diff options
author | marcel <marcel@FreeBSD.org> | 2008-02-23 20:05:26 +0000 |
---|---|---|
committer | marcel <marcel@FreeBSD.org> | 2008-02-23 20:05:26 +0000 |
commit | 7e57bff3e27e862c8e8d079d0b1a515855b3ad34 (patch) | |
tree | 595e5661bff8b902e5e265264b1122f56098725b /sys/powerpc/fpu/fpu_extern.h | |
parent | c64ffce06ca80727502a4f1eda1792d2ab29d98e (diff) | |
download | FreeBSD-src-7e57bff3e27e862c8e8d079d0b1a515855b3ad34.zip FreeBSD-src-7e57bff3e27e862c8e8d079d0b1a515855b3ad34.tar.gz |
Add a floating-point emulator so that a single userland or single ABI
can run on processors that don't have a FPU. This is typically the
case for Book E processors. While a tuned system will probably want
to use soft-float (or use a processor that has a FPU if the usage is
FP intensive enough), allowing hard-float on FPU-less systems gives
great portability and flexibility.
Obtained from: NetBSD
Diffstat (limited to 'sys/powerpc/fpu/fpu_extern.h')
-rw-r--r-- | sys/powerpc/fpu/fpu_extern.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/sys/powerpc/fpu/fpu_extern.h b/sys/powerpc/fpu/fpu_extern.h new file mode 100644 index 0000000..cb569e2 --- /dev/null +++ b/sys/powerpc/fpu/fpu_extern.h @@ -0,0 +1,83 @@ +/* $NetBSD: fpu_extern.h,v 1.3 2005/12/11 12:18:42 christos Exp $ */ +/* $FreeBSD$ */ + +/*- + * Copyright (c) 1995 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Christos Zoulas. + * + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +struct proc; +struct fpreg; +struct trapframe; +union instr; +struct fpemu; +struct fpn; + +/* fpu.c */ +int fpu_emulate(struct trapframe *, struct fpreg *); +int fpu_execute(struct trapframe *, struct fpemu *, union instr *); + +/* fpu_add.c */ +struct fpn *fpu_add(struct fpemu *); + +/* fpu_compare.c */ +void fpu_compare(struct fpemu *, int); + +/* fpu_div.c */ +struct fpn *fpu_div(struct fpemu *); + +/* fpu_explode.c */ +int fpu_itof(struct fpn *, u_int); +int fpu_xtof(struct fpn *, u_int64_t); +int fpu_stof(struct fpn *, u_int); +int fpu_dtof(struct fpn *, u_int, u_int); +void fpu_explode(struct fpemu *, struct fpn *, int, int); + +/* fpu_implode.c */ +u_int fpu_ftoi(struct fpemu *, struct fpn *); +u_int fpu_ftox(struct fpemu *, struct fpn *, u_int *); +u_int fpu_ftos(struct fpemu *, struct fpn *); +u_int fpu_ftod(struct fpemu *, struct fpn *, u_int *); +void fpu_implode(struct fpemu *, struct fpn *, int, u_int *); + +/* fpu_mul.c */ +struct fpn *fpu_mul(struct fpemu *); + +/* fpu_sqrt.c */ +struct fpn *fpu_sqrt(struct fpemu *); + +/* fpu_subr.c */ +int fpu_shr(struct fpn *, int); +void fpu_norm(struct fpn *); +struct fpn *fpu_newnan(struct fpemu *); |