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Line 28... |
#include <stdio.h>
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#include <stdio.h>
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#include <string.h>
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#include <string.h>
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#include <errno.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <stdarg.h>
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#include "config.h"
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#ifdef HAVE_INTTYPES_H
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#include <inttypes.h>
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#endif
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#include "port.h"
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#include "arch.h"
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#include "branch_predict.h"
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#include "branch_predict.h"
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#include "opcode/or32.h"
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#include "abstract.h"
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#include "abstract.h"
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#include "opcode/or32.h"
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#include "stats.h"
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#include "stats.h"
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#include "sim-config.h"
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#include "sim-config.h"
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/* Branch prediction buffer */
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/* Branch prediction buffer */
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Line 59... |
#define BPB_USTATES 2
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#define BPB_USTATES 2
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/* branch prediction buffer entry */
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/* branch prediction buffer entry */
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struct bpb_entry {
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struct bpb_entry {
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struct {
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struct {
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unsigned long addr; /* address of a branch insn */
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oraddr_t addr; /* address of a branch insn */
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int taken; /* taken == 1, not taken == 0 OR */
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int taken; /* taken == 1, not taken == 0 OR */
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/* strongly taken == 3, taken == 2,
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/* strongly taken == 3, taken == 2,
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not taken == 1, strongly not taken == 0 */
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not taken == 1, strongly not taken == 0 */
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int lru; /* least recently == 0 */
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int lru; /* least recently == 0 */
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} way[BPB_WAYS];
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} way[BPB_WAYS];
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Line 93... |
'taken' field with (BPB_PSTATES/2 - 1) + 'taken'
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'taken' field with (BPB_PSTATES/2 - 1) + 'taken'
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- set 'lru' with BPB_USTATES - 1 and decrement 'lru' of other
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- set 'lru' with BPB_USTATES - 1 and decrement 'lru' of other
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ways unless they have reached 0
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ways unless they have reached 0
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*/
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*/
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void bpb_update(unsigned long addr, int taken)
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void bpb_update(oraddr_t addr, int taken)
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{
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{
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int entry, way = -1;
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int entry, way = -1;
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int i;
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int i;
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/* BPB simulation enabled/disabled. */
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/* BPB simulation enabled/disabled. */
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Line 165... |
/* Target block size in bytes. */
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/* Target block size in bytes. */
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#define BTIC_BLOCKSIZE 4
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#define BTIC_BLOCKSIZE 4
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struct btic_entry {
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struct btic_entry {
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struct {
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struct {
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unsigned long addr; /* cached target address of a branch */
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oraddr_t addr; /* cached target address of a branch */
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int lru; /* least recently used */
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int lru; /* least recently used */
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char *insn; /* cached insn at target address (not used currently) */
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char *insn; /* cached insn at target address (not used currently) */
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} way[BTIC_WAYS];
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} way[BTIC_WAYS];
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} btic[BTIC_LEN];
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} btic[BTIC_LEN];
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Line 194... |
'insn' with NULL
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'insn' with NULL
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- set 'lru' with BTIC_USTATES - 1 and decrement 'lru' of other
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- set 'lru' with BTIC_USTATES - 1 and decrement 'lru' of other
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ways unless they have reached 0
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ways unless they have reached 0
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*/
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*/
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void btic_update(unsigned long targetaddr)
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void btic_update(oraddr_t targetaddr)
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{
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{
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int entry, way = -1;
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int entry, way = -1;
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int i;
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int i;
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/* BTIC simulation enabled/disabled. */
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/* BTIC simulation enabled/disabled. */
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