diff options
Diffstat (limited to 'src/glsl')
| -rw-r--r-- | src/glsl/ir_optimization.h | 4 | ||||
| -rw-r--r-- | src/glsl/lower_variable_index_to_cond_assign.cpp | 111 |
2 files changed, 73 insertions, 42 deletions
diff --git a/src/glsl/ir_optimization.h b/src/glsl/ir_optimization.h index 59a040751d9..f7808bdda9a 100644 --- a/src/glsl/ir_optimization.h +++ b/src/glsl/ir_optimization.h @@ -69,3 +69,7 @@ bool lower_variable_index_to_cond_assign(exec_list *instructions, bool lower_input, bool lower_output, bool lower_temp, bool lower_uniform); bool lower_quadop_vector(exec_list *instructions, bool dont_lower_swz); bool optimize_redundant_jumps(exec_list *instructions); + +ir_rvalue * +compare_index_block(exec_list *instructions, ir_variable *index, + unsigned base, unsigned components, void *mem_ctx); diff --git a/src/glsl/lower_variable_index_to_cond_assign.cpp b/src/glsl/lower_variable_index_to_cond_assign.cpp index 79fa58ec8d5..7792e6e624f 100644 --- a/src/glsl/lower_variable_index_to_cond_assign.cpp +++ b/src/glsl/lower_variable_index_to_cond_assign.cpp @@ -52,6 +52,70 @@ #include "glsl_types.h" #include "main/macros.h" +/** + * Generate a comparison value for a block of indices + * + * Lowering passes for non-constant indexing of arrays, matrices, or vectors + * can use this to generate blocks of index comparison values. + * + * \param instructions List where new instructions will be appended + * \param index \c ir_variable containing the desired index + * \param base Base value for this block of comparisons + * \param components Number of unique index values to compare. This must + * be on the range [1, 4]. + * \param mem_ctx ralloc memory context to be used for all allocations. + * + * \returns + * An \c ir_rvalue that \b must be cloned for each use in conditional + * assignments, etc. + */ +ir_rvalue * +compare_index_block(exec_list *instructions, ir_variable *index, + unsigned base, unsigned components, void *mem_ctx) +{ + ir_rvalue *broadcast_index = new(mem_ctx) ir_dereference_variable(index); + + assert(index->type->is_scalar()); + assert(index->type->base_type == GLSL_TYPE_INT); + assert(components >= 1 && components <= 4); + + if (components > 1) { + const ir_swizzle_mask m = { 0, 0, 0, 0, components, false }; + broadcast_index = new(mem_ctx) ir_swizzle(broadcast_index, m); + } + + /* Compare the desired index value with the next block of four indices. + */ + ir_constant_data test_indices_data; + memset(&test_indices_data, 0, sizeof(test_indices_data)); + test_indices_data.i[0] = base; + test_indices_data.i[1] = base + 1; + test_indices_data.i[2] = base + 2; + test_indices_data.i[3] = base + 3; + + ir_constant *const test_indices = + new(mem_ctx) ir_constant(broadcast_index->type, + &test_indices_data); + + ir_rvalue *const condition_val = + new(mem_ctx) ir_expression(ir_binop_equal, + &glsl_type::bool_type[components - 1], + broadcast_index, + test_indices); + + ir_variable *const condition = + new(mem_ctx) ir_variable(condition_val->type, + "dereference_condition", + ir_var_temporary); + instructions->push_tail(condition); + + ir_rvalue *const cond_deref = + new(mem_ctx) ir_dereference_variable(condition); + instructions->push_tail(new(mem_ctx) ir_assignment(cond_deref, condition_val, 0)); + + return cond_deref; +} + static inline bool is_array_or_matrix(const ir_instruction *ir) { @@ -204,54 +268,17 @@ struct switch_generator for (unsigned i = first; i < end; i += 4) { const unsigned comps = MIN2(condition_components, end - i); - ir_rvalue *broadcast_index = - new(this->mem_ctx) ir_dereference_variable(index); - - if (comps) { - const ir_swizzle_mask m = { 0, 0, 0, 0, comps, false }; - broadcast_index = new(this->mem_ctx) ir_swizzle(broadcast_index, m); - } - - /* Compare the desired index value with the next block of four indices. - */ - ir_constant_data test_indices_data; - memset(&test_indices_data, 0, sizeof(test_indices_data)); - test_indices_data.i[0] = i; - test_indices_data.i[1] = i + 1; - test_indices_data.i[2] = i + 2; - test_indices_data.i[3] = i + 3; - ir_constant *const test_indices = - new(this->mem_ctx) ir_constant(broadcast_index->type, - &test_indices_data); - - ir_rvalue *const condition_val = - new(this->mem_ctx) ir_expression(ir_binop_equal, - &glsl_type::bool_type[comps - 1], - broadcast_index, - test_indices); - - ir_variable *const condition = - new(this->mem_ctx) ir_variable(condition_val->type, - "dereference_array_condition", - ir_var_temporary); - list->push_tail(condition); - ir_rvalue *const cond_deref = - new(this->mem_ctx) ir_dereference_variable(condition); - list->push_tail(new(this->mem_ctx) ir_assignment(cond_deref, - condition_val, 0)); + compare_index_block(list, index, i, comps, this->mem_ctx); if (comps == 1) { - ir_rvalue *const cond_deref = - new(this->mem_ctx) ir_dereference_variable(condition); - - this->generator.generate(i, cond_deref, list); + this->generator.generate(i, cond_deref->clone(this->mem_ctx, NULL), + list); } else { for (unsigned j = 0; j < comps; j++) { - ir_rvalue *const cond_deref = - new(this->mem_ctx) ir_dereference_variable(condition); ir_rvalue *const cond_swiz = - new(this->mem_ctx) ir_swizzle(cond_deref, j, 0, 0, 0, 1); + new(this->mem_ctx) ir_swizzle(cond_deref->clone(this->mem_ctx, NULL), + j, 0, 0, 0, 1); this->generator.generate(i + j, cond_swiz, list); } |