Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

8 files changed, 4175 insertions, 0 deletions

diff --git a/arch/arm/vfp/Makefile b/arch/arm/vfp/Makefile
new file mode 100644
index 000000000..749901a72
--- /dev/null
+++ b/arch/arm/vfp/Makefile
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# linux/arch/arm/vfp/Makefile
+#
+# Copyright (C) 2001 ARM Limited
+#
+
+# ccflags-y := -DDEBUG
+# asflags-y := -DDEBUG
+
+obj-y		+= vfpmodule.o entry.o vfphw.o vfpsingle.o vfpdouble.o
diff --git a/arch/arm/vfp/entry.S b/arch/arm/vfp/entry.S
new file mode 100644
index 000000000..27b0a1f27
--- /dev/null
+++ b/arch/arm/vfp/entry.S
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  linux/arch/arm/vfp/entry.S
+ *
+ *  Copyright (C) 2004 ARM Limited.
+ *  Written by Deep Blue Solutions Limited.
+ */
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/vfpmacros.h>
+#include <asm/assembler.h>
+#include <asm/asm-offsets.h>
+
+@ VFP entry point.
+@
+@  r0  = instruction opcode (32-bit ARM or two 16-bit Thumb)
+@  r2  = PC value to resume execution after successful emulation
+@  r9  = normal "successful" return address
+@  r10 = this threads thread_info structure
+@  lr  = unrecognised instruction return address
+@  IRQs enabled.
+@
+ENTRY(do_vfp)
+	inc_preempt_count r10, r4
+ 	ldr	r4, .LCvfp
+	ldr	r11, [r10, #TI_CPU]	@ CPU number
+	add	r10, r10, #TI_VFPSTATE	@ r10 = workspace
+	ldr	pc, [r4]		@ call VFP entry point
+ENDPROC(do_vfp)
+
+ENTRY(vfp_null_entry)
+	dec_preempt_count_ti r10, r4
+	ret	lr
+ENDPROC(vfp_null_entry)
+
+	.align	2
+.LCvfp:
+	.word	vfp_vector
diff --git a/arch/arm/vfp/vfp.h b/arch/arm/vfp/vfp.h
new file mode 100644
index 000000000..5cd6d5053
--- /dev/null
+++ b/arch/arm/vfp/vfp.h
@@ -0,0 +1,377 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  linux/arch/arm/vfp/vfp.h
+ *
+ *  Copyright (C) 2004 ARM Limited.
+ *  Written by Deep Blue Solutions Limited.
+ */
+
+static inline u32 vfp_shiftright32jamming(u32 val, unsigned int shift)
+{
+	if (shift) {
+		if (shift < 32)
+			val = val >> shift | ((val << (32 - shift)) != 0);
+		else
+			val = val != 0;
+	}
+	return val;
+}
+
+static inline u64 vfp_shiftright64jamming(u64 val, unsigned int shift)
+{
+	if (shift) {
+		if (shift < 64)
+			val = val >> shift | ((val << (64 - shift)) != 0);
+		else
+			val = val != 0;
+	}
+	return val;
+}
+
+static inline u32 vfp_hi64to32jamming(u64 val)
+{
+	u32 v;
+
+	asm(
+	"cmp	%Q1, #1		@ vfp_hi64to32jamming\n\t"
+	"movcc	%0, %R1\n\t"
+	"orrcs	%0, %R1, #1"
+	: "=r" (v) : "r" (val) : "cc");
+
+	return v;
+}
+
+static inline void add128(u64 *resh, u64 *resl, u64 nh, u64 nl, u64 mh, u64 ml)
+{
+	asm(	"adds	%Q0, %Q2, %Q4\n\t"
+		"adcs	%R0, %R2, %R4\n\t"
+		"adcs	%Q1, %Q3, %Q5\n\t"
+		"adc	%R1, %R3, %R5"
+	    : "=r" (nl), "=r" (nh)
+	    : "0" (nl), "1" (nh), "r" (ml), "r" (mh)
+	    : "cc");
+	*resh = nh;
+	*resl = nl;
+}
+
+static inline void sub128(u64 *resh, u64 *resl, u64 nh, u64 nl, u64 mh, u64 ml)
+{
+	asm(	"subs	%Q0, %Q2, %Q4\n\t"
+		"sbcs	%R0, %R2, %R4\n\t"
+		"sbcs	%Q1, %Q3, %Q5\n\t"
+		"sbc	%R1, %R3, %R5\n\t"
+	    : "=r" (nl), "=r" (nh)
+	    : "0" (nl), "1" (nh), "r" (ml), "r" (mh)
+	    : "cc");
+	*resh = nh;
+	*resl = nl;
+}
+
+static inline void mul64to128(u64 *resh, u64 *resl, u64 n, u64 m)
+{
+	u32 nh, nl, mh, ml;
+	u64 rh, rma, rmb, rl;
+
+	nl = n;
+	ml = m;
+	rl = (u64)nl * ml;
+
+	nh = n >> 32;
+	rma = (u64)nh * ml;
+
+	mh = m >> 32;
+	rmb = (u64)nl * mh;
+	rma += rmb;
+
+	rh = (u64)nh * mh;
+	rh += ((u64)(rma < rmb) << 32) + (rma >> 32);
+
+	rma <<= 32;
+	rl += rma;
+	rh += (rl < rma);
+
+	*resl = rl;
+	*resh = rh;
+}
+
+static inline void shift64left(u64 *resh, u64 *resl, u64 n)
+{
+	*resh = n >> 63;
+	*resl = n << 1;
+}
+
+static inline u64 vfp_hi64multiply64(u64 n, u64 m)
+{
+	u64 rh, rl;
+	mul64to128(&rh, &rl, n, m);
+	return rh | (rl != 0);
+}
+
+static inline u64 vfp_estimate_div128to64(u64 nh, u64 nl, u64 m)
+{
+	u64 mh, ml, remh, reml, termh, terml, z;
+
+	if (nh >= m)
+		return ~0ULL;
+	mh = m >> 32;
+	if (mh << 32 <= nh) {
+		z = 0xffffffff00000000ULL;
+	} else {
+		z = nh;
+		do_div(z, mh);
+		z <<= 32;
+	}
+	mul64to128(&termh, &terml, m, z);
+	sub128(&remh, &reml, nh, nl, termh, terml);
+	ml = m << 32;
+	while ((s64)remh < 0) {
+		z -= 0x100000000ULL;
+		add128(&remh, &reml, remh, reml, mh, ml);
+	}
+	remh = (remh << 32) | (reml >> 32);
+	if (mh << 32 <= remh) {
+		z |= 0xffffffff;
+	} else {
+		do_div(remh, mh);
+		z |= remh;
+	}
+	return z;
+}
+
+/*
+ * Operations on unpacked elements
+ */
+#define vfp_sign_negate(sign)	(sign ^ 0x8000)
+
+/*
+ * Single-precision
+ */
+struct vfp_single {
+	s16	exponent;
+	u16	sign;
+	u32	significand;
+};
+
+asmlinkage s32 vfp_get_float(unsigned int reg);
+asmlinkage void vfp_put_float(s32 val, unsigned int reg);
+
+/*
+ * VFP_SINGLE_MANTISSA_BITS - number of bits in the mantissa
+ * VFP_SINGLE_EXPONENT_BITS - number of bits in the exponent
+ * VFP_SINGLE_LOW_BITS - number of low bits in the unpacked significand
+ *  which are not propagated to the float upon packing.
+ */
+#define VFP_SINGLE_MANTISSA_BITS	(23)
+#define VFP_SINGLE_EXPONENT_BITS	(8)
+#define VFP_SINGLE_LOW_BITS		(32 - VFP_SINGLE_MANTISSA_BITS - 2)
+#define VFP_SINGLE_LOW_BITS_MASK	((1 << VFP_SINGLE_LOW_BITS) - 1)
+
+/*
+ * The bit in an unpacked float which indicates that it is a quiet NaN
+ */
+#define VFP_SINGLE_SIGNIFICAND_QNAN	(1 << (VFP_SINGLE_MANTISSA_BITS - 1 + VFP_SINGLE_LOW_BITS))
+
+/*
+ * Operations on packed single-precision numbers
+ */
+#define vfp_single_packed_sign(v)	((v) & 0x80000000)
+#define vfp_single_packed_negate(v)	((v) ^ 0x80000000)
+#define vfp_single_packed_abs(v)	((v) & ~0x80000000)
+#define vfp_single_packed_exponent(v)	(((v) >> VFP_SINGLE_MANTISSA_BITS) & ((1 << VFP_SINGLE_EXPONENT_BITS) - 1))
+#define vfp_single_packed_mantissa(v)	((v) & ((1 << VFP_SINGLE_MANTISSA_BITS) - 1))
+
+/*
+ * Unpack a single-precision float.  Note that this returns the magnitude
+ * of the single-precision float mantissa with the 1. if necessary,
+ * aligned to bit 30.
+ */
+static inline void vfp_single_unpack(struct vfp_single *s, s32 val)
+{
+	u32 significand;
+
+	s->sign = vfp_single_packed_sign(val) >> 16,
+	s->exponent = vfp_single_packed_exponent(val);
+
+	significand = (u32) val;
+	significand = (significand << (32 - VFP_SINGLE_MANTISSA_BITS)) >> 2;
+	if (s->exponent && s->exponent != 255)
+		significand |= 0x40000000;
+	s->significand = significand;
+}
+
+/*
+ * Re-pack a single-precision float.  This assumes that the float is
+ * already normalised such that the MSB is bit 30, _not_ bit 31.
+ */
+static inline s32 vfp_single_pack(struct vfp_single *s)
+{
+	u32 val;
+	val = (s->sign << 16) +
+	      (s->exponent << VFP_SINGLE_MANTISSA_BITS) +
+	      (s->significand >> VFP_SINGLE_LOW_BITS);
+	return (s32)val;
+}
+
+#define VFP_NUMBER		(1<<0)
+#define VFP_ZERO		(1<<1)
+#define VFP_DENORMAL		(1<<2)
+#define VFP_INFINITY		(1<<3)
+#define VFP_NAN			(1<<4)
+#define VFP_NAN_SIGNAL		(1<<5)
+
+#define VFP_QNAN		(VFP_NAN)
+#define VFP_SNAN		(VFP_NAN|VFP_NAN_SIGNAL)
+
+static inline int vfp_single_type(struct vfp_single *s)
+{
+	int type = VFP_NUMBER;
+	if (s->exponent == 255) {
+		if (s->significand == 0)
+			type = VFP_INFINITY;
+		else if (s->significand & VFP_SINGLE_SIGNIFICAND_QNAN)
+			type = VFP_QNAN;
+		else
+			type = VFP_SNAN;
+	} else if (s->exponent == 0) {
+		if (s->significand == 0)
+			type |= VFP_ZERO;
+		else
+			type |= VFP_DENORMAL;
+	}
+	return type;
+}
+
+#ifndef DEBUG
+#define vfp_single_normaliseround(sd,vsd,fpscr,except,func) __vfp_single_normaliseround(sd,vsd,fpscr,except)
+u32 __vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exceptions);
+#else
+u32 vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exceptions, const char *func);
+#endif
+
+/*
+ * Double-precision
+ */
+struct vfp_double {
+	s16	exponent;
+	u16	sign;
+	u64	significand;
+};
+
+/*
+ * VFP_REG_ZERO is a special register number for vfp_get_double
+ * which returns (double)0.0.  This is useful for the compare with
+ * zero instructions.
+ */
+#ifdef CONFIG_VFPv3
+#define VFP_REG_ZERO	32
+#else
+#define VFP_REG_ZERO	16
+#endif
+asmlinkage u64 vfp_get_double(unsigned int reg);
+asmlinkage void vfp_put_double(u64 val, unsigned int reg);
+
+#define VFP_DOUBLE_MANTISSA_BITS	(52)
+#define VFP_DOUBLE_EXPONENT_BITS	(11)
+#define VFP_DOUBLE_LOW_BITS		(64 - VFP_DOUBLE_MANTISSA_BITS - 2)
+#define VFP_DOUBLE_LOW_BITS_MASK	((1 << VFP_DOUBLE_LOW_BITS) - 1)
+
+/*
+ * The bit in an unpacked double which indicates that it is a quiet NaN
+ */
+#define VFP_DOUBLE_SIGNIFICAND_QNAN	(1ULL << (VFP_DOUBLE_MANTISSA_BITS - 1 + VFP_DOUBLE_LOW_BITS))
+
+/*
+ * Operations on packed single-precision numbers
+ */
+#define vfp_double_packed_sign(v)	((v) & (1ULL << 63))
+#define vfp_double_packed_negate(v)	((v) ^ (1ULL << 63))
+#define vfp_double_packed_abs(v)	((v) & ~(1ULL << 63))
+#define vfp_double_packed_exponent(v)	(((v) >> VFP_DOUBLE_MANTISSA_BITS) & ((1 << VFP_DOUBLE_EXPONENT_BITS) - 1))
+#define vfp_double_packed_mantissa(v)	((v) & ((1ULL << VFP_DOUBLE_MANTISSA_BITS) - 1))
+
+/*
+ * Unpack a double-precision float.  Note that this returns the magnitude
+ * of the double-precision float mantissa with the 1. if necessary,
+ * aligned to bit 62.
+ */
+static inline void vfp_double_unpack(struct vfp_double *s, s64 val)
+{
+	u64 significand;
+
+	s->sign = vfp_double_packed_sign(val) >> 48;
+	s->exponent = vfp_double_packed_exponent(val);
+
+	significand = (u64) val;
+	significand = (significand << (64 - VFP_DOUBLE_MANTISSA_BITS)) >> 2;
+	if (s->exponent && s->exponent != 2047)
+		significand |= (1ULL << 62);
+	s->significand = significand;
+}
+
+/*
+ * Re-pack a double-precision float.  This assumes that the float is
+ * already normalised such that the MSB is bit 30, _not_ bit 31.
+ */
+static inline s64 vfp_double_pack(struct vfp_double *s)
+{
+	u64 val;
+	val = ((u64)s->sign << 48) +
+	      ((u64)s->exponent << VFP_DOUBLE_MANTISSA_BITS) +
+	      (s->significand >> VFP_DOUBLE_LOW_BITS);
+	return (s64)val;
+}
+
+static inline int vfp_double_type(struct vfp_double *s)
+{
+	int type = VFP_NUMBER;
+	if (s->exponent == 2047) {
+		if (s->significand == 0)
+			type = VFP_INFINITY;
+		else if (s->significand & VFP_DOUBLE_SIGNIFICAND_QNAN)
+			type = VFP_QNAN;
+		else
+			type = VFP_SNAN;
+	} else if (s->exponent == 0) {
+		if (s->significand == 0)
+			type |= VFP_ZERO;
+		else
+			type |= VFP_DENORMAL;
+	}
+	return type;
+}
+
+u32 vfp_double_normaliseround(int dd, struct vfp_double *vd, u32 fpscr, u32 exceptions, const char *func);
+
+u32 vfp_estimate_sqrt_significand(u32 exponent, u32 significand);
+
+/*
+ * A special flag to tell the normalisation code not to normalise.
+ */
+#define VFP_NAN_FLAG	0x100
+
+/*
+ * A bit pattern used to indicate the initial (unset) value of the
+ * exception mask, in case nothing handles an instruction.  This
+ * doesn't include the NAN flag, which get masked out before
+ * we check for an error.
+ */
+#define VFP_EXCEPTION_ERROR	((u32)-1 & ~VFP_NAN_FLAG)
+
+/*
+ * A flag to tell vfp instruction type.
+ *  OP_SCALAR - this operation always operates in scalar mode
+ *  OP_SD - the instruction exceptionally writes to a single precision result.
+ *  OP_DD - the instruction exceptionally writes to a double precision result.
+ *  OP_SM - the instruction exceptionally reads from a single precision operand.
+ */
+#define OP_SCALAR	(1 << 0)
+#define OP_SD		(1 << 1)
+#define OP_DD		(1 << 1)
+#define OP_SM		(1 << 2)
+
+struct op {
+	u32 (* const fn)(int dd, int dn, int dm, u32 fpscr);
+	u32 flags;
+};
+
+asmlinkage void vfp_save_state(void *location, u32 fpexc);
diff --git a/arch/arm/vfp/vfpdouble.c b/arch/arm/vfp/vfpdouble.c
new file mode 100644
index 000000000..423f56dd4
--- /dev/null
+++ b/arch/arm/vfp/vfpdouble.c
@@ -0,0 +1,1206 @@
+/*
+ *  linux/arch/arm/vfp/vfpdouble.c
+ *
+ * This code is derived in part from John R. Housers softfloat library, which
+ * carries the following notice:
+ *
+ * ===========================================================================
+ * This C source file is part of the SoftFloat IEC/IEEE Floating-point
+ * Arithmetic Package, Release 2.
+ *
+ * Written by John R. Hauser.  This work was made possible in part by the
+ * International Computer Science Institute, located at Suite 600, 1947 Center
+ * Street, Berkeley, California 94704.  Funding was partially provided by the
+ * National Science Foundation under grant MIP-9311980.  The original version
+ * of this code was written as part of a project to build a fixed-point vector
+ * processor in collaboration with the University of California at Berkeley,
+ * overseen by Profs. Nelson Morgan and John Wawrzynek.  More information
+ * is available through the web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
+ * arithmetic/softfloat.html'.
+ *
+ * THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort
+ * has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
+ * TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO
+ * PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
+ * AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
+ *
+ * Derivative works are acceptable, even for commercial purposes, so long as
+ * (1) they include prominent notice that the work is derivative, and (2) they
+ * include prominent notice akin to these three paragraphs for those parts of
+ * this code that are retained.
+ * ===========================================================================
+ */
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+
+#include <asm/div64.h>
+#include <asm/vfp.h>
+
+#include "vfpinstr.h"
+#include "vfp.h"
+
+static struct vfp_double vfp_double_default_qnan = {
+	.exponent	= 2047,
+	.sign		= 0,
+	.significand	= VFP_DOUBLE_SIGNIFICAND_QNAN,
+};
+
+static void vfp_double_dump(const char *str, struct vfp_double *d)
+{
+	pr_debug("VFP: %s: sign=%d exponent=%d significand=%016llx\n",
+		 str, d->sign != 0, d->exponent, d->significand);
+}
+
+static void vfp_double_normalise_denormal(struct vfp_double *vd)
+{
+	int bits = 31 - fls(vd->significand >> 32);
+	if (bits == 31)
+		bits = 63 - fls(vd->significand);
+
+	vfp_double_dump("normalise_denormal: in", vd);
+
+	if (bits) {
+		vd->exponent -= bits - 1;
+		vd->significand <<= bits;
+	}
+
+	vfp_double_dump("normalise_denormal: out", vd);
+}
+
+u32 vfp_double_normaliseround(int dd, struct vfp_double *vd, u32 fpscr, u32 exceptions, const char *func)
+{
+	u64 significand, incr;
+	int exponent, shift, underflow;
+	u32 rmode;
+
+	vfp_double_dump("pack: in", vd);
+
+	/*
+	 * Infinities and NaNs are a special case.
