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112 lines
2.8 KiB
112 lines
2.8 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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NetWinder Floating Point Emulator |
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(c) Rebel.COM, 1998,1999 |
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(c) Philip Blundell, 2001 |
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Direct questions, comments to Scott Bambrough <[email protected]> |
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*/ |
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#include "fpa11.h" |
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#include "softfloat.h" |
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#include "fpopcode.h" |
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float32 float32_exp(float32 Fm); |
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float32 float32_ln(float32 Fm); |
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float32 float32_sin(float32 rFm); |
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float32 float32_cos(float32 rFm); |
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float32 float32_arcsin(float32 rFm); |
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float32 float32_arctan(float32 rFm); |
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float32 float32_log(float32 rFm); |
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float32 float32_tan(float32 rFm); |
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float32 float32_arccos(float32 rFm); |
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float32 float32_pow(float32 rFn, float32 rFm); |
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float32 float32_pol(float32 rFn, float32 rFm); |
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static float32 float32_rsf(struct roundingData *roundData, float32 rFn, float32 rFm) |
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{ |
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return float32_sub(roundData, rFm, rFn); |
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} |
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static float32 float32_rdv(struct roundingData *roundData, float32 rFn, float32 rFm) |
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{ |
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return float32_div(roundData, rFm, rFn); |
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} |
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static float32 (*const dyadic_single[16])(struct roundingData *, float32 rFn, float32 rFm) = { |
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[ADF_CODE >> 20] = float32_add, |
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[MUF_CODE >> 20] = float32_mul, |
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[SUF_CODE >> 20] = float32_sub, |
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[RSF_CODE >> 20] = float32_rsf, |
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[DVF_CODE >> 20] = float32_div, |
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[RDF_CODE >> 20] = float32_rdv, |
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[RMF_CODE >> 20] = float32_rem, |
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[FML_CODE >> 20] = float32_mul, |
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[FDV_CODE >> 20] = float32_div, |
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[FRD_CODE >> 20] = float32_rdv, |
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}; |
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static float32 float32_mvf(struct roundingData *roundData, float32 rFm) |
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{ |
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return rFm; |
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} |
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static float32 float32_mnf(struct roundingData *roundData, float32 rFm) |
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{ |
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return rFm ^ 0x80000000; |
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} |
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static float32 float32_abs(struct roundingData *roundData, float32 rFm) |
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{ |
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return rFm & 0x7fffffff; |
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} |
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static float32 (*const monadic_single[16])(struct roundingData*, float32 rFm) = { |
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[MVF_CODE >> 20] = float32_mvf, |
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[MNF_CODE >> 20] = float32_mnf, |
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[ABS_CODE >> 20] = float32_abs, |
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[RND_CODE >> 20] = float32_round_to_int, |
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[URD_CODE >> 20] = float32_round_to_int, |
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[SQT_CODE >> 20] = float32_sqrt, |
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[NRM_CODE >> 20] = float32_mvf, |
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}; |
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unsigned int SingleCPDO(struct roundingData *roundData, const unsigned int opcode, FPREG * rFd) |
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{ |
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FPA11 *fpa11 = GET_FPA11(); |
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float32 rFm; |
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unsigned int Fm, opc_mask_shift; |
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Fm = getFm(opcode); |
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if (CONSTANT_FM(opcode)) { |
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rFm = getSingleConstant(Fm); |
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} else if (fpa11->fType[Fm] == typeSingle) { |
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rFm = fpa11->fpreg[Fm].fSingle; |
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} else { |
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return 0; |
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} |
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opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20; |
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if (!MONADIC_INSTRUCTION(opcode)) { |
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unsigned int Fn = getFn(opcode); |
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float32 rFn; |
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if (fpa11->fType[Fn] == typeSingle && |
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dyadic_single[opc_mask_shift]) { |
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rFn = fpa11->fpreg[Fn].fSingle; |
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rFd->fSingle = dyadic_single[opc_mask_shift](roundData, rFn, rFm); |
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} else { |
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return 0; |
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} |
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} else { |
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if (monadic_single[opc_mask_shift]) { |
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rFd->fSingle = monadic_single[opc_mask_shift](roundData, rFm); |
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} else { |
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return 0; |
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} |
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} |
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return 1; |
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}
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