xref: /xsrc/external/mit/MesaLib/dist/src/freedreno/ir3/ir3.h

/*
 * Copyright (c) 2013 Rob Clark <robdclark@gmail.com>
 *
 * 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 IR3_H_
#define IR3_H_

#include <stdbool.h>
#include <stdint.h>

#include "compiler/shader_enums.h"

#include "util/bitscan.h"
#include "util/list.h"
#include "util/set.h"
#include "util/u_debug.h"

#include "instr-a3xx.h"

/* low level intermediate representation of an adreno shader program */

struct ir3_compiler;
struct ir3;
struct ir3_instruction;
struct ir3_block;

struct ir3_info {
   void *data; /* used internally in ir3 assembler */
   /* Size in bytes of the shader binary, including NIR constants and
    * padding
    */
   uint32_t size;
   /* byte offset from start of the shader to the NIR constant data. */
   uint32_t constant_data_offset;
   /* Size in dwords of the instructions. */
   uint16_t sizedwords;
   uint16_t instrs_count; /* expanded to account for rpt's */
   uint16_t nops_count;   /* # of nop instructions, including nopN */
   uint16_t mov_count;
   uint16_t cov_count;
   uint16_t stp_count;
   uint16_t ldp_count;
   /* NOTE: max_reg, etc, does not include registers not touched
    * by the shader (ie. vertex fetched via VFD_DECODE but not
    * touched by shader)
    */
   int8_t max_reg; /* highest GPR # used by shader */
   int8_t max_half_reg;
   int16_t max_const;
   /* This is the maximum # of waves that can executed at once in one core,
    * assuming that they are all executing this shader.
    */
   int8_t max_waves;
   bool double_threadsize;
   bool multi_dword_ldp_stp;

   /* number of sync bits: */
   uint16_t ss, sy;

   /* estimate of number of cycles stalled on (ss) */
   uint16_t sstall;

   uint16_t last_baryf; /* instruction # of last varying fetch */

   /* Number of instructions of a given category: */
   uint16_t instrs_per_cat[8];
};

struct ir3_merge_set {
   uint16_t preferred_reg;
   uint16_t size;
   uint16_t alignment;

   unsigned interval_start;
   unsigned spill_slot;

   unsigned regs_count;
   struct ir3_register **regs;
};

struct ir3_register {
   enum {
      IR3_REG_CONST = 0x001,
      IR3_REG_IMMED = 0x002,
      IR3_REG_HALF = 0x004,
      /* Shared registers have the same value for all threads when read.
       * They can only be written when one thread is active (that is, inside
       * a "getone" block).
       */
      IR3_REG_SHARED = 0x008,
      IR3_REG_RELATIV = 0x010,
      IR3_REG_R = 0x020,
      /* Most instructions, it seems, can do float abs/neg but not
       * integer.  The CP pass needs to know what is intended (int or
       * float) in order to do the right thing.  For this reason the
       * abs/neg flags are split out into float and int variants.  In
       * addition, .b (bitwise) operations, the negate is actually a
       * bitwise not, so split that out into a new flag to make it
       * more clear.
       */
      IR3_REG_FNEG = 0x040,
      IR3_REG_FABS = 0x080,
      IR3_REG_SNEG = 0x100,
      IR3_REG_SABS = 0x200,
      IR3_REG_BNOT = 0x400,
      /* (ei) flag, end-input?  Set on last bary, presumably to signal
       * that the shader needs no more input:
       */
      IR3_REG_EI = 0x2000,
      /* meta-flags, for intermediate stages of IR, ie.
       * before register assignment is done:
       */
      IR3_REG_SSA = 0x4000, /* 'def' is ptr to assigning destination */
      IR3_REG_ARRAY = 0x8000,

      /* Set on a use whenever the SSA value becomes dead after the current
       * instruction.
       */
      IR3_REG_KILL = 0x10000,

      /* Similar to IR3_REG_KILL, except that if there are multiple uses of the
       * same SSA value in a single instruction, this is only set on the first
       * use.
       */
      IR3_REG_FIRST_KILL = 0x20000,

      /* Set when a destination doesn't have any uses and is dead immediately
       * after the instruction. This can happen even after optimizations for
       * corner cases such as destinations of atomic instructions.
       */
      IR3_REG_UNUSED = 0x40000,
   } flags;

   unsigned name;

   /* used for cat5 instructions, but also for internal/IR level
    * tracking of what registers are read/written by an instruction.
    * wrmask may be a bad name since it is used to represent both
    * src and dst that touch multiple adjacent registers.
    */
   unsigned wrmask : 16; /* up to vec16 */

   /* for relative addressing, 32bits for array size is too small,
    * but otoh we don't need to deal with disjoint sets, so instead
    * use a simple size field (number of scalar components).
    *
    * Note the size field isn't important for relative const (since
    * we don't have to do register allocation for constants).
    */
   unsigned size : 16;

   /* normal registers:
    * the component is in the low two bits of the reg #, so
    * rN.x becomes: (N << 2) | x
    */
   uint16_t num;
   union {
      /* immediate: */
      int32_t iim_val;
      uint32_t uim_val;
      float fim_val;
      /* relative: */
      struct {
         uint16_t id;
         int16_t offset;
         uint16_t base;
      } array;
   };

   /* For IR3_REG_DEST, pointer back to the instruction containing this
    * register.
    */
   struct ir3_instruction *instr;

   /* For IR3_REG_SSA, src registers contain ptr back to assigning
    * instruction.
    *
    * For IR3_REG_ARRAY, the pointer is back to the last dependent
    * array access (although the net effect is the same, it points
    * back to a previous instruction that we depend on).
    */
   struct ir3_register *def;

   /* Pointer to another register in the instruction that must share the same
    * physical register. Each destination can be tied with one source, and
    * they must have "tied" pointing to each other.
    */
   struct ir3_register *tied;

   unsigned spill_slot, next_use;

   unsigned merge_set_offset;
   struct ir3_merge_set *merge_set;
   unsigned interval_start, interval_end;
};

/*
 * Stupid/simple growable array implementation:
 */
#define DECLARE_ARRAY(type, name)                                              \
   unsigned name##_count, name##_sz;                                           \
   type *name;

#define array_insert(ctx, arr, ...)                                            \
   do {                                                                        \
      if (arr##_count == arr##_sz) {                                           \
         arr##_sz = MAX2(2 * arr##_sz, 16);                                    \
         arr = reralloc_size(ctx, arr, arr##_sz * sizeof(arr[0]));             \
      }                                                                        \
      arr[arr##_count++] = __VA_ARGS__;                                        \
   } while (0)

struct ir3_instruction {
   struct ir3_block *block;
   opc_t opc;
   enum {
      /* (sy) flag is set on first instruction, and after sample
       * instructions (probably just on RAW hazard).
       */
      IR3_INSTR_SY = 0x001,
      /* (ss) flag is set on first instruction, and first instruction
       * to depend on the result of "long" instructions (RAW hazard):
       *
       *   rcp, rsq, log2, exp2, sin, cos, sqrt
       *
       * It seems to synchronize until all in-flight instructions are
       * completed, for example:
       *
       *   rsq hr1.w, hr1.w
       *   add.f hr2.z, (neg)hr2.z, hc0.y
       *   mul.f hr2.w, (neg)hr2.y, (neg)hr2.y
       *   rsq hr2.x, hr2.x
       *   (rpt1)nop
       *   mad.f16 hr2.w, hr2.z, hr2.z, hr2.w
       *   nop
       *   mad.f16 hr2.w, (neg)hr0.w, (neg)hr0.w, hr2.w
       *   (ss)(rpt2)mul.f hr1.x, (r)hr1.x, hr1.w
       *   (rpt2)mul.f hr0.x, (neg)(r)hr0.x, hr2.x
       *
       * The last mul.f does not have (ss) set, presumably because the
       * (ss) on the previous instruction does the job.
       *
       * The blob driver also seems to set it on WAR hazards, although
       * not really clear if this is needed or just blob compiler being
       * sloppy.  So far I haven't found a case where removing the (ss)
       * causes problems for WAR hazard, but I could just be getting
       * lucky:
       *
       *   rcp r1.y, r3.y
       *   (ss)(rpt2)mad.f32 r3.y, (r)c9.x, r1.x, (r)r3.z
       *
       */
      IR3_INSTR_SS = 0x002,
      /* (jp) flag is set on jump targets:
       */
      IR3_INSTR_JP = 0x004,
      IR3_INSTR_UL = 0x008,
      IR3_INSTR_3D = 0x010,
      IR3_INSTR_A = 0x020,
      IR3_INSTR_O = 0x040,
      IR3_INSTR_P = 0x080,
      IR3_INSTR_S = 0x100,
      IR3_INSTR_S2EN = 0x200,
      IR3_INSTR_G = 0x400,
      IR3_INSTR_SAT = 0x800,
      /* (cat5/cat6) Bindless */
      IR3_INSTR_B = 0x1000,
      /* (cat5/cat6) nonuniform */
      IR3_INSTR_NONUNIF = 0x02000,
      /* (cat5-only) Get some parts of the encoding from a1.x */
      IR3_INSTR_A1EN = 0x04000,
      /* meta-flags, for intermediate stages of IR, ie.
       * before register assignment is done:
       */
      IR3_INSTR_MARK = 0x08000,
      IR3_INSTR_UNUSED = 0x10000,
   } flags;
   uint8_t repeat;
   uint8_t nop;
#ifdef DEBUG
   unsigned srcs_max, dsts_max;
#endif
   unsigned srcs_count, dsts_count;
   struct ir3_register **dsts;
   struct ir3_register **srcs;
   union {
      struct {
         char inv1, inv2;
         char comp1, comp2;
         int immed;
         struct ir3_block *target;
         const char *target_label;
         brtype_t brtype;
         unsigned idx; /* for brac.N */
      } cat0;
      struct {
         type_t src_type, dst_type;
         round_t round;
      } cat1;
      struct {
         enum {
            IR3_COND_LT = 0,
            IR3_COND_LE = 1,
            IR3_COND_GT = 2,
            IR3_COND_GE = 3,
            IR3_COND_EQ = 4,
            IR3_COND_NE = 5,
         } condition;
      } cat2;
      struct {
         unsigned samp, tex;
         unsigned tex_base : 3;
         type_t type;
      } cat5;
      struct {
         type_t type;
         /* TODO remove dst_offset and handle as a ir3_register
          * which might be IMMED, similar to how src_offset is
          * handled.
          */
         int dst_offset;
         int iim_val   : 3; /* for ldgb/stgb, # of components */
         unsigned d    : 3; /* for ldc, component offset */
         bool typed    : 1;
         unsigned base : 3;
      } cat6;
      struct {
         unsigned w : 1; /* write */
         unsigned r : 1; /* read */
         unsigned l : 1; /* local */
         unsigned g : 1; /* global */
      } cat7;
      /* for meta-instructions, just used to hold extra data
       * before instruction scheduling, etc
       */
      struct {
         int off; /* component/offset */
      } split;
      struct {
         /* Per-source index back to the entry in the
          * ir3_shader_variant::outputs table.
          */
         unsigned *outidxs;
      } end;
      struct {
         /* used to temporarily hold reference to nir_phi_instr
          * until we resolve the phi srcs
          */
         void *nphi;
      } phi;
      struct {
         unsigned samp, tex;
         unsigned input_offset;
         unsigned samp_base : 3;
         unsigned tex_base  : 3;
      } prefetch;
      struct {
         /* maps back to entry in ir3_shader_variant::inputs table: */
         int inidx;
         /* for sysvals, identifies the sysval type.  Mostly so we can
          * identify the special cases where a sysval should not be DCE'd
          * (currently, just pre-fs texture fetch)
          */
         gl_system_value sysval;
      } input;
   };

