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!

25 files changed, 7926 insertions, 0 deletions

diff --git a/arch/arm/nwfpe/ARM-gcc.h b/arch/arm/nwfpe/ARM-gcc.h
new file mode 100644
index 00000000000..e6598470b07
--- /dev/null
+++ b/arch/arm/nwfpe/ARM-gcc.h
@@ -0,0 +1,120 @@
+/*
+-------------------------------------------------------------------------------
+The macro `BITS64' can be defined to indicate that 64-bit integer types are
+supported by the compiler.
+-------------------------------------------------------------------------------
+*/
+#define BITS64
+
+/*
+-------------------------------------------------------------------------------
+Each of the following `typedef's defines the most convenient type that holds
+integers of at least as many bits as specified.  For example, `uint8' should
+be the most convenient type that can hold unsigned integers of as many as
+8 bits.  The `flag' type must be able to hold either a 0 or 1.  For most
+implementations of C, `flag', `uint8', and `int8' should all be `typedef'ed
+to the same as `int'.
+-------------------------------------------------------------------------------
+*/
+typedef char flag;
+typedef unsigned char uint8;
+typedef signed char int8;
+typedef int uint16;
+typedef int int16;
+typedef unsigned int uint32;
+typedef signed int int32;
+#ifdef BITS64
+typedef unsigned long long int bits64;
+typedef signed long long int sbits64;
+#endif
+
+/*
+-------------------------------------------------------------------------------
+Each of the following `typedef's defines a type that holds integers
+of _exactly_ the number of bits specified.  For instance, for most
+implementation of C, `bits16' and `sbits16' should be `typedef'ed to
+`unsigned short int' and `signed short int' (or `short int'), respectively.
+-------------------------------------------------------------------------------
+*/
+typedef unsigned char bits8;
+typedef signed char sbits8;
+typedef unsigned short int bits16;
+typedef signed short int sbits16;
+typedef unsigned int bits32;
+typedef signed int sbits32;
+#ifdef BITS64
+typedef unsigned long long int uint64;
+typedef signed long long int int64;
+#endif
+
+#ifdef BITS64
+/*
+-------------------------------------------------------------------------------
+The `LIT64' macro takes as its argument a textual integer literal and if
+necessary ``marks'' the literal as having a 64-bit integer type.  For
+example, the Gnu C Compiler (`gcc') requires that 64-bit literals be
+appended with the letters `LL' standing for `long long', which is `gcc's
+name for the 64-bit integer type.  Some compilers may allow `LIT64' to be
+defined as the identity macro:  `#define LIT64( a ) a'.
+-------------------------------------------------------------------------------
+*/
+#define LIT64( a ) a##LL
+#endif
+
+/*
+-------------------------------------------------------------------------------
+The macro `INLINE' can be used before functions that should be inlined.  If
+a compiler does not support explicit inlining, this macro should be defined
+to be `static'.
+-------------------------------------------------------------------------------
+*/
+#define INLINE extern __inline__
+
+
+/* For use as a GCC soft-float library we need some special function names. */
+
+#ifdef __LIBFLOAT__
+
+/* Some 32-bit ops can be mapped straight across by just changing the name. */
+#define float32_add			__addsf3
+#define float32_sub			__subsf3
+#define float32_mul			__mulsf3
+#define float32_div			__divsf3
+#define int32_to_float32		__floatsisf
+#define float32_to_int32_round_to_zero	__fixsfsi
+#define float32_to_uint32_round_to_zero	__fixunssfsi
+
+/* These ones go through the glue code.  To avoid namespace pollution
+   we rename the internal functions too.  */
+#define float32_eq			___float32_eq
+#define float32_le			___float32_le
+#define float32_lt			___float32_lt
+
+/* All the 64-bit ops have to go through the glue, so we pull the same
+   trick.  */
+#define float64_add			___float64_add
+#define float64_sub			___float64_sub
+#define float64_mul			___float64_mul
+#define float64_div			___float64_div
+#define int32_to_float64		___int32_to_float64
+#define float64_to_int32_round_to_zero	___float64_to_int32_round_to_zero
+#define float64_to_uint32_round_to_zero	___float64_to_uint32_round_to_zero
+#define float64_to_float32		___float64_to_float32
+#define float32_to_float64		___float32_to_float64
+#define float64_eq			___float64_eq
+#define float64_le			___float64_le
+#define float64_lt			___float64_lt
+
+#if 0
+#define float64_add			__adddf3
+#define float64_sub			__subdf3
+#define float64_mul			__muldf3
+#define float64_div			__divdf3
+#define int32_to_float64		__floatsidf
+#define float64_to_int32_round_to_zero	__fixdfsi
+#define float64_to_uint32_round_to_zero	__fixunsdfsi
+#define float64_to_float32		__truncdfsf2
+#define float32_to_float64		__extendsfdf2
+#endif
+
+#endif
diff --git a/arch/arm/nwfpe/ChangeLog b/arch/arm/nwfpe/ChangeLog
new file mode 100644
index 00000000000..eeb5a7c5ff0
--- /dev/null
+++ b/arch/arm/nwfpe/ChangeLog
@@ -0,0 +1,91 @@
+2003-03-22  Ralph Siemsen <ralphs@netwinder.org>
+	* Reformat all but softfloat files to get a consistent coding style.
