FPU::State Struct Reference
512 byte structure for FPU / MMX / SSE registers corresponds to the layout used by the instructions fxsave and fxrstor.
More...
#include <machine/fpu.h>
Collaboration diagram for FPU::State:Classes | |
| struct | ST |
| 80 bit registers for FPU stack / MMX More... | |
| struct | XMM |
| 128 bit SSE registers More... | |
Public Member Functions | |
| void | init () |
| Set structure to the initial FPU state Clears the FPU state (but its not just zeroed!) | |
| void | save () |
| Save the current FPU (+ MMX + SSE) state into this structure. More... | |
| void | restore () |
| Restore the saved FPU (+ MMX + SSE) state from this structure. More... | |
Public Attributes | |
| uint16_t | fcw |
| FPU Control Word. | |
| uint16_t | fsw |
| FPU Status Word. | |
| uint8_t | ftw |
| FPU Tag Word. | |
| uint16_t | __pad0__: 0 |
| (16 bit alignment) | |
| uint16_t | fop |
| FPU Opcode. | |
| union { | |
| uint64_t | ip |
| struct { | |
| uint32_t | ip_off |
| uint32_t | ip_seg |
| } | |
| }; | |
| union { | |
| uint64_t | dp |
| struct { | |
| uint32_t | dp_off |
| uint32_t | dp_seg |
| } | |
| }; | |
| uint32_t | mxcsr |
| uint32_t | mxcsr_mask |
| struct { | |
| ST | value |
| uint64_t | __pad0__: 48 |
| } | st [8] |
| XMM | xmm [16] |
| uint64_t | reserved [12] |
| (reserved) | |
Detailed Description
512 byte structure for FPU / MMX / SSE registers corresponds to the layout used by the instructions fxsave and fxrstor.
Class Documentation
| struct FPU::State::ST |
Member Function Documentation
|
inline |
Save the current FPU (+ MMX + SSE) state into this structure.
- Note
- Structure has to be 16 byte aligned
|
inline |
Restore the saved FPU (+ MMX + SSE) state from this structure.
- Note
- Structure has to be 16 byte aligned
The documentation for this struct was generated from the following files:
- machine/fpu.h
- machine/fpu.cc