558 lines
11 KiB
C
558 lines
11 KiB
C
/* reg.c --- register set model for RX simulator.
|
|
|
|
Copyright (C) 2005-2016 Free Software Foundation, Inc.
|
|
Contributed by Red Hat, Inc.
|
|
|
|
This file is part of the GNU simulators.
|
|
|
|
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 3 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, see <http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
#include "config.h"
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "cpu.h"
|
|
#include "bfd.h"
|
|
#include "trace.h"
|
|
|
|
int verbose = 0;
|
|
int trace = 0;
|
|
int enable_counting = 0;
|
|
|
|
int rx_in_gdb = 1;
|
|
|
|
int rx_flagmask;
|
|
int rx_flagand;
|
|
int rx_flagor;
|
|
|
|
int rx_big_endian;
|
|
regs_type regs;
|
|
int step_result;
|
|
unsigned int heapbottom = 0;
|
|
unsigned int heaptop = 0;
|
|
|
|
char *reg_names[] = {
|
|
/* general registers */
|
|
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
|
|
"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
|
|
/* control register */
|
|
"psw", "pc", "usp", "fpsw", "RES", "RES", "RES", "RES",
|
|
"bpsw", "bpc", "isp", "fintv", "intb", "RES", "RES", "RES",
|
|
"RES", "RES", "RES", "RES", "RES", "RES", "RES", "RES",
|
|
"RES", "RES", "RES", "RES", "RES", "RES", "RES", "RES",
|
|
"temp", "acc", "acchi", "accmi", "acclo"
|
|
};
|
|
|
|
unsigned int b2mask[] = { 0, 0xff, 0xffff, 0xffffff, 0xffffffff };
|
|
unsigned int b2signbit[] = { 0, (1 << 7), (1 << 15), (1 << 24), (1 << 31) };
|
|
int b2maxsigned[] = { 0, 0x7f, 0x7fff, 0x7fffff, 0x7fffffff };
|
|
int b2minsigned[] = { 0, -128, -32768, -8388608, -2147483647 - 1 };
|
|
|
|
static regs_type oldregs;
|
|
|
|
void
|
|
init_regs (void)
|
|
{
|
|
memset (®s, 0, sizeof (regs));
|
|
memset (&oldregs, 0, sizeof (oldregs));
|
|
|
|
#ifdef CYCLE_ACCURATE
|
|
regs.rt = -1;
|
|
oldregs.rt = -1;
|
|
#endif
|
|
}
|
|
|
|
static unsigned int
|
|
get_reg_i (int id)
|
|
{
|
|
if (id == 0)
|
|
return regs.r_psw & FLAGBIT_U ? regs.r_usp : regs.r_isp;
|
|
|
|
if (id >= 1 && id <= 15)
|
|
return regs.r[id];
|
|
|
|
switch (id)
|
|
{
|
|
case psw:
|
|
return regs.r_psw;
|
|
case fpsw:
|
|
return regs.r_fpsw;
|
|
case isp:
|
|
return regs.r_isp;
|
|
case usp:
|
|
return regs.r_usp;
|
|
case bpc:
|
|
return regs.r_bpc;
|
|
case bpsw:
|
|
return regs.r_bpsw;
|
|
case fintv:
|
|
return regs.r_fintv;
|
|
case intb:
|
|
return regs.r_intb;
|
|
case pc:
|
|
return regs.r_pc;
|
|
case r_temp_idx:
|
|
return regs.r_temp;
|
|
case acchi:
|
|
return (SI)(regs.r_acc >> 32);
|
|
case accmi:
|
|
return (SI)(regs.r_acc >> 16);
|
|
case acclo:
|
|
return (SI)regs.r_acc;
|
|
}
|
|
abort();
|
|
}
|
|
|
|
unsigned int
|
|
get_reg (int id)
|
|
{
|
|
unsigned int rv = get_reg_i (id);
|
|
if (trace > ((id != pc && id != sp) ? 0 : 1))
|
|
printf ("get_reg (%s) = %08x\n", reg_names[id], rv);
|
|
return rv;
|
|
}
|
|
|
|
static unsigned long long
|
|
get_reg64_i (int id)
