Move target-arm/nwfpe into linux-user/arm/nwfpe

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4185 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 122 insertions, 0 deletions

diff --git a/linux-user/arm/nwfpe/fpa11.h b/linux-user/arm/nwfpe/fpa11.h
new file mode 100644
index 0000000000..4fc0b3b886
--- /dev/null
+++ b/linux-user/arm/nwfpe/fpa11.h
@@ -0,0 +1,122 @@
+/*
+    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__
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include <cpu.h>
+
+#define GET_FPA11() (qemufpa)
+
+/*
+ * 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.
+ */
+extern CPUARMState *user_registers;
+
+#define GET_USERREG() (user_registers)
+
+/* Need task_struct */
+//#include <linux/sched.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. */
+    float_status fp_status;      /* QEMU float emulator status */
+} FPA11;
+
+extern FPA11* qemufpa;
+
+extern void resetFPA11(void);
+extern void SetRoundingMode(const unsigned int);
+extern void SetRoundingPrecision(const unsigned int);
+
+static inline unsigned int readRegister(unsigned int reg)
+{
+    return (user_registers->regs[(reg)]);
+}
+
+static inline void writeRegister(unsigned int x, unsigned int y)
+{
+#if 0
+	printf("writing %d to r%d\n",y,x);
+#endif
+        user_registers->regs[(x)]=(y);
+}
+
+static inline void writeConditionCodes(unsigned int x)
+{
+        cpsr_write(user_registers,x,CPSR_NZCV);
+}
+
+#define REG_PC 15
+
+unsigned int EmulateAll(unsigned int opcode, FPA11* qfpa, CPUARMState* qregs);
+
+/* included only for get_user/put_user macros */
+#include "qemu.h"
+
+#endif