/*
  * UAE - The Un*x Amiga Emulator
  *
  * MC68881 emulation
  *
  * Copyright 1996 Herman ten Brugge
  * Adapted for JIT compilation (c) Bernd Meyer, 2000
  * Modified 2005 Peter Keunecke
 */

#include <math.h>

#include "sysconfig.h"
#include "sysdeps.h"

#include "options.h"
#include "memory.h"
#include "custom.h"
#include "newcpu.h"
#include "ersatz.h"
#include "md-fpp.h"
#include "compemu.h"

#if defined(JIT)
uae_u32 temp_fp[] = {0,0,0};  /* To convert between FP and <EA> */

/* 128 words, indexed through the low byte of the 68k fpu control word */
static const uae_u16 x86_fpucw[]={
    0x137f, 0x137f, 0x137f, 0x137f, 0x137f, 0x137f, 0x137f, 0x137f, /* E-RN */
    0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, /* E-RZ */
    0x177f, 0x177f, 0x177f, 0x177f, 0x177f, 0x177f, 0x177f, 0x177f, /* E-RD */
    0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, /* E-RU */

    0x107f, 0x107f, 0x107f, 0x107f, 0x107f, 0x107f, 0x107f, 0x107f, /* S-RN */
    0x1c7f, 0x1c7f, 0x1c7f, 0x1c7f, 0x1c7f, 0x1c7f, 0x1c7f, 0x1c7f, /* S-RZ */
    0x147f, 0x147f, 0x147f, 0x147f, 0x147f, 0x147f, 0x147f, 0x147f, /* S-RD */
    0x187f, 0x187f, 0x187f, 0x187f, 0x187f, 0x187f, 0x187f, 0x187f, /* S-RU */

    0x127f, 0x127f, 0x127f, 0x127f, 0x127f, 0x127f, 0x127f, 0x127f, /* D-RN */
    0x1e7f, 0x1e7f, 0x1e7f, 0x1e7f, 0x1e7f, 0x1e7f, 0x1e7f, 0x1e7f, /* D-RZ */
    0x167f, 0x167f, 0x167f, 0x167f, 0x167f, 0x167f, 0x167f, 0x167f, /* D-RD */
    0x1a7f, 0x1a7f, 0x1a7f, 0x1a7f, 0x1a7f, 0x1a7f, 0x1a7f, 0x1a7f, /* D-RU */

    0x137f, 0x137f, 0x137f, 0x137f, 0x137f, 0x137f, 0x137f, 0x137f, /* ?-RN */
    0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, 0x1f7f, /* ?-RZ */
    0x177f, 0x177f, 0x177f, 0x177f, 0x177f, 0x177f, 0x177f, 0x177f, /* ?-RD */
    0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f, 0x1b7f  /* ?-RU */
};
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 };

/* return the required floating point precision or -1 for failure, 0=E, 1=S, 2=D */
STATIC_INLINE int comp_fp_get (uae_u32 opcode, uae_u16 extra, int treg)
{
    int reg = opcode & 7;
    int mode = (opcode >> 3) & 7;
    int size = (extra >> 10) & 7;

    if (size == 3 || size == 7) /* 3 = packed decimal, 7 is not defined */
	return -1;
    switch (mode) {
     case 0: /* Dn */
	switch (size) {
	 case 0: /* Long */
	    mov_l_mr((uae_u32)temp_fp,reg);
	    fmovi_rm(treg,(uae_u32)temp_fp);
	    return 2;
	 case 1: /* Single */
	    mov_l_mr((uae_u32)temp_fp,reg);
	    fmovs_rm(treg,(uae_u32)temp_fp);
	    return 1;
	 case 4: /* Word */
	    sign_extend_16_rr(S1,reg);
	    mov_l_mr((uae_u32)temp_fp,S1);
	    fmovi_rm(treg,(uae_u32)temp_fp);
	    return 1;
	 case 6: /* Byte */
	    sign_extend_8_rr(S1,reg);
	    mov_l_mr((uae_u32)temp_fp,S1);
	    fmovi_rm(treg,(uae_u32)temp_fp);
	    return 1;
	 default:
	    return -1;
	}
     case 1: /* An,  invalid mode */
	return -1;
     case 2: /* (An) */
	mov_l_rr(S1,reg+8);
	break;
     case 3: /* (An)+ */
	mov_l_rr(S1,reg+8);
	lea_l_brr(reg+8,reg+8,(reg == 7?sz2[size]:sz1[size]));
	break;
     case 4: /* -(An) */
	lea_l_brr(reg+8,reg+8,-(reg == 7?sz2[size]:sz1[size]));
	mov_l_rr(S1,reg+8);
	break;
     case 5: /* (d16,An)  */
      {
	uae_u32 off=(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
	mov_l_rr(S1,reg+8);
	lea_l_brr(S1,S1,off);
	break;
      }
     case 6: /* (d8,An,Xn) or (bd,An,Xn) or ([bd,An,Xn],od) or ([bd,An],Xn,od) */
      {
	uae_u32 dp=comp_get_iword((m68k_pc_offset+=2)-2);
	calc_disp_ea_020(reg+8,dp,S1,S2);
	break;
      }
     case 7:
	switch (reg) {
	 case 0: /* (xxx).W */
	  {
	     uae_u32 off=(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
	     mov_l_ri(S1,off);
	     break;
	  }
	 case 1: /* (xxx).L */
	  {
	     uae_u32 off=comp_get_ilong((m68k_pc_offset+=4)-4);
	     mov_l_ri(S1,off);
	     break;
	  }
	 case 2: /* (d16,PC) */
	  {
	     uae_u32 address=start_pc+((char *)comp_pc_p-(char *)start_pc_p)+
			m68k_pc_offset;
	     uae_s32 PC16off =(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
	     mov_l_ri(S1,address+PC16off);
	     break;
	  }
	 case 3: /* (d8,PC,Xn) or (bd,PC,Xn) or ([bd,PC,Xn],od) or ([bd,PC],Xn,od) */
	     return -1; /* rarely used, fallback to non-JIT */
	 case 4: /* # < data >; Constants should be converted just once by the JIT */
	    m68k_pc_offset+=sz2[size];
	    switch (size) {
		case 0:
		  {
		    uae_s32 li = comp_get_ilong(m68k_pc_offset-4);
		    float si = (float) li;

		    if (li == (int) si) {
			//write_log ("converted immediate LONG constant to SINGLE\n");
			fmovs_ri(treg,*(uae_u32 *)&si);
			return 1;
		    }
		    //write_log ("immediate LONG constant\n");
		    fmovl_ri(treg,li);
		    return 2;
		  }
		case 1:
		    //write_log ("immediate SINGLE constant\n");
		    fmovs_ri(treg,comp_get_ilong(m68k_pc_offset-4));
		    return 1;
		case 2:
		    //write_log ("immediate LONG DOUBLE constant\n");
		    fmov_ext_ri(treg,comp_get_ilong(m68k_pc_offset-4),
				  comp_get_ilong(m68k_pc_offset-8),
				(comp_get_ilong(m68k_pc_offset-12)>>16)&0xffff);
		    return 0;
		case 4:
		  {
		    float si = (float)(uae_s16)comp_get_iword(m68k_pc_offset-2);

