Union x86_64_xsave::fxsave::domain::floating_point_unit_data_pointer_offset::FloatingPointUnitDataPointerOffset

#[repr(C)]
pub union FloatingPointUnitDataPointerOffset {
    pub mode_16_bit: FloatingPointUnitDataPointerOffset16Bit,
    pub mode_32_bit: FloatingPointUnitDataPointerOffset32Bit,
    pub mode_64_bit_without_rex_w: FloatingPointUnitDataPointerOffset32Bit,
    pub mode_64_bit_with_rex_w: FloatingPointUnitDataPointerOffset64BitWithRexW,
}

x87 FPU Data Pointer Offset, FDP.

The contents of this field differ depending on the current addressing mode (32-bit, 16-bit, or 64-bit) of the processor when the FXSAVE instruction was executed:-

• 16-bit mode: low 16 bits are instruction data (DP) offset; high 16 bits are reserved, and, potentially, 16-bit selector (segment)
• 32-bit mode: 32-bit instruction data (DP) offset.
• 64-bit mode without REX.W, or REX.W == 0: 32-bit instruction data (DP) offset, and, potentially, 16-bit selector (segment).
• 64-bit mode with REX.W: 64-bit instruction data (DP) offset.

See “x87 FPU Instruction and Operand (Data) Pointers” in Chapter 8 of the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 1, for a description of the x87 FPU Data Pointer.

Fields

mode_16_bit: FloatingPointUnitDataPointerOffset16Bit

16-bit mode: low 16 bits are data pointer (DP) offset; high 16 bits are reserved, and, potentially, 16-bit selector (segment).

mode_32_bit: FloatingPointUnitDataPointerOffset32Bit

32-bit mode: 32-bit data pointer (DP) offset, and, potentially, 16-bit selector (segment).

mode_64_bit_without_rex_w: FloatingPointUnitDataPointerOffset32Bit

64-bit mode without REX.W or REX.W == 0: 32-bit data pointer (DP) offset, and, potentially, 16-bit selector (segment).

mode_64_bit_with_rex_w: FloatingPointUnitDataPointerOffset64BitWithRexW

64-bit mode with REX.W: 64-bit data pointer (DP) offset.

Trait Implementations

impl Clone for FloatingPointUnitDataPointerOffset

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for FloatingPointUnitDataPointerOffset

fn default() -> Self

Returns the "default value" for a type.

impl Debug for FloatingPointUnitDataPointerOffset

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.