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linux/arch/mips/include/asm
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Paul Burton 597ce1723e MIPS: Support for 64-bit FP with O32 binaries 
CPUs implementing MIPS32 R2 may include a 64-bit FPU, just as MIPS64 CPUs
do. In order to preserve backwards compatibility a 64-bit FPU will act
like a 32-bit FPU (by accessing doubles from the least significant 32
bits of an even-odd pair of FP registers) when the Status.FR bit is
zero, again just like a mips64 CPU. The standard O32 ABI is defined
expecting a 32-bit FPU, however recent toolchains support use of a
64-bit FPU from an O32 MIPS32 executable. When an ELF executable is
built to use a 64-bit FPU a new flag (EF_MIPS_FP64) is set in the ELF
header.

With this patch the kernel will check the EF_MIPS_FP64 flag when
executing an O32 binary, and set Status.FR accordingly. The addition
of O32 64-bit FP support lessens the opportunity for optimisation in
the FPU emulator, so a CONFIG_MIPS_O32_FP64_SUPPORT Kconfig option is
introduced to allow this support to be disabled for those that don't
require it.

Inspired by an earlier patch by Leonid Yegoshin, but implemented more
cleanly & correctly.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Paul Burton <paul.burton@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/6154/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-01-13 23:40:56 +01:00
..
dec
DEC: Whitespace cleanup
2013-10-29 21:24:44 +01:00
emma
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
fw
MIPS: sibyte: Declare the cfe_write() buffer as constant
2013-06-21 18:07:02 +02:00
ip32
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
lasat
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-ar7
Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET"
2013-07-01 15:10:58 +02:00
mach-ath79
MIPS: ath79: Remove ar933x_uart_platform.h header
2013-10-29 21:23:49 +01:00
mach-au1x00
MIPS: Cleanup CP0 PRId and CP1 FPIR register access masks
2013-09-18 20:25:19 +02:00
mach-bcm47xx
MIPS: BCM47XX: Get GPIO pin from nvram configuration
2013-10-29 21:24:05 +01:00
mach-bcm63xx
MIPS: BCM63XX: export PSI size from nvram
2013-08-05 18:58:55 +01:00
mach-cavium-octeon
MIPS: Remove unnecessary platform dma helper functions
2013-10-29 21:24:40 +01:00
mach-cobalt
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-db1x00
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-dec
MIPS: DECstation CPU feature overrides
2013-10-29 21:24:46 +01:00
mach-emma2rh
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-generic
MIPS: Remove unnecessary platform dma helper functions
2013-10-29 21:24:40 +01:00
mach-ip22
MIPS: Optimize current_cpu_type() for better code.
2013-09-17 18:50:53 +02:00
mach-ip27
MIPS: Remove unnecessary platform dma helper functions
2013-10-29 21:24:40 +01:00
mach-ip28
MIPS: Optimize current_cpu_type() for better code.
2013-09-17 18:50:53 +02:00
mach-ip32
MIPS: Remove unnecessary platform dma helper functions
2013-10-29 21:24:40 +01:00
mach-jazz
MIPS: Remove unnecessary platform dma helper functions
2013-10-29 21:24:40 +01:00
mach-jz4740
MIPS: jz4740: Remove custom DMA API
2013-07-05 11:40:52 +05:30
mach-lantiq
MIPS: Lantiq: Falcon: add cpu-feature-override.h
2013-09-03 23:22:16 +02:00
mach-lasat
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-loongson
MIPS: Remove unnecessary platform dma helper functions
2013-10-29 21:24:40 +01:00
mach-loongson1
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-malta
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-netlogic
Merge branch 'mips-next' of http://dev.phrozen.org/githttp/mips-next into mips-for-linux-next
2012-12-13 19:40:13 +01:00
mach-pmcs-msp71xx
MIPS: MSP71xx: Remove gpio drivers
2013-06-18 00:31:31 +02:00
mach-pnx833x
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-ralink
MIPS: ralink: mt7620: Add cpu-feature-override header
2013-09-04 16:58:31 +02:00
mach-rc32434
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-rm
MIPS: PMC-Sierra Yosemite: Remove support.
2012-12-13 18:15:30 +01:00
mach-sead3
MIPS: microMIPS: Disable LL/SC and fix linker bug.
2013-05-09 17:55:19 +02:00
mach-sibyte
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mach-tx39xx
MIPS: PMC-Sierra Yosemite: Remove support.
