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/* @(#) pfinnrfp.h 98/02/26 1.4 */
/***************************************************************
** Compile FP routines.
** This file is included from "pf_inner.c"
**
** These routines could be left out of an execute only version.
**
** Author: Darren Gibbs, Phil Burk
** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
**
** Permission to use, copy, modify, and/or distribute this
** software for any purpose with or without fee is hereby granted.
**
** THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
** WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
** WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
** THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
** CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
** FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
** CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
** OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
**
****************************************************************
**
***************************************************************/
#ifdef PF_SUPPORT_FP
#define FP_DHI1 (((PF_FLOAT)((cell_t)1<<(sizeof(cell_t)*8-2)))*4.0)
case ID_FP_D_TO_F: /* ( dlo dhi -- ) ( F: -- r ) */
PUSH_FP_TOS;
Scratch = M_POP; /* dlo */
DBUG(("dlo = 0x%8x , ", Scratch));
DBUG(("dhi = 0x%8x\n", TOS));
if( ((TOS == 0) && (Scratch >= 0)) ||
((TOS == -1) && (Scratch < 0)))
{
/* <= 32 bit precision. */
FP_TOS = ((PF_FLOAT) Scratch); /* Convert dlo and push on FP stack. */
}
else /* > 32 bit precision. */
{
fpTemp = ((PF_FLOAT) TOS); /* dhi */
fpTemp *= FP_DHI1;
fpScratch = ( (PF_FLOAT) ((ucell_t)Scratch) ); /* Convert TOS and push on FP stack. */
FP_TOS = fpTemp + fpScratch;
}
M_DROP;
/* printf("d2f = %g\n", FP_TOS); */
break;
case ID_FP_FSTORE: /* ( addr -- ) ( F: r -- ) */
#if (defined(PF_BIG_ENDIAN_DIC) || defined(PF_LITTLE_ENDIAN_DIC))
if( IN_CODE_DIC(TOS) )
{
WRITE_FLOAT_DIC( (PF_FLOAT *) TOS, FP_TOS );
}
else
{
*((PF_FLOAT *) TOS) = FP_TOS;
}
#else
*((PF_FLOAT *) TOS) = FP_TOS;
#endif
M_FP_DROP; /* drop FP value */
M_DROP; /* drop addr */
break;
case ID_FP_FTIMES: /* ( F: r1 r2 -- r1*r2 ) */
FP_TOS = M_FP_POP * FP_TOS;
break;
case ID_FP_FPLUS: /* ( F: r1 r2 -- r1+r2 ) */
FP_TOS = M_FP_POP + FP_TOS;
break;
case ID_FP_FMINUS: /* ( F: r1 r2 -- r1-r2 ) */
FP_TOS = M_FP_POP - FP_TOS;
break;
case ID_FP_FSLASH: /* ( F: r1 r2 -- r1/r2 ) */
FP_TOS = M_FP_POP / FP_TOS;
break;
case ID_FP_F_ZERO_LESS_THAN: /* ( -- flag ) ( F: r -- ) */
PUSH_TOS;
TOS = (FP_TOS < 0.0) ? FTRUE : FFALSE ;
M_FP_DROP;
break;
case ID_FP_F_ZERO_EQUALS: /* ( -- flag ) ( F: r -- ) */
