Not trusting the
418 * code, I chose instead to remain in align16 mode in defiance of the hw
421 * I've [chadv] experimentally confirmed that, on gen7 hardware and the
422 * simulator, emitting a f32to16 in align16 mode with UD as destination
423 * data type is safe. The behavior differs from that specified in the PRM
424 * in that the upper word of each destination channel is cleared to 0.
427 dst_reg tmp_dst(this, glsl_type::uvec2_type);
428 src_reg tmp_src(tmp_dst);
431 /* Verify the undocumented behavior on which the following instructions
432 * rely. If f32to16 fails to clear the upper word of the X and Y channels,
433 * then the result of the bit-or instruction below will be incorrect.
435 * You should inspect the disasm output in order to verify that the MOV is
436 * not optimized away.
438 emit(MOV(tmp_dst, src_reg(0x12345678u)));
441 /* Give tmp the form below, where "." means untouched.
444 * |.|.|0x0000hhhh|0x0000llll|.|.|0x0000hhhh|0x0000llll|
446 * That the upper word of each write-channel be 0 is required for the
447 * following bit-shift and bit-or instructions to work. Note that this
448 * relies on the undocumented hardware behavior mentioned above.
450 tmp_dst.writemask = WRITEMASK_XY;
451 emit(F32TO16(tmp_dst, src0));
453 /* Give the write-channels of dst the form:
456 tmp_src.swizzle = SWIZZLE_Y;
457 emit(SHL(dst, tmp_src, src_reg(16u)));
459 /* Finally, give the write-channels of dst the form of packHalf2x16's
463 tmp_src.swizzle = SWIZZLE_X;
464 emit(OR(dst, src_reg(dst), tmp_src));
468 vec4_visitor::emit_unpack_half_2x16(dst_reg dst, src_reg src0)
471 assert(!"ir_unop_unpack_half_2x16 should be lowered");
473 assert(dst.type == BRW_REGISTER_TYPE_F);
474 assert(src0.type == BRW_REGISTER_TYPE_UD);
476 /* From the Ivybridge PRM, Vol4, Part3, Section 6.26 f16to32:
478 * Because this instruction does not have a 16-bit floating-point type,
479 * the source data type must be Word (W). The destination type must be
482 * To use W as the source data type, we must adjust horizontal strides,
483 * which is only possible in align1 mode. All my [chadv] attempts at
484 * emitting align1 instructions for unpackHalf2x16 failed to pass the
485 * Piglit tests, so I gave up.
487 * I've verified that, on gen7 hardware and the simulator, it is safe to
488 * emit f16to32 in align16 mode with UD as source data type.
491 dst_reg tmp_dst(this, glsl_type::uvec2_type);
492 src_reg tmp_src(tmp_dst);
494 tmp_dst.writemask = WRITEMASK_X;
495 emit(AND(tmp_dst, src0, src_reg(0xffffu)));
497 tmp_dst.writemask = WRITEMASK_Y;
498 emit(SHR(tmp_dst, src0, src_reg(16u)));
500 dst.writemask = WRITEMASK_XY;
501 emit(F16TO32(dst, tmp_src));
505 vec4_visitor::visit_instructions(const exec_list *list)
507 foreach_list(node, list) {
508 ir_instruction *ir = (ir_instruction *)node;
517 type_size(const struct glsl_type *type)
522 switch (type->base_type) {
525 case GLSL_TYPE_FLOAT:
527 if (type->is_matrix()) {
528 return type->matrix_columns;
530 /* Regardless of size of vector, it gets a vec4. This is bad
531 * packing for things like floats, but otherwise arrays become a
532 * mess. Hopefully a later pass over the code can pack scalars
533 * down if appropriate.
537 case GLSL_TYPE_ARRAY:
538 assert(type->length > 0);
539 return type_size(type->fields.array) * type->length;
540 case GLSL_TYPE_STRUCT:
542 for (i = 0; i < type->length; i++) {
543 size += type_size(type->fields.structure[i].type);
546 case GLSL_TYPE_SAMPLER:
547 /* Samplers take up one slot in UNIFORMS[], but they're baked in
552 case GLSL_TYPE_ERROR:
553 case GLSL_TYPE_INTERFACE:
562 vec4_visitor::virtual_grf_alloc(int size)
564 if (virtual_grf_array_size <= virtual_grf_count) {
565 if (virtual_grf_array_size == 0)
566 virtual_grf_array_size = 16;
568 virtual_grf_array_size *= 2;
569 virtual_grf_sizes = reralloc(mem_ctx, virtual_grf_sizes, int,
570 virtual_grf_array_size);
571 virtual_grf_reg_map = reralloc(mem_ctx, virtual_grf_reg_map, int,
572 virtual_grf_array_size);
574 virtual_grf_reg_map[virtual_grf_count] = virtual_grf_reg_count;
575 virtual_grf_reg_count += size;
576 virtual_grf_sizes[virtual_grf_count] = size;
577 return virtual_grf_count++;
580 src_reg::src_reg(class vec4_visitor *v, const struct glsl_type *type)
585 this->reg = v->virtual_grf_alloc(type_size(type));
587 if (type->is_array() || type->is_record()) {
588 this->swizzle = BRW_SWIZZLE_NOOP;
590 this->swizzle = swizzle_for_size(type->vector_elements);
593 this->type = brw_type_for_base_type(type);
596 dst_reg::dst_reg(class vec4_visitor *v, const struct glsl_type *type)
601 this->reg = v->virtual_grf_alloc(type_size(type));
603 if (type->is_array() || type->is_record()) {
604 this->writemask = WRITEMASK_XYZW;
606 this->writemask = (1 << type->vector_elements) - 1;
609 this->type = brw_type_for_base_type(type);
612 /* Our support for uniforms is piggy-backed on the struct
613 * gl_fragment_program, because that's where the values actually
614 * get stored, rather than in some global gl_shader_program uniform
618 vec4_visitor::setup_uniform_values(ir_variable *ir)
620 int namelen = strlen(ir->name);
622 /* The data for our (non-builtin) uniforms is stored in a series of
623 * gl_uniform_driver_storage structs for each subcomponent that
624 * glGetUniformLocation() could name. We know it's been set up in the same
625 * order we'd walk the type, so walk the list of storage and find anything
626 * with our name, or the prefix of a component that starts with our name.
628 for (unsigned u = 0; u < shader_prog->NumUserUniformStorage; u++) {
629 struct gl_uniform_storage *storage = &shader_prog->UniformStorage[u];
631 if (strncmp(ir->name, storage->name, namelen) != 0 ||
632 (storage->name[namelen] != 0 &&
633 storage->name[namelen] != '.' &&
634 storage->name[namelen] != '[')) {
638 gl_constant_value *components = storage->storage;
639 unsigned vector_count = (MAX2(storage->array_elements, 1) *
640 storage->type->matrix_columns);
642 for (unsigned s = 0; s < vector_count; s++) {
643 uniform_vector_size[uniforms] = storage->type->vector_elements;
646 for (i = 0; i < uniform_vector_size[uniforms]; i++) {
647 prog_data->param[uniforms * 4 + i] = &components->f;
651 static float zero = 0;
652 prog_data->param[uniforms * 4 + i] = &zero;
661 vec4_visitor::setup_uniform_clipplane_values()
663 gl_clip_plane *clip_planes = brw_select_clip_planes(ctx);
665 if (intel->gen < 6) {
666 /* Pre-Gen6, we compact clip planes. For example, if the user
667 * enables just clip planes 0, 1, and 3, we will enable clip planes
668 * 0, 1, and 2 in the hardware, and we'll move clip plane 3 to clip
669 * plane 2. This simplifies the implementation of the Gen6 clip
672 int compacted_clipplane_index = 0;
673 for (int i = 0; i < MAX_CLIP_PLANES; ++i) {
674 if (!(key->userclip_planes_enabled_gen_4_5 & (1 << i)))
677 this->uniform_vector_size[this->uniforms] = 4;
678 this->userplane[compacted_clipplane_index] = dst_reg(UNIFORM, this->uniforms);
679 this->userplane[compacted_clipplane_index].type = BRW_REGISTER_TYPE_F;
680 for (int j = 0; j < 4; ++j) {
681 prog_data->param[this->uniforms * 4 + j] = &clip_planes[i][j];
683 ++compacted_clipplane_index;
687 /* In Gen6 and later, we don't compact clip planes, because this
688 * simplifies the implementation of gl_ClipDistance.
690 for (int i = 0; i < key->nr_userclip_plane_consts; ++i) {
691 this->uniform_vector_size[this->uniforms] = 4;
692 this->userplane[i] = dst_reg(UNIFORM, this->uniforms);
693 this->userplane[i].type = BRW_REGISTER_TYPE_F;
694 for (int j = 0; j < 4; ++j) {
695 prog_data->param[this->uniforms * 4 + j] = &clip_planes[i][j];
702 /* Our support for builtin uniforms is even scarier than non-builtin.
703 * It sits on top of the PROG_STATE_VAR parameters that are
704 * automatically updated from GL context state.
707 vec4_visitor::setup_builtin_uniform_values(ir_variable *ir)
709 const ir_state_slot *const slots = ir->state_slots;
710 assert(ir->state_slots != NULL);
712 for (unsigned int i = 0; i < ir->num_state_slots; i++) {
713 /* This state reference has already been setup by ir_to_mesa,
714 * but we'll get the same index back here. We can reference
715 * ParameterValues directly, since unlike brw_fs.cpp, we never
716 * add new state references during compile.
718 int index = _mesa_add_state_reference(this->prog->Parameters,
719 (gl_state_index *)slots[i].tokens);
720 float *values = &this->prog->Parameters->ParameterValues[index][0].f;
722 this->uniform_vector_size[this->uniforms] = 0;
723 /* Add each of the unique swizzled channels of the element.
724 * This will end up matching the size of the glsl_type of this field.
