289 lines
6.1 KiB
C
289 lines
6.1 KiB
C
/*
|
|
NetWinder Floating Point Emulator
|
|
(c) Rebel.COM, 1998,1999
|
|
|
|
Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
|
|
|
|
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 2 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, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include "fpa11.h"
|
|
#include "softfloat.h"
|
|
#include "fpopcode.h"
|
|
|
|
float64 float64_exp(float64 Fm);
|
|
float64 float64_ln(float64 Fm);
|
|
float64 float64_sin(float64 rFm);
|
|
float64 float64_cos(float64 rFm);
|
|
float64 float64_arcsin(float64 rFm);
|
|
float64 float64_arctan(float64 rFm);
|
|
float64 float64_log(float64 rFm);
|
|
float64 float64_tan(float64 rFm);
|
|
float64 float64_arccos(float64 rFm);
|
|
float64 float64_pow(float64 rFn,float64 rFm);
|
|
float64 float64_pol(float64 rFn,float64 rFm);
|
|
|
|
unsigned int DoubleCPDO(const unsigned int opcode)
|
|
{
|
|
FPA11 *fpa11 = GET_FPA11();
|
|
float64 rFm, rFn = 0; //FIXME - should be zero?
|
|
unsigned int Fd, Fm, Fn, nRc = 1;
|
|
|
|
//printk("DoubleCPDO(0x%08x)\n",opcode);
|
|
|
|
Fm = getFm(opcode);
|
|
if (CONSTANT_FM(opcode))
|
|
{
|
|
rFm = getDoubleConstant(Fm);
|
|
}
|
|
else
|
|
{
|
|
switch (fpa11->fType[Fm])
|
|
{
|
|
case typeSingle:
|
|
rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle);
|
|
break;
|
|
|
|
case typeDouble:
|
|
rFm = fpa11->fpreg[Fm].fDouble;
|
|
break;
|
|
|
|
case typeExtended:
|
|
// !! patb
|
|
//printk("not implemented! why not?\n");
|
|
//!! ScottB
|
|
// should never get here, if extended involved
|
|
// then other operand should be promoted then
|
|
// ExtendedCPDO called.
|
|
break;
|
|
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
if (!MONADIC_INSTRUCTION(opcode))
|
|
{
|
|
Fn = getFn(opcode);
|
|
switch (fpa11->fType[Fn])
|
|
{
|
|
case typeSingle:
|
|
rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle);
|
|
break;
|
|
|
|
case typeDouble:
|
|
rFn = fpa11->fpreg[Fn].fDouble;
|
|
break;
|
|
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
Fd = getFd(opcode);
|
|
/* !! this switch isn't optimized; better (opcode & MASK_ARITHMETIC_OPCODE)>>24, sort of */
|
|
switch (opcode & MASK_ARITHMETIC_OPCODE)
|
|
{
|
|
/* dyadic opcodes */
|
|
case ADF_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_add(rFn,rFm);
|
|
break;
|
|
|
|
case MUF_CODE:
|
|
case FML_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_mul(rFn,rFm);
|
|
break;
|
|
|
|
case SUF_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_sub(rFn,rFm);
|
|
break;
|
|
|
|
case RSF_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_sub(rFm,rFn);
|
|
break;
|
|
|
|
case DVF_CODE:
|
|
case FDV_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_div(rFn,rFm);
|
|
break;
|
|
|
|
case RDF_CODE:
|
|
case FRD_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_div(rFm,rFn);
|
|
break;
|
|
|
|
#if 0
|
|
case POW_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_pow(rFn,rFm);
|
|
break;
|
|
|
|
case RPW_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_pow(rFm,rFn);
|
|
break;
|
|
#endif
|
|
|
|
case RMF_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_rem(rFn,rFm);
|
|
break;
|
|
|
|
#if 0
|
|
case POL_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_pol(rFn,rFm);
|
|
break;
|
|
#endif
|
|
|
|
/* monadic opcodes */
|
|
case MVF_CODE:
|
|
fpa11->fpreg[Fd].fDouble = rFm;
|
|
break;
|
|
|
|
case MNF_CODE:
|
|
{
|
|
unsigned int *p = (unsigned int*)&rFm;
|
|
p[1] ^= 0x80000000;
|
|
fpa11->fpreg[Fd].fDouble = rFm;
|
|
}
|
|
break;
|
|
|
|
case ABS_CODE:
|
|
{
|
|
unsigned int *p = (unsigned int*)&rFm;
|
|
p[1] &= 0x7fffffff;
|
|
fpa11->fpreg[Fd].fDouble = rFm;
|
|
}
|
|
break;
|
|
|
|
case RND_CODE:
|
|
case URD_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_round_to_int(rFm);
|
|
break;
|
|
|
|
case SQT_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_sqrt(rFm);
|
|
break;
|
|
|
|
#if 0
|
|
case LOG_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_log(rFm);
|
|
break;
|
|
|
|
case LGN_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_ln(rFm);
|
|
break;
|
|
|
|
case EXP_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_exp(rFm);
|
|
break;
|
|
|
|
case SIN_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_sin(rFm);
|
|
break;
|
|
|
|
case COS_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_cos(rFm);
|
|
break;
|
|
|
|
case TAN_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_tan(rFm);
|
|
break;
|
|
|
|
case ASN_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_arcsin(rFm);
|
|
break;
|
|
|
|
case ACS_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_arccos(rFm);
|
|
break;
|
|
|
|
case ATN_CODE:
|
|
fpa11->fpreg[Fd].fDouble = float64_arctan(rFm);
|
|
break;
|
|
#endif
|
|
|
|
case NRM_CODE:
|
|
break;
|
|
|
|
default:
|
|
{
|
|
nRc = 0;
|
|
}
|
|
}
|
|
|
|
if (0 != nRc) fpa11->fType[Fd] = typeDouble;
|
|
return nRc;
|
|
}
|
|
|
|
#if 0
|
|
float64 float64_exp(float64 rFm)
|
|
{
|
|
return rFm;
|
|
//series
|
|
}
|
|
|
|
float64 float64_ln(float64 rFm)
|
|
{
|
|
return rFm;
|
|
//series
|
|
}
|
|
|
|
float64 float64_sin(float64 rFm)
|
|
{
|
|
return rFm;
|
|
//series
|
|
}
|
|
|
|
float64 float64_cos(float64 rFm)
|
|
{
|
|
return rFm;
|
|
//series
|
|
}
|
|
|
|
#if 0
|
|
float64 float64_arcsin(float64 rFm)
|
|
{
|
|
//series
|
|
}
|
|
|
|
float64 float64_arctan(float64 rFm)
|
|
{
|
|
//series
|
|
}
|
|
#endif
|
|
|
|
float64 float64_log(float64 rFm)
|
|
{
|
|
return float64_div(float64_ln(rFm),getDoubleConstant(7));
|
|
}
|
|
|
|
float64 float64_tan(float64 rFm)
|
|
{
|
|
return float64_div(float64_sin(rFm),float64_cos(rFm));
|
|
}
|
|
|
|
float64 float64_arccos(float64 rFm)
|
|
{
|
|
return rFm;
|
|
//return float64_sub(halfPi,float64_arcsin(rFm));
|
|
}
|
|
|
|
float64 float64_pow(float64 rFn,float64 rFm)
|
|
{
|
|
return float64_exp(float64_mul(rFm,float64_ln(rFn)));
|
|
}
|
|
|
|
float64 float64_pol(float64 rFn,float64 rFm)
|
|
{
|
|
return float64_arctan(float64_div(rFn,rFm));
|
|
}
|
|
#endif
|