133 lines
4.0 KiB
C
133 lines
4.0 KiB
C
/* $NetBSD: fpu_fstore.c,v 1.7 1999/05/30 20:17:48 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 <sys/types.h>
|
|
#include <sys/signal.h>
|
|
#include <sys/systm.h>
|
|
#include <machine/frame.h>
|
|
|
|
#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];
|
|
|
|
#if DEBUG_FPE
|
|
printf(" fpu_emul_fstore: frame at %p fpframe at %p\n",
|
|
frame, fe->fe_fpframe);
|
|
#endif
|
|
|
|
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 DEBUG_FPE
|
|
printf(" fpu_emul_fstore: invalid format %d\n", format);
|
|
#endif
|
|
sig = SIGFPE;
|
|
}
|
|
#if DEBUG_FPE
|
|
printf(" fpu_emul_fstore: format %d, size %d\n",
|
|
format, insn->is_datasize);
|
|
#endif
|
|
|
|
fe->fe_fpsr &= ~FPSR_EXCP;
|
|
|
|
/* Get effective address. (modreg=opcode&077) */
|
|
sig = fpu_decode_ea(frame, insn, &insn->is_ea, insn->is_opcode);
|
|
if (sig) {
|
|
#if DEBUG_FPE
|
|
printf(" fpu_emul_fstore: failed in decode_ea sig=%d\n", sig);
|
|
#endif
|
|
return sig;
|
|
}
|
|
|
|
if (insn->is_datasize > 4 && insn->is_ea.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 DEBUG_FPE
|
|
printf(" fpu_emul_fstore: saving FP%d (%08x,%08x,%08x)\n",
|
|
regnum, fpregs[regnum * 3], fpregs[regnum * 3 + 1],
|
|
fpregs[regnum * 3 + 2]);
|
|
#endif
|
|
fpu_explode(fe, &fe->fe_f3, FTYPE_EXT, &fpregs[regnum * 3]);
|
|
#if DEBUG_FPE
|
|
{
|
|
static char *class_name[] = { "SNAN", "QNAN", "ZERO", "NUM", "INF" };
|
|
printf(" fpu_emul_fstore: fpn (%s,%c,%d,%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]);
|
|
}
|
|
#endif
|
|
fpu_implode(fe, &fe->fe_f3, format, buf);
|
|
|
|
fpu_store_ea(frame, insn, &insn->is_ea, (char *)buf);
|
|
#if DEBUG_FPE
|
|
printf(" fpu_emul_fstore: %08x,%08x,%08x size %d\n",
|
|
buf[0], buf[1], buf[2], insn->is_datasize);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|