+	 */
+	if (vd->exponent == 2047 && (vd->significand == 0 || exceptions))
+		goto pack;
+
+	/*
+	 * Special-case zero.
+	 */
+	if (vd->significand == 0) {
+		vd->exponent = 0;
+		goto pack;
+	}
+
+	exponent = vd->exponent;
+	significand = vd->significand;
+
+	shift = 32 - fls(significand >> 32);
+	if (shift == 32)
+		shift = 64 - fls(significand);
+	if (shift) {
+		exponent -= shift;
+		significand <<= shift;
+	}
+
+#ifdef DEBUG
+	vd->exponent = exponent;
+	vd->significand = significand;
+	vfp_double_dump("pack: normalised", vd);
+#endif
+
+	/*
+	 * Tiny number?
+	 */
+	underflow = exponent < 0;
+	if (underflow) {
+		significand = vfp_shiftright64jamming(significand, -exponent);
+		exponent = 0;
+#ifdef DEBUG
+		vd->exponent = exponent;
+		vd->significand = significand;
+		vfp_double_dump("pack: tiny number", vd);
+#endif
+		if (!(significand & ((1ULL << (VFP_DOUBLE_LOW_BITS + 1)) - 1)))
+			underflow = 0;
+	}
+
+	/*
+	 * Select rounding increment.
+	 */
+	incr = 0;
+	rmode = fpscr & FPSCR_RMODE_MASK;
+
+	if (rmode == FPSCR_ROUND_NEAREST) {
+		incr = 1ULL << VFP_DOUBLE_LOW_BITS;
+		if ((significand & (1ULL << (VFP_DOUBLE_LOW_BITS + 1))) == 0)
+			incr -= 1;
+	} else if (rmode == FPSCR_ROUND_TOZERO) {
+		incr = 0;
+	} else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vd->sign != 0))
+		incr = (1ULL << (VFP_DOUBLE_LOW_BITS + 1)) - 1;
+
+	pr_debug("VFP: rounding increment = 0x%08llx\n", incr);
+
+	/*
+	 * Is our rounding going to overflow?
+	 */
+	if ((significand + incr) < significand) {
+		exponent += 1;
+		significand = (significand >> 1) | (significand & 1);
+		incr >>= 1;
+#ifdef DEBUG
+		vd->exponent = exponent;
+		vd->significand = significand;
+		vfp_double_dump("pack: overflow", vd);
+#endif
+	}
+
+	/*
+	 * If any of the low bits (which will be shifted out of the
+	 * number) are non-zero, the result is inexact.
+	 */
+	if (significand & ((1 << (VFP_DOUBLE_LOW_BITS + 1)) - 1))
+		exceptions |= FPSCR_IXC;
+
+	/*
+	 * Do our rounding.
+	 */
+	significand += incr;
+
+	/*
+	 * Infinity?
+	 */
+	if (exponent >= 2046) {
+		exceptions |= FPSCR_OFC | FPSCR_IXC;
+		if (incr == 0) {
+			vd->exponent = 2045;
+			vd->significand = 0x7fffffffffffffffULL;
+		} else {
+			vd->exponent = 2047;		/* infinity */
+			vd->significand = 0;
+		}
+	} else {
+		if (significand >> (VFP_DOUBLE_LOW_BITS + 1) == 0)
+			exponent = 0;
+		if (exponent || significand > 0x8000000000000000ULL)
+			underflow = 0;
+		if (underflow)
+			exceptions |= FPSCR_UFC;
+		vd->exponent = exponent;
+		vd->significand = significand >> 1;
+	}
+
+ pack:
+	vfp_double_dump("pack: final", vd);
+	{
+		s64 d = vfp_double_pack(vd);
+		pr_debug("VFP: %s: d(d%d)=%016llx exceptions=%08x\n", func,
+			 dd, d, exceptions);
+		vfp_put_double(d, dd);
+	}
+	return exceptions;
+}
+
+/*
+ * Propagate the NaN, setting exceptions if it is signalling.
+ * 'n' is always a NaN.  'm' may be a number, NaN or infinity.
+ */
+static u32
+vfp_propagate_nan(struct vfp_double *vdd, struct vfp_double *vdn,
+		  struct vfp_double *vdm, u32 fpscr)
+{
+	struct vfp_double *nan;
+	int tn, tm = 0;
+
+	tn = vfp_double_type(vdn);
+
+	if (vdm)
+		tm = vfp_double_type(vdm);
+
+	if (fpscr & FPSCR_DEFAULT_NAN)
+		/*
+		 * Default NaN mode - always returns a quiet NaN
+		 */
+		nan = &vfp_double_default_qnan;
+	else {
+		/*
+		 * Contemporary mode - select the first signalling
+		 * NAN, or if neither are signalling, the first
+		 * quiet NAN.
+		 */
+		if (tn == VFP_SNAN || (tm != VFP_SNAN && tn == VFP_QNAN))
+			nan = vdn;
+		else
+			nan = vdm;
+		/*
+		 * Make the NaN quiet.
+		 */
+		nan->significand |= VFP_DOUBLE_SIGNIFICAND_QNAN;
+	}
+
+	*vdd = *nan;
+
+	/*
+	 * If one was a signalling NAN, raise invalid operation.
+	 */
+	return tn == VFP_SNAN || tm == VFP_SNAN ? FPSCR_IOC : VFP_NAN_FLAG;
+}
+
+/*
+ * Extended operations
+ */
+static u32 vfp_double_fabs(int dd, int unused, int dm, u32 fpscr)
+{
+	vfp_put_double(vfp_double_packed_abs(vfp_get_double(dm)), dd);
+	return 0;
+}
+
+static u32 vfp_double_fcpy(int dd, int unused, int dm, u32 fpscr)
+{
+	vfp_put_double(vfp_get_double(dm), dd);
+	return 0;
+}
+
+static u32 vfp_double_fneg(int dd, int unused, int dm, u32 fpscr)
+{
+	vfp_put_double(vfp_double_packed_negate(vfp_get_double(dm)), dd);
+	return 0;
+}
+
+static u32 vfp_double_fsqrt(int dd, int unused, int dm, u32 fpscr)
+{
+	struct vfp_double vdm, vdd;
+	int ret, tm;
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+	tm = vfp_double_type(&vdm);
+	if (tm & (VFP_NAN|VFP_INFINITY)) {
+		struct vfp_double *vdp = &vdd;
+
+		if (tm & VFP_NAN)
+			ret = vfp_propagate_nan(vdp, &vdm, NULL, fpscr);
+		else if (vdm.sign == 0) {
+ sqrt_copy:
+			vdp = &vdm;
+			ret = 0;
+		} else {
+ sqrt_invalid:
+			vdp = &vfp_double_default_qnan;
+			ret = FPSCR_IOC;
+		}
+		vfp_put_double(vfp_double_pack(vdp), dd);
+		return ret;
+	}
+
+	/*
+	 * sqrt(+/- 0) == +/- 0
+	 */
+	if (tm & VFP_ZERO)
+		goto sqrt_copy;
+
+	/*
+	 * Normalise a denormalised number
+	 */
+	if (tm & VFP_DENORMAL)
+		vfp_double_normalise_denormal(&vdm);
+
+	/*
+	 * sqrt(<0) = invalid
+	 */
+	if (vdm.sign)
+		goto sqrt_invalid;
+
+	vfp_double_dump("sqrt", &vdm);
+
+	/*
+	 * Estimate the square root.
+	 */
+	vdd.sign = 0;
+	vdd.exponent = ((vdm.exponent - 1023) >> 1) + 1023;
+	vdd.significand = (u64)vfp_estimate_sqrt_significand(vdm.exponent, vdm.significand >> 32) << 31;
+
+	vfp_double_dump("sqrt estimate1", &vdd);
+
+	vdm.significand >>= 1 + (vdm.exponent & 1);
+	vdd.significand += 2 + vfp_estimate_div128to64(vdm.significand, 0, vdd.significand);
+
+	vfp_double_dump("sqrt estimate2", &vdd);
+
+	/*
+	 * And now adjust.
+	 */
+	if ((vdd.significand & VFP_DOUBLE_LOW_BITS_MASK) <= 5) {
+		if (vdd.significand < 2) {
+			vdd.significand = ~0ULL;
+		} else {
+			u64 termh, terml, remh, reml;
+			vdm.significand <<= 2;
+			mul64to128(&termh, &terml, vdd.significand, vdd.significand);
+			sub128(&remh, &reml, vdm.significand, 0, termh, terml);
+			while ((s64)remh < 0) {
+				vdd.significand -= 1;
+				shift64left(&termh, &terml, vdd.significand);
+				terml |= 1;
+				add128(&remh, &reml, remh, reml, termh, terml);
+			}
+			vdd.significand |= (remh | reml) != 0;
+		}
+	}
+	vdd.significand = vfp_shiftright64jamming(vdd.significand, 1);
+
+	return vfp_double_normaliseround(dd, &vdd, fpscr, 0, "fsqrt");
+}
+
+/*
+ * Equal	:= ZC
+ * Less than	:= N
+ * Greater than	:= C
+ * Unordered	:= CV
+ */
+static u32 vfp_compare(int dd, int signal_on_qnan, int dm, u32 fpscr)
+{
+	s64 d, m;
+	u32 ret = 0;
+
+	m = vfp_get_double(dm);
+	if (vfp_double_packed_exponent(m) == 2047 && vfp_double_packed_mantissa(m)) {
+		ret |= FPSCR_C | FPSCR_V;
+		if (signal_on_qnan || !(vfp_double_packed_mantissa(m) & (1ULL << (VFP_DOUBLE_MANTISSA_BITS - 1))))
+			/*
+			 * Signalling NaN, or signalling on quiet NaN
+			 */
+			ret |= FPSCR_IOC;
+	}
+
+	d = vfp_get_double(dd);
+	if (vfp_double_packed_exponent(d) == 2047 && vfp_double_packed_mantissa(d)) {
+		ret |= FPSCR_C | FPSCR_V;
+		if (signal_on_qnan || !(vfp_double_packed_mantissa(d) & (1ULL << (VFP_DOUBLE_MANTISSA_BITS - 1))))
+			/*
+			 * Signalling NaN, or signalling on quiet NaN
+			 */
+			ret |= FPSCR_IOC;
+	}
+
+	if (ret == 0) {
+		if (d == m || vfp_double_packed_abs(d | m) == 0) {
+			/*
+			 * equal
+			 */
+			ret |= FPSCR_Z | FPSCR_C;
+		} else if (vfp_double_packed_sign(d ^ m)) {
+			/*
+			 * different signs
+			 */
+			if (vfp_double_packed_sign(d))
+				/*
+				 * d is negative, so d < m
+				 */
+				ret |= FPSCR_N;
+			else
+				/*
+				 * d is positive, so d > m
+				 */
+				ret |= FPSCR_C;
+		} else if ((vfp_double_packed_sign(d) != 0) ^ (d < m)) {
+			/*
+			 * d < m
+			 */
+			ret |= FPSCR_N;
+		} else if ((vfp_double_packed_sign(d) != 0) ^ (d > m)) {
+			/*
+			 * d > m
+			 */
+			ret |= FPSCR_C;
+		}
+	}
+
+	return ret;
+}
+
+static u32 vfp_double_fcmp(int dd, int unused, int dm, u32 fpscr)
+{
+	return vfp_compare(dd, 0, dm, fpscr);
+}
+
+static u32 vfp_double_fcmpe(int dd, int unused, int dm, u32 fpscr)
+{
+	return vfp_compare(dd, 1, dm, fpscr);
+}
+
+static u32 vfp_double_fcmpz(int dd, int unused, int dm, u32 fpscr)
+{
+	return vfp_compare(dd, 0, VFP_REG_ZERO, fpscr);
+}
+
+static u32 vfp_double_fcmpez(int dd, int unused, int dm, u32 fpscr)
+{
+	return vfp_compare(dd, 1, VFP_REG_ZERO, fpscr);
+}
+
+static u32 vfp_double_fcvts(int sd, int unused, int dm, u32 fpscr)
+{
+	struct vfp_double vdm;
+	struct vfp_single vsd;
+	int tm;
+	u32 exceptions = 0;
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+
+	tm = vfp_double_type(&vdm);
+
+	/*
+	 * If we have a signalling NaN, signal invalid operation.
+	 */
+	if (tm == VFP_SNAN)
+		exceptions = FPSCR_IOC;
+
+	if (tm & VFP_DENORMAL)
+		vfp_double_normalise_denormal(&vdm);
+
+	vsd.sign = vdm.sign;
+	vsd.significand = vfp_hi64to32jamming(vdm.significand);
+
+	/*
+	 * If we have an infinity or a NaN, the exponent must be 255
+	 */
+	if (tm & (VFP_INFINITY|VFP_NAN)) {
+		vsd.exponent = 255;
+		if (tm == VFP_QNAN)
+			vsd.significand |= VFP_SINGLE_SIGNIFICAND_QNAN;
+		goto pack_nan;
+	} else if (tm & VFP_ZERO)
+		vsd.exponent = 0;
+	else
+		vsd.exponent = vdm.exponent - (1023 - 127);
+
+	return vfp_single_normaliseround(sd, &vsd, fpscr, exceptions, "fcvts");
+
+ pack_nan:
+	vfp_put_float(vfp_single_pack(&vsd), sd);
+	return exceptions;
+}
+
+static u32 vfp_double_fuito(int dd, int unused, int dm, u32 fpscr)
+{
+	struct vfp_double vdm;
+	u32 m = vfp_get_float(dm);
+
+	vdm.sign = 0;
+	vdm.exponent = 1023 + 63 - 1;
+	vdm.significand = (u64)m;
+
+	return vfp_double_normaliseround(dd, &vdm, fpscr, 0, "fuito");
+}
+
+static u32 vfp_double_fsito(int dd, int unused, int dm, u32 fpscr)
+{
+	struct vfp_double vdm;
+	u32 m = vfp_get_float(dm);
+
+	vdm.sign = (m & 0x80000000) >> 16;
+	vdm.exponent = 1023 + 63 - 1;
+	vdm.significand = vdm.sign ? -m : m;
+
+	return vfp_double_normaliseround(dd, &vdm, fpscr, 0, "fsito");
+}
+
+static u32 vfp_double_ftoui(int sd, int unused, int dm, u32 fpscr)
+{
+	struct vfp_double vdm;
+	u32 d, exceptions = 0;
+	int rmode = fpscr & FPSCR_RMODE_MASK;
+	int tm;
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+
+	/*
+	 * Do we have a denormalised number?
+	 */
+	tm = vfp_double_type(&vdm);
+	if (tm & VFP_DENORMAL)
+		exceptions |= FPSCR_IDC;
+
+	if (tm & VFP_NAN)
+		vdm.sign = 0;
+
+	if (vdm.exponent >= 1023 + 32) {
+		d = vdm.sign ? 0 : 0xffffffff;
+		exceptions = FPSCR_IOC;
+	} else if (vdm.exponent >= 1023 - 1) {
+		int shift = 1023 + 63 - vdm.exponent;
+		u64 rem, incr = 0;
+
+		/*
+		 * 2^0 <= m < 2^32-2^8
+		 */
+		d = (vdm.significand << 1) >> shift;
+		rem = vdm.significand << (65 - shift);
+
+		if (rmode == FPSCR_ROUND_NEAREST) {
+			incr = 0x8000000000000000ULL;
+			if ((d & 1) == 0)
+				incr -= 1;
+		} else if (rmode == FPSCR_ROUND_TOZERO) {
+			incr = 0;
+		} else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vdm.sign != 0)) {
+			incr = ~0ULL;
+		}
+
+		if ((rem + incr) < rem) {
+			if (d < 0xffffffff)
+				d += 1;
+			else
+				exceptions |= FPSCR_IOC;
+		}
+
+		if (d && vdm.sign) {
+			d = 0;
+			exceptions |= FPSCR_IOC;
+		} else if (rem)
+			exceptions |= FPSCR_IXC;
+	} else {
+		d = 0;
+		if (vdm.exponent | vdm.significand) {
+			exceptions |= FPSCR_IXC;
+			if (rmode == FPSCR_ROUND_PLUSINF && vdm.sign == 0)
+				d = 1;
+			else if (rmode == FPSCR_ROUND_MINUSINF && vdm.sign) {
+				d = 0;
+				exceptions |= FPSCR_IOC;
+			}
+		}
+	}
+
+	pr_debug("VFP: ftoui: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
+
+	vfp_put_float(d, sd);
+
+	return exceptions;
+}
+
+static u32 vfp_double_ftouiz(int sd, int unused, int dm, u32 fpscr)
+{
+	return vfp_double_ftoui(sd, unused, dm, FPSCR_ROUND_TOZERO);
+}
+
+static u32 vfp_double_ftosi(int sd, int unused, int dm, u32 fpscr)
+{
+	struct vfp_double vdm;
+	u32 d, exceptions = 0;
+	int rmode = fpscr & FPSCR_RMODE_MASK;
+	int tm;
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+	vfp_double_dump("VDM", &vdm);
+
+	/*
+	 * Do we have denormalised number?