+	  Used "indent -kr -i8 -ts8 -sob -l132 -ss" and a few manual fixups.
+	* Removed dead code and fixed function protypes to match definitions.
+	* Consolidated use of (opcode && MASK_ARITHMETIC_OPCODE) >> 20.
+	* Make 80-bit precision a compile-time option. (1%)
+	* Only initialize FPE state once in repeat-FP situations. (6%)
+
+2002-01-19  Russell King <rmk@arm.linux.org.uk>
+
+	* fpa11.h - Add documentation
+	          - remove userRegisters pointer from this structure.
+	          - add new method to obtain integer register values.
+	* softfloat.c - Remove float128
+	* softfloat.h - Remove float128
+	* softfloat-specialize - Remove float128
+
+	* The FPA11 structure is not a kernel-specific data structure.
+	  It is used by users of ptrace to examine the values of the
+	  floating point registers.  Therefore, any changes to the
+	  FPA11 structure (size or position of elements contained
+	  within) have to be well thought out.
+
+	* Since 128-bit float requires the FPA11 structure to change
+	  size, it has been removed.  128-bit float is currently unused,
+	  and needs various things to be re-worked so that we won't
+	  overflow the available space in the task structure.
+
+	* The changes are designed to break any patch that goes on top
+	  of this code, so that the authors properly review their changes.
+
+1999-08-19  Scott Bambrough  <scottb@netwinder.org>
+
+	* fpmodule.c - Changed version number to 0.95
+	* fpa11.h - modified FPA11, FPREG structures
+	* fpa11.c - Changes due to FPA11, FPREG structure alterations.
+	* fpa11_cpdo.c - Changes due to FPA11, FPREG structure alterations.
+	* fpa11_cpdt.c - Changes due to FPA11, FPREG structure alterations.
+	* fpa11_cprt.c - Changes due to FPA11, FPREG structure alterations.
+	* single_cpdo.c - Changes due to FPA11, FPREG structure alterations.
+	* double_cpdo.c - Changes due to FPA11, FPREG structure alterations.
+	* extended_cpdo.c - Changes due to FPA11, FPREG structure alterations.
+
+	* I discovered several bugs.  First and worst is that the kernel
+	  passes in a pointer to the FPE's state area.	This is defined
+	  as a struct user_fp (see user.h).  This pointer was cast to a
+	  FPA11*.  Unfortunately FPA11 and user_fp are of different sizes;
+	  user_fp is smaller.  This meant that the FPE scribbled on things
+	  below its area, which is bad, as the area is in the thread_struct
+	  embedded in the process task structure.  Thus we were scribbling
+	  over one of the most important structures in the entire OS.
+
+	* user_fp and FPA11 have now been harmonized.  Most of the changes
+	  in the above code were dereferencing problems due to moving the
+	  register type out of FPREG, and getting rid of the union variable
+	  fpvalue.
+
+	* Second I noticed resetFPA11 was not always being called for a
+	  task.  This should happen on the first floating point exception
+	  that occurs.	It is controlled by init_flag in FPA11.  The
+	  comment in the code beside init_flag state the kernel guarantees
+	  this to be zero.  Not so.  I found that the kernel recycles task
+	  structures, and that recycled ones may not have init_flag zeroed.
+	  I couldn't even find anything that guarantees it is zeroed when
+	  when the task structure is initially allocated.  In any case
+	  I now initialize the entire FPE state in the thread structure to
+	  zero when allocated and recycled.  See alloc_task_struct() and
+	  flush_thread() in arch/arm/process.c.  The change to
+	  alloc_task_struct() may not be necessary, but I left it in for
+	  completeness (better safe than sorry).
