mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
439 lines
8.1 KiB
C
439 lines
8.1 KiB
C
/* Support code for various pieces of CGEN simulators.
|
||
Copyright (C) 1996, 1997, 1998, 1999, 2007, 2008, 2009, 2010
|
||
Free Software Foundation, Inc.
|
||
Contributed by Cygnus Support.
|
||
|
||
This file is part of GDB, the GNU debugger.
|
||
|
||
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 "bfd.h"
|
||
#include "sim-main.h"
|
||
#include "dis-asm.h"
|
||
|
||
#define MEMOPS_DEFINE_INLINE
|
||
#include "cgen-mem.h"
|
||
|
||
#define SEMOPS_DEFINE_INLINE
|
||
#include "cgen-ops.h"
|
||
|
||
#undef min
|
||
#define min(a,b) ((a) < (b) ? (a) : (b))
|
||
|
||
const char *mode_names[] = {
|
||
"VOID",
|
||
"BI",
|
||
"QI",
|
||
"HI",
|
||
"SI",
|
||
"DI",
|
||
"UQI",
|
||
"UHI",
|
||
"USI",
|
||
"UDI",
|
||
"SF",
|
||
"DF",
|
||
"XF",
|
||
"TF",
|
||
0, /* MODE_TARGET_MAX */
|
||
"INT",
|
||
"UINT",
|
||
"PTR"
|
||
};
|
||
|
||
/* Opcode table for virtual insns used by the simulator. */
|
||
|
||
#define V CGEN_ATTR_MASK (CGEN_INSN_VIRTUAL)
|
||
|
||
static const CGEN_IBASE virtual_insn_entries[] =
|
||
{
|
||
{
|
||
VIRTUAL_INSN_X_INVALID, "--invalid--", NULL, 0, { V, { 0 } }
|
||
},
|
||
{
|
||
VIRTUAL_INSN_X_BEFORE, "--before--", NULL, 0, { V, { 0 } }
|
||
},
|
||
{
|
||
VIRTUAL_INSN_X_AFTER, "--after--", NULL, 0, { V, { 0 } }
|
||
},
|
||
{
|
||
VIRTUAL_INSN_X_BEGIN, "--begin--", NULL, 0, { V, { 0 } }
|
||
},
|
||
{
|
||
VIRTUAL_INSN_X_CHAIN, "--chain--", NULL, 0, { V, { 0 } }
|
||
},
|
||
{
|
||
VIRTUAL_INSN_X_CTI_CHAIN, "--cti-chain--", NULL, 0, { V, { 0 } }
|
||
}
|
||
};
|
||
|
||
#undef V
|
||
|
||
const CGEN_INSN cgen_virtual_insn_table[] =
|
||
{
|
||
{ & virtual_insn_entries[0] },
|
||
{ & virtual_insn_entries[1] },
|
||
{ & virtual_insn_entries[2] },
|
||
{ & virtual_insn_entries[3] },
|
||
{ & virtual_insn_entries[4] },
|
||
{ & virtual_insn_entries[5] }
|
||
};
|
||
|
||
/* Initialize cgen things.
|
||
This is called after sim_post_argv_init. */
|
||
|
||
void
|
||
cgen_init (SIM_DESC sd)
|
||
{
|
||
int i, c;
|
||
|
||
/* If no profiling or tracing has been enabled, run in fast mode. */
|
||
{
|
||
int run_fast_p = 1;
|
||
|
||
for (c = 0; c < MAX_NR_PROCESSORS; ++c)
|
||
{
|
||
SIM_CPU *cpu = STATE_CPU (sd, c);
|
||
|
||
for (i = 0; i < MAX_PROFILE_VALUES; ++i)
|
||
if (CPU_PROFILE_FLAGS (cpu) [i])
|
||
{
|
||
run_fast_p = 0;
|
||
break;
|
||
}
|
||
for (i = 0; i < MAX_TRACE_VALUES; ++i)
|
||
if (CPU_TRACE_FLAGS (cpu) [i])
|
||
{
|
||
run_fast_p = 0;
|
||
break;
|
||
}
|
||
if (! run_fast_p)
|
||
break;
|
||
}
|
||
STATE_RUN_FAST_P (sd) = run_fast_p;
|
||
}
|
||
}
|
||
|
||
/* Return the name of insn number I. */
|
||
|
||
const char *
|
||
cgen_insn_name (SIM_CPU *cpu, int i)
|
||
{
|
||
return CGEN_INSN_NAME ((* CPU_GET_IDATA (cpu)) ((cpu), (i)));
|
||
}
|
||
|
||
/* Return the maximum number of extra bytes required for a SIM_CPU struct. */
|
||
|
||
int
|
||
cgen_cpu_max_extra_bytes (void)
|
||
{
|
||
int i;
|
||
int extra = 0;
|
||
|
||