|
|
{
|
|
switch (id)
|
|
{
|
|
case acc64:
|
|
return regs.r_acc;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
unsigned long long
|
|
get_reg64 (int id)
|
|
{
|
|
unsigned long long rv = get_reg64_i (id);
|
|
if (trace > ((id != pc && id != sp) ? 0 : 1))
|
|
printf ("get_reg (%s) = %016llx\n", reg_names[id], rv);
|
|
return rv;
|
|
}
|
|
|
|
static int highest_sp = 0, lowest_sp = 0xffffff;
|
|
|
|
void
|
|
stack_heap_stats ()
|
|
{
|
|
if (heapbottom < heaptop)
|
|
printf ("heap: %08x - %08x (%d bytes)\n", heapbottom, heaptop,
|
|
heaptop - heapbottom);
|
|
if (lowest_sp < highest_sp)
|
|
printf ("stack: %08x - %08x (%d bytes)\n", lowest_sp, highest_sp,
|
|
highest_sp - lowest_sp);
|
|
}
|
|
|
|
void
|
|
put_reg (int id, unsigned int v)
|
|
{
|
|
if (trace > ((id != pc) ? 0 : 1))
|
|
printf ("put_reg (%s) = %08x\n", reg_names[id], v);
|
|
|
|
|
|
switch (id)
|
|
{
|
|
case psw:
|
|
regs.r_psw = v;
|
|
break;
|
|
case fpsw:
|
|
{
|
|
SI anded;
|
|
/* This is an odd one - The Cx flags are AND'd, and the FS flag
|
|
is synthetic. */
|
|
anded = regs.r_fpsw & v;
|
|
anded |= ~ FPSWBITS_CMASK;
|
|
regs.r_fpsw = v & anded;
|
|
if (regs.r_fpsw & FPSWBITS_FMASK)
|
|
regs.r_fpsw |= FPSWBITS_FSUM;
|
|
else
|
|
regs.r_fpsw &= ~FPSWBITS_FSUM;
|
|
}
|
|
break;
|
|
case isp:
|
|
regs.r_isp = v;
|
|
break;
|
|
case usp:
|
|
regs.r_usp = v;
|
|
break;
|
|
case bpc:
|
|
regs.r_bpc = v;
|
|
break;
|
|
case bpsw:
|
|
regs.r_bpsw = v;
|
|
break;
|
|
case fintv:
|
|
regs.r_fintv = v;
|
|
break;
|
|
case intb:
|
|
regs.r_intb = v;
|
|
break;
|
|
case pc:
|
|
regs.r_pc = v;
|
|
break;
|
|
|
|
case acchi:
|
|
regs.r_acc = (regs.r_acc & 0xffffffffULL) | ((DI)v << 32);
|
|
break;
|
|
case accmi:
|
|
regs.r_acc = (regs.r_acc & ~0xffffffff0000ULL) | ((DI)v << 16);
|
|
break;
|
|
case acclo:
|
|
regs.r_acc = (regs.r_acc & ~0xffffffffULL) | ((DI)v);
|
|
break;
|
|
|
|
case 0: /* Stack pointer is "in" R0. */
|
|
{
|
|
if (v < heaptop)
|
|
{
|
|
unsigned int line;
|
|
const char * dummy;
|
|
const char * fname = NULL;
|
|
|
|
sim_get_current_source_location (& dummy, & fname, &line);
|
|
|
|
/* The setjmp and longjmp functions play tricks with the stack pointer. */
|
|
if (fname == NULL
|
|
|| (strcmp (fname, "_setjmp") != 0
|
|
&& strcmp (fname, "_longjmp") != 0))
|
|
{
|
|
printf ("collision in %s: pc %08x heap %08x stack %08x\n",
|
|
fname, (unsigned int) regs.r_pc, heaptop, v);
|
|
exit (1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (v < lowest_sp)
|
|
lowest_sp = v;
|
|
if (v > highest_sp)
|
|
highest_sp = v;
|
|
}
|
|
|
|
if (regs.r_psw & FLAGBIT_U)
|
|
regs.r_usp = v;
|
|
else
|
|
regs.r_isp = v;
|
|
break;
|
|
}
|
|
|
|
default:
|
|
if (id >= 1 && id <= 15)
|
|
regs.r[id] = v;
|
|
else
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
void
|
|
put_reg64 (int id, unsigned long long v)
|
|
{
|
|
if (trace > ((id != pc) ? 0 : 1))
|
|