+
+1998-11-23  Scott Bambrough  <scottb@netwinder.org>
+
+	* README.FPE - fix typo in description of lfm/sfm instructions
+	* NOTES - Added file to describe known bugs/problems 
+	* fpmodule.c - Changed version number to 0.94
+
+1998-11-20  Scott Bambrough  <scottb@netwinder.org>
+
+	* README.FPE - fix description of URD, NRM instructions
+	* TODO - remove URD, NRM instructions from TODO list
+	* single_cpdo.c - implement URD, NRM
+	* double_cpdo.c - implement URD, NRM
+	* extended_cpdo.c - implement URD, NRM
+
+1998-11-19  Scott Bambrough  <scottb@netwinder.org>
+
+	* ChangeLog - Added this file to track changes made.
+	* fpa11.c - added code to initialize register types to typeNone
+	* fpa11_cpdt.c - fixed bug in storeExtended (typeExtended changed to
+	  typeDouble in switch statement)
diff --git a/arch/arm/nwfpe/Makefile b/arch/arm/nwfpe/Makefile
new file mode 100644
index 00000000000..ed7b26bf73f
--- /dev/null
+++ b/arch/arm/nwfpe/Makefile
@@ -0,0 +1,13 @@
+#
+# Copyright (C) 1998, 1999, 2001 Philip Blundell
+#
+
+obj-$(CONFIG_FPE_NWFPE)		+= nwfpe.o
+
+nwfpe-y				+= fpa11.o fpa11_cpdo.o fpa11_cpdt.o \
+				   fpa11_cprt.o fpmodule.o fpopcode.o \
+				   softfloat.o single_cpdo.o double_cpdo.o
+
+nwfpe-$(CONFIG_FPE_NWFPE_XP)	+= extended_cpdo.o
+nwfpe-$(CONFIG_CPU_26)		+= entry26.o
+nwfpe-$(CONFIG_CPU_32)		+= entry.o
diff --git a/arch/arm/nwfpe/double_cpdo.c b/arch/arm/nwfpe/double_cpdo.c
new file mode 100644
index 00000000000..7ffd8cb9bc9
--- /dev/null
+++ b/arch/arm/nwfpe/double_cpdo.c
@@ -0,0 +1,167 @@
+/*
+    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.
+*/
+
+#include "fpa11.h"
+#include "softfloat.h"
+#include "fpopcode.h"
+
+union float64_components {
+	float64 f64;
+	unsigned int i[2];
+};
+
+float64 float64_exp(float64 Fm);
+float64 float64_ln(float64 Fm);
+float64 float64_sin(float64 rFm);
+float64 float64_cos(float64 rFm);
+float64 float64_arcsin(float64 rFm);
+float64 float64_arctan(float64 rFm);
+float64 float64_log(float64 rFm);
+float64 float64_tan(float64 rFm);
+float64 float64_arccos(float64 rFm);
+float64 float64_pow(float64 rFn, float64 rFm);
+float64 float64_pol(float64 rFn, float64 rFm);
+
+static float64 float64_rsf(float64 rFn, float64 rFm)
+{
+	return float64_sub(rFm, rFn);
+}
+
+static float64 float64_rdv(float64 rFn, float64 rFm)
+{
+	return float64_div(rFm, rFn);
+}
+
+static float64 (*const dyadic_double[16])(float64 rFn, float64 rFm) = {
+	[ADF_CODE >> 20] = float64_add,
+	[MUF_CODE >> 20] = float64_mul,
+	[SUF_CODE >> 20] = float64_sub,
+	[RSF_CODE >> 20] = float64_rsf,
+	[DVF_CODE >> 20] = float64_div,
+	[RDF_CODE >> 20] = float64_rdv,
+	[RMF_CODE >> 20] = float64_rem,
+
+	/* strictly, these opcodes should not be implemented */
+	[FML_CODE >> 20] = float64_mul,
+	[FDV_CODE >> 20] = float64_div,
+	[FRD_CODE >> 20] = float64_rdv,
+};
+
+static float64 float64_mvf(float64 rFm)
+{
+	return rFm;
+}
+
+static float64 float64_mnf(float64 rFm)
+{
+	union float64_components u;
+
+	u.f64 = rFm;
+#ifdef __ARMEB__
+	u.i[0] ^= 0x80000000;
+#else
+	u.i[1] ^= 0x80000000;
+#endif
+
+	return u.f64;
+}
+
+static float64 float64_abs(float64 rFm)
+{
+	union float64_components u;
+
+	u.f64 = rFm;
+#ifdef __ARMEB__
+	u.i[0] &= 0x7fffffff;