727 for (unsigned int j = 0; j < 4; j++) {
728 int swiz = GET_SWZ(slots[i].swizzle, j);
731 prog_data->param[this->uniforms * 4 + j] = &values[swiz];
732 if (swiz <= last_swiz)
733 this->uniform_vector_size[this->uniforms]++;
740 vec4_visitor::variable_storage(ir_variable *var)
742 return (dst_reg *)hash_table_find(this->variable_ht, var);
746 vec4_visitor::emit_bool_to_cond_code(ir_rvalue *ir, uint32_t *predicate)
748 ir_expression *expr = ir->as_expression();
750 *predicate = BRW_PREDICATE_NORMAL;
754 vec4_instruction *inst;
756 assert(expr->get_num_operands() <= 2);
757 for (unsigned int i = 0; i < expr->get_num_operands(); i++) {
758 expr->operands[i]->accept(this);
759 op[i] = this->result;
761 resolve_ud_negate(&op[i]);
764 switch (expr->operation) {
765 case ir_unop_logic_not:
766 inst = emit(AND(dst_null_d(), op[0], src_reg(1)));
767 inst->conditional_mod = BRW_CONDITIONAL_Z;
770 case ir_binop_logic_xor:
771 inst = emit(XOR(dst_null_d(), op[0], op[1]));
772 inst->conditional_mod = BRW_CONDITIONAL_NZ;
775 case ir_binop_logic_or:
776 inst = emit(OR(dst_null_d(), op[0], op[1]));
777 inst->conditional_mod = BRW_CONDITIONAL_NZ;
780 case ir_binop_logic_and:
781 inst = emit(AND(dst_null_d(), op[0], op[1]));
782 inst->conditional_mod = BRW_CONDITIONAL_NZ;
786 if (intel->gen >= 6) {
787 emit(CMP(dst_null_d(), op[0], src_reg(0.0f), BRW_CONDITIONAL_NZ));
789 inst = emit(MOV(dst_null_f(), op[0]));
790 inst->conditional_mod = BRW_CONDITIONAL_NZ;
795 if (intel->gen >= 6) {
796 emit(CMP(dst_null_d(), op[0], src_reg(0), BRW_CONDITIONAL_NZ));
798 inst = emit(MOV(dst_null_d(), op[0]));
799 inst->conditional_mod = BRW_CONDITIONAL_NZ;
803 case ir_binop_all_equal:
804 inst = emit(CMP(dst_null_d(), op[0], op[1], BRW_CONDITIONAL_Z));
805 *predicate = BRW_PREDICATE_ALIGN16_ALL4H;
808 case ir_binop_any_nequal:
809 inst = emit(CMP(dst_null_d(), op[0], op[1], BRW_CONDITIONAL_NZ));
810 *predicate = BRW_PREDICATE_ALIGN16_ANY4H;
814 inst = emit(CMP(dst_null_d(), op[0], src_reg(0), BRW_CONDITIONAL_NZ));
815 *predicate = BRW_PREDICATE_ALIGN16_ANY4H;
818 case ir_binop_greater:
819 case ir_binop_gequal:
821 case ir_binop_lequal:
823 case ir_binop_nequal:
824 emit(CMP(dst_null_d(), op[0], op[1],
825 brw_conditional_for_comparison(expr->operation)));
829 assert(!"not reached");
837 resolve_ud_negate(&this->result);
839 if (intel->gen >= 6) {
840 vec4_instruction *inst = emit(AND(dst_null_d(),
841 this->result, src_reg(1)));
842 inst->conditional_mod = BRW_CONDITIONAL_NZ;
844 vec4_instruction *inst = emit(MOV(dst_null_d(), this->result));
845 inst->conditional_mod = BRW_CONDITIONAL_NZ;
850 * Emit a gen6 IF statement with the comparison folded into the IF
854 vec4_visitor::emit_if_gen6(ir_if *ir)
856 ir_expression *expr = ir->condition->as_expression();
862 assert(expr->get_num_operands() <= 2);
863 for (unsigned int i = 0; i < expr->get_num_operands(); i++) {
864 expr->operands[i]->accept(this);
865 op[i] = this->result;
868 switch (expr->operation) {
869 case ir_unop_logic_not:
870 emit(IF(op[0], src_reg(0), BRW_CONDITIONAL_Z));
873 case ir_binop_logic_xor:
874 emit(IF(op[0], op[1], BRW_CONDITIONAL_NZ));
877 case ir_binop_logic_or:
878 temp = dst_reg(this, glsl_type::bool_type);
879 emit(OR(temp, op[0], op[1]));
880 emit(IF(src_reg(temp), src_reg(0), BRW_CONDITIONAL_NZ));
883 case ir_binop_logic_and:
884 temp = dst_reg(this, glsl_type::bool_type);
885 emit(AND(temp, op[0], op[1]));
886 emit(IF(src_reg(temp), src_reg(0), BRW_CONDITIONAL_NZ));
890 emit(IF(op[0], src_reg(0), BRW_CONDITIONAL_NZ));
894 emit(IF(op[0], src_reg(0), BRW_CONDITIONAL_NZ));
897 case ir_binop_greater:
898 case ir_binop_gequal:
900 case ir_binop_lequal:
902 case ir_binop_nequal:
903 emit(IF(op[0], op[1],
904 brw_conditional_for_comparison(expr->operation)));
907 case ir_binop_all_equal:
908 emit(CMP(dst_null_d(), op[0], op[1], BRW_CONDITIONAL_Z));
909 emit(IF(BRW_PREDICATE_ALIGN16_ALL4H));
912 case ir_binop_any_nequal:
913 emit(CMP(dst_null_d(), op[0], op[1], BRW_CONDITIONAL_NZ));
914 emit(IF(BRW_PREDICATE_ALIGN16_ANY4H));
918 emit(CMP(dst_null_d(), op[0], src_reg(0), BRW_CONDITIONAL_NZ));
919 emit(IF(BRW_PREDICATE_ALIGN16_ANY4H));
923 assert(!"not reached");
924 emit(IF(op[0], src_reg(0), BRW_CONDITIONAL_NZ));
930 ir->condition->accept(this);
932 emit(IF(this->result, src_reg(0), BRW_CONDITIONAL_NZ));
936 with_writemask(dst_reg const & r, int mask)
939 result.writemask = mask;
944 vec4_vs_visitor::emit_prolog()
946 dst_reg sign_recovery_shift;
947 dst_reg normalize_factor;
948 dst_reg es3_normalize_factor;
950 for (int i = 0; i < VERT_ATTRIB_MAX; i++) {
951 if (vs_prog_data->inputs_read & BITFIELD64_BIT(i)) {
952 uint8_t wa_flags = vs_compile->key.gl_attrib_wa_flags[i];
953 dst_reg reg(ATTR, i);
955 reg_d.type = BRW_REGISTER_TYPE_D;
956 dst_reg reg_ud = reg;
957 reg_ud.type = BRW_REGISTER_TYPE_UD;
959 /* Do GL_FIXED rescaling for GLES2.0. Our GL_FIXED attributes
960 * come in as floating point conversions of the integer values.
962 if (wa_flags & BRW_ATTRIB_WA_COMPONENT_MASK) {
964 dst.type = brw_type_for_base_type(glsl_type::vec4_type);
965 dst.writemask = (1 << (wa_flags & BRW_ATTRIB_WA_COMPONENT_MASK)) - 1;
966 emit(MUL(dst, src_reg(dst), src_reg(1.0f / 65536.0f)));
969 /* Do sign recovery for 2101010 formats if required. */
970 if (wa_flags & BRW_ATTRIB_WA_SIGN) {
971 if (sign_recovery_shift.file == BAD_FILE) {
972 /* shift constant: <22,22,22,30> */
973 sign_recovery_shift = dst_reg(this, glsl_type::uvec4_type);
974 emit(MOV(with_writemask(sign_recovery_shift, WRITEMASK_XYZ), src_reg(22u)));
975 emit(MOV(with_writemask(sign_recovery_shift, WRITEMASK_W), src_reg(30u)));
978 emit(SHL(reg_ud, src_reg(reg_ud), src_reg(sign_recovery_shift)));
979 emit(ASR(reg_d, src_reg(reg_d), src_reg(sign_recovery_shift)));
982 /* Apply BGRA swizzle if required. */
983 if (wa_flags & BRW_ATTRIB_WA_BGRA) {
984 src_reg temp = src_reg(reg);
985 temp.swizzle = BRW_SWIZZLE4(2,1,0,3);
986 emit(MOV(reg, temp));
989 if (wa_flags & BRW_ATTRIB_WA_NORMALIZE) {
990 /* ES 3.0 has different rules for converting signed normalized
991 * fixed-point numbers than desktop GL.
993 if (_mesa_is_gles3(ctx) && (wa_flags & BRW_ATTRIB_WA_SIGN)) {
994 /* According to equation 2.2 of the ES 3.0 specification,
995 * signed normalization conversion is done by:
997 * f = c / (2^(b-1)-1)
999 if (es3_normalize_factor.file == BAD_FILE) {
1000 /* mul constant: 1 / (2^(b-1) - 1) */
1001 es3_normalize_factor = dst_reg(this, glsl_type::vec4_type);
1002 emit(MOV(with_writemask(es3_normalize_factor, WRITEMASK_XYZ),
1003 src_reg(1.0f / ((1<<9) - 1))));
1004 emit(MOV(with_writemask(es3_normalize_factor, WRITEMASK_W),
1005 src_reg(1.0f / ((1<<1) - 1))));
1009 dst.type = brw_type_for_base_type(glsl_type::vec4_type);
1010 emit(MOV(dst, src_reg(reg_d)));
1011 emit(MUL(dst, src_reg(dst), src_reg(es3_normalize_factor)));
1012 emit_minmax(BRW_CONDITIONAL_G, dst, src_reg(dst), src_reg(-1.0f));
1014 /* The following equations are from the OpenGL 3.2 specification:
1016 * 2.1 unsigned normalization
1019 * 2.2 signed normalization
1020 * f = (2c+1)/(2^n-1)
1022 * Both of these share a common divisor, which is represented by
1023 * "normalize_factor" in the code below.
1025 if (normalize_factor.file == BAD_FILE) {
1026 /* 1 / (2^b - 1) for b=<10,10,10,2> */
1027 normalize_factor = dst_reg(this, glsl_type::vec4_type);
1028 emit(MOV(with_writemask(normalize_factor, WRITEMASK_XYZ),
1029 src_reg(1.0f / ((1<<10) - 1))));
1030 emit(MOV(with_writemask(normalize_factor, WRITEMASK_W),
1031 src_reg(1.0f / ((1<<2) - 1))));
1035 dst.type = brw_type_for_base_type(glsl_type::vec4_type);
1036 emit(MOV(dst, src_reg((wa_flags & BRW_ATTRIB_WA_SIGN) ? reg_d : reg_ud)));
1038 /* For signed normalization, we want the numerator to be 2c+1. */
1039 if (wa_flags & BRW_ATTRIB_WA_SIGN) {
1040 emit(MUL(dst, src_reg(dst), src_reg(2.0f)));
1041 emit(ADD(dst, src_reg(dst), src_reg(1.0f)));
1044 emit(MUL(dst, src_reg(dst), src_reg(normalize_factor)));
1048 if (wa_flags & BRW_ATTRIB_WA_SCALE) {
1050 dst.type = brw_type_for_base_type(glsl_type::vec4_type);
1051 emit(MOV(dst, src_reg((wa_flags & BRW_ATTRIB_WA_SIGN) ? reg_d : reg_ud)));
1059 vec4_vs_visitor::make_reg_for_system_value(ir_variable *ir)
1061 /* VertexID is stored by the VF as the last vertex element, but
1062 * we don't represent it with a flag in inputs_read, so we call
1063 * it VERT_ATTRIB_MAX, which setup_attributes() picks up on.
1065 dst_reg *reg = new(mem_ctx) dst_reg(ATTR, VERT_ATTRIB_MAX);
1066 vs_prog_data->uses_vertexid = true;
1068 switch (ir->location) {
1069 case SYSTEM_VALUE_VERTEX_ID:
1070 reg->writemask = WRITEMASK_X;
1072 case SYSTEM_VALUE_INSTANCE_ID:
1073 reg->writemask = WRITEMASK_Y;
1076 assert(!"not reached");
1085 vec4_visitor::visit(ir_variable *ir)
1087 dst_reg *reg = NULL;
1089 if (variable_storage(ir))
1093 case ir_var_shader_in:
1094 reg = new(mem_ctx) dst_reg(ATTR, ir->location);
1097 case ir_var_shader_out:
1098 reg = new(mem_ctx) dst_reg(this, ir->type);
1100 for (int i = 0; i < type_size(ir->type); i++) {
1101 output_reg[ir->location + i] = *reg;
1102 output_reg[ir->location + i].reg_offset = i;
1103 output_reg[ir->location + i].type =
1104 brw_type_for_base_type(ir->type->get_scalar_type());
1105 output_reg_annotation[ir->location + i] = ir->name;
1110 case ir_var_temporary:
1111 reg = new(mem_ctx) dst_reg(this, ir->type);
1114 case ir_var_uniform:
1115 reg = new(this->mem_ctx) dst_reg(UNIFORM, this->uniforms);
1117 /* Thanks to the lower_ubo_reference pass, we will see only
1118 * ir_binop_ubo_load expressions and not ir_dereference_variable for UBO
1119 * variables, so no need for them to be in variable_ht.
