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binutils-gdb/sim/arm/maverick.c
Joel Brobecker dc3cf14f35 Update copyright notices to add year 2010.
2010-01-01 10:03:36 +00:00

1291 lines
30 KiB
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/* maverick.c -- Cirrus/DSP co-processor interface.
Copyright (C) 2003, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
Contributed by Aldy Hernandez (aldyh@redhat.com).
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 <assert.h>
#include "armdefs.h"
#include "ansidecl.h"
#include "armemu.h"
/*#define CIRRUS_DEBUG 1 /**/
#if CIRRUS_DEBUG
# define printfdbg printf
#else
# define printfdbg printf_nothing
#endif
#define POS64(i) ( (~(i)) >> 63 )
#define NEG64(i) ( (i) >> 63 )
/* Define Co-Processor instruction handlers here. */
/* Here's ARMulator's DSP definition. A few things to note:
1) it has 16 64-bit registers and 4 72-bit accumulators
2) you can only access its registers with MCR and MRC. */
/* We can't define these in here because this file might not be linked
unless the target is arm9e-*. They are defined in wrapper.c.
Eventually the simulator should be made to handle any coprocessor
at run time. */
struct maverick_regs
{
union
{
int i;
float f;
} upper;
union
{
int i;
float f;
} lower;
};
union maverick_acc_regs
{
long double ld; /* Acc registers are 72-bits. */
};
struct maverick_regs DSPregs[16];
union maverick_acc_regs DSPacc[4];
ARMword DSPsc;
#define DEST_REG (BITS (12, 15))
#define SRC1_REG (BITS (16, 19))
#define SRC2_REG (BITS (0, 3))
static int lsw_int_index, msw_int_index;
static int lsw_float_index, msw_float_index;
static double mv_getRegDouble (int);
static long long mv_getReg64int (int);
static void mv_setRegDouble (int, double val);
static void mv_setReg64int (int, long long val);
static union
{
double d;
long long ll;
int ints[2];
} reg_conv;
static void
printf_nothing (void * foo, ...)
{
}
static void
cirrus_not_implemented (char * insn)
{
fprintf (stderr, "Cirrus instruction '%s' not implemented.\n", insn);
fprintf (stderr, "aborting!\n");
exit (1);
}
static unsigned
DSPInit (ARMul_State * state)
{
ARMul_ConsolePrint (state, ", DSP present");
return TRUE;
}
unsigned
DSPMRC4 (ARMul_State * state ATTRIBUTE_UNUSED,
unsigned type ATTRIBUTE_UNUSED,
ARMword instr,
ARMword * value)
{
switch (BITS (5, 7))
{
case 0: /* cfmvrdl */
/* Move lower half of a DF stored in a DSP reg into an Arm reg. */
printfdbg ("cfmvrdl\n");
printfdbg ("\tlower half=0x%x\n", DSPregs[SRC1_REG].lower.i);
printfdbg ("\tentire thing=%g\n", mv_getRegDouble (SRC1_REG));
*value = (ARMword) DSPregs[SRC1_REG].lower.i;
break;
case 1: /* cfmvrdh */
/* Move upper half of a DF stored in a DSP reg into an Arm reg. */
printfdbg ("cfmvrdh\n");
printfdbg ("\tupper half=0x%x\n", DSPregs[SRC1_REG].upper.i);
printfdbg ("\tentire thing=%g\n", mv_getRegDouble (SRC1_REG));
*value = (ARMword) DSPregs[SRC1_REG].upper.i;
break;
case 2: /* cfmvrs */
/* Move SF from upper half of a DSP register to an Arm register. */
*value = (ARMword) DSPregs[SRC1_REG].upper.i;
printfdbg ("cfmvrs = mvf%d <-- %f\n",
SRC1_REG,
DSPregs[SRC1_REG].upper.f);
break;
#ifdef doesnt_work
case 4: /* cfcmps */
