Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 379 insertions, 0 deletions

diff --git a/arch/x86/math-emu/poly_sin.c b/arch/x86/math-emu/poly_sin.c
new file mode 100644
index 000000000..c192fba51
--- /dev/null
+++ b/arch/x86/math-emu/poly_sin.c
@@ -0,0 +1,379 @@
+// SPDX-License-Identifier: GPL-2.0
+/*---------------------------------------------------------------------------+
+ |  poly_sin.c                                                               |
+ |                                                                           |
+ |  Computation of an approximation of the sin function and the cosine       |
+ |  function by a polynomial.                                                |
+ |                                                                           |
+ | Copyright (C) 1992,1993,1994,1997,1999                                    |
+ |                  W. Metzenthen, 22 Parker St, Ormond, Vic 3163, Australia |
+ |                  E-mail   billm@melbpc.org.au                             |
+ |                                                                           |
+ |                                                                           |
+ +---------------------------------------------------------------------------*/
+
+#include "exception.h"
+#include "reg_constant.h"
+#include "fpu_emu.h"
+#include "fpu_system.h"
+#include "control_w.h"
+#include "poly.h"
+
+#define	N_COEFF_P	4
+#define	N_COEFF_N	4
+
+static const unsigned long long pos_terms_l[N_COEFF_P] = {
+	0xaaaaaaaaaaaaaaabLL,
+	0x00d00d00d00cf906LL,
+	0x000006b99159a8bbLL,
+	0x000000000d7392e6LL
+};
+
+static const unsigned long long neg_terms_l[N_COEFF_N] = {
+	0x2222222222222167LL,
+	0x0002e3bc74aab624LL,
+	0x0000000b09229062LL,
+	0x00000000000c7973LL
+};
+
+#define	N_COEFF_PH	4
+#define	N_COEFF_NH	4
+static const unsigned long long pos_terms_h[N_COEFF_PH] = {
+	0x0000000000000000LL,
+	0x05b05b05b05b0406LL,
+	0x000049f93edd91a9LL,
+	0x00000000c9c9ed62LL
+};
+
+static const unsigned long long neg_terms_h[N_COEFF_NH] = {
+	0xaaaaaaaaaaaaaa98LL,
+	0x001a01a01a019064LL,
+	0x0000008f76c68a77LL,
+	0x0000000000d58f5eLL
+};
+
+/*--- poly_sine() -----------------------------------------------------------+
+ |                                                                           |
+ +---------------------------------------------------------------------------*/
+void poly_sine(FPU_REG *st0_ptr)
+{
+	int exponent, echange;
+	Xsig accumulator, argSqrd, argTo4;
+	unsigned long fix_up, adj;
+	unsigned long long fixed_arg;
+	FPU_REG result;
+
+	exponent = exponent(st0_ptr);
+
+	accumulator.lsw = accumulator.midw = accumulator.msw = 0;
+
+	/* Split into two ranges, for arguments below and above 1.0 */
+	/* The boundary between upper and lower is approx 0.88309101259 */
+	if ((exponent < -1)
+	    || ((exponent == -1) && (st0_ptr->sigh <= 0xe21240aa))) {
+		/* The argument is <= 0.88309101259 */
+
+		argSqrd.msw = st0_ptr->sigh;
+		argSqrd.midw = st0_ptr->sigl;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &significand(st0_ptr));
+		shr_Xsig(&argSqrd, 2 * (-1 - exponent));
+		argTo4.msw = argSqrd.msw;
+		argTo4.midw = argSqrd.midw;
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_l,
+				N_COEFF_N - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_l,
+				N_COEFF_P - 1);
+
+		shr_Xsig(&accumulator, 2);	/* Divide by four */
+		accumulator.msw |= 0x80000000;	/* Add 1.0 */
+
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+
+		/* Divide by four, FPU_REG compatible, etc */
+		exponent = 3 * exponent;
+
+		/* The minimum exponent difference is 3 */
+		shr_Xsig(&accumulator, exponent(st0_ptr) - exponent);
