cpu.h File Reference

Functions related to CPU specific instructions. More...

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Functions
void	ottd_cpuid (int info[4], int type)
	Get the CPUID information from the CPU. More...
bool	HasCPUIDFlag (uint type, uint index, uint bit)
	Check whether the current CPU has the given flag. More...

Detailed Description

Functions related to CPU specific instructions.

Definition in file cpu.h.

Function Documentation

HasCPUIDFlag()

bool HasCPUIDFlag	(	uint	type,
		uint	index,
		uint	bit
	)

Check whether the current CPU has the given flag.

Parameters

type	The type to be passing to cpuid (usually 1).
index	The index in the returned info array.
bit	The bit index that needs to be set.

Returns

The value of the bit, or false when there is no CPUID or the type is not available.

Definition at line 84 of file cpu.cpp.

References HasBit(), and ottd_cpuid().

ottd_cpuid()

void ottd_cpuid	(	int	info[4],
		int	type
	)

Get the CPUID information from the CPU.

Parameters

info	The retrieved info. All zeros on architectures without CPUID.
type	The information this instruction should retrieve.

Get the CPUID information from the CPU.

MSVC offers cpu information while gcc only implements in gcc 4.8 __builtin_cpu_supports and friends http://msdn.microsoft.com/library/vstudio/hskdteyh%28v=vs.100%29.aspx http://gcc.gnu.org/onlinedocs/gcc/X86-Built-in-Functions.html

Other platforms/architectures don't have CPUID, so zero the info and then most (if not all) of the features are set as if they do not exist.

Definition at line 78 of file cpu.cpp.

Referenced by HasCPUIDFlag().