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fpp.cpp
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fpp.cpp
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/*
* UAE - The Un*x Amiga Emulator
*
* MC68881 emulation
*
* Copyright 1996 Herman ten Brugge
* Modified 2005 Peter Keunecke
*/
#define __USE_ISOC9X /* We might be able to pick up a NaN */
#include <math.h>
#include <float.h>
#include "sysconfig.h"
#include "sysdeps.h"
#include "options.h"
#include "memory.h"
#include "custom.h"
#include "events.h"
#include "newcpu.h"
#include "ersatz.h"
#include "md-fpp.h"
#include "savestate.h"
#include "cpu_prefetch.h"
#include "cpummu.h"
#define DEBUG_FPP 0
STATIC_INLINE int isinrom (void)
{
return (munge24 (m68k_getpc ()) & 0xFFF80000) == 0xF80000 && !currprefs.mmu_model;
}
static uae_u32 xhex_pi[] ={0x2168c235, 0xc90fdaa2, 0x4000};
uae_u32 xhex_exp_1[] ={0xa2bb4a9a, 0xadf85458, 0x4000};
static uae_u32 xhex_l2_e[] ={0x5c17f0bc, 0xb8aa3b29, 0x3fff};
static uae_u32 xhex_ln_2[] ={0xd1cf79ac, 0xb17217f7, 0x3ffe};
uae_u32 xhex_ln_10[] ={0xaaa8ac17, 0x935d8ddd, 0x4000};
uae_u32 xhex_l10_2[] ={0xfbcff798, 0x9a209a84, 0x3ffd};
uae_u32 xhex_l10_e[] ={0x37287195, 0xde5bd8a9, 0x3ffd};
uae_u32 xhex_1e16[] ={0x04000000, 0x8e1bc9bf, 0x4034};
uae_u32 xhex_1e32[] ={0x2b70b59e, 0x9dc5ada8, 0x4069};
uae_u32 xhex_1e64[] ={0xffcfa6d5, 0xc2781f49, 0x40d3};
uae_u32 xhex_1e128[] ={0x80e98ce0, 0x93ba47c9, 0x41a8};
uae_u32 xhex_1e256[] ={0x9df9de8e, 0xaa7eebfb, 0x4351};
uae_u32 xhex_1e512[] ={0xa60e91c7, 0xe319a0ae, 0x46a3};
uae_u32 xhex_1e1024[]={0x81750c17, 0xc9767586, 0x4d48};
uae_u32 xhex_1e2048[]={0xc53d5de5, 0x9e8b3b5d, 0x5a92};
uae_u32 xhex_1e4096[]={0x8a20979b, 0xc4605202, 0x7525};
static uae_u32 xhex_inf[] ={0x00000000, 0x00000000, 0x7fff};
static uae_u32 xhex_nan[] ={0xffffffff, 0xffffffff, 0x7fff};
#if USE_LONG_DOUBLE
static long double *fp_pi = (long double *)xhex_pi;
static long double *fp_exp_1 = (long double *)xhex_exp_1;
static long double *fp_l2_e = (long double *)xhex_l2_e;
static long double *fp_ln_2 = (long double *)xhex_ln_2;
static long double *fp_ln_10 = (long double *)xhex_ln_10;
static long double *fp_l10_2 = (long double *)xhex_l10_2;
static long double *fp_l10_e = (long double *)xhex_l10_e;
static long double *fp_1e16 = (long double *)xhex_1e16;
static long double *fp_1e32 = (long double *)xhex_1e32;
static long double *fp_1e64 = (long double *)xhex_1e64;
static long double *fp_1e128 = (long double *)xhex_1e128;
static long double *fp_1e256 = (long double *)xhex_1e256;
static long double *fp_1e512 = (long double *)xhex_1e512;
static long double *fp_1e1024 = (long double *)xhex_1e1024;
static long double *fp_1e2048 = (long double *)xhex_1e2048;
static long double *fp_1e4096 = (long double *)xhex_1e4096;
static long double *fp_inf = (long double *)xhex_inf;
static long double *fp_nan = (long double *)xhex_nan;
#else
static uae_u32 dhex_pi[] ={0x54442D18, 0x400921FB};
