/* 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" union float64_components { float64 f64; unsigned int i[2]; }; 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); static float64 float64_rsf(struct roundingData *roundData, float64 rFn, float64 rFm) { return float64_sub(roundData, rFm, rFn); } static float64 float64_rdv(struct roundingData *roundData, float64 rFn, float64 rFm) { return float64_div(roundData, rFm, rFn); } static float64 (*const dyadic_double[16])(struct roundingData*, float64 rFn, float64 rFm) = { [ADF_CODE >> 20] = float64_add, [MUF_CODE >> 20] = float64_mul, [SUF_CODE >> 20] = float64_sub, [RSF_CODE >> 20] = float64_rsf, [DVF_CODE >> 20] = float64_div, [RDF_CODE >> 20] = float64_rdv, [RMF_CODE >> 20] = float64_rem, /* strictly, these opcodes should not be implemented */ [FML_CODE >> 20] = float64_mul, [FDV_CODE >> 20] = float64_div, [FRD_CODE >> 20] = float64_rdv, }; static float64 float64_mvf(struct roundingData *roundData,float64 rFm) { return rFm; } static float64 float64_mnf(struct roundingData *roundData,float64 rFm) { union float64_components u; u.f64 = rFm; #ifdef __ARMEB__ u.i[0] ^= 0x80000000; #else u.i[1] ^= 0x80000000; #endif return u.f64; } static float64 float64_abs(struct roundingData *roundData,float64 rFm) { union float64_components u; u.f64 = rFm; #ifdef __ARMEB__ u.i[0] &= 0x7fffffff; #else u.i[1] &= 0x7fffffff; #endif return u.f64; } static float64 (*const monadic_double[16])(struct roundingData *, float64 rFm) = { [MVF_CODE >> 20] = float64_mvf, [MNF_CODE >> 20] = float64_mnf, [ABS_CODE >> 20] = float64_abs, [RND_CODE >> 20] = float64_round_to_int, [URD_CODE >> 20] = float64_round_to_int, [SQT_CODE >> 20] = float64_sqrt, [NRM_CODE >> 20] = float64_mvf, }; unsigned int DoubleCPDO(struct roundingData *roundData, const unsigned int opcode, FPREG * rFd) { FPA11 *fpa11 = GET_FPA11(); float64 rFm; unsigned int Fm, opc_mask_shift; 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; default: return 0; } } opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20; if (!MONADIC_INSTRUCTION(opcode)) { unsigned int Fn = getFn(opcode); float64 rFn; 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; } if (dyadic_double[opc_mask_shift]) { rFd->fDouble = dyadic_double[opc_mask_shift](roundData, rFn, rFm); } else { return 0; } } else { if (monadic_double[opc_mask_shift]) { rFd->fDouble = monadic_double[opc_mask_shift](roundData, rFm); } else { return 0; } } return 1; }