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AMD Geode™ LX Processors Data Book 203
CPU Core Register Descriptions
33234H
5.5.2.117 FPU x87 Control Word MSR (FPU_CW_MSR)
5.5.2.118 FPU x87 Status Word MSR (FPU_SW_MSR)
5.5.2.119 FPU x87 Tag Word MSR (FPU_TW_MSR)
MSR Address 00001A10h
Typ e R /W
Reset Value 00000000_00000040h
FPU_CW_MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
313029282726252423222120191817161514131211109876543210
RSVD FPU_CW
FPU_CW_MSR Bit Descriptions
Bit Name Description
63:12 RSVD Reserved. Write as read.
11:0 FPU_CW FPU Control Word.
MSR Address 00001A11h
Typ e R /W
Reset Value 00000000_00000000h
FPU_SW_MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
313029282726252423222120191817161514131211109876543210
RSVD FPU_SW
FPU_SW_MSR Bit Descriptions
Bit Name Description
63:16 RSVD Reserved. Write as read.
15:0 FPU_SW FPU Status Word.
MSR Address 00001A12h
Typ e R /W
Reset Value 00000000_00000000h
FPU_TW_MSR Register Map
63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32
RSVD
313029282726252423222120191817161514131211109876543210
RSVD FPU_TW