| /linux/arch/sparc/kernel/ |
| A D | cpu.c | 82 FPU(-1, NULL)
103 FPU(-1, NULL)
114 FPU(-1, NULL)
123 FPU(-1, NULL)
142 FPU(-1, NULL)
152 FPU(-1, NULL)
161 FPU(-1, NULL)
170 FPU(-1, NULL)
179 FPU(-1, NULL)
193 FPU(-1, NULL)
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| /linux/arch/x86/math-emu/ |
| A 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,
82 emulate each FPU instruction to completion without interruption.
101 There are a number of differences between the current wm-FPU-emu
167 affected by the FPU instruction trap overhead.
203 wm-FPU-emu w original w
229 than that of an Intel 80486 FPU.
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| /linux/arch/nds32/ |
| A 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/arch/sh/ |
| A 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/Documentation/locking/ |
| A 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/arch/m68k/ifpsp060/ |
| A 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/arch/m68k/ |
| A D | Kconfig.cpu | 59 select FPU
70 select FPU
80 select FPU
91 select FPU
273 select FPU if MMU
284 select FPU if MMU
457 config FPU config
|
| /linux/tools/testing/selftests/powerpc/math/ |
| A 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/Documentation/translations/zh_CN/kernel-hacking/ |
| A 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/Documentation/arm/stm32/ |
| A D | stm32f429-overview.rst | 11 - ARM Cortex-M4 up to 180MHz with FPU
|
| /linux/arch/x86/kernel/ |
| A 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/arch/mips/include/asm/fw/arc/ |
| A D | hinv.h | 32 FPU, enumerator
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| /linux/Documentation/translations/zh_CN/parisc/ |
| A D | registers.rst | 28 CR10 (CCR) FPU延迟保存*
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| /linux/arch/powerpc/platforms/ |
| A 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/tools/arch/x86/kcpuid/ |
| A 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/arch/mips/dec/ |
| A D | int-handler.S | 144 bnez t2,fpu # handle FPU immediately
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| /linux/arch/arc/ |
| A D | Kconfig | 325 bool "Enable FPU state persistence across context switch"
327 ARCompact FPU has internal registers to assist with Double precision
368 bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6 and/or DSP)"
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| /linux/arch/m68k/fpsp040/ |
| A D | fpsp.h | 28 | | FPU fsave area |
60 | if the FPU state after the exception is idle.
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| /linux/arch/m68k/ifpsp060/src/ |
| A 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/arch/nios2/ |
| A D | Kconfig | 41 config FPU config
|
| /linux/Documentation/parisc/ |
| A D | registers.rst | 18 CR10 (CCR) lazy FPU saving*
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| /linux/drivers/zorro/ |
| A D | zorro.ids | 127 1000 DKM 1202 [FPU and RAM Expansion]
353 0100 A1200 [FPU and RAM Expansion]
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| /linux/arch/csky/ |
| A D | Kconfig | 280 bool "CPU has FPU coprocessor"
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| /linux/arch/x86/kvm/ |
| A D | cpuid.c | 455 F(FPU) | F(VME) | F(DE) | F(PSE) | in kvm_set_cpu_caps()
530 F(FPU) | F(VME) | F(DE) | F(PSE) | in kvm_set_cpu_caps()
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| /linux/arch/riscv/ |
| A D | Kconfig | 383 config FPU config
384 bool "FPU support"
|