iris::arch::FpuState Struct Reference

#include <iris/arch/x86/amd64/core/task.h>

Public Member Functions
	FpuState ()=default
	~FpuState ()
auto	setup_fpu_state () -> Expected< void >
	Setup the task's FPU state. This must be called for userspace tasks.
auto	setup_initial_fpu_state () -> Expected< void >
void	load ()
void	save ()

Public Attributes
byte *	fpu_state { nullptr }

Constructor & Destructor Documentation

FpuState()

iris::arch::FpuState::FpuState ( )

default

~FpuState()

iris::arch::FpuState::~FpuState

(

)

Member Function Documentation

load()

void iris::arch::FpuState::load

(

)

Load this task's FPU state into the registers. This only makes sense to call when IRQs are disabled, right before performing a context switch.

save()

void iris::arch::FpuState::save

(

)

Save the current processor's FPU state into this task. This only makes sense to call when IRQs are disabled, when the task has just been interrupted.

setup_fpu_state()

auto iris::arch::FpuState::setup_fpu_state

(

)

-> Expected<void>

Setup the task's FPU state. This must be called for userspace tasks.

setup_initial_fpu_state()

auto iris::arch::FpuState::setup_initial_fpu_state

(

)

-> Expected<void>

Setup initial FPU state. This creates a clean-copy of the FPU state which is copied to newly created tasks. This also configures the processor to allow floating-point / SIMD operations.

Member Data Documentation

fpu_state

byte* iris::arch::FpuState::fpu_state { nullptr }

This is the task's FPU state. It is null for kernel-space tasks. Since it is dynamically sized, it must be managed manually.

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The documentation for this struct was generated from the following files:

• iris/include/iris/arch/x86/amd64/core/task.h
• iris/arch/x86/amd64/core/task.cpp