   /* For assigning jump offsets, we need instruction's position: */
   uint32_t ip;

   /* used for per-pass extra instruction data.
    *
    * TODO we should remove the per-pass data like this and 'use_count'
    * and do something similar to what RA does w/ ir3_ra_instr_data..
    * ie. use the ir3_count_instructions pass, and then use instr->ip
    * to index into a table of pass-private data.
    */
   void *data;

   /**
    * Valid if pass calls ir3_find_ssa_uses().. see foreach_ssa_use()
    */
   struct set *uses;

   int use_count; /* currently just updated/used by cp */

   /* an instruction can reference at most one address register amongst
    * it's src/dst registers.  Beyond that, you need to insert mov's.
    *
    * NOTE: do not write this directly, use ir3_instr_set_address()
    */
   struct ir3_register *address;

   /* Tracking for additional dependent instructions.  Used to handle
    * barriers, WAR hazards for arrays/SSBOs/etc.
    */
   DECLARE_ARRAY(struct ir3_instruction *, deps);

   /*
    * From PoV of instruction scheduling, not execution (ie. ignores global/
    * local distinction):
    *                            shared  image  atomic  SSBO  everything
    *   barrier()/            -   R/W     R/W    R/W     R/W       X
    *     groupMemoryBarrier()
    *     memoryBarrier()
    *     (but only images declared coherent?)
    *   memoryBarrierAtomic() -                  R/W
    *   memoryBarrierBuffer() -                          R/W
    *   memoryBarrierImage()  -           R/W
    *   memoryBarrierShared() -   R/W
    *
    * TODO I think for SSBO/image/shared, in cases where we can determine
    * which variable is accessed, we don't need to care about accesses to
    * different variables (unless declared coherent??)
    */
   enum {
      IR3_BARRIER_EVERYTHING = 1 << 0,
      IR3_BARRIER_SHARED_R = 1 << 1,
      IR3_BARRIER_SHARED_W = 1 << 2,
      IR3_BARRIER_IMAGE_R = 1 << 3,
      IR3_BARRIER_IMAGE_W = 1 << 4,
      IR3_BARRIER_BUFFER_R = 1 << 5,
      IR3_BARRIER_BUFFER_W = 1 << 6,
      IR3_BARRIER_ARRAY_R = 1 << 7,
      IR3_BARRIER_ARRAY_W = 1 << 8,
      IR3_BARRIER_PRIVATE_R = 1 << 9,
      IR3_BARRIER_PRIVATE_W = 1 << 10,
   } barrier_class,
      barrier_conflict;

   /* Entry in ir3_block's instruction list: */
   struct list_head node;

   uint32_t serialno;

   // TODO only computerator/assembler:
   int line;
};

struct ir3 {
   struct ir3_compiler *compiler;
   gl_shader_stage type;

   DECLARE_ARRAY(struct ir3_instruction *, inputs);

   /* Track bary.f (and ldlv) instructions.. this is needed in
    * scheduling to ensure that all varying fetches happen before
    * any potential kill instructions.  The hw gets grumpy if all
    * threads in a group are killed before the last bary.f gets
    * a chance to signal end of input (ei).
    */
   DECLARE_ARRAY(struct ir3_instruction *, baryfs);

   /* Track all indirect instructions (read and write).  To avoid
    * deadlock scenario where an address register gets scheduled,
    * but other dependent src instructions cannot be scheduled due
    * to dependency on a *different* address register value, the
    * scheduler needs to ensure that all dependencies other than
    * the instruction other than the address register are scheduled
    * before the one that writes the address register.  Having a
    * convenient list of instructions that reference some address
    * register simplifies this.
    */
   DECLARE_ARRAY(struct ir3_instruction *, a0_users);

   /* same for a1.x: */
   DECLARE_ARRAY(struct ir3_instruction *, a1_users);

   /* and same for instructions that consume predicate register: */
   DECLARE_ARRAY(struct ir3_instruction *, predicates);

   /* Track texture sample instructions which need texture state
    * patched in (for astc-srgb workaround):
    */
   DECLARE_ARRAY(struct ir3_instruction *, astc_srgb);

   /* List of blocks: */
   struct list_head block_list;

   /* List of ir3_array's: */
   struct list_head array_list;

#ifdef DEBUG
   unsigned block_count;
#endif
   unsigned instr_count;
};

struct ir3_array {
   struct list_head node;
   unsigned length;
   unsigned id;

   struct nir_register *r;

   /* To avoid array write's from getting DCE'd, keep track of the
    * most recent write.  Any array access depends on the most
    * recent write.  This way, nothing depends on writes after the
    * last read.  But all the writes that happen before that have
    * something depending on them
    */
   struct ir3_register *last_write;

   /* extra stuff used in RA pass: */
   unsigned base; /* base vreg name */
   unsigned reg;  /* base physical reg */
   uint16_t start_ip, end_ip;

   /* Indicates if half-precision */
   bool half;

   bool unused;
};

struct ir3_array *ir3_lookup_array(struct ir3 *ir, unsigned id);

enum ir3_branch_type {
   IR3_BRANCH_COND,   /* condition */
   IR3_BRANCH_ANY,    /* subgroupAny(condition) */
   IR3_BRANCH_ALL,    /* subgroupAll(condition) */
   IR3_BRANCH_GETONE, /* subgroupElect() */
};

struct ir3_block {
   struct list_head node;
   struct ir3 *shader;

   const struct nir_block *nblock;

   struct list_head instr_list; /* list of ir3_instruction */

   /* The actual branch condition, if there are two successors */
   enum ir3_branch_type brtype;

   /* each block has either one or two successors.. in case of two
    * successors, 'condition' decides which one to follow.  A block preceding
    * an if/else has two successors.
    *
    * In some cases the path that the machine actually takes through the
    * program may not match the per-thread view of the CFG. In particular
    * this is the case for if/else, where the machine jumps from the end of
    * the if to the beginning of the else and switches active lanes. While
    * most things only care about the per-thread view, we need to use the
    * "physical" view when allocating shared registers. "successors" contains
    * the per-thread successors, and "physical_successors" contains the
    * physical successors which includes the fallthrough edge from the if to
    * the else.
    */
   struct ir3_instruction *condition;
   struct ir3_block *successors[2];
   struct ir3_block *physical_successors[2];

   DECLARE_ARRAY(struct ir3_block *, predecessors);
   DECLARE_ARRAY(struct ir3_block *, physical_predecessors);

   uint16_t start_ip, end_ip;

   /* Track instructions which do not write a register but other-
    * wise must not be discarded (such as kill, stg, etc)
    */
   DECLARE_ARRAY(struct ir3_instruction *, keeps);

   /* used for per-pass extra block data.  Mainly used right
    * now in RA step to track livein/liveout.
    */
   void *data;

   uint32_t index;

   struct ir3_block *imm_dom;
   DECLARE_ARRAY(struct ir3_block *, dom_children);

   uint32_t dom_pre_index;
   uint32_t dom_post_index;

   uint32_t loop_id;
   uint32_t loop_depth;

