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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");

  {

    extern int loadcycles, storecycles;

    printf("Additional LOAD CYCLES: %u  STORE CYCLES: %u\n", loadcycles, 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");

    for(i = 0; (i < config.cpu.raw_range); i++)

      printf("  Register set and reused in %d. cycle: %d cases\n", i, raw_stats.range[i]);

    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, 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) / (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

}