+
+		negate_Xsig(&accumulator);
+		XSIG_LL(accumulator) += significand(st0_ptr);
+
+		echange = round_Xsig(&accumulator);
+
+		setexponentpos(&result, exponent(st0_ptr) + echange);
+	} else {
+		/* The argument is > 0.88309101259 */
+		/* We use sin(st(0)) = cos(pi/2-st(0)) */
+
+		fixed_arg = significand(st0_ptr);
+
+		if (exponent == 0) {
+			/* The argument is >= 1.0 */
+
+			/* Put the binary point at the left. */
+			fixed_arg <<= 1;
+		}
+		/* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
+		fixed_arg = 0x921fb54442d18469LL - fixed_arg;
+		/* There is a special case which arises due to rounding, to fix here. */
+		if (fixed_arg == 0xffffffffffffffffLL)
+			fixed_arg = 0;
+
+		XSIG_LL(argSqrd) = fixed_arg;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &fixed_arg);
+
+		XSIG_LL(argTo4) = XSIG_LL(argSqrd);
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_h,
+				N_COEFF_NH - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_h,
+				N_COEFF_PH - 1);
+		negate_Xsig(&accumulator);
+
+		mul64_Xsig(&accumulator, &fixed_arg);
+		mul64_Xsig(&accumulator, &fixed_arg);
+
+		shr_Xsig(&accumulator, 3);
+		negate_Xsig(&accumulator);
+
+		add_Xsig_Xsig(&accumulator, &argSqrd);
+
+		shr_Xsig(&accumulator, 1);
+
+		accumulator.lsw |= 1;	/* A zero accumulator here would cause problems */
+		negate_Xsig(&accumulator);
+
+		/* The basic computation is complete. Now fix the answer to
+		   compensate for the error due to the approximation used for
+		   pi/2
+		 */
+
+		/* This has an exponent of -65 */
+		fix_up = 0x898cc517;
+		/* The fix-up needs to be improved for larger args */
+		if (argSqrd.msw & 0xffc00000) {
+			/* Get about 32 bit precision in these: */
+			fix_up -= mul_32_32(0x898cc517, argSqrd.msw) / 6;
+		}
+		fix_up = mul_32_32(fix_up, LL_MSW(fixed_arg));
+
+		adj = accumulator.lsw;	/* temp save */
+		accumulator.lsw -= fix_up;
+		if (accumulator.lsw > adj)
+			XSIG_LL(accumulator)--;
+
+		echange = round_Xsig(&accumulator);
+
+		setexponentpos(&result, echange - 1);
+	}
+
+	significand(&result) = XSIG_LL(accumulator);
+	setsign(&result, getsign(st0_ptr));
+	FPU_copy_to_reg0(&result, TAG_Valid);
+
+#ifdef PARANOID
+	if ((exponent(&result) >= 0)
+	    && (significand(&result) > 0x8000000000000000LL)) {
+		EXCEPTION(EX_INTERNAL | 0x150);
+	}
+#endif /* PARANOID */
+
+}
+
+/*--- poly_cos() ------------------------------------------------------------+
+ |                                                                           |
+ +---------------------------------------------------------------------------*/
+void poly_cos(FPU_REG *st0_ptr)
+{
+	FPU_REG result;
+	long int exponent, exp2, echange;
+	Xsig accumulator, argSqrd, fix_up, argTo4;
+	unsigned long long fixed_arg;
+
+#ifdef PARANOID
+	if ((exponent(st0_ptr) > 0)
+	    || ((exponent(st0_ptr) == 0)
+		&& (significand(st0_ptr) > 0xc90fdaa22168c234LL))) {
+		EXCEPTION(EX_Invalid);
+		FPU_copy_to_reg0(&CONST_QNaN, TAG_Special);
+		return;
+	}
+#endif /* PARANOID */
+
+	exponent = exponent(st0_ptr);
+
+	accumulator.lsw = accumulator.midw = accumulator.msw = 0;
+
+	if ((exponent < -1)
+	    || ((exponent == -1) && (st0_ptr->sigh <= 0xb00d6f54))) {
+		/* arg is < 0.687705 */
+
+		argSqrd.msw = st0_ptr->sigh;
+		argSqrd.midw = st0_ptr->sigl;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &significand(st0_ptr));
+
+		if (exponent < -1) {
+			/* shift the argument right by the required places */
+			shr_Xsig(&argSqrd, 2 * (-1 - exponent));
+		}
+
+		argTo4.msw = argSqrd.msw;
+		argTo4.midw = argSqrd.midw;
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_h,
+				N_COEFF_NH - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_h,