#ifdef DEBUG
   uint32_t serialno;
#endif
};

static inline uint32_t
block_id(struct ir3_block *block)
{
#ifdef DEBUG
   return block->serialno;
#else
   return (uint32_t)(unsigned long)block;
#endif
}

static inline struct ir3_block *
ir3_start_block(struct ir3 *ir)
{
   return list_first_entry(&ir->block_list, struct ir3_block, node);
}

void ir3_block_add_predecessor(struct ir3_block *block, struct ir3_block *pred);
void ir3_block_add_physical_predecessor(struct ir3_block *block,
                                        struct ir3_block *pred);
void ir3_block_remove_predecessor(struct ir3_block *block,
                                  struct ir3_block *pred);
void ir3_block_remove_physical_predecessor(struct ir3_block *block,
                                           struct ir3_block *pred);
unsigned ir3_block_get_pred_index(struct ir3_block *block,
                                  struct ir3_block *pred);

void ir3_calc_dominance(struct ir3 *ir);
bool ir3_block_dominates(struct ir3_block *a, struct ir3_block *b);

struct ir3_shader_variant;

struct ir3 *ir3_create(struct ir3_compiler *compiler,
                       struct ir3_shader_variant *v);
void ir3_destroy(struct ir3 *shader);

void ir3_collect_info(struct ir3_shader_variant *v);
void *ir3_alloc(struct ir3 *shader, int sz);

unsigned ir3_get_reg_dependent_max_waves(const struct ir3_compiler *compiler,
                                         unsigned reg_count,
                                         bool double_threadsize);

unsigned ir3_get_reg_independent_max_waves(struct ir3_shader_variant *v,
                                           bool double_threadsize);

bool ir3_should_double_threadsize(struct ir3_shader_variant *v,
                                  unsigned regs_count);

struct ir3_block *ir3_block_create(struct ir3 *shader);

struct ir3_instruction *ir3_instr_create(struct ir3_block *block, opc_t opc,
                                         int ndst, int nsrc);
struct ir3_instruction *ir3_instr_clone(struct ir3_instruction *instr);
void ir3_instr_add_dep(struct ir3_instruction *instr,
                       struct ir3_instruction *dep);
const char *ir3_instr_name(struct ir3_instruction *instr);

struct ir3_register *ir3_src_create(struct ir3_instruction *instr, int num,
                                    int flags);
struct ir3_register *ir3_dst_create(struct ir3_instruction *instr, int num,
                                    int flags);
struct ir3_register *ir3_reg_clone(struct ir3 *shader,
                                   struct ir3_register *reg);

static inline void
ir3_reg_tie(struct ir3_register *dst, struct ir3_register *src)
{
   assert(!dst->tied && !src->tied);
   dst->tied = src;
   src->tied = dst;
}

void ir3_reg_set_last_array(struct ir3_instruction *instr,
                            struct ir3_register *reg,
                            struct ir3_register *last_write);

void ir3_instr_set_address(struct ir3_instruction *instr,
                           struct ir3_instruction *addr);

static inline bool
ir3_instr_check_mark(struct ir3_instruction *instr)
{
   if (instr->flags & IR3_INSTR_MARK)
      return true; /* already visited */
   instr->flags |= IR3_INSTR_MARK;
   return false;
}

void ir3_block_clear_mark(struct ir3_block *block);
void ir3_clear_mark(struct ir3 *shader);

unsigned ir3_count_instructions(struct ir3 *ir);
unsigned ir3_count_instructions_ra(struct ir3 *ir);

/**
 * Move 'instr' to just before 'after'
 */
static inline void
ir3_instr_move_before(struct ir3_instruction *instr,
                      struct ir3_instruction *after)
{
   list_delinit(&instr->node);
   list_addtail(&instr->node, &after->node);
}

/**
 * Move 'instr' to just after 'before':
 */
static inline void
ir3_instr_move_after(struct ir3_instruction *instr,
                     struct ir3_instruction *before)
{
   list_delinit(&instr->node);
   list_add(&instr->node, &before->node);
}

/**
 * Move 'instr' to the beginning of the block:
 */
static inline void
ir3_instr_move_before_block(struct ir3_instruction *instr,
                            struct ir3_block *block)
{
   list_delinit(&instr->node);
   list_add(&instr->node, &block->instr_list);
}

void ir3_find_ssa_uses(struct ir3 *ir, void *mem_ctx, bool falsedeps);

void ir3_set_dst_type(struct ir3_instruction *instr, bool half);
void ir3_fixup_src_type(struct ir3_instruction *instr);

int ir3_flut(struct ir3_register *src_reg);

bool ir3_valid_flags(struct ir3_instruction *instr, unsigned n, unsigned flags);

bool ir3_valid_immediate(struct ir3_instruction *instr, int32_t immed);

#include "util/set.h"
#define foreach_ssa_use(__use, __instr)                                        \
   for (struct ir3_instruction *__use = (void *)~0; __use && (__instr)->uses;  \
        __use = NULL)                                                          \
      set_foreach ((__instr)->uses, __entry)                                   \
         if ((__use = (void *)__entry->key))

static inline uint32_t
reg_num(const struct ir3_register *reg)
{
   return reg->num >> 2;
}

static inline uint32_t
reg_comp(const struct ir3_register *reg)
{
   return reg->num & 0x3;
}

static inline bool
is_flow(struct ir3_instruction *instr)
{
   return (opc_cat(instr->opc) == 0);
}

static inline bool
is_kill_or_demote(struct ir3_instruction *instr)
{
   return instr->opc == OPC_KILL || instr->opc == OPC_DEMOTE;
}

static inline bool
is_nop(struct ir3_instruction *instr)
{
   return instr->opc == OPC_NOP;
}

static inline bool
is_same_type_reg(struct ir3_register *dst, struct ir3_register *src)
{
   unsigned dst_type = (dst->flags & IR3_REG_HALF);
   unsigned src_type = (src->flags & IR3_REG_HALF);

   /* Treat shared->normal copies as same-type, because they can generally be
    * folded, but not normal->shared copies.
    */
   if (dst_type != src_type ||
       ((dst->flags & IR3_REG_SHARED) && !(src->flags & IR3_REG_SHARED)))
      return false;
   else
      return true;
}

/* Is it a non-transformative (ie. not type changing) mov?  This can
 * also include absneg.s/absneg.f, which for the most part can be
 * treated as a mov (single src argument).
 */
static inline bool
is_same_type_mov(struct ir3_instruction *instr)
{
   struct ir3_register *dst;

   switch (instr->opc) {
   case OPC_MOV:
      if (instr->cat1.src_type != instr->cat1.dst_type)
         return false;
      /* If the type of dest reg and src reg are different,
       * it shouldn't be considered as same type mov
       */
      if (!is_same_type_reg(instr->dsts[0], instr->srcs[0]))
         return false;
      break;
   case OPC_ABSNEG_F:
   case OPC_ABSNEG_S:
      if (instr->flags & IR3_INSTR_SAT)
         return false;
      /* If the type of dest reg and src reg are different,
       * it shouldn't be considered as same type mov
       */
      if (!is_same_type_reg(instr->dsts[0], instr->srcs[0]))
         return false;
      break;
   case OPC_META_PHI:
      return instr->srcs_count == 1;
   default:
      return false;
   }

   dst = instr->dsts[0];

   /* mov's that write to a0 or p0.x are special: */
   if (dst->num == regid(REG_P0, 0))
      return false;
   if (reg_num(dst) == REG_A0)
      return false;

   if (dst->flags & (IR3_REG_RELATIV | IR3_REG_ARRAY))
      return false;

   return true;
}

/* A move from const, which changes size but not type, can also be
 * folded into dest instruction in some cases.
 */
static inline bool
is_const_mov(struct ir3_instruction *instr)
{
   if (instr->opc != OPC_MOV)
      return false;

   if (!(instr->srcs[0]->flags & IR3_REG_CONST))
      return false;

   type_t src_type = instr->cat1.src_type;
   type_t dst_type = instr->cat1.dst_type;

   return (type_float(src_type) && type_float(dst_type)) ||
          (type_uint(src_type) && type_uint(dst_type)) ||
          (type_sint(src_type) && type_sint(dst_type));
}

static inline bool
is_alu(struct ir3_instruction *instr)
{
   return (1 <= opc_cat(instr->opc)) && (opc_cat(instr->opc) <= 3);
}

static inline bool
is_sfu(struct ir3_instruction *instr)
{
   return (opc_cat(instr->opc) == 4);
}

static inline bool
is_tex(struct ir3_instruction *instr)
{
   return (opc_cat(instr->opc) == 5);
}

static inline bool
is_tex_or_prefetch(struct ir3_instruction *instr)
{
   return is_tex(instr) || (instr->opc == OPC_META_TEX_PREFETCH);
}

static inline bool
is_mem(struct ir3_instruction *instr)
{
   return (opc_cat(instr->opc) == 6);
}

static inline bool
is_barrier(struct ir3_instruction *instr)
{
   return (opc_cat(instr->opc) == 7);
}

static inline bool
is_half(struct ir3_instruction *instr)
{
   return !!(instr->dsts[0]->flags & IR3_REG_HALF);
}

static inline bool
is_shared(struct ir3_instruction *instr)
{
   return !!(instr->dsts[0]->flags & IR3_REG_SHARED);
}

static inline bool
is_store(struct ir3_instruction *instr)
{
   /* these instructions, the "destination" register is
    * actually a source, the address to store to.
    */
   switch (instr->opc) {
   case OPC_STG:
   case OPC_STG_A:
   case OPC_STGB:
   case OPC_STIB:
   case OPC_STP:
   case OPC_STL:
   case OPC_STLW:
   case OPC_L2G:
   case OPC_G2L:
      return true;
   default:
      return false;
   }
}