static uae_u32 dhex_exp_1[] ={0x8B145769, 0x4005BF0A};
static uae_u32 dhex_l2_e[] ={0x652B82FE, 0x3FF71547};
static uae_u32 dhex_ln_2[] ={0xFEFA39EF, 0x3FE62E42};
static uae_u32 dhex_ln_10[] ={0xBBB55516, 0x40026BB1};
static uae_u32 dhex_l10_2[] ={0x509F79FF, 0x3FD34413};
static uae_u32 dhex_l10_e[] ={0x1526E50E, 0x3FDBCB7B};
static uae_u32 dhex_1e16[] ={0x37E08000, 0x4341C379};
static uae_u32 dhex_1e32[] ={0xB5056E17, 0x4693B8B5};
static uae_u32 dhex_1e64[] ={0xE93FF9F5, 0x4D384F03};
static uae_u32 dhex_1e128[] ={0xF9301D32, 0x5A827748};
static uae_u32 dhex_1e256[] ={0x7F73BF3C, 0x75154FDD};
static uae_u32 dhex_inf[] ={0x00000000, 0x7ff00000};
static uae_u32 dhex_nan[] ={0xffffffff, 0x7fffffff};
static double *fp_pi = (double *)dhex_pi;
static double *fp_exp_1 = (double *)dhex_exp_1;
static double *fp_l2_e = (double *)dhex_l2_e;
static double *fp_ln_2 = (double *)dhex_ln_2;
static double *fp_ln_10 = (double *)dhex_ln_10;
static double *fp_l10_2 = (double *)dhex_l10_2;
static double *fp_l10_e = (double *)dhex_l10_e;
static double *fp_1e16 = (double *)dhex_1e16;
static double *fp_1e32 = (double *)dhex_1e32;
static double *fp_1e64 = (double *)dhex_1e64;
static double *fp_1e128 = (double *)dhex_1e128;
static double *fp_1e256 = (double *)dhex_1e256;
static double *fp_1e512 = (double *)dhex_inf;
static double *fp_1e1024 = (double *)dhex_inf;
static double *fp_1e2048 = (double *)dhex_inf;
static double *fp_1e4096 = (double *)dhex_inf;
static double *fp_inf = (double *)dhex_inf;
static double *fp_nan = (double *)dhex_nan;
#endif
double fp_1e8 = 1.0e8;
float fp_1e0 = 1, fp_1e1 = 10, fp_1e2 = 100, fp_1e4 = 10000;
#define FFLAG_Z 0x4000
#define FFLAG_N 0x0100
#define FFLAG_NAN 0x0400
#define MAKE_FPSR(r) (regs).fp_result=(r)
static __inline__ void native_set_fpucw (uae_u32 m68k_cw)
{
#ifdef _WIN32
// RN, RZ, RM, RP
static unsigned int fp87_round[4] = { _RC_NEAR, _RC_CHOP, _RC_DOWN, _RC_UP };
// X, S, D, U
static unsigned int fp87_prec[4] = { _PC_64 , _PC_24 , _PC_53, 0 };
_control87(fp87_round[(m68k_cw >> 4) & 3] | fp87_prec[(m68k_cw >> 6) & 3], _MCW_RC | _MCW_PC);
#else
static uae_u16 x87_cw_tab[] = {
0x137f, 0x1f7f, 0x177f, 0x1b7f, /* Extended */
0x107f, 0x1c7f, 0x147f, 0x187f, /* Single */
0x127f, 0x1e7f, 0x167f, 0x1a7f, /* Double */
0x137f, 0x1f7f, 0x177f, 0x1b7f /* undefined */
};
#if USE_X86_FPUCW
uae_u16 x87_cw = x87_cw_tab[(m68k_cw >> 4) & 0xf];
#if defined(X86_MSVC_ASSEMBLY)
__asm {
fldcw word ptr x87_cw
}
#elif defined(X86_ASSEMBLY)
__asm__ ("fldcw %0" : : "m" (*&x87_cw));
#endif
#endif
#endif
}
#if defined(uae_s64) /* Close enough for government work? */
typedef uae_s64 tointtype;
#else
typedef uae_s32 tointtype;
#endif
static void fpu_op_illg (uae_u32 opcode, int pcoffset)
{
if ((currprefs.cpu_model == 68060 && (currprefs.fpu_model == 0 || (regs.pcr & 2)))
|| (currprefs.cpu_model == 68040 && currprefs.fpu_model == 0)) {
/* 68040 unimplemented/68060 FPU disabled exception.