		    //write_log ("converted immediate WORD constant to SINGLE\n");
		    fmovs_ri(treg,*(uae_u32 *)&si);
		    return 1;
		  }
		case 5:
		 {
		    uae_u32 longarray[] = {comp_get_ilong(m68k_pc_offset-4),
					   comp_get_ilong(m68k_pc_offset-8)};
		    float si = (float)*(double *)longarray;

		    if (*(double *)longarray == (double)si) {
			//write_log ("SPEED GAIN: converted a DOUBLE constant to SINGLE\n");
			fmovs_ri(treg,*(uae_u32 *)&si);
			return 1;
		    }
		    //write_log ("immediate DOUBLE constant\n");
		    fmov_ri(treg,longarray[0],longarray[1]);
		    return 2;
		 }
		case 6:
		  {
		    float si = (float)(uae_s8)comp_get_ibyte(m68k_pc_offset-2);

		    //write_log ("immediate BYTE constant converted to SINGLE\n");
		    fmovs_ri(treg,*(uae_u32 *)&si);
		    return 1;
		  }
		default: /* never reached */
		    return -1;
	    }
	 default: /* never reached */
	    return -1;
	}
    }

    switch (size) {
     case 0: /* Long */
	readlong(S1,S2,S3);
	mov_l_mr((uae_u32)temp_fp,S2);
	fmovi_rm(treg,(uae_u32)temp_fp);
	return 2;
     case 1: /* Single */
	readlong(S1,S2,S3);
	mov_l_mr((uae_u32)temp_fp,S2);
	fmovs_rm(treg,(uae_u32)temp_fp);
	return 1;
     case 2: /* Long Double */
	readword(S1,S2,S3);
	mov_w_mr(((uae_u32)temp_fp)+8,S2);
	add_l_ri(S1,4);
	readlong(S1,S2,S3);
	mov_l_mr((uae_u32)(temp_fp)+4,S2);
	add_l_ri(S1,4);
	readlong(S1,S2,S3);
	mov_l_mr((uae_u32)(temp_fp),S2);
	fmov_ext_rm(treg,(uae_u32)(temp_fp));
	return 0;
     case 4: /* Word */
	readword(S1,S2,S3);
	sign_extend_16_rr(S2,S2);
	mov_l_mr((uae_u32)temp_fp,S2);
	fmovi_rm(treg,(uae_u32)temp_fp);
	return 1;
     case 5: /* Double */
	readlong(S1,S2,S3);
	mov_l_mr(((uae_u32)temp_fp)+4,S2);
	add_l_ri(S1,4);
	readlong(S1,S2,S3);
	mov_l_mr((uae_u32)(temp_fp),S2);
	fmov_rm(treg,(uae_u32)(temp_fp));
	return 2;
     case 6: /* Byte */
	readbyte(S1,S2,S3);
	sign_extend_8_rr(S2,S2);
	mov_l_mr((uae_u32)temp_fp,S2);
	fmovi_rm(treg,(uae_u32)temp_fp);
	return 1;
     default:
	return -1;
    }
    return -1;
}

/* return of -1 means failure, >=0 means OK */
STATIC_INLINE int comp_fp_put (uae_u32 opcode, uae_u16 extra)
{
    int reg = opcode & 7;
    int sreg = (extra >> 7) &7;
    int mode = (opcode >> 3) & 7;
    int size = (extra >> 10) & 7;

