From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- arch/parisc/math-emu/dfdiv.c | 387 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 387 insertions(+) create mode 100644 arch/parisc/math-emu/dfdiv.c (limited to 'arch/parisc/math-emu/dfdiv.c') diff --git a/arch/parisc/math-emu/dfdiv.c b/arch/parisc/math-emu/dfdiv.c new file mode 100644 index 000000000..239150dbe --- /dev/null +++ b/arch/parisc/math-emu/dfdiv.c @@ -0,0 +1,387 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Linux/PA-RISC Project (http://www.parisc-linux.org/) + * + * Floating-point emulation code + * Copyright (C) 2001 Hewlett-Packard (Paul Bame) + */ +/* + * BEGIN_DESC + * + * File: + * @(#) pa/spmath/dfdiv.c $Revision: 1.1 $ + * + * Purpose: + * Double Precision Floating-point Divide + * + * External Interfaces: + * dbl_fdiv(srcptr1,srcptr2,dstptr,status) + * + * Internal Interfaces: + * + * Theory: + * <> + * + * END_DESC +*/ + + +#include "float.h" +#include "dbl_float.h" + +/* + * Double Precision Floating-point Divide + */ + +int +dbl_fdiv (dbl_floating_point * srcptr1, dbl_floating_point * srcptr2, + dbl_floating_point * dstptr, unsigned int *status) +{ + register unsigned int opnd1p1, opnd1p2, opnd2p1, opnd2p2; + register unsigned int opnd3p1, opnd3p2, resultp1, resultp2; + register int dest_exponent, count; + register boolean inexact = FALSE, guardbit = FALSE, stickybit = FALSE; + boolean is_tiny; + + Dbl_copyfromptr(srcptr1,opnd1p1,opnd1p2); + Dbl_copyfromptr(srcptr2,opnd2p1,opnd2p2); + /* + * set sign bit of result + */ + if (Dbl_sign(opnd1p1) ^ Dbl_sign(opnd2p1)) + Dbl_setnegativezerop1(resultp1); + else Dbl_setzerop1(resultp1); + /* + * check first operand for NaN's or infinity + */ + if (Dbl_isinfinity_exponent(opnd1p1)) { + if (Dbl_iszero_mantissa(opnd1p1,opnd1p2)) { + if (Dbl_isnotnan(opnd2p1,opnd2p2)) { + if (Dbl_isinfinity(opnd2p1,opnd2p2)) { + /* + * invalid since both operands + * are infinity + */ + if (Is_invalidtrap_enabled()) + return(INVALIDEXCEPTION); + Set_invalidflag(); + Dbl_makequietnan(resultp1,resultp2); + Dbl_copytoptr(resultp1,resultp2,dstptr); + return(NOEXCEPTION); + } + /* + * return infinity + */ + Dbl_setinfinity_exponentmantissa(resultp1,resultp2); + Dbl_copytoptr(resultp1,resultp2,dstptr); + return(NOEXCEPTION); + } + } + else { + /* + * is NaN; signaling or quiet? + */ + if (Dbl_isone_signaling(opnd1p1)) { + /* trap if INVALIDTRAP enabled */ + if (Is_invalidtrap_enabled()) + return(INVALIDEXCEPTION); + /* make NaN quiet */ + Set_invalidflag(); + Dbl_set_quiet(opnd1p1); + } + /* + * is second operand a signaling NaN? + */ + else if (Dbl_is_signalingnan(opnd2p1)) { + /* trap if INVALIDTRAP enabled */ + if (Is_invalidtrap_enabled()) + return(INVALIDEXCEPTION); + /* make NaN quiet */ + Set_invalidflag(); + Dbl_set_quiet(opnd2p1); + Dbl_copytoptr(opnd2p1,opnd2p2,dstptr); + return(NOEXCEPTION); + } + /* + * return quiet NaN + */ + Dbl_copytoptr(opnd1p1,opnd1p2,dstptr); + return(NOEXCEPTION); + } + } + /* + * check second operand for NaN's or infinity + */ + if (Dbl_isinfinity_exponent(opnd2p1)) { + if (Dbl_iszero_mantissa(opnd2p1,opnd2p2)) { + /* + * return zero + */ + Dbl_setzero_exponentmantissa(resultp1,resultp2); + Dbl_copytoptr(resultp1,resultp2,dstptr); + return(NOEXCEPTION); + } + /* + * is NaN; signaling or quiet? + */ + if (Dbl_isone_signaling(opnd2p1)) { + /* trap