* Line F exception with different stack frame.. */
uaecptr newpc = m68k_getpc ();
uaecptr oldpc = newpc - pcoffset;
regs.t0 = regs.t1 = 0;
MakeSR ();
if (!regs.s) {
regs.usp = m68k_areg (regs, 7);
m68k_areg (regs, 7) = regs.isp;
}
regs.s = 1;
m68k_areg (regs, 7) -= 4;
x_put_long (m68k_areg (regs, 7), oldpc);
m68k_areg (regs, 7) -= 4;
x_put_long (m68k_areg (regs, 7), oldpc);
m68k_areg (regs, 7) -= 2;
x_put_word (m68k_areg (regs, 7), 0x4000 + 11 * 4);
m68k_areg (regs, 7) -= 4;
x_put_long (m68k_areg (regs, 7), newpc);
m68k_areg (regs, 7) -= 2;
x_put_word (m68k_areg (regs, 7), regs.sr);
write_log (L"68040/060 FPU disabled exception PC=%x\n", newpc);
newpc = x_get_long (regs.vbr + 11 * 4);
m68k_setpc (newpc);
#ifdef JIT
set_special (SPCFLAG_END_COMPILE);
#endif
return;
}
op_illg (opcode);
}
STATIC_INLINE int fault_if_no_fpu (uae_u32 opcode, int pcoffset)
{
if ((regs.pcr & 2) || currprefs.fpu_model <= 0) {
fpu_op_illg (opcode, pcoffset);
return 1;
}
return 0;
}
static int get_fpu_version (void)
{
int v = 0;
if (currprefs.fpu_revision >= 0)
return currprefs.fpu_revision;
switch (currprefs.fpu_model)
{
case 68881:
v = 0x1f;
break;
case 68882:
v = 0x20; /* ??? */
break;
case 68040:
v = 0x41;
break;
}
return v;
}
#define fp_round_to_minus_infinity(x) fp_floor(x)
#define fp_round_to_plus_infinity(x) fp_ceil(x)
#define fp_round_to_zero(x) ((int)(x))
#define fp_round_to_nearest(x) ((int)((x) + 0.5))
STATIC_INLINE tointtype toint (fptype src, fptype minval, fptype maxval)
{
if (src < minval)
src = minval;
if (src > maxval)
src = maxval;
#if defined(X86_MSVC_ASSEMBLY)
{
fptype tmp_fp;
__asm {
fld LDPTR src
frndint
fstp LDPTR tmp_fp
}
return (tointtype)tmp_fp;
}
#else /* no X86_MSVC */
{
int result = src;
#if 0
switch (get_fpcr () & 0x30) {
case FPCR_ROUND_ZERO:
result = fp_round_to_zero (src);
break;
case FPCR_ROUND_MINF:
result = fp_round_to_minus_infinity (src);
break;
case FPCR_ROUND_NEAR:
result = fp_round_to_nearest (src);
break;
case FPCR_ROUND_PINF:
result = fp_round_to_plus_infinity (src);
break;
default:
result = src; /* should never be reached */
break;
#endif
return result;
}
#endif