    if (size == 3 || size == 7) /* 3 = packed decimal, 7 is not defined */
	return -1;
    switch (mode) {
     case 0: /* Dn */
	switch (size) {
	 case 0: /* FMOVE.L FPx, Dn */
#if USE_X86_FPUCW
	    if (!(regs.fpcr & 0xf0)) { /* if extended round to nearest */
		mov_l_ri(S1,0x10); /* use extended round to zero mode */
		fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		fmovi_mr((uae_u32)temp_fp,sreg);
		mov_l_rm(reg,(uae_u32)temp_fp);
		mov_l_rm(S1,(uae_u32)&regs.fpcr);
		and_l_ri(S1,0xf0); /* restore control word */
		fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		return 0;
	    }
#endif
	    fmovi_mr((uae_u32)temp_fp,sreg);
	    mov_l_rm(reg,(uae_u32)temp_fp);
	    return 0;
	 case 1: /* FMOVE.S FPx, Dn */
	    fmovs_mr((uae_u32)temp_fp,sreg);
	    mov_l_rm(reg,(uae_u32)temp_fp);
	    return 0;
	 case 4: /* FMOVE.W FPx, Dn */
#if USE_X86_FPUCW
	    if (!(regs.fpcr & 0xf0)) { /* if extended round to nearest */
		mov_l_ri(S1,0x10); /* use extended round to zero mode */
		fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		fmovi_mr((uae_u32)temp_fp,sreg);
		mov_w_rm(reg,(uae_u32)temp_fp);
		mov_l_rm(S1,(uae_u32)&regs.fpcr);
		and_l_ri(S1,0xf0); /* restore control word */
		fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		return 0;
	    }
#endif
	    fmovi_mr((uae_u32)temp_fp,sreg);
	    mov_w_rm(reg,(uae_u32)temp_fp);
	    return 0;
	 case 6: /* FMOVE.B FPx, Dn */
#if USE_X86_FPUCW
	    if (!(regs.fpcr & 0xf0)) { /* if extended round to nearest */
		mov_l_ri(S1,0x10); /* use extended round to zero mode */
		fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		fmovi_mr((uae_u32)temp_fp,sreg);
		mov_b_rm(reg,(uae_u32)temp_fp);
		mov_l_rm(S1,(uae_u32)&regs.fpcr);
		and_l_ri(S1,0xf0); /* restore control word */
		fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		return 0;
	    }
#endif
	    fmovi_mr((uae_u32)temp_fp,sreg);
	    mov_b_rm(reg,(uae_u32)temp_fp);
	    return 0;
	 default:
	    return -1;
	}
     case 1: /* An, invalid mode */
	return -1;
     case 2: /* (An) */
	mov_l_rr(S1,reg+8);
	break;
     case 3: /* (An)+ */
	mov_l_rr(S1,reg+8);
	lea_l_brr(reg+8,reg+8,(reg == 7?sz2[size]:sz1[size]));
	break;
     case 4: /* -(An) */
	lea_l_brr(reg+8,reg+8,-(reg == 7?sz2[size]:sz1[size]));
	mov_l_rr(S1,reg+8);
	break;
     case 5: /* (d16,An) */
      {
	uae_u32 off=(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
	mov_l_rr(S1,reg+8);
	add_l_ri(S1,off);
	break;
      }
     case 6: /* (d8,An,Xn) or (bd,An,Xn) or ([bd,An,Xn],od) or ([bd,An],Xn,od) */
      {
	uae_u32 dp=comp_get_iword((m68k_pc_offset+=2)-2);
	calc_disp_ea_020(reg+8,dp,S1,S2);
	break;
      }
     case 7:
	switch (reg) {
	 case 0: /* (xxx).W */
	  {
	     uae_u32 off=(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
	     mov_l_ri(S1,off);
	     break;
	  }
	 case 1: /* (xxx).L */
	  {
	     uae_u32 off=comp_get_ilong((m68k_pc_offset+=4)-4);
	     mov_l_ri(S1,off);
	     break;
	  }
	 default: /* All other modes are not allowed for FPx to <EA> */
	    write_log ("JIT FMOVE FPx,<EA> Mode is not allowed %04x %04x\n",opcode,extra);
	    return -1;
	}
    }
    switch (size) {
     case 0: /* Long */
	fmovi_mr((uae_u32)temp_fp,sreg);
	mov_l_rm(S2,(uae_u32)temp_fp);
	writelong_clobber(S1,S2,S3);
	return 0;
     case 1: /* Single */
	fmovs_mr((uae_u32)temp_fp,sreg);
	mov_l_rm(S2,(uae_u32)temp_fp);
	writelong_clobber(S1,S2,S3);
	return 0;
     case 2:/* Long Double */
	fmov_ext_mr((uae_u32)temp_fp,sreg);
	mov_w_rm(S2,(uae_u32)temp_fp+8);
	writeword_clobber(S1,S2,S3);
	add_l_ri(S1,4);
	mov_l_rm(S2,(uae_u32)temp_fp+4);
	writelong_clobber(S1,S2,S3);
	add_l_ri(S1,4);
	mov_l_rm(S2,(uae_u32)temp_fp);
	writelong_clobber(S1,S2,S3);
	return 0;
     case 4: /* Word */
	fmovi_mr((uae_u32)temp_fp,sreg);
	mov_l_rm(S2,(uae_u32)temp_fp);
	writeword_clobber(S1,S2,S3);
	return 0;
     case 5: /* Double */
	fmov_mr((uae_u32)temp_fp,sreg);
	mov_l_rm(S2,(uae_u32)temp_fp+4);
	writelong_clobber(S1,S2,S3);
	add_l_ri(S1,4);
	mov_l_rm(S2,(uae_u32)temp_fp);
	writelong_clobber(S1,S2,S3);
	return 0;
     case 6: /* Byte */
	fmovi_mr((uae_u32)temp_fp,sreg);
	mov_l_rm(S2,(uae_u32)temp_fp);
	writebyte(S1,S2,S3);
	return 0;
     default:
	return -1;
    }
    return -1;
}

/* return -1 for failure, or register number for success */
STATIC_INLINE int comp_fp_adr (uae_u32 opcode)
{
    uae_s32 off;
    int mode = (opcode >> 3) & 7;
    int reg = opcode & 7;

    switch (mode) {
     case 2:
     case 3:
     case 4:
	mov_l_rr(S1,8+reg);
	return S1;
     case 5:
	off=(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
	mov_l_rr(S1,8+reg);
	add_l_ri(S1,off);
	return S1;
     case 7:
	switch (reg) {
	 case 0:
	    off=(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
	    mov_l_ri(S1,off);
	    return S1;
	 case 1:
	    off=comp_get_ilong((m68k_pc_offset+=4)-4);
	    mov_l_ri(S1,off);
	    return S1;
	}
    default:
	return -1;
    }
}

void comp_fdbcc_opp (uae_u32 opcode, uae_u16 extra)
{
    FAIL(1);
    return;
}

void comp_fscc_opp (uae_u32 opcode, uae_u16 extra)
{
    uae_u32 ad;
    int cc;
    int reg;

    if (!currprefs.compfpu) {
	FAIL(1);
	return;
    }

#if DEBUG_FPP
    write_log ("JIT: fscc_opp at %08lx\n", M68K_GETPC);
#endif

    if (extra&0x20) {  /* only cc from 00 to 1f are defined */
	FAIL(1);
	return;
    }
    if ((opcode & 0x38) != 0) { /* We can only do to integer register */
	FAIL(1);
	return;
    }

    fflags_into_flags(S2);
    reg=(opcode&7);

    mov_l_ri(S1,255);
    mov_l_ri(S4,0);
    switch(extra&0x0f) { /* according to fpp.c, the 0x10 bit is ignored */
     case 0: break;  /* set never */
     case 1: mov_l_rr(S2,S4);
	cmov_l_rr(S4,S1,4);
	cmov_l_rr(S4,S2,10); break;
     case 2: cmov_l_rr(S4,S1,7); break;
     case 3: cmov_l_rr(S4,S1,3); break;
     case 4: mov_l_rr(S2,S4);
	cmov_l_rr(S4,S1,2);
	cmov_l_rr(S4,S2,10); break;
     case 5: mov_l_rr(S2,S4);
	cmov_l_rr(S4,S1,6);
	cmov_l_rr(S4,S2,10); break;
     case 6: cmov_l_rr(S4,S1,5); break;
     case 7: cmov_l_rr(S4,S1,11); break;
     case 8: cmov_l_rr(S4,S1,10); break;
     case 9: cmov_l_rr(S4,S1,4); break;
     case 10: cmov_l_rr(S4,S1,10); cmov_l_rr(S4,S1,7); break;
     case 11: cmov_l_rr(S4,S1,4); cmov_l_rr(S4,S1,3); break;
     case 12: cmov_l_rr(S4,S1,2); break;
     case 13: cmov_l_rr(S4,S1,6); break;
     case 14: cmov_l_rr(S4,S1,5); cmov_l_rr(S4,S1,10); break;
     case 15: mov_l_rr(S4,S1); break;
    }

    if (!(opcode & 0x38))
	mov_b_rr(reg,S4);
    else {
	abort();
	if (!comp_fp_adr (opcode)) {
	    m68k_setpc (&regs, m68k_getpc (&regs) - 4);
	    op_illg (opcode, &regs);
	}
	else
	    put_byte (ad, cc ? 0xff : 0x00);
    }
}

void comp_ftrapcc_opp (uae_u32 opcode, uaecptr oldpc)
{
    FAIL(1);
    return;
}

extern unsigned long foink3, oink;

void comp_fbcc_opp (uae_u32 opcode)
{
    uae_u32 start_68k_offset=m68k_pc_offset;
    uae_u32 off, v1, v2;
    int cc;

    if (!currprefs.compfpu) {
	FAIL(1);
	return;
    }

    if (opcode&0x20) {  /* only cc from 00 to 1f are defined */
	FAIL(1);
	return;
    }
    if (!(opcode&0x40)) {
	off=(uae_s32)(uae_s16)comp_get_iword((m68k_pc_offset+=2)-2);
    }
    else {
	off=comp_get_ilong((m68k_pc_offset+=4)-4);
    }
    mov_l_ri(S1,(uae_u32)
	     (comp_pc_p+off-(m68k_pc_offset-start_68k_offset)));
    mov_l_ri(PC_P,(uae_u32)comp_pc_p);