+				N_COEFF_PH - 1);
+		negate_Xsig(&accumulator);
+
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		mul64_Xsig(&accumulator, &significand(st0_ptr));
+		shr_Xsig(&accumulator, -2 * (1 + exponent));
+
+		shr_Xsig(&accumulator, 3);
+		negate_Xsig(&accumulator);
+
+		add_Xsig_Xsig(&accumulator, &argSqrd);
+
+		shr_Xsig(&accumulator, 1);
+
+		/* It doesn't matter if accumulator is all zero here, the
+		   following code will work ok */
+		negate_Xsig(&accumulator);
+
+		if (accumulator.lsw & 0x80000000)
+			XSIG_LL(accumulator)++;
+		if (accumulator.msw == 0) {
+			/* The result is 1.0 */
+			FPU_copy_to_reg0(&CONST_1, TAG_Valid);
+			return;
+		} else {
+			significand(&result) = XSIG_LL(accumulator);
+
+			/* will be a valid positive nr with expon = -1 */
+			setexponentpos(&result, -1);
+		}
+	} else {
+		fixed_arg = significand(st0_ptr);
+
+		if (exponent == 0) {
+			/* The argument is >= 1.0 */
+
+			/* Put the binary point at the left. */
+			fixed_arg <<= 1;
+		}
+		/* pi/2 in hex is: 1.921fb54442d18469 898CC51701B839A2 52049C1 */
+		fixed_arg = 0x921fb54442d18469LL - fixed_arg;
+		/* There is a special case which arises due to rounding, to fix here. */
+		if (fixed_arg == 0xffffffffffffffffLL)
+			fixed_arg = 0;
+
+		exponent = -1;
+		exp2 = -1;
+
+		/* A shift is needed here only for a narrow range of arguments,
+		   i.e. for fixed_arg approx 2^-32, but we pick up more... */
+		if (!(LL_MSW(fixed_arg) & 0xffff0000)) {
+			fixed_arg <<= 16;
+			exponent -= 16;
+			exp2 -= 16;
+		}
+
+		XSIG_LL(argSqrd) = fixed_arg;
+		argSqrd.lsw = 0;
+		mul64_Xsig(&argSqrd, &fixed_arg);
+
+		if (exponent < -1) {
+			/* shift the argument right by the required places */
+			shr_Xsig(&argSqrd, 2 * (-1 - exponent));
+		}
+
+		argTo4.msw = argSqrd.msw;
+		argTo4.midw = argSqrd.midw;
+		argTo4.lsw = argSqrd.lsw;
+		mul_Xsig_Xsig(&argTo4, &argTo4);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), neg_terms_l,
+				N_COEFF_N - 1);
+		mul_Xsig_Xsig(&accumulator, &argSqrd);
+		negate_Xsig(&accumulator);
+
+		polynomial_Xsig(&accumulator, &XSIG_LL(argTo4), pos_terms_l,
+				N_COEFF_P - 1);
+
+		shr_Xsig(&accumulator, 2);	/* Divide by four */
+		accumulator.msw |= 0x80000000;	/* Add 1.0 */
+
+		mul64_Xsig(&accumulator, &fixed_arg);
+		mul64_Xsig(&accumulator, &fixed_arg);
+		mul64_Xsig(&accumulator, &fixed_arg);
+
+		/* Divide by four, FPU_REG compatible, etc */
+		exponent = 3 * exponent;
+
+		/* The minimum exponent difference is 3 */
+		shr_Xsig(&accumulator, exp2 - exponent);
+
+		negate_Xsig(&accumulator);
+		XSIG_LL(accumulator) += fixed_arg;
+
+		/* The basic computation is complete. Now fix the answer to
+		   compensate for the error due to the approximation used for
+		   pi/2
+		 */
+
+		/* This has an exponent of -65 */
+		XSIG_LL(fix_up) = 0x898cc51701b839a2ll;
+		fix_up.lsw = 0;
+
+		/* The fix-up needs to be improved for larger args */
+		if (argSqrd.msw & 0xffc00000) {
+			/* Get about 32 bit precision in these: */
+			fix_up.msw -= mul_32_32(0x898cc517, argSqrd.msw) / 2;
+			fix_up.msw += mul_32_32(0x898cc517, argTo4.msw) / 24;
+		}
+
+		exp2 += norm_Xsig(&accumulator);
+		shr_Xsig(&accumulator, 1);	/* Prevent overflow */
+		exp2++;
+		shr_Xsig(&fix_up, 65 + exp2);
+
+		add_Xsig_Xsig(&accumulator, &fix_up);
+
+		echange = round_Xsig(&accumulator);
+
+		setexponentpos(&result, exp2 + echange);
+		significand(&result) = XSIG_LL(accumulator);
+	}
+
+	FPU_copy_to_reg0(&result, TAG_Valid);
+
+#ifdef PARANOID
+	if ((exponent(&result) >= 0)
+	    && (significand(&result) > 0x8000000000000000LL)) {
+		EXCEPTION(EX_INTERNAL | 0x151);
+	}
+#endif /* PARANOID */
+
+}