}
extern int isinf (double x);
uae_u32 get_fpsr (void)
{
uae_u32 answer = regs.fpsr & 0x00ffffff;
#ifdef HAVE_ISNAN
if (isnan (regs.fp_result))
answer |= 0x01000000;
else
#endif
{
if (regs.fp_result == 0)
answer |= 0x04000000;
else if (regs.fp_result < 0)
answer |= 0x08000000;
#ifdef HAVE_ISINF
if (isinf (regs.fp_result))
answer |= 0x02000000;
#endif
}
return answer;
}
STATIC_INLINE void set_fpsr (uae_u32 x)
{
regs.fpsr = x;
if (x & 0x01000000) {
regs.fp_result = *fp_nan;
}
else if (x & 0x04000000)
regs.fp_result = 0;
else if (x & 0x08000000)
regs.fp_result = -1;
else
regs.fp_result = 1;
}
/* single : S 8*E 23*F */
/* double : S 11*E 52*F */
/* extended : S 15*E 64*F */
/* E = 0 & F = 0 -> 0 */
/* E = MAX & F = 0 -> Infin */
/* E = MAX & F # 0 -> NotANumber */
/* E = biased by 127 (single) ,1023 (double) ,16383 (extended) */
STATIC_INLINE fptype to_pack (uae_u32 wrd1, uae_u32 wrd2, uae_u32 wrd3)
{
fptype d;
char *cp;
char str[100];
cp = str;
if (wrd1 & 0x80000000)
*cp++ = '-';
*cp++ = (wrd1 & 0xf) + '0';
*cp++ = '.';
*cp++ = ((wrd2 >> 28) & 0xf) + '0';
*cp++ = ((wrd2 >> 24) & 0xf) + '0';
*cp++ = ((wrd2 >> 20) & 0xf) + '0';
*cp++ = ((wrd2 >> 16) & 0xf) + '0';
*cp++ = ((wrd2 >> 12) & 0xf) + '0';
*cp++ = ((wrd2 >> 8) & 0xf) + '0';
*cp++ = ((wrd2 >> 4) & 0xf) + '0';
*cp++ = ((wrd2 >> 0) & 0xf) + '0';
*cp++ = ((wrd3 >> 28) & 0xf) + '0';
*cp++ = ((wrd3 >> 24) & 0xf) + '0';
*cp++ = ((wrd3 >> 20) & 0xf) + '0';
*cp++ = ((wrd3 >> 16) & 0xf) + '0';
*cp++ = ((wrd3 >> 12) & 0xf) + '0';
*cp++ = ((wrd3 >> 8) & 0xf) + '0';
*cp++ = ((wrd3 >> 4) & 0xf) + '0';
*cp++ = ((wrd3 >> 0) & 0xf) + '0';
*cp++ = 'E';
if (wrd1 & 0x40000000)
*cp++ = '-';
*cp++ = ((wrd1 >> 24) & 0xf) + '0';
*cp++ = ((wrd1 >> 20) & 0xf) + '0';
*cp++ = ((wrd1 >> 16) & 0xf) + '0';
*cp = 0;
sscanf (str, "%le", &d);
return d;
}
STATIC_INLINE void from_pack (fptype src, uae_u32 * wrd1, uae_u32 * wrd2, uae_u32 * wrd3)
{
int i;
int t;
char *cp;
char str[100];
sprintf (str, "%.16e", src);
cp = str;
*wrd1 = *wrd2 = *wrd3 = 0;
if (*cp == '-') {
cp++;
*wrd1 = 0x80000000;
}
if (*cp == '+')
cp++;
*wrd1 |= (*cp++ - '0');
if (*cp == '.')