{
float a, b;
int n, z, c, v;
a = DSPregs[SRC1_REG].upper.f;
b = DSPregs[SRC2_REG].upper.f;
printfdbg ("cfcmps\n");
printfdbg ("\tcomparing %f and %f\n", a, b);
z = a == b; /* zero */
n = a != b; /* negative */
v = a > b; /* overflow */
c = 0; /* carry */
*value = (n << 31) | (z << 30) | (c << 29) | (v << 28);
break;
}
case 5: /* cfcmpd */
{
double a, b;
int n, z, c, v;
a = mv_getRegDouble (SRC1_REG);
b = mv_getRegDouble (SRC2_REG);
printfdbg ("cfcmpd\n");
printfdbg ("\tcomparing %g and %g\n", a, b);
z = a == b; /* zero */
n = a != b; /* negative */
v = a > b; /* overflow */
c = 0; /* carry */
*value = (n << 31) | (z << 30) | (c << 29) | (v << 28);
break;
}
#else
case 4: /* cfcmps */
{
float a, b;
int n, z, c, v;
a = DSPregs[SRC1_REG].upper.f;
b = DSPregs[SRC2_REG].upper.f;
printfdbg ("cfcmps\n");
printfdbg ("\tcomparing %f and %f\n", a, b);
z = a == b; /* zero */
n = a < b; /* negative */
c = a > b; /* carry */
v = 0; /* fixme */
printfdbg ("\tz = %d, n = %d\n", z, n);
*value = (n << 31) | (z << 30) | (c << 29) | (v << 28);
break;
}
case 5: /* cfcmpd */
{
double a, b;
int n, z, c, v;
a = mv_getRegDouble (SRC1_REG);
b = mv_getRegDouble (SRC2_REG);
printfdbg ("cfcmpd\n");
printfdbg ("\tcomparing %g and %g\n", a, b);
z = a == b; /* zero */
n = a < b; /* negative */
c = a > b; /* carry */
v = 0; /* fixme */
*value = (n << 31) | (z << 30) | (c << 29) | (v << 28);
break;
}
#endif
default:
fprintf (stderr, "unknown opcode in DSPMRC4 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPMRC5 (ARMul_State * state ATTRIBUTE_UNUSED,
unsigned type ATTRIBUTE_UNUSED,
ARMword instr,
ARMword * value)
{
switch (BITS (5, 7))
{
case 0: /* cfmvr64l */
/* Move lower half of 64bit int from Cirrus to Arm. */
*value = (ARMword) DSPregs[SRC1_REG].lower.i;
printfdbg ("cfmvr64l ARM_REG = mvfx%d <-- %d\n",
DEST_REG,
(int) *value);
break;
case 1: /* cfmvr64h */
/* Move upper half of 64bit int from Cirrus to Arm. */
*value = (ARMword) DSPregs[SRC1_REG].upper.i;
printfdbg ("cfmvr64h <-- %d\n", (int) *value);
break;
case 4: /* cfcmp32 */
{
int res;
int n, z, c, v;
unsigned int a, b;
printfdbg ("cfcmp32 mvfx%d - mvfx%d\n",
SRC1_REG,
SRC2_REG);
/* FIXME: see comment for cfcmps. */
a = DSPregs[SRC1_REG].lower.i;
b = DSPregs[SRC2_REG].lower.i;
res = DSPregs[SRC1_REG].lower.i - DSPregs[SRC2_REG].lower.i;
/* zero */
z = res == 0;
/* negative */
n = res < 0;
/* overflow */
v = SubOverflow (DSPregs[SRC1_REG].lower.i, DSPregs[SRC2_REG].lower.i,
res);
/* carry */
c = (NEG (a) && POS (b) ||
(NEG (a) && POS (res)) || (POS (b) && POS (res)));
*value = (n << 31) | (z << 30) | (c << 29) | (v << 28);
break;
}
case 5: /* cfcmp64 */
{
long long res;
int n, z, c, v;
unsigned long long a, b;
printfdbg ("cfcmp64 mvdx%d - mvdx%d\n",
SRC1_REG,
SRC2_REG);
/* fixme: see comment for cfcmps. */
a = mv_getReg64int (SRC1_REG);
b = mv_getReg64int (SRC2_REG);
res = mv_getReg64int (SRC1_REG) - mv_getReg64int (SRC2_REG);
/* zero */
z = res == 0;
/* negative */
n = res < 0;
/* overflow */
v = ((NEG64 (a) && POS64 (b) && POS64 (res))
|| (POS64 (a) && NEG64 (b) && NEG64 (res)));
/* carry */
c = (NEG64 (a) && POS64 (b) ||
(NEG64 (a) && POS64 (res)) || (POS64 (b) && POS64 (res)));