static inline bool
is_load(struct ir3_instruction *instr)
{
   switch (instr->opc) {
   case OPC_LDG:
   case OPC_LDG_A:
   case OPC_LDGB:
   case OPC_LDIB:
   case OPC_LDL:
   case OPC_LDP:
   case OPC_L2G:
   case OPC_LDLW:
   case OPC_LDC:
   case OPC_LDLV:
      /* probably some others too.. */
      return true;
   default:
      return false;
   }
}

static inline bool
is_input(struct ir3_instruction *instr)
{
   /* in some cases, ldlv is used to fetch varying without
    * interpolation.. fortunately inloc is the first src
    * register in either case
    */
   switch (instr->opc) {
   case OPC_LDLV:
   case OPC_BARY_F:
      return true;
   default:
      return false;
   }
}

static inline bool
is_bool(struct ir3_instruction *instr)
{
   switch (instr->opc) {
   case OPC_CMPS_F:
   case OPC_CMPS_S:
   case OPC_CMPS_U:
      return true;
   default:
      return false;
   }
}

static inline opc_t
cat3_half_opc(opc_t opc)
{
   switch (opc) {
   case OPC_MAD_F32:
      return OPC_MAD_F16;
   case OPC_SEL_B32:
      return OPC_SEL_B16;
   case OPC_SEL_S32:
      return OPC_SEL_S16;
   case OPC_SEL_F32:
      return OPC_SEL_F16;
   case OPC_SAD_S32:
      return OPC_SAD_S16;
   default:
      return opc;
   }
}

static inline opc_t
cat3_full_opc(opc_t opc)
{
   switch (opc) {
   case OPC_MAD_F16:
      return OPC_MAD_F32;
   case OPC_SEL_B16:
      return OPC_SEL_B32;
   case OPC_SEL_S16:
      return OPC_SEL_S32;
   case OPC_SEL_F16:
      return OPC_SEL_F32;
   case OPC_SAD_S16:
      return OPC_SAD_S32;
   default:
      return opc;
   }
}

static inline opc_t
cat4_half_opc(opc_t opc)
{
   switch (opc) {
   case OPC_RSQ:
      return OPC_HRSQ;
   case OPC_LOG2:
      return OPC_HLOG2;
   case OPC_EXP2:
      return OPC_HEXP2;
   default:
      return opc;
   }
}

static inline opc_t
cat4_full_opc(opc_t opc)
{
   switch (opc) {
   case OPC_HRSQ:
      return OPC_RSQ;
   case OPC_HLOG2:
      return OPC_LOG2;
   case OPC_HEXP2:
      return OPC_EXP2;
   default:
      return opc;
   }
}

static inline bool
is_meta(struct ir3_instruction *instr)
{
   return (opc_cat(instr->opc) == -1);
}

static inline unsigned
reg_elems(const struct ir3_register *reg)
{
   if (reg->flags & IR3_REG_ARRAY)
      return reg->size;
   else
      return util_last_bit(reg->wrmask);
}

static inline unsigned
reg_elem_size(const struct ir3_register *reg)
{
   return (reg->flags & IR3_REG_HALF) ? 1 : 2;
}

static inline unsigned
reg_size(const struct ir3_register *reg)
{
   return reg_elems(reg) * reg_elem_size(reg);
}

static inline unsigned
dest_regs(struct ir3_instruction *instr)
{
   if (instr->dsts_count == 0)
      return 0;

   debug_assert(instr->dsts_count == 1);
   return util_last_bit(instr->dsts[0]->wrmask);
}

/* is dst a normal temp register: */
static inline bool
is_dest_gpr(struct ir3_register *dst)
{
   if (dst->wrmask == 0)
      return false;
   if ((reg_num(dst) == REG_A0) || (dst->num == regid(REG_P0, 0)))
      return false;
   return true;
}

static inline bool
writes_gpr(struct ir3_instruction *instr)
{
   if (dest_regs(instr) == 0)
      return false;
   return is_dest_gpr(instr->dsts[0]);
}

static inline bool
writes_addr0(struct ir3_instruction *instr)
{
   /* Note: only the first dest can write to a0.x */
   if (instr->dsts_count > 0) {
      struct ir3_register *dst = instr->dsts[0];
      return dst->num == regid(REG_A0, 0);
   }
   return false;
}

static inline bool
writes_addr1(struct ir3_instruction *instr)
{
   /* Note: only the first dest can write to a1.x */
   if (instr->dsts_count > 0) {
      struct ir3_register *dst = instr->dsts[0];
      return dst->num == regid(REG_A0, 1);
   }
   return false;
}

static inline bool
writes_pred(struct ir3_instruction *instr)
{
   /* Note: only the first dest can write to p0.x */
   if (instr->dsts_count > 0) {
      struct ir3_register *dst = instr->dsts[0];
      return reg_num(dst) == REG_P0;
   }
   return false;
}

/* Is it something other than a normal register. Shared regs, p0, and a0/a1
 * are considered special here. Special registers are always accessed with one
 * size and never alias normal registers, even though a naive calculation
 * would sometimes make it seem like e.g. r30.z aliases a0.x.
 */
static inline bool
is_reg_special(const struct ir3_register *reg)
{
   return (reg->flags & IR3_REG_SHARED) || (reg_num(reg) == REG_A0) ||
          (reg_num(reg) == REG_P0);
}

/* Same as above but in cases where we don't have a register. r48.x and above
 * are shared/special.
 */
static inline bool
is_reg_num_special(unsigned num)
{
   return num >= 48 * 4;
}

/* returns defining instruction for reg */
/* TODO better name */
static inline struct ir3_instruction *
ssa(struct ir3_register *reg)
{
   if ((reg->flags & (IR3_REG_SSA | IR3_REG_ARRAY)) && reg->def)
      return reg->def->instr;
   return NULL;
}

static inline bool
conflicts(struct ir3_register *a, struct ir3_register *b)
{
   return (a && b) && (a->def != b->def);
}

static inline bool
reg_gpr(struct ir3_register *r)
{
   if (r->flags & (IR3_REG_CONST | IR3_REG_IMMED))
      return false;
   if ((reg_num(r) == REG_A0) || (reg_num(r) == REG_P0))
      return false;
   return true;
}

static inline type_t
half_type(type_t type)
{
   switch (type) {
   case TYPE_F32:
      return TYPE_F16;
   case TYPE_U32:
      return TYPE_U16;
   case TYPE_S32:
      return TYPE_S16;
   case TYPE_F16:
   case TYPE_U16:
   case TYPE_S16:
      return type;
   default:
      assert(0);
      return ~0;
   }
}

static inline type_t
full_type(type_t type)
{
   switch (type) {
   case TYPE_F16:
      return TYPE_F32;
   case TYPE_U16:
      return TYPE_U32;
   case TYPE_S16:
      return TYPE_S32;
   case TYPE_F32:
   case TYPE_U32:
   case TYPE_S32:
      return type;
   default:
      assert(0);
      return ~0;
   }
}

/* some cat2 instructions (ie. those which are not float) can embed an
 * immediate:
 */
static inline bool
ir3_cat2_int(opc_t opc)
{
   switch (opc) {
   case OPC_ADD_U:
   case OPC_ADD_S:
   case OPC_SUB_U:
   case OPC_SUB_S:
   case OPC_CMPS_U:
   case OPC_CMPS_S:
   case OPC_MIN_U:
   case OPC_MIN_S:
   case OPC_MAX_U:
   case OPC_MAX_S:
   case OPC_CMPV_U:
   case OPC_CMPV_S:
   case OPC_MUL_U24:
   case OPC_MUL_S24:
   case OPC_MULL_U:
   case OPC_CLZ_S:
   case OPC_ABSNEG_S:
   case OPC_AND_B:
   case OPC_OR_B:
   case OPC_NOT_B:
   case OPC_XOR_B:
   case OPC_BFREV_B:
   case OPC_CLZ_B:
   case OPC_SHL_B:
   case OPC_SHR_B:
   case OPC_ASHR_B:
   case OPC_MGEN_B:
   case OPC_GETBIT_B:
   case OPC_CBITS_B:
   case OPC_BARY_F:
      return true;

   default:
      return false;
   }
}

/* map cat2 instruction to valid abs/neg flags: */
static inline unsigned
ir3_cat2_absneg(opc_t opc)
{
   switch (opc) {
   case OPC_ADD_F:
   case OPC_MIN_F:
   case OPC_MAX_F:
   case OPC_MUL_F:
   case OPC_SIGN_F:
   case OPC_CMPS_F:
   case OPC_ABSNEG_F:
   case OPC_CMPV_F:
   case OPC_FLOOR_F:
   case OPC_CEIL_F:
   case OPC_RNDNE_F:
   case OPC_RNDAZ_F:
   case OPC_TRUNC_F:
   case OPC_BARY_F:
      return IR3_REG_FABS | IR3_REG_FNEG;

   case OPC_ADD_U:
   case OPC_ADD_S:
   case OPC_SUB_U:
   case OPC_SUB_S:
   case OPC_CMPS_U:
   case OPC_CMPS_S:
   case OPC_MIN_U:
   case OPC_MIN_S:
   case OPC_MAX_U:
   case OPC_MAX_S:
   case OPC_CMPV_U:
   case OPC_CMPV_S:
   case OPC_MUL_U24:
   case OPC_MUL_S24:
   case OPC_MULL_U:
   case OPC_CLZ_S:
      return 0;

   case OPC_ABSNEG_S:
      return IR3_REG_SABS | IR3_REG_SNEG;