cp++;
for (i = 0; i < 8; i++) {
*wrd2 <<= 4;
if (*cp >= '0' && *cp <= '9')
*wrd2 |= *cp++ - '0';
}
for (i = 0; i < 8; i++) {
*wrd3 <<= 4;
if (*cp >= '0' && *cp <= '9')
*wrd3 |= *cp++ - '0';
}
if (*cp == 'e' || *cp == 'E') {
cp++;
if (*cp == '-') {
cp++;
*wrd1 |= 0x40000000;
}
if (*cp == '+')
cp++;
t = 0;
for (i = 0; i < 3; i++) {
if (*cp >= '0' && *cp <= '9')
t = (t << 4) | (*cp++ - '0');
}
*wrd1 |= t << 16;
}
}
STATIC_INLINE int get_fp_value (uae_u32 opcode, uae_u16 extra, fptype *src)
{
uaecptr tmppc;
uae_u16 tmp;
int size, mode, reg;
uae_u32 ad = 0;
static const int sz1[8] = { 4, 4, 12, 12, 2, 8, 1, 0 };
static const int sz2[8] = { 4, 4, 12, 12, 2, 8, 2, 0 };
if (!(extra & 0x4000)) {
*src = regs.fp[(extra >> 10) & 7];
return 1;
}
mode = (opcode >> 3) & 7;
reg = opcode & 7;
size = (extra >> 10) & 7;
switch (mode) {
case 0:
switch (size) {
case 6:
*src = (fptype) (uae_s8) m68k_dreg (regs, reg);
break;
case 4:
*src = (fptype) (uae_s16) m68k_dreg (regs, reg);
break;
case 0:
*src = (fptype) (uae_s32) m68k_dreg (regs, reg);
break;
case 1:
*src = to_single (m68k_dreg (regs, reg));
break;
default:
return 0;
}
return 1;
case 1:
return 0;
case 2:
ad = m68k_areg (regs, reg);
break;
case 3:
ad = m68k_areg (regs, reg);
m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size];
break;
case 4:
m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size];
ad = m68k_areg (regs, reg);
break;
case 5:
ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) x_next_iword ();
break;
case 6:
ad = x_get_disp_ea_020 (m68k_areg (regs, reg), x_next_iword ());
break;
case 7:
switch (reg) {
case 0:
ad = (uae_s32) (uae_s16) x_next_iword ();
break;
case 1:
ad = x_next_ilong ();
break;
case 2:
ad = m68k_getpc ();
ad += (uae_s32) (uae_s16) x_next_iword ();
break;
case 3:
tmppc = m68k_getpc ();
tmp = x_next_iword ();
ad = x_get_disp_ea_020 (tmppc, tmp);
break;
case 4:
ad = m68k_getpc ();
m68k_setpc (ad + sz2[size]);
if (size == 6)
ad++;
break;
default:
return 0;
}
}
switch (size) {
case 0:
*src = (fptype) (uae_s32) x_get_long (ad);
break;
case 1:
*src = to_single (x_get_long (ad));
break;
case 2:{
uae_u32 wrd1, wrd2, wrd3;
wrd1 = x_get_long (ad);
ad += 4;
wrd2 = x_get_long (ad);
ad += 4;
wrd3 = x_get_long (ad);
*src = to_exten (wrd1, wrd2, wrd3);
}
break;
case 3:{
uae_u32 wrd1, wrd2, wrd3;
wrd1 = x_get_long (ad);
ad += 4;
wrd2 = x_get_long (ad);
ad += 4;
wrd3 = x_get_long (ad);
*src = to_pack (wrd1, wrd2, wrd3);
}
break;
case 4:
*src = (fptype) (uae_s16) x_get_word (ad);
break;
case 5:{
uae_u32 wrd1, wrd2;
wrd1 = x_get_long (ad);
ad += 4;
wrd2 = x_get_long (ad);
*src = to_double (wrd1, wrd2);
}
break;
case 6:
*src = (fptype) (uae_s8) x_get_byte (ad);
break;
default:
return 0;
}
return 1;
}
STATIC_INLINE int put_fp_value (fptype value, uae_u32 opcode, uae_u16 extra)
{
uae_u16 tmp;
uaecptr tmppc;
int size, mode, reg;
uae_u32 ad;
static int sz1[8] = { 4, 4, 12, 12, 2, 8, 1, 0 };
static int sz2[8] = { 4, 4, 12, 12, 2, 8, 2, 0 };