*value = (n << 31) | (z << 30) | (c << 29) | (v << 28);
break;
}
default:
fprintf (stderr, "unknown opcode in DSPMRC5 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPMRC6 (ARMul_State * state ATTRIBUTE_UNUSED,
unsigned type ATTRIBUTE_UNUSED,
ARMword instr,
ARMword * value)
{
switch (BITS (5, 7))
{
case 0: /* cfmval32 */
cirrus_not_implemented ("cfmval32");
break;
case 1: /* cfmvam32 */
cirrus_not_implemented ("cfmvam32");
break;
case 2: /* cfmvah32 */
cirrus_not_implemented ("cfmvah32");
break;
case 3: /* cfmva32 */
cirrus_not_implemented ("cfmva32");
break;
case 4: /* cfmva64 */
cirrus_not_implemented ("cfmva64");
break;
case 5: /* cfmvsc32 */
cirrus_not_implemented ("cfmvsc32");
break;
default:
fprintf (stderr, "unknown opcode in DSPMRC6 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPMCR4 (ARMul_State * state,
unsigned type ATTRIBUTE_UNUSED,
ARMword instr,
ARMword value)
{
switch (BITS (5, 7))
{
case 0: /* cfmvdlr */
/* Move the lower half of a DF value from an Arm register into
the lower half of a Cirrus register. */
printfdbg ("cfmvdlr <-- 0x%x\n", (int) value);
DSPregs[SRC1_REG].lower.i = (int) value;
break;
case 1: /* cfmvdhr */
/* Move the upper half of a DF value from an Arm register into
the upper half of a Cirrus register. */
printfdbg ("cfmvdhr <-- 0x%x\n", (int) value);
DSPregs[SRC1_REG].upper.i = (int) value;
break;
case 2: /* cfmvsr */
/* Move SF from Arm register into upper half of Cirrus register. */
printfdbg ("cfmvsr <-- 0x%x\n", (int) value);
DSPregs[SRC1_REG].upper.i = (int) value;
break;
default:
fprintf (stderr, "unknown opcode in DSPMCR4 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPMCR5 (ARMul_State * state,
unsigned type ATTRIBUTE_UNUSED,
ARMword instr,
ARMword value)
{
union
{
int s;
unsigned int us;
} val;
switch (BITS (5, 7))
{
case 0: /* cfmv64lr */
/* Move lower half of a 64bit int from an ARM register into the
lower half of a DSP register and sign extend it. */
printfdbg ("cfmv64lr mvdx%d <-- 0x%x\n", SRC1_REG, (int) value);
DSPregs[SRC1_REG].lower.i = (int) value;
break;
case 1: /* cfmv64hr */
/* Move upper half of a 64bit int from an ARM register into the
upper half of a DSP register. */
printfdbg ("cfmv64hr ARM_REG = mvfx%d <-- 0x%x\n",
SRC1_REG,
(int) value);
DSPregs[SRC1_REG].upper.i = (int) value;
break;
case 2: /* cfrshl32 */
printfdbg ("cfrshl32\n");
val.us = value;
if (val.s > 0)
DSPregs[SRC2_REG].lower.i = DSPregs[SRC1_REG].lower.i << value;
else
DSPregs[SRC2_REG].lower.i = DSPregs[SRC1_REG].lower.i >> -value;
break;
case 3: /* cfrshl64 */
printfdbg ("cfrshl64\n");
val.us = value;
if (val.s > 0)
mv_setReg64int (SRC2_REG, mv_getReg64int (SRC1_REG) << value);
else
mv_setReg64int (SRC2_REG, mv_getReg64int (SRC1_REG) >> -value);
break;
default:
fprintf (stderr, "unknown opcode in DSPMCR5 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPMCR6 (ARMul_State * state,
unsigned type ATTRIBUTE_UNUSED,
ARMword instr,
ARMword value)
{
switch (BITS (5, 7))
{
case 0: /* cfmv32al */
cirrus_not_implemented ("cfmv32al");
break;
case 1: /* cfmv32am */
cirrus_not_implemented ("cfmv32am");
break;
case 2: /* cfmv32ah */
cirrus_not_implemented ("cfmv32ah");