2012-12-13 18:15:30 +01:00
mach-tx49xx
MIPS: PMC-Sierra Yosemite: Remove support.
2012-12-13 18:15:30 +01:00
mach-vr41xx
MIPS: PMC-Sierra Yosemite: Remove support.
2012-12-13 18:15:30 +01:00
mips-boards
MIPS: Remove unused defines in piix4.h
2013-10-29 21:25:31 +01:00
netlogic
MIPS: Netlogic: replace early_init_devtree() call
2013-11-06 16:14:04 -06:00
octeon
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-11-15 16:47:22 -08:00
pci
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
sgi
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
sibyte
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
sn
MIPS: IP27: Remove pfn_t.
2013-05-08 03:51:58 +02:00
txx9
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
vr41xx
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
xtalk
MIPS: IP27: Fix build errors with CONFIG_PCI disabled.
2013-06-21 18:07:00 +02:00
abi.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
addrspace.h
MIPS: Random whitespace clean-ups
2013-11-04 18:19:20 +01:00
amon.h
…
arch_hweight.h
MIPS: Create and use asm/arch_hweight.h
2010-08-05 13:26:02 +01:00
asm-offsets.h
…
asm.h
MIPS: microMIPS: Optimise 'memset' core library function.
2013-05-09 17:55:19 +02:00
asmmacro-32.h
MIPS: Support for 64-bit FP with O32 binaries
2014-01-13 23:40:56 +01:00
asmmacro-64.h
MIPS: Support for 64-bit FP with O32 binaries
2014-01-13 23:40:56 +01:00
asmmacro.h
MIPS: Support for 64-bit FP with O32 binaries
2014-01-13 23:40:56 +01:00
atomic.h
MIPS: Random whitespace clean-ups
2013-11-04 18:19:20 +01:00
barrier.h
MIPS: Random whitespace clean-ups
2013-11-04 18:19:20 +01:00
bcache.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
bitops.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
bmips.h
MIPS: BMIPS: Fix compilation for BMIPS5000
2013-08-26 15:31:55 +02:00
bootinfo.h
MIPS: add detect_memory_region()
2013-05-08 01:19:11 +02:00
branch.h
MIPS: MIPS16e: Support handling of delay slots.
2013-05-09 17:55:20 +02:00
break.h
MIPS: Quit exporting kernel internel break codes to uapi/asm/break.h
2013-02-20 18:24:24 +01:00
bug.h
…
bugs.h
…
cache.h
MIPS: Rename .data..mostly and properly handle it in linker script
2011-05-10 18:15:24 +01:00
cacheflush.h
MIPS: cache: Provide cache flush operations for XFS
2011-10-20 15:00:18 +01:00
cacheops.h
MIPS: Loongson: Get rid of Loongson 2 #ifdefery all over arch/mips.
2013-10-29 21:25:24 +01:00
cevt-r4k.h
MIPS: MSP: Fix build error
2011-05-10 18:15:24 +01:00
checksum.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
clkdev.h
MIPS: add clkdev.h
2012-05-15 17:49:20 +02:00
clock.h
MIPS: clock.h: Remove declaration of cpu_wait.
2013-05-22 01:34:25 +02:00
cmp.h
…
cmpxchg.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
compat-signal.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
compat.h
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2013-03-02 07:44:16 -08:00
compiler.h
…
cop2.h
MIPS: Netlogic: COP2 save/restore code
2013-06-13 17:46:41 +02:00
cpu-features.h
MIPS: cpu-features.h: s/MIPS53/MIPS64/
2013-09-24 11:07:18 +02:00
cpu-info.h
MIPS: Provide nice way to access boot CPU's data.
2013-09-17 13:58:12 +02:00
cpu-type.h
MIPS: Optimize current_cpu_type() for better code.
2013-09-17 18:50:53 +02:00
cpu.h
MIPS: Cleanup CP0 PRId and CP1 FPIR register access masks
2013-09-18 20:25:19 +02:00
debug.h
…
delay.h
MIPS: Make __{,n,u}delay declarations match definitions and generic delay.h
2012-10-16 22:20:03 +02:00
device.h
MIPS: Convert DMA to use dma-mapping-common.h
2010-10-29 19:08:31 +01:00
div64.h
…
dma-coherence.h
MIPS: Add option to disable software I/O coherency.
2013-05-01 16:32:49 -05:00
dma-mapping.h
MIPS: Add option to disable software I/O coherency.
