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/*
* Copyright © 2014-2015 Broadcom
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef NIR_BUILDER_H
#define NIR_BUILDER_H
#include "nir_control_flow.h"
struct exec_list;
typedef struct nir_builder {
nir_cursor cursor;
nir_shader *shader;
nir_function_impl *impl;
} nir_builder;
static inline void
nir_builder_init(nir_builder *build, nir_function_impl *impl)
{
memset(build, 0, sizeof(*build));
build->impl = impl;
build->shader = impl->overload->function->shader;
}
static inline void
nir_builder_instr_insert(nir_builder *build, nir_instr *instr)
{
nir_instr_insert(build->cursor, instr);
/* Move the cursor forward. */
if (build->cursor.option == nir_cursor_after_instr)
build->cursor.instr = instr;
}
static inline void
nir_builder_cf_insert(nir_builder *build, nir_cf_node *cf)
{
nir_cf_node_insert(build->cursor, cf);
}
static inline nir_ssa_def *
nir_build_imm(nir_builder *build, unsigned num_components, nir_const_value value)
{
nir_load_const_instr *load_const =
nir_load_const_instr_create(build->shader, num_components);
if (!load_const)
return NULL;
load_const->value = value;
nir_builder_instr_insert(build, &load_const->instr);
return &load_const->def;
}
static inline nir_ssa_def *
nir_imm_float(nir_builder *build, float x)
{
nir_const_value v = { { .f = {x, 0, 0, 0} } };
return nir_build_imm(build, 1, v);
}
static inline nir_ssa_def *
nir_imm_vec4(nir_builder *build, float x, float y, float z, float w)
{
nir_const_value v = { { .f = {x, y, z, w} } };
return nir_build_imm(build, 4, v);
}
static inline nir_ssa_def *
nir_imm_int(nir_builder *build, int x)
{
nir_const_value v = { { .i = {x, 0, 0, 0} } };
return nir_build_imm(build, 1, v);
}
static inline nir_ssa_def *
nir_build_alu(nir_builder *build, nir_op op, nir_ssa_def *src0,
nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3)
{
const nir_op_info *op_info = &nir_op_infos[op];
nir_alu_instr *instr = nir_alu_instr_create(build->shader, op);
if (!instr)
return NULL;
instr->src[0].src = nir_src_for_ssa(src0);
if (src1)
instr->src[1].src = nir_src_for_ssa(src1);
if (src2)
instr->src[2].src = nir_src_for_ssa(src2);
if (src3)
instr->src[3].src = nir_src_for_ssa(src3);
/* Guess the number of components the destination temporary should have
* based on our input sizes, if it's not fixed for the op.
*/
unsigned num_components = op_info->output_size;
if (num_components == 0) {
for (unsigned i = 0; i < op_info->num_inputs; i++) {
if (op_info->input_sizes[i] == 0)
num_components = MAX2(num_components,
instr->src[i].src.ssa->num_components);
}
}
assert(num_components != 0);
/* Make sure we don't swizzle from outside of our source vector (like if a
* scalar value was passed into a multiply with a vector).
*/
for (unsigned i = 0; i < op_info->num_inputs; i++) {
for (unsigned j = instr->src[i].src.ssa->num_components; j < 4; j++) {
instr->src[i].swizzle[j] = instr->src[i].src.ssa->num_components - 1;
}
}
nir_ssa_dest_init(&instr->instr, &instr->dest.dest, num_components, NULL);
instr->dest.write_mask = (1 << num_components) - 1;
nir_builder_instr_insert(build, &instr->instr);
return &instr->dest.dest.ssa;
}
#define ALU1(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0) \
{ \
return nir_build_alu(build, nir_op_##op, src0, NULL, NULL, NULL); \
}
#define ALU2(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0, nir_ssa_def *src1) \
{ \
return nir_build_alu(build, nir_op_##op, src0, src1, NULL, NULL); \
}
#define ALU3(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0, \
nir_ssa_def *src1, nir_ssa_def *src2) \
{ \
return nir_build_alu(build, nir_op_##op, src0, src1, src2, NULL); \
}
#define ALU4(op) \
static inline nir_ssa_def * \
nir_##op(nir_builder *build, nir_ssa_def *src0, \
nir_ssa_def *src1, nir_ssa_def *src2, nir_ssa_def *src3) \
{ \
return nir_build_alu(build, nir_op_##op, src0, src1, src2, src3); \
}
#include "nir_builder_opcodes.h"
/**
* Similar to nir_fmov, but takes a nir_alu_src instead of a nir_ssa_def.
*/
static inline nir_ssa_def *
nir_fmov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
{
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_fmov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src;
nir_builder_instr_insert(build, &mov->instr);
return &mov->dest.dest.ssa;
}
static inline nir_ssa_def *
nir_imov_alu(nir_builder *build, nir_alu_src src, unsigned num_components)
{
nir_alu_instr *mov = nir_alu_instr_create(build->shader, nir_op_imov);
nir_ssa_dest_init(&mov->instr, &mov->dest.dest, num_components, NULL);
mov->dest.write_mask = (1 << num_components) - 1;
mov->src[0] = src;
nir_builder_instr_insert(build, &mov->instr);
return &mov->dest.dest.ssa;
}
/**
* Construct an fmov or imov that reswizzles the source's components.
*/
static inline nir_ssa_def *
nir_swizzle(nir_builder *build, nir_ssa_def *src, unsigned swiz[4],
unsigned num_components, bool use_fmov)
{
nir_alu_src alu_src = { NIR_SRC_INIT };
alu_src.src = nir_src_for_ssa(src);
for (int i = 0; i < 4; i++)
alu_src.swizzle[i] = swiz[i];
return use_fmov ? nir_fmov_alu(build, alu_src, num_components) :
nir_imov_alu(build, alu_src, num_components);
}
/**
* Turns a nir_src into a nir_ssa_def * so it can be passed to
* nir_build_alu()-based builder calls.
*/
static inline nir_ssa_def *
nir_ssa_for_src(nir_builder *build, nir_src src, int num_components)
{
if (src.is_ssa && src.ssa->num_components == num_components)
return src.ssa;
nir_alu_src alu = { NIR_SRC_INIT };
alu.src = src;
for (int j = 0; j < 4; j++)
alu.swizzle[j] = j;
return nir_imov_alu(build, alu, num_components);
}
#endif /* NIR_BUILDER_H */
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