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dpavlin |
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/* |
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* PearPC |
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* ppc_fpu.cc |
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* |
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* Copyright (C) 2003, 2004 Sebastian Biallas (sb@biallas.net) |
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* Copyright (C) 2003 Stefan Weyergraf |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#include "debug/tracers.h" |
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#include "ppc_cpu.h" |
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#include "ppc_dec.h" |
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#include "ppc_fpu.h" |
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// .121 |
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#define PPC_FPR_TYPE2(a,b) (((a)<<8)|(b)) |
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inline void ppc_fpu_add(ppc_double &res, ppc_double &a, ppc_double &b) |
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{ |
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switch (PPC_FPR_TYPE2(a.type, b.type)) { |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_norm): { |
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int diff = a.e - b.e; |
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if (diff<0) { |
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diff = -diff; |
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if (diff <= 56) { |
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a.m >>= diff; |
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} else if (a.m != 0) { |
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a.m = 1; |
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} else { |
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a.m = 0; |
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} |
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res.e = b.e; |
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} else { |
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if (diff <= 56) { |
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b.m >>= diff; |
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} else if (b.m != 0) { |
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b.m = 1; |
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} else { |
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b.m = 0; |
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} |
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res.e = a.e; |
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} |
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res.type = ppc_fpr_norm; |
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if (a.s == b.s) { |
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res.s = a.s; |
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res.m = a.m + b.m; |
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if (res.m & (1ULL<<56)) { |
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res.m >>= 1; |
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res.e++; |
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} |
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} else { |
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res.s = a.s; |
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res.m = a.m - b.m; |
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if (!res.m) { |
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if (FPSCR_RN(gCPU.fpscr) == FPSCR_RN_MINF) { |
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res.s |= b.s; |
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} else { |
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res.s &= b.s; |
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} |
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res.type = ppc_fpr_zero; |
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} else { |
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if ((sint64)res.m < 0) { |
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res.m = b.m - a.m; |
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res.s = b.s; |
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} |
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diff = ppc_fpu_normalize(res) - 8; |
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res.e -= diff; |
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res.m <<= diff; |
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} |
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} |
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break; |
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} |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_NaN): |
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res.s = a.s; |
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res.type = ppc_fpr_NaN; |
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break; |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_zero): |
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res.e = a.e; |
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// fall-thru |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_norm): |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_Inf): |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_zero): |
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res.s = a.s; |
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res.m = a.m; |
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res.type = a.type; |
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break; |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_norm): |
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res.e = b.e; |
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// fall-thru |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_NaN): |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_NaN): |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_NaN): |
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res.s = b.s; |
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res.m = b.m; |
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res.type = b.type; |
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break; |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_Inf): |
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if (a.s != b.s) { |
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// +oo + -oo == NaN |
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res.s = a.s ^ b.s; |
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res.type = ppc_fpr_NaN; |
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break; |
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} |
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// fall-thru |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_norm): |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_zero): |
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res.s = a.s; |
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res.type = a.type; |
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break; |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_Inf): |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_Inf): |
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res.s = b.s; |
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res.type = b.type; |
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break; |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_zero): |
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// round bla |
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res.type = ppc_fpr_zero; |
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res.s = a.s && b.s; |
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break; |