+	 */
+	tm = vfp_double_type(&vdm);
+	if (tm & VFP_DENORMAL)
+		exceptions |= FPSCR_IDC;
+
+	if (tm & VFP_NAN) {
+		d = 0;
+		exceptions |= FPSCR_IOC;
+	} else if (vdm.exponent >= 1023 + 32) {
+		d = 0x7fffffff;
+		if (vdm.sign)
+			d = ~d;
+		exceptions |= FPSCR_IOC;
+	} else if (vdm.exponent >= 1023 - 1) {
+		int shift = 1023 + 63 - vdm.exponent;	/* 58 */
+		u64 rem, incr = 0;
+
+		d = (vdm.significand << 1) >> shift;
+		rem = vdm.significand << (65 - shift);
+
+		if (rmode == FPSCR_ROUND_NEAREST) {
+			incr = 0x8000000000000000ULL;
+			if ((d & 1) == 0)
+				incr -= 1;
+		} else if (rmode == FPSCR_ROUND_TOZERO) {
+			incr = 0;
+		} else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vdm.sign != 0)) {
+			incr = ~0ULL;
+		}
+
+		if ((rem + incr) < rem && d < 0xffffffff)
+			d += 1;
+		if (d > 0x7fffffff + (vdm.sign != 0)) {
+			d = 0x7fffffff + (vdm.sign != 0);
+			exceptions |= FPSCR_IOC;
+		} else if (rem)
+			exceptions |= FPSCR_IXC;
+
+		if (vdm.sign)
+			d = -d;
+	} else {
+		d = 0;
+		if (vdm.exponent | vdm.significand) {
+			exceptions |= FPSCR_IXC;
+			if (rmode == FPSCR_ROUND_PLUSINF && vdm.sign == 0)
+				d = 1;
+			else if (rmode == FPSCR_ROUND_MINUSINF && vdm.sign)
+				d = -1;
+		}
+	}
+
+	pr_debug("VFP: ftosi: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
+
+	vfp_put_float((s32)d, sd);
+
+	return exceptions;
+}
+
+static u32 vfp_double_ftosiz(int dd, int unused, int dm, u32 fpscr)
+{
+	return vfp_double_ftosi(dd, unused, dm, FPSCR_ROUND_TOZERO);
+}
+
+
+static struct op fops_ext[32] = {
+	[FEXT_TO_IDX(FEXT_FCPY)]	= { vfp_double_fcpy,   0 },
+	[FEXT_TO_IDX(FEXT_FABS)]	= { vfp_double_fabs,   0 },
+	[FEXT_TO_IDX(FEXT_FNEG)]	= { vfp_double_fneg,   0 },
+	[FEXT_TO_IDX(FEXT_FSQRT)]	= { vfp_double_fsqrt,  0 },
+	[FEXT_TO_IDX(FEXT_FCMP)]	= { vfp_double_fcmp,   OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCMPE)]	= { vfp_double_fcmpe,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCMPZ)]	= { vfp_double_fcmpz,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCMPEZ)]	= { vfp_double_fcmpez, OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCVT)]	= { vfp_double_fcvts,  OP_SCALAR|OP_SD },
+	[FEXT_TO_IDX(FEXT_FUITO)]	= { vfp_double_fuito,  OP_SCALAR|OP_SM },
+	[FEXT_TO_IDX(FEXT_FSITO)]	= { vfp_double_fsito,  OP_SCALAR|OP_SM },
+	[FEXT_TO_IDX(FEXT_FTOUI)]	= { vfp_double_ftoui,  OP_SCALAR|OP_SD },
+	[FEXT_TO_IDX(FEXT_FTOUIZ)]	= { vfp_double_ftouiz, OP_SCALAR|OP_SD },
+	[FEXT_TO_IDX(FEXT_FTOSI)]	= { vfp_double_ftosi,  OP_SCALAR|OP_SD },
+	[FEXT_TO_IDX(FEXT_FTOSIZ)]	= { vfp_double_ftosiz, OP_SCALAR|OP_SD },
+};
+
+
+
+
+static u32
+vfp_double_fadd_nonnumber(struct vfp_double *vdd, struct vfp_double *vdn,
+			  struct vfp_double *vdm, u32 fpscr)
+{
+	struct vfp_double *vdp;
+	u32 exceptions = 0;
+	int tn, tm;
+
+	tn = vfp_double_type(vdn);
+	tm = vfp_double_type(vdm);
+
+	if (tn & tm & VFP_INFINITY) {
+		/*
+		 * Two infinities.  Are they different signs?
+		 */
+		if (vdn->sign ^ vdm->sign) {
+			/*
+			 * different signs -> invalid
+			 */
+			exceptions = FPSCR_IOC;
+			vdp = &vfp_double_default_qnan;
+		} else {
+			/*
+			 * same signs -> valid
+			 */
+			vdp = vdn;
+		}
+	} else if (tn & VFP_INFINITY && tm & VFP_NUMBER) {
+		/*
+		 * One infinity and one number -> infinity
+		 */
+		vdp = vdn;
+	} else {
+		/*
+		 * 'n' is a NaN of some type
+		 */
+		return vfp_propagate_nan(vdd, vdn, vdm, fpscr);
+	}
+	*vdd = *vdp;
+	return exceptions;
+}
+
+static u32
+vfp_double_add(struct vfp_double *vdd, struct vfp_double *vdn,
+	       struct vfp_double *vdm, u32 fpscr)
+{
+	u32 exp_diff;
+	u64 m_sig;
+
+	if (vdn->significand & (1ULL << 63) ||
+	    vdm->significand & (1ULL << 63)) {
+		pr_info("VFP: bad FP values in %s\n", __func__);
+		vfp_double_dump("VDN", vdn);
+		vfp_double_dump("VDM", vdm);
+	}
+
+	/*
+	 * Ensure that 'n' is the largest magnitude number.  Note that
+	 * if 'n' and 'm' have equal exponents, we do not swap them.
+	 * This ensures that NaN propagation works correctly.
+	 */
+	if (vdn->exponent < vdm->exponent) {
+		struct vfp_double *t = vdn;
+		vdn = vdm;
+		vdm = t;
+	}
+
+	/*
+	 * Is 'n' an infinity or a NaN?  Note that 'm' may be a number,
+	 * infinity or a NaN here.
+	 */
+	if (vdn->exponent == 2047)
+		return vfp_double_fadd_nonnumber(vdd, vdn, vdm, fpscr);
+
+	/*
+	 * We have two proper numbers, where 'vdn' is the larger magnitude.
+	 *
+	 * Copy 'n' to 'd' before doing the arithmetic.
+	 */
+	*vdd = *vdn;
+
+	/*
+	 * Align 'm' with the result.
+	 */
+	exp_diff = vdn->exponent - vdm->exponent;
+	m_sig = vfp_shiftright64jamming(vdm->significand, exp_diff);
+
+	/*
+	 * If the signs are different, we are really subtracting.
+	 */
+	if (vdn->sign ^ vdm->sign) {
+		m_sig = vdn->significand - m_sig;
+		if ((s64)m_sig < 0) {
+			vdd->sign = vfp_sign_negate(vdd->sign);
+			m_sig = -m_sig;
+		} else if (m_sig == 0) {
+			vdd->sign = (fpscr & FPSCR_RMODE_MASK) ==
+				      FPSCR_ROUND_MINUSINF ? 0x8000 : 0;
+		}
+	} else {
+		m_sig += vdn->significand;
+	}
+	vdd->significand = m_sig;
+
+	return 0;
+}
+
+static u32
+vfp_double_multiply(struct vfp_double *vdd, struct vfp_double *vdn,
+		    struct vfp_double *vdm, u32 fpscr)
+{
+	vfp_double_dump("VDN", vdn);
+	vfp_double_dump("VDM", vdm);
+
+	/*
+	 * Ensure that 'n' is the largest magnitude number.  Note that
+	 * if 'n' and 'm' have equal exponents, we do not swap them.
+	 * This ensures that NaN propagation works correctly.
+	 */
+	if (vdn->exponent < vdm->exponent) {
+		struct vfp_double *t = vdn;
+		vdn = vdm;
+		vdm = t;
+		pr_debug("VFP: swapping M <-> N\n");
+	}
+
+	vdd->sign = vdn->sign ^ vdm->sign;
+
+	/*
+	 * If 'n' is an infinity or NaN, handle it.  'm' may be anything.
+	 */
+	if (vdn->exponent == 2047) {
+		if (vdn->significand || (vdm->exponent == 2047 && vdm->significand))
+			return vfp_propagate_nan(vdd, vdn, vdm, fpscr);
+		if ((vdm->exponent | vdm->significand) == 0) {
+			*vdd = vfp_double_default_qnan;
+			return FPSCR_IOC;
+		}
+		vdd->exponent = vdn->exponent;
+		vdd->significand = 0;
+		return 0;
+	}
+
+	/*
+	 * If 'm' is zero, the result is always zero.  In this case,
+	 * 'n' may be zero or a number, but it doesn't matter which.
+	 */
+	if ((vdm->exponent | vdm->significand) == 0) {
+		vdd->exponent = 0;
+		vdd->significand = 0;
+		return 0;
+	}
+
+	/*
+	 * We add 2 to the destination exponent for the same reason
+	 * as the addition case - though this time we have +1 from
+	 * each input operand.
+	 */
+	vdd->exponent = vdn->exponent + vdm->exponent - 1023 + 2;
+	vdd->significand = vfp_hi64multiply64(vdn->significand, vdm->significand);
+
+	vfp_double_dump("VDD", vdd);
+	return 0;
+}
+
+#define NEG_MULTIPLY	(1 << 0)
+#define NEG_SUBTRACT	(1 << 1)
+
+static u32
+vfp_double_multiply_accumulate(int dd, int dn, int dm, u32 fpscr, u32 negate, char *func)
+{
+	struct vfp_double vdd, vdp, vdn, vdm;
+	u32 exceptions;
+
+	vfp_double_unpack(&vdn, vfp_get_double(dn));
+	if (vdn.exponent == 0 && vdn.significand)
+		vfp_double_normalise_denormal(&vdn);
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+	if (vdm.exponent == 0 && vdm.significand)
+		vfp_double_normalise_denormal(&vdm);
+
+	exceptions = vfp_double_multiply(&vdp, &vdn, &vdm, fpscr);
+	if (negate & NEG_MULTIPLY)
+		vdp.sign = vfp_sign_negate(vdp.sign);
+
+	vfp_double_unpack(&vdn, vfp_get_double(dd));
+	if (vdn.exponent == 0 && vdn.significand)
+		vfp_double_normalise_denormal(&vdn);
+	if (negate & NEG_SUBTRACT)
+		vdn.sign = vfp_sign_negate(vdn.sign);
+
+	exceptions |= vfp_double_add(&vdd, &vdn, &vdp, fpscr);
+
+	return vfp_double_normaliseround(dd, &vdd, fpscr, exceptions, func);
+}
+
+/*
+ * Standard operations
+ */
+
+/*
+ * sd = sd + (sn * sm)
+ */
+static u32 vfp_double_fmac(int dd, int dn, int dm, u32 fpscr)
+{
+	return vfp_double_multiply_accumulate(dd, dn, dm, fpscr, 0, "fmac");
+}
+
+/*
+ * sd = sd - (sn * sm)
+ */
+static u32 vfp_double_fnmac(int dd, int dn, int dm, u32 fpscr)
+{
+	return vfp_double_multiply_accumulate(dd, dn, dm, fpscr, NEG_MULTIPLY, "fnmac");
+}
+
+/*
+ * sd = -sd + (sn * sm)
+ */
+static u32 vfp_double_fmsc(int dd, int dn, int dm, u32 fpscr)
+{
+	return vfp_double_multiply_accumulate(dd, dn, dm, fpscr, NEG_SUBTRACT, "fmsc");
+}
+
+/*
+ * sd = -sd - (sn * sm)
+ */
+static u32 vfp_double_fnmsc(int dd, int dn, int dm, u32 fpscr)
+{
+	return vfp_double_multiply_accumulate(dd, dn, dm, fpscr, NEG_SUBTRACT | NEG_MULTIPLY, "fnmsc");
+}
+
+/*
+ * sd = sn * sm
+ */
+static u32 vfp_double_fmul(int dd, int dn, int dm, u32 fpscr)
+{
+	struct vfp_double vdd, vdn, vdm;
+	u32 exceptions;
+
+	vfp_double_unpack(&vdn, vfp_get_double(dn));
+	if (vdn.exponent == 0 && vdn.significand)
+		vfp_double_normalise_denormal(&vdn);
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+	if (vdm.exponent == 0 && vdm.significand)
+		vfp_double_normalise_denormal(&vdm);
+
+	exceptions = vfp_double_multiply(&vdd, &vdn, &vdm, fpscr);
+	return vfp_double_normaliseround(dd, &vdd, fpscr, exceptions, "fmul");
+}
+
+/*
+ * sd = -(sn * sm)
+ */
+static u32 vfp_double_fnmul(int dd, int dn, int dm, u32 fpscr)
+{
+	struct vfp_double vdd, vdn, vdm;
+	u32 exceptions;
+
+	vfp_double_unpack(&vdn, vfp_get_double(dn));
+	if (vdn.exponent == 0 && vdn.significand)
+		vfp_double_normalise_denormal(&vdn);
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+	if (vdm.exponent == 0 && vdm.significand)
+		vfp_double_normalise_denormal(&vdm);
+
+	exceptions = vfp_double_multiply(&vdd, &vdn, &vdm, fpscr);
+	vdd.sign = vfp_sign_negate(vdd.sign);
+
+	return vfp_double_normaliseround(dd, &vdd, fpscr, exceptions, "fnmul");
+}
+
+/*
+ * sd = sn + sm
+ */
+static u32 vfp_double_fadd(int dd, int dn, int dm, u32 fpscr)
+{
+	struct vfp_double vdd, vdn, vdm;
+	u32 exceptions;
+
+	vfp_double_unpack(&vdn, vfp_get_double(dn));
+	if (vdn.exponent == 0 && vdn.significand)
+		vfp_double_normalise_denormal(&vdn);
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+	if (vdm.exponent == 0 && vdm.significand)
+		vfp_double_normalise_denormal(&vdm);
+
+	exceptions = vfp_double_add(&vdd, &vdn, &vdm, fpscr);
+
+	return vfp_double_normaliseround(dd, &vdd, fpscr, exceptions, "fadd");
+}
+
+/*
+ * sd = sn - sm
+ */
+static u32 vfp_double_fsub(int dd, int dn, int dm, u32 fpscr)
+{
+	struct vfp_double vdd, vdn, vdm;
+	u32 exceptions;
+
+	vfp_double_unpack(&vdn, vfp_get_double(dn));
+	if (vdn.exponent == 0 && vdn.significand)
+		vfp_double_normalise_denormal(&vdn);
+
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+	if (vdm.exponent == 0 && vdm.significand)
+		vfp_double_normalise_denormal(&vdm);
+
+	/*
+	 * Subtraction is like addition, but with a negated operand.
+	 */
+	vdm.sign = vfp_sign_negate(vdm.sign);
+
+	exceptions = vfp_double_add(&vdd, &vdn, &vdm, fpscr);
+
+	return vfp_double_normaliseround(dd, &vdd, fpscr, exceptions, "fsub");
+}
+
+/*
+ * sd = sn / sm
+ */
+static u32 vfp_double_fdiv(int dd, int dn, int dm, u32 fpscr)
+{
+	struct vfp_double vdd, vdn, vdm;
+	u32 exceptions = 0;
+	int tm, tn;
+
+	vfp_double_unpack(&vdn, vfp_get_double(dn));
+	vfp_double_unpack(&vdm, vfp_get_double(dm));
+
+	vdd.sign = vdn.sign ^ vdm.sign;
+
+	tn = vfp_double_type(&vdn);
+	tm = vfp_double_type(&vdm);
+
+	/*
+	 * Is n a NAN?
+	 */
+	if (tn & VFP_NAN)
+		goto vdn_nan;
+
+	/*
+	 * Is m a NAN?
+	 */
+	if (tm & VFP_NAN)
+		goto vdm_nan;
+
+	/*
+	 * If n and m are infinity, the result is invalid
+	 * If n and m are zero, the result is invalid
+	 */
+	if (tm & tn & (VFP_INFINITY|VFP_ZERO))
+		goto invalid;
+
+	/*
+	 * If n is infinity, the result is infinity
+	 */
+	if (tn & VFP_INFINITY)
+		goto infinity;
+
+	/*
+	 * If m is zero, raise div0 exceptions
+	 */
+	if (tm & VFP_ZERO)
+		goto divzero;
+
+	/*
+	 * If m is infinity, or n is zero, the result is zero
+	 */
+	if (tm & VFP_INFINITY || tn & VFP_ZERO)
+		goto zero;
+
+	if (tn & VFP_DENORMAL)
+		vfp_double_normalise_denormal(&vdn);
+	if (tm & VFP_DENORMAL)
+		vfp_double_normalise_denormal(&vdm);
+
+	/*
+	 * Ok, we have two numbers, we can perform division.
+	 */
+	vdd.exponent = vdn.exponent - vdm.exponent + 1023 - 1;
+	vdm.significand <<= 1;
+	if (vdm.significand <= (2 * vdn.significand)) {
+		vdn.significand >>= 1;
+		vdd.exponent++;
+	}
+	vdd.significand = vfp_estimate_div128to64(vdn.significand, 0, vdm.significand);
+	if ((vdd.significand & 0x1ff) <= 2) {
+		u64 termh, terml, remh, reml;
+		mul64to128(&termh, &terml, vdm.significand, vdd.significand);
+		sub128(&remh, &reml, vdn.significand, 0, termh, terml);
+		while ((s64)remh < 0) {
+			vdd.significand -= 1;
+			add128(&remh, &reml, remh, reml, 0, vdm.significand);
+		}
+		vdd.significand |= (reml != 0);
+	}
+	return vfp_double_normaliseround(dd, &vdd, fpscr, 0, "fdiv");
+
+ vdn_nan:
+	exceptions = vfp_propagate_nan(&vdd, &vdn, &vdm, fpscr);
+ pack:
+	vfp_put_double(vfp_double_pack(&vdd), dd);
+	return exceptions;
+
+ vdm_nan:
+	exceptions = vfp_propagate_nan(&vdd, &vdm, &vdn, fpscr);
+	goto pack;
+
+ zero:
+	vdd.exponent = 0;
+	vdd.significand = 0;
+	goto pack;
+
+ divzero:
+	exceptions = FPSCR_DZC;
+ infinity:
+	vdd.exponent = 2047;
+	vdd.significand = 0;
+	goto pack;
+
+ invalid:
+	vfp_put_double(vfp_double_pack(&vfp_double_default_qnan), dd);
+	return FPSCR_IOC;
+}
+
+static struct op fops[16] = {
+	[FOP_TO_IDX(FOP_FMAC)]	= { vfp_double_fmac,  0 },
+	[FOP_TO_IDX(FOP_FNMAC)]	= { vfp_double_fnmac, 0 },
+	[FOP_TO_IDX(FOP_FMSC)]	= { vfp_double_fmsc,  0 },
+	[FOP_TO_IDX(FOP_FNMSC)]	= { vfp_double_fnmsc, 0 },
+	[FOP_TO_IDX(FOP_FMUL)]	= { vfp_double_fmul,  0 },
+	[FOP_TO_IDX(FOP_FNMUL)]	= { vfp_double_fnmul, 0 },
+	[FOP_TO_IDX(FOP_FADD)]	= { vfp_double_fadd,  0 },
+	[FOP_TO_IDX(FOP_FSUB)]	= { vfp_double_fsub,  0 },
+	[FOP_TO_IDX(FOP_FDIV)]	= { vfp_double_fdiv,  0 },
+};
+
+#define FREG_BANK(x)	((x) & 0x0c)
+#define FREG_IDX(x)	((x) & 3)
+
+u32 vfp_double_cpdo(u32 inst, u32 fpscr)
+{
+	u32 op = inst & FOP_MASK;
+	u32 exceptions = 0;
+	unsigned int dest;
+	unsigned int dn = vfp_get_dn(inst);
+	unsigned int dm;
+	unsigned int vecitr, veclen, vecstride;
+	struct op *fop;
+
+	vecstride = (1 + ((fpscr & FPSCR_STRIDE_MASK) == FPSCR_STRIDE_MASK));
+
+	fop = (op == FOP_EXT) ? &fops_ext[FEXT_TO_IDX(inst)] : &fops[FOP_TO_IDX(op)];
+
+	/*
+	 * fcvtds takes an sN register number as destination, not dN.
+	 * It also always operates on scalars.
+	 */
+	if (fop->flags & OP_SD)
+		dest = vfp_get_sd(inst);
+	else
+		dest = vfp_get_dd(inst);
+
+	/*
+	 * f[us]ito takes a sN operand, not a dN operand.
