union _AMD64_MXCSR_REG { unsigned long Value;/* 0x0 4 */ struct { unsigned long IE : 1;/* 0x0:0 4 */ unsigned long DE : 1;/* 0x0:1 4 */ unsigned long ZE : 1;/* 0x0:2 4 */ unsigned long OE : 1;/* 0x0:3 4 */ unsigned long UE : 1;/* 0x0:4 4 */ unsigned long PE : 1;/* 0x0:5 4 */ unsigned long DAZ : 1;/* 0x0:6 4 */ unsigned long IM : 1;/* 0x0:7 4 */ unsigned long DM : 1;/* 0x0:8 4 */ unsigned long ZM : 1;/* 0x0:9 4 */ unsigned long OM : 1;/* 0x0:10 4 */ unsigned long UM : 1;/* 0x0:11 4 */ unsigned long PM : 1;/* 0x0:12 4 */ unsigned long RC : 2;/* 0x0:13 4 */ unsigned long FZ : 1;/* 0x0:15 4 */ unsigned long res : 16;/* 0x0:16 4 */ };/* 0x0 4 */};size 4 (0x4)17 members0 holespadding 01 cacheline
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