+#else
+	u.i[1] &= 0x7fffffff;
+#endif
+
+	return u.f64;
+}
+
+static float64 (*const monadic_double[16])(float64 rFm) = {
+	[MVF_CODE >> 20] = float64_mvf,
+	[MNF_CODE >> 20] = float64_mnf,
+	[ABS_CODE >> 20] = float64_abs,
+	[RND_CODE >> 20] = float64_round_to_int,
+	[URD_CODE >> 20] = float64_round_to_int,
+	[SQT_CODE >> 20] = float64_sqrt,
+	[NRM_CODE >> 20] = float64_mvf,
+};
+
+unsigned int DoubleCPDO(const unsigned int opcode, FPREG * rFd)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	float64 rFm;
+	unsigned int Fm, opc_mask_shift;
+
+	Fm = getFm(opcode);
+	if (CONSTANT_FM(opcode)) {
+		rFm = getDoubleConstant(Fm);
+	} else {
+		switch (fpa11->fType[Fm]) {
+		case typeSingle:
+			rFm = float32_to_float64(fpa11->fpreg[Fm].fSingle);
+			break;
+
+		case typeDouble:
+			rFm = fpa11->fpreg[Fm].fDouble;
+			break;
+
+		default:
+			return 0;
+		}
+	}
+
+	opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20;
+	if (!MONADIC_INSTRUCTION(opcode)) {
+		unsigned int Fn = getFn(opcode);
+		float64 rFn;
+
+		switch (fpa11->fType[Fn]) {
+		case typeSingle:
+			rFn = float32_to_float64(fpa11->fpreg[Fn].fSingle);
+			break;
+
+		case typeDouble:
+			rFn = fpa11->fpreg[Fn].fDouble;
+			break;
+
+		default:
+			return 0;
+		}
+
+		if (dyadic_double[opc_mask_shift]) {
+			rFd->fDouble = dyadic_double[opc_mask_shift](rFn, rFm);
+		} else {
+			return 0;
+		}
+	} else {
+		if (monadic_double[opc_mask_shift]) {
+			rFd->fDouble = monadic_double[opc_mask_shift](rFm);
+		} else {
+			return 0;
+		}
+	}
+
+	return 1;
+}
diff --git a/arch/arm/nwfpe/entry.S b/arch/arm/nwfpe/entry.S
new file mode 100644
index 00000000000..1dc13bc6d81
--- /dev/null
+++ b/arch/arm/nwfpe/entry.S
@@ -0,0 +1,119 @@
+/*
+    NetWinder Floating Point Emulator
+    (c) Rebel.COM, 1998
+    (c) 1998, 1999 Philip Blundell
+
+    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.
+*/
+
+/* This is the kernel's entry point into the floating point emulator.
+It is called from the kernel with code similar to this:
+
+	sub	r4, r5, #4
+	ldrt	r0, [r4]			@ r0  = instruction
+	adrsvc	al, r9, ret_from_exception	@ r9  = normal FP return
+	adrsvc	al, lr, fpundefinstr		@ lr  = undefined instr return
+
+	get_current_task r10
+	mov	r8, #1
+	strb	r8, [r10, #TSK_USED_MATH]	@ set current->used_math
+	add	r10, r10, #TSS_FPESAVE		@ r10 = workspace
+	ldr	r4, .LC2
+	ldr	pc, [r4]			@ Call FP emulator entry point
+
+The kernel expects the emulator to return via one of two possible
+points of return it passes to the emulator.  The emulator, if
+successful in its emulation, jumps to ret_from_exception (passed in
+r9) and the kernel takes care of returning control from the trap to
+the user code.  If the emulator is unable to emulate the instruction,
+it returns via _fpundefinstr (passed via lr) and the kernel halts the
+user program with a core dump.
+
+On entry to the emulator r10 points to an area of private FP workspace
+reserved in the thread structure for this process.  This is where the
+emulator saves its registers across calls.  The first word of this area
+is used as a flag to detect the first time a process uses floating point,
+so that the emulator startup cost can be avoided for tasks that don't
+want it.