1121 if (ir->is_in_uniform_block())
1124 /* Track how big the whole uniform variable is, in case we need to put a
1125 * copy of its data into pull constants for array access.
1127 this->uniform_size[this->uniforms] = type_size(ir->type);
1129 if (!strncmp(ir->name, "gl_", 3)) {
1130 setup_builtin_uniform_values(ir);
1132 setup_uniform_values(ir);
1136 case ir_var_system_value:
1137 reg = make_reg_for_system_value(ir);
1141 assert(!"not reached");
1144 reg->type = brw_type_for_base_type(ir->type);
1145 hash_table_insert(this->variable_ht, reg, ir);
1149 vec4_visitor::visit(ir_loop *ir)
1153 /* We don't want debugging output to print the whole body of the
1154 * loop as the annotation.
1156 this->base_ir = NULL;
1158 if (ir->counter != NULL) {
1159 this->base_ir = ir->counter;
1160 ir->counter->accept(this);
1161 counter = *(variable_storage(ir->counter));
1163 if (ir->from != NULL) {
1164 this->base_ir = ir->from;
1165 ir->from->accept(this);
1167 emit(MOV(counter, this->result));
1171 emit(BRW_OPCODE_DO);
1174 this->base_ir = ir->to;
1175 ir->to->accept(this);
1177 emit(CMP(dst_null_d(), src_reg(counter), this->result,
1178 brw_conditional_for_comparison(ir->cmp)));
1180 vec4_instruction *inst = emit(BRW_OPCODE_BREAK);
1181 inst->predicate = BRW_PREDICATE_NORMAL;
1184 visit_instructions(&ir->body_instructions);
1187 if (ir->increment) {
1188 this->base_ir = ir->increment;
1189 ir->increment->accept(this);
1190 emit(ADD(counter, src_reg(counter), this->result));
1193 emit(BRW_OPCODE_WHILE);
1197 vec4_visitor::visit(ir_loop_jump *ir)
1200 case ir_loop_jump::jump_break:
1201 emit(BRW_OPCODE_BREAK);
1203 case ir_loop_jump::jump_continue:
1204 emit(BRW_OPCODE_CONTINUE);
1211 vec4_visitor::visit(ir_function_signature *ir)
1218 vec4_visitor::visit(ir_function *ir)
1220 /* Ignore function bodies other than main() -- we shouldn't see calls to
1221 * them since they should all be inlined.
1223 if (strcmp(ir->name, "main") == 0) {
1224 const ir_function_signature *sig;
1227 sig = ir->matching_signature(&empty);
1231 visit_instructions(&sig->body);
1236 vec4_visitor::try_emit_sat(ir_expression *ir)
1238 ir_rvalue *sat_src = ir->as_rvalue_to_saturate();
1242 sat_src->accept(this);
1243 src_reg src = this->result;
1245 this->result = src_reg(this, ir->type);
1246 vec4_instruction *inst;
1247 inst = emit(MOV(dst_reg(this->result), src));
1248 inst->saturate = true;
1254 vec4_visitor::try_emit_mad(ir_expression *ir, int mul_arg)
1256 /* 3-src instructions were introduced in gen6. */
1260 /* MAD can only handle floating-point data. */
1261 if (ir->type->base_type != GLSL_TYPE_FLOAT)
1264 ir_rvalue *nonmul = ir->operands[1 - mul_arg];
1265 ir_expression *mul = ir->operands[mul_arg]->as_expression();
1267 if (!mul || mul->operation != ir_binop_mul)
1270 nonmul->accept(this);
1271 src_reg src0 = fix_3src_operand(this->result);
1273 mul->operands[0]->accept(this);
1274 src_reg src1 = fix_3src_operand(this->result);
1276 mul->operands[1]->accept(this);
1277 src_reg src2 = fix_3src_operand(this->result);
1279 this->result = src_reg(this, ir->type);
1280 emit(BRW_OPCODE_MAD, dst_reg(this->result), src0, src1, src2);
1286 vec4_visitor::emit_bool_comparison(unsigned int op,
1287 dst_reg dst, src_reg src0, src_reg src1)
1289 /* original gen4 does destination conversion before comparison. */
1291 dst.type = src0.type;
1293 emit(CMP(dst, src0, src1, brw_conditional_for_comparison(op)));
1295 dst.type = BRW_REGISTER_TYPE_D;
1296 emit(AND(dst, src_reg(dst), src_reg(0x1)));
1300 vec4_visitor::emit_minmax(uint32_t conditionalmod, dst_reg dst,
1301 src_reg src0, src_reg src1)
1303 vec4_instruction *inst;
1305 if (intel->gen >= 6) {
1306 inst = emit(BRW_OPCODE_SEL, dst, src0, src1);
1307 inst->conditional_mod = conditionalmod;
1309 emit(CMP(dst, src0, src1, conditionalmod));
1311 inst = emit(BRW_OPCODE_SEL, dst, src0, src1);
1312 inst->predicate = BRW_PREDICATE_NORMAL;
1317 is_16bit_constant(ir_rvalue *rvalue)
1319 ir_constant *constant = rvalue->as_constant();
1323 if (constant->type != glsl_type::int_type &&
1324 constant->type != glsl_type::uint_type)
1327 return constant->value.u[0] < (1 << 16);
1331 vec4_visitor::visit(ir_expression *ir)
1333 unsigned int operand;
1334 src_reg op[Elements(ir->operands)];
1337 vec4_instruction *inst;
1339 if (try_emit_sat(ir))
1342 if (ir->operation == ir_binop_add) {
1343 if (try_emit_mad(ir, 0) || try_emit_mad(ir, 1))
1347 for (operand = 0; operand < ir->get_num_operands(); operand++) {
1348 this->result.file = BAD_FILE;
1349 ir->operands[operand]->accept(this);
1350 if (this->result.file == BAD_FILE) {
1351 printf("Failed to get tree for expression operand:\n");
1352 ir->operands[operand]->print();
1355 op[operand] = this->result;
1357 /* Matrix expression operands should have been broken down to vector
1358 * operations already.
1360 assert(!ir->operands[operand]->type->is_matrix());
1363 int vector_elements = ir->operands[0]->type->vector_elements;
1364 if (ir->operands[1]) {
1365 vector_elements = MAX2(vector_elements,
1366 ir->operands[1]->type->vector_elements);
1369 this->result.file = BAD_FILE;
1371 /* Storage for our result. Ideally for an assignment we'd be using
1372 * the actual storage for the result here, instead.
1374 result_src = src_reg(this, ir->type);
1375 /* convenience for the emit functions below. */
1376 result_dst = dst_reg(result_src);
1377 /* If nothing special happens, this is the result. */
1378 this->result = result_src;
1379 /* Limit writes to the channels that will be used by result_src later.
1380 * This does limit this temp's use as a temporary for multi-instruction
1383 result_dst.writemask = (1 << ir->type->vector_elements) - 1;
1385 switch (ir->operation) {
1386 case ir_unop_logic_not:
1387 /* Note that BRW_OPCODE_NOT is not appropriate here, since it is
1388 * ones complement of the whole register, not just bit 0.
1390 emit(XOR(result_dst, op[0], src_reg(1)));
1393 op[0].negate = !op[0].negate;
1394 this->result = op[0];
1398 op[0].negate = false;
1399 this->result = op[0];
1403 emit(MOV(result_dst, src_reg(0.0f)));
1405 emit(CMP(dst_null_d(), op[0], src_reg(0.0f), BRW_CONDITIONAL_G));
1406 inst = emit(MOV(result_dst, src_reg(1.0f)));
1407 inst->predicate = BRW_PREDICATE_NORMAL;
1409 emit(CMP(dst_null_d(), op[0], src_reg(0.0f), BRW_CONDITIONAL_L));
1410 inst = emit(MOV(result_dst, src_reg(-1.0f)));
1411 inst->predicate = BRW_PREDICATE_NORMAL;
1416 emit_math(SHADER_OPCODE_RCP, result_dst, op[0]);
1420 emit_math(SHADER_OPCODE_EXP2, result_dst, op[0]);
1423 emit_math(SHADER_OPCODE_LOG2, result_dst, op[0]);
1427 assert(!"not reached: should be handled by ir_explog_to_explog2");
1430 case ir_unop_sin_reduced:
1431 emit_math(SHADER_OPCODE_SIN, result_dst, op[0]);
1434 case ir_unop_cos_reduced:
1435 emit_math(SHADER_OPCODE_COS, result_dst, op[0]);
1440 assert(!"derivatives not valid in vertex shader");
1443 case ir_unop_bitfield_reverse:
1444 emit(BFREV(result_dst, op[0]));
1446 case ir_unop_bit_count:
1447 emit(CBIT(result_dst, op[0]));
1449 case ir_unop_find_msb: {
1450 src_reg temp = src_reg(this, glsl_type::uint_type);
1452 inst = emit(FBH(dst_reg(temp), op[0]));
1453 inst->dst.writemask = WRITEMASK_XYZW;
1455 /* FBH counts from the MSB side, while GLSL's findMSB() wants the count
1456 * from the LSB side. If FBH didn't return an error (0xFFFFFFFF), then
1457 * subtract the result from 31 to convert the MSB count into an LSB count.
1460 /* FBH only supports UD type for dst, so use a MOV to convert UD to D. */
1461 temp.swizzle = BRW_SWIZZLE_NOOP;
1462 emit(MOV(result_dst, temp));
1464 src_reg src_tmp = src_reg(result_dst);
1465 emit(CMP(dst_null_d(), src_tmp, src_reg(-1), BRW_CONDITIONAL_NZ));
1467 src_tmp.negate = true;
1468 inst = emit(ADD(result_dst, src_tmp, src_reg(31)));
1469 inst->predicate = BRW_PREDICATE_NORMAL;
1472 case ir_unop_find_lsb:
1473 emit(FBL(result_dst, op[0]));
1477 assert(!"not reached: should be handled by lower_noise");
1481 emit(ADD(result_dst, op[0], op[1]));
1484 assert(!"not reached: should be handled by ir_sub_to_add_neg");
1488 if (ir->type->is_integer()) {
1489 /* For integer multiplication, the MUL uses the low 16 bits of one of
1490 * the operands (src0 through SNB, src1 on IVB and later). The MACH
1491 * accumulates in the contribution of the upper 16 bits of that
1492 * operand. If we can determine that one of the args is in the low
1493 * 16 bits, though, we can just emit a single MUL.
