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https://gitlab.freedesktop.org/mesa/mesa.git
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44d68fd06f
Following a discussion in #dri-devel, I think this makes more sense than implementing it as RSQ RCP CMP as Mesa did. The i965 has a hardware sqrt that should work, and AMD is suppposed to be able to implement it as RSQ RCP with an alternate floating point mode so that the 0.0 case is handled like we want.
291 lines
8.7 KiB
C++
291 lines
8.7 KiB
C++
/*
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* Copyright © 2010 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include "glsl_symbol_table.h"
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#include "glsl_parser_extras.h"
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#include "glsl_types.h"
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#include "ir.h"
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static void
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generate_unop(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type,
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enum ir_expression_operation op)
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{
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ir_dereference *const retval = new ir_dereference(declarations[16]);
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ir_dereference *const arg = new ir_dereference(declarations[0]);
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ir_rvalue *result;
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result = new ir_expression(op, type, arg, NULL);
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ir_instruction *inst = new ir_assignment(retval, result, NULL);
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instructions->push_tail(inst);
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}
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static void
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generate_binop(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type,
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enum ir_expression_operation op)
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{
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ir_dereference *const retval = new ir_dereference(declarations[16]);
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ir_dereference *const arg1 = new ir_dereference(declarations[0]);
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ir_dereference *const arg2 = new ir_dereference(declarations[1]);
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ir_rvalue *result;
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result = new ir_expression(op, type, arg1, arg2);
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ir_instruction *inst = new ir_assignment(retval, result, NULL);
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instructions->push_tail(inst);
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}
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static void
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generate_exp(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_unop(instructions, declarations, type, ir_unop_exp);
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}
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static void
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generate_log(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_unop(instructions, declarations, type, ir_unop_log);
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}
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static void
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generate_rsq(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_unop(instructions, declarations, type, ir_unop_rsq);
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}
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static void
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generate_sqrt(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_unop(instructions, declarations, type, ir_unop_sqrt);
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}
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static void
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generate_abs(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_unop(instructions, declarations, type, ir_unop_abs);
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}
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static void
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generate_ceil(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_unop(instructions, declarations, type, ir_unop_ceil);
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}
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static void
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generate_floor(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_unop(instructions, declarations, type, ir_unop_floor);
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}
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static void
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generate_mod(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_binop(instructions, declarations, type, ir_binop_mod);
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}
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static void
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generate_min(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_binop(instructions, declarations, type, ir_binop_min);
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}
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static void
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generate_max(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_binop(instructions, declarations, type, ir_binop_max);
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}
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static void
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generate_pow(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type)
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{
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generate_binop(instructions, declarations, type, ir_binop_pow);
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}
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void
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generate_function_instance(ir_function *f,
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const char *name,
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exec_list *instructions,
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int n_args,
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void (*generate)(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type),
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const glsl_type *type)
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{
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ir_variable *declarations[17];
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ir_function_signature *const sig = new ir_function_signature(type);
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f->signatures.push_tail(sig);
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ir_label *const label = new ir_label(name);
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instructions->push_tail(label);
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sig->definition = label;
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static const char *arg_names[] = {
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"arg0",
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"arg1"
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};
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int i;
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for (i = 0; i < n_args; i++) {
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ir_variable *var = new ir_variable(type, arg_names[i]);
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var->mode = ir_var_in;
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sig->parameters.push_tail(var);
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var = new ir_variable(type, arg_names[i]);
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declarations[i] = var;
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}
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ir_variable *retval = new ir_variable(type, "__retval");
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instructions->push_tail(retval);
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declarations[16] = retval;
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generate(instructions, declarations, type);
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}
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void
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make_gentype_function(glsl_symbol_table *symtab, exec_list *instructions,
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const char *name,
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int n_args,
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void (*generate)(exec_list *instructions,
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ir_variable **declarations,
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const glsl_type *type))
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{
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ir_function *const f = new ir_function(name);
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const glsl_type *vec2_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 2, 1);
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const glsl_type *vec3_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 3, 1);
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const glsl_type *vec4_type = glsl_type::get_instance(GLSL_TYPE_FLOAT, 4, 1);
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bool added = symtab->add_function(name, f);
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assert(added);
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generate_function_instance(f, name, instructions, n_args, generate,
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glsl_type::float_type);
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generate_function_instance(f, name, instructions, n_args, generate,
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vec2_type);
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generate_function_instance(f, name, instructions, n_args, generate,
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vec3_type);
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generate_function_instance(f, name, instructions, n_args, generate,
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vec4_type);
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}
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void
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generate_110_functions(glsl_symbol_table *symtab, exec_list *instructions)
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{
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/* FINISHME: radians() */
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/* FINISHME: degrees() */
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/* FINISHME: sin() */
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/* FINISHME: cos() */
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/* FINISHME: tan() */
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/* FINISHME: asin() */
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/* FINISHME: acos() */
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/* FINISHME: atan(y,x) */
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/* FINISHME: atan(y/x) */
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make_gentype_function(symtab, instructions, "pow", 2, generate_pow);
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make_gentype_function(symtab, instructions, "exp", 1, generate_exp);
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make_gentype_function(symtab, instructions, "log", 1, generate_log);
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/* FINISHME: exp2() */
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/* FINISHME: log2() */
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make_gentype_function(symtab, instructions, "sqrt", 1, generate_sqrt);
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make_gentype_function(symtab, instructions, "inversesqrt", 1, generate_rsq);
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make_gentype_function(symtab, instructions, "abs", 1, generate_abs);
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/* FINISHME: sign() */
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make_gentype_function(symtab, instructions, "floor", 1, generate_floor);
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make_gentype_function(symtab, instructions, "ceil", 1, generate_ceil);
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/* FINISHME: fract() */
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/* FINISHME: mod(x, float y) */
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make_gentype_function(symtab, instructions, "mod", 2, generate_mod);
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make_gentype_function(symtab, instructions, "min", 2, generate_min);
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/* FINISHME: min(x, float y) */
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make_gentype_function(symtab, instructions, "max", 2, generate_max);
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/* FINISHME: max(x, float y) */
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/* FINISHME: clamp() */
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/* FINISHME: clamp() */
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/* FINISHME: mix() */
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/* FINISHME: mix() */
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/* FINISHME: step() */
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/* FINISHME: step() */
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/* FINISHME: smoothstep() */
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/* FINISHME: smoothstep() */
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/* FINISHME: floor() */
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/* FINISHME: step() */
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/* FINISHME: length() */
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/* FINISHME: distance() */
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/* FINISHME: dot() */
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/* FINISHME: cross() */
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/* FINISHME: normalize() */
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/* FINISHME: ftransform() */
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/* FINISHME: faceforward() */
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/* FINISHME: reflect() */
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/* FINISHME: refract() */
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/* FINISHME: matrixCompMult() */
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/* FINISHME: lessThan() */
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/* FINISHME: lessThanEqual() */
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/* FINISHME: greaterThan() */
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/* FINISHME: greaterThanEqual() */
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/* FINISHME: equal() */
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/* FINISHME: notEqual() */
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/* FINISHME: any() */
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/* FINISHME: all() */
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/* FINISHME: not() */
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/* FINISHME: texture*() */
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/* FINISHME: shadow*() */
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/* FINISHME: dFd[xy]() */
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/* FINISHME: fwidth() */
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}
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void
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_mesa_glsl_initialize_functions(exec_list *instructions,
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struct _mesa_glsl_parse_state *state)
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{
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generate_110_functions(state->symbols, instructions);
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}
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