break;
case 3: /* cfmv32a */
cirrus_not_implemented ("cfmv32a");
break;
case 4: /* cfmv64a */
cirrus_not_implemented ("cfmv64a");
break;
case 5: /* cfmv32sc */
cirrus_not_implemented ("cfmv32sc");
break;
default:
fprintf (stderr, "unknown opcode in DSPMCR6 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPLDC4 (ARMul_State * state ATTRIBUTE_UNUSED,
unsigned type,
ARMword instr,
ARMword data)
{
static unsigned words;
if (type != ARMul_DATA)
{
words = 0;
return ARMul_DONE;
}
if (BIT (22))
{ /* it's a long access, get two words */
/* cfldrd */
printfdbg ("cfldrd: %x (words = %d) (bigend = %d) DESTREG = %d\n",
data, words, state->bigendSig, DEST_REG);
if (words == 0)
{
if (state->bigendSig)
DSPregs[DEST_REG].upper.i = (int) data;
else
DSPregs[DEST_REG].lower.i = (int) data;
}
else
{
if (state->bigendSig)
DSPregs[DEST_REG].lower.i = (int) data;
else
DSPregs[DEST_REG].upper.i = (int) data;
}
++ words;
if (words == 2)
{
printfdbg ("\tmvd%d <-- mem = %g\n", DEST_REG,
mv_getRegDouble (DEST_REG));
return ARMul_DONE;
}
else
return ARMul_INC;
}
else
{
/* Get just one word. */
/* cfldrs */
printfdbg ("cfldrs\n");
DSPregs[DEST_REG].upper.i = (int) data;
printfdbg ("\tmvf%d <-- mem = %f\n", DEST_REG,
DSPregs[DEST_REG].upper.f);
return ARMul_DONE;
}
}
unsigned
DSPLDC5 (ARMul_State * state ATTRIBUTE_UNUSED,
unsigned type,
ARMword instr,
ARMword data)
{
static unsigned words;
if (type != ARMul_DATA)
{
words = 0;
return ARMul_DONE;
}
if (BIT (22))
{
/* It's a long access, get two words. */
/* cfldr64 */
printfdbg ("cfldr64: %d\n", data);
if (words == 0)
{
if (state->bigendSig)
DSPregs[DEST_REG].upper.i = (int) data;
else
DSPregs[DEST_REG].lower.i = (int) data;
}
else
{
if (state->bigendSig)
DSPregs[DEST_REG].lower.i = (int) data;
else
DSPregs[DEST_REG].upper.i = (int) data;
}
++ words;
if (words == 2)
{
printfdbg ("\tmvdx%d <-- mem = %lld\n", DEST_REG,
mv_getReg64int (DEST_REG));
return ARMul_DONE;
}
else
return ARMul_INC;
}
else
{
/* Get just one word. */
/* cfldr32 */
printfdbg ("cfldr32 mvfx%d <-- %d\n", DEST_REG, (int) data);
/* 32bit ints should be sign extended to 64bits when loaded. */
mv_setReg64int (DEST_REG, (long long) data);
return ARMul_DONE;
}
}
unsigned
DSPSTC4 (ARMul_State * state ATTRIBUTE_UNUSED,
unsigned type,
ARMword instr,
ARMword * data)
{
static unsigned words;
if (type != ARMul_DATA)
{
words = 0;
return ARMul_DONE;
}
if (BIT (22))
{
/* It's a long access, get two words. */
/* cfstrd */
printfdbg ("cfstrd\n");
if (words == 0)
{
if (state->bigendSig)
*data = (ARMword) DSPregs[DEST_REG].upper.i;
else
*data = (ARMword) DSPregs[DEST_REG].lower.i;
}
else
{
if (state->bigendSig)
*data = (ARMword) DSPregs[DEST_REG].lower.i;
else
*data = (ARMword) DSPregs[DEST_REG].upper.i;
}
++ words;
if (words == 2)
{
printfdbg ("\tmem = mvd%d = %g\n", DEST_REG,
mv_getRegDouble (DEST_REG));
return ARMul_DONE;
}
else
return ARMul_INC;
}
else
{
/* Get just one word. */
/* cfstrs */
printfdbg ("cfstrs mvf%d <-- %f\n", DEST_REG,
DSPregs[DEST_REG].upper.f);
*data = (ARMword) DSPregs[DEST_REG].upper.i;
return ARMul_DONE;
}
}
unsigned
DSPSTC5 (ARMul_State * state ATTRIBUTE_UNUSED,
unsigned type,
ARMword instr,
ARMword * data)
