/*
* Copyright © 2010 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#pragma once
#include "brw_shader.h"
extern "C" {
#include <sys/types.h>
#include "main/macros.h"
#include "main/shaderobj.h"
#include "main/uniforms.h"
#include "program/prog_parameter.h"
#include "program/prog_print.h"
#include "program/prog_optimize.h"
#include "program/register_allocate.h"
#include "program/sampler.h"
#include "program/hash_table.h"
#include "brw_context.h"
#include "brw_eu.h"
#include "brw_wm.h"
#include "brw_shader.h"
}
#include "glsl/glsl_types.h"
#include "glsl/ir.h"
class bblock_t;
namespace {
struct acp_entry;
}
class fs_reg {
public:
/* Callers of this ralloc-based new need not call delete. It's
* easier to just ralloc_free 'ctx' (or any of its ancestors). */
static void* operator new(size_t size, void *ctx)
{
void *node;
node = ralloc_size(ctx, size);
assert(node != NULL);
return node;
}
void init();
fs_reg();
fs_reg(float f);
fs_reg(int32_t i);
fs_reg(uint32_t u);
fs_reg(struct brw_reg fixed_hw_reg);
fs_reg(enum register_file file, int reg);
fs_reg(enum register_file file, int reg, uint32_t type);
fs_reg(class fs_visitor *v, const struct glsl_type *type);
bool equals(const fs_reg &r) const;
bool is_zero() const;
bool is_one() const;
bool is_valid_3src() const;
/** Register file: ARF, GRF, MRF, IMM. */
enum register_file file;
/**
* Register number. For ARF/MRF, it's the hardware register. For
* GRF, it's a virtual register number until register allocation
*/
int reg;
/**
* For virtual registers, this is a hardware register offset from
* the start of the register block (for example, a constant index
* in an array access).
*/
int reg_offset;
/** Register type. BRW_REGISTER_TYPE_* */
int type;
bool negate;
bool abs;
bool sechalf;
struct brw_reg fixed_hw_reg;
int smear; /* -1, or a channel of the reg to smear to all channels. */
/** Value for file == IMM */
union {
int32_t i;
uint32_t u;
float f;
} imm;
fs_reg *reladdr;
};
static const fs_reg reg_undef;
static const fs_reg reg_null_f(ARF, BRW_ARF_NULL, BRW_REGISTER_TYPE_F);
static const fs_reg reg_null_d(ARF, BRW_ARF_NULL, BRW_REGISTER_TYPE_D);
class ip_record : public exec_node {
public:
static void* operator new(size_t size, void *ctx)
{
void *node;
node = rzalloc_size(ctx, size);
assert(node != NULL);
return node;
}
ip_record(int ip)
{
this->ip = ip;
}
int ip;
};
class fs_inst : public backend_instruction {
public:
/* Callers of this ralloc-based new need not call delete. It's
* easier to just ralloc_free 'ctx' (or any of its ancestors). */
static void* operator new(size_t size, void *ctx)
{
void *node;
node = rzalloc_size(ctx, size);
assert(node != NULL);
return node;
}
void init();
fs_inst();
fs_inst(enum opcode opcode);
fs_inst(enum opcode opcode, fs_reg dst);
fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0);
fs_inst(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst(enum opcode opcode, fs_reg dst,
fs_reg src0, fs_reg src1,fs_reg src2);
bool equals(fs_inst *inst);
bool overwrites_reg(const fs_reg ®);
bool is_send_from_grf();
bool is_partial_write();
fs_reg dst;
fs_reg src[3];
bool saturate;
int conditional_mod; /**< BRW_CONDITIONAL_* */
/* Chooses which flag subregister (f0.0 or f0.1) is used for conditional
* mod and predication.
*/
uint8_t flag_subreg;
int mlen; /**< SEND message length */
int regs_written; /**< Number of vgrfs written by a SEND message, or 1 */
int base_mrf; /**< First MRF in the SEND message, if mlen is nonzero. */
uint32_t texture_offset; /**< Texture offset bitfield */
int sampler;
int target; /**< MRT target. */
bool eot;
bool header_present;
bool shadow_compare;
bool force_uncompressed;
bool force_sechalf;
bool force_writemask_all;
uint32_t offset; /* spill/unspill offset */
/** @{
* Annotation for the generated IR. One of the two can be set.
*/
const void *ir;
const char *annotation;
/** @} */
};
/**
* The fragment shader front-end.
*
* Translates either GLSL IR or Mesa IR (for ARB_fragment_program) into FS IR.