   case OPC_AND_B:
   case OPC_OR_B:
   case OPC_NOT_B:
   case OPC_XOR_B:
   case OPC_BFREV_B:
   case OPC_CLZ_B:
   case OPC_SHL_B:
   case OPC_SHR_B:
   case OPC_ASHR_B:
   case OPC_MGEN_B:
   case OPC_GETBIT_B:
   case OPC_CBITS_B:
      return IR3_REG_BNOT;

   default:
      return 0;
   }
}

/* map cat3 instructions to valid abs/neg flags: */
static inline unsigned
ir3_cat3_absneg(opc_t opc)
{
   switch (opc) {
   case OPC_MAD_F16:
   case OPC_MAD_F32:
   case OPC_SEL_F16:
   case OPC_SEL_F32:
      return IR3_REG_FNEG;

   case OPC_MAD_U16:
   case OPC_MADSH_U16:
   case OPC_MAD_S16:
   case OPC_MADSH_M16:
   case OPC_MAD_U24:
   case OPC_MAD_S24:
   case OPC_SEL_S16:
   case OPC_SEL_S32:
   case OPC_SAD_S16:
   case OPC_SAD_S32:
      /* neg *may* work on 3rd src.. */

   case OPC_SEL_B16:
   case OPC_SEL_B32:

   case OPC_SHLG_B16:

   default:
      return 0;
   }
}

/* Return the type (float, int, or uint) the op uses when converting from the
 * internal result of the op (which is assumed to be the same size as the
 * sources) to the destination when they are not the same size. If F32 it does
 * a floating-point conversion, if U32 it does a truncation/zero-extension, if
 * S32 it does a truncation/sign-extension. "can_fold" will be false if it
 * doesn't do anything sensible or is unknown.
 */
static inline type_t
ir3_output_conv_type(struct ir3_instruction *instr, bool *can_fold)
{
   *can_fold = true;
   switch (instr->opc) {
   case OPC_ADD_F:
   case OPC_MUL_F:
   case OPC_BARY_F:
   case OPC_MAD_F32:
   case OPC_MAD_F16:
      return TYPE_F32;

   case OPC_ADD_U:
   case OPC_SUB_U:
   case OPC_MIN_U:
   case OPC_MAX_U:
   case OPC_AND_B:
   case OPC_OR_B:
   case OPC_NOT_B:
   case OPC_XOR_B:
   case OPC_MUL_U24:
   case OPC_MULL_U:
   case OPC_SHL_B:
   case OPC_SHR_B:
   case OPC_ASHR_B:
   case OPC_MAD_U24:
   /* Comparison ops zero-extend/truncate their results, so consider them as
    * unsigned here.
    */
   case OPC_CMPS_F:
   case OPC_CMPV_F:
   case OPC_CMPS_U:
   case OPC_CMPS_S:
      return TYPE_U32;

   case OPC_ADD_S:
   case OPC_SUB_S:
   case OPC_MIN_S:
   case OPC_MAX_S:
   case OPC_ABSNEG_S:
   case OPC_MUL_S24:
   case OPC_MAD_S24:
      return TYPE_S32;

   /* We assume that any move->move folding that could be done was done by
    * NIR.
    */
   case OPC_MOV:
   default:
      *can_fold = false;
      return TYPE_U32;
   }
}

/* Return the src and dst types for the conversion which is already folded
 * into the op. We can assume that instr has folded in a conversion from
 * ir3_output_conv_src_type() to ir3_output_conv_dst_type(). Only makes sense
 * to call if ir3_output_conv_type() returns can_fold = true.
 */
static inline type_t
ir3_output_conv_src_type(struct ir3_instruction *instr, type_t base_type)
{
   switch (instr->opc) {
   case OPC_CMPS_F:
   case OPC_CMPV_F:
   case OPC_CMPS_U:
   case OPC_CMPS_S:
      /* Comparisons only return 0/1 and the size of the comparison sources
       * is irrelevant, never consider them as having an output conversion
       * by returning a type with the dest size here:
       */
      return (instr->dsts[0]->flags & IR3_REG_HALF) ? half_type(base_type)
                                                    : full_type(base_type);

   case OPC_BARY_F:
      /* bary.f doesn't have an explicit source, but we can assume here that
       * the varying data it reads is in fp32.
       *
       * This may be fp16 on older gen's depending on some register
       * settings, but it's probably not worth plumbing that through for a
       * small improvement that NIR would hopefully handle for us anyway.
       */
      return TYPE_F32;

   default:
      return (instr->srcs[0]->flags & IR3_REG_HALF) ? half_type(base_type)
                                                    : full_type(base_type);
   }
}

static inline type_t
ir3_output_conv_dst_type(struct ir3_instruction *instr, type_t base_type)
{
   return (instr->dsts[0]->flags & IR3_REG_HALF) ? half_type(base_type)
                                                 : full_type(base_type);
}

/* Some instructions have signed/unsigned variants which are identical except
 * for whether the folded conversion sign-extends or zero-extends, and we can
 * fold in a mismatching move by rewriting the opcode. Return the opcode to
 * switch signedness, and whether one exists.
 */
static inline opc_t
ir3_try_swap_signedness(opc_t opc, bool *can_swap)
{
   switch (opc) {
#define PAIR(u, s)                                                             \
   case OPC_##u:                                                               \
      return OPC_##s;                                                          \
   case OPC_##s:                                                               \
      return OPC_##u;
      PAIR(ADD_U, ADD_S)
      PAIR(SUB_U, SUB_S)
      /* Note: these are only identical when the sources are half, but that's
       * the only case we call this function for anyway.
       */
      PAIR(MUL_U24, MUL_S24)

   default:
      *can_swap = false;
      return opc;
   }
}

#define MASK(n) ((1 << (n)) - 1)

/* iterator for an instructions's sources (reg), also returns src #: */
#define foreach_src_n(__srcreg, __n, __instr)                                  \
   if ((__instr)->srcs_count)                                                  \
      for (struct ir3_register *__srcreg = (void *)~0; __srcreg;               \
           __srcreg = NULL)                                                    \
         for (unsigned __cnt = (__instr)->srcs_count, __n = 0; __n < __cnt;    \
              __n++)                                                           \
            if ((__srcreg = (__instr)->srcs[__n]))

/* iterator for an instructions's sources (reg): */
#define foreach_src(__srcreg, __instr) foreach_src_n (__srcreg, __i, __instr)

/* iterator for an instructions's destinations (reg), also returns dst #: */
#define foreach_dst_n(__dstreg, __n, __instr)                                  \
   if ((__instr)->dsts_count)                                                  \
      for (struct ir3_register *__dstreg = (void *)~0; __dstreg;               \
           __dstreg = NULL)                                                    \
         for (unsigned __cnt = (__instr)->dsts_count, __n = 0; __n < __cnt;    \
              __n++)                                                           \
            if ((__dstreg = (__instr)->dsts[__n]))

/* iterator for an instructions's destinations (reg): */
#define foreach_dst(__dstreg, __instr) foreach_dst_n (__dstreg, __i, __instr)

static inline unsigned
__ssa_src_cnt(struct ir3_instruction *instr)
{
   return instr->srcs_count + instr->deps_count;
}

static inline bool
__is_false_dep(struct ir3_instruction *instr, unsigned n)
{
   if (n >= instr->srcs_count)
      return true;
   return false;
}

static inline struct ir3_instruction **
__ssa_srcp_n(struct ir3_instruction *instr, unsigned n)
{
   if (__is_false_dep(instr, n))
      return &instr->deps[n - instr->srcs_count];
   if (ssa(instr->srcs[n]))
      return &instr->srcs[n]->def->instr;
   return NULL;
}

#define foreach_ssa_srcp_n(__srcp, __n, __instr)                               \
   for (struct ir3_instruction **__srcp = (void *)~0; __srcp; __srcp = NULL)   \
      for (unsigned __cnt = __ssa_src_cnt(__instr), __n = 0; __n < __cnt;      \
           __n++)                                                              \
         if ((__srcp = __ssa_srcp_n(__instr, __n)))

#define foreach_ssa_srcp(__srcp, __instr)                                      \
   foreach_ssa_srcp_n (__srcp, __i, __instr)

/* iterator for an instruction's SSA sources (instr), also returns src #: */
#define foreach_ssa_src_n(__srcinst, __n, __instr)                             \
   for (struct ir3_instruction *__srcinst = (void *)~0; __srcinst;             \
        __srcinst = NULL)                                                      \
      foreach_ssa_srcp_n (__srcp, __n, __instr)                                \
         if ((__srcinst = *__srcp))

/* iterator for an instruction's SSA sources (instr): */
#define foreach_ssa_src(__srcinst, __instr)                                    \
   foreach_ssa_src_n (__srcinst, __i, __instr)

/* iterators for shader inputs: */
#define foreach_input_n(__ininstr, __cnt, __ir)                                \
   for (struct ir3_instruction *__ininstr = (void *)~0; __ininstr;             \
        __ininstr = NULL)                                                      \
      for (unsigned __cnt = 0; __cnt < (__ir)->inputs_count; __cnt++)          \
         if ((__ininstr = (__ir)->inputs[__cnt]))
#define foreach_input(__ininstr, __ir) foreach_input_n (__ininstr, __i, __ir)

/* iterators for instructions: */
#define foreach_instr(__instr, __list)                                         \
   list_for_each_entry (struct ir3_instruction, __instr, __list, node)
#define foreach_instr_rev(__instr, __list)                                     \
   list_for_each_entry_rev (struct ir3_instruction, __instr, __list, node)
#define foreach_instr_safe(__instr, __list)                                    \
   list_for_each_entry_safe (struct ir3_instruction, __instr, __list, node)
#define foreach_instr_from_safe(__instr, __start, __list)                      \
   list_for_each_entry_from_safe(struct ir3_instruction, __instr, __start,     \
                                 __list, node)

