Commit ca9cda2f authored by Ingo Molnar's avatar Ingo Molnar

x86: add comments to processor.h

add comments to the FPU structures of processor.h.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent e104383f
......@@ -289,42 +289,47 @@ struct orig_ist {
#define MXCSR_DEFAULT 0x1f80
struct i387_fsave_struct {
u32 cwd;
u32 swd;
u32 twd;
u32 fip;
u32 fcs;
u32 foo;
u32 fos;
u32 cwd; /* FPU Control Word */
u32 swd; /* FPU Status Word */
u32 twd; /* FPU Tag Word */
u32 fip; /* FPU IP Offset */
u32 fcs; /* FPU IP Selector */
u32 foo; /* FPU Operand Pointer Offset */
u32 fos; /* FPU Operand Pointer Selector */
/* 8*10 bytes for each FP-reg = 80 bytes: */
u32 st_space[20];
/* Software status information: */
/* Software status information [not touched by FSAVE ]: */
u32 status;
};
struct i387_fxsave_struct {
u16 cwd;
u16 swd;
u16 twd;
u16 fop;
u16 cwd; /* Control Word */
u16 swd; /* Status Word */
u16 twd; /* Tag Word */
u16 fop; /* Last Instruction Opcode */
union {
struct {
u64 rip;
u64 rdp;
u64 rip; /* Instruction Pointer */
u64 rdp; /* Data Pointer */
};
struct {
u32 fip;
u32 fcs;
u32 foo;
u32 fos;
u32 fip; /* FPU IP Offset */
u32 fcs; /* FPU IP Selector */
u32 foo; /* FPU Operand Offset */
u32 fos; /* FPU Operand Selector */
};
};
u32 mxcsr;
u32 mxcsr_mask;
u32 mxcsr; /* MXCSR Register State */
u32 mxcsr_mask; /* MXCSR Mask */
/* 8*16 bytes for each FP-reg = 128 bytes: */
u32 st_space[32];
/* 16*16 bytes for each XMM-reg = 256 bytes: */
u32 xmm_space[64];
u32 padding[24];
} __attribute__((aligned(16)));
......
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