*/
class fs_visitor : public backend_visitor
{
public:
fs_visitor(struct brw_context *brw,
struct brw_wm_compile *c,
struct gl_shader_program *shader_prog,
struct gl_fragment_program *fp,
unsigned dispatch_width);
~fs_visitor();
fs_reg *variable_storage(ir_variable *var);
int virtual_grf_alloc(int size);
void import_uniforms(fs_visitor *v);
void visit(ir_variable *ir);
void visit(ir_assignment *ir);
void visit(ir_dereference_variable *ir);
void visit(ir_dereference_record *ir);
void visit(ir_dereference_array *ir);
void visit(ir_expression *ir);
void visit(ir_texture *ir);
void visit(ir_if *ir);
void visit(ir_constant *ir);
void visit(ir_swizzle *ir);
void visit(ir_return *ir);
void visit(ir_loop *ir);
void visit(ir_loop_jump *ir);
void visit(ir_discard *ir);
void visit(ir_call *ir);
void visit(ir_function *ir);
void visit(ir_function_signature *ir);
void swizzle_result(ir_texture *ir, fs_reg orig_val, int sampler);
bool can_do_source_mods(fs_inst *inst);
fs_inst *emit(fs_inst inst);
fs_inst *emit(fs_inst *inst);
void emit(exec_list list);
fs_inst *emit(enum opcode opcode);
fs_inst *emit(enum opcode opcode, fs_reg dst);
fs_inst *emit(enum opcode opcode, fs_reg dst, fs_reg src0);
fs_inst *emit(enum opcode opcode, fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *emit(enum opcode opcode, fs_reg dst,
fs_reg src0, fs_reg src1, fs_reg src2);
fs_inst *MOV(fs_reg dst, fs_reg src);
fs_inst *NOT(fs_reg dst, fs_reg src);
fs_inst *RNDD(fs_reg dst, fs_reg src);
fs_inst *RNDE(fs_reg dst, fs_reg src);
fs_inst *RNDZ(fs_reg dst, fs_reg src);
fs_inst *FRC(fs_reg dst, fs_reg src);
fs_inst *ADD(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *MUL(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *MACH(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *MAC(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *SHL(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *SHR(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *ASR(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *AND(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *OR(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *XOR(fs_reg dst, fs_reg src0, fs_reg src1);
fs_inst *IF(uint32_t predicate);
fs_inst *IF(fs_reg src0, fs_reg src1, uint32_t condition);
fs_inst *CMP(fs_reg dst, fs_reg src0, fs_reg src1,
uint32_t condition);
fs_inst *LRP(fs_reg dst, fs_reg a, fs_reg y, fs_reg x);
fs_inst *DEP_RESOLVE_MOV(int grf);
fs_inst *BFREV(fs_reg dst, fs_reg value);
fs_inst *BFE(fs_reg dst, fs_reg bits, fs_reg offset, fs_reg value);
fs_inst *BFI1(fs_reg dst, fs_reg bits, fs_reg offset);
fs_inst *BFI2(fs_reg dst, fs_reg bfi1_dst, fs_reg insert, fs_reg base);
fs_inst *FBH(fs_reg dst, fs_reg value);
fs_inst *FBL(fs_reg dst, fs_reg value);
fs_inst *CBIT(fs_reg dst, fs_reg value);
int type_size(const struct glsl_type *type);
fs_inst *get_instruction_generating_reg(fs_inst *start,
fs_inst *end,
fs_reg reg);
exec_list VARYING_PULL_CONSTANT_LOAD(fs_reg dst, fs_reg surf_index,
fs_reg varying_offset,
uint32_t const_offset);
bool run();
void setup_payload_gen4();
void setup_payload_gen6();
void assign_curb_setup();
void calculate_urb_setup();
void assign_urb_setup();
bool assign_regs();
void assign_regs_trivial();
void setup_payload_interference(struct ra_graph *g, int payload_reg_count,
int first_payload_node);
void setup_mrf_hack_interference(struct ra_graph *g,
int first_mrf_hack_node);
int choose_spill_reg(struct ra_graph *g);
void spill_reg(int spill_reg);
void split_virtual_grfs();
void compact_virtual_grfs();
void move_uniform_array_access_to_pull_constants();
void setup_pull_constants();
void calculate_live_intervals();
bool opt_algebraic();
bool opt_cse();
bool opt_cse_local(bblock_t *block, exec_list *aeb);
bool opt_copy_propagate();
bool try_copy_propagate(fs_inst *inst, int arg, acp_entry *entry);
bool try_constant_propagate(fs_inst *inst, acp_entry *entry);
bool opt_copy_propagate_local(void *mem_ctx, bblock_t *block,
exec_list *acp);
bool register_coalesce();
bool register_coalesce_2();
bool compute_to_mrf();
bool dead_code_eliminate();