#if DEBUG_FPP
if (!isinrom ())
write_log (L"PUTFP: %f %04X %04X\n", value, opcode, extra);
#endif
if (!(extra & 0x4000)) {
regs.fp[(extra >> 10) & 7] = value;
return 1;
}
reg = opcode & 7;
mode = (opcode >> 3) & 7;
size = (extra >> 10) & 7;
ad = -1;
switch (mode) {
case 0:
switch (size) {
case 6:
m68k_dreg (regs, reg) = (uae_u32)(((toint (value, -128.0, 127.0) & 0xff)
| (m68k_dreg (regs, reg) & ~0xff)));
break;
case 4:
m68k_dreg (regs, reg) = (uae_u32)(((toint (value, -32768.0, 32767.0) & 0xffff)
| (m68k_dreg (regs, reg) & ~0xffff)));
break;
case 0:
m68k_dreg (regs, reg) = (uae_u32)toint (value, -2147483648.0, 2147483647.0);
break;
case 1:
m68k_dreg (regs, reg) = from_single (value);
break;
default:
return 0;
}
return 1;
case 1:
return 0;
case 2:
ad = m68k_areg (regs, reg);
break;
case 3:
ad = m68k_areg (regs, reg);
m68k_areg (regs, reg) += reg == 7 ? sz2[size] : sz1[size];
break;
case 4:
m68k_areg (regs, reg) -= reg == 7 ? sz2[size] : sz1[size];
ad = m68k_areg (regs, reg);
break;
case 5:
ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) x_next_iword ();
break;
case 6:
ad = x_get_disp_ea_020 (m68k_areg (regs, reg), x_next_iword ());
break;
case 7:
switch (reg) {
case 0:
ad = (uae_s32) (uae_s16) x_next_iword ();
break;
case 1:
ad = x_next_ilong ();
break;
case 2:
ad = m68k_getpc ();
ad += (uae_s32) (uae_s16) x_next_iword ();
break;
case 3:
tmppc = m68k_getpc ();
tmp = x_next_iword ();
ad = x_get_disp_ea_020 (tmppc, tmp);
break;
case 4:
ad = m68k_getpc ();
m68k_setpc (ad + sz2[size]);
break;
default:
return 0;
}
}
switch (size) {
case 0:
x_put_long (ad, (uae_u32)toint (value, -2147483648.0, 2147483647.0));
break;
case 1:
x_put_long (ad, from_single (value));
break;
case 2:
{
uae_u32 wrd1, wrd2, wrd3;
from_exten (value, &wrd1, &wrd2, &wrd3);
x_put_long (ad, wrd1);
ad += 4;
x_put_long (ad, wrd2);
ad += 4;
x_put_long (ad, wrd3);
}
break;
case 3:
{
uae_u32 wrd1, wrd2, wrd3;
from_pack (value, &wrd1, &wrd2, &wrd3);
x_put_long (ad, wrd1);
ad += 4;
x_put_long (ad, wrd2);
ad += 4;
x_put_long (ad, wrd3);
}
break;
case 4:
x_put_word (ad, (uae_s16) toint (value, -32768.0, 32767.0));
break;
case 5:{
uae_u32 wrd1, wrd2;
from_double (value, &wrd1, &wrd2);
x_put_long (ad, wrd1);
ad += 4;
x_put_long (ad, wrd2);
}
break;
case 6:
x_put_byte (ad, (uae_s8)toint (value, -128.0, 127.0));
break;
default:
return 0;
}
return 1;
}
STATIC_INLINE int get_fp_ad (uae_u32 opcode, uae_u32 * ad)
{
uae_u16 tmp;
uaecptr tmppc;
int mode;
int reg;
mode = (opcode >> 3) & 7;
reg = opcode & 7;
switch (mode) {
case 0:
case 1:
return 0;
case 2:
*ad = m68k_areg (regs, reg);
break;
case 3:
*ad = m68k_areg (regs, reg);
break;
case 4:
*ad = m68k_areg (regs, reg);
break;
case 5:
*ad = m68k_areg (regs, reg) + (uae_s32) (uae_s16) x_next_iword ();
break;
case 6:
*ad = x_get_disp_ea_020 (m68k_areg (regs, reg), x_next_iword ());
break;
case 7:
switch (reg) {
case 0:
*ad = (uae_s32) (uae_s16) x_next_iword ();