/* iterators for blocks: */
#define foreach_block(__block, __list)                                         \
   list_for_each_entry (struct ir3_block, __block, __list, node)
#define foreach_block_safe(__block, __list)                                    \
   list_for_each_entry_safe (struct ir3_block, __block, __list, node)
#define foreach_block_rev(__block, __list)                                     \
   list_for_each_entry_rev (struct ir3_block, __block, __list, node)

/* iterators for arrays: */
#define foreach_array(__array, __list)                                         \
   list_for_each_entry (struct ir3_array, __array, __list, node)
#define foreach_array_safe(__array, __list)                                    \
   list_for_each_entry_safe (struct ir3_array, __array, __list, node)

#define IR3_PASS(ir, pass, ...)                                                \
   ({                                                                          \
      bool progress = pass(ir, ##__VA_ARGS__);                                 \
      if (progress) {                                                          \
         ir3_debug_print(ir, "AFTER: " #pass);                                 \
         ir3_validate(ir);                                                     \
      }                                                                        \
      progress;                                                                \
   })

/* validate: */
void ir3_validate(struct ir3 *ir);

/* dump: */
void ir3_print(struct ir3 *ir);
void ir3_print_instr(struct ir3_instruction *instr);

struct log_stream;
void ir3_print_instr_stream(struct log_stream *stream, struct ir3_instruction *instr);

/* delay calculation: */
int ir3_delayslots(struct ir3_instruction *assigner,
                   struct ir3_instruction *consumer, unsigned n, bool soft);
unsigned ir3_delay_calc_prera(struct ir3_block *block,
                              struct ir3_instruction *instr);
unsigned ir3_delay_calc_postra(struct ir3_block *block,
                               struct ir3_instruction *instr, bool soft,
                               bool mergedregs);
unsigned ir3_delay_calc_exact(struct ir3_block *block,
                              struct ir3_instruction *instr, bool mergedregs);
void ir3_remove_nops(struct ir3 *ir);

/* unreachable block elimination: */
bool ir3_remove_unreachable(struct ir3 *ir);

/* dead code elimination: */
struct ir3_shader_variant;
bool ir3_dce(struct ir3 *ir, struct ir3_shader_variant *so);

/* fp16 conversion folding */
bool ir3_cf(struct ir3 *ir);

/* copy-propagate: */
bool ir3_cp(struct ir3 *ir, struct ir3_shader_variant *so);
bool ir3_cp_postsched(struct ir3 *ir);

/* common subexpression elimination: */
bool ir3_cse(struct ir3 *ir);

/* Make arrays SSA */
bool ir3_array_to_ssa(struct ir3 *ir);

/* scheduling: */
bool ir3_sched_add_deps(struct ir3 *ir);
int ir3_sched(struct ir3 *ir);

struct ir3_context;
bool ir3_postsched(struct ir3 *ir, struct ir3_shader_variant *v);

/* register assignment: */
int ir3_ra(struct ir3_shader_variant *v);

/* lower subgroup ops: */
bool ir3_lower_subgroups(struct ir3 *ir);

/* legalize: */
bool ir3_legalize(struct ir3 *ir, struct ir3_shader_variant *so, int *max_bary);

static inline bool
ir3_has_latency_to_hide(struct ir3 *ir)
{
   /* VS/GS/TCS/TESS  co-exist with frag shader invocations, but we don't
    * know the nature of the fragment shader.  Just assume it will have
    * latency to hide:
    */
   if (ir->type != MESA_SHADER_FRAGMENT)
      return true;

   foreach_block (block, &ir->block_list) {
      foreach_instr (instr, &block->instr_list) {
         if (is_tex_or_prefetch(instr))
            return true;

         if (is_load(instr)) {
            switch (instr->opc) {
            case OPC_LDLV:
            case OPC_LDL:
            case OPC_LDLW:
               break;
            default:
               return true;
            }
         }
      }
   }

   return false;
}

/* ************************************************************************* */
/* instruction helpers */

/* creates SSA src of correct type (ie. half vs full precision) */
static inline struct ir3_register *
__ssa_src(struct ir3_instruction *instr, struct ir3_instruction *src,
          unsigned flags)
{
   struct ir3_register *reg;
   if (src->dsts[0]->flags & IR3_REG_HALF)
      flags |= IR3_REG_HALF;
   reg = ir3_src_create(instr, INVALID_REG, IR3_REG_SSA | flags);
   reg->def = src->dsts[0];
   reg->wrmask = src->dsts[0]->wrmask;
   return reg;
}

static inline struct ir3_register *
__ssa_dst(struct ir3_instruction *instr)
{
   struct ir3_register *reg = ir3_dst_create(instr, INVALID_REG, IR3_REG_SSA);
   reg->instr = instr;
   return reg;
}

static inline struct ir3_instruction *
create_immed_typed(struct ir3_block *block, uint32_t val, type_t type)
{
   struct ir3_instruction *mov;
   unsigned flags = (type_size(type) < 32) ? IR3_REG_HALF : 0;

   mov = ir3_instr_create(block, OPC_MOV, 1, 1);
   mov->cat1.src_type = type;
   mov->cat1.dst_type = type;
   __ssa_dst(mov)->flags |= flags;
   ir3_src_create(mov, 0, IR3_REG_IMMED | flags)->uim_val = val;

   return mov;
}

static inline struct ir3_instruction *
create_immed(struct ir3_block *block, uint32_t val)
{
   return create_immed_typed(block, val, TYPE_U32);
}

static inline struct ir3_instruction *
create_uniform_typed(struct ir3_block *block, unsigned n, type_t type)
{
   struct ir3_instruction *mov;
   unsigned flags = (type_size(type) < 32) ? IR3_REG_HALF : 0;

   mov = ir3_instr_create(block, OPC_MOV, 1, 1);
   mov->cat1.src_type = type;
   mov->cat1.dst_type = type;
   __ssa_dst(mov)->flags |= flags;
   ir3_src_create(mov, n, IR3_REG_CONST | flags);

   return mov;
}

static inline struct ir3_instruction *
create_uniform(struct ir3_block *block, unsigned n)
{
   return create_uniform_typed(block, n, TYPE_F32);
}

static inline struct ir3_instruction *
create_uniform_indirect(struct ir3_block *block, int n, type_t type,
                        struct ir3_instruction *address)
{
   struct ir3_instruction *mov;

   mov = ir3_instr_create(block, OPC_MOV, 1, 1);
   mov->cat1.src_type = type;
   mov->cat1.dst_type = type;
   __ssa_dst(mov);
   ir3_src_create(mov, 0, IR3_REG_CONST | IR3_REG_RELATIV)->array.offset = n;

   ir3_instr_set_address(mov, address);

   return mov;
}

static inline struct ir3_instruction *
ir3_MOV(struct ir3_block *block, struct ir3_instruction *src, type_t type)
{
   struct ir3_instruction *instr = ir3_instr_create(block, OPC_MOV, 1, 1);
   unsigned flags = (type_size(type) < 32) ? IR3_REG_HALF : 0;

   __ssa_dst(instr)->flags |= flags;
   if (src->dsts[0]->flags & IR3_REG_ARRAY) {
      struct ir3_register *src_reg = __ssa_src(instr, src, IR3_REG_ARRAY);
      src_reg->array = src->dsts[0]->array;
   } else {
      __ssa_src(instr, src, src->dsts[0]->flags & IR3_REG_SHARED);
   }
   debug_assert(!(src->dsts[0]->flags & IR3_REG_RELATIV));
   instr->cat1.src_type = type;
   instr->cat1.dst_type = type;
   return instr;
}

static inline struct ir3_instruction *
ir3_COV(struct ir3_block *block, struct ir3_instruction *src, type_t src_type,
        type_t dst_type)
{
   struct ir3_instruction *instr = ir3_instr_create(block, OPC_MOV, 1, 1);
   unsigned dst_flags = (type_size(dst_type) < 32) ? IR3_REG_HALF : 0;
   unsigned src_flags = (type_size(src_type) < 32) ? IR3_REG_HALF : 0;

   debug_assert((src->dsts[0]->flags & IR3_REG_HALF) == src_flags);

   __ssa_dst(instr)->flags |= dst_flags;
   __ssa_src(instr, src, 0);
   instr->cat1.src_type = src_type;
   instr->cat1.dst_type = dst_type;
   debug_assert(!(src->dsts[0]->flags & IR3_REG_ARRAY));
   return instr;
}

static inline struct ir3_instruction *
ir3_MOVMSK(struct ir3_block *block, unsigned components)
{
   struct ir3_instruction *instr = ir3_instr_create(block, OPC_MOVMSK, 1, 0);

   struct ir3_register *dst = __ssa_dst(instr);
   dst->flags |= IR3_REG_SHARED;
   dst->wrmask = (1 << components) - 1;
   instr->repeat = components - 1;
   return instr;
}

static inline struct ir3_instruction *
ir3_BALLOT_MACRO(struct ir3_block *block, struct ir3_instruction *src,
                 unsigned components)
{
   struct ir3_instruction *instr =
      ir3_instr_create(block, OPC_BALLOT_MACRO, 1, 1);

   struct ir3_register *dst = __ssa_dst(instr);
   dst->flags |= IR3_REG_SHARED;
   dst->wrmask = (1 << components) - 1;