    /* Now they are both constant. Might as well fold in m68k_pc_offset */
    add_l_ri(S1,m68k_pc_offset);
    add_l_ri(PC_P,m68k_pc_offset);
    m68k_pc_offset=0;

    /* according to fpp.c, the 0x10 bit is ignored
       (it handles exception handling, which we don't
       do, anyway ;-) */
    cc=opcode&0x0f;
    v1=get_const(PC_P);
    v2=get_const(S1);
    fflags_into_flags(S2);

    // mov_l_mi((uae_u32)&foink3,cc);
    switch(cc) {
     case 0: break;  /* jump never */
     case 1:
	mov_l_rr(S2,PC_P);
	cmov_l_rr(PC_P,S1,4);
	cmov_l_rr(PC_P,S2,10); break;
     case 2: register_branch(v1,v2,7); break;
     case 3: register_branch(v1,v2,3); break;
     case 4:
	mov_l_rr(S2,PC_P);
	cmov_l_rr(PC_P,S1,2);
	cmov_l_rr(PC_P,S2,10); break;
     case 5:
	mov_l_rr(S2,PC_P);
	cmov_l_rr(PC_P,S1,6);
	cmov_l_rr(PC_P,S2,10); break;
     case 6: register_branch(v1,v2,5); break;
     case 7: register_branch(v1,v2,11); break;
     case 8: register_branch(v1,v2,10); break;
     case 9: register_branch(v1,v2,4); break;
     case 10:
	cmov_l_rr(PC_P,S1,10);
	cmov_l_rr(PC_P,S1,7); break;
     case 11:
	cmov_l_rr(PC_P,S1,4);
	cmov_l_rr(PC_P,S1,3); break;
     case 12: register_branch(v1,v2,2); break;
     case 13: register_branch(v1,v2,6); break;
     case 14:
	cmov_l_rr(PC_P,S1,5);
	cmov_l_rr(PC_P,S1,10); break;
     case 15: mov_l_rr(PC_P,S1); break;
    }
}

    /* Floating point conditions
       The "NotANumber" part could be problematic; Howver, when NaN is
       encountered, the ftst instruction sets bot N and Z to 1 on the x87,
       so quite often things just fall into place. This is probably not
       accurate wrt the 68k FPU, but it is *as* accurate as this was before.
       However, some more thought should go into fixing this stuff up so
       it accurately emulates the 68k FPU.
>=<U
0000    0x00: 0                        ---   Never jump
0101    0x01: Z                        ---   jump if zero (x86: 4)
1000    0x02: !(NotANumber || Z || N)  --- Neither Z nor N set (x86: 7)
1101    0x03: Z || !(NotANumber || N); --- Z or !N (x86: 4 and 3)
0010    0x04: N && !(NotANumber || Z); --- N and !Z (x86: hard!)
0111    0x05: Z || (N && !NotANumber); --- Z or N (x86: 6)
1010    0x06: !(NotANumber || Z);      --- not Z (x86: 5)
1110    0x07: !NotANumber;             --- not NaN (x86: 11, not parity)
0001    0x08: NotANumber;              --- NaN (x86: 10)
0101    0x09: NotANumber || Z;         --- Z (x86: 4)
1001    0x0a: NotANumber || !(N || Z); --- NaN or neither N nor Z (x86: 10 and 7)
1101    0x0b: NotANumber || Z || !N;   --- Z or !N (x86: 4 and 3)
0011    0x0c: NotANumber || (N && !Z); --- N (x86: 2)
0111    0x0d: NotANumber || Z || N;    --- Z or N (x86: 6)
1010    0x0e: !Z;                      --- not Z (x86: 5)
1111    0x0f: 1;                       --- always

This is not how the 68k handles things, though --- it sets Z to 0 and N
to the NaN's sign.... ('o' and 'i' denote differences from the above
table)

>=<U
0000    0x00: 0                        ---   Never jump
010o    0x01: Z                        ---   jump if zero (x86: 4, not 10)
1000    0x02: !(NotANumber || Z || N)  --- Neither Z nor N set (x86: 7)
110o    0x03: Z || !(NotANumber || N); --- Z or !N (x86: 3)
0010    0x04: N && !(NotANumber || Z); --- N and !Z (x86: 2, not 10)
011o    0x05: Z || (N && !NotANumber); --- Z or N (x86: 6, not 10)
1010    0x06: !(NotANumber || Z);      --- not Z (x86: 5)
1110    0x07: !NotANumber;             --- not NaN (x86: 11, not parity)
0001    0x08: NotANumber;              --- NaN (x86: 10)
0101    0x09: NotANumber || Z;         --- Z (x86: 4)
1001    0x0a: NotANumber || !(N || Z); --- NaN or neither N nor Z (x86: 10 and 7)
1101    0x0b: NotANumber || Z || !N;   --- Z or !N (x86: 4 and 3)
0011    0x0c: NotANumber || (N && !Z); --- N (x86: 2)
0111    0x0d: NotANumber || Z || N;    --- Z or N (x86: 6)
101i    0x0e: !Z;                      --- not Z (x86: 5 and 10)
1111    0x0f: 1;                       --- always

Of course, this *still* doesn't mean that the x86 and 68k conditions are
equivalent --- the handling of infinities is different, for one thing.
On the 68k, +infinity minus +infinity is NotANumber (as it should be). On
the x86, it is +infinity, and some exception is raised (which I suspect
is promptly ignored) STUPID!
The more I learn about their CPUs, the more I detest Intel....

