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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm26/nwfpe/fpa11.h
downloadlinux-stericsson-2.6.12-rc2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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diff --git a/arch/arm26/nwfpe/fpa11.h b/arch/arm26/nwfpe/fpa11.h
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+/*
+ NetWinder Floating Point Emulator
+ (c) Rebel.com, 1998-1999
+
+ Direct questions, comments to Scott Bambrough <scottb@netwinder.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __FPA11_H__
+#define __FPA11_H__
+
+#define GET_FPA11() ((FPA11 *)(&current_thread_info()->fpstate))
+
+/*
+ * The processes registers are always at the very top of the 8K
+ * stack+task struct. Use the same method as 'current' uses to
+ * reach them.
+ */
+register unsigned int *user_registers asm("sl");
+
+#define GET_USERREG() (user_registers)
+
+#include <linux/thread_info.h>
+
+/* includes */
+#include "fpsr.h" /* FP control and status register definitions */
+#include "softfloat.h"
+
+#define typeNone 0x00
+#define typeSingle 0x01
+#define typeDouble 0x02
+#define typeExtended 0x03
+
+/*
+ * This must be no more and no less than 12 bytes.
+ */
+typedef union tagFPREG {
+ floatx80 fExtended;
+ float64 fDouble;
+ float32 fSingle;
+} FPREG;
+
+/*
+ * FPA11 device model.
+ *
+ * This structure is exported to user space. Do not re-order.
+ * Only add new stuff to the end, and do not change the size of
+ * any element. Elements of this structure are used by user
+ * space, and must match struct user_fp in include/asm-arm/user.h.
+ * We include the byte offsets below for documentation purposes.
+ *
+ * The size of this structure and FPREG are checked by fpmodule.c
+ * on initialisation. If the rules have been broken, NWFPE will
+ * not initialise.
+ */
+typedef struct tagFPA11 {
+/* 0 */ FPREG fpreg[8]; /* 8 floating point registers */
+/* 96 */ FPSR fpsr; /* floating point status register */
+/* 100 */ FPCR fpcr; /* floating point control register */
+/* 104 */ unsigned char fType[8]; /* type of floating point value held in
+ floating point registers. One of none
+ single, double or extended. */
+/* 112 */ int initflag; /* this is special. The kernel guarantees
+ to set it to 0 when a thread is launched,
+ so we can use it to detect whether this
+ instance of the emulator needs to be
+ initialised. */
+} FPA11;
+
+extern void resetFPA11(void);
+extern void SetRoundingMode(const unsigned int);
+extern void SetRoundingPrecision(const unsigned int);
+
+#endif