2013-05-01 16:32:49 -05:00
dma.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
ds1287.h
…
dsp.h
MIPS: DSP: Fix DSP mask for registers.
2013-01-24 13:20:09 +01:00
edac.h
…
elf.h
MIPS: Support for 64-bit FP with O32 binaries
2014-01-13 23:40:56 +01:00
errno.h
UAPI: (Scripted) Disintegrate arch/mips/include/asm
2012-10-09 09:47:14 +01:00
exec.h
Disintegrate asm/system.h for MIPS
2012-03-28 18:30:02 +01:00
fb.h
…
fixmap.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
floppy.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
fpregdef.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
fpu_emulator.h
MIPS: microMIPS: Floating point support.
2013-05-09 17:55:18 +02:00
fpu.h
MIPS: Support for 64-bit FP with O32 binaries
2014-01-13 23:40:56 +01:00
ftrace.h
…
futex.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
gcmpregs.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
gic.h
MIPS: Fix typos and cleanup comment
2013-07-01 15:10:57 +02:00
gio_device.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
gpio.h
…
gt64120.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
hardirq.h
…
hazards.h
MIPS: Get rid of the use of .macro in C code.
2013-04-11 15:39:51 +02:00
highmem.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
hugetlb.h
mm/hugetlb: add more arch-defined huge_pte functions
2013-04-29 15:54:33 -07:00
hw_irq.h
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
i8259.h
…
ide.h
…
idle.h
MIPS: Idle: Break r4k_wait into two functions and fix it.
2013-05-22 01:34:28 +02:00
inst.h
MIPS: MIPS16e: Support handling of delay slots.
2013-05-09 17:55:20 +02:00
io.h
MIPS: define write{b,w,l,q}_relaxed
2013-07-01 15:10:59 +02:00
irq_cpu.h
MIPS: add irqdomain support for the CPU IRQ controller
2013-02-17 01:25:34 +01:00
irq_gt641xx.h
…
irq_regs.h
…
irq.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
irqflags.h
MIPS: Get rid of the use of .macro in C code.
2013-04-11 15:39:51 +02:00
isadep.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
jazz.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
jazzdma.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
jump_label.h
compiler/gcc4: Add quirk for 'asm goto' miscompilation bug
2013-10-11 07:39:14 +02:00
Kbuild
sched, arch: Create asm/preempt.h
2013-09-25 14:07:50 +02:00
kdebug.h
MIPS: kprobe: Add support.
2010-08-05 13:26:29 +01:00
kexec.h
MIPS: kdump: Add support
2012-12-13 16:46:47 +01:00
kgdb.h
kgdb,mips: Individual register get/set for mips
2010-08-05 09:22:21 -05:00
kmap_types.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
kprobes.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
kvm_host.h
KVM: mips: Get rid of KVM_HPAGE defines
2013-10-14 10:12:08 +03:00
linkage.h
consolidate cond_syscall and SYSCALL_ALIAS declarations
2013-03-03 22:55:19 -05:00
local.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
m48t37.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mc146818-time.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mc146818rtc.h
…
mips_machine.h
MIPS: move mips_{set,get}_machine_name() to a more generic place
2013-05-08 01:19:07 +02:00
mips_mt.h
…
mipsmtregs.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
mipsprom.h
MIPS: SNI: Fix conflicting wrapper symbols for headers.
2011-10-20 15:00:18 +01:00
mipsregs.h
MIPS: Add MIPS R5 config5 register.
2013-09-19 11:16:44 +02:00
mmu_context.h
MIPS: mm: Use scratch for PGD when !CONFIG_MIPS_PGD_C0_CONTEXT
2013-10-29 21:24:51 +01:00
mmu.h
…
mmzone.h
…
module.h
MIPS: PMC-Sierra Yosemite: Remove support.
2012-12-13 18:15:30 +01:00
msc01_ic.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
nile4.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
paccess.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
page.h
Revert "MIPS: make CAC_ADDR and UNCAC_ADDR account for PHYS_OFFSET"
2013-07-01 15:10:58 +02:00
pci.h
MIPS: PCI: Use pci_resource_to_user to map pci memory space properly
2013-09-19 00:48:48 +02:00
perf_event.h
MIPS, Perf-events: Work with irq_work
2011-03-14 21:07:26 +01:00
pgalloc.h
mips: handle pgtable_page_ctor() fail
2013-11-15 09:32:18 +09:00
pgtable-32.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
pgtable-64.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
pgtable-bits.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
pgtable.h
consolidate io_remap_pfn_range definitions
2013-06-29 12:46:35 +04:00
pmon.h
…
prefetch.h
…
processor.h
MIPS: Cleanup indentation and whitespace
2013-07-01 15:10:57 +02:00
prom.h
of: implement pci_address_to_pio as weak function
2013-10-09 20:04:06 -05:00
ptrace.h
MIPS: Enable HAVE_ARCH_TRACEHOOK.