   __ssa_src(instr, src, 0);

   return instr;
}

static inline struct ir3_instruction *
ir3_NOP(struct ir3_block *block)
{
   return ir3_instr_create(block, OPC_NOP, 0, 0);
}

#define IR3_INSTR_0 0

/* clang-format off */
#define __INSTR0(flag, name, opc)                                              \
static inline struct ir3_instruction *ir3_##name(struct ir3_block *block)      \
{                                                                              \
   struct ir3_instruction *instr = ir3_instr_create(block, opc, 1, 0);         \
   instr->flags |= flag;                                                       \
   return instr;                                                               \
}
/* clang-format on */
#define INSTR0F(f, name) __INSTR0(IR3_INSTR_##f, name##_##f, OPC_##name)
#define INSTR0(name)     __INSTR0(0, name, OPC_##name)

/* clang-format off */
#define __INSTR1(flag, dst_count, name, opc)                                   \
static inline struct ir3_instruction *ir3_##name(                              \
   struct ir3_block *block, struct ir3_instruction *a, unsigned aflags)        \
{                                                                              \
   struct ir3_instruction *instr =                                             \
      ir3_instr_create(block, opc, dst_count, 1);                              \
   for (unsigned i = 0; i < dst_count; i++)                                    \
      __ssa_dst(instr);                                                        \
   __ssa_src(instr, a, aflags);                                                \
   instr->flags |= flag;                                                       \
   return instr;                                                               \
}
/* clang-format on */
#define INSTR1F(f, name)  __INSTR1(IR3_INSTR_##f, 1, name##_##f, OPC_##name)
#define INSTR1(name)      __INSTR1(0, 1, name, OPC_##name)
#define INSTR1NODST(name) __INSTR1(0, 0, name, OPC_##name)

/* clang-format off */
#define __INSTR2(flag, name, opc)                                              \
static inline struct ir3_instruction *ir3_##name(                              \
   struct ir3_block *block, struct ir3_instruction *a, unsigned aflags,        \
   struct ir3_instruction *b, unsigned bflags)                                 \
{                                                                              \
   struct ir3_instruction *instr = ir3_instr_create(block, opc, 1, 2);         \
   __ssa_dst(instr);                                                           \
   __ssa_src(instr, a, aflags);                                                \
   __ssa_src(instr, b, bflags);                                                \
   instr->flags |= flag;                                                       \
   return instr;                                                               \
}
/* clang-format on */
#define INSTR2F(f, name) __INSTR2(IR3_INSTR_##f, name##_##f, OPC_##name)
#define INSTR2(name)     __INSTR2(0, name, OPC_##name)

/* clang-format off */
#define __INSTR3(flag, dst_count, name, opc)                                   \
static inline struct ir3_instruction *ir3_##name(                              \
   struct ir3_block *block, struct ir3_instruction *a, unsigned aflags,        \
   struct ir3_instruction *b, unsigned bflags, struct ir3_instruction *c,      \
   unsigned cflags)                                                            \
{                                                                              \
   struct ir3_instruction *instr =                                             \
      ir3_instr_create(block, opc, dst_count, 3);                              \
   for (unsigned i = 0; i < dst_count; i++)                                    \
      __ssa_dst(instr);                                                        \
   __ssa_src(instr, a, aflags);                                                \
   __ssa_src(instr, b, bflags);                                                \
   __ssa_src(instr, c, cflags);                                                \
   instr->flags |= flag;                                                       \
   return instr;                                                               \
}
/* clang-format on */
#define INSTR3F(f, name)  __INSTR3(IR3_INSTR_##f, 1, name##_##f, OPC_##name)
#define INSTR3(name)      __INSTR3(0, 1, name, OPC_##name)
#define INSTR3NODST(name) __INSTR3(0, 0, name, OPC_##name)

/* clang-format off */
#define __INSTR4(flag, dst_count, name, opc)                                   \
static inline struct ir3_instruction *ir3_##name(                              \
   struct ir3_block *block, struct ir3_instruction *a, unsigned aflags,        \
   struct ir3_instruction *b, unsigned bflags, struct ir3_instruction *c,      \
   unsigned cflags, struct ir3_instruction *d, unsigned dflags)                \
{                                                                              \
   struct ir3_instruction *instr =                                             \
      ir3_instr_create(block, opc, dst_count, 4);                              \
   for (unsigned i = 0; i < dst_count; i++)                                    \
      __ssa_dst(instr);                                                        \
   __ssa_src(instr, a, aflags);                                                \
   __ssa_src(instr, b, bflags);                                                \
   __ssa_src(instr, c, cflags);                                                \
   __ssa_src(instr, d, dflags);                                                \
   instr->flags |= flag;                                                       \
   return instr;                                                               \
}
/* clang-format on */
#define INSTR4F(f, name)  __INSTR4(IR3_INSTR_##f, 1, name##_##f, OPC_##name)
#define INSTR4(name)      __INSTR4(0, 1, name, OPC_##name)
#define INSTR4NODST(name) __INSTR4(0, 0, name, OPC_##name)

/* clang-format off */
#define __INSTR5(flag, name, opc)                                              \
static inline struct ir3_instruction *ir3_##name(                              \
   struct ir3_block *block, struct ir3_instruction *a, unsigned aflags,        \
   struct ir3_instruction *b, unsigned bflags, struct ir3_instruction *c,      \
   unsigned cflags, struct ir3_instruction *d, unsigned dflags,                \
   struct ir3_instruction *e, unsigned eflags)                                 \
{                                                                              \
   struct ir3_instruction *instr = ir3_instr_create(block, opc, 1, 5);         \
   __ssa_dst(instr);                                                           \
   __ssa_src(instr, a, aflags);                                                \
   __ssa_src(instr, b, bflags);                                                \
   __ssa_src(instr, c, cflags);                                                \
   __ssa_src(instr, d, dflags);                                                \
   __ssa_src(instr, e, eflags);                                                \
   instr->flags |= flag;                                                       \
   return instr;                                                               \
}
/* clang-format on */
#define INSTR5F(f, name) __INSTR5(IR3_INSTR_##f, name##_##f, OPC_##name)
#define INSTR5(name)     __INSTR5(0, name, OPC_##name)

/* clang-format off */
#define __INSTR6(flag, dst_count, name, opc)                                   \
static inline struct ir3_instruction *ir3_##name(                              \
   struct ir3_block *block, struct ir3_instruction *a, unsigned aflags,        \
   struct ir3_instruction *b, unsigned bflags, struct ir3_instruction *c,      \
   unsigned cflags, struct ir3_instruction *d, unsigned dflags,                \
   struct ir3_instruction *e, unsigned eflags, struct ir3_instruction *f,      \
   unsigned fflags)                                                            \
{                                                                              \
   struct ir3_instruction *instr = ir3_instr_create(block, opc, 1, 6);         \
   for (unsigned i = 0; i < dst_count; i++)                                    \
      __ssa_dst(instr);                                                        \
   __ssa_src(instr, a, aflags);                                                \
   __ssa_src(instr, b, bflags);                                                \
   __ssa_src(instr, c, cflags);                                                \
   __ssa_src(instr, d, dflags);                                                \
   __ssa_src(instr, e, eflags);                                                \
   __ssa_src(instr, f, fflags);                                                \
   instr->flags |= flag;                                                       \
   return instr;                                                               \
}
/* clang-format on */
#define INSTR6F(f, name)  __INSTR6(IR3_INSTR_##f, 1, name##_##f, OPC_##name)
#define INSTR6(name)      __INSTR6(0, 1, name, OPC_##name)
#define INSTR6NODST(name) __INSTR6(0, 0, name, OPC_##name)

/* cat0 instructions: */
INSTR1NODST(B)
INSTR0(JUMP)
INSTR1NODST(KILL)
INSTR1NODST(DEMOTE)
INSTR0(END)
INSTR0(CHSH)
INSTR0(CHMASK)
INSTR1NODST(PREDT)
INSTR0(PREDF)
INSTR0(PREDE)
INSTR0(GETONE)

/* cat1 macros */
INSTR1(ANY_MACRO)
INSTR1(ALL_MACRO)
INSTR1(READ_FIRST_MACRO)
INSTR2(READ_COND_MACRO)

static inline struct ir3_instruction *
ir3_ELECT_MACRO(struct ir3_block *block)
{
   struct ir3_instruction *instr =
      ir3_instr_create(block, OPC_ELECT_MACRO, 1, 0);
   __ssa_dst(instr);
   return instr;
}

/* cat2 instructions, most 2 src but some 1 src: */
INSTR2(ADD_F)
INSTR2(MIN_F)
INSTR2(MAX_F)
INSTR2(MUL_F)
INSTR1(SIGN_F)
INSTR2(CMPS_F)
INSTR1(ABSNEG_F)
INSTR2(CMPV_F)
INSTR1(FLOOR_F)
INSTR1(CEIL_F)
INSTR1(RNDNE_F)
INSTR1(RNDAZ_F)
INSTR1(TRUNC_F)
INSTR2(ADD_U)
INSTR2(ADD_S)
INSTR2(SUB_U)
INSTR2(SUB_S)
INSTR2(CMPS_U)
INSTR2(CMPS_S)
INSTR2(MIN_U)
INSTR2(MIN_S)
INSTR2(MAX_U)
INSTR2(MAX_S)
INSTR1(ABSNEG_S)
INSTR2(AND_B)
INSTR2(OR_B)
INSTR1(NOT_B)
INSTR2(XOR_B)
INSTR2(CMPV_U)
INSTR2(CMPV_S)
INSTR2(MUL_U24)
INSTR2(MUL_S24)
INSTR2(MULL_U)
INSTR1(BFREV_B)
INSTR1(CLZ_S)
INSTR1(CLZ_B)
INSTR2(SHL_B)
INSTR2(SHR_B)
INSTR2(ASHR_B)
INSTR2(BARY_F)
INSTR2(MGEN_B)
INSTR2(GETBIT_B)
INSTR1(SETRM)
INSTR1(CBITS_B)
INSTR2(SHB)
INSTR2(MSAD)