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} |
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} |
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inline void ppc_fpu_quadro_mshr(ppc_quadro &q, int exp) |
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{ |
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if (exp >= 64) { |
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q.m1 = q.m0; |
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q.m0 = 0; |
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exp -= 64; |
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} |
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uint64 t = q.m0 & ((1ULL<<exp)-1); |
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q.m0 >>= exp; |
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q.m1 >>= exp; |
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q.m1 |= t<<(64-exp); |
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} |
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inline void ppc_fpu_quadro_mshl(ppc_quadro &q, int exp) |
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{ |
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if (exp >= 64) { |
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q.m0 = q.m1; |
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q.m1 = 0; |
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exp -= 64; |
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} |
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uint64 t = (q.m1 >> (64-exp)) & ((1ULL<<exp)-1); |
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q.m0 <<= exp; |
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q.m1 <<= exp; |
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q.m0 |= t; |
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} |
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inline void ppc_fpu_add_quadro_m(ppc_quadro &res, const ppc_quadro &a, const ppc_quadro &b) |
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{ |
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res.m1 = a.m1+b.m1; |
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if (res.m1 < a.m1) { |
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res.m0 = a.m0+b.m0+1; |
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} else { |
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res.m0 = a.m0+b.m0; |
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} |
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} |
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inline void ppc_fpu_sub_quadro_m(ppc_quadro &res, const ppc_quadro &a, const ppc_quadro &b) |
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{ |
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res.m1 = a.m1-b.m1; |
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if (a.m1 < b.m1) { |
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res.m0 = a.m0-b.m0-1; |
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} else { |
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res.m0 = a.m0-b.m0; |
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} |
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} |
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// res has 107 significant bits. a, b have 106 significant bits each. |
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inline void ppc_fpu_add_quadro(ppc_quadro &res, ppc_quadro &a, ppc_quadro &b) |
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{ |
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// treat as 107 bit mantissa |
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if (a.type == ppc_fpr_norm) ppc_fpu_quadro_mshl(a, 1); |
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if (b.type == ppc_fpr_norm) ppc_fpu_quadro_mshl(b, 1); |
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switch (PPC_FPR_TYPE2(a.type, b.type)) { |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_norm): { |
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int diff = a.e - b.e; |
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if (diff < 0) { |
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diff = -diff; |
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if (diff <= 107) { |
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// FIXME: may set x_prime |
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ppc_fpu_quadro_mshr(a, diff); |
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} else if (a.m0 || a.m1) { |
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a.m0 = 0; |
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a.m1 = 1; |
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} else { |
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a.m0 = 0; |
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a.m1 = 0; |
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} |
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res.e = b.e; |
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} else { |
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if (diff <= 107) { |
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// FIXME: may set x_prime |
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ppc_fpu_quadro_mshr(b, diff); |
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} else if (b.m0 || b.m1) { |
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b.m0 = 0; |
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b.m1 = 1; |
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} else { |
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b.m0 = 0; |
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b.m1 = 0; |
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} |
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res.e = a.e; |
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} |
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res.type = ppc_fpr_norm; |
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if (a.s == b.s) { |
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res.s = a.s; |
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ppc_fpu_add_quadro_m(res, a, b); |
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int X_prime = res.m1 & 1; |
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if (res.m0 & (1ULL<<(107-64))) { |
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ppc_fpu_quadro_mshr(res, 1); |
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res.e++; |
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} |
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// res = [107] |
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res.m1 = (res.m1 & 0xfffffffffffffffeULL) | X_prime; |
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} else { |
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res.s = a.s; |
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int cmp; |
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if (a.m0 < b.m0) { |
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cmp = -1; |
| 233 |
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} else if (a.m0 > b.m0) { |
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cmp = +1; |
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} else { |
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if (a.m1 < b.m1) { |
| 237 |
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cmp = -1; |
| 238 |
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} else if (a.m1 > b.m1) { |
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cmp = +1; |
| 240 |
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} else { |
| 241 |
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cmp = 0; |
| 242 |
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} |
| 243 |
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} |
| 244 |
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if (!cmp) { |