2013-10-29 21:25:11 +01:00
r4k-timer.h
MIPS: Synchronize MIPS count one CPU at a time
2012-08-17 10:57:28 +02:00
r4kcache.h
MIPS: Loongson: Get rid of Loongson 2 #ifdefery all over arch/mips.
2013-10-29 21:25:24 +01:00
reboot.h
…
reg.h
…
regdef.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
rm9k-ocd.h
…
rtlx.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
seccomp.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
setup.h
MIPS: Add 8250/16550 serial early printk driver
2013-10-29 21:24:36 +01:00
sgialib.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
sgiarcs.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
shmparam.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
sigcontext.h
UAPI: (Scripted) Disintegrate arch/mips/include/asm
2012-10-09 09:47:14 +01:00
siginfo.h
UAPI: (Scripted) Disintegrate arch/mips/include/asm
2012-10-09 09:47:14 +01:00
signal.h
Fix breakage in MIPS siginfo handling
2013-03-19 19:15:52 +01:00
sim.h
mips: switch to generic sys_fork() and sys_clone()
2013-02-03 18:33:02 -05:00
smp-ops.h
MIPS: ARC: Fix build of firmware library on uniprocessor.
2011-07-20 23:12:11 +01:00
smp.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
smtc_ipi.h
…
smtc_proc.h
…
smtc.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
sni.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
socket.h
UAPI: (Scripted) Disintegrate arch/mips/include/asm
2012-10-09 09:47:14 +01:00
sparsemem.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
spinlock_types.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
spinlock.h
MIPS: Remove redundant instructions from arch_spin_{,try}lock.
2013-04-26 17:18:24 +02:00
spram.h
…
stackframe.h
MIPS: Move definition of SMP processor id register to header file
2013-10-29 21:23:51 +01:00
stackprotector.h
MIPS: initial stack protector support
2013-07-01 15:10:48 +02:00
stacktrace.h
MIPS: Add new unwind_stack variant
2011-06-15 14:35:33 +02:00
string.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
suspend.h
PM / Hibernate: Remove arch_prepare_suspend()
2011-05-24 23:35:55 +02:00
switch_to.h
MIPS: Move cop2 save/restore to switch_to()
2013-06-13 17:46:41 +02:00
syscall.h
MIPS: ftrace: Add support for syscall tracepoints.
2013-10-29 21:25:16 +01:00
termios.h
UAPI: (Scripted) Disintegrate arch/mips/include/asm
2012-10-09 09:47:14 +01:00
thread_info.h
MIPS: Support for 64-bit FP with O32 binaries
2014-01-13 23:40:56 +01:00
time.h
MIPS: Always register R4K clock when selected
2013-10-29 21:25:26 +01:00
timex.h
MIPS: Reimplement get_cycles().
2013-09-18 16:31:49 +02:00
tlb.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
tlbdebug.h
…
tlbflush.h
…
tlbmisc.h
MIPS: Fix Jazz 64-bit build error.
2011-12-07 22:01:45 +00:00
topology.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
traps.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
txx9irq.h
…
txx9pio.h
…
txx9tmr.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
types.h
UAPI: (Scripted) Disintegrate arch/mips/include/asm
2012-10-09 09:47:14 +01:00
uaccess.h
Merge branch 'mti-next' of git://git.linux-mips.org/pub/scm/sjhill/linux-sjhill into mips-for-linux-next
2013-05-09 17:57:30 +02:00
uasm.h
MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code
2013-07-14 19:36:51 -04:00
unaligned.h
…
unistd.h
MIPS: ftrace: Add support for syscall tracepoints.
2013-10-29 21:25:16 +01:00
user.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
vdso.h
…
vga.h
MIPS: Fix VGA_MAP_MEM macro.
2013-09-18 17:13:58 +02:00
vpe.h
…
war.h
MIPS: Whitespace cleanup.
2013-02-01 10:00:22 +01:00
watch.h
…
wbflush.h
…