You can see this in action if you have "Benoit" (see Aminet) and
set the exponent to 16. Wait for a long time, and marvel at the extra black
areas outside the center one. That's where Benoit expects NaN, and the x86
gives +infinity. [Ooops --- that must have been some kind of bug in my code.
it no longer happens, and the resulting graphic looks much better, too]

x86 conditions
0011    : 2
1100    : 3
0101    : 4
1010    : 5
0111    : 6
1000    : 7
0001    : 10
1110    : 11
    */
void comp_fsave_opp (uae_u32 opcode)
{
    uae_u32 ad;
    int incr = (opcode & 0x38) == 0x20 ? -1 : 1;
    int i;

    FAIL(1);
    return;

    if (!currprefs.compfpu) {
	FAIL(1);
	return;
    }

#if DEBUG_FPP
    write_log ("JIT: fsave_opp at %08lx\n", M68K_GETPC);
#endif
    if (!comp_fp_adr (opcode)) {
	m68k_setpc (&regs, m68k_getpc (&regs) - 2);
	op_illg (opcode, &regs);
	return;
    }

    if (currprefs.cpu_level >= 4) {
	/* 4 byte 68040 IDLE frame.  */
	if (incr < 0) {
	    ad -= 4;
	    put_long (ad, 0x41000000);
	} else {
	    put_long (ad, 0x41000000);
	    ad += 4;
	}
    } else {
	if (incr < 0) {
	    ad -= 4;
	    put_long (ad, 0x70000000);
	    for (i = 0; i < 5; i++) {
		ad -= 4;
		put_long (ad, 0x00000000);
	    }
	    ad -= 4;
	    put_long (ad, 0x1f180000);
	} else {
	    put_long (ad, 0x1f180000);
	    ad += 4;
	    for (i = 0; i < 5; i++) {
		put_long (ad, 0x00000000);
		ad += 4;
	    }
	    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 comp_frestore_opp (uae_u32 opcode)
{
    uae_u32 ad;
    uae_u32 d;
    int incr = (opcode & 0x38) == 0x20 ? -1 : 1;

    FAIL(1);
    return;

    if (!currprefs.compfpu) {
	FAIL(1);
	return;
    }

#if DEBUG_FPP
    write_log ("frestore_opp at %08lx\n", M68K_GETPC);
#endif
    if (!comp_fp_adr (opcode)) {
	m68k_setpc (&regs, m68k_getpc (&regs) - 2);
	op_illg (opcode, &regs);
	return;
    }
    if (currprefs.cpu_level >= 4) {
	/* 68040 */
	if (incr < 0) {
	    /* @@@ This may be wrong.  */
	    ad -= 4;
	    d = get_long (ad);
	    if (d & 0xff000000) { /* Not a NULL frame? */
		if (!(d & 0x00ff0000)) { /* IDLE */
		} else if ((d & 0x00ff0000) == 0x00300000) { /* UNIMP */
		    ad -= 44;
		} else if ((d & 0x00ff0000) == 0x00600000) { /* BUSY */
		    ad -= 92;
		}
	    }
	} else {
	    d = get_long (ad);
	    ad += 4;
	    if (d & 0xff000000) { /* Not a NULL frame? */
		if (!(d & 0x00ff0000)) { /* IDLE */
		} else if ((d & 0x00ff0000) == 0x00300000) { /* UNIMP */
		    ad += 44;
		} else if ((d & 0x00ff0000) == 0x00600000) { /* BUSY */
		    ad += 92;
		}
	    }
	}
    } else {
	if (incr < 0) {
	    ad -= 4;
	    d = get_long (ad);
	    if (d & 0xff000000) {
		if ((d & 0x00ff0000) == 0x00180000)
		    ad -= 6 * 4;
		else if ((d & 0x00ff0000) == 0x00380000)
		    ad -= 14 * 4;
		else if ((d & 0x00ff0000) == 0x00b40000)
		    ad -= 45 * 4;
	    }
	} else {
	    d = get_long (ad);
	    ad += 4;
	    if (d & 0xff000000) {
		if ((d & 0x00ff0000) == 0x00180000)
		    ad += 6 * 4;
		else if ((d & 0x00ff0000) == 0x00380000)
		    ad += 14 * 4;
		else if ((d & 0x00ff0000) == 0x00b40000)
		    ad += 45 * 4;
	    }
	}
    }
    if ((opcode & 0x38) == 0x18)
	m68k_areg (&regs, opcode & 7) = ad;
    if ((opcode & 0x38) == 0x20)
	m68k_areg (&regs, opcode & 7) = ad;
}

extern uae_u32 xhex_pi[], xhex_exp_1[], xhex_l2_e[], xhex_ln_2[], xhex_ln_10[];
extern uae_u32 xhex_l10_2[], xhex_l10_e[], xhex_1e16[], xhex_1e32[], xhex_1e64[];
extern uae_u32 xhex_1e128[], xhex_1e256[], xhex_1e512[], xhex_1e1024[];
extern uae_u32 xhex_1e2048[], xhex_1e4096[];
extern double fp_1e8;
extern float  fp_1e1, fp_1e2, fp_1e4;

void comp_fpp_opp (uae_u32 opcode, uae_u16 extra)
{
    int sreg, prec = 0;
    int	dreg = (extra >> 7) & 7;
    int source = (extra >> 13) & 7;
    int	opmode = extra & 0x7f;