| 245 |
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if (FPSCR_RN(gCPU.fpscr) == FPSCR_RN_MINF) { |
| 246 |
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res.s |= b.s; |
| 247 |
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} else { |
| 248 |
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res.s &= b.s; |
| 249 |
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} |
| 250 |
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res.type = ppc_fpr_zero; |
| 251 |
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} else { |
| 252 |
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if (cmp < 0) { |
| 253 |
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ppc_fpu_sub_quadro_m(res, b, a); |
| 254 |
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res.s = b.s; |
| 255 |
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} else { |
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ppc_fpu_sub_quadro_m(res, a, b); |
| 257 |
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} |
| 258 |
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diff = ppc_fpu_normalize_quadro(res) - (128-107); |
| 259 |
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int X_prime = res.m1 & 1; |
| 260 |
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res.m1 &= 0xfffffffffffffffeULL; |
| 261 |
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ppc_fpu_quadro_mshl(res, diff); |
| 262 |
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res.e -= diff; |
| 263 |
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res.m1 |= X_prime; |
| 264 |
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} |
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// res = [107] |
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} |
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break; |
| 268 |
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} |
| 269 |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_NaN): |
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res.s = a.s; |
| 271 |
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res.type = ppc_fpr_NaN; |
| 272 |
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break; |
| 273 |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_zero): |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_norm): |
| 275 |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_Inf): |
| 276 |
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case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_zero): |
| 277 |
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res.e = a.e; |
| 278 |
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res.s = a.s; |
| 279 |
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res.m0 = a.m0; |
| 280 |
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res.m1 = a.m1; |
| 281 |
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res.type = a.type; |
| 282 |
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break; |
| 283 |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_norm): |
| 284 |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_NaN): |
| 285 |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_NaN): |
| 286 |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_NaN): |
| 287 |
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res.e = b.e; |
| 288 |
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res.s = b.s; |
| 289 |
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res.m0 = b.m0; |
| 290 |
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res.m1 = b.m1; |
| 291 |
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res.type = b.type; |
| 292 |
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break; |
| 293 |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_Inf): |
| 294 |
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if (a.s != b.s) { |
| 295 |
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// +oo + -oo == NaN |
| 296 |
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res.s = a.s ^ b.s; |
| 297 |
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res.type = ppc_fpr_NaN; |
| 298 |
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break; |
| 299 |
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} |
| 300 |
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// fall-thru |
| 301 |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_norm): |
| 302 |
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case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_zero): |
| 303 |
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res.s = a.s; |
| 304 |
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res.type = a.type; |
| 305 |
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break; |
| 306 |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_Inf): |
| 307 |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_Inf): |
| 308 |
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res.s = b.s; |
| 309 |
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res.type = b.type; |
| 310 |
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break; |
| 311 |
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case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_zero): |
| 312 |
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// round bla |
| 313 |
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res.type = ppc_fpr_zero; |
| 314 |
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res.s = a.s && b.s; |
| 315 |
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break; |
| 316 |
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} |
| 317 |
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} |
| 318 |
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|
| 319 |
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inline void ppc_fpu_add_uint64_carry(uint64 &a, uint64 b, uint64 &carry) |
| 320 |
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{ |
| 321 |
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carry = (a+b < a) ? 1 : 0; |
| 322 |
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a += b; |
| 323 |
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} |
| 324 |
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| 325 |
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// 'res' has 56 significant bits on return, a + b have 56 significant bits each |
| 326 |
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inline void ppc_fpu_mul(ppc_double &res, const ppc_double &a, const ppc_double &b) |
| 327 |
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{ |
| 328 |
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res.s = a.s ^ b.s; |
| 329 |
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switch (PPC_FPR_TYPE2(a.type, b.type)) { |
| 330 |
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case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_norm): { |
| 331 |
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res.type = ppc_fpr_norm; |
| 332 |
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res.e = a.e + b.e; |
| 333 |
|
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// printf("new exp: %d\n", res.e); |
| 334 |
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// ht_printf("MUL:\na.m: %qb\nb.m: %qb\n", a.m, b.m); |
| 335 |
|
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uint64 fH, fM1, fM2, fL; |
| 336 |
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fL = (a.m & 0xffffffff) * (b.m & 0xffffffff); // [32] * [32] = [63,64] |
| 337 |
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fM1 = (a.m >> 32) * (b.m & 0xffffffff); // [24] * [32] = [55,56] |
| 338 |
|
|
fM2 = (a.m & 0xffffffff) * (b.m >> 32); // [32] * [24] = [55,56] |
| 339 |
|
|
fH = (a.m >> 32) * (b.m >> 32); // [24] * [24] = [47,48] |
| 340 |
|
|
// ht_printf("fH: %qx fM1: %qx fM2: %qx fL: %qx\n", fH, fM1, fM2, fL); |