for (i = 0; sim_machs[i] != 0; ++i)
|
||
{
|
||
int size = IMP_PROPS_SIM_CPU_SIZE (MACH_IMP_PROPS (sim_machs[i]));
|
||
if (size > extra)
|
||
extra = size;
|
||
}
|
||
return extra;
|
||
}
|
||
|
||
#ifdef DI_FN_SUPPORT
|
||
|
||
DI
|
||
make_struct_di (hi, lo)
|
||
SI hi, lo;
|
||
{
|
||
DI result;
|
||
|
||
result.hi = hi;
|
||
result.lo = lo;
|
||
return result;
|
||
}
|
||
|
||
DI
|
||
ANDDI (a, b)
|
||
DI a, b;
|
||
{
|
||
SI ahi = GETHIDI (a);
|
||
SI alo = GETLODI (a);
|
||
SI bhi = GETHIDI (b);
|
||
SI blo = GETLODI (b);
|
||
return MAKEDI (ahi & bhi, alo & blo);
|
||
}
|
||
|
||
DI
|
||
ORDI (a, b)
|
||
DI a, b;
|
||
{
|
||
SI ahi = GETHIDI (a);
|
||
SI alo = GETLODI (a);
|
||
SI bhi = GETHIDI (b);
|
||
SI blo = GETLODI (b);
|
||
return MAKEDI (ahi | bhi, alo | blo);
|
||
}
|
||
|
||
DI
|
||
ADDDI (a, b)
|
||
DI a, b;
|
||
{
|
||
USI ahi = GETHIDI (a);
|
||
USI alo = GETLODI (a);
|
||
USI bhi = GETHIDI (b);
|
||
USI blo = GETLODI (b);
|
||
USI x = alo + blo;
|
||
return MAKEDI (ahi + bhi + (x < alo), x);
|
||
}
|
||
|
||
DI
|
||
MULDI (a, b)
|
||
DI a, b;
|
||
{
|
||
USI ahi = GETHIDI (a);
|
||
USI alo = GETLODI (a);
|
||
USI bhi = GETHIDI (b);
|
||
USI blo = GETLODI (b);
|
||
USI rhi,rlo;
|
||
USI x0, x1, x2, x3;
|
||
|
||
x0 = alo * blo;
|
||
x1 = alo * bhi;
|
||
x2 = ahi * blo;
|
||
x3 = ahi * bhi;
|
||
|
||
#define SI_TYPE_SIZE 32
|
||
#define BITS4 (SI_TYPE_SIZE / 4)
|
||
#define ll_B (1L << (SI_TYPE_SIZE / 2))
|
||
#define ll_lowpart(t) ((USI) (t) % ll_B)
|
||
#define ll_highpart(t) ((USI) (t) / ll_B)
|
||
x1 += ll_highpart (x0); /* this can't give carry */
|
||
x1 += x2; /* but this indeed can */
|
||
if (x1 < x2) /* did we get it? */
|
||
x3 += ll_B; /* yes, add it in the proper pos. */
|
||
|
||
rhi = x3 + ll_highpart (x1);
|
||
rlo = ll_lowpart (x1) * ll_B + ll_lowpart (x0);
|
||
return MAKEDI (rhi + (alo * bhi) + (ahi * blo), rlo);
|
||
}
|
||
|
||
DI
|
||
SHLDI (val, shift)
|
||
DI val;
|
||
SI shift;
|
||
{
|
||
USI hi = GETHIDI (val);
|
||
USI lo = GETLODI (val);
|
||
/* FIXME: Need to worry about shift < 0 || shift >= 32. */
|
||
return MAKEDI ((hi << shift) | (lo >> (32 - shift)), lo << shift);
|
||
}
|
||
|
||
DI
|
||
SLADI (val, shift)
|
||
DI val;
|
||
SI shift;
|
||
{
|
||
SI hi = GETHIDI (val);
|
||
USI lo = GETLODI (val);
|
||
/* FIXME: Need to worry about shift < 0 || shift >= 32. */
|
||
return MAKEDI ((hi << shift) | (lo >> (32 - shift)), lo << shift);
|
||
}
|
||
|
||
DI
|
||
SRADI (val, shift)
|
||
DI val;
|
||
SI shift;
|
||
{
|
||
SI hi = GETHIDI (val);
|
||
USI lo = GETLODI (val);
|
||
/* We use SRASI because the result is implementation defined if hi < 0. */
|
||
/* FIXME: Need to worry about shift < 0 || shift >= 32. */
|
||
return MAKEDI (SRASI (hi, shift), (hi << (32 - shift)) | (lo >> shift));
|
||
}
|
||
|
||
int
|
||
GEDI (a, b)
|
||
DI a, b;
|
||
{
|
||
SI ahi = GETHIDI (a);
|
||
USI alo = GETLODI (a);
|
||
SI bhi = GETHIDI (b);
|
||
USI blo = GETLODI (b);
|
||
if (ahi > bhi)
|
||
return 1;
|
||
if (ahi == bhi)
|
||