if INVALIDTRAP enabled */ + if (Is_invalidtrap_enabled()) return(INVALIDEXCEPTION); + /* make NaN quiet */ + Set_invalidflag(); + Dbl_set_quiet(opnd2p1); + } + /* + * return quiet NaN + */ + Dbl_copytoptr(opnd2p1,opnd2p2,dstptr); + return(NOEXCEPTION); + } + /* + * check for division by zero + */ + if (Dbl_iszero_exponentmantissa(opnd2p1,opnd2p2)) { + if (Dbl_iszero_exponentmantissa(opnd1p1,opnd1p2)) { + /* invalid since both operands are zero */ + if (Is_invalidtrap_enabled()) return(INVALIDEXCEPTION); + Set_invalidflag(); + Dbl_makequietnan(resultp1,resultp2); + Dbl_copytoptr(resultp1,resultp2,dstptr); + return(NOEXCEPTION); + } + if (Is_divisionbyzerotrap_enabled()) + return(DIVISIONBYZEROEXCEPTION); + Set_divisionbyzeroflag(); + Dbl_setinfinity_exponentmantissa(resultp1,resultp2); + Dbl_copytoptr(resultp1,resultp2,dstptr); + return(NOEXCEPTION); + } + /* + * Generate exponent + */ + dest_exponent = Dbl_exponent(opnd1p1) - Dbl_exponent(opnd2p1) + DBL_BIAS; + + /* + * Generate mantissa + */ + if (Dbl_isnotzero_exponent(opnd1p1)) { + /* set hidden bit */ + Dbl_clear_signexponent_set_hidden(opnd1p1); + } + else { + /* check for zero */ + if (Dbl_iszero_mantissa(opnd1p1,opnd1p2)) { + Dbl_setzero_exponentmantissa(resultp1,resultp2); + Dbl_copytoptr(resultp1,resultp2,dstptr); + return(NOEXCEPTION); + } + /* is denormalized, want to normalize */ + Dbl_clear_signexponent(opnd1p1); + Dbl_leftshiftby1(opnd1p1,opnd1p2); + Dbl_normalize(opnd1p1,opnd1p2,dest_exponent); + } + /* opnd2 needs to have hidden bit set with msb in hidden bit */ + if (Dbl_isnotzero_exponent(opnd2p1)) { + Dbl_clear_signexponent_set_hidden(opnd2p1); + } + else { + /* is denormalized; want to normalize */ + Dbl_clear_signexponent(opnd2p1); + Dbl_leftshiftby1(opnd2p1,opnd2p2); + while (Dbl_iszero_hiddenhigh7mantissa(opnd2p1)) { + dest_exponent+=8; + Dbl_leftshiftby8(opnd2p1,opnd2p2); + } + if (Dbl_iszero_hiddenhigh3mantissa(opnd2p1)) { + dest_exponent+=4; + Dbl_leftshiftby4(opnd2p1,opnd2p2); + } + while (Dbl_iszero_hidden(opnd2p1)) { + dest_exponent++; + Dbl_leftshiftby1(opnd2p1,opnd2p2); + } + } + + /* Divide the source mantissas */ + + /* + * A non-restoring divide algorithm is used. + */ + Twoword_subtract(opnd1p1,opnd1p2,opnd2p1,opnd2p2); + Dbl_setzero(opnd3p1,opnd3p2); + for (count=1; count <= DBL_P && (opnd1p1 || opnd1p2); count++) { + Dbl_leftshiftby1(opnd1p1,opnd1p2); + Dbl_leftshiftby1(opnd3p1,opnd3p2); + if (Dbl_iszero_sign(opnd1p1)) { + Dbl_setone_lowmantissap2(opnd3p2); + Twoword_subtract(opnd1p1,opnd1p2,opnd2p1,opnd2p2); + } + else { + Twoword_add(opnd1p1, opnd1p2, opnd2p1, opnd2p2); + } + } + if (count <= DBL_P) { + Dbl_leftshiftby1(opnd3p1,opnd3p2); + Dbl_setone_lowmantissap2(opnd3p2); + Dbl_leftshift(opnd3p1,opnd3p2,(DBL_P-count)); + if (Dbl_iszero_hidden(opnd3p1)) { + Dbl_leftshiftby1(opnd3p1,opnd3p2); + dest_exponent--; + } + } + else { + if (Dbl_iszero_hidden(opnd3p1)) { + /* need to get one more bit of result */ + Dbl_leftshiftby1(opnd1p1,opnd1p2); + Dbl_leftshiftby1(opnd3p1,opnd3p2); + if (Dbl_iszero_sign(opnd1p1)) { + Dbl_setone_lowmantissap2(opnd3p2); + Twoword_subtract(opnd1p1,opnd1p2,opnd2p1,opnd2p2); + } + else { + Twoword_add(opnd1p1,opnd1p2,opnd2p1,opnd2p2); + } + dest_exponent--; + } + if (Dbl_iszero_sign(opnd1p1)) guardbit = TRUE; + stickybit = Dbl_allp1(opnd1p1) || Dbl_allp2(opnd1p2); + } + inexact = guardbit | stickybit; + + /* + * round result + */ + if (inexact && (dest_exponent > 0 || Is_underflowtrap_enabled())) { + Dbl_clear_signexponent(opnd3p1); + switch (Rounding_mode()) { + case ROUNDPLUS: + if (Dbl_iszero_sign(resultp1)) + Dbl_increment(opnd3p1,opnd3p2); + break; + case ROUNDMINUS: + if (Dbl_isone_sign(resultp1)) + Dbl_increment(opnd3p1,opnd3p2); + break; + case ROUNDNEAREST: + if (guardbit && (stickybit || + Dbl_isone_lowmantissap2(opnd3p2))) { + Dbl_increment(opnd3p1,opnd3p2); + } + } + if (Dbl_isone_hidden(opnd3p1)) dest_exponent++; + } + Dbl_set_mantissa(resultp1,resultp2,opnd3p1,opnd3p2); + + /* + * Test for overflow + */ + if (dest_exponent >= DBL_INFINITY_EXPONENT) { + /* trap if OVERFLOWTRAP enabled */ + if (Is_overflowtrap_enabled()) { + /* + * Adjust bias of result + */ + Dbl_setwrapped_exponent(resultp1,dest_exponent,ovfl); + Dbl_copytoptr(resultp1,resultp2,dstptr); + if (inexact) + if (Is_inexacttrap_enabled()) + return(OVERFLOWEXCEPTION | INEXACTEXCEPTION); + else Set_inexactflag(); + return(OVERFLOWEXCEPTION); + } + Set_overflowflag(); + /* set result to infinity or largest number */ + Dbl_setoverflow(resultp1,resultp2); + inexact = TRUE; + } + /* + * Test for underflow + */ + else if (dest_exponent <= 0) { + /* trap if UNDERFLOWTRAP enabled */ + if (Is_underflowtrap_enabled()) { + /* + * Adjust bias of result + */ + Dbl_setwrapped_exponent(resultp1,dest_exponent,unfl); + Dbl_copytoptr(resultp1,resultp2,dstptr); + if (inexact) + if (Is_inexacttrap_enabled()) + return(UNDERFLOWEXCEPTION | INEXACTEXCEPTION); + else Set_inexactflag(); + return(UNDERFLOWEXCEPTION); + } + + /* Determine if should set underflow flag */ + is_tiny = TRUE; + if (dest_exponent == 0 && inexact) { + switch (Rounding_mode()) { + case ROUNDPLUS: + if (Dbl_iszero_sign(resultp1)) { + Dbl_increment(opnd3p1,opnd3p2); + if (Dbl_isone_hiddenoverflow(opnd3p1)) + is_tiny = FALSE; + Dbl_decrement(opnd3p1,opnd3p2); + } + break; + case ROUNDMINUS: + if (Dbl_isone_sign(resultp1)) { + Dbl_increment(opnd3p1,opnd3p2); + if (Dbl_isone_hiddenoverflow(opnd3p1)) + is_tiny = FALSE; + Dbl_decrement(opnd3p1,opnd3p2); + } + break; + case ROUNDNEAREST: + if (guardbit && (stickybit || + Dbl_isone_lowmantissap2(opnd3p2))) { + Dbl_increment(opnd3p1,opnd3p2); + if (Dbl_isone_hiddenoverflow(opnd3p1)) + is_tiny = FALSE; + Dbl_decrement(opnd3p1,opnd3p2); + } + break; + } + } + + /* + * denormalize result or set to signed zero + */ + stickybit = inexact; + Dbl_denormalize(opnd3p1,opnd3p2,dest_exponent,guardbit, + stickybit,inexact); + + /* return rounded number */ + if (inexact) { + switch (Rounding_mode()) { + case ROUNDPLUS: + if (Dbl_iszero_sign(resultp1)) { + Dbl_increment(opnd3p1,opnd3p2); + } + break; + case ROUNDMINUS: + if (Dbl_isone_sign(resultp1)) { + Dbl_increment(opnd3p1,opnd3p2); + } + break; + case ROUNDNEAREST: + if (guardbit && (stickybit || + Dbl_isone_lowmantissap2(opnd3p2))) { + Dbl_increment(opnd3p1,opnd3p2); + } + break; + } + if (is_tiny) Set_underflowflag(); + } + Dbl_set_exponentmantissa(resultp1,resultp2,opnd3p1,opnd3p2); + } + else Dbl_set_exponent(resultp1,dest_exponent); + Dbl_copytoptr(resultp1,resultp2,dstptr); + + /* check for inexact */ + if (inexact) { + if (Is_inexacttrap_enabled()) return(INEXACTEXCEPTION); + else Set_inexactflag(); + } + return(NOEXCEPTION); +} -- cgit v1.2.3