+
+This routine does three things:
+
+1) The kernel has created a struct pt_regs on the stack and saved the
+user registers into it.  See /usr/include/asm/proc/ptrace.h for details.
+
+2) It calls EmulateAll to emulate a floating point instruction.
+EmulateAll returns 1 if the emulation was successful, or 0 if not.
+
+3) If an instruction has been emulated successfully, it looks ahead at
+the next instruction.  If it is a floating point instruction, it
+executes the instruction, without returning to user space.  In this
+way it repeatedly looks ahead and executes floating point instructions
+until it encounters a non floating point instruction, at which time it
+returns via _fpreturn.
+
+This is done to reduce the effect of the trap overhead on each
+floating point instructions.  GCC attempts to group floating point
+instructions to allow the emulator to spread the cost of the trap over
+several floating point instructions.  */
+
+	.globl	nwfpe_enter
+nwfpe_enter:
+	mov	r4, lr			@ save the failure-return addresses
+	mov	sl, sp			@ we access the registers via 'sl'
+
+	ldr	r5, [sp, #60]		@ get contents of PC;
+emulate:
+	bl	EmulateAll		@ emulate the instruction
+	cmp	r0, #0			@ was emulation successful
+	moveq	pc, r4			@ no, return failure
+
+next:
+.Lx1:	ldrt	r6, [r5], #4		@ get the next instruction and
+					@ increment PC
+
+	and	r2, r6, #0x0F000000	@ test for FP insns
+	teq	r2, #0x0C000000
+	teqne	r2, #0x0D000000
+	teqne	r2, #0x0E000000
+	movne	pc, r9			@ return ok if not a fp insn
+
+	str	r5, [sp, #60]		@ update PC copy in regs
+
+	mov	r0, r6			@ save a copy
+	ldr	r1, [sp, #64]		@ fetch the condition codes
+	bl	checkCondition		@ check the condition
+	cmp	r0, #0			@ r0 = 0 ==> condition failed
+
+	@ if condition code failed to match, next insn
+	beq	next			@ get the next instruction;
+
+	mov	r0, r6			@ prepare for EmulateAll()
+	b	emulate			@ if r0 != 0, goto EmulateAll
+
+	@ We need to be prepared for the instructions at .Lx1 and .Lx2 
+	@ to fault.  Emit the appropriate exception gunk to fix things up.
+	@ ??? For some reason, faults can happen at .Lx2 even with a
+	@ plain LDR instruction.  Weird, but it seems harmless.
+	.section .fixup,"ax"
+	.align	2
+.Lfix:	mov	pc, r9			@ let the user eat segfaults
+	.previous
+
+	.section __ex_table,"a"
+	.align	3
+	.long	.Lx1, .Lfix
+	.previous
diff --git a/arch/arm/nwfpe/entry26.S b/arch/arm/nwfpe/entry26.S
new file mode 100644
index 00000000000..0ed38b0913d
--- /dev/null
+++ b/arch/arm/nwfpe/entry26.S
@@ -0,0 +1,112 @@
+/*
+    NetWinder Floating Point Emulator
+    (c) Rebel.COM, 1998
+    (c) Philip Blundell 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.
+*/
+
+#include <asm/constants.h>
+
+/* This is the kernel's entry point into the floating point emulator.
+It is called from the kernel with code similar to this:
+
+	mov	fp, #0
+	teqp	pc, #PSR_I_BIT | MODE_SVC
+	ldr	r4, .LC2
+	ldr	pc, [r4]		@ Call FP module USR entry point
+
+The kernel expects the emulator to return via one of two possible
+points of return it passes to the emulator.  The emulator, if
+successful in its emulation, jumps to ret_from_exception and the
+kernel takes care of returning control from the trap to the user code.
+If the emulator is unable to emulate the instruction, it returns to
+fpundefinstr and the kernel halts the user program with a core dump.
+
+This routine does four things:
+
+1) It saves SP into a variable called userRegisters.  The kernel has
+created a struct pt_regs on the stack and saved the user registers
+into it.  See /usr/include/asm/proc/ptrace.h for details.  The
+emulator code uses userRegisters as the base of an array of words from
+which the contents of the registers can be extracted.
+
+2) It locates the FP emulator work area within the TSS structure and
+points `fpa11' to it.