return alo >= blo;
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
LEDI (a, b)
|
||
DI a, b;
|
||
{
|
||
SI ahi = GETHIDI (a);
|
||
USI alo = GETLODI (a);
|
||
SI bhi = GETHIDI (b);
|
||
USI blo = GETLODI (b);
|
||
if (ahi < bhi)
|
||
return 1;
|
||
if (ahi == bhi)
|
||
return alo <= blo;
|
||
return 0;
|
||
}
|
||
|
||
DI
|
||
CONVHIDI (val)
|
||
HI val;
|
||
{
|
||
if (val < 0)
|
||
return MAKEDI (-1, val);
|
||
else
|
||
return MAKEDI (0, val);
|
||
}
|
||
|
||
DI
|
||
CONVSIDI (val)
|
||
SI val;
|
||
{
|
||
if (val < 0)
|
||
return MAKEDI (-1, val);
|
||
else
|
||
return MAKEDI (0, val);
|
||
}
|
||
|
||
SI
|
||
CONVDISI (val)
|
||
DI val;
|
||
{
|
||
return GETLODI (val);
|
||
}
|
||
|
||
#endif /* DI_FN_SUPPORT */
|
||
|
||
QI
|
||
RORQI (val, shift)
|
||
QI val;
|
||
int shift;
|
||
{
|
||
if (shift != 0)
|
||
{
|
||
int remain = 8 - shift;
|
||
int mask = (1 << shift) - 1;
|
||
QI result = (val & mask) << remain;
|
||
mask = (1 << remain) - 1;
|
||
result |= (val >> shift) & mask;
|
||
return result;
|
||
}
|
||
return val;
|
||
}
|
||
|
||
QI
|
||
ROLQI (val, shift)
|
||
QI val;
|
||
int shift;
|
||
{
|
||
if (shift != 0)
|
||
{
|
||
int remain = 8 - shift;
|
||
int mask = (1 << remain) - 1;
|
||
QI result = (val & mask) << shift;
|
||
mask = (1 << shift) - 1;
|
||
result |= (val >> remain) & mask;
|
||
return result;
|
||
}
|
||
return val;
|
||
}
|
||
|
||
HI
|
||
RORHI (val, shift)
|
||
HI val;
|
||
int shift;
|
||
{
|
||
if (shift != 0)
|
||
{
|
||
int remain = 16 - shift;
|
||
int mask = (1 << shift) - 1;
|
||
HI result = (val & mask) << remain;
|
||
mask = (1 << remain) - 1;
|
||
result |= (val >> shift) & mask;
|
||
return result;
|
||
}
|
||
return val;
|
||
}
|
||
|
||
HI
|
||
ROLHI (val, shift)
|
||
HI val;
|
||
int shift;
|
||
{
|
||
if (shift != 0)
|
||
{
|
||
int remain = 16 - shift;
|
||
int mask = (1 << remain) - 1;
|
||
HI result = (val & mask) << shift;
|
||
mask = (1 << shift) - 1;
|
||
result |= (val >> remain) & mask;
|
||
return result;
|
||
}
|
||
return val;
|
||
}
|
||
|
||
SI
|
||
RORSI (val, shift)
|
||
SI val;
|
||
int shift;
|
||
{
|
||
if (shift != 0)
|
||
{
|
||
int remain = 32 - shift;
|
||
int mask = (1 << shift) - 1;
|
||
SI result = (val & mask) << remain;
|
||
mask = (1 << remain) - 1;
|
||
result |= (val >> shift) & mask;
|
||
return result;
|
||
}
|
||
return val;
|
||
}
|
||
|
||
SI
|
||
ROLSI (val, shift)
|
||
SI val;
|
||
int shift;
|
||
{
|
||
if (shift != 0)
|
||
{
|
||
int remain = 32 - shift;
|
||
int mask = (1 << remain) - 1;
|
||
SI result = (val & mask) << shift;
|
||
mask = (1 << shift) - 1;
|
||
result |= (val >> remain) & mask;
|
||
return result;
|
||
}
|
||
|
||
return val;
|
||
}
|
||
|
||
/* Emit an error message from CGEN RTL. */
|
||
|
||
void
|
||
cgen_rtx_error (SIM_CPU *cpu, const char * msg)
|
||
{
|
||
SIM_DESC sd = CPU_STATE (cpu);
|
||
|
||
sim_io_printf (sd, msg);
|
||
sim_io_printf (sd, "\n");
|
||
|
||
sim_engine_halt (sd, cpu, NULL, CIA_GET (cpu), sim_stopped, SIM_SIGTRAP);
|
||
}
|