| /Linux-v5.4/arch/sparc/kernel/ |
| D | cpu.c | 60 #define FPU(ver, _name) \ macro
75 FPU(0, "Fujitsu MB86910 or Weitek WTL1164/5"),
76 FPU(1, "Fujitsu MB86911 or Weitek WTL1164/5 or LSI L64831"),
77 FPU(2, "LSI Logic L64802 or Texas Instruments ACT8847"),
79 FPU(3, "Weitek WTL3170/2"),
81 FPU(4, "Lsi Logic/Meiko L64804 or compatible"),
82 FPU(-1, NULL)
99 FPU(0, "ROSS HyperSparc combined IU/FPU"),
100 FPU(1, "Lsi Logic L64814"),
101 FPU(2, "Texas Instruments TMS390-C602A"),
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| /Linux-v5.4/arch/x86/math-emu/ |
| D | README | 2 | wm-FPU-emu an FPU emulator for 80386 and 80486SX microprocessors. |
25 wm-FPU-emu is an FPU emulator for Linux. It is derived from wm-emu387
31 My target FPU for wm-FPU-emu is that described in the Intel486
33 facets of the functioning of the FPU are not well covered in the
40 wm-FPU-emu does not implement all of the behaviour of the 80486 FPU,
56 ----------------------- Internals of wm-FPU-emu -----------------------
82 emulate each FPU instruction to completion without interruption.
99 ----------------------- Limitations of wm-FPU-emu -----------------------
101 There are a number of differences between the current wm-FPU-emu
102 (version 2.01) and the 80486 FPU (apart from bugs). The differences
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| /Linux-v5.4/arch/nds32/ |
| D | Kconfig.cpu | 11 config FPU config
12 bool "FPU support"
15 If FPU ISA is used in user space, this configuration shall be Y to
19 If no FPU ISA is used in user space, say N.
22 bool "lazy FPU support"
23 depends on FPU
26 Say Y here to enable the lazy FPU scheme. The lazy FPU scheme can
28 frequency of the FPU register.
34 depends on FPU
40 possibly significant due to additional FPU exception.
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| /Linux-v5.4/arch/sh/ |
| D | Kconfig.cpu | 22 prompt "FPU support"
26 have FPU units (ie, SH77xx).
28 This option must be set in order to enable the FPU.
36 prompt "FPU emulation support"
39 Selecting this option will enable support for software FPU emulation.
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| /Linux-v5.4/arch/mips/kvm/ |
| D | 00README.txt | 29 (5) Use Host FPU
30 Currently KVM/MIPS emulates a 24K CPU without a FPU.
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| /Linux-v5.4/Documentation/ |
| D | preempt-locking.txt | 46 switch. For example, on x86, entering and exiting FPU mode is now a critical
49 Remember, the kernel does not save FPU state except for user tasks. Therefore,
50 upon preemption, the FPU registers will be sold to the lowest bidder. Thus,
53 Note, some FPU functions are already explicitly preempt safe. For example,
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| /Linux-v5.4/arch/m68k/ |
| D | Kconfig.cpu | 66 select FPU
77 select FPU
87 select FPU
98 select FPU
267 select FPU if MMU
277 select FPU if MMU
423 config FPU config
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| /Linux-v5.4/arch/m68k/ifpsp060/ |
| D | fskeleton.S | 208 | the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
219 | This is the exit point for the 060FPSP when an FPU disabled exception is
222 | the FPU is disabled, and F-Line Illegal instructions. The 060FPSP module
223 | _fpsp_fline() distinguishes between the three and acts appropriately. FPU disabled
226 | The sample code below enables the FPU, sets the PC field in the exception stack
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| /Linux-v5.4/tools/testing/selftests/powerpc/math/ |
| D | fpu_asm.S | 97 # On starting will (atomically) decrement not_ready as a signal that the FPU
98 # has been loaded with darray. Will proceed to check the validity of the FPU
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| /Linux-v5.4/Documentation/arm/stm32/ |
| D | stm32f429-overview.rst | 11 - ARM Cortex-M4 up to 180MHz with FPU
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| /Linux-v5.4/arch/mips/include/asm/fw/arc/ |
| D | hinv.h | 32 FPU, enumerator
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| /Linux-v5.4/arch/mips/dec/ |
| D | int-handler.S | 144 bnez t2,fpu # handle FPU immediately
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| /Linux-v5.4/arch/arc/ |
| D | Kconfig | 360 bool "Enable FPU state persistence across context switch"
364 Note that ARC FPU is overly simplistic, unlike say x86, which has
366 based on actual usage of FPU by a task. Thus our implemn does
407 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)"
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| /Linux-v5.4/arch/x86/kernel/ |
| D | head_32.S | 250 andl $~1,%edx # Ignore CPUID.FPU
251 jz .Lenable_paging # No flags or only CPUID.FPU = no CR4
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| /Linux-v5.4/arch/riscv/ |
| D | Kconfig | 260 config FPU config
261 bool "FPU support"
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| /Linux-v5.4/arch/c6x/ |
| D | Kconfig | 28 config FPU config
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| /Linux-v5.4/arch/csky/ |
| D | Kconfig | 195 bool "CPU has FPU coprocessor"
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| /Linux-v5.4/arch/m68k/fpsp040/ |
| D | fpsp.h | 28 | | FPU fsave area |
60 | if the FPU state after the exception is idle.
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| /Linux-v5.4/arch/m68k/ifpsp060/src/ |
| D | pfpsp.S | 960 # The `060 FPU multiplier hardware is such that if the result of a
1380 # restore exc state (SNAN||OPERR||OVFL||UNFL||DZ||INEX) into the FPU;
1958 # restore exc state (SNAN||OPERR||OVFL||UNFL||DZ||INEX) into the FPU;
2393 # If FPU disabled: #
2394 # - The system stack is changed to an FPU disabled stack frame #
2415 # FPU before exiting. In either the enabled or disabled cases, we #
2459 btst &0x1,%d0 # is FPU disabled?
2943 # The FPU is disabled and so we should really have taken the "Line
3830 # can occur because then FPU is disabled or the instruction is to be #
3839 # check to see if the FPU is disabled. if so, jump to the OS entry
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| /Linux-v5.4/arch/nios2/ |
| D | Kconfig | 41 config FPU config
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| /Linux-v5.4/Documentation/parisc/ |
| D | registers.rst | 18 CR10 (CCR) lazy FPU saving*
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| /Linux-v5.4/drivers/zorro/ |
| D | zorro.ids | 127 1000 DKM 1202 [FPU and RAM Expansion]
353 0100 A1200 [FPU and RAM Expansion]
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| /Linux-v5.4/arch/x86/kvm/ |
| D | cpuid.c | 448 F(FPU) | F(VME) | F(DE) | F(PSE) | in __do_cpuid_func()
458 F(FPU) | F(VME) | F(DE) | F(PSE) | in __do_cpuid_func()
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| /Linux-v5.4/arch/m68k/math-emu/ |
| D | fp_scan.S | 61 | FPDATA - base of emulated FPU registers
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| /Linux-v5.4/arch/powerpc/ |
| D | Kconfig | 422 such as fsqrt on cores that do have an FPU but do not implement
435 a FPU, you should select this.
438 bool "Just emulate the FPU unimplemented instructions"
440 Select this if you know there does have a hardware FPU on your
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