| 341 |
|
|
|
| 342 |
|
|
// calulate fH * 2^64 + (fM1 + fM2) * 2^32 + fL |
| 343 |
|
|
uint64 rL, rH; |
| 344 |
|
|
rL = fL; // rL = rH = [63,64] |
| 345 |
|
|
rH = fH; // rH = fH = [47,48] |
| 346 |
|
|
uint64 split; |
| 347 |
|
|
split = fM1 + fM2; |
| 348 |
|
|
uint64 carry; |
| 349 |
|
|
ppc_fpu_add_uint64_carry(rL, (split & 0xffffffff) << 32, carry); // rL = [63,64] |
| 350 |
|
|
rH += carry; // rH = [0 .. 2^48] |
| 351 |
|
|
rH += split >> 32; // rH = [0:48], where 46, 47 or 48 set |
| 352 |
|
|
|
| 353 |
|
|
// res.m = [0 0 .. 0 | rH_48 rH_47 .. rH_0 | rL_63 rL_62 .. rL_55] |
| 354 |
|
|
// [---------------------------------------------------------] |
| 355 |
|
|
// bit = [63 62 .. 58 | 57 56 .. 9 | 8 7 0 ] |
| 356 |
|
|
// [---------------------------------------------------------] |
| 357 |
|
|
// [15 bits zero | 49 bits rH | 8 most sign.bits rL ] |
| 358 |
|
|
res.m = rH << 9; |
| 359 |
|
|
res.m |= rL >> (64-9); |
| 360 |
|
|
// res.m = [58] |
| 361 |
|
|
|
| 362 |
|
|
// ht_printf("fH: %qx fM1: %qx fM2: %qx fL: %qx\n", fH, fM1, fM2, fL); |
| 363 |
|
|
if (res.m & (1ULL << 57)) { |
| 364 |
|
|
res.m >>= 2; |
| 365 |
|
|
res.e += 2; |
| 366 |
|
|
} else if (res.m & (1ULL << 56)) { |
| 367 |
|
|
res.m >>= 1; |
| 368 |
|
|
res.e++; |
| 369 |
|
|
} |
| 370 |
|
|
// res.m = [56] |
| 371 |
|
|
break; |
| 372 |
|
|
} |
| 373 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_NaN): |
| 374 |
|
|
res.type = a.type; |
| 375 |
|
|
res.e = a.e; |
| 376 |
|
|
break; |
| 377 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_norm): |
| 378 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_Inf): |
| 379 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_zero): |
| 380 |
|
|
res.s = a.s; |
| 381 |
|
|
// fall-thru |
| 382 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_Inf): |
| 383 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_norm): |
| 384 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_norm): |
| 385 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_zero): |
| 386 |
|
|
res.type = a.type; |
| 387 |
|
|
break; |
| 388 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_NaN): |
| 389 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_NaN): |
| 390 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_NaN): |
| 391 |
|
|
res.s = b.s; |
| 392 |
|
|
// fall-thru |
| 393 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_Inf): |
| 394 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_zero): |
| 395 |
|
|
res.type = b.type; |
| 396 |
|
|
break; |
| 397 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_Inf): |
| 398 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_zero): |
| 399 |
|
|
res.type = ppc_fpr_NaN; |
| 400 |
|
|
break; |
| 401 |
|
|
} |
| 402 |
|
|
} |
| 403 |
|
|
|
| 404 |
|
|
// 'res' has 'prec' significant bits on return, a + b have 56 significant bits each |
| 405 |
|
|
// for 111 >= prec >= 64 |
| 406 |
|
|
inline void ppc_fpu_mul_quadro(ppc_quadro &res, ppc_double &a, ppc_double &b, int prec) |
| 407 |
|
|
{ |
| 408 |
|
|
res.s = a.s ^ b.s; |
| 409 |
|
|
switch (PPC_FPR_TYPE2(a.type, b.type)) { |
| 410 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_norm): { |
| 411 |
|
|
res.type = ppc_fpr_norm; |
| 412 |
|
|
res.e = a.e + b.e; |
| 413 |
|
|
// printf("new exp: %d\n", res.e); |
| 414 |
|
|
// ht_printf("MUL:\na.m: %016qx\nb.m: %016qx\n", a.m, b.m); |
| 415 |
|
|
uint64 fH, fM1, fM2, fL; |
| 416 |
|
|
fL = (a.m & 0xffffffff) * (b.m & 0xffffffff); // [32] * [32] = [63,64] |
| 417 |
|
|
fM1 = (a.m >> 32) * (b.m & 0xffffffff); // [24] * [32] = [55,56] |
| 418 |
|
|
fM2 = (a.m & 0xffffffff) * (b.m >> 32); // [32] * [24] = [55,56] |
| 419 |
|
|
fH = (a.m >> 32) * (b.m >> 32); // [24] * [24] = [47,48] |
| 420 |
|
|
// ht_printf("fH: %016qx fM1: %016qx fM2: %016qx fL: %016qx\n", fH, fM1, fM2, fL); |
| 421 |
|
|
|
| 422 |
|
|
// calulate fH * 2^64 + (fM1 + fM2) * 2^32 + fL |
| 423 |
|
|
uint64 rL, rH; |
| 424 |
|
|
rL = fL; // rL = rH = [63,64] |
| 425 |
|
|
rH = fH; // rH = fH = [47,48] |
| 426 |
|
|
uint64 split; |
| 427 |
|
|
split = fM1 + fM2; |
| 428 |
|
|
uint64 carry; |
| 429 |
|
|
ppc_fpu_add_uint64_carry(rL, (split & 0xffffffff) << 32, carry); // rL = [63,64] |
| 430 |
|
|
rH += carry; // rH = [0 .. 2^48] |
| 431 |
|
|
rH += split >> 32; // rH = [0:48], where 46, 47 or 48 set |
| 432 |
|
|
|
| 433 |
|
|
// res.m0 = [0 0 .. 0 | rH_48 rH_47 .. rH_0 | rL_63 rL_62 .. rL_0] |
| 434 |
|
|
// [-----------------------------------------------------------] |
| 435 |
|
|
// log.bit= [127 126 .. 113 | 112 64 | 63 62 0 ] |
| 436 |
|
|
// [-----------------------------------------------------------] |
| 437 |
|
|
// [ 15 bits zero | 49 bits rH | 64 bits rL ] |
| 438 |
|
|
res.m0 = rH; |
| 439 |
|
|
res.m1 = rL; |
| 440 |
|
|
// res.m0|res.m1 = [111,112,113] |
| 441 |
|
|
|
| 442 |
|
|
// ht_printf("res = %016qx%016qx\n", res.m0, res.m1); |
| 443 |
|
|
if (res.m0 & (1ULL << 48)) { |
| 444 |
|
|
ppc_fpu_quadro_mshr(res, 2+(111-prec)); |
| 445 |
|
|
res.e += 2; |
| 446 |
|
|
} else if (res.m0 & (1ULL << 47)) { |
| 447 |
|
|
ppc_fpu_quadro_mshr(res, 1+(111-prec)); |
| 448 |
|
|
res.e += 1; |
| 449 |
|
|
} else { |
| 450 |
|
|
ppc_fpu_quadro_mshr(res, 111-prec); |
| 451 |
|
|
} |
| 452 |
|
|
// res.m0|res.m1 = [prec] |
| 453 |
|
|
break; |
| 454 |
|
|
} |
| 455 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_NaN): |
| 456 |
|
|
res.type = a.type; |
| 457 |
|
|
res.e = a.e; |
| 458 |
|
|
break; |
| 459 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_norm): |
| 460 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_Inf): |
| 461 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_zero): |
| 462 |
|
|
res.s = a.s; |
| 463 |
|
|
// fall-thru |
| 464 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_Inf): |
| 465 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_norm): |
| 466 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_norm): |
| 467 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_zero): |
| 468 |
|
|
res.type = a.type; |
| 469 |
|
|
break; |
| 470 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_NaN): |
| 471 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_NaN): |
| 472 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_NaN): |
| 473 |
|
|
res.s = b.s; |
| 474 |
|
|
// fall-thru |
| 475 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_Inf): |
| 476 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_zero): |
| 477 |
|
|
res.type = b.type; |
| 478 |
|
|
break; |
| 479 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_Inf): |
| 480 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_zero): |
| 481 |
|
|
res.type = ppc_fpr_NaN; |
| 482 |
|
|
break; |
| 483 |
|
|
} |
| 484 |
|
|
} |
| 485 |
|
|
|
| 486 |
|
|
// calculate one of these: |
| 487 |
|
|
// + m1 * m2 + s |
| 488 |
|
|
// + m1 * m2 - s |
| 489 |
|
|
// - m1 * m2 + s |
| 490 |
|
|
// - m1 * m2 - s |
| 491 |
|
|
// using a 106 bit accumulator |
| 492 |
|
|
// |
| 493 |
|
|
// .752 |
| 494 |
|
|
// |
| 495 |
|
|
// FIXME: There is a bug in this code that shows up in Mac OS X Finder fwd/bwd |
| 496 |
|
|
// button: the top line is not rendered correctly. This works with the jitc_x86 |
| 497 |
|
|
// FPU however... |
| 498 |
|
|
inline void ppc_fpu_mul_add(ppc_double &res, ppc_double &m1, ppc_double &m2, |
| 499 |
|
|
ppc_double &s) |
| 500 |
|
|
{ |
| 501 |
|
|
ppc_quadro p; |
| 502 |
|
|
/* ht_printf("m1 = %d * %016qx * 2^%d, %s\n", m1.s, m1.m, m1.e, |
| 503 |
|
|
ppc_fpu_get_fpr_type(m1.type)); |
| 504 |
|
|
ht_printf("m2 = %d * %016qx * 2^%d, %s\n", m2.s, m2.m, m2.e, |
| 505 |
|
|
ppc_fpu_get_fpr_type(m2.type));*/ |
| 506 |
|
|
// create product with 106 significant bits |
| 507 |
|
|
ppc_fpu_mul_quadro(p, m1, m2, 106); |
| 508 |
|
|
/* ht_printf("p = %d * %016qx%016qx * 2^%d, %s\n", p.s, p.m0, p.m1, p.e, |
| 509 |
|
|
ppc_fpu_get_fpr_type(p.type));*/ |
| 510 |
|
|
// convert s into ppc_quadro |
| 511 |
|
