From d8dcc918599d9711f1e1bdd1d4ade6998fbc7cb2 Mon Sep 17 00:00:00 2001 From: Theo de Raadt Date: Thu, 14 Dec 1995 04:53:17 +0000 Subject: from netbsd: Still incomplete, but much more complete FPE from Ken Nakata . This emulator does not yet emulate the following functions: FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN, FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS It is sufficient, however, to allow programs like df, w, and newfs, to run to completion with correct results. Portions of this code were based on the sparc fpe and on initial work by gwr. --- sys/arch/m68k/fpe/fpu_fstore.c | 127 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 sys/arch/m68k/fpe/fpu_fstore.c (limited to 'sys/arch/m68k/fpe/fpu_fstore.c') diff --git a/sys/arch/m68k/fpe/fpu_fstore.c b/sys/arch/m68k/fpe/fpu_fstore.c new file mode 100644 index 00000000000..34de45f10fc --- /dev/null +++ b/sys/arch/m68k/fpe/fpu_fstore.c @@ -0,0 +1,127 @@ +/* $NetBSD: fpu_fstore.c,v 1.2 1995/11/05 00:35:29 briggs Exp $ */ + +/* + * Copyright (c) 1995 Ken Nakata + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include +#include +#include + +#include "fpu_emulate.h" + +/* + * type 0: fmove mem/fpr->fpr + * In this function, we know + * (opcode & 0x01c0) == 0 + * (word1 & 0xe000) == 0x6000 + */ +int +fpu_emul_fstore(fe, insn) + struct fpemu *fe; + struct instruction *insn; +{ + struct frame *frame = fe->fe_frame; + u_int *fpregs = fe->fe_fpframe->fpf_regs; + int word1, sig; + int regnum; + int format; + u_int buf[3]; + u_int flags; + char regname; + + if (fpu_debug_level & DL_FSTORE) { + printf(" fpu_emul_fstore: frame at %08x fpframe at %08x\n", + frame, fe->fe_fpframe); + } + + word1 = insn->is_word1; + format = (word1 >> 10) & 7; + regnum = (word1 >> 7) & 7; + + insn->is_advance = 4; + + if (format == FTYPE_DBL) { + insn->is_datasize = 8; + } else if (format == FTYPE_SNG || format == FTYPE_LNG) { + insn->is_datasize = 4; + } else if (format == FTYPE_WRD) { + insn->is_datasize = 2; + format = FTYPE_LNG; + } else if (format == FTYPE_BYT) { + insn->is_datasize = 1; + format = FTYPE_LNG; + } else if (format == FTYPE_EXT) { + insn->is_datasize = 12; + } else { + /* invalid or unsupported operand format */ + if (fpu_debug_level & DL_FSTORE) { + printf(" fpu_emul_fstore: invalid format %d\n", format); + } + sig = SIGFPE; + } + if (fpu_debug_level & DL_FSTORE) { + printf(" fpu_emul_fstore: format %d, size %d\n", + format, insn->is_datasize); + } + + /* Get effective address. (modreg=opcode&077) */ + sig = fpu_decode_ea(frame, insn, &insn->is_ea0, insn->is_opcode); + if (sig) { + if (fpu_debug_level & DL_FSTORE) { + printf(" fpu_emul_fstore: failed in decode_ea sig=%d\n", sig); + } + return sig; + } + + if (insn->is_datasize > 4 && insn->is_ea0.ea_flags == EA_DIRECT) { + /* trying to store dbl or ext into a data register */ +#ifdef DEBUG + printf(" fpu_fstore: attempted to store dbl/ext to reg\n"); +#endif + return SIGILL; + } + + if (fpu_debug_level & DL_OPERANDS) + printf(" fpu_emul_fstore: saving FP%d (%08x,%08x,%08x)\n", + regnum, fpregs[regnum * 3], fpregs[regnum * 3 + 1], + fpregs[regnum * 3 + 2]); + fpu_explode(fe, &fe->fe_f3, FTYPE_EXT, &fpregs[regnum * 3]); + if (fpu_debug_level & DL_VALUES) { + static char *class_name[] = { "SNAN", "QNAN", "ZERO", "NUM", "INF" }; + printf(" fpu_emul_fstore: fpn (%s,%c,%d,%08x,%08x,%08x,%08x)\n", + class_name[fe->fe_f3.fp_class + 2], + fe->fe_f3.fp_sign ? '-' : '+', fe->fe_f3.fp_exp, + fe->fe_f3.fp_mant[0], fe->fe_f3.fp_mant[1], + fe->fe_f3.fp_mant[2], fe->fe_f3.fp_mant[3]); + } + fpu_implode(fe, &fe->fe_f3, format, buf); + + fpu_store_ea(frame, insn, &insn->is_ea0, (char *)buf); + if (fpu_debug_level & DL_RESULT) + printf(" fpu_emul_fstore: %08x,%08x,%08x size %d\n", + buf[0], buf[1], buf[2], insn->is_datasize); + + return 0; +} -- cgit v1.2.3