/* cat3 instructions: */
INSTR3(MAD_U16)
INSTR3(MADSH_U16)
INSTR3(MAD_S16)
INSTR3(MADSH_M16)
INSTR3(MAD_U24)
INSTR3(MAD_S24)
INSTR3(MAD_F16)
INSTR3(MAD_F32)
/* NOTE: SEL_B32 checks for zero vs nonzero */
INSTR3(SEL_B16)
INSTR3(SEL_B32)
INSTR3(SEL_S16)
INSTR3(SEL_S32)
INSTR3(SEL_F16)
INSTR3(SEL_F32)
INSTR3(SAD_S16)
INSTR3(SAD_S32)

/* cat4 instructions: */
INSTR1(RCP)
INSTR1(RSQ)
INSTR1(HRSQ)
INSTR1(LOG2)
INSTR1(HLOG2)
INSTR1(EXP2)
INSTR1(HEXP2)
INSTR1(SIN)
INSTR1(COS)
INSTR1(SQRT)

/* cat5 instructions: */
INSTR1(DSX)
INSTR1(DSXPP_MACRO)
INSTR1(DSY)
INSTR1(DSYPP_MACRO)
INSTR1F(3D, DSX)
INSTR1F(3D, DSY)
INSTR1(RGETPOS)

static inline struct ir3_instruction *
ir3_SAM(struct ir3_block *block, opc_t opc, type_t type, unsigned wrmask,
        unsigned flags, struct ir3_instruction *samp_tex,
        struct ir3_instruction *src0, struct ir3_instruction *src1)
{
   struct ir3_instruction *sam;
   unsigned nreg = 0;

   if (flags & IR3_INSTR_S2EN) {
      nreg++;
   }
   if (src0) {
      nreg++;
   }
   if (src1) {
      nreg++;
   }

   sam = ir3_instr_create(block, opc, 1, nreg);
   sam->flags |= flags;
   __ssa_dst(sam)->wrmask = wrmask;
   if (flags & IR3_INSTR_S2EN) {
      __ssa_src(sam, samp_tex, (flags & IR3_INSTR_B) ? 0 : IR3_REG_HALF);
   }
   if (src0) {
      __ssa_src(sam, src0, 0);
   }
   if (src1) {
      __ssa_src(sam, src1, 0);
   }
   sam->cat5.type = type;

   return sam;
}

/* cat6 instructions: */
INSTR2(LDLV)
INSTR3(LDG)
INSTR3(LDL)
INSTR3(LDLW)
INSTR3(LDP)
INSTR4NODST(STG)
INSTR3NODST(STL)
INSTR3NODST(STLW)
INSTR3NODST(STP)
INSTR1(RESINFO)
INSTR1(RESFMT)
INSTR2(ATOMIC_ADD)
INSTR2(ATOMIC_SUB)
INSTR2(ATOMIC_XCHG)
INSTR2(ATOMIC_INC)
INSTR2(ATOMIC_DEC)
INSTR2(ATOMIC_CMPXCHG)
INSTR2(ATOMIC_MIN)
INSTR2(ATOMIC_MAX)
INSTR2(ATOMIC_AND)
INSTR2(ATOMIC_OR)
INSTR2(ATOMIC_XOR)
INSTR2(LDC)
#if GPU >= 600
INSTR3NODST(STIB);
INSTR2(LDIB);
INSTR5(LDG_A);
INSTR6NODST(STG_A);
INSTR3F(G, ATOMIC_ADD)
INSTR3F(G, ATOMIC_SUB)
INSTR3F(G, ATOMIC_XCHG)
INSTR3F(G, ATOMIC_INC)
INSTR3F(G, ATOMIC_DEC)
INSTR3F(G, ATOMIC_CMPXCHG)
INSTR3F(G, ATOMIC_MIN)
INSTR3F(G, ATOMIC_MAX)
INSTR3F(G, ATOMIC_AND)
INSTR3F(G, ATOMIC_OR)
INSTR3F(G, ATOMIC_XOR)
#elif GPU >= 400
INSTR3(LDGB)
#if GPU >= 500
INSTR3(LDIB)
#endif
INSTR4NODST(STGB)
INSTR4NODST(STIB)
INSTR4F(G, ATOMIC_ADD)
INSTR4F(G, ATOMIC_SUB)
INSTR4F(G, ATOMIC_XCHG)
INSTR4F(G, ATOMIC_INC)
INSTR4F(G, ATOMIC_DEC)
INSTR4F(G, ATOMIC_CMPXCHG)
INSTR4F(G, ATOMIC_MIN)
INSTR4F(G, ATOMIC_MAX)
INSTR4F(G, ATOMIC_AND)
INSTR4F(G, ATOMIC_OR)
INSTR4F(G, ATOMIC_XOR)
#endif

/* cat7 instructions: */
INSTR0(BAR)
INSTR0(FENCE)

/* ************************************************************************* */
#include "bitset.h"

#define MAX_REG 256

typedef BITSET_DECLARE(regmaskstate_t, 2 * MAX_REG);

typedef struct {
   bool mergedregs;
   regmaskstate_t mask;
} regmask_t;

static inline bool
__regmask_get(regmask_t *regmask, bool half, unsigned n)
{
   if (regmask->mergedregs) {
      /* a6xx+ case, with merged register file, we track things in terms
       * of half-precision registers, with a full precisions register
       * using two half-precision slots.
       *
       * Pretend that special regs (a0.x, a1.x, etc.) are full registers to
       * avoid having them alias normal full regs.
       */
      if (half && !is_reg_num_special(n)) {
         return BITSET_TEST(regmask->mask, n);
      } else {
         n *= 2;
         return BITSET_TEST(regmask->mask, n) ||
                BITSET_TEST(regmask->mask, n + 1);
      }
   } else {
      /* pre a6xx case, with separate register file for half and full
       * precision:
       */
      if (half)
         n += MAX_REG;
      return BITSET_TEST(regmask->mask, n);
   }
}

static inline void
__regmask_set(regmask_t *regmask, bool half, unsigned n)
{
   if (regmask->mergedregs) {
      /* a6xx+ case, with merged register file, we track things in terms
       * of half-precision registers, with a full precisions register
       * using two half-precision slots:
       */
      if (half && !is_reg_num_special(n)) {
         BITSET_SET(regmask->mask, n);
      } else {
         n *= 2;
         BITSET_SET(regmask->mask, n);
         BITSET_SET(regmask->mask, n + 1);
      }
   } else {
      /* pre a6xx case, with separate register file for half and full
       * precision:
       */
      if (half)
         n += MAX_REG;
      BITSET_SET(regmask->mask, n);
   }
}

static inline void
__regmask_clear(regmask_t *regmask, bool half, unsigned n)
{
   if (regmask->mergedregs) {
      /* a6xx+ case, with merged register file, we track things in terms
       * of half-precision registers, with a full precisions register
       * using two half-precision slots:
       */
      if (half && !is_reg_num_special(n)) {
         BITSET_CLEAR(regmask->mask, n);
      } else {
         n *= 2;
         BITSET_CLEAR(regmask->mask, n);
         BITSET_CLEAR(regmask->mask, n + 1);
      }
   } else {
      /* pre a6xx case, with separate register file for half and full
       * precision:
       */
      if (half)
         n += MAX_REG;
      BITSET_CLEAR(regmask->mask, n);
   }
}

static inline void
regmask_init(regmask_t *regmask, bool mergedregs)
{
   memset(&regmask->mask, 0, sizeof(regmask->mask));
   regmask->mergedregs = mergedregs;
}

static inline void
regmask_or(regmask_t *dst, regmask_t *a, regmask_t *b)
{
   assert(dst->mergedregs == a->mergedregs);
   assert(dst->mergedregs == b->mergedregs);

   for (unsigned i = 0; i < ARRAY_SIZE(dst->mask); i++)
      dst->mask[i] = a->mask[i] | b->mask[i];
}


static inline void
regmask_set(regmask_t *regmask, struct ir3_register *reg)
{
   bool half = reg->flags & IR3_REG_HALF;
   if (reg->flags & IR3_REG_RELATIV) {
      for (unsigned i = 0; i < reg->size; i++)
         __regmask_set(regmask, half, reg->array.base + i);
   } else {
      for (unsigned mask = reg->wrmask, n = reg->num; mask; mask >>= 1, n++)
         if (mask & 1)
            __regmask_set(regmask, half, n);
   }
}

static inline bool
regmask_get(regmask_t *regmask, struct ir3_register *reg)
{
   bool half = reg->flags & IR3_REG_HALF;
   if (reg->flags & IR3_REG_RELATIV) {
      for (unsigned i = 0; i < reg->size; i++)
         if (__regmask_get(regmask, half, reg->array.base + i))
            return true;
   } else {
      for (unsigned mask = reg->wrmask, n = reg->num; mask; mask >>= 1, n++)
         if (mask & 1)
            if (__regmask_get(regmask, half, n))
               return true;
   }
   return false;
}
/* ************************************************************************* */

#endif /* IR3_H_ */