PUSH_TOS;
TOS = (FP_TOS == 0.0) ? FTRUE : FFALSE ;
M_FP_DROP;
break;
case ID_FP_F_LESS_THAN: /* ( -- flag ) ( F: r1 r2 -- ) */
PUSH_TOS;
TOS = (M_FP_POP < FP_TOS) ? FTRUE : FFALSE ;
M_FP_DROP;
break;
case ID_FP_F_TO_D: /* ( -- dlo dhi) ( F: r -- ) */
/* printf("f2d = %g\n", FP_TOS); */
{
ucell_t dlo;
cell_t dhi;
int ifNeg;
/* Convert absolute value, then negate D if negative. */
PUSH_TOS; /* Save old TOS */
fpTemp = FP_TOS;
M_FP_DROP;
ifNeg = (fpTemp < 0.0);
if( ifNeg )
{
fpTemp = 0.0 - fpTemp;
}
fpScratch = fpTemp / FP_DHI1;
/* printf("f2d - fpScratch = %g\n", fpScratch); */
dhi = (cell_t) fpScratch; /* dhi */
fpScratch = ((PF_FLOAT) dhi) * FP_DHI1;
/* printf("f2d - , dhi = 0x%x, fpScratch = %g\n", dhi, fpScratch); */
fpTemp = fpTemp - fpScratch; /* Remainder */
dlo = (ucell_t) fpTemp;
/* printf("f2d - , dlo = 0x%x, fpTemp = %g\n", dlo, fpTemp); */
if( ifNeg )
{
dlo = 0 - dlo;
dhi = 0 - dhi - 1;
}
/* Push onto stack. */
TOS = dlo;
PUSH_TOS;
TOS = dhi;
}
break;
case ID_FP_FFETCH: /* ( addr -- ) ( F: -- r ) */
PUSH_FP_TOS;
#if (defined(PF_BIG_ENDIAN_DIC) || defined(PF_LITTLE_ENDIAN_DIC))
if( IN_CODE_DIC(TOS) )
{
FP_TOS = READ_FLOAT_DIC( (PF_FLOAT *) TOS );
}
else
{
FP_TOS = *((PF_FLOAT *) TOS);
}
#else
FP_TOS = *((PF_FLOAT *) TOS);
#endif
M_DROP;
break;
case ID_FP_FDEPTH: /* ( -- n ) ( F: -- ) */
PUSH_TOS;
/* Add 1 to account for FP_TOS in cached in register. */
TOS = (( M_FP_SPZERO - FP_STKPTR) + 1);
break;
case ID_FP_FDROP: /* ( -- ) ( F: r -- ) */
M_FP_DROP;
break;
case ID_FP_FDUP: /* ( -- ) ( F: r -- r r ) */
PUSH_FP_TOS;
break;
case ID_FP_FLOAT_PLUS: /* ( addr1 -- addr2 ) ( F: -- ) */
TOS = TOS + sizeof(PF_FLOAT);
break;
case ID_FP_FLOATS: /* ( n -- size ) ( F: -- ) */
TOS = TOS * sizeof(PF_FLOAT);
break;
case ID_FP_FLOOR: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_floor( FP_TOS );
break;
case ID_FP_FMAX: /* ( -- ) ( F: r1 r2 -- r3 ) */
fpScratch = M_FP_POP;
FP_TOS = ( FP_TOS > fpScratch ) ? FP_TOS : fpScratch ;
break;
case ID_FP_FMIN: /* ( -- ) ( F: r1 r2 -- r3 ) */
fpScratch = M_FP_POP;
FP_TOS = ( FP_TOS < fpScratch ) ? FP_TOS : fpScratch ;
break;
case ID_FP_FNEGATE:
FP_TOS = -FP_TOS;
break;
case ID_FP_FOVER: /* ( -- ) ( F: r1 r2 -- r1 r2 r1 ) */
PUSH_FP_TOS;
FP_TOS = M_FP_STACK(1);
break;
case ID_FP_FROT: /* ( -- ) ( F: r1 r2 r3 -- r2 r3 r1 ) */
fpScratch = M_FP_POP; /* r2 */
fpTemp = M_FP_POP; /* r1 */
M_FP_PUSH( fpScratch ); /* r2 */
PUSH_FP_TOS; /* r3 */
FP_TOS = fpTemp; /* r1 */
break;
case ID_FP_FROUND:
/* This was broken before and used to push its result to the
* integer data stack! Now it conforms to the ANSI standard.