+	 */
+	if (fop->flags & OP_SM)
+		dm = vfp_get_sm(inst);
+	else
+		dm = vfp_get_dm(inst);
+
+	/*
+	 * If destination bank is zero, vector length is always '1'.
+	 * ARM DDI0100F C5.1.3, C5.3.2.
+	 */
+	if ((fop->flags & OP_SCALAR) || (FREG_BANK(dest) == 0))
+		veclen = 0;
+	else
+		veclen = fpscr & FPSCR_LENGTH_MASK;
+
+	pr_debug("VFP: vecstride=%u veclen=%u\n", vecstride,
+		 (veclen >> FPSCR_LENGTH_BIT) + 1);
+
+	if (!fop->fn)
+		goto invalid;
+
+	for (vecitr = 0; vecitr <= veclen; vecitr += 1 << FPSCR_LENGTH_BIT) {
+		u32 except;
+		char type;
+
+		type = fop->flags & OP_SD ? 's' : 'd';
+		if (op == FOP_EXT)
+			pr_debug("VFP: itr%d (%c%u) = op[%u] (d%u)\n",
+				 vecitr >> FPSCR_LENGTH_BIT,
+				 type, dest, dn, dm);
+		else
+			pr_debug("VFP: itr%d (%c%u) = (d%u) op[%u] (d%u)\n",
+				 vecitr >> FPSCR_LENGTH_BIT,
+				 type, dest, dn, FOP_TO_IDX(op), dm);
+
+		except = fop->fn(dest, dn, dm, fpscr);
+		pr_debug("VFP: itr%d: exceptions=%08x\n",
+			 vecitr >> FPSCR_LENGTH_BIT, except);
+
+		exceptions |= except;
+
+		/*
+		 * CHECK: It appears to be undefined whether we stop when
+		 * we encounter an exception.  We continue.
+		 */
+		dest = FREG_BANK(dest) + ((FREG_IDX(dest) + vecstride) & 3);
+		dn = FREG_BANK(dn) + ((FREG_IDX(dn) + vecstride) & 3);
+		if (FREG_BANK(dm) != 0)
+			dm = FREG_BANK(dm) + ((FREG_IDX(dm) + vecstride) & 3);
+	}
+	return exceptions;
+
+ invalid:
+	return ~0;
+}
diff --git a/arch/arm/vfp/vfphw.S b/arch/arm/vfp/vfphw.S
new file mode 100644
index 000000000..d5837bf05
--- /dev/null
+++ b/arch/arm/vfp/vfphw.S
@@ -0,0 +1,326 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  linux/arch/arm/vfp/vfphw.S
+ *
+ *  Copyright (C) 2004 ARM Limited.
+ *  Written by Deep Blue Solutions Limited.
+ *
+ * This code is called from the kernel's undefined instruction trap.
+ * r9 holds the return address for successful handling.
+ * lr holds the return address for unrecognised instructions.
+ * r10 points at the start of the private FP workspace in the thread structure
+ * sp points to a struct pt_regs (as defined in include/asm/proc/ptrace.h)
+ */
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/vfpmacros.h>
+#include <linux/kern_levels.h>
+#include <asm/assembler.h>
+#include <asm/asm-offsets.h>
+
+	.macro	DBGSTR, str
+#ifdef DEBUG
+	stmfd	sp!, {r0-r3, ip, lr}
+	ldr	r0, =1f
+	bl	printk
+	ldmfd	sp!, {r0-r3, ip, lr}
+
+	.pushsection .rodata, "a"
+1:	.ascii	KERN_DEBUG "VFP: \str\n"
+	.byte	0
+	.previous
+#endif
+	.endm
+
+	.macro  DBGSTR1, str, arg
+#ifdef DEBUG
+	stmfd	sp!, {r0-r3, ip, lr}
+	mov	r1, \arg
+	ldr	r0, =1f
+	bl	printk
+	ldmfd	sp!, {r0-r3, ip, lr}
+
+	.pushsection .rodata, "a"
+1:	.ascii	KERN_DEBUG "VFP: \str\n"
+	.byte	0
+	.previous
+#endif
+	.endm
+
+	.macro  DBGSTR3, str, arg1, arg2, arg3
+#ifdef DEBUG
+	stmfd	sp!, {r0-r3, ip, lr}
+	mov	r3, \arg3
+	mov	r2, \arg2
+	mov	r1, \arg1
+	ldr	r0, =1f
+	bl	printk
+	ldmfd	sp!, {r0-r3, ip, lr}
+
+	.pushsection .rodata, "a"
+1:	.ascii	KERN_DEBUG "VFP: \str\n"
+	.byte	0
+	.previous
+#endif
+	.endm
+
+
+@ VFP hardware support entry point.
+@
+@  r0  = instruction opcode (32-bit ARM or two 16-bit Thumb)
+@  r2  = PC value to resume execution after successful emulation
+@  r9  = normal "successful" return address
+@  r10 = vfp_state union
+@  r11 = CPU number
+@  lr  = unrecognised instruction return address
+@  IRQs enabled.
+ENTRY(vfp_support_entry)
+	DBGSTR3	"instr %08x pc %08x state %p", r0, r2, r10
+
+	.fpu	vfpv2
+	VFPFMRX	r1, FPEXC		@ Is the VFP enabled?
+	DBGSTR1	"fpexc %08x", r1
+	tst	r1, #FPEXC_EN
+	bne	look_for_VFP_exceptions	@ VFP is already enabled
+
+	DBGSTR1 "enable %x", r10
+	ldr	r3, vfp_current_hw_state_address
+	orr	r1, r1, #FPEXC_EN	@ user FPEXC has the enable bit set
+	ldr	r4, [r3, r11, lsl #2]	@ vfp_current_hw_state pointer
+	bic	r5, r1, #FPEXC_EX	@ make sure exceptions are disabled
+	cmp	r4, r10			@ this thread owns the hw context?
+#ifndef CONFIG_SMP
+	@ For UP, checking that this thread owns the hw context is
+	@ sufficient to determine that the hardware state is valid.
+	beq	vfp_hw_state_valid
+
+	@ On UP, we lazily save the VFP context.  As a different
+	@ thread wants ownership of the VFP hardware, save the old
+	@ state if there was a previous (valid) owner.
+
+	VFPFMXR	FPEXC, r5		@ enable VFP, disable any pending
+					@ exceptions, so we can get at the
+					@ rest of it
+
+	DBGSTR1	"save old state %p", r4
+	cmp	r4, #0			@ if the vfp_current_hw_state is NULL
+	beq	vfp_reload_hw		@ then the hw state needs reloading
+	VFPFSTMIA r4, r5		@ save the working registers
+	VFPFMRX	r5, FPSCR		@ current status
+#ifndef CONFIG_CPU_FEROCEON
+	tst	r1, #FPEXC_EX		@ is there additional state to save?
+	beq	1f
+	VFPFMRX	r6, FPINST		@ FPINST (only if FPEXC.EX is set)
+	tst	r1, #FPEXC_FP2V		@ is there an FPINST2 to read?
+	beq	1f
+	VFPFMRX	r8, FPINST2		@ FPINST2 if needed (and present)
+1:
+#endif
+	stmia	r4, {r1, r5, r6, r8}	@ save FPEXC, FPSCR, FPINST, FPINST2
+vfp_reload_hw:
+
+#else
+	@ For SMP, if this thread does not own the hw context, then we
+	@ need to reload it.  No need to save the old state as on SMP,
+	@ we always save the state when we switch away from a thread.
+	bne	vfp_reload_hw
+
+	@ This thread has ownership of the current hardware context.
+	@ However, it may have been migrated to another CPU, in which
+	@ case the saved state is newer than the hardware context.
+	@ Check this by looking at the CPU number which the state was
+	@ last loaded onto.
+	ldr	ip, [r10, #VFP_CPU]
+	teq	ip, r11
+	beq	vfp_hw_state_valid
+
+vfp_reload_hw:
+	@ We're loading this threads state into the VFP hardware. Update
+	@ the CPU number which contains the most up to date VFP context.
+	str	r11, [r10, #VFP_CPU]
+
+	VFPFMXR	FPEXC, r5		@ enable VFP, disable any pending
+					@ exceptions, so we can get at the
+					@ rest of it
+#endif
+
+	DBGSTR1	"load state %p", r10
+	str	r10, [r3, r11, lsl #2]	@ update the vfp_current_hw_state pointer
+					@ Load the saved state back into the VFP
+	VFPFLDMIA r10, r5		@ reload the working registers while
+					@ FPEXC is in a safe state
+	ldmia	r10, {r1, r5, r6, r8}	@ load FPEXC, FPSCR, FPINST, FPINST2
+#ifndef CONFIG_CPU_FEROCEON
+	tst	r1, #FPEXC_EX		@ is there additional state to restore?
+	beq	1f
+	VFPFMXR	FPINST, r6		@ restore FPINST (only if FPEXC.EX is set)
+	tst	r1, #FPEXC_FP2V		@ is there an FPINST2 to write?
+	beq	1f
+	VFPFMXR	FPINST2, r8		@ FPINST2 if needed (and present)
+1:
+#endif
+	VFPFMXR	FPSCR, r5		@ restore status
+
+@ The context stored in the VFP hardware is up to date with this thread
+vfp_hw_state_valid:
+	tst	r1, #FPEXC_EX
+	bne	process_exception	@ might as well handle the pending
+					@ exception before retrying branch
+					@ out before setting an FPEXC that
+					@ stops us reading stuff
+	VFPFMXR	FPEXC, r1		@ Restore FPEXC last
+	sub	r2, r2, #4		@ Retry current instruction - if Thumb
+	str	r2, [sp, #S_PC]		@ mode it's two 16-bit instructions,
+					@ else it's one 32-bit instruction, so
+					@ always subtract 4 from the following
+					@ instruction address.
+	dec_preempt_count_ti r10, r4
+	ret	r9			@ we think we have handled things
+
+
+look_for_VFP_exceptions:
+	@ Check for synchronous or asynchronous exception
+	tst	r1, #FPEXC_EX | FPEXC_DEX
+	bne	process_exception
+	@ On some implementations of the VFP subarch 1, setting FPSCR.IXE
+	@ causes all the CDP instructions to be bounced synchronously without
+	@ setting the FPEXC.EX bit
+	VFPFMRX	r5, FPSCR
+	tst	r5, #FPSCR_IXE
+	bne	process_exception
+
+	tst	r5, #FPSCR_LENGTH_MASK
+	beq	skip
+	orr	r1, r1, #FPEXC_DEX
+	b	process_exception
+skip:
+
+	@ Fall into hand on to next handler - appropriate coproc instr
+	@ not recognised by VFP
+
+	DBGSTR	"not VFP"
+	dec_preempt_count_ti r10, r4
+	ret	lr
+
+process_exception:
+	DBGSTR	"bounce"
+	mov	r2, sp			@ nothing stacked - regdump is at TOS
+	mov	lr, r9			@ setup for a return to the user code.
+
+	@ Now call the C code to package up the bounce to the support code
+	@   r0 holds the trigger instruction
+	@   r1 holds the FPEXC value
+	@   r2 pointer to register dump
+	b	VFP_bounce		@ we have handled this - the support
+					@ code will raise an exception if
+					@ required. If not, the user code will
+					@ retry the faulted instruction
+ENDPROC(vfp_support_entry)
+
+ENTRY(vfp_save_state)
+	@ Save the current VFP state
+	@ r0 - save location
+	@ r1 - FPEXC
+	DBGSTR1	"save VFP state %p", r0
+	VFPFSTMIA r0, r2		@ save the working registers
+	VFPFMRX	r2, FPSCR		@ current status
+	tst	r1, #FPEXC_EX		@ is there additional state to save?
+	beq	1f
+	VFPFMRX	r3, FPINST		@ FPINST (only if FPEXC.EX is set)
+	tst	r1, #FPEXC_FP2V		@ is there an FPINST2 to read?
+	beq	1f
+	VFPFMRX	r12, FPINST2		@ FPINST2 if needed (and present)
+1:
+	stmia	r0, {r1, r2, r3, r12}	@ save FPEXC, FPSCR, FPINST, FPINST2
+	ret	lr
+ENDPROC(vfp_save_state)
+
+	.align
+vfp_current_hw_state_address:
+	.word	vfp_current_hw_state
+
+	.macro	tbl_branch, base, tmp, shift
+#ifdef CONFIG_THUMB2_KERNEL
+	adr	\tmp, 1f
+	add	\tmp, \tmp, \base, lsl \shift
+	ret	\tmp
+#else
+	add	pc, pc, \base, lsl \shift
+	mov	r0, r0
+#endif
+1:
+	.endm
+
+ENTRY(vfp_get_float)
+	tbl_branch r0, r3, #3
+	.fpu	vfpv2
+	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+1:	vmov	r0, s\dr
+	ret	lr
+	.org	1b + 8
+	.endr
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	r0, s\dr
+	ret	lr
+	.org	1b + 8
+	.endr
+ENDPROC(vfp_get_float)
+
+ENTRY(vfp_put_float)
+	tbl_branch r1, r3, #3
+	.fpu	vfpv2
+	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+1:	vmov	s\dr, r0
+	ret	lr
+	.org	1b + 8
+	.endr
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	s\dr, r0
+	ret	lr
+	.org	1b + 8
+	.endr
+ENDPROC(vfp_put_float)
+
+ENTRY(vfp_get_double)
+	tbl_branch r0, r3, #3
+	.fpu	vfpv2
+	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+1:	vmov	r0, r1, d\dr
+	ret	lr
+	.org	1b + 8
+	.endr
+#ifdef CONFIG_VFPv3
+	@ d16 - d31 registers
+	.fpu	vfpv3
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	r0, r1, d\dr
+	ret	lr
+	.org	1b + 8
+	.endr
+#endif
+
+	@ virtual register 16 (or 32 if VFPv3) for compare with zero
+	mov	r0, #0
+	mov	r1, #0
+	ret	lr
+ENDPROC(vfp_get_double)
+
+ENTRY(vfp_put_double)
+	tbl_branch r2, r3, #3
+	.fpu	vfpv2
+	.irp	dr,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15
+1:	vmov	d\dr, r0, r1
+	ret	lr
+	.org	1b + 8
+	.endr
+#ifdef CONFIG_VFPv3
+	.fpu	vfpv3
+	@ d16 - d31 registers
+	.irp	dr,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
+1:	vmov	d\dr, r0, r1
+	ret	lr
+	.org	1b + 8
+	.endr
+#endif
+ENDPROC(vfp_put_double)
diff --git a/arch/arm/vfp/vfpinstr.h b/arch/arm/vfp/vfpinstr.h
new file mode 100644
index 000000000..3c7938fd4
--- /dev/null
+++ b/arch/arm/vfp/vfpinstr.h
@@ -0,0 +1,100 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ *  linux/arch/arm/vfp/vfpinstr.h
+ *
+ *  Copyright (C) 2004 ARM Limited.
+ *  Written by Deep Blue Solutions Limited.
+ *
+ * VFP instruction masks.
+ */
+#define INST_CPRTDO(inst)	(((inst) & 0x0f000000) == 0x0e000000)
+#define INST_CPRT(inst)		((inst) & (1 << 4))
+#define INST_CPRT_L(inst)	((inst) & (1 << 20))
+#define INST_CPRT_Rd(inst)	(((inst) & (15 << 12)) >> 12)
+#define INST_CPRT_OP(inst)	(((inst) >> 21) & 7)
+#define INST_CPNUM(inst)	((inst) & 0xf00)
+#define CPNUM(cp)		((cp) << 8)
+
+#define FOP_MASK	(0x00b00040)
+#define FOP_FMAC	(0x00000000)
+#define FOP_FNMAC	(0x00000040)
+#define FOP_FMSC	(0x00100000)
+#define FOP_FNMSC	(0x00100040)
+#define FOP_FMUL	(0x00200000)
+#define FOP_FNMUL	(0x00200040)
+#define FOP_FADD	(0x00300000)
+#define FOP_FSUB	(0x00300040)
+#define FOP_FDIV	(0x00800000)
+#define FOP_EXT		(0x00b00040)
+
+#define FOP_TO_IDX(inst)	((inst & 0x00b00000) >> 20 | (inst & (1 << 6)) >> 4)
+
+#define FEXT_MASK	(0x000f0080)
+#define FEXT_FCPY	(0x00000000)
+#define FEXT_FABS	(0x00000080)
+#define FEXT_FNEG	(0x00010000)
+#define FEXT_FSQRT	(0x00010080)
+#define FEXT_FCMP	(0x00040000)
+#define FEXT_FCMPE	(0x00040080)
+#define FEXT_FCMPZ	(0x00050000)
+#define FEXT_FCMPEZ	(0x00050080)
+#define FEXT_FCVT	(0x00070080)
+#define FEXT_FUITO	(0x00080000)
+#define FEXT_FSITO	(0x00080080)
+#define FEXT_FTOUI	(0x000c0000)
+#define FEXT_FTOUIZ	(0x000c0080)
+#define FEXT_FTOSI	(0x000d0000)
+#define FEXT_FTOSIZ	(0x000d0080)
+
+#define FEXT_TO_IDX(inst)	((inst & 0x000f0000) >> 15 | (inst & (1 << 7)) >> 7)
+
+#define vfp_get_sd(inst)	((inst & 0x0000f000) >> 11 | (inst & (1 << 22)) >> 22)
+#define vfp_get_dd(inst)	((inst & 0x0000f000) >> 12 | (inst & (1 << 22)) >> 18)
+#define vfp_get_sm(inst)	((inst & 0x0000000f) << 1 | (inst & (1 << 5)) >> 5)
+#define vfp_get_dm(inst)	((inst & 0x0000000f) | (inst & (1 << 5)) >> 1)
+#define vfp_get_sn(inst)	((inst & 0x000f0000) >> 15 | (inst & (1 << 7)) >> 7)
+#define vfp_get_dn(inst)	((inst & 0x000f0000) >> 16 | (inst & (1 << 7)) >> 3)
+
+#define vfp_single(inst)	(((inst) & 0x0000f00) == 0xa00)
+
+#define FPSCR_N	(1 << 31)
+#define FPSCR_Z	(1 << 30)
+#define FPSCR_C (1 << 29)
+#define FPSCR_V	(1 << 28)
+
+#ifdef CONFIG_AS_VFP_VMRS_FPINST
+
+#define fmrx(_vfp_) ({			\
+	u32 __v;			\
+	asm(".fpu	vfpv2\n"	\
+	    "vmrs	%0, " #_vfp_	\
+	    : "=r" (__v) : : "cc");	\
+	__v;				\
+ })
+
+#define fmxr(_vfp_,_var_)		\
+	asm(".fpu	vfpv2\n"	\
+	    "vmsr	" #_vfp_ ", %0"	\
+	   : : "r" (_var_) : "cc")
+
+#else
+
+#define vfpreg(_vfp_) #_vfp_
+
+#define fmrx(_vfp_) ({			\
+	u32 __v;			\
+	asm("mrc p10, 7, %0, " vfpreg(_vfp_) ", cr0, 0 @ fmrx	%0, " #_vfp_	\
+	    : "=r" (__v) : : "cc");	\
+	__v;				\
+ })
+
+#define fmxr(_vfp_,_var_)		\
+	asm("mcr p10, 7, %0, " vfpreg(_vfp_) ", cr0, 0 @ fmxr	" #_vfp_ ", %0"	\
+	   : : "r" (_var_) : "cc")
+
+#endif
+
+u32 vfp_single_cpdo(u32 inst, u32 fpscr);
+u32 vfp_single_cprt(u32 inst, u32 fpscr, struct pt_regs *regs);
+
+u32 vfp_double_cpdo(u32 inst, u32 fpscr);
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
new file mode 100644
index 000000000..2cb355c1b
--- /dev/null
+++ b/arch/arm/vfp/vfpmodule.c
@@ -0,0 +1,870 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  linux/arch/arm/vfp/vfpmodule.c
+ *
+ *  Copyright (C) 2004 ARM Limited.
