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/*
* Copyright (C) 2020 Collabora, Ltd.
*
* 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 __PAN_IR_H
#define __PAN_IR_H
#include <stdint.h>
#include "panfrost-job.h"
#include "compiler/nir/nir.h"
#include "util/u_dynarray.h"
#include "util/hash_table.h"
/* Define the general compiler entry point */
#define MAX_SYSVAL_COUNT 32
/* Allow 2D of sysval IDs, while allowing nonparametric sysvals to equal
* their class for equal comparison */
#define PAN_SYSVAL(type, no) (((no) << 16) | PAN_SYSVAL_##type)
#define PAN_SYSVAL_TYPE(sysval) ((sysval) & 0xffff)
#define PAN_SYSVAL_ID(sysval) ((sysval) >> 16)
/* Define some common types. We start at one for easy indexing of hash
* tables internal to the compiler */
enum {
PAN_SYSVAL_VIEWPORT_SCALE = 1,
PAN_SYSVAL_VIEWPORT_OFFSET = 2,
PAN_SYSVAL_TEXTURE_SIZE = 3,
PAN_SYSVAL_SSBO = 4,
PAN_SYSVAL_NUM_WORK_GROUPS = 5,
PAN_SYSVAL_SAMPLER = 7,
};
#define PAN_TXS_SYSVAL_ID(texidx, dim, is_array) \
((texidx) | ((dim) << 7) | ((is_array) ? (1 << 9) : 0))
#define PAN_SYSVAL_ID_TO_TXS_TEX_IDX(id) ((id) & 0x7f)
#define PAN_SYSVAL_ID_TO_TXS_DIM(id) (((id) >> 7) & 0x3)
#define PAN_SYSVAL_ID_TO_TXS_IS_ARRAY(id) !!((id) & (1 << 9))
/* Special attribute slots for vertex builtins. Sort of arbitrary but let's be
* consistent with the blob so we can compare traces easier. */
enum {
PAN_VERTEX_ID = 16,
PAN_INSTANCE_ID = 17,
PAN_MAX_ATTRIBUTE
};
struct panfrost_sysvals {
/* The mapping of sysvals to uniforms, the count, and the off-by-one inverse */
unsigned sysvals[MAX_SYSVAL_COUNT];
unsigned sysval_count;
struct hash_table_u64 *sysval_to_id;
};
void
panfrost_nir_assign_sysvals(struct panfrost_sysvals *ctx, nir_shader *shader);
int
panfrost_sysval_for_instr(nir_instr *instr, nir_dest *dest);
typedef struct {
int work_register_count;
int uniform_cutoff;
/* For Bifrost - output type for each RT */
nir_alu_type blend_types[BIFROST_MAX_RENDER_TARGET_COUNT];
/* Prepended before uniforms, mapping to SYSVAL_ names for the
* sysval */
unsigned sysval_count;
unsigned sysvals[MAX_SYSVAL_COUNT];
/* Boolean properties of the program */
bool writes_point_size;
int first_tag;
struct util_dynarray compiled;
/* For a blend shader using a constant color -- patch point. If
* negative, there's no constant. */
int blend_patch_offset;
/* The number of bytes to allocate per-thread for Thread Local Storage
* (register spilling), or zero if no spilling is used */
unsigned tls_size;
/* IN: For a fragment shader with a lowered alpha test, the ref value */
float alpha_ref;
} panfrost_program;
typedef struct pan_block {
/* Link to next block. Must be first for mir_get_block */
struct list_head link;
/* List of instructions emitted for the current block */
struct list_head instructions;
/* Index of the block in source order */
unsigned name;
/* Control flow graph */
struct pan_block *successors[2];
struct set *predecessors;
/* In liveness analysis, these are live masks (per-component) for
* indices for the block. Scalar compilers have the luxury of using
* simple bit fields, but for us, liveness is a vector idea. */
uint16_t *live_in;
uint16_t *live_out;
} pan_block;
struct pan_instruction {
struct list_head link;
};
#define pan_foreach_instr_in_block_rev(block, v) \
list_for_each_entry_rev(struct pan_instruction, v, &block->instructions, link)
#define pan_foreach_successor(blk, v) \
pan_block *v; \
pan_block **_v; \
for (_v = (pan_block **) &blk->successors[0], \
v = *_v; \
v != NULL && _v < (pan_block **) &blk->successors[2]; \
_v++, v = *_v) \
#define pan_foreach_predecessor(blk, v) \
struct set_entry *_entry_##v; \
struct pan_block *v; \
for (_entry_##v = _mesa_set_next_entry(blk->predecessors, NULL), \
v = (struct pan_block *) (_entry_##v ? _entry_##v->key : NULL); \
_entry_##v != NULL; \
_entry_##v = _mesa_set_next_entry(blk->predecessors, _entry_##v), \
v = (struct pan_block *) (_entry_##v ? _entry_##v->key : NULL))
static inline pan_block *
pan_exit_block(struct list_head *blocks)
{
pan_block *last = list_last_entry(blocks, pan_block, link);
assert(!last->successors[0] && !last->successors[1]);
return last;
}
typedef void (*pan_liveness_update)(uint16_t *, void *, unsigned max);
void pan_liveness_gen(uint16_t *live, unsigned node, unsigned max, uint16_t mask);
void pan_liveness_kill(uint16_t *live, unsigned node, unsigned max, uint16_t mask);
bool pan_liveness_get(uint16_t *live, unsigned node, uint16_t max);
void pan_compute_liveness(struct list_head *blocks,
unsigned temp_count,
pan_liveness_update callback);
void pan_free_liveness(struct list_head *blocks);
uint16_t
pan_to_bytemask(unsigned bytes, unsigned mask);
void pan_block_add_successor(pan_block *block, pan_block *successor);
/* IR indexing */
#define PAN_IS_REG (1)
static inline unsigned
pan_ssa_index(nir_ssa_def *ssa)
{
/* Off-by-one ensures BIR_NO_ARG is skipped */
return ((ssa->index + 1) << 1) | 0;
}
static inline unsigned
pan_src_index(nir_src *src)
{
if (src->is_ssa)
return pan_ssa_index(src->ssa);
else {
assert(!src->reg.indirect);
return (src->reg.reg->index << 1) | PAN_IS_REG;
}
}
static inline unsigned
pan_dest_index(nir_dest *dst)
{
if (dst->is_ssa)
return pan_ssa_index(&dst->ssa);
else {
assert(!dst->reg.indirect);
return (dst->reg.reg->index << 1) | PAN_IS_REG;
}
}
/* IR printing helpers */
void pan_print_alu_type(nir_alu_type t, FILE *fp);
#endif
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