break;
case 1:
*ad = x_next_ilong ();
break;
case 2:
*ad = m68k_getpc ();
*ad += (uae_s32) (uae_s16) x_next_iword ();
break;
case 3:
tmppc = m68k_getpc ();
tmp = x_next_iword ();
*ad = x_get_disp_ea_020 (tmppc, tmp);
break;
default:
return 0;
}
}
return 1;
}
STATIC_INLINE int fpp_cond (int condition)
{
int N = (regs.fp_result < 0.0);
int Z = (regs.fp_result == 0.0);
int NotANumber = 0;
#ifdef HAVE_ISNAN
NotANumber = isnan (regs.fp_result);
#endif
if (NotANumber)
N=Z=0;
switch (condition) {
case 0x00:
return 0;
case 0x01:
return Z;
case 0x02:
return !(NotANumber || Z || N);
case 0x03:
return Z || !(NotANumber || N);
case 0x04:
return N && !(NotANumber || Z);
case 0x05:
return Z || (N && !NotANumber);
case 0x06:
return !(NotANumber || Z);
case 0x07:
return !NotANumber;
case 0x08:
return NotANumber;
case 0x09:
return NotANumber || Z;
case 0x0a:
return NotANumber || !(N || Z);
case 0x0b:
return NotANumber || Z || !N;
case 0x0c:
return NotANumber || (N && !Z);
case 0x0d:
return NotANumber || Z || N;
case 0x0e:
return !Z;
case 0x0f:
return 1;
case 0x10:
return 0;
case 0x11:
return Z;
case 0x12:
return !(NotANumber || Z || N);
case 0x13:
return Z || !(NotANumber || N);
case 0x14:
return N && !(NotANumber || Z);
case 0x15:
return Z || (N && !NotANumber);
case 0x16:
return !(NotANumber || Z);
case 0x17:
return !NotANumber;
case 0x18:
return NotANumber;
case 0x19:
return NotANumber || Z;
case 0x1a:
return NotANumber || !(N || Z);
case 0x1b:
return NotANumber || Z || !N;
case 0x1c:
return NotANumber || (N && !Z);
case 0x1d:
return NotANumber || Z || N;
case 0x1e:
return !Z;
case 0x1f:
return 1;
}
return -1;
}
void fpuop_dbcc (uae_u32 opcode, uae_u16 extra)
{
uaecptr pc = (uae_u32) m68k_getpc ();
uae_s32 disp;
int cc;
#if DEBUG_FPP
if (!isinrom ())
write_log (L"fdbcc_opp at %08lx\n", m68k_getpc ());
#endif
if (fault_if_no_fpu (opcode, 4))
return;
disp = (uae_s32) (uae_s16) x_next_iword ();
cc = fpp_cond (extra & 0x3f);
if (cc == -1) {
fpu_op_illg (opcode, 4);
} else if (!cc) {
int reg = opcode & 0x7;
m68k_dreg (regs, reg) = ((m68k_dreg (regs, reg) & 0xffff0000)
| (((m68k_dreg (regs, reg) & 0xffff) - 1) & 0xffff));
if ((m68k_dreg (regs, reg) & 0xffff) != 0xffff)
m68k_setpc (pc + disp);
}
}
void fpuop_scc (uae_u32 opcode, uae_u16 extra)
{
uae_u32 ad;
int cc;
#if DEBUG_FPP
if (!isinrom ())
write_log (L"fscc_opp at %08lx\n", m68k_getpc ());
#endif
if (fault_if_no_fpu (opcode, 4))
return;
cc = fpp_cond (extra & 0x3f);
if (cc == -1) {
fpu_op_illg (opcode, 4);
} else if ((opcode & 0x38) == 0) {
m68k_dreg (regs, opcode & 7) = (m68k_dreg (regs, opcode & 7) & ~0xff) | (cc ? 0xff : 0x00);
} else {
if (get_fp_ad (opcode, &ad) == 0) {
m68k_setpc (m68k_getpc () - 4);
op_illg (opcode);
} else
x_put_byte (ad, cc ? 0xff : 0x00);
}
}
void fpuop_trapcc (uae_u32 opcode, uaecptr oldpc, uae_u16 extra)
{
int cc;
#if DEBUG_FPP
if (!isinrom ())
write_log (L"ftrapcc_opp at %08lx\n", m68k_getpc ());
#endif