+ *  Written by Deep Blue Solutions Limited.
+ */
+#include <linux/types.h>
+#include <linux/cpu.h>
+#include <linux/cpu_pm.h>
+#include <linux/hardirq.h>
+#include <linux/kernel.h>
+#include <linux/notifier.h>
+#include <linux/signal.h>
+#include <linux/sched/signal.h>
+#include <linux/smp.h>
+#include <linux/init.h>
+#include <linux/uaccess.h>
+#include <linux/user.h>
+#include <linux/export.h>
+
+#include <asm/cp15.h>
+#include <asm/cputype.h>
+#include <asm/system_info.h>
+#include <asm/thread_notify.h>
+#include <asm/traps.h>
+#include <asm/vfp.h>
+
+#include "vfpinstr.h"
+#include "vfp.h"
+
+/*
+ * Our undef handlers (in entry.S)
+ */
+asmlinkage void vfp_support_entry(void);
+asmlinkage void vfp_null_entry(void);
+
+asmlinkage void (*vfp_vector)(void) = vfp_null_entry;
+
+/*
+ * Dual-use variable.
+ * Used in startup: set to non-zero if VFP checks fail
+ * After startup, holds VFP architecture
+ */
+static unsigned int __initdata VFP_arch;
+
+/*
+ * The pointer to the vfpstate structure of the thread which currently
+ * owns the context held in the VFP hardware, or NULL if the hardware
+ * context is invalid.
+ *
+ * For UP, this is sufficient to tell which thread owns the VFP context.
+ * However, for SMP, we also need to check the CPU number stored in the
+ * saved state too to catch migrations.
+ */
+union vfp_state *vfp_current_hw_state[NR_CPUS];
+
+/*
+ * Is 'thread's most up to date state stored in this CPUs hardware?
+ * Must be called from non-preemptible context.
+ */
+static bool vfp_state_in_hw(unsigned int cpu, struct thread_info *thread)
+{
+#ifdef CONFIG_SMP
+	if (thread->vfpstate.hard.cpu != cpu)
+		return false;
+#endif
+	return vfp_current_hw_state[cpu] == &thread->vfpstate;
+}
+
+/*
+ * Force a reload of the VFP context from the thread structure.  We do
+ * this by ensuring that access to the VFP hardware is disabled, and
+ * clear vfp_current_hw_state.  Must be called from non-preemptible context.
+ */
+static void vfp_force_reload(unsigned int cpu, struct thread_info *thread)
+{
+	if (vfp_state_in_hw(cpu, thread)) {
+		fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
+		vfp_current_hw_state[cpu] = NULL;
+	}
+#ifdef CONFIG_SMP
+	thread->vfpstate.hard.cpu = NR_CPUS;
+#endif
+}
+
+/*
+ * Per-thread VFP initialization.
+ */
+static void vfp_thread_flush(struct thread_info *thread)
+{
+	union vfp_state *vfp = &thread->vfpstate;
+	unsigned int cpu;
+
+	/*
+	 * Disable VFP to ensure we initialize it first.  We must ensure
+	 * that the modification of vfp_current_hw_state[] and hardware
+	 * disable are done for the same CPU and without preemption.
+	 *
+	 * Do this first to ensure that preemption won't overwrite our
+	 * state saving should access to the VFP be enabled at this point.
+	 */
+	cpu = get_cpu();
+	if (vfp_current_hw_state[cpu] == vfp)
+		vfp_current_hw_state[cpu] = NULL;
+	fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
+	put_cpu();
+
+	memset(vfp, 0, sizeof(union vfp_state));
+
+	vfp->hard.fpexc = FPEXC_EN;
+	vfp->hard.fpscr = FPSCR_ROUND_NEAREST;
+#ifdef CONFIG_SMP
+	vfp->hard.cpu = NR_CPUS;
+#endif
+}
+
+static void vfp_thread_exit(struct thread_info *thread)
+{
+	/* release case: Per-thread VFP cleanup. */
+	union vfp_state *vfp = &thread->vfpstate;
+	unsigned int cpu = get_cpu();
+
+	if (vfp_current_hw_state[cpu] == vfp)
+		vfp_current_hw_state[cpu] = NULL;
+	put_cpu();
+}
+
+static void vfp_thread_copy(struct thread_info *thread)
+{
+	struct thread_info *parent = current_thread_info();
+
+	vfp_sync_hwstate(parent);
+	thread->vfpstate = parent->vfpstate;
+#ifdef CONFIG_SMP
+	thread->vfpstate.hard.cpu = NR_CPUS;
+#endif
+}
+
+/*
+ * When this function is called with the following 'cmd's, the following
+ * is true while this function is being run:
+ *  THREAD_NOFTIFY_SWTICH:
+ *   - the previously running thread will not be scheduled onto another CPU.
+ *   - the next thread to be run (v) will not be running on another CPU.
+ *   - thread->cpu is the local CPU number
+ *   - not preemptible as we're called in the middle of a thread switch
+ *  THREAD_NOTIFY_FLUSH:
+ *   - the thread (v) will be running on the local CPU, so
+ *	v === current_thread_info()
+ *   - thread->cpu is the local CPU number at the time it is accessed,
+ *	but may change at any time.
+ *   - we could be preempted if tree preempt rcu is enabled, so
+ *	it is unsafe to use thread->cpu.
+ *  THREAD_NOTIFY_EXIT
+ *   - we could be preempted if tree preempt rcu is enabled, so
+ *	it is unsafe to use thread->cpu.
+ */
+static int vfp_notifier(struct notifier_block *self, unsigned long cmd, void *v)
+{
+	struct thread_info *thread = v;
+	u32 fpexc;
+#ifdef CONFIG_SMP
+	unsigned int cpu;
+#endif
+
+	switch (cmd) {
+	case THREAD_NOTIFY_SWITCH:
+		fpexc = fmrx(FPEXC);
+
+#ifdef CONFIG_SMP
+		cpu = thread->cpu;
+
+		/*
+		 * On SMP, if VFP is enabled, save the old state in
+		 * case the thread migrates to a different CPU. The
+		 * restoring is done lazily.
+		 */
+		if ((fpexc & FPEXC_EN) && vfp_current_hw_state[cpu])
+			vfp_save_state(vfp_current_hw_state[cpu], fpexc);
+#endif
+
+		/*
+		 * Always disable VFP so we can lazily save/restore the
+		 * old state.
+		 */
+		fmxr(FPEXC, fpexc & ~FPEXC_EN);
+		break;
+
+	case THREAD_NOTIFY_FLUSH:
+		vfp_thread_flush(thread);
+		break;
+
+	case THREAD_NOTIFY_EXIT:
+		vfp_thread_exit(thread);
+		break;
+
+	case THREAD_NOTIFY_COPY:
+		vfp_thread_copy(thread);
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block vfp_notifier_block = {
+	.notifier_call	= vfp_notifier,
+};
+
+/*
+ * Raise a SIGFPE for the current process.
+ * sicode describes the signal being raised.
+ */
+static void vfp_raise_sigfpe(unsigned int sicode, struct pt_regs *regs)
+{
+	/*
+	 * This is the same as NWFPE, because it's not clear what
+	 * this is used for
+	 */
+	current->thread.error_code = 0;
+	current->thread.trap_no = 6;
+
+	send_sig_fault(SIGFPE, sicode,
+		       (void __user *)(instruction_pointer(regs) - 4),
+		       current);
+}
+
+static void vfp_panic(char *reason, u32 inst)
+{
+	int i;
+
+	pr_err("VFP: Error: %s\n", reason);
+	pr_err("VFP: EXC 0x%08x SCR 0x%08x INST 0x%08x\n",
+		fmrx(FPEXC), fmrx(FPSCR), inst);
+	for (i = 0; i < 32; i += 2)
+		pr_err("VFP: s%2u: 0x%08x s%2u: 0x%08x\n",
+		       i, vfp_get_float(i), i+1, vfp_get_float(i+1));
+}
+
+/*
+ * Process bitmask of exception conditions.
+ */
+static void vfp_raise_exceptions(u32 exceptions, u32 inst, u32 fpscr, struct pt_regs *regs)
+{
+	int si_code = 0;
+
+	pr_debug("VFP: raising exceptions %08x\n", exceptions);
+
+	if (exceptions == VFP_EXCEPTION_ERROR) {
+		vfp_panic("unhandled bounce", inst);
+		vfp_raise_sigfpe(FPE_FLTINV, regs);
+		return;
+	}
+
+	/*
+	 * If any of the status flags are set, update the FPSCR.
+	 * Comparison instructions always return at least one of
+	 * these flags set.
+	 */
+	if (exceptions & (FPSCR_N|FPSCR_Z|FPSCR_C|FPSCR_V))
+		fpscr &= ~(FPSCR_N|FPSCR_Z|FPSCR_C|FPSCR_V);
+
+	fpscr |= exceptions;
+
+	fmxr(FPSCR, fpscr);
+
+#define RAISE(stat,en,sig)				\
+	if (exceptions & stat && fpscr & en)		\
+		si_code = sig;
+
+	/*
+	 * These are arranged in priority order, least to highest.
+	 */
+	RAISE(FPSCR_DZC, FPSCR_DZE, FPE_FLTDIV);
+	RAISE(FPSCR_IXC, FPSCR_IXE, FPE_FLTRES);
+	RAISE(FPSCR_UFC, FPSCR_UFE, FPE_FLTUND);
+	RAISE(FPSCR_OFC, FPSCR_OFE, FPE_FLTOVF);
+	RAISE(FPSCR_IOC, FPSCR_IOE, FPE_FLTINV);
+
+	if (si_code)
+		vfp_raise_sigfpe(si_code, regs);
+}
+
+/*
+ * Emulate a VFP instruction.
+ */
+static u32 vfp_emulate_instruction(u32 inst, u32 fpscr, struct pt_regs *regs)
+{
+	u32 exceptions = VFP_EXCEPTION_ERROR;
+
+	pr_debug("VFP: emulate: INST=0x%08x SCR=0x%08x\n", inst, fpscr);
+
+	if (INST_CPRTDO(inst)) {
+		if (!INST_CPRT(inst)) {
+			/*
+			 * CPDO
+			 */
+			if (vfp_single(inst)) {
+				exceptions = vfp_single_cpdo(inst, fpscr);
+			} else {
+				exceptions = vfp_double_cpdo(inst, fpscr);
+			}
+		} else {
+			/*
+			 * A CPRT instruction can not appear in FPINST2, nor
+			 * can it cause an exception.  Therefore, we do not
+			 * have to emulate it.
+			 */
+		}
+	} else {
+		/*
+		 * A CPDT instruction can not appear in FPINST2, nor can
+		 * it cause an exception.  Therefore, we do not have to
+		 * emulate it.
+		 */
+	}
+	return exceptions & ~VFP_NAN_FLAG;
+}
+
+/*
+ * Package up a bounce condition.
+ */
+void VFP_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs)
+{
+	u32 fpscr, orig_fpscr, fpsid, exceptions;
+
+	pr_debug("VFP: bounce: trigger %08x fpexc %08x\n", trigger, fpexc);
+
+	/*
+	 * At this point, FPEXC can have the following configuration:
+	 *
+	 *  EX DEX IXE
+	 *  0   1   x   - synchronous exception
+	 *  1   x   0   - asynchronous exception
+	 *  1   x   1   - sychronous on VFP subarch 1 and asynchronous on later
+	 *  0   0   1   - synchronous on VFP9 (non-standard subarch 1
+	 *                implementation), undefined otherwise
+	 *
+	 * Clear various bits and enable access to the VFP so we can
+	 * handle the bounce.
+	 */
+	fmxr(FPEXC, fpexc & ~(FPEXC_EX|FPEXC_DEX|FPEXC_FP2V|FPEXC_VV|FPEXC_TRAP_MASK));
+
+	fpsid = fmrx(FPSID);
+	orig_fpscr = fpscr = fmrx(FPSCR);
+
+	/*
+	 * Check for the special VFP subarch 1 and FPSCR.IXE bit case
+	 */
+	if ((fpsid & FPSID_ARCH_MASK) == (1 << FPSID_ARCH_BIT)
+	    && (fpscr & FPSCR_IXE)) {
+		/*
+		 * Synchronous exception, emulate the trigger instruction
+		 */
+		goto emulate;
+	}
+
+	if (fpexc & FPEXC_EX) {
+#ifndef CONFIG_CPU_FEROCEON
+		/*
+		 * Asynchronous exception. The instruction is read from FPINST
+		 * and the interrupted instruction has to be restarted.
+		 */
+		trigger = fmrx(FPINST);
+		regs->ARM_pc -= 4;
+#endif
+	} else if (!(fpexc & FPEXC_DEX)) {
+		/*
+		 * Illegal combination of bits. It can be caused by an
+		 * unallocated VFP instruction but with FPSCR.IXE set and not
+		 * on VFP subarch 1.
+		 */
+		 vfp_raise_exceptions(VFP_EXCEPTION_ERROR, trigger, fpscr, regs);
+		goto exit;
+	}
+
+	/*
+	 * Modify fpscr to indicate the number of iterations remaining.
+	 * If FPEXC.EX is 0, FPEXC.DEX is 1 and the FPEXC.VV bit indicates
+	 * whether FPEXC.VECITR or FPSCR.LEN is used.
+	 */
+	if (fpexc & (FPEXC_EX | FPEXC_VV)) {
+		u32 len;
+
+		len = fpexc + (1 << FPEXC_LENGTH_BIT);
+
+		fpscr &= ~FPSCR_LENGTH_MASK;
+		fpscr |= (len & FPEXC_LENGTH_MASK) << (FPSCR_LENGTH_BIT - FPEXC_LENGTH_BIT);
+	}
+
+	/*
+	 * Handle the first FP instruction.  We used to take note of the
+	 * FPEXC bounce reason, but this appears to be unreliable.
+	 * Emulate the bounced instruction instead.
+	 */
+	exceptions = vfp_emulate_instruction(trigger, fpscr, regs);
+	if (exceptions)
+		vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs);
+
+	/*
+	 * If there isn't a second FP instruction, exit now. Note that
+	 * the FPEXC.FP2V bit is valid only if FPEXC.EX is 1.
+	 */
+	if ((fpexc & (FPEXC_EX | FPEXC_FP2V)) != (FPEXC_EX | FPEXC_FP2V))
+		goto exit;
+
+	/*
+	 * The barrier() here prevents fpinst2 being read
+	 * before the condition above.
+	 */
+	barrier();
+	trigger = fmrx(FPINST2);
+
+ emulate:
+	exceptions = vfp_emulate_instruction(trigger, orig_fpscr, regs);
+	if (exceptions)
+		vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs);
+ exit:
+	preempt_enable();
+}
+
+static void vfp_enable(void *unused)
+{
+	u32 access;
+
+	BUG_ON(preemptible());
+	access = get_copro_access();
+
+	/*
+	 * Enable full access to VFP (cp10 and cp11)
+	 */
+	set_copro_access(access | CPACC_FULL(10) | CPACC_FULL(11));
+}
+
+/* Called by platforms on which we want to disable VFP because it may not be
+ * present on all CPUs within a SMP complex. Needs to be called prior to
+ * vfp_init().
+ */
+void __init vfp_disable(void)
+{
+	if (VFP_arch) {
+		pr_debug("%s: should be called prior to vfp_init\n", __func__);
+		return;
+	}
+	VFP_arch = 1;
+}
+
+#ifdef CONFIG_CPU_PM
+static int vfp_pm_suspend(void)
+{
+	struct thread_info *ti = current_thread_info();
+	u32 fpexc = fmrx(FPEXC);
+
+	/* if vfp is on, then save state for resumption */
+	if (fpexc & FPEXC_EN) {
+		pr_debug("%s: saving vfp state\n", __func__);
+		vfp_save_state(&ti->vfpstate, fpexc);
+
+		/* disable, just in case */
+		fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
+	} else if (vfp_current_hw_state[ti->cpu]) {
+#ifndef CONFIG_SMP
+		fmxr(FPEXC, fpexc | FPEXC_EN);
+		vfp_save_state(vfp_current_hw_state[ti->cpu], fpexc);
+		fmxr(FPEXC, fpexc);
+#endif
+	}
+
+	/* clear any information we had about last context state */
+	vfp_current_hw_state[ti->cpu] = NULL;
+
+	return 0;
+}
+
+static void vfp_pm_resume(void)
+{
+	/* ensure we have access to the vfp */
+	vfp_enable(NULL);
+
+	/* and disable it to ensure the next usage restores the state */
+	fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
+}
+
+static int vfp_cpu_pm_notifier(struct notifier_block *self, unsigned long cmd,
+	void *v)
+{
+	switch (cmd) {
+	case CPU_PM_ENTER:
+		vfp_pm_suspend();
+		break;
+	case CPU_PM_ENTER_FAILED:
+	case CPU_PM_EXIT:
+		vfp_pm_resume();
+		break;
+	}
+	return NOTIFY_OK;
+}
+
+static struct notifier_block vfp_cpu_pm_notifier_block = {
+	.notifier_call = vfp_cpu_pm_notifier,
+};
+
+static void vfp_pm_init(void)
+{
+	cpu_pm_register_notifier(&vfp_cpu_pm_notifier_block);
+}
+
+#else
+static inline void vfp_pm_init(void) { }
+#endif /* CONFIG_CPU_PM */
+
+/*
+ * Ensure that the VFP state stored in 'thread->vfpstate' is up to date
+ * with the hardware state.
+ */
+void vfp_sync_hwstate(struct thread_info *thread)
+{
+	unsigned int cpu = get_cpu();
+
+	if (vfp_state_in_hw(cpu, thread)) {
+		u32 fpexc = fmrx(FPEXC);
+
+		/*
+		 * Save the last VFP state on this CPU.
+		 */
+		fmxr(FPEXC, fpexc | FPEXC_EN);
+		vfp_save_state(&thread->vfpstate, fpexc | FPEXC_EN);
+		fmxr(FPEXC, fpexc);
+	}
+
+	put_cpu();
+}
+
+/* Ensure that the thread reloads the hardware VFP state on the next use. */
+void vfp_flush_hwstate(struct thread_info *thread)
+{
+	unsigned int cpu = get_cpu();
+
+	vfp_force_reload(cpu, thread);
+
+	put_cpu();
+}
+
+/*
+ * Save the current VFP state into the provided structures and prepare
+ * for entry into a new function (signal handler).