|
/* ht_printf("s = %d * %016qx * 2^%d %s\n", s.s, s.m, s.e, |
| 512 |
|
|
ppc_fpu_get_fpr_type(s.type));*/ |
| 513 |
|
|
ppc_quadro q; |
| 514 |
|
|
q.e = s.e; |
| 515 |
|
|
q.s = s.s; |
| 516 |
|
|
q.type = s.type; |
| 517 |
|
|
q.m0 = 0; |
| 518 |
|
|
q.m1 = s.m; |
| 519 |
|
|
// .. with 106 significant bits |
| 520 |
|
|
ppc_fpu_quadro_mshl(q, 106-56); |
| 521 |
|
|
/* ht_printf("q = %d * %016qx%016qx * 2^%d %s\n", q.s, q.m0, q.m1, q.e, |
| 522 |
|
|
ppc_fpu_get_fpr_type(q.type));*/ |
| 523 |
|
|
// now we must add p, q. |
| 524 |
|
|
ppc_quadro x; |
| 525 |
|
|
ppc_fpu_add_quadro(x, p, q); |
| 526 |
|
|
// x = [107] |
| 527 |
|
|
/* ht_printf("x = %d * %016qx%016qx * 2^%d %s\n", x.s, x.m0, x.m1, x.e, |
| 528 |
|
|
ppc_fpu_get_fpr_type(x.type));*/ |
| 529 |
|
|
res.type = x.type; |
| 530 |
|
|
res.s = x.s; |
| 531 |
|
|
res.e = x.e; |
| 532 |
|
|
if (x.type == ppc_fpr_norm) { |
| 533 |
|
|
res.m = x.m0 << 13; // 43 bits from m0 |
| 534 |
|
|
res.m |= (x.m1 >> (64-12)) << 1; // 12 bits from m1 |
| 535 |
|
|
res.m |= x.m1 & 1; // X' bit from m1 |
| 536 |
|
|
} |
| 537 |
|
|
/* ht_printf("res = %d * %016qx * 2^%d %s\n", res.s, res.m, res.e, |
| 538 |
|
|
ppc_fpu_get_fpr_type(res.type));*/ |
| 539 |
|
|
} |
| 540 |
|
|
|
| 541 |
|
|
inline void ppc_fpu_div(ppc_double &res, const ppc_double &a, const ppc_double &b) |
| 542 |
|
|
{ |
| 543 |
|
|
res.s = a.s ^ b.s; |
| 544 |
|
|
switch (PPC_FPR_TYPE2(a.type, b.type)) { |
| 545 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_norm): { |
| 546 |
|
|
res.type = ppc_fpr_norm; |
| 547 |
|
|
res.e = a.e - b.e; |
| 548 |
|
|
res.m = 0; |
| 549 |
|
|
uint64 am = a.m, bm = b.m; |
| 550 |
|
|
uint i = 0; |
| 551 |
|
|
while (am && (i<56)) { |
| 552 |
|
|
res.m <<= 1; |
| 553 |
|
|
if (am >= bm) { |
| 554 |
|
|
res.m |= 1; |
| 555 |
|
|
am -= bm; |
| 556 |
|
|
} |
| 557 |
|
|
am <<= 1; |
| 558 |
|
|
// printf("am=%llx, bm=%llx, rm=%llx\n", am, bm, res.m); |
| 559 |
|
|
i++; |
| 560 |
|
|
} |
| 561 |
|
|
res.m <<= 57-i; |
| 562 |
|
|
if (res.m & (1ULL << 56)) { |
| 563 |
|
|
res.m >>= 1; |
| 564 |
|
|
} else { |
| 565 |
|
|
res.e--; |
| 566 |
|
|
} |
| 567 |
|
|
// printf("final: am=%llx, bm=%llx, rm=%llx\n", am, bm, res.m); |
| 568 |
|
|
break; |
| 569 |
|
|
} |
| 570 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_NaN): |
| 571 |
|
|
res.e = a.e; |
| 572 |
|
|
// fall-thru |
| 573 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_norm): |
| 574 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_Inf): |
| 575 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_NaN, ppc_fpr_zero): |
| 576 |
|
|
res.s = a.s; |
| 577 |
|
|
// fall-thru |
| 578 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_norm): |
| 579 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_norm): |
| 580 |
|
|
res.type = a.type; |
| 581 |
|
|
break; |
| 582 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_NaN): |
| 583 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_NaN): |
| 584 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_NaN): |
| 585 |
|
|
res.s = b.s; |
| 586 |
|
|
res.type = b.type; |
| 587 |
|
|
break; |
| 588 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_Inf): |
| 589 |
|
|
res.type = ppc_fpr_zero; |
| 590 |
|
|
break; |
| 591 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_norm, ppc_fpr_zero): |
| 592 |
|
|
res.type = ppc_fpr_Inf; |
| 593 |
|
|
break; |
| 594 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_Inf): |
| 595 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_Inf, ppc_fpr_zero): |
| 596 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_Inf): |
| 597 |
|
|
case PPC_FPR_TYPE2(ppc_fpr_zero, ppc_fpr_zero): |
| 598 |
|
|
res.type = ppc_fpr_NaN; |
| 599 |
|
|
break; |
| 600 |
|
|
} |
| 601 |
|
|
} |
| 602 |
|
|
|
| 603 |
|
|
inline void ppc_fpu_sqrt(ppc_double &D, const ppc_double &B) |
| 604 |
|
|
{ |
| 605 |
|
|
switch (B.type) { |
| 606 |
|
|
case ppc_fpr_norm: |
| 607 |
|
|
if (B.s) { |
| 608 |
|
|
D.type = ppc_fpr_NaN; |
| 609 |
|
|
gCPU.fpscr |= FPSCR_VXSQRT; |
| 610 |
|
|
break; |
| 611 |
|
|
} |
| 612 |
|
|
// D := 1/2(D_old + B/D_old) |
| 613 |
|
|
D = B; |
| 614 |
|
|
D.e /= 2; |
| 615 |
|
|
for (int i=0; i<6; i++) { |
| 616 |
|
|
ppc_double D_old = D; |
| 617 |
|
|
ppc_double B_div_D_old; |
| 618 |
|
|
ppc_fpu_div(B_div_D_old, B, D_old); |
| 619 |
|
|
ppc_fpu_add(D, D_old, B_div_D_old); |
| 620 |
|
|
D.e--; |
| 621 |
|
|
|
| 622 |
|
|
/* uint64 e; |
| 623 |
|
|
ppc_double E = D; |
| 624 |
|
|
ppc_fpu_pack_double(E, e); |
| 625 |
|
|
printf("%.20f\n", *(double *)&e);*/ |
| 626 |
|
|
} |
| 627 |
|
|
break; |
| 628 |
|
|
case ppc_fpr_zero: |
| 629 |
|
|
D.type = ppc_fpr_zero; |
| 630 |
|
|
D.s = B.s; |
| 631 |
|
|
break; |
| 632 |
|
|
case ppc_fpr_Inf: |
| 633 |
|
|
if (B.s) { |
| 634 |
|
|
D.type = ppc_fpr_NaN; |
| 635 |
|
|
gCPU.fpscr |= FPSCR_VXSQRT; |
| 636 |
|
|
} else { |
| 637 |
|
|
D.type = ppc_fpr_Inf; |
| 638 |
|
|
D.s = 0; |
| 639 |
|
|
} |
| 640 |
|
|
break; |
| 641 |
|
|
case ppc_fpr_NaN: |
| 642 |
|
|
D.type = ppc_fpr_NaN; |
| 643 |
|
|
break; |
| 644 |
|
|
} |
| 645 |
|
|
} |
| 646 |
|
|
|
| 647 |
|
|
void ppc_fpu_test() |
| 648 |
|
|
{ |
| 649 |
|
|
ppc_double A, B, C; |
| 650 |
|
|
double a, b, c; |
| 651 |
|
|
A.type = B.type = ppc_fpr_norm; |
| 652 |
|
|
A.s = 1; |
| 653 |
|
|
A.e = 0; |
| 654 |
|
|
A.m = 0; |
| 655 |
|
|
A.m = ((1ULL<<56)-1)-((1ULL<<10)-1); |
| 656 |
|
|
ht_printf("%qb\n", A.m); |
| 657 |
|
|
B.s = 1; |
| 658 |
|
|
B.e = 0; |
| 659 |
|
|
B.m = 0; |
| 660 |
|
|
B.m = ((1ULL<<56)-1)-((1ULL<<50)-1); |
| 661 |
|
|
a = ppc_fpu_get_double(A); |
| 662 |
|
|
b = ppc_fpu_get_double(B); |
| 663 |
|
|
printf("%f + %f = \n", a, b); |
| 664 |
|
|
ppc_fpu_add(C, A, B); |
| 665 |
|
|
uint64 d; |
| 666 |
|
|
uint32 s; |
| 667 |
|
|
ppc_fpu_pack_double_as_single(C, d); |
| 668 |
|
|
ht_printf("%064qb\n", d); |
| 669 |
|
|
ppc_fpu_unpack_double(C, d); |
| 670 |
|
|
ppc_fpu_pack_single(C, s); |
| 671 |
|
|
ht_printf("single: %032b\n", s); |
| 672 |
|
|
ppc_single Cs; |
| 673 |
|
|
ppc_fpu_unpack_single(Cs, s); |
| 674 |
|
|
ppc_fpu_single_to_double(Cs, C); |
| 675 |
|
|
// ht_printf("%d\n", ppc_fpu_double_to_int(C)); |
| 676 |
|
|
c = ppc_fpu_get_double(C); |
| 677 |
|
|
printf("%f\n", c); |
| 678 |
|
|
} |
| 679 |
|
|
|
| 680 |
|
|
/* |
| 681 |
|
|
* a and b must not be NaNs |
| 682 |
|
|
*/ |
| 683 |
|
|
inline uint32 ppc_fpu_compare(ppc_double &a, ppc_double &b) |
| 684 |
|
|
{ |
| 685 |
|
|
if (a.type == ppc_fpr_zero) { |
| 686 |
|
|
if (b.type == ppc_fpr_zero) return 2; |
| 687 |
|
|
return (b.s) ? 4: 8; |
| 688 |
|
|
} |
| 689 |
|
|
if (b.type == ppc_fpr_zero) return (a.s) ? 8: 4; |
| 690 |
|
|
if (a.s != b.s) return (a.s) ? 8: 4; |
| 691 |
|
|
if (a.e > b.e) return (a.s) ? 8: 4; |
| 692 |
|
|
if (a.e < b.e) return (a.s) ? 4: 8; |
| 693 |
|
|
if (a.m > b.m) return (a.s) ? 8: 4; |
| 694 |
|
|
if (a.m < b.m) return (a.s) ? 4: 8; |
| 695 |
|
|
return 2; |
| 696 |
|
|
} |
| 697 |
|
|
|
| 698 |
|
|
double ppc_fpu_get_double(uint64 d) |
| 699 |
|
|
{ |
| 700 |
|
|
ppc_double dd; |
| 701 |
|
|
ppc_fpu_unpack_double(dd, d); |
| 702 |
|
|
return ppc_fpu_get_double(dd); |
| 703 |
|
|
} |
| 704 |
|
|
|
| 705 |
|
|
double ppc_fpu_get_double(ppc_double &d) |
| 706 |
|
|
{ |
| 707 |
|
|
if (d.type == ppc_fpr_norm) { |
| 708 |
|
|
double r = d.m; |
| 709 |
|
|
for (int i=0; i<55; i++) { |
| 710 |
|
|
r = r / 2.0; |
| 711 |
|
|
} |
| 712 |
|
|
if (d.e < 0) { |
| 713 |
|
|
for (int i=0; i>d.e; i--) { |
| 714 |
|
|
r = r / 2.0; |
| 715 |
|
|
} |
| 716 |
|
|
} else if (d.e > 0) { |
| 717 |
|
|
for (int i=0; i<d.e; i++) { |
| 718 |
|
|
r = r * 2.0; |
| 719 |
|
|
} |
| 720 |
|
|
} |
| 721 |
|
|
if (d.s) r = -r; |
| 722 |
|
|
return r; |
| 723 |
|
|
} else { |
| 724 |
|
|
return 0.0; |
| 725 |
|
|
} |
| 726 |
|
|
} |
| 727 |
|
|
|
| 728 |
|
|
/*********************************************************************************** |
| 729 |
|
|
* |
| 730 |
|
|
*/ |
| 731 |
|
|
|
| 732 |