printf ("put_reg (%s) = %016llx\n", reg_names[id], v);
|
|
|
|
switch (id)
|
|
{
|
|
case acc64:
|
|
regs.r_acc = v;
|
|
break;
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
|
|
int
|
|
condition_true (int cond_id)
|
|
{
|
|
int f;
|
|
|
|
static const char *cond_name[] = {
|
|
"Z",
|
|
"!Z",
|
|
"C",
|
|
"!C",
|
|
"C&!Z",
|
|
"!(C&!Z)",
|
|
"!S",
|
|
"S",
|
|
"!(S^O)",
|
|
"S^O",
|
|
"!((S^O)|Z)",
|
|
"(S^O)|Z",
|
|
"O",
|
|
"!O",
|
|
"always",
|
|
"never"
|
|
};
|
|
switch (cond_id & 15)
|
|
{
|
|
case 0:
|
|
f = FLAG_Z;
|
|
break; /* EQ/Z */
|
|
case 1:
|
|
f = !FLAG_Z;
|
|
break; /* NE/NZ */
|
|
case 2:
|
|
f = FLAG_C;
|
|
break; /* GEU/C */
|
|
case 3:
|
|
f = !FLAG_C;
|
|
break; /* LTU/NC */
|
|
case 4:
|
|
f = FLAG_C & !FLAG_Z;
|
|
break; /* GTU */
|
|
case 5:
|
|
f = !(FLAG_C & !FLAG_Z);
|
|
break; /* LEU */
|
|
case 6:
|
|
f = !FLAG_S;
|
|
break; /* PZ */
|
|
case 7:
|
|
f = FLAG_S;
|
|
break; /* N */
|
|
|
|
case 8:
|
|
f = !(FLAG_S ^ FLAG_O);
|
|
break; /* GE */
|
|
case 9:
|
|
f = FLAG_S ^ FLAG_O;
|
|
break; /* LT */
|
|
case 10:
|
|
f = !((FLAG_S ^ FLAG_O) | FLAG_Z);
|
|
break; /* GT */
|
|
case 11:
|
|
f = (FLAG_S ^ FLAG_O) | FLAG_Z;
|
|
break; /* LE */
|
|
case 12:
|
|
f = FLAG_O;
|
|
break; /* O */
|
|
case 13:
|
|
f = !FLAG_O;
|
|
break; /* NO */
|
|
case 14:
|
|
f = 1; /* always */
|
|
break;
|
|
default:
|
|
f = 0; /* never */
|
|
break;
|
|
}
|
|
if (trace && ((cond_id & 15) != 14))
|
|
printf ("cond[%d] %s = %s\n", cond_id, cond_name[cond_id & 15],
|
|
f ? "true" : "false");
|
|
return f;
|
|
}
|
|
|
|
void
|
|
set_flags (int mask, int newbits)
|
|
{
|
|
regs.r_psw &= rx_flagand;
|
|
regs.r_psw |= rx_flagor;
|
|
regs.r_psw |= (newbits & mask & rx_flagmask);
|
|
|
|
if (trace)
|
|
{
|
|
int i;
|
|
printf ("flags now \033[32m %d", (int)((regs.r_psw >> 24) & 7));
|
|
for (i = 17; i >= 0; i--)
|
|
if (0x3000f & (1 << i))
|
|
{
|
|
if (regs.r_psw & (1 << i))
|
|
putchar ("CZSO------------IU"[i]);
|
|
else
|
|
putchar ('-');
|
|
}
|
|
printf ("\033[0m\n");
|
|
}
|
|
}
|
|
|
|
void
|
|
set_oszc (long long value, int b, int c)
|
|
{
|
|
unsigned int mask = b2mask[b];
|
|
int f = 0;
|
|
|
|
if (c)
|
|
f |= FLAGBIT_C;
|
|
if ((value & mask) == 0)
|
|
f |= FLAGBIT_Z;
|
|
if (value & b2signbit[b])
|
|
f |= FLAGBIT_S;
|
|
if ((value > b2maxsigned[b]) || (value < b2minsigned[b]))
|
|
f |= FLAGBIT_O;
|
|
set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_O | FLAGBIT_C, f);
|
|
}
|
|
|
|
void
|
|
set_szc (long long value, int b, int c)
|
|
{
|
|
unsigned int mask = b2mask[b];
|
|
int f = 0;
|
|
|
|
if (c)
|
|
f |= FLAGBIT_C;
|
|
if ((value & mask) == 0)
|
|
f |= FLAGBIT_Z;
|
|
if (value & b2signbit[b])
|
|
f |= FLAGBIT_S;
|
|
set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_C, f);
|
|
}
|
|
|
|
void
|
|
set_osz (long long value, int b)
|
|
{
|
|
unsigned int mask = b2mask[b];
|
|
int f = 0;
|
|
|
|
if ((value & mask) == 0)
|
|
f |= FLAGBIT_Z;
|