1495 if (is_16bit_constant(ir->operands[0])) {
1497 emit(MUL(result_dst, op[0], op[1]));
1499 emit(MUL(result_dst, op[1], op[0]));
1500 } else if (is_16bit_constant(ir->operands[1])) {
1502 emit(MUL(result_dst, op[1], op[0]));
1504 emit(MUL(result_dst, op[0], op[1]));
1506 struct brw_reg acc = retype(brw_acc_reg(), BRW_REGISTER_TYPE_D);
1508 emit(MUL(acc, op[0], op[1]));
1509 emit(MACH(dst_null_d(), op[0], op[1]));
1510 emit(MOV(result_dst, src_reg(acc)));
1513 emit(MUL(result_dst, op[0], op[1]));
1517 /* Floating point should be lowered by DIV_TO_MUL_RCP in the compiler. */
1518 assert(ir->type->is_integer());
1519 emit_math(SHADER_OPCODE_INT_QUOTIENT, result_dst, op[0], op[1]);
1522 /* Floating point should be lowered by MOD_TO_FRACT in the compiler. */
1523 assert(ir->type->is_integer());
1524 emit_math(SHADER_OPCODE_INT_REMAINDER, result_dst, op[0], op[1]);
1528 case ir_binop_greater:
1529 case ir_binop_lequal:
1530 case ir_binop_gequal:
1531 case ir_binop_equal:
1532 case ir_binop_nequal: {
1533 emit(CMP(result_dst, op[0], op[1],
1534 brw_conditional_for_comparison(ir->operation)));
1535 emit(AND(result_dst, result_src, src_reg(0x1)));
1539 case ir_binop_all_equal:
1540 /* "==" operator producing a scalar boolean. */
1541 if (ir->operands[0]->type->is_vector() ||
1542 ir->operands[1]->type->is_vector()) {
1543 emit(CMP(dst_null_d(), op[0], op[1], BRW_CONDITIONAL_Z));
1544 emit(MOV(result_dst, src_reg(0)));
1545 inst = emit(MOV(result_dst, src_reg(1)));
1546 inst->predicate = BRW_PREDICATE_ALIGN16_ALL4H;
1548 emit(CMP(result_dst, op[0], op[1], BRW_CONDITIONAL_Z));
1549 emit(AND(result_dst, result_src, src_reg(0x1)));
1552 case ir_binop_any_nequal:
1553 /* "!=" operator producing a scalar boolean. */
1554 if (ir->operands[0]->type->is_vector() ||
1555 ir->operands[1]->type->is_vector()) {
1556 emit(CMP(dst_null_d(), op[0], op[1], BRW_CONDITIONAL_NZ));
1558 emit(MOV(result_dst, src_reg(0)));
1559 inst = emit(MOV(result_dst, src_reg(1)));
1560 inst->predicate = BRW_PREDICATE_ALIGN16_ANY4H;
1562 emit(CMP(result_dst, op[0], op[1], BRW_CONDITIONAL_NZ));
1563 emit(AND(result_dst, result_src, src_reg(0x1)));
1568 emit(CMP(dst_null_d(), op[0], src_reg(0), BRW_CONDITIONAL_NZ));
1569 emit(MOV(result_dst, src_reg(0)));
1571 inst = emit(MOV(result_dst, src_reg(1)));
1572 inst->predicate = BRW_PREDICATE_ALIGN16_ANY4H;
1575 case ir_binop_logic_xor:
1576 emit(XOR(result_dst, op[0], op[1]));
1579 case ir_binop_logic_or:
1580 emit(OR(result_dst, op[0], op[1]));
1583 case ir_binop_logic_and:
1584 emit(AND(result_dst, op[0], op[1]));
1588 assert(ir->operands[0]->type->is_vector());
1589 assert(ir->operands[0]->type == ir->operands[1]->type);
1590 emit_dp(result_dst, op[0], op[1], ir->operands[0]->type->vector_elements);
1594 emit_math(SHADER_OPCODE_SQRT, result_dst, op[0]);
1597 emit_math(SHADER_OPCODE_RSQ, result_dst, op[0]);
1600 case ir_unop_bitcast_i2f:
1601 case ir_unop_bitcast_u2f:
1602 this->result = op[0];
1603 this->result.type = BRW_REGISTER_TYPE_F;
1606 case ir_unop_bitcast_f2i:
1607 this->result = op[0];
1608 this->result.type = BRW_REGISTER_TYPE_D;
1611 case ir_unop_bitcast_f2u:
1612 this->result = op[0];
1613 this->result.type = BRW_REGISTER_TYPE_UD;
1624 emit(MOV(result_dst, op[0]));
1628 emit(CMP(result_dst, op[0], src_reg(0.0f), BRW_CONDITIONAL_NZ));
1629 emit(AND(result_dst, result_src, src_reg(1)));
1634 emit(RNDZ(result_dst, op[0]));
1637 op[0].negate = !op[0].negate;
1638 inst = emit(RNDD(result_dst, op[0]));
1639 this->result.negate = true;
1642 inst = emit(RNDD(result_dst, op[0]));
1645 inst = emit(FRC(result_dst, op[0]));
1647 case ir_unop_round_even:
1648 emit(RNDE(result_dst, op[0]));
1652 emit_minmax(BRW_CONDITIONAL_L, result_dst, op[0], op[1]);
1655 emit_minmax(BRW_CONDITIONAL_G, result_dst, op[0], op[1]);
1659 emit_math(SHADER_OPCODE_POW, result_dst, op[0], op[1]);
1662 case ir_unop_bit_not:
1663 inst = emit(NOT(result_dst, op[0]));
1665 case ir_binop_bit_and:
1666 inst = emit(AND(result_dst, op[0], op[1]));
1668 case ir_binop_bit_xor:
1669 inst = emit(XOR(result_dst, op[0], op[1]));
1671 case ir_binop_bit_or:
1672 inst = emit(OR(result_dst, op[0], op[1]));
1675 case ir_binop_lshift:
1676 inst = emit(SHL(result_dst, op[0], op[1]));
1679 case ir_binop_rshift:
1680 if (ir->type->base_type == GLSL_TYPE_INT)
1681 inst = emit(ASR(result_dst, op[0], op[1]));
1683 inst = emit(SHR(result_dst, op[0], op[1]));
1687 emit(BFI1(result_dst, op[0], op[1]));
1690 case ir_binop_ubo_load: {
1691 ir_constant *uniform_block = ir->operands[0]->as_constant();
1692 ir_constant *const_offset_ir = ir->operands[1]->as_constant();
1693 unsigned const_offset = const_offset_ir ? const_offset_ir->value.u[0] : 0;
1694 src_reg offset = op[1];
1696 /* Now, load the vector from that offset. */
1697 assert(ir->type->is_vector() || ir->type->is_scalar());
1699 src_reg packed_consts = src_reg(this, glsl_type::vec4_type);
1700 packed_consts.type = result.type;
1701 src_reg surf_index =
1702 src_reg(SURF_INDEX_VS_UBO(uniform_block->value.u[0]));
1703 if (const_offset_ir) {
1704 offset = src_reg(const_offset / 16);
1706 emit(SHR(dst_reg(offset), offset, src_reg(4)));
1709 vec4_instruction *pull =
1710 emit(new(mem_ctx) vec4_instruction(this,
1711 VS_OPCODE_PULL_CONSTANT_LOAD,
1712 dst_reg(packed_consts),
1715 pull->base_mrf = 14;
1718 packed_consts.swizzle = swizzle_for_size(ir->type->vector_elements);
1719 packed_consts.swizzle += BRW_SWIZZLE4(const_offset % 16 / 4,
1720 const_offset % 16 / 4,
1721 const_offset % 16 / 4,
1722 const_offset % 16 / 4);
1724 /* UBO bools are any nonzero int. We store bools as either 0 or 1. */
1725 if (ir->type->base_type == GLSL_TYPE_BOOL) {
1726 emit(CMP(result_dst, packed_consts, src_reg(0u),
1727 BRW_CONDITIONAL_NZ));
1728 emit(AND(result_dst, result, src_reg(0x1)));
1730 emit(MOV(result_dst, packed_consts));
1735 case ir_binop_vector_extract:
1736 assert(!"should have been lowered by vec_index_to_cond_assign");
1740 op[0] = fix_3src_operand(op[0]);
1741 op[1] = fix_3src_operand(op[1]);
1742 op[2] = fix_3src_operand(op[2]);
1743 /* Note that the instruction's argument order is reversed from GLSL
1746 emit(LRP(result_dst, op[2], op[1], op[0]));
1750 op[0] = fix_3src_operand(op[0]);
1751 op[1] = fix_3src_operand(op[1]);
1752 op[2] = fix_3src_operand(op[2]);
1753 emit(BFI2(result_dst, op[0], op[1], op[2]));
1756 case ir_triop_bitfield_extract:
1757 op[0] = fix_3src_operand(op[0]);
1758 op[1] = fix_3src_operand(op[1]);
1759 op[2] = fix_3src_operand(op[2]);
1760 /* Note that the instruction's argument order is reversed from GLSL
1763 emit(BFE(result_dst, op[2], op[1], op[0]));
1766 case ir_triop_vector_insert:
1767 assert(!"should have been lowered by lower_vector_insert");
1770 case ir_quadop_bitfield_insert:
1771 assert(!"not reached: should be handled by "
1772 "bitfield_insert_to_bfm_bfi\n");
1775 case ir_quadop_vector:
1776 assert(!"not reached: should be handled by lower_quadop_vector");
1779 case ir_unop_pack_half_2x16:
1780 emit_pack_half_2x16(result_dst, op[0]);
1782 case ir_unop_unpack_half_2x16:
1783 emit_unpack_half_2x16(result_dst, op[0]);
1785 case ir_unop_pack_snorm_2x16:
1786 case ir_unop_pack_snorm_4x8:
1787 case ir_unop_pack_unorm_2x16:
1788 case ir_unop_pack_unorm_4x8:
1789 case ir_unop_unpack_snorm_2x16:
1790 case ir_unop_unpack_snorm_4x8:
1791 case ir_unop_unpack_unorm_2x16:
1792 case ir_unop_unpack_unorm_4x8:
1793 assert(!"not reached: should be handled by lower_packing_builtins");
1795 case ir_unop_unpack_half_2x16_split_x:
1796 case ir_unop_unpack_half_2x16_split_y:
1797 case ir_binop_pack_half_2x16_split:
1798 assert(!"not reached: should not occur in vertex shader");
1805 vec4_visitor::visit(ir_swizzle *ir)
1811 /* Note that this is only swizzles in expressions, not those on the left
1812 * hand side of an assignment, which do write masking. See ir_assignment
1816 ir->val->accept(this);
1818 assert(src.file != BAD_FILE);
1820 for (i = 0; i < ir->type->vector_elements; i++) {
1823 swizzle[i] = BRW_GET_SWZ(src.swizzle, ir->mask.x);
1826 swizzle[i] = BRW_GET_SWZ(src.swizzle, ir->mask.y);
1829 swizzle[i] = BRW_GET_SWZ(src.swizzle, ir->mask.z);
1832 swizzle[i] = BRW_GET_SWZ(src.swizzle, ir->mask.w);
1836 for (; i < 4; i++) {
1837 /* Replicate the last channel out. */
1838 swizzle[i] = swizzle[ir->type->vector_elements - 1];
1841 src.swizzle = BRW_SWIZZLE4(swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
1847 vec4_visitor::visit(ir_dereference_variable *ir)
1849 const struct glsl_type *type = ir->type;
1850 dst_reg *reg = variable_storage(ir->var);
1853 fail("Failed to find variable storage for %s\n", ir->var->name);
1854 this->result = src_reg(brw_null_reg());
1858 this->result = src_reg(*reg);
1860 /* System values get their swizzle from the dst_reg writemask */
1861 if (ir->var->mode == ir_var_system_value)
1864 if (type->is_scalar() || type->is_vector() || type->is_matrix())
1865 this->result.swizzle = swizzle_for_size(type->vector_elements);
1870 vec4_visitor::compute_array_stride(ir_dereference_array *ir)
1872 /* Under normal circumstances array elements are stored consecutively, so
1873 * the stride is equal to the size of the array element.