+ */
+int vfp_preserve_user_clear_hwstate(struct user_vfp *ufp,
+				    struct user_vfp_exc *ufp_exc)
+{
+	struct thread_info *thread = current_thread_info();
+	struct vfp_hard_struct *hwstate = &thread->vfpstate.hard;
+
+	/* Ensure that the saved hwstate is up-to-date. */
+	vfp_sync_hwstate(thread);
+
+	/*
+	 * Copy the floating point registers. There can be unused
+	 * registers see asm/hwcap.h for details.
+	 */
+	memcpy(&ufp->fpregs, &hwstate->fpregs, sizeof(hwstate->fpregs));
+
+	/*
+	 * Copy the status and control register.
+	 */
+	ufp->fpscr = hwstate->fpscr;
+
+	/*
+	 * Copy the exception registers.
+	 */
+	ufp_exc->fpexc = hwstate->fpexc;
+	ufp_exc->fpinst = hwstate->fpinst;
+	ufp_exc->fpinst2 = hwstate->fpinst2;
+
+	/* Ensure that VFP is disabled. */
+	vfp_flush_hwstate(thread);
+
+	/*
+	 * As per the PCS, clear the length and stride bits for function
+	 * entry.
+	 */
+	hwstate->fpscr &= ~(FPSCR_LENGTH_MASK | FPSCR_STRIDE_MASK);
+	return 0;
+}
+
+/* Sanitise and restore the current VFP state from the provided structures. */
+int vfp_restore_user_hwstate(struct user_vfp *ufp, struct user_vfp_exc *ufp_exc)
+{
+	struct thread_info *thread = current_thread_info();
+	struct vfp_hard_struct *hwstate = &thread->vfpstate.hard;
+	unsigned long fpexc;
+
+	/* Disable VFP to avoid corrupting the new thread state. */
+	vfp_flush_hwstate(thread);
+
+	/*
+	 * Copy the floating point registers. There can be unused
+	 * registers see asm/hwcap.h for details.
+	 */
+	memcpy(&hwstate->fpregs, &ufp->fpregs, sizeof(hwstate->fpregs));
+	/*
+	 * Copy the status and control register.
+	 */
+	hwstate->fpscr = ufp->fpscr;
+
+	/*
+	 * Sanitise and restore the exception registers.
+	 */
+	fpexc = ufp_exc->fpexc;
+
+	/* Ensure the VFP is enabled. */
+	fpexc |= FPEXC_EN;
+
+	/* Ensure FPINST2 is invalid and the exception flag is cleared. */
+	fpexc &= ~(FPEXC_EX | FPEXC_FP2V);
+	hwstate->fpexc = fpexc;
+
+	hwstate->fpinst = ufp_exc->fpinst;
+	hwstate->fpinst2 = ufp_exc->fpinst2;
+
+	return 0;
+}
+
+/*
+ * VFP hardware can lose all context when a CPU goes offline.
+ * As we will be running in SMP mode with CPU hotplug, we will save the
+ * hardware state at every thread switch.  We clear our held state when
+ * a CPU has been killed, indicating that the VFP hardware doesn't contain
+ * a threads VFP state.  When a CPU starts up, we re-enable access to the
+ * VFP hardware. The callbacks below are called on the CPU which
+ * is being offlined/onlined.
+ */
+static int vfp_dying_cpu(unsigned int cpu)
+{
+	vfp_current_hw_state[cpu] = NULL;
+	return 0;
+}
+
+static int vfp_starting_cpu(unsigned int unused)
+{
+	vfp_enable(NULL);
+	return 0;
+}
+
+#ifdef CONFIG_KERNEL_MODE_NEON
+
+static int vfp_kmode_exception(struct pt_regs *regs, unsigned int instr)
+{
+	/*
+	 * If we reach this point, a floating point exception has been raised
+	 * while running in kernel mode. If the NEON/VFP unit was enabled at the
+	 * time, it means a VFP instruction has been issued that requires
+	 * software assistance to complete, something which is not currently
+	 * supported in kernel mode.
+	 * If the NEON/VFP unit was disabled, and the location pointed to below
+	 * is properly preceded by a call to kernel_neon_begin(), something has
+	 * caused the task to be scheduled out and back in again. In this case,
+	 * rebuilding and running with CONFIG_DEBUG_ATOMIC_SLEEP enabled should
+	 * be helpful in localizing the problem.
+	 */
+	if (fmrx(FPEXC) & FPEXC_EN)
+		pr_crit("BUG: unsupported FP instruction in kernel mode\n");
+	else
+		pr_crit("BUG: FP instruction issued in kernel mode with FP unit disabled\n");
+	pr_crit("FPEXC == 0x%08x\n", fmrx(FPEXC));
+	return 1;
+}
+
+static struct undef_hook vfp_kmode_exception_hook[] = {{
+	.instr_mask	= 0xfe000000,
+	.instr_val	= 0xf2000000,
+	.cpsr_mask	= MODE_MASK | PSR_T_BIT,
+	.cpsr_val	= SVC_MODE,
+	.fn		= vfp_kmode_exception,
+}, {
+	.instr_mask	= 0xff100000,
+	.instr_val	= 0xf4000000,
+	.cpsr_mask	= MODE_MASK | PSR_T_BIT,
+	.cpsr_val	= SVC_MODE,
+	.fn		= vfp_kmode_exception,
+}, {
+	.instr_mask	= 0xef000000,
+	.instr_val	= 0xef000000,
+	.cpsr_mask	= MODE_MASK | PSR_T_BIT,
+	.cpsr_val	= SVC_MODE | PSR_T_BIT,
+	.fn		= vfp_kmode_exception,
+}, {
+	.instr_mask	= 0xff100000,
+	.instr_val	= 0xf9000000,
+	.cpsr_mask	= MODE_MASK | PSR_T_BIT,
+	.cpsr_val	= SVC_MODE | PSR_T_BIT,
+	.fn		= vfp_kmode_exception,
+}, {
+	.instr_mask	= 0x0c000e00,
+	.instr_val	= 0x0c000a00,
+	.cpsr_mask	= MODE_MASK,
+	.cpsr_val	= SVC_MODE,
+	.fn		= vfp_kmode_exception,
+}};
+
+static int __init vfp_kmode_exception_hook_init(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(vfp_kmode_exception_hook); i++)
+		register_undef_hook(&vfp_kmode_exception_hook[i]);
+	return 0;
+}
+subsys_initcall(vfp_kmode_exception_hook_init);
+
+/*
+ * Kernel-side NEON support functions
+ */
+void kernel_neon_begin(void)
+{
+	struct thread_info *thread = current_thread_info();
+	unsigned int cpu;
+	u32 fpexc;
+
+	/*
+	 * Kernel mode NEON is only allowed outside of interrupt context
+	 * with preemption disabled. This will make sure that the kernel
+	 * mode NEON register contents never need to be preserved.
+	 */
+	BUG_ON(in_interrupt());
+	cpu = get_cpu();
+
+	fpexc = fmrx(FPEXC) | FPEXC_EN;
+	fmxr(FPEXC, fpexc);
+
+	/*
+	 * Save the userland NEON/VFP state. Under UP,
+	 * the owner could be a task other than 'current'
+	 */
+	if (vfp_state_in_hw(cpu, thread))
+		vfp_save_state(&thread->vfpstate, fpexc);
+#ifndef CONFIG_SMP
+	else if (vfp_current_hw_state[cpu] != NULL)
+		vfp_save_state(vfp_current_hw_state[cpu], fpexc);
+#endif
+	vfp_current_hw_state[cpu] = NULL;
+}
+EXPORT_SYMBOL(kernel_neon_begin);
+
+void kernel_neon_end(void)
+{
+	/* Disable the NEON/VFP unit. */
+	fmxr(FPEXC, fmrx(FPEXC) & ~FPEXC_EN);
+	put_cpu();
+}
+EXPORT_SYMBOL(kernel_neon_end);
+
+#endif /* CONFIG_KERNEL_MODE_NEON */
+
+static int __init vfp_detect(struct pt_regs *regs, unsigned int instr)
+{
+	VFP_arch = UINT_MAX;	/* mark as not present */
+	regs->ARM_pc += 4;
+	return 0;
+}
+
+static struct undef_hook vfp_detect_hook __initdata = {
+	.instr_mask	= 0x0c000e00,
+	.instr_val	= 0x0c000a00,
+	.cpsr_mask	= MODE_MASK,
+	.cpsr_val	= SVC_MODE,
+	.fn		= vfp_detect,
+};
+
+/*
+ * VFP support code initialisation.
+ */
+static int __init vfp_init(void)
+{
+	unsigned int vfpsid;
+	unsigned int cpu_arch = cpu_architecture();
+
+	/*
+	 * Enable the access to the VFP on all online CPUs so the
+	 * following test on FPSID will succeed.
+	 */
+	if (cpu_arch >= CPU_ARCH_ARMv6)
+		on_each_cpu(vfp_enable, NULL, 1);
+
+	/*
+	 * First check that there is a VFP that we can use.
+	 * The handler is already setup to just log calls, so
+	 * we just need to read the VFPSID register.
+	 */
+	register_undef_hook(&vfp_detect_hook);
+	barrier();
+	vfpsid = fmrx(FPSID);
+	barrier();
+	unregister_undef_hook(&vfp_detect_hook);
+	vfp_vector = vfp_null_entry;
+
+	pr_info("VFP support v0.3: ");
+	if (VFP_arch) {
+		pr_cont("not present\n");
+		return 0;
+	/* Extract the architecture on CPUID scheme */
+	} else if ((read_cpuid_id() & 0x000f0000) == 0x000f0000) {
+		VFP_arch = vfpsid & FPSID_CPUID_ARCH_MASK;
+		VFP_arch >>= FPSID_ARCH_BIT;
+		/*
+		 * Check for the presence of the Advanced SIMD
+		 * load/store instructions, integer and single
+		 * precision floating point operations. Only check
+		 * for NEON if the hardware has the MVFR registers.
+		 */
+		if (IS_ENABLED(CONFIG_NEON) &&
+		   (fmrx(MVFR1) & 0x000fff00) == 0x00011100)
+			elf_hwcap |= HWCAP_NEON;
+
+		if (IS_ENABLED(CONFIG_VFPv3)) {
+			u32 mvfr0 = fmrx(MVFR0);
+			if (((mvfr0 & MVFR0_DP_MASK) >> MVFR0_DP_BIT) == 0x2 ||
+			    ((mvfr0 & MVFR0_SP_MASK) >> MVFR0_SP_BIT) == 0x2) {
+				elf_hwcap |= HWCAP_VFPv3;
+				/*
+				 * Check for VFPv3 D16 and VFPv4 D16.  CPUs in
+				 * this configuration only have 16 x 64bit
+				 * registers.
+				 */
+				if ((mvfr0 & MVFR0_A_SIMD_MASK) == 1)
+					/* also v4-D16 */
+					elf_hwcap |= HWCAP_VFPv3D16;
+				else
+					elf_hwcap |= HWCAP_VFPD32;
+			}
+
+			if ((fmrx(MVFR1) & 0xf0000000) == 0x10000000)
+				elf_hwcap |= HWCAP_VFPv4;
+		}
+	/* Extract the architecture version on pre-cpuid scheme */
+	} else {
+		if (vfpsid & FPSID_NODOUBLE) {
+			pr_cont("no double precision support\n");
+			return 0;
+		}
+
+		VFP_arch = (vfpsid & FPSID_ARCH_MASK) >> FPSID_ARCH_BIT;
+	}
+
+	cpuhp_setup_state_nocalls(CPUHP_AP_ARM_VFP_STARTING,
+				  "arm/vfp:starting", vfp_starting_cpu,
+				  vfp_dying_cpu);
+
+	vfp_vector = vfp_support_entry;
+
+	thread_register_notifier(&vfp_notifier_block);
+	vfp_pm_init();
+
+	/*
+	 * We detected VFP, and the support code is
+	 * in place; report VFP support to userspace.
+	 */
+	elf_hwcap |= HWCAP_VFP;
+
+	pr_cont("implementor %02x architecture %d part %02x variant %x rev %x\n",
+		(vfpsid & FPSID_IMPLEMENTER_MASK) >> FPSID_IMPLEMENTER_BIT,
+		VFP_arch,
+		(vfpsid & FPSID_PART_MASK) >> FPSID_PART_BIT,
+		(vfpsid & FPSID_VARIANT_MASK) >> FPSID_VARIANT_BIT,
+		(vfpsid & FPSID_REV_MASK) >> FPSID_REV_BIT);
+
+	return 0;
+}
+
+core_initcall(vfp_init);
diff --git a/arch/arm/vfp/vfpsingle.c b/arch/arm/vfp/vfpsingle.c
new file mode 100644
index 000000000..f0465ba0f
--- /dev/null
+++ b/arch/arm/vfp/vfpsingle.c
@@ -0,0 +1,1246 @@
+/*
+ *  linux/arch/arm/vfp/vfpsingle.c
+ *
+ * This code is derived in part from John R. Housers softfloat library, which
+ * carries the following notice:
+ *
+ * ===========================================================================
+ * This C source file is part of the SoftFloat IEC/IEEE Floating-point
+ * Arithmetic Package, Release 2.
+ *
+ * Written by John R. Hauser.  This work was made possible in part by the
+ * International Computer Science Institute, located at Suite 600, 1947 Center
+ * Street, Berkeley, California 94704.  Funding was partially provided by the
+ * National Science Foundation under grant MIP-9311980.  The original version
+ * of this code was written as part of a project to build a fixed-point vector
+ * processor in collaboration with the University of California at Berkeley,
+ * overseen by Profs. Nelson Morgan and John Wawrzynek.  More information
+ * is available through the web page `http://HTTP.CS.Berkeley.EDU/~jhauser/
+ * arithmetic/softfloat.html'.
+ *
+ * THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort
+ * has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
+ * TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO
+ * PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
+ * AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
+ *
+ * Derivative works are acceptable, even for commercial purposes, so long as
+ * (1) they include prominent notice that the work is derivative, and (2) they
+ * include prominent notice akin to these three paragraphs for those parts of
+ * this code that are retained.
+ * ===========================================================================
+ */
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+
+#include <asm/div64.h>
+#include <asm/vfp.h>
+
+#include "vfpinstr.h"
+#include "vfp.h"
+
+static struct vfp_single vfp_single_default_qnan = {
+	.exponent	= 255,
+	.sign		= 0,
+	.significand	= VFP_SINGLE_SIGNIFICAND_QNAN,
+};
+
+static void vfp_single_dump(const char *str, struct vfp_single *s)
+{
+	pr_debug("VFP: %s: sign=%d exponent=%d significand=%08x\n",
+		 str, s->sign != 0, s->exponent, s->significand);
+}
+
+static void vfp_single_normalise_denormal(struct vfp_single *vs)
+{
+	int bits = 31 - fls(vs->significand);
+
+	vfp_single_dump("normalise_denormal: in", vs);
+
+	if (bits) {
+		vs->exponent -= bits - 1;
+		vs->significand <<= bits;
+	}
+
+	vfp_single_dump("normalise_denormal: out", vs);
+}
+
+#ifndef DEBUG
+#define vfp_single_normaliseround(sd,vsd,fpscr,except,func) __vfp_single_normaliseround(sd,vsd,fpscr,except)
+u32 __vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exceptions)
+#else
+u32 vfp_single_normaliseround(int sd, struct vfp_single *vs, u32 fpscr, u32 exceptions, const char *func)
+#endif
+{
+	u32 significand, incr, rmode;
+	int exponent, shift, underflow;
+
+	vfp_single_dump("pack: in", vs);
+
+	/*
+	 * Infinities and NaNs are a special case.
+	 */
+	if (vs->exponent == 255 && (vs->significand == 0 || exceptions))
+		goto pack;
+
+	/*
+	 * Special-case zero.
+	 */
+	if (vs->significand == 0) {
+		vs->exponent = 0;
+		goto pack;
+	}
+
+	exponent = vs->exponent;
+	significand = vs->significand;
+
+	/*
+	 * Normalise first.  Note that we shift the significand up to
+	 * bit 31, so we have VFP_SINGLE_LOW_BITS + 1 below the least
+	 * significant bit.
+	 */
+	shift = 32 - fls(significand);
+	if (shift < 32 && shift) {
+		exponent -= shift;
+		significand <<= shift;
+	}
+
+#ifdef DEBUG
+	vs->exponent = exponent;
+	vs->significand = significand;
+	vfp_single_dump("pack: normalised", vs);
+#endif
+
+	/*
+	 * Tiny number?
+	 */
+	underflow = exponent < 0;
+	if (underflow) {
+		significand = vfp_shiftright32jamming(significand, -exponent);
+		exponent = 0;
+#ifdef DEBUG
+		vs->exponent = exponent;
+		vs->significand = significand;
+		vfp_single_dump("pack: tiny number", vs);
+#endif
+		if (!(significand & ((1 << (VFP_SINGLE_LOW_BITS + 1)) - 1)))
+			underflow = 0;
+	}
+
+	/*
+	 * Select rounding increment.
+	 */
+	incr = 0;
+	rmode = fpscr & FPSCR_RMODE_MASK;
+
+	if (rmode == FPSCR_ROUND_NEAREST) {
+		incr = 1 << VFP_SINGLE_LOW_BITS;
+		if ((significand & (1 << (VFP_SINGLE_LOW_BITS + 1))) == 0)
+			incr -= 1;
+	} else if (rmode == FPSCR_ROUND_TOZERO) {
+		incr = 0;
+	} else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vs->sign != 0))
+		incr = (1 << (VFP_SINGLE_LOW_BITS + 1)) - 1;
+
+	pr_debug("VFP: rounding increment = 0x%08x\n", incr);
+
+	/*
+	 * Is our rounding going to overflow?
+	 */
+	if ((significand + incr) < significand) {
+		exponent += 1;
+		significand = (significand >> 1) | (significand & 1);
+		incr >>= 1;
+#ifdef DEBUG
+		vs->exponent = exponent;
+		vs->significand = significand;
+		vfp_single_dump("pack: overflow", vs);
+#endif
+	}
+
+	/*
+	 * If any of the low bits (which will be shifted out of the
+	 * number) are non-zero, the result is inexact.
+	 */
+	if (significand & ((1 << (VFP_SINGLE_LOW_BITS + 1)) - 1))
+		exceptions |= FPSCR_IXC;
+
+	/*
+	 * Do our rounding.
+	 */
+	significand += incr;
+
+	/*
+	 * Infinity?