|
|
|
| 733 |
|
|
/* |
| 734 |
|
|
* fabsx Floating Absolute Value |
| 735 |
|
|
* .484 |
| 736 |
|
|
*/ |
| 737 |
|
|
void ppc_opc_fabsx() |
| 738 |
|
|
{ |
| 739 |
|
|
int frD, frA, frB; |
| 740 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, frD, frA, frB); |
| 741 |
|
|
PPC_OPC_ASSERT(frA==0); |
| 742 |
|
|
gCPU.fpr[frD] = gCPU.fpr[frB] & ~FPU_SIGN_BIT; |
| 743 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 744 |
|
|
// update cr1 flags |
| 745 |
|
|
PPC_FPU_ERR("fabs.\n"); |
| 746 |
|
|
} |
| 747 |
|
|
} |
| 748 |
|
|
/* |
| 749 |
|
|
* faddx Floating Add (Double-Precision) |
| 750 |
|
|
* .485 |
| 751 |
|
|
*/ |
| 752 |
|
|
void ppc_opc_faddx() |
| 753 |
|
|
{ |
| 754 |
|
|
int frD, frA, frB, frC; |
| 755 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 756 |
|
|
PPC_OPC_ASSERT(frC==0); |
| 757 |
|
|
ppc_double A, B, D; |
| 758 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 759 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 760 |
|
|
if (A.s != B.s && A.type == ppc_fpr_Inf && B.type == ppc_fpr_Inf) { |
| 761 |
|
|
gCPU.fpscr |= FPSCR_VXISI; |
| 762 |
|
|
} |
| 763 |
|
|
ppc_fpu_add(D, A, B); |
| 764 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 765 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 766 |
|
|
// update cr1 flags |
| 767 |
|
|
PPC_FPU_ERR("fadd.\n"); |
| 768 |
|
|
} |
| 769 |
|
|
} |
| 770 |
|
|
/* |
| 771 |
|
|
* faddx Floating Add Single |
| 772 |
|
|
* .486 |
| 773 |
|
|
*/ |
| 774 |
|
|
void ppc_opc_faddsx() |
| 775 |
|
|
{ |
| 776 |
|
|
int frD, frA, frB, frC; |
| 777 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 778 |
|
|
PPC_OPC_ASSERT(frC==0); |
| 779 |
|
|
ppc_double A, B, D; |
| 780 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 781 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 782 |
|
|
if (A.s != B.s && A.type == ppc_fpr_Inf && B.type == ppc_fpr_Inf) { |
| 783 |
|
|
gCPU.fpscr |= FPSCR_VXISI; |
| 784 |
|
|
} |
| 785 |
|
|
ppc_fpu_add(D, A, B); |
| 786 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 787 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 788 |
|
|
// update cr1 flags |
| 789 |
|
|
PPC_FPU_ERR("fadds.\n"); |
| 790 |
|
|
} |
| 791 |
|
|
} |
| 792 |
|
|
/* |
| 793 |
|
|
* fcmpo Floating Compare Ordered |
| 794 |
|
|
* .488 |
| 795 |
|
|
*/ |
| 796 |
|
|
static uint32 ppc_fpu_cmp_and_mask[8] = { |
| 797 |
|
|
0xfffffff0, |
| 798 |
|
|
0xffffff0f, |
| 799 |
|
|
0xfffff0ff, |
| 800 |
|
|
0xffff0fff, |
| 801 |
|
|
0xfff0ffff, |
| 802 |
|
|
0xff0fffff, |
| 803 |
|
|
0xf0ffffff, |
| 804 |
|
|
0x0fffffff, |
| 805 |
|
|
}; |
| 806 |
|
|
void ppc_opc_fcmpo() |
| 807 |
|
|
{ |
| 808 |
|
|
int crfD, frA, frB; |
| 809 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, crfD, frA, frB); |
| 810 |
|
|
crfD >>= 2; |
| 811 |
|
|
ppc_double A, B; |
| 812 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 813 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 814 |
|
|
uint32 cmp; |
| 815 |
|
|
if (A.type == ppc_fpr_NaN || B.type == ppc_fpr_NaN) { |
| 816 |
|
|
gCPU.fpscr |= FPSCR_VXSNAN; |
| 817 |
|
|
/*if (bla)*/ gCPU.fpscr |= FPSCR_VXVC; |
| 818 |
|
|
cmp = 1; |
| 819 |
|
|
} else { |
| 820 |
|
|
cmp = ppc_fpu_compare(A, B); |
| 821 |
|
|
} |
| 822 |
|
|
crfD = 7-crfD; |
| 823 |
|
|
gCPU.fpscr &= ~0x1f000; |
| 824 |
|
|
gCPU.fpscr |= (cmp << 12); |
| 825 |
|
|
gCPU.cr &= ppc_fpu_cmp_and_mask[crfD]; |
| 826 |
|
|
gCPU.cr |= (cmp << (crfD * 4)); |
| 827 |
|
|
} |
| 828 |
|
|
/* |
| 829 |
|
|
* fcmpu Floating Compare Unordered |
| 830 |
|
|
* .489 |
| 831 |
|
|
*/ |
| 832 |
|
|
void ppc_opc_fcmpu() |
| 833 |
|
|
{ |
| 834 |
|
|
int crfD, frA, frB; |
| 835 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, crfD, frA, frB); |
| 836 |
|
|
crfD >>= 2; |
| 837 |
|
|
ppc_double A, B; |
| 838 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 839 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 840 |
|
|
uint32 cmp; |
| 841 |
|
|
if (A.type == ppc_fpr_NaN || B.type == ppc_fpr_NaN) { |
| 842 |
|
|
gCPU.fpscr |= FPSCR_VXSNAN; |
| 843 |
|
|
cmp = 1; |
| 844 |
|
|
} else { |
| 845 |
|
|
cmp = ppc_fpu_compare(A, B); |
| 846 |
|
|
} |
| 847 |
|
|
crfD = 7-crfD; |
| 848 |
|
|
gCPU.fpscr &= ~0x1f000; |
| 849 |
|
|
gCPU.fpscr |= (cmp << 12); |
| 850 |
|
|
gCPU.cr &= ppc_fpu_cmp_and_mask[crfD]; |
| 851 |
|
|
gCPU.cr |= (cmp << (crfD * 4)); |
| 852 |
|
|
} |
| 853 |
|
|
/* |
| 854 |
|
|
* fctiwx Floating Convert to Integer Word |
| 855 |
|
|
* .492 |
| 856 |
|
|
*/ |
| 857 |
|
|
void ppc_opc_fctiwx() |
| 858 |
|
|
{ |
| 859 |
|
|
int frD, frA, frB; |
| 860 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, frD, frA, frB); |
| 861 |
|
|
PPC_OPC_ASSERT(frA==0); |
| 862 |
|
|
ppc_double B; |
| 863 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 864 |
|
|
gCPU.fpr[frD] = ppc_fpu_double_to_int(B); |
| 865 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 866 |
|
|
// update cr1 flags |
| 867 |
|
|
PPC_FPU_ERR("fctiw.\n"); |
| 868 |
|
|
} |
| 869 |
|
|
} |
| 870 |
|
|
/* |
| 871 |
|
|
* fctiwzx Floating Convert to Integer Word with Round toward Zero |
| 872 |
|
|
* .493 |
| 873 |
|
|
*/ |
| 874 |
|
|
void ppc_opc_fctiwzx() |
| 875 |
|
|
{ |
| 876 |
|
|
int frD, frA, frB; |
| 877 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, frD, frA, frB); |
| 878 |
|
|
PPC_OPC_ASSERT(frA==0); |
| 879 |
|
|
uint32 oldfpscr = gCPU.fpscr; |
| 880 |
|
|
gCPU.fpscr &= ~3; |
| 881 |
|
|
gCPU.fpscr |= 1; |
| 882 |
|
|
ppc_double B; |
| 883 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 884 |
|
|
gCPU.fpr[frD] = ppc_fpu_double_to_int(B); |
| 885 |
|
|
gCPU.fpscr = oldfpscr; |
| 886 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 887 |
|
|
// update cr1 flags |
| 888 |
|
|
PPC_FPU_ERR("fctiwz.\n"); |
| 889 |
|
|
} |
| 890 |
|
|
} |
| 891 |
|
|
/* |
| 892 |
|
|
* fdivx Floating Divide (Double-Precision) |
| 893 |
|
|
* .494 |
| 894 |
|
|
*/ |
| 895 |
|
|
void ppc_opc_fdivx() |
| 896 |
|
|
{ |
| 897 |
|
|
int frD, frA, frB, frC; |
| 898 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 899 |
|
|
PPC_OPC_ASSERT(frC==0); |
| 900 |
|
|
ppc_double A, B, D; |
| 901 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 902 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 903 |
|
|
if (A.type == ppc_fpr_zero && B.type == ppc_fpr_zero) { |
| 904 |
|
|
gCPU.fpscr |= FPSCR_VXZDZ; |
| 905 |
|
|
} |
| 906 |
|
|
if (A.type == ppc_fpr_Inf && B.type == ppc_fpr_Inf) { |
| 907 |
|
|
gCPU.fpscr |= FPSCR_VXIDI; |
| 908 |
|
|
} |
| 909 |
|
|
if (B.type == ppc_fpr_zero && A.type != ppc_fpr_zero) { |
| 910 |
|
|
// FIXME:: |
| 911 |
|
|
gCPU.fpscr |= FPSCR_VXIDI; |
| 912 |
|
|
} |
| 913 |
|
|
ppc_fpu_div(D, A, B); |
| 914 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 915 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 916 |
|
|
// update cr1 flags |
| 917 |
|
|
PPC_FPU_ERR("fdiv.\n"); |
| 918 |
|
|
} |
| 919 |
|
|
} |
| 920 |
|
|
/* |
| 921 |
|
|
* fdivsx Floating Divide Single |
| 922 |
|
|
* .495 |
| 923 |
|
|
*/ |
| 924 |
|
|
void ppc_opc_fdivsx() |
| 925 |
|
|
{ |
| 926 |
|
|
int frD, frA, frB, frC; |
| 927 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 928 |
|
|
PPC_OPC_ASSERT(frC==0); |
| 929 |
|
|
ppc_double A, B, D; |
| 930 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 931 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 932 |
|
|
if (A.type == ppc_fpr_zero && B.type == ppc_fpr_zero) { |
| 933 |
|
|
gCPU.fpscr |= FPSCR_VXZDZ; |
| 934 |
|
|
} |
| 935 |
|
|
if (A.type == ppc_fpr_Inf && B.type == ppc_fpr_Inf) { |
| 936 |
|
|
gCPU.fpscr |= FPSCR_VXIDI; |
| 937 |
|
|
} |
| 938 |
|
|
if (B.type == ppc_fpr_zero && A.type != ppc_fpr_zero) { |
| 939 |
|
|
// FIXME:: |
| 940 |
|
|
gCPU.fpscr |= FPSCR_VXIDI; |
| 941 |
|
|
} |
| 942 |
|
|
ppc_fpu_div(D, A, B); |
| 943 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 944 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 945 |
|
|
// update cr1 flags |
| 946 |
|
|
PPC_FPU_ERR("fdivs.\n"); |
