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/* $OpenBSD: fpu_fmovecr.c,v 1.7 2006/01/30 21:23:23 miod Exp $ */
/* $NetBSD: fpu_fmovecr.c,v 1.10 2003/07/15 02:43:09 lukem 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.
* 3. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* @(#)fpu_fmovecr.c 10/8/95
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <machine/frame.h>
#include "fpu_emulate.h"
/* XXX: quick consistency check */
#if (FP_1 != 0x40000)
Error you have to change this table when changing the mantissa size
#endif
static struct fpn constrom[] = {
/* fp_class, fp_sign, fp_exp, fp_sticky, fp_mant[0] ... [2] */
{ FPC_NUM, 0, 1, 0, { 0x6487e, 0xd5110b46, 0x11a80000 } },
{ FPC_NUM, 0, -2, 0, { 0x4d104, 0xd427de7f, 0xbcc00000 } },
{ FPC_NUM, 0, 1, 0, { 0x56fc2, 0xa2c515da, 0x54d00000 } },
{ FPC_NUM, 0, 0, 0, { 0x5c551, 0xd94ae0bf, 0x85e00000 } },
{ FPC_NUM, 0, -2, 0, { 0x6f2de, 0xc549b943, 0x8ca80000 } },
{ FPC_ZERO, 0, 0, 0, { 0x0, 0x0, 0x0 } },
{ FPC_NUM, 0, -1, 0, { 0x58b90, 0xbfbe8e7b, 0xcd600000 } },
{ FPC_NUM, 0, 1, 0, { 0x49aec, 0x6eed5545, 0x60b80000 } },
{ FPC_NUM, 0, 0, 0, { 0x40000, 0x0, 0x0 } },
{ FPC_NUM, 0, 3, 0, { 0x50000, 0x0, 0x0 } },
{ FPC_NUM, 0, 6, 0, { 0x64000, 0x0, 0x0 } },
{ FPC_NUM, 0, 13, 0, { 0x4e200, 0x0, 0x0 } },
{ FPC_NUM, 0, 26, 0, { 0x5f5e1, 0x0, 0x0 } },
{ FPC_NUM, 0, 53, 0, { 0x470de, 0x4df82000, 0x0 } },
{ FPC_NUM, 0, 106, 0, { 0x4ee2d, 0x6d415b85, 0xacf00000 } },
{ FPC_NUM, 0, 212, 0, { 0x613c0, 0xfa4ffe7d, 0x36a80000 } },
{ FPC_NUM, 0, 425, 0, { 0x49dd2, 0x3e4c074c, 0x67000000 } },
{ FPC_NUM, 0, 850, 0, { 0x553f7, 0x5fdcefce, 0xf4700000 } },
{ FPC_NUM, 0, 1700, 0, { 0x718cd, 0x5753074, 0x8e380000 } },
{ FPC_NUM, 0, 3401, 0, { 0x64bb3, 0xac340ba8, 0x60b80000 } },
{ FPC_NUM, 0, 6803, 0, { 0x4f459, 0xdaee29ea, 0xef280000 } },
{ FPC_NUM, 0, 13606, 0, { 0x62302, 0x90145104, 0xbcd80000 } },
};
struct fpn *
fpu_const(fp, offset)
struct fpn *fp;
u_int offset;
{
struct fpn *r;
#ifdef DEBUG
if (fp == NULL) {
panic("fpu_const: NULL pointer passed");
}
#endif
if (offset == 0) {
r = &constrom[0];
} else if (0xb <= offset && offset <= 0xe) {
r = &constrom[offset - 0xb + 1];
} else if (0x30 <= offset && offset <= 0x3f) {
r = &constrom[offset - 0x30 + 6];
} else {
/* return 0.0 for anything else (incl. valid offset 0xf) */
r = &constrom[5];
}
CPYFPN(fp, r);
return fp;
}
int
fpu_emul_fmovecr(struct fpemu *fe, struct instruction *insn, int *typ)
{
int dstreg, offset;
u_int *fpreg;
dstreg = (insn->is_word1 >> 7) & 0x7;
offset = insn->is_word1 & 0x7F;
fpreg = &(fe->fe_fpframe->fpf_regs[0]);
(void)fpu_const(&fe->fe_f3, offset);
(void)fpu_upd_fpsr(fe, &fe->fe_f3);
fpu_implode(fe, &fe->fe_f3, FTYPE_EXT, &fpreg[dstreg * 3]);
#if DEBUG_FPE
printf(" fpu_emul_fmovecr: result %08x,%08x,%08x to FP%d\n",
fpreg[dstreg * 3], fpreg[dstreg * 3 + 1], fpreg[dstreg * 3 + 2],
dstreg);
#endif
return 0;
}
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