{
static unsigned words;
if (type != ARMul_DATA)
{
words = 0;
return ARMul_DONE;
}
if (BIT (22))
{
/* It's a long access, store two words. */
/* cfstr64 */
printfdbg ("cfstr64\n");
if (words == 0)
{
if (state->bigendSig)
*data = (ARMword) DSPregs[DEST_REG].upper.i;
else
*data = (ARMword) DSPregs[DEST_REG].lower.i;
}
else
{
if (state->bigendSig)
*data = (ARMword) DSPregs[DEST_REG].lower.i;
else
*data = (ARMword) DSPregs[DEST_REG].upper.i;
}
++ words;
if (words == 2)
{
printfdbg ("\tmem = mvd%d = %lld\n", DEST_REG,
mv_getReg64int (DEST_REG));
return ARMul_DONE;
}
else
return ARMul_INC;
}
else
{
/* Store just one word. */
/* cfstr32 */
*data = (ARMword) DSPregs[DEST_REG].lower.i;
printfdbg ("cfstr32 MEM = %d\n", (int) *data);
return ARMul_DONE;
}
}
unsigned
DSPCDP4 (ARMul_State * state,
unsigned type,
ARMword instr)
{
int opcode2;
opcode2 = BITS (5,7);
switch (BITS (20,21))
{
case 0:
switch (opcode2)
{
case 0: /* cfcpys */
printfdbg ("cfcpys mvf%d = mvf%d = %f\n",
DEST_REG,
SRC1_REG,
DSPregs[SRC1_REG].upper.f);
DSPregs[DEST_REG].upper.f = DSPregs[SRC1_REG].upper.f;
break;
case 1: /* cfcpyd */
printfdbg ("cfcpyd mvd%d = mvd%d = %g\n",
DEST_REG,
SRC1_REG,
mv_getRegDouble (SRC1_REG));
mv_setRegDouble (DEST_REG, mv_getRegDouble (SRC1_REG));
break;
case 2: /* cfcvtds */
printfdbg ("cfcvtds mvf%d = (float) mvd%d = %f\n",
DEST_REG,
SRC1_REG,
(float) mv_getRegDouble (SRC1_REG));
DSPregs[DEST_REG].upper.f = (float) mv_getRegDouble (SRC1_REG);
break;
case 3: /* cfcvtsd */
printfdbg ("cfcvtsd mvd%d = mvf%d = %g\n",
DEST_REG,
SRC1_REG,
(double) DSPregs[SRC1_REG].upper.f);
mv_setRegDouble (DEST_REG, (double) DSPregs[SRC1_REG].upper.f);
break;
case 4: /* cfcvt32s */
printfdbg ("cfcvt32s mvf%d = mvfx%d = %f\n",
DEST_REG,
SRC1_REG,
(float) DSPregs[SRC1_REG].lower.i);
DSPregs[DEST_REG].upper.f = (float) DSPregs[SRC1_REG].lower.i;
break;
case 5: /* cfcvt32d */
printfdbg ("cfcvt32d mvd%d = mvfx%d = %g\n",
DEST_REG,
SRC1_REG,
(double) DSPregs[SRC1_REG].lower.i);
mv_setRegDouble (DEST_REG, (double) DSPregs[SRC1_REG].lower.i);
break;
case 6: /* cfcvt64s */
printfdbg ("cfcvt64s mvf%d = mvdx%d = %f\n",
DEST_REG,
SRC1_REG,
(float) mv_getReg64int (SRC1_REG));
DSPregs[DEST_REG].upper.f = (float) mv_getReg64int (SRC1_REG);
break;
case 7: /* cfcvt64d */
printfdbg ("cfcvt64d mvd%d = mvdx%d = %g\n",
DEST_REG,
SRC1_REG,
(double) mv_getReg64int (SRC1_REG));
mv_setRegDouble (DEST_REG, (double) mv_getReg64int (SRC1_REG));
break;
}
break;
case 1:
switch (opcode2)
{
case 0: /* cfmuls */
printfdbg ("cfmuls mvf%d = mvf%d = %f\n",
DEST_REG,
SRC1_REG,
DSPregs[SRC1_REG].upper.f * DSPregs[SRC2_REG].upper.f);
DSPregs[DEST_REG].upper.f = DSPregs[SRC1_REG].upper.f
* DSPregs[SRC2_REG].upper.f;
break;
case 1: /* cfmuld */
printfdbg ("cfmuld mvd%d = mvd%d = %g\n",
DEST_REG,
SRC1_REG,
mv_getRegDouble (SRC1_REG) * mv_getRegDouble (SRC2_REG));
mv_setRegDouble (DEST_REG,
mv_getRegDouble (SRC1_REG)
* mv_getRegDouble (SRC2_REG));
break;
default:
fprintf (stderr, "unknown opcode in DSPCDP4 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
break;
case 3:
switch (opcode2)
{
case 0: /* cfabss */
DSPregs[DEST_REG].upper.f = (DSPregs[SRC1_REG].upper.f < 0.0F ?