    if (!currprefs.compfpu) {
	FAIL(1);
	return;
    }
    switch (source) {
     case 3: /* FMOVE FPx, <EA> */
	if (comp_fp_put(opcode,extra) < 0)
	    FAIL(1);
	return;
     case 4: /* FMOVE.L  <EA>, ControlReg */
	if (!(opcode & 0x30)) { /* Dn or An */
		if (extra & 0x1000) { /* FPCR */
		    mov_l_mr((uae_u32)&regs.fpcr,opcode & 15);
#if USE_X86_FPUCW
		    mov_l_rr(S1,opcode & 15);
		    and_l_ri(S1,0xf0);
		    fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
#endif
		    return;
		}
		if (extra & 0x0800) { /* FPSR */
		    FAIL(1);
		    return;
		    // set_fpsr(m68k_dreg (regs, opcode & 15));
		}
		if (extra & 0x0400) { /* FPIAR */
		    mov_l_mr((uae_u32)&regs.fpiar,opcode & 15); return;
		}
	}
	else if ((opcode & 0x3f) == 0x3c) {
		if (extra & 0x1000) { /* FPCR */
		    uae_u32 val=comp_get_ilong((m68k_pc_offset+=4)-4);
		    mov_l_mi((uae_u32)&regs.fpcr,val);
#if USE_X86_FPUCW
		    mov_l_ri(S1,val&0xf0);
		    fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
#endif
		    return;
		}
		if (extra & 0x0800) { /* FPSR */
		    FAIL(1);
		    return;
		}
		if (extra & 0x0400) { /* FPIAR */
		    uae_u32 val=comp_get_ilong((m68k_pc_offset+=4)-4);
		    mov_l_mi((uae_u32)&regs.fpiar,val);
		    return;
		}
	}
	FAIL(1);
	return;
     case 5: /* FMOVE.L  ControlReg, <EA> */
	if (!(opcode & 0x30)) { /* Dn or An */
		if (extra & 0x1000) { /* FPCR */
		    mov_l_rm(opcode & 15,(uae_u32)&regs.fpcr); return;
		}
		if (extra & 0x0800) { /* FPSR */
		    FAIL(1);
		    return;
		}
		if (extra & 0x0400) { /* FPIAR */
		    mov_l_rm(opcode & 15,(uae_u32)&regs.fpiar); return;
		}
	}
	FAIL(1);
	return;
     case 6: /* FMOVEM  <EA>, FPx-FPz */
	if (!(extra & 0x0800)) {
	    uae_u32 list = extra & 0xff;
	    int ad;
	    if ((ad = comp_fp_adr(opcode)) < 0) {FAIL(1);return;}
	    while (list) {
		if  (extra & 0x1000) { /* postincrement */
		    readword(ad,S2,S3);
		    mov_w_mr(((uae_u32)temp_fp)+8,S2);
		    add_l_ri(ad,4);
		    readlong(ad,S2,S3);
		    mov_l_mr((uae_u32)(temp_fp)+4,S2);
		    add_l_ri(ad,4);
		    readlong(ad,S2,S3);
		    mov_l_mr((uae_u32)(temp_fp),S2);
		    add_l_ri(ad,4);
		    fmov_ext_rm(fpp_movem_index1[list],(uae_u32)(temp_fp));
		} else { /* predecrement */
		    sub_l_ri(ad,4);
		    readlong(ad,S2,S3);
		    mov_l_mr((uae_u32)(temp_fp),S2);
		    sub_l_ri(ad,4);
		    readlong(ad,S2,S3);
		    mov_l_mr((uae_u32)(temp_fp)+4,S2);
		    sub_l_ri(ad,4);
		    readword(ad,S2,S3);
		    mov_w_mr(((uae_u32)temp_fp)+8,S2);
		    fmov_ext_rm(fpp_movem_index2[list],(uae_u32)(temp_fp));
		}
		list = fpp_movem_next[list];
	    }
	    if ((opcode & 0x38) == 0x18)
		mov_l_rr((opcode & 7)+8,ad);
	    return;
	} /* no break for dynamic register list */
     case 7: /* FMOVEM  FPx-FPz, <EA> */
	if (!(extra & 0x0800)) {
	    uae_u32 list = extra & 0xff;
	    int ad;
	    if ((ad = comp_fp_adr(opcode)) < 0) {FAIL(1);return;}
	    while (list) {
		if (extra & 0x1000) { /* postincrement */
		    fmov_ext_mr((uae_u32)temp_fp,fpp_movem_index2[list]);
		    mov_w_rm(S2,(uae_u32)temp_fp+8);
		    writeword_clobber(ad,S2,S3);
		    add_l_ri(ad,4);
		    mov_l_rm(S2,(uae_u32)temp_fp+4);
		    writelong_clobber(ad,S2,S3);
		    add_l_ri(ad,4);
		    mov_l_rm(S2,(uae_u32)temp_fp);
		    writelong_clobber(ad,S2,S3);
		    add_l_ri(ad,4);
		} else { /* predecrement */
		    fmov_ext_mr((uae_u32)temp_fp,fpp_movem_index2[list]);
		    sub_l_ri(ad,4);
		    mov_l_rm(S2,(uae_u32)temp_fp);
		    writelong_clobber(ad,S2,S3);
		    sub_l_ri(ad,4);
		    mov_l_rm(S2,(uae_u32)temp_fp+4);
		    writelong_clobber(ad,S2,S3);
		    sub_l_ri(ad,4);
		    mov_w_rm(S2,(uae_u32)temp_fp+8);
		    writeword_clobber(ad,S2,S3);
		}
		list = fpp_movem_next[list];
	    }
	    if ((opcode & 0x38) == 0x20)
		mov_l_rr((opcode & 7)+8,ad);
	    return;
	} /* no break */
	write_log ("fallback from JIT FMOVEM dynamic register list\n");
	FAIL(1);
	return;
     case 2: /* from <EA> to FPx */
	dont_care_fflags();
	if ((extra & 0xfc00) == 0x5c00) { /* FMOVECR */
	    //write_log ("JIT FMOVECR %x\n", opmode);
	    switch (opmode) {
		case 0x00:
		    fmov_pi(dreg);
		    break;
		case 0x0b:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_l10_2);
		    break;
		case 0x0c:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_exp_1);
		    break;
		case 0x0d:
		    fmov_log2_e(dreg);
		    break;
		case 0x0e:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_l10_e);
		    break;
		case 0x0f:
		    fmov_0(dreg);
		    break;
		case 0x30:
		    fmov_loge_2(dreg);
		    break;
		case 0x31:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_ln_10);
		    break;
		case 0x32:
		    fmov_1(dreg);
		    break;
		case 0x33:
		    fmovs_rm(dreg,(uae_u32)&fp_1e1);
		    break;
		case 0x34:
		    fmovs_rm(dreg,(uae_u32)&fp_1e2);
		    break;
		case 0x35:
		    fmovs_rm(dreg,(uae_u32)&fp_1e4);
		    break;
		case 0x36:
		    fmov_rm(dreg,(uae_u32)&fp_1e8);
		    break;
		case 0x37:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e16);
		    break;
		case 0x38:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e32);
		    break;
		case 0x39:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e64);
		    break;
		case 0x3a:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e128);
		    break;
		case 0x3b:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e256);
		    break;
		case 0x3c:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e512);