+	 */
+	if (exponent >= 254) {
+		exceptions |= FPSCR_OFC | FPSCR_IXC;
+		if (incr == 0) {
+			vs->exponent = 253;
+			vs->significand = 0x7fffffff;
+		} else {
+			vs->exponent = 255;		/* infinity */
+			vs->significand = 0;
+		}
+	} else {
+		if (significand >> (VFP_SINGLE_LOW_BITS + 1) == 0)
+			exponent = 0;
+		if (exponent || significand > 0x80000000)
+			underflow = 0;
+		if (underflow)
+			exceptions |= FPSCR_UFC;
+		vs->exponent = exponent;
+		vs->significand = significand >> 1;
+	}
+
+ pack:
+	vfp_single_dump("pack: final", vs);
+	{
+		s32 d = vfp_single_pack(vs);
+#ifdef DEBUG
+		pr_debug("VFP: %s: d(s%d)=%08x exceptions=%08x\n", func,
+			 sd, d, exceptions);
+#endif
+		vfp_put_float(d, sd);
+	}
+
+	return exceptions;
+}
+
+/*
+ * Propagate the NaN, setting exceptions if it is signalling.
+ * 'n' is always a NaN.  'm' may be a number, NaN or infinity.
+ */
+static u32
+vfp_propagate_nan(struct vfp_single *vsd, struct vfp_single *vsn,
+		  struct vfp_single *vsm, u32 fpscr)
+{
+	struct vfp_single *nan;
+	int tn, tm = 0;
+
+	tn = vfp_single_type(vsn);
+
+	if (vsm)
+		tm = vfp_single_type(vsm);
+
+	if (fpscr & FPSCR_DEFAULT_NAN)
+		/*
+		 * Default NaN mode - always returns a quiet NaN
+		 */
+		nan = &vfp_single_default_qnan;
+	else {
+		/*
+		 * Contemporary mode - select the first signalling
+		 * NAN, or if neither are signalling, the first
+		 * quiet NAN.
+		 */
+		if (tn == VFP_SNAN || (tm != VFP_SNAN && tn == VFP_QNAN))
+			nan = vsn;
+		else
+			nan = vsm;
+		/*
+		 * Make the NaN quiet.
+		 */
+		nan->significand |= VFP_SINGLE_SIGNIFICAND_QNAN;
+	}
+
+	*vsd = *nan;
+
+	/*
+	 * If one was a signalling NAN, raise invalid operation.
+	 */
+	return tn == VFP_SNAN || tm == VFP_SNAN ? FPSCR_IOC : VFP_NAN_FLAG;
+}
+
+
+/*
+ * Extended operations
+ */
+static u32 vfp_single_fabs(int sd, int unused, s32 m, u32 fpscr)
+{
+	vfp_put_float(vfp_single_packed_abs(m), sd);
+	return 0;
+}
+
+static u32 vfp_single_fcpy(int sd, int unused, s32 m, u32 fpscr)
+{
+	vfp_put_float(m, sd);
+	return 0;
+}
+
+static u32 vfp_single_fneg(int sd, int unused, s32 m, u32 fpscr)
+{
+	vfp_put_float(vfp_single_packed_negate(m), sd);
+	return 0;
+}
+
+static const u16 sqrt_oddadjust[] = {
+	0x0004, 0x0022, 0x005d, 0x00b1, 0x011d, 0x019f, 0x0236, 0x02e0,
+	0x039c, 0x0468, 0x0545, 0x0631, 0x072b, 0x0832, 0x0946, 0x0a67
+};
+
+static const u16 sqrt_evenadjust[] = {
+	0x0a2d, 0x08af, 0x075a, 0x0629, 0x051a, 0x0429, 0x0356, 0x029e,
+	0x0200, 0x0179, 0x0109, 0x00af, 0x0068, 0x0034, 0x0012, 0x0002
+};
+
+u32 vfp_estimate_sqrt_significand(u32 exponent, u32 significand)
+{
+	int index;
+	u32 z, a;
+
+	if ((significand & 0xc0000000) != 0x40000000) {
+		pr_warn("VFP: estimate_sqrt: invalid significand\n");
+	}
+
+	a = significand << 1;
+	index = (a >> 27) & 15;
+	if (exponent & 1) {
+		z = 0x4000 + (a >> 17) - sqrt_oddadjust[index];
+		z = ((a / z) << 14) + (z << 15);
+		a >>= 1;
+	} else {
+		z = 0x8000 + (a >> 17) - sqrt_evenadjust[index];
+		z = a / z + z;
+		z = (z >= 0x20000) ? 0xffff8000 : (z << 15);
+		if (z <= a)
+			return (s32)a >> 1;
+	}
+	{
+		u64 v = (u64)a << 31;
+		do_div(v, z);
+		return v + (z >> 1);
+	}
+}
+
+static u32 vfp_single_fsqrt(int sd, int unused, s32 m, u32 fpscr)
+{
+	struct vfp_single vsm, vsd;
+	int ret, tm;
+
+	vfp_single_unpack(&vsm, m);
+	tm = vfp_single_type(&vsm);
+	if (tm & (VFP_NAN|VFP_INFINITY)) {
+		struct vfp_single *vsp = &vsd;
+
+		if (tm & VFP_NAN)
+			ret = vfp_propagate_nan(vsp, &vsm, NULL, fpscr);
+		else if (vsm.sign == 0) {
+ sqrt_copy:
+			vsp = &vsm;
+			ret = 0;
+		} else {
+ sqrt_invalid:
+			vsp = &vfp_single_default_qnan;
+			ret = FPSCR_IOC;
+		}
+		vfp_put_float(vfp_single_pack(vsp), sd);
+		return ret;
+	}
+
+	/*
+	 * sqrt(+/- 0) == +/- 0
+	 */
+	if (tm & VFP_ZERO)
+		goto sqrt_copy;
+
+	/*
+	 * Normalise a denormalised number
+	 */
+	if (tm & VFP_DENORMAL)
+		vfp_single_normalise_denormal(&vsm);
+
+	/*
+	 * sqrt(<0) = invalid
+	 */
+	if (vsm.sign)
+		goto sqrt_invalid;
+
+	vfp_single_dump("sqrt", &vsm);
+
+	/*
+	 * Estimate the square root.
+	 */
+	vsd.sign = 0;
+	vsd.exponent = ((vsm.exponent - 127) >> 1) + 127;
+	vsd.significand = vfp_estimate_sqrt_significand(vsm.exponent, vsm.significand) + 2;
+
+	vfp_single_dump("sqrt estimate", &vsd);
+
+	/*
+	 * And now adjust.
+	 */
+	if ((vsd.significand & VFP_SINGLE_LOW_BITS_MASK) <= 5) {
+		if (vsd.significand < 2) {
+			vsd.significand = 0xffffffff;
+		} else {
+			u64 term;
+			s64 rem;
+			vsm.significand <<= !(vsm.exponent & 1);
+			term = (u64)vsd.significand * vsd.significand;
+			rem = ((u64)vsm.significand << 32) - term;
+
+			pr_debug("VFP: term=%016llx rem=%016llx\n", term, rem);
+
+			while (rem < 0) {
+				vsd.significand -= 1;
+				rem += ((u64)vsd.significand << 1) | 1;
+			}
+			vsd.significand |= rem != 0;
+		}
+	}
+	vsd.significand = vfp_shiftright32jamming(vsd.significand, 1);
+
+	return vfp_single_normaliseround(sd, &vsd, fpscr, 0, "fsqrt");
+}
+
+/*
+ * Equal	:= ZC
+ * Less than	:= N
+ * Greater than	:= C
+ * Unordered	:= CV
+ */
+static u32 vfp_compare(int sd, int signal_on_qnan, s32 m, u32 fpscr)
+{
+	s32 d;
+	u32 ret = 0;
+
+	d = vfp_get_float(sd);
+	if (vfp_single_packed_exponent(m) == 255 && vfp_single_packed_mantissa(m)) {
+		ret |= FPSCR_C | FPSCR_V;
+		if (signal_on_qnan || !(vfp_single_packed_mantissa(m) & (1 << (VFP_SINGLE_MANTISSA_BITS - 1))))
+			/*
+			 * Signalling NaN, or signalling on quiet NaN
+			 */
+			ret |= FPSCR_IOC;
+	}
+
+	if (vfp_single_packed_exponent(d) == 255 && vfp_single_packed_mantissa(d)) {
+		ret |= FPSCR_C | FPSCR_V;
+		if (signal_on_qnan || !(vfp_single_packed_mantissa(d) & (1 << (VFP_SINGLE_MANTISSA_BITS - 1))))
+			/*
+			 * Signalling NaN, or signalling on quiet NaN
+			 */
+			ret |= FPSCR_IOC;
+	}
+
+	if (ret == 0) {
+		if (d == m || vfp_single_packed_abs(d | m) == 0) {
+			/*
+			 * equal
+			 */
+			ret |= FPSCR_Z | FPSCR_C;
+		} else if (vfp_single_packed_sign(d ^ m)) {
+			/*
+			 * different signs
+			 */
+			if (vfp_single_packed_sign(d))
+				/*
+				 * d is negative, so d < m
+				 */
+				ret |= FPSCR_N;
+			else
+				/*
+				 * d is positive, so d > m
+				 */
+				ret |= FPSCR_C;
+		} else if ((vfp_single_packed_sign(d) != 0) ^ (d < m)) {
+			/*
+			 * d < m
+			 */
+			ret |= FPSCR_N;
+		} else if ((vfp_single_packed_sign(d) != 0) ^ (d > m)) {
+			/*
+			 * d > m
+			 */
+			ret |= FPSCR_C;
+		}
+	}
+	return ret;
+}
+
+static u32 vfp_single_fcmp(int sd, int unused, s32 m, u32 fpscr)
+{
+	return vfp_compare(sd, 0, m, fpscr);
+}
+
+static u32 vfp_single_fcmpe(int sd, int unused, s32 m, u32 fpscr)
+{
+	return vfp_compare(sd, 1, m, fpscr);
+}
+
+static u32 vfp_single_fcmpz(int sd, int unused, s32 m, u32 fpscr)
+{
+	return vfp_compare(sd, 0, 0, fpscr);
+}
+
+static u32 vfp_single_fcmpez(int sd, int unused, s32 m, u32 fpscr)
+{
+	return vfp_compare(sd, 1, 0, fpscr);
+}
+
+static u32 vfp_single_fcvtd(int dd, int unused, s32 m, u32 fpscr)
+{
+	struct vfp_single vsm;
+	struct vfp_double vdd;
+	int tm;
+	u32 exceptions = 0;
+
+	vfp_single_unpack(&vsm, m);
+
+	tm = vfp_single_type(&vsm);
+
+	/*
+	 * If we have a signalling NaN, signal invalid operation.
+	 */
+	if (tm == VFP_SNAN)
+		exceptions = FPSCR_IOC;
+
+	if (tm & VFP_DENORMAL)
+		vfp_single_normalise_denormal(&vsm);
+
+	vdd.sign = vsm.sign;
+	vdd.significand = (u64)vsm.significand << 32;
+
+	/*
+	 * If we have an infinity or NaN, the exponent must be 2047.
+	 */
+	if (tm & (VFP_INFINITY|VFP_NAN)) {
+		vdd.exponent = 2047;
+		if (tm == VFP_QNAN)
+			vdd.significand |= VFP_DOUBLE_SIGNIFICAND_QNAN;
+		goto pack_nan;
+	} else if (tm & VFP_ZERO)
+		vdd.exponent = 0;
+	else
+		vdd.exponent = vsm.exponent + (1023 - 127);
+
+	return vfp_double_normaliseround(dd, &vdd, fpscr, exceptions, "fcvtd");
+
+ pack_nan:
+	vfp_put_double(vfp_double_pack(&vdd), dd);
+	return exceptions;
+}
+
+static u32 vfp_single_fuito(int sd, int unused, s32 m, u32 fpscr)
+{
+	struct vfp_single vs;
+
+	vs.sign = 0;
+	vs.exponent = 127 + 31 - 1;
+	vs.significand = (u32)m;
+
+	return vfp_single_normaliseround(sd, &vs, fpscr, 0, "fuito");
+}
+
+static u32 vfp_single_fsito(int sd, int unused, s32 m, u32 fpscr)
+{
+	struct vfp_single vs;
+
+	vs.sign = (m & 0x80000000) >> 16;
+	vs.exponent = 127 + 31 - 1;
+	vs.significand = vs.sign ? -m : m;
+
+	return vfp_single_normaliseround(sd, &vs, fpscr, 0, "fsito");
+}
+
+static u32 vfp_single_ftoui(int sd, int unused, s32 m, u32 fpscr)
+{
+	struct vfp_single vsm;
+	u32 d, exceptions = 0;
+	int rmode = fpscr & FPSCR_RMODE_MASK;
+	int tm;
+
+	vfp_single_unpack(&vsm, m);
+	vfp_single_dump("VSM", &vsm);
+
+	/*
+	 * Do we have a denormalised number?
+	 */
+	tm = vfp_single_type(&vsm);
+	if (tm & VFP_DENORMAL)
+		exceptions |= FPSCR_IDC;
+
+	if (tm & VFP_NAN)
+		vsm.sign = 0;
+
+	if (vsm.exponent >= 127 + 32) {
+		d = vsm.sign ? 0 : 0xffffffff;
+		exceptions = FPSCR_IOC;
+	} else if (vsm.exponent >= 127 - 1) {
+		int shift = 127 + 31 - vsm.exponent;
+		u32 rem, incr = 0;
+
+		/*
+		 * 2^0 <= m < 2^32-2^8
+		 */
+		d = (vsm.significand << 1) >> shift;
+		rem = vsm.significand << (33 - shift);
+
+		if (rmode == FPSCR_ROUND_NEAREST) {
+			incr = 0x80000000;
+			if ((d & 1) == 0)
+				incr -= 1;
+		} else if (rmode == FPSCR_ROUND_TOZERO) {
+			incr = 0;
+		} else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vsm.sign != 0)) {
+			incr = ~0;
+		}
+
+		if ((rem + incr) < rem) {
+			if (d < 0xffffffff)
+				d += 1;
+			else
+				exceptions |= FPSCR_IOC;
+		}
+
+		if (d && vsm.sign) {
+			d = 0;
+			exceptions |= FPSCR_IOC;
+		} else if (rem)
+			exceptions |= FPSCR_IXC;
+	} else {
+		d = 0;
+		if (vsm.exponent | vsm.significand) {
+			exceptions |= FPSCR_IXC;
+			if (rmode == FPSCR_ROUND_PLUSINF && vsm.sign == 0)
+				d = 1;
+			else if (rmode == FPSCR_ROUND_MINUSINF && vsm.sign) {
+				d = 0;
+				exceptions |= FPSCR_IOC;
+			}
+		}
+	}
+
+	pr_debug("VFP: ftoui: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
+
+	vfp_put_float(d, sd);
+
+	return exceptions;
+}
+
+static u32 vfp_single_ftouiz(int sd, int unused, s32 m, u32 fpscr)
+{
+	return vfp_single_ftoui(sd, unused, m, FPSCR_ROUND_TOZERO);
+}
+
+static u32 vfp_single_ftosi(int sd, int unused, s32 m, u32 fpscr)
+{
+	struct vfp_single vsm;
+	u32 d, exceptions = 0;
+	int rmode = fpscr & FPSCR_RMODE_MASK;
+	int tm;
+
+	vfp_single_unpack(&vsm, m);
+	vfp_single_dump("VSM", &vsm);
+
+	/*
+	 * Do we have a denormalised number?
+	 */
+	tm = vfp_single_type(&vsm);
+	if (vfp_single_type(&vsm) & VFP_DENORMAL)
+		exceptions |= FPSCR_IDC;
+
+	if (tm & VFP_NAN) {
+		d = 0;
+		exceptions |= FPSCR_IOC;
+	} else if (vsm.exponent >= 127 + 32) {
+		/*
+		 * m >= 2^31-2^7: invalid
+		 */
+		d = 0x7fffffff;
+		if (vsm.sign)
+			d = ~d;
+		exceptions |= FPSCR_IOC;
+	} else if (vsm.exponent >= 127 - 1) {
+		int shift = 127 + 31 - vsm.exponent;
+		u32 rem, incr = 0;
+
+		/* 2^0 <= m <= 2^31-2^7 */
+		d = (vsm.significand << 1) >> shift;
+		rem = vsm.significand << (33 - shift);
+
+		if (rmode == FPSCR_ROUND_NEAREST) {
+			incr = 0x80000000;
+			if ((d & 1) == 0)
+				incr -= 1;
+		} else if (rmode == FPSCR_ROUND_TOZERO) {
+			incr = 0;
+		} else if ((rmode == FPSCR_ROUND_PLUSINF) ^ (vsm.sign != 0)) {
+			incr = ~0;
+		}
+
+		if ((rem + incr) < rem && d < 0xffffffff)
+			d += 1;
+		if (d > 0x7fffffff + (vsm.sign != 0)) {
+			d = 0x7fffffff + (vsm.sign != 0);
+			exceptions |= FPSCR_IOC;
+		} else if (rem)
+			exceptions |= FPSCR_IXC;
+
+		if (vsm.sign)
+			d = -d;
+	} else {
+		d = 0;
+		if (vsm.exponent | vsm.significand) {
+			exceptions |= FPSCR_IXC;
+			if (rmode == FPSCR_ROUND_PLUSINF && vsm.sign == 0)
+				d = 1;
+			else if (rmode == FPSCR_ROUND_MINUSINF && vsm.sign)
+				d = -1;
+		}
+	}
+
+	pr_debug("VFP: ftosi: d(s%d)=%08x exceptions=%08x\n", sd, d, exceptions);
+
+	vfp_put_float((s32)d, sd);
+
+	return exceptions;
+}
+
+static u32 vfp_single_ftosiz(int sd, int unused, s32 m, u32 fpscr)
+{
+	return vfp_single_ftosi(sd, unused, m, FPSCR_ROUND_TOZERO);
+}
+
+static struct op fops_ext[32] = {
+	[FEXT_TO_IDX(FEXT_FCPY)]	= { vfp_single_fcpy,   0 },
+	[FEXT_TO_IDX(FEXT_FABS)]	= { vfp_single_fabs,   0 },
+	[FEXT_TO_IDX(FEXT_FNEG)]	= { vfp_single_fneg,   0 },
+	[FEXT_TO_IDX(FEXT_FSQRT)]	= { vfp_single_fsqrt,  0 },
+	[FEXT_TO_IDX(FEXT_FCMP)]	= { vfp_single_fcmp,   OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCMPE)]	= { vfp_single_fcmpe,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCMPZ)]	= { vfp_single_fcmpz,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCMPEZ)]	= { vfp_single_fcmpez, OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FCVT)]	= { vfp_single_fcvtd,  OP_SCALAR|OP_DD },
+	[FEXT_TO_IDX(FEXT_FUITO)]	= { vfp_single_fuito,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FSITO)]	= { vfp_single_fsito,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FTOUI)]	= { vfp_single_ftoui,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FTOUIZ)]	= { vfp_single_ftouiz, OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FTOSI)]	= { vfp_single_ftosi,  OP_SCALAR },
+	[FEXT_TO_IDX(FEXT_FTOSIZ)]	= { vfp_single_ftosiz, OP_SCALAR },
+};
+
+
+
+
+
+static u32
+vfp_single_fadd_nonnumber(struct vfp_single *vsd, struct vfp_single *vsn,
+			  struct vfp_single *vsm, u32 fpscr)
+{
+	struct vfp_single *vsp;
+	u32 exceptions = 0;
+	int tn, tm;
+
+	tn = vfp_single_type(vsn);
+	tm = vfp_single_type(vsm);
+
+	if (tn & tm & VFP_INFINITY) {
+		/*
+		 * Two infinities.  Are they different signs?