-DSPregs[SRC1_REG].upper.f
: DSPregs[SRC1_REG].upper.f);
printfdbg ("cfabss mvf%d = |mvf%d| = %f\n",
DEST_REG,
SRC1_REG,
DSPregs[DEST_REG].upper.f);
break;
case 1: /* cfabsd */
mv_setRegDouble (DEST_REG,
(mv_getRegDouble (SRC1_REG) < 0.0 ?
-mv_getRegDouble (SRC1_REG)
: mv_getRegDouble (SRC1_REG)));
printfdbg ("cfabsd mvd%d = |mvd%d| = %g\n",
DEST_REG,
SRC1_REG,
mv_getRegDouble (DEST_REG));
break;
case 2: /* cfnegs */
DSPregs[DEST_REG].upper.f = -DSPregs[SRC1_REG].upper.f;
printfdbg ("cfnegs mvf%d = -mvf%d = %f\n",
DEST_REG,
SRC1_REG,
DSPregs[DEST_REG].upper.f);
break;
case 3: /* cfnegd */
mv_setRegDouble (DEST_REG,
-mv_getRegDouble (SRC1_REG));
printfdbg ("cfnegd mvd%d = -mvd%d = %g\n",
DEST_REG,
mv_getRegDouble (DEST_REG));
break;
case 4: /* cfadds */
DSPregs[DEST_REG].upper.f = DSPregs[SRC1_REG].upper.f
+ DSPregs[SRC2_REG].upper.f;
printfdbg ("cfadds mvf%d = mvf%d + mvf%d = %f\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].upper.f);
break;
case 5: /* cfaddd */
mv_setRegDouble (DEST_REG,
mv_getRegDouble (SRC1_REG)
+ mv_getRegDouble (SRC2_REG));
printfdbg ("cfaddd: mvd%d = mvd%d + mvd%d = %g\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
mv_getRegDouble (DEST_REG));
break;
case 6: /* cfsubs */
DSPregs[DEST_REG].upper.f = DSPregs[SRC1_REG].upper.f
- DSPregs[SRC2_REG].upper.f;
printfdbg ("cfsubs: mvf%d = mvf%d - mvf%d = %f\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].upper.f);
break;
case 7: /* cfsubd */
mv_setRegDouble (DEST_REG,
mv_getRegDouble (SRC1_REG)
- mv_getRegDouble (SRC2_REG));
printfdbg ("cfsubd: mvd%d = mvd%d - mvd%d = %g\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
mv_getRegDouble (DEST_REG));
break;
}
break;
default:
fprintf (stderr, "unknown opcode in DSPCDP4 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPCDP5 (ARMul_State * state,
unsigned type,
ARMword instr)
{
int opcode2;
char shift;
opcode2 = BITS (5,7);
/* Shift constants are 7bit signed numbers in bits 0..3|5..7. */
shift = BITS (0, 3) | (BITS (5, 7)) << 4;
if (shift & 0x40)
shift |= 0xc0;
switch (BITS (20,21))
{
case 0:
/* cfsh32 */
printfdbg ("cfsh32 %s amount=%d\n", shift < 0 ? "right" : "left",
shift);
if (shift < 0)
/* Negative shift is a right shift. */
DSPregs[DEST_REG].lower.i = DSPregs[SRC1_REG].lower.i >> -shift;
else
/* Positive shift is a left shift. */
DSPregs[DEST_REG].lower.i = DSPregs[SRC1_REG].lower.i << shift;
break;
case 1:
switch (opcode2)
{
case 0: /* cfmul32 */
DSPregs[DEST_REG].lower.i = DSPregs[SRC1_REG].lower.i
* DSPregs[SRC2_REG].lower.i;
printfdbg ("cfmul32 mvfx%d = mvfx%d * mvfx%d = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].lower.i);
break;
case 1: /* cfmul64 */
mv_setReg64int (DEST_REG,
mv_getReg64int (SRC1_REG)
* mv_getReg64int (SRC2_REG));
printfdbg ("cfmul64 mvdx%d = mvdx%d * mvdx%d = %lld\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
mv_getReg64int (DEST_REG));
break;
case 2: /* cfmac32 */