1875 return type_size(ir->type);
1880 vec4_visitor::visit(ir_dereference_array *ir)
1882 ir_constant *constant_index;
1884 int array_stride = compute_array_stride(ir);
1886 constant_index = ir->array_index->constant_expression_value();
1888 ir->array->accept(this);
1891 if (constant_index) {
1892 src.reg_offset += constant_index->value.i[0] * array_stride;
1894 /* Variable index array dereference. It eats the "vec4" of the
1895 * base of the array and an index that offsets the Mesa register
1898 ir->array_index->accept(this);
1902 if (array_stride == 1) {
1903 index_reg = this->result;
1905 index_reg = src_reg(this, glsl_type::int_type);
1907 emit(MUL(dst_reg(index_reg), this->result, src_reg(array_stride)));
1911 src_reg temp = src_reg(this, glsl_type::int_type);
1913 emit(ADD(dst_reg(temp), *src.reladdr, index_reg));
1918 src.reladdr = ralloc(mem_ctx, src_reg);
1919 memcpy(src.reladdr, &index_reg, sizeof(index_reg));
1922 /* If the type is smaller than a vec4, replicate the last channel out. */
1923 if (ir->type->is_scalar() || ir->type->is_vector() || ir->type->is_matrix())
1924 src.swizzle = swizzle_for_size(ir->type->vector_elements);
1926 src.swizzle = BRW_SWIZZLE_NOOP;
1927 src.type = brw_type_for_base_type(ir->type);
1933 vec4_visitor::visit(ir_dereference_record *ir)
1936 const glsl_type *struct_type = ir->record->type;
1939 ir->record->accept(this);
1941 for (i = 0; i < struct_type->length; i++) {
1942 if (strcmp(struct_type->fields.structure[i].name, ir->field) == 0)
1944 offset += type_size(struct_type->fields.structure[i].type);
1947 /* If the type is smaller than a vec4, replicate the last channel out. */
1948 if (ir->type->is_scalar() || ir->type->is_vector() || ir->type->is_matrix())
1949 this->result.swizzle = swizzle_for_size(ir->type->vector_elements);
1951 this->result.swizzle = BRW_SWIZZLE_NOOP;
1952 this->result.type = brw_type_for_base_type(ir->type);
1954 this->result.reg_offset += offset;
1958 * We want to be careful in assignment setup to hit the actual storage
1959 * instead of potentially using a temporary like we might with the
1960 * ir_dereference handler.
1963 get_assignment_lhs(ir_dereference *ir, vec4_visitor *v)
1965 /* The LHS must be a dereference. If the LHS is a variable indexed array
1966 * access of a vector, it must be separated into a series conditional moves
1967 * before reaching this point (see ir_vec_index_to_cond_assign).
1969 assert(ir->as_dereference());
1970 ir_dereference_array *deref_array = ir->as_dereference_array();
1972 assert(!deref_array->array->type->is_vector());
1975 /* Use the rvalue deref handler for the most part. We'll ignore
1976 * swizzles in it and write swizzles using writemask, though.
1979 return dst_reg(v->result);
1983 vec4_visitor::emit_block_move(dst_reg *dst, src_reg *src,
1984 const struct glsl_type *type, uint32_t predicate)
1986 if (type->base_type == GLSL_TYPE_STRUCT) {
1987 for (unsigned int i = 0; i < type->length; i++) {
1988 emit_block_move(dst, src, type->fields.structure[i].type, predicate);
1993 if (type->is_array()) {
1994 for (unsigned int i = 0; i < type->length; i++) {
1995 emit_block_move(dst, src, type->fields.array, predicate);
2000 if (type->is_matrix()) {
2001 const struct glsl_type *vec_type;
2003 vec_type = glsl_type::get_instance(GLSL_TYPE_FLOAT,
2004 type->vector_elements, 1);
2006 for (int i = 0; i < type->matrix_columns; i++) {
2007 emit_block_move(dst, src, vec_type, predicate);
2012 assert(type->is_scalar() || type->is_vector());
2014 dst->type = brw_type_for_base_type(type);
2015 src->type = dst->type;
2017 dst->writemask = (1 << type->vector_elements) - 1;
2019 src->swizzle = swizzle_for_size(type->vector_elements);
2021 vec4_instruction *inst = emit(MOV(*dst, *src));
2022 inst->predicate = predicate;
2029 /* If the RHS processing resulted in an instruction generating a
2030 * temporary value, and it would be easy to rewrite the instruction to
2031 * generate its result right into the LHS instead, do so. This ends
2032 * up reliably removing instructions where it can be tricky to do so
2033 * later without real UD chain information.
2036 vec4_visitor::try_rewrite_rhs_to_dst(ir_assignment *ir,
2039 vec4_instruction *pre_rhs_inst,
2040 vec4_instruction *last_rhs_inst)
2042 /* This could be supported, but it would take more smarts. */
2046 if (pre_rhs_inst == last_rhs_inst)
2047 return false; /* No instructions generated to work with. */
2049 /* Make sure the last instruction generated our source reg. */
2050 if (src.file != GRF ||
2051 src.file != last_rhs_inst->dst.file ||
2052 src.reg != last_rhs_inst->dst.reg ||
2053 src.reg_offset != last_rhs_inst->dst.reg_offset ||
2057 last_rhs_inst->predicate != BRW_PREDICATE_NONE)
2060 /* Check that that last instruction fully initialized the channels
2061 * we want to use, in the order we want to use them. We could
2062 * potentially reswizzle the operands of many instructions so that
2063 * we could handle out of order channels, but don't yet.
2066 for (unsigned i = 0; i < 4; i++) {
2067 if (dst.writemask & (1 << i)) {
2068 if (!(last_rhs_inst->dst.writemask & (1 << i)))
2071 if (BRW_GET_SWZ(src.swizzle, i) != i)
2076 /* Success! Rewrite the instruction. */
2077 last_rhs_inst->dst.file = dst.file;
2078 last_rhs_inst->dst.reg = dst.reg;
2079 last_rhs_inst->dst.reg_offset = dst.reg_offset;
2080 last_rhs_inst->dst.reladdr = dst.reladdr;
2081 last_rhs_inst->dst.writemask &= dst.writemask;
2087 vec4_visitor::visit(ir_assignment *ir)
2089 dst_reg dst = get_assignment_lhs(ir->lhs, this);
2090 uint32_t predicate = BRW_PREDICATE_NONE;
2092 if (!ir->lhs->type->is_scalar() &&
2093 !ir->lhs->type->is_vector()) {
2094 ir->rhs->accept(this);
2095 src_reg src = this->result;
2097 if (ir->condition) {
2098 emit_bool_to_cond_code(ir->condition, &predicate);
2101 /* emit_block_move doesn't account for swizzles in the source register.
2102 * This should be ok, since the source register is a structure or an
2103 * array, and those can't be swizzled. But double-check to be sure.
2105 assert(src.swizzle ==
2106 (ir->rhs->type->is_matrix()
2107 ? swizzle_for_size(ir->rhs->type->vector_elements)
2108 : BRW_SWIZZLE_NOOP));
2110 emit_block_move(&dst, &src, ir->rhs->type, predicate);
2114 /* Now we're down to just a scalar/vector with writemasks. */
2117 vec4_instruction *pre_rhs_inst, *last_rhs_inst;
2118 pre_rhs_inst = (vec4_instruction *)this->instructions.get_tail();
2120 ir->rhs->accept(this);
2122 last_rhs_inst = (vec4_instruction *)this->instructions.get_tail();
2124 src_reg src = this->result;
2127 int first_enabled_chan = 0;
2130 assert(ir->lhs->type->is_vector() ||
2131 ir->lhs->type->is_scalar());
2132 dst.writemask = ir->write_mask;
2134 for (int i = 0; i < 4; i++) {
2135 if (dst.writemask & (1 << i)) {
2136 first_enabled_chan = BRW_GET_SWZ(src.swizzle, i);
2141 /* Swizzle a small RHS vector into the channels being written.
2143 * glsl ir treats write_mask as dictating how many channels are
2144 * present on the RHS while in our instructions we need to make
2145 * those channels appear in the slots of the vec4 they're written to.
2147 for (int i = 0; i < 4; i++) {
2148 if (dst.writemask & (1 << i))
2149 swizzles[i] = BRW_GET_SWZ(src.swizzle, src_chan++);
2151 swizzles[i] = first_enabled_chan;
2153 src.swizzle = BRW_SWIZZLE4(swizzles[0], swizzles[1],
2154 swizzles[2], swizzles[3]);
2156 if (try_rewrite_rhs_to_dst(ir, dst, src, pre_rhs_inst, last_rhs_inst)) {
2160 if (ir->condition) {
2161 emit_bool_to_cond_code(ir->condition, &predicate);
2164 for (i = 0; i < type_size(ir->lhs->type); i++) {
2165 vec4_instruction *inst = emit(MOV(dst, src));
2166 inst->predicate = predicate;
2174 vec4_visitor::emit_constant_values(dst_reg *dst, ir_constant *ir)
2176 if (ir->type->base_type == GLSL_TYPE_STRUCT) {
2177 foreach_list(node, &ir->components) {
2178 ir_constant *field_value = (ir_constant *)node;
2180 emit_constant_values(dst, field_value);
2185 if (ir->type->is_array()) {
2186 for (unsigned int i = 0; i < ir->type->length; i++) {
2187 emit_constant_values(dst, ir->array_elements[i]);
2192 if (ir->type->is_matrix()) {
2193 for (int i = 0; i < ir->type->matrix_columns; i++) {
2194 float *vec = &ir->value.f[i * ir->type->vector_elements];
2196 for (int j = 0; j < ir->type->vector_elements; j++) {
2197 dst->writemask = 1 << j;
2198 dst->type = BRW_REGISTER_TYPE_F;
2200 emit(MOV(*dst, src_reg(vec[j])));
2207 int remaining_writemask = (1 << ir->type->vector_elements) - 1;
2209 for (int i = 0; i < ir->type->vector_elements; i++) {
2210 if (!(remaining_writemask & (1 << i)))
2213 dst->writemask = 1 << i;
2214 dst->type = brw_type_for_base_type(ir->type);
2216 /* Find other components that match the one we're about to
2217 * write. Emits fewer instructions for things like vec4(0.5,
2220 for (int j = i + 1; j < ir->type->vector_elements; j++) {
2221 if (ir->type->base_type == GLSL_TYPE_BOOL) {
2222 if (ir->value.b[i] == ir->value.b[j])
2223 dst->writemask |= (1 << j);
2225 /* u, i, and f storage all line up, so no need for a
2226 * switch case for comparing each type.
2228 if (ir->value.u[i] == ir->value.u[j])
2229 dst->writemask |= (1 << j);
2233 switch (ir->type->base_type) {
2234 case GLSL_TYPE_FLOAT:
2235 emit(MOV(*dst, src_reg(ir->value.f[i])));
2238 emit(MOV(*dst, src_reg(ir->value.i[i])));
2240 case GLSL_TYPE_UINT:
2241 emit(MOV(*dst, src_reg(ir->value.u[i])));
2243 case GLSL_TYPE_BOOL:
2244 emit(MOV(*dst, src_reg(ir->value.b[i])));
2247 assert(!"Non-float/uint/int/bool constant");
2251 remaining_writemask &= ~dst->writemask;
2257 vec4_visitor::visit(ir_constant *ir)
2259 dst_reg dst = dst_reg(this, ir->type);
2260 this->result = src_reg(dst);
2262 emit_constant_values(&dst, ir);
2266 vec4_visitor::visit(ir_call *ir)
2268 assert(!"not reached");
2272 vec4_visitor::visit(ir_texture *ir)
2275 _mesa_get_sampler_uniform_value(ir->sampler, shader_prog, prog);
2277 /* Should be lowered by do_lower_texture_projection */
2278 assert(!ir->projector);
2280 /* Generate code to compute all the subexpression trees. This has to be
2281 * done before loading any values into MRFs for the sampler message since
2282 * generating these values may involve SEND messages that need the MRFs.