|
if (value & b2signbit[b])
|
|
f |= FLAGBIT_S;
|
|
if ((value > b2maxsigned[b]) || (value < b2minsigned[b]))
|
|
f |= FLAGBIT_O;
|
|
set_flags (FLAGBIT_Z | FLAGBIT_S | FLAGBIT_O, f);
|
|
}
|
|
|
|
void
|
|
set_sz (long long value, int b)
|
|
{
|
|
unsigned int mask = b2mask[b];
|
|
int f = 0;
|
|
|
|
if ((value & mask) == 0)
|
|
f |= FLAGBIT_Z;
|
|
if (value & b2signbit[b])
|
|
f |= FLAGBIT_S;
|
|
set_flags (FLAGBIT_Z | FLAGBIT_S, f);
|
|
}
|
|
|
|
void
|
|
set_zc (int z, int c)
|
|
{
|
|
set_flags (FLAGBIT_C | FLAGBIT_Z,
|
|
(c ? FLAGBIT_C : 0) | (z ? FLAGBIT_Z : 0));
|
|
}
|
|
|
|
void
|
|
set_c (int c)
|
|
{
|
|
set_flags (FLAGBIT_C, c ? FLAGBIT_C : 0);
|
|
}
|
|
|
|
static char *
|
|
psw2str(int rpsw)
|
|
{
|
|
static char buf[10];
|
|
char *bp = buf;
|
|
int i, ipl;
|
|
|
|
ipl = (rpsw & FLAGBITS_IPL) >> FLAGSHIFT_IPL;
|
|
if (ipl > 9)
|
|
{
|
|
*bp++ = (ipl / 10) + '0';
|
|
ipl %= 10;
|
|
}
|
|
*bp++ = ipl + '0';
|
|
for (i = 20; i >= 0; i--)
|
|
if (0x13000f & (1 << i))
|
|
{
|
|
if (rpsw & (1 << i))
|
|
*bp++ = "CZSO------------IU--P"[i];
|
|
else
|
|
*bp++ = '-';
|
|
}
|
|
*bp = 0;
|
|
return buf;
|
|
}
|
|
|
|
static char *
|
|
fpsw2str(int rpsw)
|
|
{
|
|
static char buf[100];
|
|
char *bp = buf;
|
|
int i; /* ---+---+---+---+---+---+---+---+ */
|
|
const char s1[] = "FFFFFF-----------EEEEE-DCCCCCCRR";
|
|
const char s2[] = "SXUZOV-----------XUZOV-NEXUZOV01";
|
|
const char rm[4][3] = { "RC", "RZ", "RP", "RN" };
|
|
|
|
for (i = 31; i >= 0; i--)
|
|
if (0xfc007dfc & (1 << i))
|
|
{
|
|
if (rpsw & (1 << i))
|
|
{
|
|
if (bp > buf)
|
|
*bp++ = '.';
|
|
*bp++ = s1[31-i];
|
|
*bp++ = s2[31-i];
|
|
}
|
|
}
|
|
if (bp > buf)
|
|
*bp++ = '.';
|
|
strcpy (bp, rm[rpsw&3]);
|
|
return buf;
|
|
}
|
|
|
|
#define TRC(f,n) \
|
|
if (oldregs.f != regs.f) \
|
|
{ \
|
|
if (tag) { printf (tag); tag = 0; } \
|
|
printf(" %s %08x:%08x", n, \
|
|
(unsigned int)oldregs.f, \
|
|
(unsigned int)regs.f); \
|
|
oldregs.f = regs.f; \
|
|
}
|
|
|
|
void
|
|
trace_register_changes (void)
|
|
{
|
|
char *tag = "\033[36mREGS:";
|
|
int i;
|
|
|
|
if (!trace)
|
|
return;
|
|
for (i=1; i<16; i++)
|
|
TRC (r[i], reg_names[i]);
|
|
TRC (r_intb, "intb");
|
|
TRC (r_usp, "usp");
|
|
TRC (r_isp, "isp");
|
|
if (oldregs.r_psw != regs.r_psw)
|
|
{
|
|
if (tag) { printf (tag); tag = 0; }
|
|
printf(" psw %s:", psw2str(oldregs.r_psw));
|
|
printf("%s", psw2str(regs.r_psw));
|
|
oldregs.r_psw = regs.r_psw;
|
|
}
|
|
|
|
if (oldregs.r_fpsw != regs.r_fpsw)
|
|
{
|
|
if (tag) { printf (tag); tag = 0; }
|
|
printf(" fpsw %s:", fpsw2str(oldregs.r_fpsw));
|
|
printf("%s", fpsw2str(regs.r_fpsw));
|
|
oldregs.r_fpsw = regs.r_fpsw;
|
|
}
|
|
|
|
if (oldregs.r_acc != regs.r_acc)
|
|
{
|
|
if (tag) { printf (tag); tag = 0; }
|
|
printf(" acc %016llx:", oldregs.r_acc);
|
|
printf("%016llx", regs.r_acc);
|
|
oldregs.r_acc = regs.r_acc;
|
|
}
|
|
|
|
if (tag == 0)
|
|
printf ("\033[0m\n");
|
|
}
|