		    break;
		case 0x3d:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e1024);
		    break;
		case 0x3e:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e2048);
		    break;
		case 0x3f:
		    fmov_ext_rm(dreg,(uae_u32)&xhex_1e4096);
		    break;
		default:
		    FAIL(1);
		    return;
	    }
	    fmov_rr(FP_RESULT,dreg);
	    return;
	}
	if (opmode & 0x20) /* two operands, so we need a scratch reg */
	    sreg = FS1;
	else /* one operand only, thus we can load the argument into dreg */
	    sreg = dreg;
	if ((prec = comp_fp_get(opcode,extra,sreg)) < 0) {
	    FAIL(1);
	    return;
	}
	if (!opmode) { /* FMOVE  <EA>,FPx */
	    fmov_rr(FP_RESULT,dreg);
	    return;
	}
	/* no break here for <EA> to dreg */
     case 0: /* directly from sreg to dreg */
	if (!source) { /* no <EA> */
	    dont_care_fflags();
	    sreg = (extra >> 10) & 7;
	}
	switch (opmode) {
	    case 0x00: /* FMOVE */
		fmov_rr(dreg,sreg);
		break;
	    case 0x01: /* FINT */
		frndint_rr(dreg,sreg);
		break;
	    case 0x02: /* FSINH */
		fsinh_rr(dreg,sreg);
		break;
	    case 0x03: /* FINTRZ */
#if USE_X86_FPUCW /* if we have control over the CW, we can do this */
		if ((regs.fpcr & 0xf0) == 0x10) /* maybe unsafe, because this test is done */
		    frndint_rr(dreg,sreg); /* during the JIT compilation and not at runtime */
		else {
		    mov_l_ri(S1,0x10); /* extended round to zero */
		    fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    frndint_rr(dreg,sreg);
		    mov_l_rm(S1,(uae_u32)&regs.fpcr);
		    and_l_ri(S1,0xf0); /* restore control word */
		    fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		}
		break;
#endif
		FAIL(1);
		return;
	    case 0x04: /* FSQRT */
		fsqrt_rr(dreg,sreg);
		break;
	    case 0x06: /* FLOGNP1 */
		flogNP1_rr(dreg,sreg);
		break;
	    case 0x08: /* FETOXM1 */
		fetoxM1_rr(dreg,sreg);
		break;
	    case 0x09: /* FTANH */
		ftanh_rr(dreg,sreg);
		break;
	    case 0x0a: /* FATAN */
		fatan_rr(dreg,sreg);
		break;
	    case 0x0c: /* FASIN */
		fasin_rr(dreg,sreg);
		break;
	    case 0x0d: /* FATANH */
		fatanh_rr(dreg,sreg);
		break;
	    case 0x0e: /* FSIN */
		fsin_rr(dreg,sreg);
		break;
	    case 0x0f: /* FTAN */
		ftan_rr(dreg,sreg);
		break;
	    case 0x10: /* FETOX */
		fetox_rr(dreg,sreg);
		break;
	    case 0x11: /* FTWOTOX */
		ftwotox_rr(dreg,sreg);
		break;
	    case 0x12: /* FTENTOX */
		ftentox_rr(dreg,sreg);
		break;
	    case 0x14: /* FLOGN */
		flogN_rr(dreg,sreg);
		break;
	    case 0x15: /* FLOG10 */
		flog10_rr(dreg,sreg);
		break;
	    case 0x16: /* FLOG2 */
		flog2_rr(dreg,sreg);
		break;
	    case 0x18: /* FABS */
		fabs_rr(dreg,sreg);
		break;
	    case 0x19: /* FCOSH */
		fcosh_rr(dreg,sreg);
		break;
	    case 0x1a: /* FNEG */
		fneg_rr(dreg,sreg);
		break;
	    case 0x1c: /* FACOS */
#if USE_X86_FPUCW
		if ((regs.fpcr & 0x30) != 0x10) { /* use round to zero */
		    mov_l_ri(S1,(regs.fpcr & 0xC0) | 0x10);
		    fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    facos_rr(dreg,sreg);
		    mov_l_rm(S1,(uae_u32)&regs.fpcr);
		    and_l_ri(S1,0xf0); /* restore control word */
		    fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    break;
		}
#endif
		facos_rr(dreg,sreg);
		break;
	    case 0x1d: /* FCOS */
		fcos_rr(dreg,sreg);
		break;
	    case 0x1e: /* FGETEXP */
		fgetexp_rr(dreg,sreg);
		break;
	    case 0x1f: /* FGETMAN */
		fgetman_rr(dreg,sreg);
		break;
	    case 0x20: /* FDIV */
		fdiv_rr(dreg,sreg);
		break;
	    case 0x21: /* FMOD */
		frem_rr(dreg,sreg);
		break;
	    case 0x22: /* FADD */
		fadd_rr(dreg,sreg);
		break;
	    case 0x23: /* FMUL */
		fmul_rr(dreg,sreg);
		break;
	    case 0x24: /* FSGLDIV  is not exactly the same as FSDIV, */
		/* because both operands should be SINGLE precision, too */
	    case 0x60: /* FSDIV */
		fdiv_rr(dreg,sreg);
		if (!currprefs.fpu_strict) /* faster, but less strict rounding */
		    break;
#if USE_X86_FPUCW
		if ((regs.fpcr & 0xC0) == 0x40) /* if SINGLE precision */
		    break;
#endif
		fcuts_r(dreg);
		break;
	    case 0x25: /* FREM */
		frem1_rr(dreg,sreg);
		break;
	    case 0x26: /* FSCALE */
		fscale_rr(dreg,sreg);
		break;
	    case 0x27: /* FSGLMUL is not exactly the same as FSMUL, */
		/* because both operands should be SINGLE precision, too */
	    case 0x63: /* FSMUL */
		fmul_rr(dreg,sreg);
		if (!currprefs.fpu_strict) /* faster, but less strict rounding */
		    break;
#if USE_X86_FPUCW
		if ((regs.fpcr & 0xC0) == 0x40) /* if SINGLE precision */
		    break;
#endif
		fcuts_r(dreg);
		break;
	    case 0x28: /* FSUB */
		fsub_rr(dreg,sreg);
		break;
	    case 0x30: /* FSINCOS */
	    case 0x31:
	    case 0x32:
	    case 0x33:
	    case 0x34:
	    case 0x35:
	    case 0x36:
	    case 0x37:
		if (dreg == (extra & 7))
		    fsin_rr(dreg, sreg);
		else
		    fsincos_rr(dreg, extra & 7, sreg);
		break;
	    case 0x38: /* FCMP */
		fmov_rr(FP_RESULT,dreg);
		fsub_rr(FP_RESULT,sreg);
		return;
	    case 0x3a: /* FTST */
		fmov_rr(FP_RESULT,sreg);
		return;
	    case 0x40: /* FSMOVE */
		if (prec == 1 || !currprefs.fpu_strict) {
		    if (sreg != dreg) /* no <EA> */
			fmov_rr(dreg,sreg);
		} else {
		    fmovs_mr((uae_u32)temp_fp,sreg);
		    fmovs_rm(dreg,(uae_u32)temp_fp);
		}
		break;
	    case 0x41: /* FSSQRT */
		fsqrt_rr(dreg,sreg);
		if (!currprefs.fpu_strict) /* faster, but less strict rounding */
		    break;
#if USE_X86_FPUCW