2285 if (ir->coordinate) {
2286 ir->coordinate->accept(this);
2287 coordinate = this->result;
2290 src_reg shadow_comparitor;
2291 if (ir->shadow_comparitor) {
2292 ir->shadow_comparitor->accept(this);
2293 shadow_comparitor = this->result;
2296 const glsl_type *lod_type = NULL, *sample_index_type = NULL;
2297 src_reg lod, dPdx, dPdy, sample_index;
2300 lod = src_reg(0.0f);
2301 lod_type = glsl_type::float_type;
2306 ir->lod_info.lod->accept(this);
2308 lod_type = ir->lod_info.lod->type;
2311 ir->lod_info.sample_index->accept(this);
2312 sample_index = this->result;
2313 sample_index_type = ir->lod_info.sample_index->type;
2316 ir->lod_info.grad.dPdx->accept(this);
2317 dPdx = this->result;
2319 ir->lod_info.grad.dPdy->accept(this);
2320 dPdy = this->result;
2322 lod_type = ir->lod_info.grad.dPdx->type;
2329 vec4_instruction *inst = NULL;
2333 inst = new(mem_ctx) vec4_instruction(this, SHADER_OPCODE_TXL);
2336 inst = new(mem_ctx) vec4_instruction(this, SHADER_OPCODE_TXD);
2339 inst = new(mem_ctx) vec4_instruction(this, SHADER_OPCODE_TXF);
2342 inst = new(mem_ctx) vec4_instruction(this, SHADER_OPCODE_TXF_MS);
2345 inst = new(mem_ctx) vec4_instruction(this, SHADER_OPCODE_TXS);
2348 assert(!"TXB is not valid for vertex shaders.");
2351 assert(!"LOD is not valid for vertex shaders.");
2355 bool use_texture_offset = ir->offset != NULL && ir->op != ir_txf;
2357 /* Texel offsets go in the message header; Gen4 also requires headers. */
2358 inst->header_present = use_texture_offset || intel->gen < 5;
2360 inst->mlen = inst->header_present + 1; /* always at least one */
2361 inst->sampler = sampler;
2362 inst->dst = dst_reg(this, ir->type);
2363 inst->dst.writemask = WRITEMASK_XYZW;
2364 inst->shadow_compare = ir->shadow_comparitor != NULL;
2366 if (use_texture_offset)
2367 inst->texture_offset = brw_texture_offset(ir->offset->as_constant());
2369 /* MRF for the first parameter */
2370 int param_base = inst->base_mrf + inst->header_present;
2372 if (ir->op == ir_txs) {
2373 int writemask = intel->gen == 4 ? WRITEMASK_W : WRITEMASK_X;
2374 emit(MOV(dst_reg(MRF, param_base, lod_type, writemask), lod));
2376 int i, coord_mask = 0, zero_mask = 0;
2377 /* Load the coordinate */
2378 /* FINISHME: gl_clamp_mask and saturate */
2379 for (i = 0; i < ir->coordinate->type->vector_elements; i++)
2380 coord_mask |= (1 << i);
2382 zero_mask |= (1 << i);
2384 if (ir->offset && ir->op == ir_txf) {
2385 /* It appears that the ld instruction used for txf does its
2386 * address bounds check before adding in the offset. To work
2387 * around this, just add the integer offset to the integer
2388 * texel coordinate, and don't put the offset in the header.
2390 ir_constant *offset = ir->offset->as_constant();
2393 for (int j = 0; j < ir->coordinate->type->vector_elements; j++) {
2394 src_reg src = coordinate;
2395 src.swizzle = BRW_SWIZZLE4(BRW_GET_SWZ(src.swizzle, j),
2396 BRW_GET_SWZ(src.swizzle, j),
2397 BRW_GET_SWZ(src.swizzle, j),
2398 BRW_GET_SWZ(src.swizzle, j));
2399 emit(ADD(dst_reg(MRF, param_base, ir->coordinate->type, 1 << j),
2400 src, offset->value.i[j]));
2403 emit(MOV(dst_reg(MRF, param_base, ir->coordinate->type, coord_mask),
2406 emit(MOV(dst_reg(MRF, param_base, ir->coordinate->type, zero_mask),
2408 /* Load the shadow comparitor */
2409 if (ir->shadow_comparitor && ir->op != ir_txd) {
2410 emit(MOV(dst_reg(MRF, param_base + 1, ir->shadow_comparitor->type,
2412 shadow_comparitor));
2416 /* Load the LOD info */
2417 if (ir->op == ir_tex || ir->op == ir_txl) {
2419 if (intel->gen >= 5) {
2420 mrf = param_base + 1;
2421 if (ir->shadow_comparitor) {
2422 writemask = WRITEMASK_Y;
2423 /* mlen already incremented */
2425 writemask = WRITEMASK_X;
2428 } else /* intel->gen == 4 */ {
2430 writemask = WRITEMASK_Z;
2432 emit(MOV(dst_reg(MRF, mrf, lod_type, writemask), lod));
2433 } else if (ir->op == ir_txf) {
2434 emit(MOV(dst_reg(MRF, param_base, lod_type, WRITEMASK_W), lod));
2435 } else if (ir->op == ir_txf_ms) {
2436 emit(MOV(dst_reg(MRF, param_base + 1, sample_index_type, WRITEMASK_X),
2440 /* on Gen7, there is an additional MCS parameter here after SI,
2441 * but we don't bother to emit it since it's always zero. If
2442 * we start supporting texturing from CMS surfaces, this will have
2445 } else if (ir->op == ir_txd) {
2446 const glsl_type *type = lod_type;
2448 if (intel->gen >= 5) {
2449 dPdx.swizzle = BRW_SWIZZLE4(SWIZZLE_X,SWIZZLE_X,SWIZZLE_Y,SWIZZLE_Y);
2450 dPdy.swizzle = BRW_SWIZZLE4(SWIZZLE_X,SWIZZLE_X,SWIZZLE_Y,SWIZZLE_Y);
2451 emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_XZ), dPdx));
2452 emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_YW), dPdy));
2455 if (ir->type->vector_elements == 3 || ir->shadow_comparitor) {
2456 dPdx.swizzle = BRW_SWIZZLE_ZZZZ;
2457 dPdy.swizzle = BRW_SWIZZLE_ZZZZ;
2458 emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_X), dPdx));
2459 emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_Y), dPdy));
2462 if (ir->shadow_comparitor) {
2463 emit(MOV(dst_reg(MRF, param_base + 2,
2464 ir->shadow_comparitor->type, WRITEMASK_Z),
2465 shadow_comparitor));
2468 } else /* intel->gen == 4 */ {
2469 emit(MOV(dst_reg(MRF, param_base + 1, type, WRITEMASK_XYZ), dPdx));
2470 emit(MOV(dst_reg(MRF, param_base + 2, type, WRITEMASK_XYZ), dPdy));
2478 /* fixup num layers (z) for cube arrays: hardware returns faces * layers;
2479 * spec requires layers.
2481 if (ir->op == ir_txs) {
2482 glsl_type const *type = ir->sampler->type;
2483 if (type->sampler_dimensionality == GLSL_SAMPLER_DIM_CUBE &&
2484 type->sampler_array) {
2485 emit_math(SHADER_OPCODE_INT_QUOTIENT,
2486 with_writemask(inst->dst, WRITEMASK_Z),
2487 src_reg(inst->dst), src_reg(6));
2491 swizzle_result(ir, src_reg(inst->dst), sampler);
2495 vec4_visitor::swizzle_result(ir_texture *ir, src_reg orig_val, int sampler)
2497 int s = key->tex.swizzles[sampler];
2499 this->result = src_reg(this, ir->type);
2500 dst_reg swizzled_result(this->result);
2502 if (ir->op == ir_txs || ir->type == glsl_type::float_type
2503 || s == SWIZZLE_NOOP) {
2504 emit(MOV(swizzled_result, orig_val));
2508 int zero_mask = 0, one_mask = 0, copy_mask = 0;
2511 for (int i = 0; i < 4; i++) {
2512 switch (GET_SWZ(s, i)) {
2514 zero_mask |= (1 << i);
2517 one_mask |= (1 << i);
2520 copy_mask |= (1 << i);
2521 swizzle[i] = GET_SWZ(s, i);
2527 orig_val.swizzle = BRW_SWIZZLE4(swizzle[0], swizzle[1], swizzle[2], swizzle[3]);
2528 swizzled_result.writemask = copy_mask;
2529 emit(MOV(swizzled_result, orig_val));
2533 swizzled_result.writemask = zero_mask;
2534 emit(MOV(swizzled_result, src_reg(0.0f)));
2538 swizzled_result.writemask = one_mask;
2539 emit(MOV(swizzled_result, src_reg(1.0f)));
2544 vec4_visitor::visit(ir_return *ir)
2546 assert(!"not reached");
2550 vec4_visitor::visit(ir_discard *ir)
2552 assert(!"not reached");
2556 vec4_visitor::visit(ir_if *ir)
2558 /* Don't point the annotation at the if statement, because then it plus
2559 * the then and else blocks get printed.
2561 this->base_ir = ir->condition;
2563 if (intel->gen == 6) {
2567 emit_bool_to_cond_code(ir->condition, &predicate);
2568 emit(IF(predicate));
2571 visit_instructions(&ir->then_instructions);
2573 if (!ir->else_instructions.is_empty()) {
2574 this->base_ir = ir->condition;
2575 emit(BRW_OPCODE_ELSE);
2577 visit_instructions(&ir->else_instructions);
2580 this->base_ir = ir->condition;
2581 emit(BRW_OPCODE_ENDIF);
2585 vec4_visitor::emit_ndc_computation()
2587 /* Get the position */
2588 src_reg pos = src_reg(output_reg[VARYING_SLOT_POS]);
2590 /* Build ndc coords, which are (x/w, y/w, z/w, 1/w) */
2591 dst_reg ndc = dst_reg(this, glsl_type::vec4_type);
2592 output_reg[BRW_VARYING_SLOT_NDC] = ndc;
2594 current_annotation = "NDC";
2595 dst_reg ndc_w = ndc;
2596 ndc_w.writemask = WRITEMASK_W;
2597 src_reg pos_w = pos;
2598 pos_w.swizzle = BRW_SWIZZLE4(SWIZZLE_W, SWIZZLE_W, SWIZZLE_W, SWIZZLE_W);
2599 emit_math(SHADER_OPCODE_RCP, ndc_w, pos_w);
2601 dst_reg ndc_xyz = ndc;
2602 ndc_xyz.writemask = WRITEMASK_XYZ;
2604 emit(MUL(ndc_xyz, pos, src_reg(ndc_w)));
2608 vec4_visitor::emit_psiz_and_flags(struct brw_reg reg)
2610 if (intel->gen < 6 &&
2611 ((prog_data->vue_map.slots_valid & VARYING_BIT_PSIZ) ||
2612 key->userclip_active || brw->has_negative_rhw_bug)) {
2613 dst_reg header1 = dst_reg(this, glsl_type::uvec4_type);
2614 dst_reg header1_w = header1;
2615 header1_w.writemask = WRITEMASK_W;
2618 emit(MOV(header1, 0u));
2620 if (prog_data->vue_map.slots_valid & VARYING_BIT_PSIZ) {
2621 src_reg psiz = src_reg(output_reg[VARYING_SLOT_PSIZ]);
2623 current_annotation = "Point size";
2624 emit(MUL(header1_w, psiz, src_reg((float)(1 << 11))));
2625 emit(AND(header1_w, src_reg(header1_w), 0x7ff << 8));
2628 current_annotation = "Clipping flags";
2629 for (i = 0; i < key->nr_userclip_plane_consts; i++) {
2630 vec4_instruction *inst;
2631 gl_varying_slot slot = (prog_data->vue_map.slots_valid & VARYING_BIT_CLIP_VERTEX)
2632 ? VARYING_SLOT_CLIP_VERTEX : VARYING_SLOT_POS;
2634 inst = emit(DP4(dst_null_f(), src_reg(output_reg[slot]),
2635 src_reg(this->userplane[i])));
2636 inst->conditional_mod = BRW_CONDITIONAL_L;
2638 inst = emit(OR(header1_w, src_reg(header1_w), 1u << i));
2639 inst->predicate = BRW_PREDICATE_NORMAL;
2642 /* i965 clipping workaround:
2643 * 1) Test for -ve rhw
2645 * set ndc = (0,0,0,0)
2648 * Later, clipping will detect ucp[6] and ensure the primitive is
2649 * clipped against all fixed planes.
