extended_cpdo.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:6k
- /*
- 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"
- floatx80 floatx80_exp(floatx80 Fm);
- floatx80 floatx80_ln(floatx80 Fm);
- floatx80 floatx80_sin(floatx80 rFm);
- floatx80 floatx80_cos(floatx80 rFm);
- floatx80 floatx80_arcsin(floatx80 rFm);
- floatx80 floatx80_arctan(floatx80 rFm);
- floatx80 floatx80_log(floatx80 rFm);
- floatx80 floatx80_tan(floatx80 rFm);
- floatx80 floatx80_arccos(floatx80 rFm);
- floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm);
- floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm);
- unsigned int ExtendedCPDO(const unsigned int opcode)
- {
- FPA11 *fpa11 = GET_FPA11();
- floatx80 rFm, rFn;
- unsigned int Fd, Fm, Fn, nRc = 1;
- //printk("ExtendedCPDO(0x%08x)n",opcode);
-
- Fm = getFm(opcode);
- if (CONSTANT_FM(opcode))
- {
- rFm = getExtendedConstant(Fm);
- }
- else
- {
- switch (fpa11->fType[Fm])
- {
- case typeSingle:
- rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle);
- break;
- case typeDouble:
- rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble);
- break;
-
- case typeExtended:
- rFm = fpa11->fpreg[Fm].fExtended;
- break;
-
- default: return 0;
- }
- }
-
- if (!MONADIC_INSTRUCTION(opcode))
- {
- Fn = getFn(opcode);
- switch (fpa11->fType[Fn])
- {
- case typeSingle:
- rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
- break;
- case typeDouble:
- rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
- break;
-
- case typeExtended:
- rFn = fpa11->fpreg[Fn].fExtended;
- break;
-
- default: return 0;
- }
- }
- Fd = getFd(opcode);
- switch (opcode & MASK_ARITHMETIC_OPCODE)
- {
- /* dyadic opcodes */
- case ADF_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_add(rFn,rFm);
- break;
- case MUF_CODE:
- case FML_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_mul(rFn,rFm);
- break;
- case SUF_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_sub(rFn,rFm);
- break;
- case RSF_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_sub(rFm,rFn);
- break;
- case DVF_CODE:
- case FDV_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_div(rFn,rFm);
- break;
- case RDF_CODE:
- case FRD_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_div(rFm,rFn);
- break;
- #if 0
- case POW_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_pow(rFn,rFm);
- break;
- case RPW_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_pow(rFm,rFn);
- break;
- #endif
- case RMF_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_rem(rFn,rFm);
- break;
- #if 0
- case POL_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_pol(rFn,rFm);
- break;
- #endif
- /* monadic opcodes */
- case MVF_CODE:
- fpa11->fpreg[Fd].fExtended = rFm;
- break;
- case MNF_CODE:
- rFm.high ^= 0x8000;
- fpa11->fpreg[Fd].fExtended = rFm;
- break;
- case ABS_CODE:
- rFm.high &= 0x7fff;
- fpa11->fpreg[Fd].fExtended = rFm;
- break;
- case RND_CODE:
- case URD_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_round_to_int(rFm);
- break;
- case SQT_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_sqrt(rFm);
- break;
- #if 0
- case LOG_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_log(rFm);
- break;
- case LGN_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_ln(rFm);
- break;
- case EXP_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_exp(rFm);
- break;
- case SIN_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_sin(rFm);
- break;
- case COS_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_cos(rFm);
- break;
- case TAN_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_tan(rFm);
- break;
- case ASN_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_arcsin(rFm);
- break;
- case ACS_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_arccos(rFm);
- break;
- case ATN_CODE:
- fpa11->fpreg[Fd].fExtended = floatx80_arctan(rFm);
- break;
- #endif
- case NRM_CODE:
- break;
-
- default:
- {
- nRc = 0;
- }
- }
-
- if (0 != nRc) fpa11->fType[Fd] = typeExtended;
- return nRc;
- }
- #if 0
- floatx80 floatx80_exp(floatx80 Fm)
- {
- //series
- }
- floatx80 floatx80_ln(floatx80 Fm)
- {
- //series
- }
- floatx80 floatx80_sin(floatx80 rFm)
- {
- //series
- }
- floatx80 floatx80_cos(floatx80 rFm)
- {
- //series
- }
- floatx80 floatx80_arcsin(floatx80 rFm)
- {
- //series
- }
- floatx80 floatx80_arctan(floatx80 rFm)
- {
- //series
- }
- floatx80 floatx80_log(floatx80 rFm)
- {
- return floatx80_div(floatx80_ln(rFm),getExtendedConstant(7));
- }
- floatx80 floatx80_tan(floatx80 rFm)
- {
- return floatx80_div(floatx80_sin(rFm),floatx80_cos(rFm));
- }
- floatx80 floatx80_arccos(floatx80 rFm)
- {
- //return floatx80_sub(halfPi,floatx80_arcsin(rFm));
- }
- floatx80 floatx80_pow(floatx80 rFn,floatx80 rFm)
- {
- return floatx80_exp(floatx80_mul(rFm,floatx80_ln(rFn)));
- }
- floatx80 floatx80_pol(floatx80 rFn,floatx80 rFm)
- {
- return floatx80_arctan(floatx80_div(rFn,rFm));
- }
- #endif