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

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 *);