2651 if (brw->has_negative_rhw_bug) {
2652 src_reg ndc_w = src_reg(output_reg[BRW_VARYING_SLOT_NDC]);
2653 ndc_w.swizzle = BRW_SWIZZLE_WWWW;
2654 emit(CMP(dst_null_f(), ndc_w, src_reg(0.0f), BRW_CONDITIONAL_L));
2655 vec4_instruction *inst;
2656 inst = emit(OR(header1_w, src_reg(header1_w), src_reg(1u << 6)));
2657 inst->predicate = BRW_PREDICATE_NORMAL;
2658 inst = emit(MOV(output_reg[BRW_VARYING_SLOT_NDC], src_reg(0.0f)));
2659 inst->predicate = BRW_PREDICATE_NORMAL;
2662 emit(MOV(retype(reg, BRW_REGISTER_TYPE_UD), src_reg(header1)));
2663 } else if (intel->gen < 6) {
2664 emit(MOV(retype(reg, BRW_REGISTER_TYPE_UD), 0u));
2666 emit(MOV(retype(reg, BRW_REGISTER_TYPE_D), src_reg(0)));
2667 if (prog_data->vue_map.slots_valid & VARYING_BIT_PSIZ) {
2668 emit(MOV(brw_writemask(reg, WRITEMASK_W),
2669 src_reg(output_reg[VARYING_SLOT_PSIZ])));
2671 if (prog_data->vue_map.slots_valid & VARYING_BIT_LAYER) {
2672 emit(MOV(retype(brw_writemask(reg, WRITEMASK_Y), BRW_REGISTER_TYPE_D),
2673 src_reg(output_reg[VARYING_SLOT_LAYER])));
2679 vec4_visitor::emit_clip_distances(struct brw_reg reg, int offset)
2681 if (intel->gen < 6) {
2682 /* Clip distance slots are set aside in gen5, but they are not used. It
2683 * is not clear whether we actually need to set aside space for them,
2684 * but the performance cost is negligible.
2689 /* From the GLSL 1.30 spec, section 7.1 (Vertex Shader Special Variables):
2691 * "If a linked set of shaders forming the vertex stage contains no
2692 * static write to gl_ClipVertex or gl_ClipDistance, but the
2693 * application has requested clipping against user clip planes through
2694 * the API, then the coordinate written to gl_Position is used for
2695 * comparison against the user clip planes."
2697 * This function is only called if the shader didn't write to
2698 * gl_ClipDistance. Accordingly, we use gl_ClipVertex to perform clipping
2699 * if the user wrote to it; otherwise we use gl_Position.
2701 gl_varying_slot clip_vertex = VARYING_SLOT_CLIP_VERTEX;
2702 if (!(prog_data->vue_map.slots_valid & VARYING_BIT_CLIP_VERTEX)) {
2703 clip_vertex = VARYING_SLOT_POS;
2706 for (int i = 0; i + offset < key->nr_userclip_plane_consts && i < 4;
2708 emit(DP4(dst_reg(brw_writemask(reg, 1 << i)),
2709 src_reg(output_reg[clip_vertex]),
2710 src_reg(this->userplane[i + offset])));
2715 vec4_visitor::emit_generic_urb_slot(dst_reg reg, int varying)
2717 assert (varying < VARYING_SLOT_MAX);
2718 reg.type = output_reg[varying].type;
2719 current_annotation = output_reg_annotation[varying];
2720 /* Copy the register, saturating if necessary */
2721 vec4_instruction *inst = emit(MOV(reg,
2722 src_reg(output_reg[varying])));
2723 if ((varying == VARYING_SLOT_COL0 ||
2724 varying == VARYING_SLOT_COL1 ||
2725 varying == VARYING_SLOT_BFC0 ||
2726 varying == VARYING_SLOT_BFC1) &&
2727 key->clamp_vertex_color) {
2728 inst->saturate = true;
2733 vec4_visitor::emit_urb_slot(int mrf, int varying)
2735 struct brw_reg hw_reg = brw_message_reg(mrf);
2736 dst_reg reg = dst_reg(MRF, mrf);
2737 reg.type = BRW_REGISTER_TYPE_F;
2740 case VARYING_SLOT_PSIZ:
2741 /* PSIZ is always in slot 0, and is coupled with other flags. */
2742 current_annotation = "indices, point width, clip flags";
2743 emit_psiz_and_flags(hw_reg);
2745 case BRW_VARYING_SLOT_NDC:
2746 current_annotation = "NDC";
2747 emit(MOV(reg, src_reg(output_reg[BRW_VARYING_SLOT_NDC])));
2749 case BRW_VARYING_SLOT_POS_DUPLICATE:
2750 case VARYING_SLOT_POS:
2751 current_annotation = "gl_Position";
2752 emit(MOV(reg, src_reg(output_reg[VARYING_SLOT_POS])));
2754 case VARYING_SLOT_CLIP_DIST0:
2755 case VARYING_SLOT_CLIP_DIST1:
2756 if (this->key->uses_clip_distance) {
2757 emit_generic_urb_slot(reg, varying);
2759 current_annotation = "user clip distances";
2760 emit_clip_distances(hw_reg, (varying - VARYING_SLOT_CLIP_DIST0) * 4);
2763 case VARYING_SLOT_EDGE:
2764 /* This is present when doing unfilled polygons. We're supposed to copy
2765 * the edge flag from the user-provided vertex array
2766 * (glEdgeFlagPointer), or otherwise we'll copy from the current value
2767 * of that attribute (starts as 1.0f). This is then used in clipping to
2768 * determine which edges should be drawn as wireframe.
2770 current_annotation = "edge flag";
2771 emit(MOV(reg, src_reg(dst_reg(ATTR, VERT_ATTRIB_EDGEFLAG,
2772 glsl_type::float_type, WRITEMASK_XYZW))));
2774 case BRW_VARYING_SLOT_PAD:
2775 /* No need to write to this slot */
2778 emit_generic_urb_slot(reg, varying);
2784 align_interleaved_urb_mlen(struct brw_context *brw, int mlen)
2786 struct intel_context *intel = &brw->intel;
2788 if (intel->gen >= 6) {
2789 /* URB data written (does not include the message header reg) must
2790 * be a multiple of 256 bits, or 2 VS registers. See vol5c.5,
2791 * section 5.4.3.2.2: URB_INTERLEAVED.
2793 * URB entries are allocated on a multiple of 1024 bits, so an
2794 * extra 128 bits written here to make the end align to 256 is
2797 if ((mlen % 2) != 1)
2805 vec4_vs_visitor::emit_urb_write_header(int mrf)
2807 /* No need to do anything for VS; an implied write to this MRF will be
2808 * performed by VS_OPCODE_URB_WRITE.
2814 vec4_vs_visitor::emit_urb_write_opcode(bool complete)
2816 /* For VS, the URB writes end the thread. */
2818 if (INTEL_DEBUG & DEBUG_SHADER_TIME)
2819 emit_shader_time_end();
2822 vec4_instruction *inst = emit(VS_OPCODE_URB_WRITE);
2823 inst->eot = complete;
2829 * Generates the VUE payload plus the necessary URB write instructions to
2832 * The VUE layout is documented in Volume 2a.
2835 vec4_visitor::emit_vertex()
2837 /* MRF 0 is reserved for the debugger, so start with message header
2842 /* In the process of generating our URB write message contents, we
2843 * may need to unspill a register or load from an array. Those
2844 * reads would use MRFs 14-15.
2846 int max_usable_mrf = 13;
2848 /* The following assertion verifies that max_usable_mrf causes an
2849 * even-numbered amount of URB write data, which will meet gen6's
2850 * requirements for length alignment.
2852 assert ((max_usable_mrf - base_mrf) % 2 == 0);
2854 /* First mrf is the g0-based message header containing URB handles and
2857 emit_urb_write_header(mrf++);
2859 if (intel->gen < 6) {
2860 emit_ndc_computation();
2863 /* Set up the VUE data for the first URB write */
2865 for (slot = 0; slot < prog_data->vue_map.num_slots; ++slot) {
2866 emit_urb_slot(mrf++, prog_data->vue_map.slot_to_varying[slot]);
2868 /* If this was max_usable_mrf, we can't fit anything more into this URB
2871 if (mrf > max_usable_mrf) {
2877 bool complete = slot >= prog_data->vue_map.num_slots;
2878 current_annotation = "URB write";
2879 vec4_instruction *inst = emit_urb_write_opcode(complete);
2880 inst->base_mrf = base_mrf;
2881 inst->mlen = align_interleaved_urb_mlen(brw, mrf - base_mrf);
2883 /* Optional second URB write */
2887 for (; slot < prog_data->vue_map.num_slots; ++slot) {
2888 assert(mrf < max_usable_mrf);
2890 emit_urb_slot(mrf++, prog_data->vue_map.slot_to_varying[slot]);
2893 current_annotation = "URB write";
2894 inst = emit_urb_write_opcode(true /* complete */);
2895 inst->base_mrf = base_mrf;
2896 inst->mlen = align_interleaved_urb_mlen(brw, mrf - base_mrf);
2897 /* URB destination offset. In the previous write, we got MRFs
2898 * 2-13 minus the one header MRF, so 12 regs. URB offset is in
2899 * URB row increments, and each of our MRFs is half of one of
2900 * those, since we're doing interleaved writes.
2902 inst->offset = (max_usable_mrf - base_mrf) / 2;
2907 vec4_vs_visitor::emit_thread_end()
2909 /* For VS, we always end the thread by emitting a single vertex.
2910 * emit_urb_write_opcode() will take care of setting the eot flag on the
2917 vec4_visitor::get_scratch_offset(vec4_instruction *inst,
2918 src_reg *reladdr, int reg_offset)
2920 /* Because we store the values to scratch interleaved like our
2921 * vertex data, we need to scale the vec4 index by 2.
2923 int message_header_scale = 2;
2925 /* Pre-gen6, the message header uses byte offsets instead of vec4
2926 * (16-byte) offset units.
2929 message_header_scale *= 16;
2932 src_reg index = src_reg(this, glsl_type::int_type);
2934 emit_before(inst, ADD(dst_reg(index), *reladdr, src_reg(reg_offset)));
2935 emit_before(inst, MUL(dst_reg(index),
2936 index, src_reg(message_header_scale)));
2940 return src_reg(reg_offset * message_header_scale);
2945 vec4_visitor::get_pull_constant_offset(vec4_instruction *inst,
2946 src_reg *reladdr, int reg_offset)
2949 src_reg index = src_reg(this, glsl_type::int_type);
2951 emit_before(inst, ADD(dst_reg(index), *reladdr, src_reg(reg_offset)));
2953 /* Pre-gen6, the message header uses byte offsets instead of vec4
2954 * (16-byte) offset units.