+
+3) It calls EmulateAll to emulate a floating point instruction.
+EmulateAll returns 1 if the emulation was successful, or 0 if not.
+
+4) If an instruction has been emulated successfully, it looks ahead at
+the next instruction.  If it is a floating point instruction, it
+executes the instruction, without returning to user space.  In this
+way it repeatedly looks ahead and executes floating point instructions
+until it encounters a non floating point instruction, at which time it
+returns via _fpreturn.
+
+This is done to reduce the effect of the trap overhead on each
+floating point instructions.  GCC attempts to group floating point
+instructions to allow the emulator to spread the cost of the trap over
+several floating point instructions.  */
+
+	.globl	nwfpe_enter
+nwfpe_enter:
+	mov	sl, sp
+	ldr	r5, [sp, #60]		@ get contents of PC
+	bic	r5, r5, #0xfc000003
+	ldr	r0, [r5, #-4]		@ get actual instruction into r0
+	bl	EmulateAll		@ emulate the instruction
+1:	cmp	r0, #0			@ was emulation successful
+	beq	fpundefinstr		@ no, return failure
+
+next:
+.Lx1:	ldrt	r6, [r5], #4		@ get the next instruction and
+					@ increment PC
+
+	and	r2, r6, #0x0F000000	@ test for FP insns
+	teq	r2, #0x0C000000
+	teqne	r2, #0x0D000000
+	teqne	r2, #0x0E000000
+	bne	ret_from_exception	@ return ok if not a fp insn
+
+	ldr	r9, [sp, #60]		@ get new condition codes
+	and	r9, r9, #0xfc000003
+	orr	r7, r5, r9
+	str	r7, [sp, #60]		@ update PC copy in regs
+
+	mov	r0, r6			@ save a copy
+	mov	r1, r9			@ fetch the condition codes
+	bl	checkCondition		@ check the condition
+	cmp	r0, #0			@ r0 = 0 ==> condition failed
+
+	@ if condition code failed to match, next insn
+	beq	next			@ get the next instruction;
+
+	mov	r0, r6			@ prepare for EmulateAll()
+	adr	lr, 1b
+	orr	lr, lr, #3
+	b	EmulateAll		@ if r0 != 0, goto EmulateAll
+
+.Lret:	b	ret_from_exception	@ let the user eat segfaults
+	
+	@ We need to be prepared for the instruction at .Lx1 to fault.
+	@ Emit the appropriate exception gunk to fix things up.
+	.section __ex_table,"a"
+	.align	3
+	.long	.Lx1
+	ldr	lr, [lr, $(.Lret - .Lx1)/4]
+	.previous
diff --git a/arch/arm/nwfpe/extended_cpdo.c b/arch/arm/nwfpe/extended_cpdo.c
new file mode 100644
index 00000000000..c39f68a3449
--- /dev/null
+++ b/arch/arm/nwfpe/extended_cpdo.c
@@ -0,0 +1,154 @@
+/*
+    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.
+*/
+
+#include "fpa11.h"
+#include "softfloat.h"
+#include "fpopcode.h"
+
+floatx80 floatx80_exp(floatx80 Fm);
+floatx80 floatx80_ln(floatx80 Fm);
+floatx80 floatx80_sin(floatx80 rFm);
+floatx80 floatx80_cos(floatx80 rFm);
+floatx80 floatx80_arcsin(floatx80 rFm);
+floatx80 floatx80_arctan(floatx80 rFm);
+floatx80 floatx80_log(floatx80 rFm);
+floatx80 floatx80_tan(floatx80 rFm);
+floatx80 floatx80_arccos(floatx80 rFm);
+floatx80 floatx80_pow(floatx80 rFn, floatx80 rFm);
+floatx80 floatx80_pol(floatx80 rFn, floatx80 rFm);
+
+static floatx80 floatx80_rsf(floatx80 rFn, floatx80 rFm)
+{
+	return floatx80_sub(rFm, rFn);
+}
+
+static floatx80 floatx80_rdv(floatx80 rFn, floatx80 rFm)
+{
+	return floatx80_div(rFm, rFn);
+}
