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/* stats.c -- Various statistics about instruction scheduling etc.
   Copyright (C) 1999 Damjan Lampret, lampret@opencores.org
 
This file is part of OpenRISC 1000 Architectural Simulator.
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
 
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
#include <stdio.h>
#include <ctype.h>
#include <string.h>
 
#include "abstract.h"
#include "stats.h"
#include "sim-config.h"
#include "sprs.h"
#include "spr_defs.h"
 
struct branchstat {
	int taken;
	int nottaken;
	int forward;
	int backward;
};
 
/* See also enum insn_type in abstract.h */
const char func_unit_str[30][30] = { "unknown", "exception", "arith", "shift", "compare",
  "branch", "jump", "load", "store", "movimm", "move", "extend", "nop", "mac" };
 
struct dstats_entry dstats[DSTATS_LEN];       /* dependency stats */
struct sstats_entry sstats[SSTATS_LEN];       /* single stats */
struct fstats_entry fstats[FSTATS_LEN];       /* functional units stats */
struct mstats_entry mstats = {0};             /* misc units stats */
struct cachestats_entry ic_stats = {0};       /* instruction cache stats */
struct cachestats_entry dc_stats = {0};       /* data cache stats */
struct immustats_entry immu_stats = {0};      /* insn mmu stats */
struct dmmustats_entry dmmu_stats = {0};      /* data mmu stats */
struct raw_stats raw_stats = {0};             /* RAW hazard stats */
 
/* Dependency */
 
int check_depend()
{ 
  debug(5,"check_depend\n");
  return depend_operands(&icomplet[0], &iqueue[0]);
}
 
void addsstats(int item, int cnt_dynamic)
{
  int i = 0;
 
  while(sstats[i].insn != item && sstats[i].insn >= 0 && i < SSTATS_LEN) i++;
 
  if (i >= SSTATS_LEN - 1) return;
 
  if (sstats[i].insn >= 0) {
    sstats[i].cnt_dynamic += cnt_dynamic;
  } else {
    sstats[i].insn = item;
    sstats[i].cnt_dynamic = cnt_dynamic;
  }
}
 
void adddstats(int item1, int item2, int cnt_dynamic, int depend)
{
  int i = 0;
 
  debug(7,"adddstats start\n");
 
  while((dstats[i].insn1 != item1 || dstats[i].insn2 != item2) && (i < DSTATS_LEN) && dstats[i].insn1 >= 0) i++;
 
  if (i >= DSTATS_LEN - 1) return;
 
  if (dstats[i].insn1 >= 0) {
    dstats[i].cnt_dynamic += cnt_dynamic;
    dstats[i].depend += depend;
  } else {
    dstats[i].insn1 = item1;
    dstats[i].insn2 = item2;
    dstats[i].cnt_dynamic = cnt_dynamic;
    dstats[i].depend = depend;
  }
}
 
void addfstats(enum insn_type item1, enum insn_type item2, int cnt_dynamic, int depend)
{
  int i = 0;
 
  while(((fstats[i].insn1 != item1) || (fstats[i].insn2 != item2)) &&
        (fstats[i].insn1 != it_unknown) &&
        (i < FSTATS_LEN))
    i++;
 
  if (i >= FSTATS_LEN - 1) return;
 
  if ((fstats[i].insn1 == item1) &&
      (fstats[i].insn2 == item2)) {
    fstats[i].cnt_dynamic += cnt_dynamic;
    fstats[i].depend += depend;
  }
  else {
    fstats[i].insn1 = item1;
    fstats[i].insn2 = item2;
    fstats[i].cnt_dynamic = cnt_dynamic;
    fstats[i].depend = depend;
  }
}
 
void initstats()
{
  int i;
  memset(sstats, 0, sizeof(sstats));
  for (i = 0; i < DSTATS_LEN; i++)
    sstats[i].insn = -1;
  memset(dstats, 0, sizeof(dstats));
  for (i = 0; i < DSTATS_LEN; i++)
    dstats[i].insn1 = dstats[i].insn2 = -1;
  memset(fstats, 0, sizeof(fstats));
  memset(&mstats, 0, sizeof(mstats));
  memset(&ic_stats, 0, sizeof(ic_stats));
  memset(&dc_stats, 0, sizeof(dc_stats));
  memset(&raw_stats, 0, sizeof(raw_stats));
}
 
void printotherstats(int which)
{
  int i, all = 0, dependall = 0;
 