if (fault_if_no_fpu (opcode, m68k_getpc() - oldpc))
return;
cc = fpp_cond (extra & 0x3f);
if (cc == -1) {
fpu_op_illg (opcode, m68k_getpc () - oldpc);
}
if (cc)
Exception (7);
}
void fpuop_bcc (uae_u32 opcode, uaecptr pc, uae_u32 extra)
{
int cc;
#if DEBUG_FPP
if (!isinrom ())
write_log (L"fbcc_opp at %08lx\n", m68k_getpc ());
#endif
if (fault_if_no_fpu (opcode, m68k_getpc () - pc))
return;
cc = fpp_cond (opcode & 0x3f);
if (cc == -1) {
fpu_op_illg (opcode, m68k_getpc () - pc);
} else if (cc) {
if ((opcode & 0x40) == 0)
extra = (uae_s32) (uae_s16) extra;
m68k_setpc (pc + extra);
}
}
void fpuop_save (uae_u32 opcode)
{
uae_u32 ad;
int incr = (opcode & 0x38) == 0x20 ? -1 : 1;
int fpu_version = get_fpu_version();
int i;
#if DEBUG_FPP
if (!isinrom ())
write_log (L"fsave_opp at %08lx\n", m68k_getpc ());
#endif
if (fault_if_no_fpu (opcode, 2))
return;
if (get_fp_ad (opcode, &ad) == 0) {
fpu_op_illg (opcode, 2);
return;
}
// if (regs.fpcr == 0 && regs.fpsr == 0 && regs.fpiar == 0 &&
// regs.fp[0] ==
if (currprefs.fpu_model == 68060) {
/* 12 byte 68060 IDLE frame. */
if (incr < 0) {
ad -= 4;
x_put_long (ad, 0x00000000);
ad -= 4;
x_put_long (ad, 0x00000000);
ad -= 4;
x_put_long (ad, 0x00006000);
} else {
x_put_long (ad, 0x00006000);
ad += 4;
x_put_long (ad, 0x00000000);
ad += 4;
x_put_long (ad, 0x00000000);
ad += 4;
}
} else if (currprefs.fpu_model == 68040) {
/* 4 byte 68040 IDLE frame. */
if (incr < 0) {
ad -= 4;
x_put_long (ad, fpu_version << 24);
} else {
x_put_long (ad, fpu_version << 24);
ad += 4;
}
} else { /* 68881/68882 */
int idle_size = currprefs.fpu_model == 68882 ? 0x38 : 0x18;
if (incr < 0) {
ad -= 4;
x_put_long (ad, 0x70000000);
for (i = 0; i < (idle_size - 1) / 4; i++) {
ad -= 4;
x_put_long (ad, 0x00000000);
}
ad -= 4;
x_put_long (ad, (fpu_version << 24) | (idle_size << 16));
} else {
x_put_long (ad, (fpu_version << 24) | (idle_size << 16));
ad += 4;
for (i = 0; i < (idle_size - 1) / 4; i++) {
x_put_long (ad, 0x00000000);
ad += 4;
}
x_put_long (ad, 0x70000000);
ad += 4;
}
}
if ((opcode & 0x38) == 0x18)
m68k_areg (regs, opcode & 7) = ad;
if ((opcode & 0x38) == 0x20)
m68k_areg (regs, opcode & 7) = ad;
}
void fpuop_restore (uae_u32 opcode)
{
uae_u32 ad;
uae_u32 d;
int incr = (opcode & 0x38) == 0x20 ? -1 : 1;
#if DEBUG_FPP
if (!isinrom ())
write_log (L"frestore_opp at %08lx\n", m68k_getpc ());
#endif
if (fault_if_no_fpu (opcode, 2))
return;
if (get_fp_ad (opcode, &ad) == 0) {
fpu_op_illg (opcode, 2);
return;
}
if (currprefs.fpu_model == 68060) {
/* all 68060 FPU frames are 12 bytes */
if (incr < 0) {
ad -= 4;
d = x_get_long (ad);
ad -= 8;
} else {
d = x_get_long (ad);
ad += 4;
ad += 8;
}
} else if (currprefs.fpu_model == 68040) {
/* 68040 */
if (incr < 0) {
/* @@@ This may be wrong. */
ad -= 4;
d = x_get_long (ad);
if ((d & 0xff000000) != 0) { /* Not a NULL frame? */
if ((d & 0x00ff0000) == 0) { /* IDLE */
} else if ((d & 0x00ff0000) == 0x00300000) { /* UNIMP */
ad -= 44;