DSPregs[DEST_REG].lower.i
+= DSPregs[SRC1_REG].lower.i * DSPregs[SRC2_REG].lower.i;
printfdbg ("cfmac32 mvfx%d += mvfx%d * mvfx%d = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].lower.i);
break;
case 3: /* cfmsc32 */
DSPregs[DEST_REG].lower.i
-= DSPregs[SRC1_REG].lower.i * DSPregs[SRC2_REG].lower.i;
printfdbg ("cfmsc32 mvfx%d -= mvfx%d * mvfx%d = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].lower.i);
break;
case 4: /* cfcvts32 */
/* fixme: this should round */
DSPregs[DEST_REG].lower.i = (int) DSPregs[SRC1_REG].upper.f;
printfdbg ("cfcvts32 mvfx%d = mvf%d = %d\n",
DEST_REG,
SRC1_REG,
DSPregs[DEST_REG].lower.i);
break;
case 5: /* cfcvtd32 */
/* fixme: this should round */
DSPregs[DEST_REG].lower.i = (int) mv_getRegDouble (SRC1_REG);
printfdbg ("cfcvtd32 mvdx%d = mvd%d = %d\n",
DEST_REG,
SRC1_REG,
DSPregs[DEST_REG].lower.i);
break;
case 6: /* cftruncs32 */
DSPregs[DEST_REG].lower.i = (int) DSPregs[SRC1_REG].upper.f;
printfdbg ("cftruncs32 mvfx%d = mvf%d = %d\n",
DEST_REG,
SRC1_REG,
DSPregs[DEST_REG].lower.i);
break;
case 7: /* cftruncd32 */
DSPregs[DEST_REG].lower.i = (int) mv_getRegDouble (SRC1_REG);
printfdbg ("cftruncd32 mvfx%d = mvd%d = %d\n",
DEST_REG,
SRC1_REG,
DSPregs[DEST_REG].lower.i);
break;
}
break;
case 2:
/* cfsh64 */
printfdbg ("cfsh64\n");
if (shift < 0)
/* Negative shift is a right shift. */
mv_setReg64int (DEST_REG,
mv_getReg64int (SRC1_REG) >> -shift);
else
/* Positive shift is a left shift. */
mv_setReg64int (DEST_REG,
mv_getReg64int (SRC1_REG) << shift);
printfdbg ("\t%llx\n", mv_getReg64int(DEST_REG));
break;
case 3:
switch (opcode2)
{
case 0: /* cfabs32 */
DSPregs[DEST_REG].lower.i = (DSPregs[SRC1_REG].lower.i < 0
? -DSPregs[SRC1_REG].lower.i : DSPregs[SRC1_REG].lower.i);
printfdbg ("cfabs32 mvfx%d = |mvfx%d| = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].lower.i);
break;
case 1: /* cfabs64 */
mv_setReg64int (DEST_REG,
(mv_getReg64int (SRC1_REG) < 0
? -mv_getReg64int (SRC1_REG)
: mv_getReg64int (SRC1_REG)));
printfdbg ("cfabs64 mvdx%d = |mvdx%d| = %lld\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
mv_getReg64int (DEST_REG));
break;
case 2: /* cfneg32 */
DSPregs[DEST_REG].lower.i = -DSPregs[SRC1_REG].lower.i;
printfdbg ("cfneg32 mvfx%d = -mvfx%d = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].lower.i);
break;
case 3: /* cfneg64 */
mv_setReg64int (DEST_REG, -mv_getReg64int (SRC1_REG));
printfdbg ("cfneg64 mvdx%d = -mvdx%d = %lld\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
mv_getReg64int (DEST_REG));
break;
case 4: /* cfadd32 */
DSPregs[DEST_REG].lower.i = DSPregs[SRC1_REG].lower.i
+ DSPregs[SRC2_REG].lower.i;
printfdbg ("cfadd32 mvfx%d = mvfx%d + mvfx%d = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].lower.i);
break;
case 5: /* cfadd64 */
mv_setReg64int (DEST_REG,
mv_getReg64int (SRC1_REG)
+ mv_getReg64int (SRC2_REG));