  printf ("\n");  
  if (config.bpb.enabled) {
    struct branchstat bf;
    struct branchstat bnf;
    long bf_all, bnf_all;
    bf.taken = mstats.bf[1][0] + mstats.bf[1][1];
    bf.nottaken = mstats.bf[0][0] + mstats.bf[0][1];
    bf.forward = mstats.bf[0][1] + mstats.bf[1][1];
    bf.backward = mstats.bf[0][0] + mstats.bf[1][0];
    bf_all = bf.forward + bf.backward;
 
    bnf.taken = mstats.bnf[1][0] + mstats.bf[1][1];
    bnf.nottaken = mstats.bnf[0][0] + mstats.bf[0][1];
    bnf.forward = mstats.bnf[0][1] + mstats.bf[1][1];
    bnf.backward = mstats.bnf[0][0] + mstats.bf[1][0];
    bnf_all = bnf.forward + bnf.backward;
 
    printf("bnf: %d (%d%%) taken,", bf.taken, (bf.taken * 100) / SD(bf_all));
    printf(" %d (%d%%) not taken,", bf.nottaken, (bf.nottaken * 100) / SD(bf_all));
    printf(" %d (%d%%) forward,", bf.forward, (bf.forward * 100) / SD(bf_all));
    printf(" %d (%d%%) backward\n", bf.backward, (bf.backward * 100) / SD(bf_all));
    printf("bf: %d (%d%%) taken,", bnf.taken, (bnf.taken * 100) / SD(bnf_all));
    printf(" %d (%d%%) not taken,", bnf.nottaken, (bnf.nottaken * 100) / SD(bnf_all));
    printf(" %d (%d%%) forward,", bnf.forward, (bnf.forward * 100) / SD(bnf_all));
    printf(" %d (%d%%) backward\n", bnf.backward, (bnf.backward * 100) / SD(bnf_all));
 
    printf("StaticBP bnf(%s): correct %d%%\n", config.bpb.sbp_bnf_fwd ? "forward" : "backward",
      (mstats.bnf[0][config.bpb.sbp_bnf_fwd] * 100) / SD(bnf_all));
    printf("StaticBP bf(%s): correct %d%%\n", config.bpb.sbp_bf_fwd ? "forward" : "backward",
      (mstats.bnf[1][config.bpb.sbp_bf_fwd] * 100) / SD(bf_all));
    printf("BPB: hit %d (correct %d%%), miss %d\n", mstats.bpb.hit, (mstats.bpb.correct * 100) / SD(mstats.bpb.hit), mstats.bpb.miss);
  } else
    printf("BPB simulation disabled. Enable it to see BPB analysis\n");
 
  if (config.bpb.btic) {
    printf("BTIC: hit %d(%d%%), miss %d\n", mstats.btic.hit, (mstats.btic.hit * 100) / SD(mstats.btic.hit + mstats.btic.miss), mstats.btic.miss);
  } else
    printf("BTIC simulation disabled. Enabled it to see BTIC analysis\n");
 
  if (config.ic.enabled) {
    printf("IC read:  hit %d(%d%%), miss %d\n", ic_stats.readhit, (ic_stats.readhit * 100) / SD(ic_stats.readhit + ic_stats.readmiss), ic_stats.readmiss);
  } else
    printf("No ICache. Enable it to see IC results.\n");
 
  if (config.dc.enabled) {
    printf("DC read:  hit %d(%d%%), miss %d\n", dc_stats.readhit, (dc_stats.readhit * 100) / SD(dc_stats.readhit + dc_stats.readmiss), dc_stats.readmiss);
    printf("DC write: hit %d(%d%%), miss %d\n", dc_stats.writehit, (dc_stats.writehit * 100) / SD(dc_stats.writehit + dc_stats.writemiss), dc_stats.writemiss);
  } else
    printf("No DCache. Enable it to see DC results.\n");
 
  if (testsprbits(SPR_UPR, SPR_UPR_IMP)) {
    printf("IMMU read:  hit %d(%d%%), miss %d\n", immu_stats.fetch_tlbhit, (immu_stats.fetch_tlbhit * 100) / SD(immu_stats.fetch_tlbhit + immu_stats.fetch_tlbmiss), immu_stats.fetch_tlbmiss);
  } else
    printf("No IMMU. Set UPR[IMP]\n");
 
  if (testsprbits(SPR_UPR, SPR_UPR_DMP)) {
    printf("DMMU read:  hit %d(%d%%), miss %d\n", dmmu_stats.loads_tlbhit, (dmmu_stats.loads_tlbhit * 100) / SD(dmmu_stats.loads_tlbhit + dmmu_stats.loads_tlbmiss), dmmu_stats.loads_tlbmiss);
  } else
    printf("No DMMU. Set UPR[DMP]\n");
 