* https://github.com/philburk/pforth/issues/69
*/
FP_TOS = (PF_FLOAT)fp_round(FP_TOS);
break;
case ID_FP_FSWAP: /* ( -- ) ( F: r1 r2 -- r2 r1 ) */
fpScratch = FP_TOS;
FP_TOS = *FP_STKPTR;
*FP_STKPTR = fpScratch;
break;
case ID_FP_FSTAR_STAR: /* ( -- ) ( F: r1 r2 -- r1^r2 ) */
fpScratch = M_FP_POP;
FP_TOS = (PF_FLOAT) fp_pow(fpScratch, FP_TOS);
break;
case ID_FP_FABS: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_fabs( FP_TOS );
break;
case ID_FP_FACOS: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_acos( FP_TOS );
break;
case ID_FP_FACOSH: /* ( -- ) ( F: r1 -- r2 ) */
/* fp_acosh(x) = fp_log(y + sqrt(y^2 - 1) */
FP_TOS = (PF_FLOAT) fp_log(FP_TOS + (fp_sqrt((FP_TOS * FP_TOS) - 1)));
break;
case ID_FP_FALOG: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_pow(10.0,FP_TOS);
break;
case ID_FP_FASIN: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_asin( FP_TOS );
break;
case ID_FP_FASINH: /* ( -- ) ( F: r1 -- r2 ) */
/* asinh(x) = fp_log(y + fp_sqrt(y^2 + 1) */
FP_TOS = (PF_FLOAT) fp_log(FP_TOS + (fp_sqrt((FP_TOS * FP_TOS) + 1)));
break;
case ID_FP_FATAN: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_atan( FP_TOS );
break;
case ID_FP_FATAN2: /* ( -- ) ( F: r1 r2 -- atan(r1/r2) ) */
fpTemp = M_FP_POP;
FP_TOS = (PF_FLOAT) fp_atan2( fpTemp, FP_TOS );
break;
case ID_FP_FATANH: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) (0.5 * fp_log((1 + FP_TOS) / (1 - FP_TOS)));
break;
case ID_FP_FCOS: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_cos( FP_TOS );
break;
case ID_FP_FCOSH: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_cosh( FP_TOS );
break;
#ifndef PF_NO_SHELL
case ID_FP_FLITERAL:
ffFPLiteral( FP_TOS );
M_FP_DROP;
endcase;
#endif /* !PF_NO_SHELL */
case ID_FP_FLITERAL_P:
PUSH_FP_TOS;
#if 0
/* Some wimpy compilers can't handle this! */
FP_TOS = *(((PF_FLOAT *)InsPtr)++);
#else
{
PF_FLOAT *fptr;
fptr = (PF_FLOAT *)InsPtr;
FP_TOS = READ_FLOAT_DIC( fptr++ );
InsPtr = (cell_t *) fptr;
}
#endif
endcase;
case ID_FP_FLN: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_log(FP_TOS);
break;
case ID_FP_FLNP1: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) (fp_log(FP_TOS) + 1.0);
break;
case ID_FP_FLOG: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_log10( FP_TOS );
break;
case ID_FP_FSIN: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_sin( FP_TOS );
break;
case ID_FP_FSINCOS: /* ( -- ) ( F: r1 -- r2 r3 ) */
M_FP_PUSH((PF_FLOAT) fp_sin(FP_TOS));
FP_TOS = (PF_FLOAT) fp_cos(FP_TOS);
break;
case ID_FP_FSINH: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_sinh( FP_TOS );
break;
case ID_FP_FSQRT: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_sqrt( FP_TOS );
break;
case ID_FP_FTAN: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_tan( FP_TOS );
break;
case ID_FP_FTANH: /* ( -- ) ( F: r1 -- r2 ) */
FP_TOS = (PF_FLOAT) fp_tanh( FP_TOS );
break;
case ID_FP_FPICK: /* ( n -- ) ( F: -- f[n] ) */
PUSH_FP_TOS; /* push cached floats into RAM */
FP_TOS = FP_STKPTR[TOS]; /* 0 FPICK gets top of FP stack */
M_DROP;
break;
#endif
|