bool dead_code_eliminate_local();
bool remove_dead_constants();
bool remove_duplicate_mrf_writes();
bool virtual_grf_interferes(int a, int b);
void schedule_instructions(bool post_reg_alloc);
void insert_gen4_send_dependency_workarounds();
void insert_gen4_pre_send_dependency_workarounds(fs_inst *inst);
void insert_gen4_post_send_dependency_workarounds(fs_inst *inst);
void fail(const char *msg, ...);
void lower_uniform_pull_constant_loads();
void push_force_uncompressed();
void pop_force_uncompressed();
void push_force_sechalf();
void pop_force_sechalf();
void emit_dummy_fs();
fs_reg *emit_fragcoord_interpolation(ir_variable *ir);
fs_inst *emit_linterp(const fs_reg &attr, const fs_reg &interp,
glsl_interp_qualifier interpolation_mode,
bool is_centroid);
fs_reg *emit_frontfacing_interpolation(ir_variable *ir);
fs_reg *emit_general_interpolation(ir_variable *ir);
void emit_interpolation_setup_gen4();
void emit_interpolation_setup_gen6();
fs_reg rescale_texcoord(ir_texture *ir, fs_reg coordinate,
bool is_rect, int sampler, int texunit);
fs_inst *emit_texture_gen4(ir_texture *ir, fs_reg dst, fs_reg coordinate,
fs_reg shadow_comp, fs_reg lod, fs_reg lod2);
fs_inst *emit_texture_gen5(ir_texture *ir, fs_reg dst, fs_reg coordinate,
fs_reg shadow_comp, fs_reg lod, fs_reg lod2,
fs_reg sample_index);
fs_inst *emit_texture_gen7(ir_texture *ir, fs_reg dst, fs_reg coordinate,
fs_reg shadow_comp, fs_reg lod, fs_reg lod2,
fs_reg sample_index);
fs_reg fix_math_operand(fs_reg src);
fs_inst *emit_math(enum opcode op, fs_reg dst, fs_reg src0);
fs_inst *emit_math(enum opcode op, fs_reg dst, fs_reg src0, fs_reg src1);
void emit_lrp(fs_reg dst, fs_reg x, fs_reg y, fs_reg a);
void emit_minmax(uint32_t conditionalmod, fs_reg dst,
fs_reg src0, fs_reg src1);
bool try_emit_saturate(ir_expression *ir);
bool try_emit_mad(ir_expression *ir, int mul_arg);
void emit_bool_to_cond_code(ir_rvalue *condition);
void emit_if_gen6(ir_if *ir);
void emit_unspill(fs_inst *inst, fs_reg reg, uint32_t spill_offset);
void emit_fragment_program_code();
void setup_fp_regs();
fs_reg get_fp_src_reg(const prog_src_register *src);
fs_reg get_fp_dst_reg(const prog_dst_register *dst);
void emit_fp_alu1(enum opcode opcode,
const struct prog_instruction *fpi,
fs_reg dst, fs_reg src);
void emit_fp_alu2(enum opcode opcode,
const struct prog_instruction *fpi,
fs_reg dst, fs_reg src0, fs_reg src1);
void emit_fp_scalar_write(const struct prog_instruction *fpi,
fs_reg dst, fs_reg src);
void emit_fp_scalar_math(enum opcode opcode,
const struct prog_instruction *fpi,
fs_reg dst, fs_reg src);
void emit_fp_minmax(const struct prog_instruction *fpi,
fs_reg dst, fs_reg src0, fs_reg src1);
void emit_fp_sop(uint32_t conditional_mod,
const struct prog_instruction *fpi,
fs_reg dst, fs_reg src0, fs_reg src1, fs_reg one);
void emit_color_write(int target, int index, int first_color_mrf);
void emit_fb_writes();
void emit_shader_time_begin();
void emit_shader_time_end();
void emit_shader_time_write(enum shader_time_shader_type type,
fs_reg value);
bool try_rewrite_rhs_to_dst(ir_assignment *ir,
fs_reg dst,
fs_reg src,
fs_inst *pre_rhs_inst,
fs_inst *last_rhs_inst);
void emit_assignment_writes(fs_reg &l, fs_reg &r,
const glsl_type *type, bool predicated);
void resolve_ud_negate(fs_reg *reg);
void resolve_bool_comparison(ir_rvalue *rvalue, fs_reg *reg);
fs_reg get_timestamp();
struct brw_reg interp_reg(int location, int channel);
void setup_uniform_values(ir_variable *ir);
void setup_builtin_uniform_values(ir_variable *ir);
int implied_mrf_writes(fs_inst *inst);
void dump_instruction(backend_instruction *inst);
struct gl_fragment_program *fp;
struct brw_wm_compile *c;
unsigned int sanity_param_count;
int param_size[MAX_UNIFORMS * 4];
int *virtual_grf_sizes;
int virtual_grf_count;
int virtual_grf_array_size;
int *virtual_grf_start;
int *virtual_grf_end;
bool live_intervals_valid;
/* This is the map from UNIFORM hw_reg + reg_offset as generated by
* the visitor to the packed uniform number after
* remove_dead_constants() that represents the actual uploaded
* uniform index.