| 947 |
|
|
} |
| 948 |
|
|
} |
| 949 |
|
|
/* |
| 950 |
|
|
* fmaddx Floating Multiply-Add (Double-Precision) |
| 951 |
|
|
* .496 |
| 952 |
|
|
*/ |
| 953 |
|
|
void ppc_opc_fmaddx() |
| 954 |
|
|
{ |
| 955 |
|
|
int frD, frA, frB, frC; |
| 956 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 957 |
|
|
ppc_double A, B, C, D; |
| 958 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 959 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 960 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 961 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 962 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 963 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 964 |
|
|
// update cr1 flags |
| 965 |
|
|
PPC_FPU_ERR("fmadd.\n"); |
| 966 |
|
|
} |
| 967 |
|
|
} |
| 968 |
|
|
/* |
| 969 |
|
|
* fmaddx Floating Multiply-Add Single |
| 970 |
|
|
* .497 |
| 971 |
|
|
*/ |
| 972 |
|
|
void ppc_opc_fmaddsx() |
| 973 |
|
|
{ |
| 974 |
|
|
int frD, frA, frB, frC; |
| 975 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 976 |
|
|
ppc_double A, B, C, D; |
| 977 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 978 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 979 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 980 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 981 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 982 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 983 |
|
|
// update cr1 flags |
| 984 |
|
|
PPC_FPU_ERR("fmadds.\n"); |
| 985 |
|
|
} |
| 986 |
|
|
} |
| 987 |
|
|
/* |
| 988 |
|
|
* fmrx Floating Move Register |
| 989 |
|
|
* .498 |
| 990 |
|
|
*/ |
| 991 |
|
|
void ppc_opc_fmrx() |
| 992 |
|
|
{ |
| 993 |
|
|
int frD, rA, frB; |
| 994 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, frD, rA, frB); |
| 995 |
|
|
PPC_OPC_ASSERT(rA==0); |
| 996 |
|
|
gCPU.fpr[frD] = gCPU.fpr[frB]; |
| 997 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 998 |
|
|
// update cr1 flags |
| 999 |
|
|
PPC_FPU_ERR("fmr.\n"); |
| 1000 |
|
|
} |
| 1001 |
|
|
} |
| 1002 |
|
|
/* |
| 1003 |
|
|
* fmsubx Floating Multiply-Subtract (Double-Precision) |
| 1004 |
|
|
* .499 |
| 1005 |
|
|
*/ |
| 1006 |
|
|
void ppc_opc_fmsubx() |
| 1007 |
|
|
{ |
| 1008 |
|
|
int frD, frA, frB, frC; |
| 1009 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1010 |
|
|
ppc_double A, B, C, D; |
| 1011 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1012 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1013 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1014 |
|
|
B.s ^= 1; |
| 1015 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 1016 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 1017 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1018 |
|
|
// update cr1 flags |
| 1019 |
|
|
PPC_FPU_ERR("fmsub.\n"); |
| 1020 |
|
|
} |
| 1021 |
|
|
} |
| 1022 |
|
|
/* |
| 1023 |
|
|
* fmsubsx Floating Multiply-Subtract Single |
| 1024 |
|
|
* .500 |
| 1025 |
|
|
*/ |
| 1026 |
|
|
void ppc_opc_fmsubsx() |
| 1027 |
|
|
{ |
| 1028 |
|
|
int frD, frA, frB, frC; |
| 1029 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1030 |
|
|
ppc_double A, B, C, D; |
| 1031 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1032 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1033 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1034 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 1035 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 1036 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1037 |
|
|
// update cr1 flags |
| 1038 |
|
|
PPC_FPU_ERR("fmsubs.\n"); |
| 1039 |
|
|
} |
| 1040 |
|
|
} |
| 1041 |
|
|
/* |
| 1042 |
|
|
* fmulx Floating Multipy (Double-Precision) |
| 1043 |
|
|
* .501 |
| 1044 |
|
|
*/ |
| 1045 |
|
|
void ppc_opc_fmulx() |
| 1046 |
|
|
{ |
| 1047 |
|
|
int frD, frA, frB, frC; |
| 1048 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1049 |
|
|
PPC_OPC_ASSERT(frB==0); |
| 1050 |
|
|
ppc_double A, C, D; |
| 1051 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1052 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1053 |
|
|
if ((A.type == ppc_fpr_Inf && C.type == ppc_fpr_zero) |
| 1054 |
|
|
|| (A.type == ppc_fpr_zero && C.type == ppc_fpr_Inf)) { |
| 1055 |
|
|
gCPU.fpscr |= FPSCR_VXIMZ; |
| 1056 |
|
|
} |
| 1057 |
|
|
ppc_fpu_mul(D, A, C); |
| 1058 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 1059 |
|
|
// *((double*)&gCPU.fpr[frD]) = *((double*)(&gCPU.fpr[frA]))*(*((double*)(&gCPU.fpr[frC]))); |
| 1060 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1061 |
|
|
// update cr1 flags |
| 1062 |
|
|
PPC_FPU_ERR("fmul.\n"); |
| 1063 |
|
|
} |
| 1064 |
|
|
} |
| 1065 |
|
|
/* |
| 1066 |
|
|
* fmulsx Floating Multipy Single |
| 1067 |
|
|
* .502 |
| 1068 |
|
|
*/ |
| 1069 |
|
|
void ppc_opc_fmulsx() |
| 1070 |
|
|
{ |
| 1071 |
|
|
int frD, frA, frB, frC; |
| 1072 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1073 |
|
|
PPC_OPC_ASSERT(frB==0); |
| 1074 |
|
|
ppc_double A, C, D; |
| 1075 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1076 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1077 |
|
|
if ((A.type == ppc_fpr_Inf && C.type == ppc_fpr_zero) |
| 1078 |
|
|
|| (A.type == ppc_fpr_zero && C.type == ppc_fpr_Inf)) { |
| 1079 |
|
|
gCPU.fpscr |= FPSCR_VXIMZ; |
| 1080 |
|
|
} |
| 1081 |
|
|
ppc_fpu_mul(D, A, C); |
| 1082 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 1083 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1084 |
|
|
// update cr1 flags |
| 1085 |
|
|
PPC_FPU_ERR("fmuls.\n"); |
| 1086 |
|
|
} |
| 1087 |
|
|
} |
| 1088 |
|
|
/* |
| 1089 |
|
|
* fnabsx Floating Negative Absolute Value |
| 1090 |
|
|
* .503 |
| 1091 |
|
|
*/ |
| 1092 |
|
|
void ppc_opc_fnabsx() |
| 1093 |
|
|
{ |
| 1094 |
|
|
int frD, frA, frB; |
| 1095 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, frD, frA, frB); |
| 1096 |
|
|
PPC_OPC_ASSERT(frA==0); |
| 1097 |
|
|
gCPU.fpr[frD] = gCPU.fpr[frB] | FPU_SIGN_BIT; |
| 1098 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1099 |
|
|
// update cr1 flags |
| 1100 |
|
|
PPC_FPU_ERR("fnabs.\n"); |
| 1101 |
|
|
} |
| 1102 |
|
|
} |
| 1103 |
|
|
/* |
| 1104 |
|
|
* fnegx Floating Negate |
| 1105 |
|
|
* .504 |
| 1106 |
|
|
*/ |
| 1107 |
|
|
void ppc_opc_fnegx() |
| 1108 |
|
|
{ |
| 1109 |
|
|
int frD, frA, frB; |
| 1110 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, frD, frA, frB); |
| 1111 |
|
|
PPC_OPC_ASSERT(frA==0); |
| 1112 |
|
|
gCPU.fpr[frD] = gCPU.fpr[frB] ^ FPU_SIGN_BIT; |
| 1113 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1114 |
|
|
// update cr1 flags |
| 1115 |
|
|
PPC_FPU_ERR("fneg.\n"); |
| 1116 |
|
|
} |
| 1117 |
|
|
} |
| 1118 |
|
|
/* |
| 1119 |
|
|
* fnmaddx Floating Negative Multiply-Add (Double-Precision) |
| 1120 |
|
|
* .505 |
| 1121 |
|
|
*/ |
| 1122 |
|
|
void ppc_opc_fnmaddx() |
| 1123 |
|
|
{ |
| 1124 |
|
|
int frD, frA, frB, frC; |
| 1125 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1126 |
|
|
ppc_double A, B, C, D/*, E*/; |
| 1127 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1128 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1129 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1130 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 1131 |
|
|
D.s ^= 1; |
| 1132 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 1133 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1134 |
|
|
// update cr1 flags |
| 1135 |
|
|
PPC_FPU_ERR("fnmadd.\n"); |
| 1136 |
|
|
} |
| 1137 |
|
|
} |
| 1138 |
|
|
/* |
| 1139 |
|
|
* fnmaddsx Floating Negative Multiply-Add Single |
| 1140 |
|
|
* .506 |
| 1141 |
|
|
*/ |
| 1142 |
|
|
void ppc_opc_fnmaddsx() |
| 1143 |
|
|
{ |
| 1144 |
|
|
int frD, frA, frB, frC; |
| 1145 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1146 |
|
|
ppc_double A, B, C, D; |
| 1147 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1148 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1149 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1150 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 1151 |