  printf("Additional LOAD CYCLES: %u  STORE CYCLES: %u\n", runtime.sim.loadcycles, runtime.sim.storecycles);
}
 
void printstats(int which)
{
  int i, all = 0, dependall = 0;
 
  if (which > 1 && which <= 5 && !config.cpu.dependstats) {
    printf("Hazard analysis disabled. Enable it to see analysis results.\n");
    return;
  }
 
  switch (which) {
  case 1:
    printf("stats 1: Misc stats\n");
    printotherstats(which);
    break;
  case 2:
    printf ("stats 2: Instruction usage\n");
    for(i = 0; i < SSTATS_LEN; i++)
      all += sstats[i].cnt_dynamic;
 
    for(i = 0; i < SSTATS_LEN; i++)
      if (sstats[i].cnt_dynamic)
        printf("  %-15s used %6dx (%5.1f%%)\n", insn_name(sstats[i].insn), sstats[i].cnt_dynamic, (sstats[i].cnt_dynamic * 100.)/SD(all));
 
    printf("%d instructions (dynamic, single stats)\n", all);
    break;
 
  case 3:
    printf ("stats 3: Instruction dependencies\n");
    for(i = 0; i < DSTATS_LEN; i++) {
      all += dstats[i].cnt_dynamic;
      dependall += dstats[i].depend;
    }
 
    for(i = 0; i < DSTATS_LEN; i++)
      if (dstats[i].cnt_dynamic) {
        char temp[100];
        sprintf(temp, "%s, %s ", insn_name(dstats[i].insn1), insn_name(dstats[i].insn2));
        printf("  %-30s %6dx (%5.1f%%)", temp, dstats[i].cnt_dynamic, (dstats[i].cnt_dynamic * 100.)/SD(all));
        printf("   depend: %5.1f%%\n", (dstats[i].depend * 100.) / dstats[i].cnt_dynamic);
      }
 
    printf("%d instructions (dynamic, dependency stats)  depend: %d%%\n", all, (dependall * 100) / SD(all));
    break;
 
  case 4:
    printf("stats 4: Functional units dependencies\n");
    for(i = 0; i < FSTATS_LEN; i++) {
      all += fstats[i].cnt_dynamic;
      dependall += fstats[i].depend;
    }
 
    for(i = 0; i < FSTATS_LEN; i++)
      if (fstats[i].cnt_dynamic) {
        char temp[100];
        sprintf(temp, "%s, %s", func_unit_str[fstats[i].insn1], func_unit_str[fstats[i].insn2]);
        printf("  %-30s %6dx (%5.1f%%)", temp, fstats[i].cnt_dynamic, (fstats[i].cnt_dynamic * 100.)/SD(all));
        printf("   depend: %5.1f%%\n", (fstats[i].depend * 100.) / fstats[i].cnt_dynamic);
      }
    printf ("%d instructions (dynamic, functional units stats)  depend: %d%%\n\n", all, (dependall * 100) / SD(all));
    break;
 
  case 5:
    printf("stats 5: Raw register usage over time\n");
#if RAW_RANGE_STATS
    for(i = 0; (i < MAX_RANGE); i++)
      printf("  Register set and reused in %d. cycle: %d cases\n", i, raw_stats.range[i]);
#endif
    break;
  case 6:
    if (config.cpu.sbuf_len) {
      extern int sbuf_total_cyc, sbuf_wait_cyc;
      printf ("stats 6: Store buffer analysis\n");
      printf ("Using store buffer of length %i.\n", config.cpu.sbuf_len);
      printf ("Number of total memory store cycles: %i/%i\n", sbuf_total_cyc, runtime.sim.cycles + sbuf_total_cyc - sbuf_wait_cyc);
      printf ("Number of cycles waiting for memory stores: %i\n", sbuf_wait_cyc);
      printf ("Number of memory cycles spared: %i\n", sbuf_total_cyc - sbuf_wait_cyc);
      printf ("Store speedup %3.2f%%, total speedup %3.2f%%\n", 100.*(sbuf_total_cyc - sbuf_wait_cyc)/sbuf_total_cyc,
                                                                100.*(sbuf_total_cyc - sbuf_wait_cyc) / (runtime.sim.cycles + sbuf_total_cyc - sbuf_wait_cyc));
    } else
      printf ("Store buffer analysis disabled. Enable it to see analysis results.\n");
    break;
  default:
    printf ("Please specify a stats group (1-6).\n");
    break;
  }
  #if 0
    printf("Byte ADD: %d instructions\n", mstats.byteadd);
  #endif
}