+		 */
+		if (vsn->sign ^ vsm->sign) {
+			/*
+			 * different signs -> invalid
+			 */
+			exceptions = FPSCR_IOC;
+			vsp = &vfp_single_default_qnan;
+		} else {
+			/*
+			 * same signs -> valid
+			 */
+			vsp = vsn;
+		}
+	} else if (tn & VFP_INFINITY && tm & VFP_NUMBER) {
+		/*
+		 * One infinity and one number -> infinity
+		 */
+		vsp = vsn;
+	} else {
+		/*
+		 * 'n' is a NaN of some type
+		 */
+		return vfp_propagate_nan(vsd, vsn, vsm, fpscr);
+	}
+	*vsd = *vsp;
+	return exceptions;
+}
+
+static u32
+vfp_single_add(struct vfp_single *vsd, struct vfp_single *vsn,
+	       struct vfp_single *vsm, u32 fpscr)
+{
+	u32 exp_diff, m_sig;
+
+	if (vsn->significand & 0x80000000 ||
+	    vsm->significand & 0x80000000) {
+		pr_info("VFP: bad FP values in %s\n", __func__);
+		vfp_single_dump("VSN", vsn);
+		vfp_single_dump("VSM", vsm);
+	}
+
+	/*
+	 * Ensure that 'n' is the largest magnitude number.  Note that
+	 * if 'n' and 'm' have equal exponents, we do not swap them.
+	 * This ensures that NaN propagation works correctly.
+	 */
+	if (vsn->exponent < vsm->exponent) {
+		struct vfp_single *t = vsn;
+		vsn = vsm;
+		vsm = t;
+	}
+
+	/*
+	 * Is 'n' an infinity or a NaN?  Note that 'm' may be a number,
+	 * infinity or a NaN here.
+	 */
+	if (vsn->exponent == 255)
+		return vfp_single_fadd_nonnumber(vsd, vsn, vsm, fpscr);
+
+	/*
+	 * We have two proper numbers, where 'vsn' is the larger magnitude.
+	 *
+	 * Copy 'n' to 'd' before doing the arithmetic.
+	 */
+	*vsd = *vsn;
+
+	/*
+	 * Align both numbers.
+	 */
+	exp_diff = vsn->exponent - vsm->exponent;
+	m_sig = vfp_shiftright32jamming(vsm->significand, exp_diff);
+
+	/*
+	 * If the signs are different, we are really subtracting.
+	 */
+	if (vsn->sign ^ vsm->sign) {
+		m_sig = vsn->significand - m_sig;
+		if ((s32)m_sig < 0) {
+			vsd->sign = vfp_sign_negate(vsd->sign);
+			m_sig = -m_sig;
+		} else if (m_sig == 0) {
+			vsd->sign = (fpscr & FPSCR_RMODE_MASK) ==
+				      FPSCR_ROUND_MINUSINF ? 0x8000 : 0;
+		}
+	} else {
+		m_sig = vsn->significand + m_sig;
+	}
+	vsd->significand = m_sig;
+
+	return 0;
+}
+
+static u32
+vfp_single_multiply(struct vfp_single *vsd, struct vfp_single *vsn, struct vfp_single *vsm, u32 fpscr)
+{
+	vfp_single_dump("VSN", vsn);
+	vfp_single_dump("VSM", vsm);
+
+	/*
+	 * Ensure that 'n' is the largest magnitude number.  Note that
+	 * if 'n' and 'm' have equal exponents, we do not swap them.
+	 * This ensures that NaN propagation works correctly.
+	 */
+	if (vsn->exponent < vsm->exponent) {
+		struct vfp_single *t = vsn;
+		vsn = vsm;
+		vsm = t;
+		pr_debug("VFP: swapping M <-> N\n");
+	}
+
+	vsd->sign = vsn->sign ^ vsm->sign;
+
+	/*
+	 * If 'n' is an infinity or NaN, handle it.  'm' may be anything.
+	 */
+	if (vsn->exponent == 255) {
+		if (vsn->significand || (vsm->exponent == 255 && vsm->significand))
+			return vfp_propagate_nan(vsd, vsn, vsm, fpscr);
+		if ((vsm->exponent | vsm->significand) == 0) {
+			*vsd = vfp_single_default_qnan;
+			return FPSCR_IOC;
+		}
+		vsd->exponent = vsn->exponent;
+		vsd->significand = 0;
+		return 0;
+	}
+
+	/*
+	 * If 'm' is zero, the result is always zero.  In this case,
+	 * 'n' may be zero or a number, but it doesn't matter which.
+	 */
+	if ((vsm->exponent | vsm->significand) == 0) {
+		vsd->exponent = 0;
+		vsd->significand = 0;
+		return 0;
+	}
+
+	/*
+	 * We add 2 to the destination exponent for the same reason as
+	 * the addition case - though this time we have +1 from each
+	 * input operand.
+	 */
+	vsd->exponent = vsn->exponent + vsm->exponent - 127 + 2;
+	vsd->significand = vfp_hi64to32jamming((u64)vsn->significand * vsm->significand);
+
+	vfp_single_dump("VSD", vsd);
+	return 0;
+}
+
+#define NEG_MULTIPLY	(1 << 0)
+#define NEG_SUBTRACT	(1 << 1)
+
+static u32
+vfp_single_multiply_accumulate(int sd, int sn, s32 m, u32 fpscr, u32 negate, char *func)
+{
+	struct vfp_single vsd, vsp, vsn, vsm;
+	u32 exceptions;
+	s32 v;
+
+	v = vfp_get_float(sn);
+	pr_debug("VFP: s%u = %08x\n", sn, v);
+	vfp_single_unpack(&vsn, v);
+	if (vsn.exponent == 0 && vsn.significand)
+		vfp_single_normalise_denormal(&vsn);
+
+	vfp_single_unpack(&vsm, m);
+	if (vsm.exponent == 0 && vsm.significand)
+		vfp_single_normalise_denormal(&vsm);
+
+	exceptions = vfp_single_multiply(&vsp, &vsn, &vsm, fpscr);
+	if (negate & NEG_MULTIPLY)
+		vsp.sign = vfp_sign_negate(vsp.sign);
+
+	v = vfp_get_float(sd);
+	pr_debug("VFP: s%u = %08x\n", sd, v);
+	vfp_single_unpack(&vsn, v);
+	if (vsn.exponent == 0 && vsn.significand)
+		vfp_single_normalise_denormal(&vsn);
+	if (negate & NEG_SUBTRACT)
+		vsn.sign = vfp_sign_negate(vsn.sign);
+
+	exceptions |= vfp_single_add(&vsd, &vsn, &vsp, fpscr);
+
+	return vfp_single_normaliseround(sd, &vsd, fpscr, exceptions, func);
+}
+
+/*
+ * Standard operations
+ */
+
+/*
+ * sd = sd + (sn * sm)
+ */
+static u32 vfp_single_fmac(int sd, int sn, s32 m, u32 fpscr)
+{
+	return vfp_single_multiply_accumulate(sd, sn, m, fpscr, 0, "fmac");
+}
+
+/*
+ * sd = sd - (sn * sm)
+ */
+static u32 vfp_single_fnmac(int sd, int sn, s32 m, u32 fpscr)
+{
+	return vfp_single_multiply_accumulate(sd, sn, m, fpscr, NEG_MULTIPLY, "fnmac");
+}
+
+/*
+ * sd = -sd + (sn * sm)
+ */
+static u32 vfp_single_fmsc(int sd, int sn, s32 m, u32 fpscr)
+{
+	return vfp_single_multiply_accumulate(sd, sn, m, fpscr, NEG_SUBTRACT, "fmsc");
+}
+
+/*
+ * sd = -sd - (sn * sm)
+ */
+static u32 vfp_single_fnmsc(int sd, int sn, s32 m, u32 fpscr)
+{
+	return vfp_single_multiply_accumulate(sd, sn, m, fpscr, NEG_SUBTRACT | NEG_MULTIPLY, "fnmsc");
+}
+
+/*
+ * sd = sn * sm
+ */
+static u32 vfp_single_fmul(int sd, int sn, s32 m, u32 fpscr)
+{
+	struct vfp_single vsd, vsn, vsm;
+	u32 exceptions;
+	s32 n = vfp_get_float(sn);
+
+	pr_debug("VFP: s%u = %08x\n", sn, n);
+
+	vfp_single_unpack(&vsn, n);
+	if (vsn.exponent == 0 && vsn.significand)
+		vfp_single_normalise_denormal(&vsn);
+
+	vfp_single_unpack(&vsm, m);
+	if (vsm.exponent == 0 && vsm.significand)
+		vfp_single_normalise_denormal(&vsm);
+
+	exceptions = vfp_single_multiply(&vsd, &vsn, &vsm, fpscr);
+	return vfp_single_normaliseround(sd, &vsd, fpscr, exceptions, "fmul");
+}
+
+/*
+ * sd = -(sn * sm)
+ */
+static u32 vfp_single_fnmul(int sd, int sn, s32 m, u32 fpscr)
+{
+	struct vfp_single vsd, vsn, vsm;
+	u32 exceptions;
+	s32 n = vfp_get_float(sn);
+
+	pr_debug("VFP: s%u = %08x\n", sn, n);
+
+	vfp_single_unpack(&vsn, n);
+	if (vsn.exponent == 0 && vsn.significand)
+		vfp_single_normalise_denormal(&vsn);
+
+	vfp_single_unpack(&vsm, m);
+	if (vsm.exponent == 0 && vsm.significand)
+		vfp_single_normalise_denormal(&vsm);
+
+	exceptions = vfp_single_multiply(&vsd, &vsn, &vsm, fpscr);
+	vsd.sign = vfp_sign_negate(vsd.sign);
+	return vfp_single_normaliseround(sd, &vsd, fpscr, exceptions, "fnmul");
+}
+
+/*
+ * sd = sn + sm
+ */
+static u32 vfp_single_fadd(int sd, int sn, s32 m, u32 fpscr)
+{
+	struct vfp_single vsd, vsn, vsm;
+	u32 exceptions;
+	s32 n = vfp_get_float(sn);
+
+	pr_debug("VFP: s%u = %08x\n", sn, n);
+
+	/*
+	 * Unpack and normalise denormals.
+	 */
+	vfp_single_unpack(&vsn, n);
+	if (vsn.exponent == 0 && vsn.significand)
+		vfp_single_normalise_denormal(&vsn);
+
+	vfp_single_unpack(&vsm, m);
+	if (vsm.exponent == 0 && vsm.significand)
+		vfp_single_normalise_denormal(&vsm);
+
+	exceptions = vfp_single_add(&vsd, &vsn, &vsm, fpscr);
+
+	return vfp_single_normaliseround(sd, &vsd, fpscr, exceptions, "fadd");
+}
+
+/*
+ * sd = sn - sm
+ */
+static u32 vfp_single_fsub(int sd, int sn, s32 m, u32 fpscr)
+{
+	/*
+	 * Subtraction is addition with one sign inverted.
+	 */
+	return vfp_single_fadd(sd, sn, vfp_single_packed_negate(m), fpscr);
+}
+
+/*
+ * sd = sn / sm
+ */
+static u32 vfp_single_fdiv(int sd, int sn, s32 m, u32 fpscr)
+{
+	struct vfp_single vsd, vsn, vsm;
+	u32 exceptions = 0;
+	s32 n = vfp_get_float(sn);
+	int tm, tn;
+
+	pr_debug("VFP: s%u = %08x\n", sn, n);
+
+	vfp_single_unpack(&vsn, n);
+	vfp_single_unpack(&vsm, m);
+
+	vsd.sign = vsn.sign ^ vsm.sign;
+
+	tn = vfp_single_type(&vsn);
+	tm = vfp_single_type(&vsm);
+
+	/*
+	 * Is n a NAN?
+	 */
+	if (tn & VFP_NAN)
+		goto vsn_nan;
+
+	/*
+	 * Is m a NAN?
+	 */
+	if (tm & VFP_NAN)
+		goto vsm_nan;
+
+	/*
+	 * If n and m are infinity, the result is invalid
+	 * If n and m are zero, the result is invalid
+	 */
+	if (tm & tn & (VFP_INFINITY|VFP_ZERO))
+		goto invalid;
+
+	/*
+	 * If n is infinity, the result is infinity
+	 */
+	if (tn & VFP_INFINITY)
+		goto infinity;
+
+	/*
+	 * If m is zero, raise div0 exception
+	 */
+	if (tm & VFP_ZERO)
+		goto divzero;
+
+	/*
+	 * If m is infinity, or n is zero, the result is zero
+	 */
+	if (tm & VFP_INFINITY || tn & VFP_ZERO)
+		goto zero;
+
+	if (tn & VFP_DENORMAL)
+		vfp_single_normalise_denormal(&vsn);
+	if (tm & VFP_DENORMAL)
+		vfp_single_normalise_denormal(&vsm);
+
+	/*
+	 * Ok, we have two numbers, we can perform division.
+	 */
+	vsd.exponent = vsn.exponent - vsm.exponent + 127 - 1;
+	vsm.significand <<= 1;
+	if (vsm.significand <= (2 * vsn.significand)) {
+		vsn.significand >>= 1;
+		vsd.exponent++;
+	}
+	{
+		u64 significand = (u64)vsn.significand << 32;
+		do_div(significand, vsm.significand);
+		vsd.significand = significand;
+	}
+	if ((vsd.significand & 0x3f) == 0)
+		vsd.significand |= ((u64)vsm.significand * vsd.significand != (u64)vsn.significand << 32);
+
+	return vfp_single_normaliseround(sd, &vsd, fpscr, 0, "fdiv");
+
+ vsn_nan:
+	exceptions = vfp_propagate_nan(&vsd, &vsn, &vsm, fpscr);
+ pack:
+	vfp_put_float(vfp_single_pack(&vsd), sd);
+	return exceptions;
+
+ vsm_nan:
+	exceptions = vfp_propagate_nan(&vsd, &vsm, &vsn, fpscr);
+	goto pack;
+
+ zero:
+	vsd.exponent = 0;
+	vsd.significand = 0;
+	goto pack;
+
+ divzero:
+	exceptions = FPSCR_DZC;
+ infinity:
+	vsd.exponent = 255;
+	vsd.significand = 0;
+	goto pack;
+
+ invalid:
+	vfp_put_float(vfp_single_pack(&vfp_single_default_qnan), sd);
+	return FPSCR_IOC;
+}
+
+static struct op fops[16] = {
+	[FOP_TO_IDX(FOP_FMAC)]	= { vfp_single_fmac,  0 },
+	[FOP_TO_IDX(FOP_FNMAC)]	= { vfp_single_fnmac, 0 },
+	[FOP_TO_IDX(FOP_FMSC)]	= { vfp_single_fmsc,  0 },
+	[FOP_TO_IDX(FOP_FNMSC)]	= { vfp_single_fnmsc, 0 },
+	[FOP_TO_IDX(FOP_FMUL)]	= { vfp_single_fmul,  0 },
+	[FOP_TO_IDX(FOP_FNMUL)]	= { vfp_single_fnmul, 0 },
+	[FOP_TO_IDX(FOP_FADD)]	= { vfp_single_fadd,  0 },
+	[FOP_TO_IDX(FOP_FSUB)]	= { vfp_single_fsub,  0 },
+	[FOP_TO_IDX(FOP_FDIV)]	= { vfp_single_fdiv,  0 },
+};
+
+#define FREG_BANK(x)	((x) & 0x18)
+#define FREG_IDX(x)	((x) & 7)
+
+u32 vfp_single_cpdo(u32 inst, u32 fpscr)
+{
+	u32 op = inst & FOP_MASK;
+	u32 exceptions = 0;
+	unsigned int dest;
+	unsigned int sn = vfp_get_sn(inst);
+	unsigned int sm = vfp_get_sm(inst);
+	unsigned int vecitr, veclen, vecstride;
+	struct op *fop;
+
+	vecstride = 1 + ((fpscr & FPSCR_STRIDE_MASK) == FPSCR_STRIDE_MASK);
+
+	fop = (op == FOP_EXT) ? &fops_ext[FEXT_TO_IDX(inst)] : &fops[FOP_TO_IDX(op)];
+
+	/*
+	 * fcvtsd takes a dN register number as destination, not sN.
+	 * Technically, if bit 0 of dd is set, this is an invalid
+	 * instruction.  However, we ignore this for efficiency.
+	 * It also only operates on scalars.
+	 */
+	if (fop->flags & OP_DD)
+		dest = vfp_get_dd(inst);
+	else
+		dest = vfp_get_sd(inst);
+
+	/*
+	 * If destination bank is zero, vector length is always '1'.
+	 * ARM DDI0100F C5.1.3, C5.3.2.
+	 */
+	if ((fop->flags & OP_SCALAR) || FREG_BANK(dest) == 0)
+		veclen = 0;
+	else
+		veclen = fpscr & FPSCR_LENGTH_MASK;
+
+	pr_debug("VFP: vecstride=%u veclen=%u\n", vecstride,
+		 (veclen >> FPSCR_LENGTH_BIT) + 1);
+
+	if (!fop->fn)
+		goto invalid;
+
+	for (vecitr = 0; vecitr <= veclen; vecitr += 1 << FPSCR_LENGTH_BIT) {
+		s32 m = vfp_get_float(sm);
+		u32 except;
+		char type;
+
+		type = fop->flags & OP_DD ? 'd' : 's';
+		if (op == FOP_EXT)
+			pr_debug("VFP: itr%d (%c%u) = op[%u] (s%u=%08x)\n",
+				 vecitr >> FPSCR_LENGTH_BIT, type, dest, sn,
+				 sm, m);
+		else
+			pr_debug("VFP: itr%d (%c%u) = (s%u) op[%u] (s%u=%08x)\n",
+				 vecitr >> FPSCR_LENGTH_BIT, type, dest, sn,
+				 FOP_TO_IDX(op), sm, m);
+
+		except = fop->fn(dest, sn, m, fpscr);
+		pr_debug("VFP: itr%d: exceptions=%08x\n",
+			 vecitr >> FPSCR_LENGTH_BIT, except);
+
+		exceptions |= except;
+
+		/*
+		 * CHECK: It appears to be undefined whether we stop when
+		 * we encounter an exception.  We continue.
+		 */
+		dest = FREG_BANK(dest) + ((FREG_IDX(dest) + vecstride) & 7);
+		sn = FREG_BANK(sn) + ((FREG_IDX(sn) + vecstride) & 7);
+		if (FREG_BANK(sm) != 0)
+			sm = FREG_BANK(sm) + ((FREG_IDX(sm) + vecstride) & 7);
+	}
+	return exceptions;
+
+ invalid:
+	return (u32)-1;
+}