|
|
D.s ^= 1; |
| 1152 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 1153 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1154 |
|
|
// update cr1 flags |
| 1155 |
|
|
PPC_FPU_ERR("fnmadds.\n"); |
| 1156 |
|
|
} |
| 1157 |
|
|
} |
| 1158 |
|
|
/* |
| 1159 |
|
|
* fnmsubx Floating Negative Multiply-Subtract (Double-Precision) |
| 1160 |
|
|
* .507 |
| 1161 |
|
|
*/ |
| 1162 |
|
|
void ppc_opc_fnmsubx() |
| 1163 |
|
|
{ |
| 1164 |
|
|
int frD, frA, frB, frC; |
| 1165 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1166 |
|
|
ppc_double A, B, C, D; |
| 1167 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1168 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1169 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1170 |
|
|
B.s ^= 1; |
| 1171 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 1172 |
|
|
D.s ^= 1; |
| 1173 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 1174 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1175 |
|
|
// update cr1 flags |
| 1176 |
|
|
PPC_FPU_ERR("fnmsub.\n"); |
| 1177 |
|
|
} |
| 1178 |
|
|
} |
| 1179 |
|
|
/* |
| 1180 |
|
|
* fnsubsx Floating Negative Multiply-Subtract Single |
| 1181 |
|
|
* .508 |
| 1182 |
|
|
*/ |
| 1183 |
|
|
void ppc_opc_fnmsubsx() |
| 1184 |
|
|
{ |
| 1185 |
|
|
int frD, frA, frB, frC; |
| 1186 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1187 |
|
|
ppc_double A, B, C, D; |
| 1188 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1189 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1190 |
|
|
ppc_fpu_unpack_double(C, gCPU.fpr[frC]); |
| 1191 |
|
|
B.s ^= 1; |
| 1192 |
|
|
ppc_fpu_mul_add(D, A, C, B); |
| 1193 |
|
|
D.s ^= 1; |
| 1194 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 1195 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1196 |
|
|
// update cr1 flags |
| 1197 |
|
|
PPC_FPU_ERR("fnmsubs.\n"); |
| 1198 |
|
|
} |
| 1199 |
|
|
} |
| 1200 |
|
|
/* |
| 1201 |
|
|
* fresx Floating Reciprocal Estimate Single |
| 1202 |
|
|
* .509 |
| 1203 |
|
|
*/ |
| 1204 |
|
|
void ppc_opc_fresx() |
| 1205 |
|
|
{ |
| 1206 |
|
|
int frD, frA, frB, frC; |
| 1207 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1208 |
|
|
PPC_OPC_ASSERT(frA==0 && frC==0); |
| 1209 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1210 |
|
|
// update cr1 flags |
| 1211 |
|
|
PPC_FPU_ERR("fres.\n"); |
| 1212 |
|
|
} |
| 1213 |
|
|
PPC_FPU_ERR("fres\n"); |
| 1214 |
|
|
} |
| 1215 |
|
|
/* |
| 1216 |
|
|
* frspx Floating Round to Single |
| 1217 |
|
|
* .511 |
| 1218 |
|
|
*/ |
| 1219 |
|
|
void ppc_opc_frspx() |
| 1220 |
|
|
{ |
| 1221 |
|
|
int frD, frA, frB; |
| 1222 |
|
|
PPC_OPC_TEMPL_X(gCPU.current_opc, frD, frA, frB); |
| 1223 |
|
|
PPC_OPC_ASSERT(frA==0); |
| 1224 |
|
|
ppc_double B; |
| 1225 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1226 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(B, gCPU.fpr[frD]); |
| 1227 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1228 |
|
|
// update cr1 flags |
| 1229 |
|
|
PPC_FPU_ERR("frsp.\n"); |
| 1230 |
|
|
} |
| 1231 |
|
|
} |
| 1232 |
|
|
/* |
| 1233 |
|
|
* frsqrtex Floating Reciprocal Square Root Estimate |
| 1234 |
|
|
* .512 |
| 1235 |
|
|
*/ |
| 1236 |
|
|
void ppc_opc_frsqrtex() |
| 1237 |
|
|
{ |
| 1238 |
|
|
int frD, frA, frB, frC; |
| 1239 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1240 |
|
|
PPC_OPC_ASSERT(frA==0 && frC==0); |
| 1241 |
|
|
ppc_double B; |
| 1242 |
|
|
ppc_double D; |
| 1243 |
|
|
ppc_double E; |
| 1244 |
|
|
ppc_double Q; |
| 1245 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1246 |
|
|
ppc_fpu_sqrt(Q, B); |
| 1247 |
|
|
E.type = ppc_fpr_norm; E.s = 0; E.e = 0; E.m = 0x80000000000000ULL; |
| 1248 |
|
|
ppc_fpu_div(D, E, Q); |
| 1249 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 1250 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1251 |
|
|
// update cr1 flags |
| 1252 |
|
|
PPC_FPU_ERR("frsqrte.\n"); |
| 1253 |
|
|
} |
| 1254 |
|
|
} |
| 1255 |
|
|
/* |
| 1256 |
|
|
* fselx Floating Select |
| 1257 |
|
|
* .514 |
| 1258 |
|
|
*/ |
| 1259 |
|
|
void ppc_opc_fselx() |
| 1260 |
|
|
{ |
| 1261 |
|
|
int frD, frA, frB, frC; |
| 1262 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1263 |
|
|
ppc_double A; |
| 1264 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1265 |
|
|
if (A.type == ppc_fpr_NaN || (A.type != ppc_fpr_zero && A.s)) { |
| 1266 |
|
|
gCPU.fpr[frD] = gCPU.fpr[frB]; |
| 1267 |
|
|
} else { |
| 1268 |
|
|
gCPU.fpr[frD] = gCPU.fpr[frC]; |
| 1269 |
|
|
} |
| 1270 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1271 |
|
|
// update cr1 flags |
| 1272 |
|
|
PPC_FPU_ERR("fsel.\n"); |
| 1273 |
|
|
} |
| 1274 |
|
|
} |
| 1275 |
|
|
/* |
| 1276 |
|
|
* fsqrtx Floating Square Root (Double-Precision) |
| 1277 |
|
|
* .515 |
| 1278 |
|
|
*/ |
| 1279 |
|
|
void ppc_opc_fsqrtx() |
| 1280 |
|
|
{ |
| 1281 |
|
|
int frD, frA, frB, frC; |
| 1282 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1283 |
|
|
PPC_OPC_ASSERT(frA==0 && frC==0); |
| 1284 |
|
|
ppc_double B; |
| 1285 |
|
|
ppc_double D; |
| 1286 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1287 |
|
|
ppc_fpu_sqrt(D, B); |
| 1288 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 1289 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1290 |
|
|
// update cr1 flags |
| 1291 |
|
|
PPC_FPU_ERR("fsqrt.\n"); |
| 1292 |
|
|
} |
| 1293 |
|
|
} |
| 1294 |
|
|
/* |
| 1295 |
|
|
* fsqrtsx Floating Square Root Single |
| 1296 |
|
|
* .515 |
| 1297 |
|
|
*/ |
| 1298 |
|
|
void ppc_opc_fsqrtsx() |
| 1299 |
|
|
{ |
| 1300 |
|
|
int frD, frA, frB, frC; |
| 1301 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1302 |
|
|
PPC_OPC_ASSERT(frA==0 && frC==0); |
| 1303 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1304 |
|
|
// update cr1 flags |
| 1305 |
|
|
PPC_FPU_ERR("fsqrts.\n"); |
| 1306 |
|
|
} |
| 1307 |
|
|
PPC_FPU_ERR("fsqrts\n"); |
| 1308 |
|
|
} |
| 1309 |
|
|
/* |
| 1310 |
|
|
* fsubx Floating Subtract (Double-Precision) |
| 1311 |
|
|
* .517 |
| 1312 |
|
|
*/ |
| 1313 |
|
|
void ppc_opc_fsubx() |
| 1314 |
|
|
{ |
| 1315 |
|
|
int frD, frA, frB, frC; |
| 1316 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1317 |
|
|
PPC_OPC_ASSERT(frC==0); |
| 1318 |
|
|
ppc_double A, B, D; |
| 1319 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1320 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1321 |
|
|
if (B.type != ppc_fpr_NaN) { |
| 1322 |
|
|
B.s ^= 1; |
| 1323 |
|
|
} |
| 1324 |
|
|
if (A.s != B.s && A.type == ppc_fpr_Inf && B.type == ppc_fpr_Inf) { |
| 1325 |
|
|
gCPU.fpscr |= FPSCR_VXISI; |
| 1326 |
|
|
} |
| 1327 |
|
|
ppc_fpu_add(D, A, B); |
| 1328 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double(D, gCPU.fpr[frD]); |
| 1329 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1330 |
|
|
// update cr1 flags |
| 1331 |
|
|
PPC_FPU_ERR("fsub.\n"); |
| 1332 |
|
|
} |
| 1333 |
|
|
} |
| 1334 |
|
|
/* |
| 1335 |
|
|
* fsubsx Floating Subtract Single |
| 1336 |
|
|
* .518 |
| 1337 |
|
|
*/ |
| 1338 |
|
|
void ppc_opc_fsubsx() |
| 1339 |
|
|
{ |
| 1340 |
|
|
int frD, frA, frB, frC; |
| 1341 |
|
|
PPC_OPC_TEMPL_A(gCPU.current_opc, frD, frA, frB, frC); |
| 1342 |
|
|
PPC_OPC_ASSERT(frC==0); |
| 1343 |
|
|
ppc_double A, B, D; |
| 1344 |
|
|
ppc_fpu_unpack_double(A, gCPU.fpr[frA]); |
| 1345 |
|
|
ppc_fpu_unpack_double(B, gCPU.fpr[frB]); |
| 1346 |
|
|
if (B.type != ppc_fpr_NaN) { |
| 1347 |
|
|
B.s ^= 1; |
| 1348 |
|
|
} |
| 1349 |
|
|
if (A.s != B.s && A.type == ppc_fpr_Inf && B.type == ppc_fpr_Inf) { |
| 1350 |
|
|
gCPU.fpscr |= FPSCR_VXISI; |
| 1351 |
|
|
} |
| 1352 |
|
|
ppc_fpu_add(D, A, B); |
| 1353 |
|
|
gCPU.fpscr |= ppc_fpu_pack_double_as_single(D, gCPU.fpr[frD]); |
| 1354 |
|
|
if (gCPU.current_opc & PPC_OPC_Rc) { |
| 1355 |
|
|
// update cr1 flags |
| 1356 |
|
|
PPC_FPU_ERR("fsubs.\n"); |
| 1357 |
|
|
} |
| 1358 |
|
|
} |
| 1359 |
|
|
|
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