/* 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); static floatx80 floatx80_rsf(struct roundingData *roundData, floatx80 rFn, floatx80 rFm) { return floatx80_sub(roundData, rFm, rFn); } static floatx80 floatx80_rdv(struct roundingData *roundData, floatx80 rFn, floatx80 rFm) { return floatx80_div(roundData, rFm, rFn); } static floatx80 (*const dyadic_extended[16])(struct roundingData*, floatx80 rFn, floatx80 rFm) = { [ADF_CODE >> 20] = floatx80_add, [MUF_CODE >> 20] = floatx80_mul, [SUF_CODE >> 20] = floatx80_sub, [RSF_CODE >> 20] = floatx80_rsf, [DVF_CODE >> 20] = floatx80_div, [RDF_CODE >> 20] = floatx80_rdv, [RMF_CODE >> 20] = floatx80_rem, /* strictly, these opcodes should not be implemented */ [FML_CODE >> 20] = floatx80_mul, [FDV_CODE >> 20] = floatx80_div, [FRD_CODE >> 20] = floatx80_rdv, }; static floatx80 floatx80_mvf(struct roundingData *roundData, floatx80 rFm) { return rFm; } static floatx80 floatx80_mnf(struct roundingData *roundData, floatx80 rFm) { rFm.high ^= 0x8000; return rFm; } static floatx80 floatx80_abs(struct roundingData *roundData, floatx80 rFm) { rFm.high &= 0x7fff; return rFm; } static floatx80 (*const monadic_extended[16])(struct roundingData*, floatx80 rFm) = { [MVF_CODE >> 20] = floatx80_mvf, [MNF_CODE >> 20] = floatx80_mnf, [ABS_CODE >> 20] = floatx80_abs, [RND_CODE >> 20] = floatx80_round_to_int, [URD_CODE >> 20] = floatx80_round_to_int, [SQT_CODE >> 20] = floatx80_sqrt, [NRM_CODE >> 20] = floatx80_mvf, }; unsigned int ExtendedCPDO(struct roundingData *roundData, const unsigned int opcode, FPREG * rFd) { FPA11 *fpa11 = GET_FPA11(); floatx80 rFm; unsigned int Fm, opc_mask_shift; 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; } } opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20; if (!MONADIC_INSTRUCTION(opcode)) { unsigned int Fn = getFn(opcode); floatx80 rFn; 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; } if (dyadic_extended[opc_mask_shift]) { rFd->fExtended = dyadic_extended[opc_mask_shift](roundData, rFn, rFm); } else { return 0; } } else { if (monadic_extended[opc_mask_shift]) { rFd->fExtended = monadic_extended[opc_mask_shift](roundData, rFm); } else { return 0; } } return 1; }