		if ((regs.fpcr & 0xC0) == 0x40) /* if SINGLE precision */
		    break;
#endif
		fcuts_r(dreg);
		break;
	    case 0x44: /* FDMOVE */
		if (prec || !currprefs.fpu_strict) {
		    if (sreg != dreg) /* no <EA> */
		        fmov_rr(dreg,sreg);
		} else {
		    fmov_mr((uae_u32)temp_fp,sreg);
		    fmov_rm(dreg,(uae_u32)temp_fp);
		}
		break;
	    case 0x45: /* FDSQRT */
		if (!currprefs.fpu_strict) { /* faster, but less strict rounding */
		    fsqrt_rr(dreg,sreg);
		    break;
		}
#if USE_X86_FPUCW
		if (regs.fpcr & 0xC0) { /* if we don't have EXTENDED precision */
		    if ((regs.fpcr & 0xC0) == 0x80) /* if we have DOUBLE */
			fsqrt_rr(dreg,sreg);
		    else { /* if we have SINGLE presision, force DOUBLE */
			mov_l_ri(S1,(regs.fpcr & 0x30) | 0x80);
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
			fsqrt_rr(dreg,sreg);
			mov_l_rm(S1,(uae_u32)&regs.fpcr);
			and_l_ri(S1,0xf0); /* restore control word */
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    }
		    break;
		}
#endif		/* in case of EXTENDED precision, just reduce the result to DOUBLE */
		fsqrt_rr(dreg,sreg);
		fcut_r(dreg);
		break;
	    case 0x58: /* FSABS */
		fabs_rr(dreg,sreg);
		if (prec != 1 && currprefs.fpu_strict)
		    fcuts_r(dreg);
		break;
	    case 0x5a: /* FSNEG */
		fneg_rr(dreg,sreg);
		if (prec != 1 && currprefs.fpu_strict)
		    fcuts_r(dreg);
		break;
	    case 0x5c: /* FDABS */
		fabs_rr(dreg,sreg);
		if (!prec && currprefs.fpu_strict)
		    fcut_r(dreg);
		break;
	    case 0x5e: /* FDNEG */
		fneg_rr(dreg,sreg);
		if (!prec && currprefs.fpu_strict)
		    fcut_r(dreg);
		break;
	    case 0x62: /* FSADD */
		fadd_rr(dreg,sreg);
		if (!currprefs.fpu_strict) /* faster, but less strict rounding */
		    break;
#if USE_X86_FPUCW
		if ((regs.fpcr & 0xC0) == 0x40) /* if SINGLE precision */
		    break;
#endif
		fcuts_r(dreg);
		break;
	    case 0x64: /* FDDIV */
		if (!currprefs.fpu_strict) { /* faster, but less strict rounding */
		    fdiv_rr(dreg,sreg);
		    break;
		}
#if USE_X86_FPUCW
		if (regs.fpcr & 0xC0) { /* if we don't have EXTENDED precision */
		    if ((regs.fpcr & 0xC0) == 0x80) /* if we have DOUBLE */
			fdiv_rr(dreg,sreg);
		    else { /* if we have SINGLE presision, force DOUBLE */
			mov_l_ri(S1,(regs.fpcr & 0x30) | 0x80);
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
			fdiv_rr(dreg,sreg);
			mov_l_rm(S1,(uae_u32)&regs.fpcr);
			and_l_ri(S1,0xf0); /* restore control word */
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    }
		    break;
		}
#endif		/* in case of EXTENDED precision, just reduce the result to DOUBLE */
		fdiv_rr(dreg,sreg);
		fcut_r(dreg);
		break;
	    case 0x66: /* FDADD */
		if (!currprefs.fpu_strict) { /* faster, but less strict rounding */
		    fadd_rr(dreg,sreg);
		    break;
		}
#if USE_X86_FPUCW
		if (regs.fpcr & 0xC0) { /* if we don't have EXTENDED precision */
		    if ((regs.fpcr & 0xC0) == 0x80) /* if we have DOUBLE */
			fadd_rr(dreg,sreg);
		    else { /* if we have SINGLE presision, force DOUBLE */
			mov_l_ri(S1,(regs.fpcr & 0x30) | 0x80);
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
			fadd_rr(dreg,sreg);
			mov_l_rm(S1,(uae_u32)&regs.fpcr);
			and_l_ri(S1,0xf0); /* restore control word */
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    }
		    break;
		}
#endif		/* in case of EXTENDED precision, just reduce the result to DOUBLE */
		fadd_rr(dreg,sreg);
		fcut_r(dreg);
		break;
	    case 0x67: /* FDMUL */
		if (!currprefs.fpu_strict) { /* faster, but less strict rounding */
		    fmul_rr(dreg,sreg);
		    break;
		}
#if USE_X86_FPUCW
		if (regs.fpcr & 0xC0) { /* if we don't have EXTENDED precision */
		    if ((regs.fpcr & 0xC0) == 0x80) /* if we have DOUBLE */
			fmul_rr(dreg,sreg);
		    else { /* if we have SINGLE presision, force DOUBLE */
			mov_l_ri(S1,(regs.fpcr & 0x30) | 0x80);
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
			fmul_rr(dreg,sreg);
			mov_l_rm(S1,(uae_u32)&regs.fpcr);
			and_l_ri(S1,0xf0); /* restore control word */
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    }
		    break;
		}
#endif		/* in case of EXTENDED precision, just reduce the result to DOUBLE */
		fmul_rr(dreg,sreg);
		fcut_r(dreg);
		break;
	    case 0x68: /* FSSUB */
		fsub_rr(dreg,sreg);
		if (!currprefs.fpu_strict) /* faster, but less strict rounding */
		    break;
#if USE_X86_FPUCW
		if ((regs.fpcr & 0xC0) == 0x40) /* if SINGLE precision */
		    break;
#endif
		fcuts_r(dreg);
		break;
	    case 0x6c: /* FDSUB */
		if (!currprefs.fpu_strict) { /* faster, but less strict rounding */
		    fsub_rr(dreg,sreg);
		    break;
		}
#if USE_X86_FPUCW
		if (regs.fpcr & 0xC0) { /* if we don't have EXTENDED precision */
		    if ((regs.fpcr & 0xC0) == 0x80) /* if we have DOUBLE */
			fsub_rr(dreg,sreg);
		    else { /* if we have SINGLE presision, force DOUBLE */
			mov_l_ri(S1,(regs.fpcr & 0x30) | 0x80);
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
			fsub_rr(dreg,sreg);
			mov_l_rm(S1,(uae_u32)&regs.fpcr);
			and_l_ri(S1,0xf0); /* restore control word */
			fldcw_m_indexed(S1,(uae_u32)x86_fpucw);
		    }
		    break;
		}
#endif		/* in case of EXTENDED precision, just reduce the result to DOUBLE */
		fsub_rr(dreg,sreg);
		fcut_r(dreg);
		break;
	    default:
		FAIL(1);
		return;
	}
	fmov_rr(FP_RESULT,dreg);
	return;
     default:
	write_log ("Unsupported JIT-FPU instruction: 0x%04x %04x\n",opcode,extra);
	FAIL(1);
	return;
    }
}
#endif