+
+static floatx80 (*const dyadic_extended[16])(floatx80 rFn, floatx80 rFm) = {
+	[ADF_CODE >> 20] = floatx80_add,
+	[MUF_CODE >> 20] = floatx80_mul,
+	[SUF_CODE >> 20] = floatx80_sub,
+	[RSF_CODE >> 20] = floatx80_rsf,
+	[DVF_CODE >> 20] = floatx80_div,
+	[RDF_CODE >> 20] = floatx80_rdv,
+	[RMF_CODE >> 20] = floatx80_rem,
+
+	/* strictly, these opcodes should not be implemented */
+	[FML_CODE >> 20] = floatx80_mul,
+	[FDV_CODE >> 20] = floatx80_div,
+	[FRD_CODE >> 20] = floatx80_rdv,
+};
+
+static floatx80 floatx80_mvf(floatx80 rFm)
+{
+	return rFm;
+}
+
+static floatx80 floatx80_mnf(floatx80 rFm)
+{
+	rFm.high ^= 0x8000;
+	return rFm;
+}
+
+static floatx80 floatx80_abs(floatx80 rFm)
+{
+	rFm.high &= 0x7fff;
+	return rFm;
+}
+
+static floatx80 (*const monadic_extended[16])(floatx80 rFm) = {
+	[MVF_CODE >> 20] = floatx80_mvf,
+	[MNF_CODE >> 20] = floatx80_mnf,
+	[ABS_CODE >> 20] = floatx80_abs,
+	[RND_CODE >> 20] = floatx80_round_to_int,
+	[URD_CODE >> 20] = floatx80_round_to_int,
+	[SQT_CODE >> 20] = floatx80_sqrt,
+	[NRM_CODE >> 20] = floatx80_mvf,
+};
+
+unsigned int ExtendedCPDO(const unsigned int opcode, FPREG * rFd)
+{
+	FPA11 *fpa11 = GET_FPA11();
+	floatx80 rFm;
+	unsigned int Fm, opc_mask_shift;
+
+	Fm = getFm(opcode);
+	if (CONSTANT_FM(opcode)) {
+		rFm = getExtendedConstant(Fm);
+	} else {
+		switch (fpa11->fType[Fm]) {
+		case typeSingle:
+			rFm = float32_to_floatx80(fpa11->fpreg[Fm].fSingle);
+			break;
+
+		case typeDouble:
+			rFm = float64_to_floatx80(fpa11->fpreg[Fm].fDouble);
+			break;
+
+		case typeExtended:
+			rFm = fpa11->fpreg[Fm].fExtended;
+			break;
+
+		default:
+			return 0;
+		}
+	}
+
+	opc_mask_shift = (opcode & MASK_ARITHMETIC_OPCODE) >> 20;
+	if (!MONADIC_INSTRUCTION(opcode)) {
+		unsigned int Fn = getFn(opcode);
+		floatx80 rFn;
+
+		switch (fpa11->fType[Fn]) {
+		case typeSingle:
+			rFn = float32_to_floatx80(fpa11->fpreg[Fn].fSingle);
+			break;
+
+		case typeDouble:
+			rFn = float64_to_floatx80(fpa11->fpreg[Fn].fDouble);
+			break;
+
+		case typeExtended:
+			rFn = fpa11->fpreg[Fn].fExtended;
+			break;
+
+		default:
+			return 0;
+		}
+
+		if (dyadic_extended[opc_mask_shift]) {
+			rFd->fExtended = dyadic_extended[opc_mask_shift](rFn, rFm);
+		} else {
+			return 0;
+		}
+	} else {
+		if (monadic_extended[opc_mask_shift]) {
+			rFd->fExtended = monadic_extended[opc_mask_shift](rFm);
+		} else {
+			return 0;
+		}
+	}
+
+	return 1;
+}
diff --git a/arch/arm/nwfpe/fpa11.c b/arch/arm/nwfpe/fpa11.c
new file mode 100644
index 00000000000..bf61696865e
--- /dev/null
+++ b/arch/arm/nwfpe/fpa11.c
@@ -0,0 +1,143 @@
+/*
+    NetWinder Floating Point Emulator
+    (c) Rebel.COM, 1998,1999
+    (c) Philip Blundell, 2001
+
+    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.
+*/
+
+#include "fpa11.h"
+#include "fpopcode.h"
+
+#include "fpmodule.h"
+#include "fpmodule.inl"
+
+#include <linux/config.h>
+#include <linux/compiler.h>
+#include <linux/string.h>
+#include <asm/system.h>
+
+/* forward declarations */
+unsigned int EmulateCPDO(const unsigned int);
+unsigned int EmulateCPDT(const unsigned int);
+unsigned int