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/*
* 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.
*/
#include <stdint.h>
#include "brw_reg.h"
#include "brw_defines.h"
#include "main/compiler.h"
#include "glsl/ir.h"
#ifdef __cplusplus
#include "brw_ir_allocator.h"
#endif
#pragma once
#define MAX_SAMPLER_MESSAGE_SIZE 11
#define MAX_VGRF_SIZE 16
enum PACKED register_file {
BAD_FILE,
GRF,
MRF,
IMM,
HW_REG, /* a struct brw_reg */
ATTR,
UNIFORM, /* prog_data->params[reg] */
};
struct backend_reg
{
#ifdef __cplusplus
bool is_zero() const;
bool is_one() const;
bool is_negative_one() const;
bool is_null() const;
bool is_accumulator() const;
bool in_range(const backend_reg &r, unsigned n) const;
#endif
enum register_file file; /**< Register file: GRF, MRF, IMM. */
enum brw_reg_type type; /**< Register type: BRW_REGISTER_TYPE_* */
/**
* Register number.
*
* For GRF, it's a virtual register number until register allocation.
*
* For MRF, it's the hardware register.
*/
uint16_t reg;
/**
* Offset within the virtual register.
*
* In the scalar backend, this is in units of a float per pixel for pre-
* register allocation registers (i.e., one register in SIMD8 mode and two
* registers in SIMD16 mode).
*
* For uniforms, this is in units of 1 float.
*/
uint16_t reg_offset;
struct brw_reg fixed_hw_reg;
bool negate;
bool abs;
};
struct cfg_t;
struct bblock_t;
#ifdef __cplusplus
struct backend_instruction : public exec_node {
bool is_3src() const;
bool is_tex() const;
bool is_math() const;
bool is_control_flow() const;
bool is_commutative() const;
bool can_do_source_mods() const;
bool can_do_saturate() const;
bool can_do_cmod() const;
bool reads_accumulator_implicitly() const;
bool writes_accumulator_implicitly(struct brw_context *brw) const;
void remove(bblock_t *block);
void insert_after(bblock_t *block, backend_instruction *inst);
void insert_before(bblock_t *block, backend_instruction *inst);
void insert_before(bblock_t *block, exec_list *list);
/**
* True if the instruction has side effects other than writing to
* its destination registers. You are expected not to reorder or
* optimize these out unless you know what you are doing.
*/
bool has_side_effects() const;
#else
struct backend_instruction {
struct exec_node link;
#endif
/** @{
* Annotation for the generated IR. One of the two can be set.
*/
const void *ir;
const char *annotation;
/** @} */
uint32_t offset; /**< spill/unspill offset or texture offset bitfield */
uint8_t mlen; /**< SEND message length */
int8_t base_mrf; /**< First MRF in the SEND message, if mlen is nonzero. */
uint8_t target; /**< MRT target. */
uint8_t regs_written; /**< Number of registers written by the instruction. */
enum opcode opcode; /* BRW_OPCODE_* or FS_OPCODE_* */
enum brw_conditional_mod conditional_mod; /**< BRW_CONDITIONAL_* */
enum brw_predicate predicate;
bool predicate_inverse:1;
bool writes_accumulator:1; /**< instruction implicitly writes accumulator */
bool force_writemask_all:1;
bool no_dd_clear:1;
bool no_dd_check:1;
bool saturate:1;
bool shadow_compare:1;
bool header_present:1;
/* Chooses which flag subregister (f0.0 or f0.1) is used for conditional
* mod and predication.
*/
unsigned flag_subreg:1;
};
#ifdef __cplusplus
enum instruction_scheduler_mode {
SCHEDULE_PRE,
SCHEDULE_PRE_NON_LIFO,
SCHEDULE_PRE_LIFO,
SCHEDULE_POST,
};
class backend_visitor : public ir_visitor {
protected:
backend_visitor(struct brw_context *brw,
struct gl_shader_program *shader_prog,
struct gl_program *prog,
struct brw_stage_prog_data *stage_prog_data,
gl_shader_stage stage);
public:
struct brw_context * const brw;
const struct brw_device_info * const devinfo;
struct gl_context * const ctx;
struct brw_shader * const shader;
struct gl_shader_program * const shader_prog;
struct gl_program * const prog;
struct brw_stage_prog_data * const stage_prog_data;
/** ralloc context for temporary data used during compile */
void *mem_ctx;
/**
* List of either fs_inst or vec4_instruction (inheriting from
* backend_instruction)
*/
exec_list instructions;
cfg_t *cfg;
gl_shader_stage stage;
bool debug_enabled;
const char *stage_name;
const char *stage_abbrev;
brw::simple_allocator alloc;
virtual void dump_instruction(backend_instruction *inst) = 0;
virtual void dump_instruction(backend_instruction *inst, FILE *file) = 0;
virtual void dump_instructions();
virtual void dump_instructions(const char *name);
void calculate_cfg();
void invalidate_cfg();
void assign_common_binding_table_offsets(uint32_t next_binding_table_offset);
virtual void invalidate_live_intervals() = 0;
};
uint32_t brw_texture_offset(int *offsets, unsigned num_components);
#endif /* __cplusplus */
enum brw_reg_type brw_type_for_base_type(const struct glsl_type *type);
enum brw_conditional_mod brw_conditional_for_comparison(unsigned int op);
uint32_t brw_math_function(enum opcode op);
const char *brw_instruction_name(enum opcode op);
bool brw_saturate_immediate(enum brw_reg_type type, struct brw_reg *reg);
bool brw_negate_immediate(enum brw_reg_type type, struct brw_reg *reg);
bool brw_abs_immediate(enum brw_reg_type type, struct brw_reg *reg);
#ifdef __cplusplus
extern "C" {
#endif
bool brw_vs_precompile(struct gl_context *ctx,
struct gl_shader_program *shader_prog,
struct gl_program *prog);
bool brw_gs_precompile(struct gl_context *ctx,
struct gl_shader_program *shader_prog,
struct gl_program *prog);
bool brw_fs_precompile(struct gl_context *ctx,
struct gl_shader_program *shader_prog,
struct gl_program *prog);
#ifdef __cplusplus
}
#endif
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