| /Linux-v5.15/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-v5.15/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-v5.15/arch/sh/ |
| D | Kconfig.cpu | 21 prompt "FPU support"
25 have FPU units (ie, SH77xx).
27 This option must be set in order to enable the FPU.
31 prompt "FPU emulation support"
34 Selecting this option will enable support for software FPU emulation.
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| /Linux-v5.15/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-v5.15/Documentation/locking/ |
| D | preempt-locking.rst | 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-v5.15/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-v5.15/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-v5.15/arch/m68k/ |
| D | Kconfig.cpu | 70 select FPU
81 select FPU
91 select FPU
102 select FPU
284 select FPU if MMU
295 select FPU if MMU
468 config FPU config
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| /Linux-v5.15/Documentation/translations/zh_CN/kernel-hacking/ |
| D | hacking.rst | 117 FPU上下文不会被保存；即使在用户上下文中，FPU状态也可能与当前进程不一致：
118 您会弄乱某些用户进程的FPU状态。如果真的要这样做，就必须显式地保存/恢复
119 完整的FPU状态（并避免上下文切换）。这通常不是个好主意；请优先用定点算法。
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| /Linux-v5.15/Documentation/arm/stm32/ |
| D | stm32f429-overview.rst | 11 - ARM Cortex-M4 up to 180MHz with FPU
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| /Linux-v5.15/arch/x86/kernel/ |
| D | head_32.S | 214 andl $~1,%edx # Ignore CPUID.FPU
215 jz .Lenable_paging # No flags or only CPUID.FPU = no CR4
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| /Linux-v5.15/arch/mips/include/asm/fw/arc/ |
| D | hinv.h | 32 FPU, enumerator
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| /Linux-v5.15/Documentation/translations/zh_CN/parisc/ |
| D | registers.rst | 28 CR10 (CCR) FPU延迟保存*
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| /Linux-v5.15/arch/mips/dec/ |
| D | int-handler.S | 144 bnez t2,fpu # handle FPU immediately
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| /Linux-v5.15/arch/powerpc/platforms/ |
| D | Kconfig.cputype | 242 bool "Support for Floating Point Unit (FPU)" if PPC_MPC832x
247 Most 6xx have an FPU but e300c2 core (mpc832x) don't have
248 an FPU, so when building an embedded kernel for that target
249 you can disable FPU support.
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| /Linux-v5.15/tools/arch/x86/kcpuid/ |
| D | cpuid.csv | 51 1, 0, EDX, 0, fpu, x87 FPU on chip
163 # 7, 0, EBX, 6, fdp_excp_only, x87 FPU Data Pointer updated only on x87 exceptions
170 7, 0, EBX, 13, depc_fpu_cs_ds, Deprecates FPU CS and FPU DS
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| /Linux-v5.15/arch/arc/ |
| D | Kconfig | 326 bool "Enable FPU state persistence across context switch"
328 ARCompact FPU has internal registers to assist with Double precision
369 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6 and/or DSP)"
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| /Linux-v5.15/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-v5.15/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-v5.15/arch/nios2/ |
| D | Kconfig | 41 config FPU config
|
| /Linux-v5.15/Documentation/parisc/ |
| D | registers.rst | 18 CR10 (CCR) lazy FPU saving*
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| /Linux-v5.15/arch/csky/ |
| D | Kconfig | 281 bool "CPU has FPU coprocessor"
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| /Linux-v5.15/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-v5.15/arch/x86/kvm/ |
| D | cpuid.c | 412 F(FPU) | F(VME) | F(DE) | F(PSE) | in kvm_set_cpu_caps()
487 F(FPU) | F(VME) | F(DE) | F(PSE) | in kvm_set_cpu_caps()
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| /Linux-v5.15/arch/riscv/ |
| D | Kconfig | 383 config FPU config
384 bool "FPU support"
|