*/
int *params_remap;
int nr_params_remap;
struct hash_table *variable_ht;
fs_reg frag_depth;
fs_reg outputs[BRW_MAX_DRAW_BUFFERS];
unsigned output_components[BRW_MAX_DRAW_BUFFERS];
fs_reg dual_src_output;
int first_non_payload_grf;
/** Either BRW_MAX_GRF or GEN7_MRF_HACK_START */
int max_grf;
int urb_setup[VARYING_SLOT_MAX];
fs_reg *fp_temp_regs;
fs_reg *fp_input_regs;
/** @{ debug annotation info */
const char *current_annotation;
const void *base_ir;
/** @} */
bool failed;
char *fail_msg;
/* Result of last visit() method. */
fs_reg result;
fs_reg pixel_x;
fs_reg pixel_y;
fs_reg wpos_w;
fs_reg pixel_w;
fs_reg delta_x[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT];
fs_reg delta_y[BRW_WM_BARYCENTRIC_INTERP_MODE_COUNT];
fs_reg shader_start_time;
int grf_used;
const unsigned dispatch_width; /**< 8 or 16 */
int force_uncompressed_stack;
int force_sechalf_stack;
};
/**
* The fragment shader code generator.
*
* Translates FS IR to actual i965 assembly code.
*/
class fs_generator
{
public:
fs_generator(struct brw_context *brw,
struct brw_wm_compile *c,
struct gl_shader_program *prog,
struct gl_fragment_program *fp,
bool dual_source_output);
~fs_generator();
const unsigned *generate_assembly(exec_list *simd8_instructions,
exec_list *simd16_instructions,
unsigned *assembly_size);
private:
void generate_code(exec_list *instructions);
void generate_fb_write(fs_inst *inst);
void generate_pixel_xy(struct brw_reg dst, bool is_x);
void generate_linterp(fs_inst *inst, struct brw_reg dst,
struct brw_reg *src);
void generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src);
void generate_math1_gen7(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src);
void generate_math2_gen7(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src0,
struct brw_reg src1);
void generate_math1_gen6(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src);
void generate_math2_gen6(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src0,
struct brw_reg src1);
void generate_math_gen4(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src);
void generate_math_g45(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src);
void generate_ddx(fs_inst *inst, struct brw_reg dst, struct brw_reg src);
void generate_ddy(fs_inst *inst, struct brw_reg dst, struct brw_reg src,
bool negate_value);
void generate_spill(fs_inst *inst, struct brw_reg src);
void generate_unspill(fs_inst *inst, struct brw_reg dst);
void generate_uniform_pull_constant_load(fs_inst *inst, struct brw_reg dst,
struct brw_reg index,
struct brw_reg offset);
void generate_uniform_pull_constant_load_gen7(fs_inst *inst,
struct brw_reg dst,
struct brw_reg surf_index,
struct brw_reg offset);
void generate_varying_pull_constant_load(fs_inst *inst, struct brw_reg dst,
struct brw_reg index,
struct brw_reg offset);
void generate_varying_pull_constant_load_gen7(fs_inst *inst,
struct brw_reg dst,
struct brw_reg index,
struct brw_reg offset);
void generate_mov_dispatch_to_flags(fs_inst *inst);
void generate_set_simd4x2_offset(fs_inst *inst,
struct brw_reg dst,
struct brw_reg offset);
void generate_discard_jump(fs_inst *inst);
void generate_pack_half_2x16_split(fs_inst *inst,
struct brw_reg dst,
struct brw_reg x,
struct brw_reg y);
void generate_unpack_half_2x16_split(fs_inst *inst,
struct brw_reg dst,
struct brw_reg src);
void generate_shader_time_add(fs_inst *inst,
struct brw_reg payload,
struct brw_reg offset,
struct brw_reg value);
void patch_discard_jumps_to_fb_writes();
struct brw_context *brw;
struct gl_context *ctx;
struct brw_compile *p;
struct brw_wm_compile *c;
struct gl_shader_program *prog;
struct gl_shader *shader;
const struct gl_fragment_program *fp;
unsigned dispatch_width; /**< 8 or 16 */
exec_list discard_halt_patches;
bool dual_source_output;
void *mem_ctx;
};
bool brw_do_channel_expressions(struct exec_list *instructions);
bool brw_do_vector_splitting(struct exec_list *instructions);
bool brw_fs_precompile(struct gl_context *ctx, struct gl_shader_program *prog);