2956 if (intel->gen < 6) {
2957 emit_before(inst, MUL(dst_reg(index), index, src_reg(16)));
2962 int message_header_scale = intel->gen < 6 ? 16 : 1;
2963 return src_reg(reg_offset * message_header_scale);
2968 * Emits an instruction before @inst to load the value named by @orig_src
2969 * from scratch space at @base_offset to @temp.
2971 * @base_offset is measured in 32-byte units (the size of a register).
2974 vec4_visitor::emit_scratch_read(vec4_instruction *inst,
2975 dst_reg temp, src_reg orig_src,
2978 int reg_offset = base_offset + orig_src.reg_offset;
2979 src_reg index = get_scratch_offset(inst, orig_src.reladdr, reg_offset);
2981 emit_before(inst, SCRATCH_READ(temp, index));
2985 * Emits an instruction after @inst to store the value to be written
2986 * to @orig_dst to scratch space at @base_offset, from @temp.
2988 * @base_offset is measured in 32-byte units (the size of a register).
2991 vec4_visitor::emit_scratch_write(vec4_instruction *inst, int base_offset)
2993 int reg_offset = base_offset + inst->dst.reg_offset;
2994 src_reg index = get_scratch_offset(inst, inst->dst.reladdr, reg_offset);
2996 /* Create a temporary register to store *inst's result in.
2998 * We have to be careful in MOVing from our temporary result register in
2999 * the scratch write. If we swizzle from channels of the temporary that
3000 * weren't initialized, it will confuse live interval analysis, which will
3001 * make spilling fail to make progress.
3003 src_reg temp = src_reg(this, glsl_type::vec4_type);
3004 temp.type = inst->dst.type;
3005 int first_writemask_chan = ffs(inst->dst.writemask) - 1;
3007 for (int i = 0; i < 4; i++)
3008 if (inst->dst.writemask & (1 << i))
3011 swizzles[i] = first_writemask_chan;
3012 temp.swizzle = BRW_SWIZZLE4(swizzles[0], swizzles[1],
3013 swizzles[2], swizzles[3]);
3015 dst_reg dst = dst_reg(brw_writemask(brw_vec8_grf(0, 0),
3016 inst->dst.writemask));
3017 vec4_instruction *write = SCRATCH_WRITE(dst, temp, index);
3018 write->predicate = inst->predicate;
3019 write->ir = inst->ir;
3020 write->annotation = inst->annotation;
3021 inst->insert_after(write);
3023 inst->dst.file = temp.file;
3024 inst->dst.reg = temp.reg;
3025 inst->dst.reg_offset = temp.reg_offset;
3026 inst->dst.reladdr = NULL;
3030 * We can't generally support array access in GRF space, because a
3031 * single instruction's destination can only span 2 contiguous
3032 * registers. So, we send all GRF arrays that get variable index
3033 * access to scratch space.
3036 vec4_visitor::move_grf_array_access_to_scratch()
3038 int scratch_loc[this->virtual_grf_count];
3040 for (int i = 0; i < this->virtual_grf_count; i++) {
3041 scratch_loc[i] = -1;
3044 /* First, calculate the set of virtual GRFs that need to be punted
3045 * to scratch due to having any array access on them, and where in
3048 foreach_list(node, &this->instructions) {
3049 vec4_instruction *inst = (vec4_instruction *)node;
3051 if (inst->dst.file == GRF && inst->dst.reladdr &&
3052 scratch_loc[inst->dst.reg] == -1) {
3053 scratch_loc[inst->dst.reg] = c->last_scratch;
3054 c->last_scratch += this->virtual_grf_sizes[inst->dst.reg];
3057 for (int i = 0 ; i < 3; i++) {
3058 src_reg *src = &inst->src[i];
3060 if (src->file == GRF && src->reladdr &&
3061 scratch_loc[src->reg] == -1) {
3062 scratch_loc[src->reg] = c->last_scratch;
3063 c->last_scratch += this->virtual_grf_sizes[src->reg];
3068 /* Now, for anything that will be accessed through scratch, rewrite
3069 * it to load/store. Note that this is a _safe list walk, because
3070 * we may generate a new scratch_write instruction after the one
3073 foreach_list_safe(node, &this->instructions) {
3074 vec4_instruction *inst = (vec4_instruction *)node;
3076 /* Set up the annotation tracking for new generated instructions. */
3078 current_annotation = inst->annotation;
3080 if (inst->dst.file == GRF && scratch_loc[inst->dst.reg] != -1) {
3081 emit_scratch_write(inst, scratch_loc[inst->dst.reg]);
3084 for (int i = 0 ; i < 3; i++) {
3085 if (inst->src[i].file != GRF || scratch_loc[inst->src[i].reg] == -1)
3088 dst_reg temp = dst_reg(this, glsl_type::vec4_type);
3090 emit_scratch_read(inst, temp, inst->src[i],
3091 scratch_loc[inst->src[i].reg]);
3093 inst->src[i].file = temp.file;
3094 inst->src[i].reg = temp.reg;
3095 inst->src[i].reg_offset = temp.reg_offset;
3096 inst->src[i].reladdr = NULL;
3102 * Emits an instruction before @inst to load the value named by @orig_src
3103 * from the pull constant buffer (surface) at @base_offset to @temp.
3106 vec4_visitor::emit_pull_constant_load(vec4_instruction *inst,
3107 dst_reg temp, src_reg orig_src,
3110 int reg_offset = base_offset + orig_src.reg_offset;
3111 src_reg index = src_reg((unsigned)SURF_INDEX_VERT_CONST_BUFFER);
3112 src_reg offset = get_pull_constant_offset(inst, orig_src.reladdr, reg_offset);
3113 vec4_instruction *load;
3115 if (intel->gen >= 7) {
3116 dst_reg grf_offset = dst_reg(this, glsl_type::int_type);
3117 grf_offset.type = offset.type;
3118 emit_before(inst, MOV(grf_offset, offset));
3120 load = new(mem_ctx) vec4_instruction(this,
3121 VS_OPCODE_PULL_CONSTANT_LOAD_GEN7,
3122 temp, index, src_reg(grf_offset));
3124 load = new(mem_ctx) vec4_instruction(this, VS_OPCODE_PULL_CONSTANT_LOAD,
3125 temp, index, offset);
3126 load->base_mrf = 14;
3129 emit_before(inst, load);
3133 * Implements array access of uniforms by inserting a
3134 * PULL_CONSTANT_LOAD instruction.
3136 * Unlike temporary GRF array access (where we don't support it due to
3137 * the difficulty of doing relative addressing on instruction
3138 * destinations), we could potentially do array access of uniforms
3139 * that were loaded in GRF space as push constants. In real-world
3140 * usage we've seen, though, the arrays being used are always larger
3141 * than we could load as push constants, so just always move all
3142 * uniform array access out to a pull constant buffer.
3145 vec4_visitor::move_uniform_array_access_to_pull_constants()
3147 int pull_constant_loc[this->uniforms];
3149 for (int i = 0; i < this->uniforms; i++) {
3150 pull_constant_loc[i] = -1;
3153 /* Walk through and find array access of uniforms. Put a copy of that
3154 * uniform in the pull constant buffer.
3156 * Note that we don't move constant-indexed accesses to arrays. No
3157 * testing has been done of the performance impact of this choice.
3159 foreach_list_safe(node, &this->instructions) {
3160 vec4_instruction *inst = (vec4_instruction *)node;
3162 for (int i = 0 ; i < 3; i++) {
3163 if (inst->src[i].file != UNIFORM || !inst->src[i].reladdr)
3166 int uniform = inst->src[i].reg;
3168 /* If this array isn't already present in the pull constant buffer,
3171 if (pull_constant_loc[uniform] == -1) {
3172 const float **values = &prog_data->param[uniform * 4];
3174 pull_constant_loc[uniform] = prog_data->nr_pull_params / 4;
3176 for (int j = 0; j < uniform_size[uniform] * 4; j++) {
3177 prog_data->pull_param[prog_data->nr_pull_params++]
3182 /* Set up the annotation tracking for new generated instructions. */
3184 current_annotation = inst->annotation;
3186 dst_reg temp = dst_reg(this, glsl_type::vec4_type);
3188 emit_pull_constant_load(inst, temp, inst->src[i],
3189 pull_constant_loc[uniform]);
3191 inst->src[i].file = temp.file;
3192 inst->src[i].reg = temp.reg;
3193 inst->src[i].reg_offset = temp.reg_offset;
3194 inst->src[i].reladdr = NULL;
3198 /* Now there are no accesses of the UNIFORM file with a reladdr, so
3199 * no need to track them as larger-than-vec4 objects. This will be
3200 * relied on in cutting out unused uniform vectors from push
3203 split_uniform_registers();
3207 vec4_visitor::resolve_ud_negate(src_reg *reg)
3209 if (reg->type != BRW_REGISTER_TYPE_UD ||
3213 src_reg temp = src_reg(this, glsl_type::uvec4_type);
3214 emit(BRW_OPCODE_MOV, dst_reg(temp), *reg);
3218 vec4_visitor::vec4_visitor(struct brw_context *brw,
3219 struct brw_vec4_compile *c,
3220 struct gl_program *prog,
3221 const struct brw_vec4_prog_key *key,
3222 struct brw_vec4_prog_data *prog_data,
3223 struct gl_shader_program *shader_prog,
3224 struct brw_shader *shader,
3227 : debug_flag(debug_flag)
3230 this->intel = &brw->intel;
3231 this->ctx = &intel->ctx;
3232 this->shader_prog = shader_prog;
3233 this->shader = shader;
3235 this->mem_ctx = mem_ctx;
3236 this->failed = false;
3238 this->base_ir = NULL;
3239 this->current_annotation = NULL;
3240 memset(this->output_reg_annotation, 0, sizeof(this->output_reg_annotation));
3245 this->prog_data = prog_data;
3247 this->variable_ht = hash_table_ctor(0,
3248 hash_table_pointer_hash,
3249 hash_table_pointer_compare);
3251 this->virtual_grf_start = NULL;
3252 this->virtual_grf_end = NULL;
3253 this->virtual_grf_sizes = NULL;
3254 this->virtual_grf_count = 0;
3255 this->virtual_grf_reg_map = NULL;
3256 this->virtual_grf_reg_count = 0;
3257 this->virtual_grf_array_size = 0;
3258 this->live_intervals_valid = false;
3260 this->max_grf = intel->gen >= 7 ? GEN7_MRF_HACK_START : BRW_MAX_GRF;
3265 vec4_visitor::~vec4_visitor()
3267 hash_table_dtor(this->variable_ht);
3271 vec4_vs_visitor::vec4_vs_visitor(struct brw_context *brw,
3272 struct brw_vs_compile *vs_compile,
3273 struct brw_vs_prog_data *vs_prog_data,
3274 struct gl_shader_program *prog,
3275 struct brw_shader *shader,
3277 : vec4_visitor(brw, &vs_compile->base, &vs_compile->vp->program.Base,
3278 &vs_compile->key.base, &vs_prog_data->base, prog, shader,
3279 mem_ctx, INTEL_DEBUG & DEBUG_VS),
3280 vs_compile(vs_compile),
3281 vs_prog_data(vs_prog_data)
3287 vec4_visitor::fail(const char *format, ...)
3297 va_start(va, format);
3298 msg = ralloc_vasprintf(mem_ctx, format, va);
3300 msg = ralloc_asprintf(mem_ctx, "VS compile failed: %s\n", msg);
3302 this->fail_msg = msg;
3305 fprintf(stderr, "%s", msg);
3309 } /* namespace brw */