printfdbg ("cfadd64 mvdx%d = mvdx%d + mvdx%d = %lld\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
mv_getReg64int (DEST_REG));
break;
case 6: /* cfsub32 */
DSPregs[DEST_REG].lower.i = DSPregs[SRC1_REG].lower.i
- DSPregs[SRC2_REG].lower.i;
printfdbg ("cfsub32 mvfx%d = mvfx%d - mvfx%d = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
DSPregs[DEST_REG].lower.i);
break;
case 7: /* cfsub64 */
mv_setReg64int (DEST_REG,
mv_getReg64int (SRC1_REG)
- mv_getReg64int (SRC2_REG));
printfdbg ("cfsub64 mvdx%d = mvdx%d - mvdx%d = %d\n",
DEST_REG,
SRC1_REG,
SRC2_REG,
mv_getReg64int (DEST_REG));
break;
}
break;
default:
fprintf (stderr, "unknown opcode in DSPCDP5 0x%x\n", instr);
cirrus_not_implemented ("unknown");
break;
}
return ARMul_DONE;
}
unsigned
DSPCDP6 (ARMul_State * state,
unsigned type,
ARMword instr)
{
int opcode2;
opcode2 = BITS (5,7);
switch (BITS (20,21))
{
case 0:
/* cfmadd32 */
cirrus_not_implemented ("cfmadd32");
break;
case 1:
/* cfmsub32 */
cirrus_not_implemented ("cfmsub32");
break;
case 2:
/* cfmadda32 */
cirrus_not_implemented ("cfmadda32");
break;
case 3:
/* cfmsuba32 */
cirrus_not_implemented ("cfmsuba32");
break;
default:
fprintf (stderr, "unknown opcode in DSPCDP6 0x%x\n", instr);
}
return ARMul_DONE;
}
/* Conversion functions.
32-bit integers are stored in the LOWER half of a 64-bit physical
register.
Single precision floats are stored in the UPPER half of a 64-bit
physical register. */
static double
mv_getRegDouble (int regnum)
{
reg_conv.ints[lsw_float_index] = DSPregs[regnum].upper.i;
reg_conv.ints[msw_float_index] = DSPregs[regnum].lower.i;
return reg_conv.d;
}
static void
mv_setRegDouble (int regnum, double val)
{
reg_conv.d = val;
DSPregs[regnum].upper.i = reg_conv.ints[lsw_float_index];
DSPregs[regnum].lower.i = reg_conv.ints[msw_float_index];
}
static long long
mv_getReg64int (int regnum)
{
reg_conv.ints[lsw_int_index] = DSPregs[regnum].lower.i;
reg_conv.ints[msw_int_index] = DSPregs[regnum].upper.i;
return reg_conv.ll;
}
static void
mv_setReg64int (int regnum, long long val)
{
reg_conv.ll = val;
DSPregs[regnum].lower.i = reg_conv.ints[lsw_int_index];
DSPregs[regnum].upper.i = reg_conv.ints[msw_int_index];
}
/* Compute LSW in a double and a long long. */
void
mv_compute_host_endianness (ARMul_State * state)
{
static union
{
long long ll;
long ints[2];
long i;
double d;
float floats[2];
float f;
} conv;
/* Calculate where's the LSW in a 64bit int. */
conv.ll = 45;
if (conv.ints[0] == 0)
{
msw_int_index = 0;
lsw_int_index = 1;
}
else
{
assert (conv.ints[1] == 0);
msw_int_index = 1;
lsw_int_index = 0;
}
/* Calculate where's the LSW in a double. */
conv.d = 3.0;
if (conv.ints[0] == 0)
{
msw_float_index = 0;
lsw_float_index = 1;
}
else
{
assert (conv.ints[1] == 0);
msw_float_index = 1;
lsw_float_index = 0;
}
printfdbg ("lsw_int_index %d\n", lsw_int_index);
printfdbg ("lsw_float_index %d\n", lsw_float_index);
}
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