TotalView Reference Guide : Part III: Platforms and Operating Systems : Architectures : AMD and Intel x86-64 : x86-64 FPCR Register
x86-64 FPCR Register
For your convenience, TotalView interprets the bit settings of the FPCR and FPSR registers.
You can edit the value of the FPCR and set it to any of the bit settings outlined in the next table.
 
Value
Bit Setting
Meaning
RC=RN
0x0000
To nearest rounding mode
RC=R-
0x2000
Toward negative infinity rounding mode
RC=R+
0x4000
Toward positive infinity rounding mode
RC=RZ
0x6000
Toward zero rounding mode
PC=SGL
0x0000
Single-precision rounding
PC=DBL
0x0080
Double-precision rounding
PC=EXT
0x00c0
Extended-precision rounding
EM=PM
0x0020
Precision exception enable
EM=UM
0x0010
Underflow exception enable
EM=OM
0x0008
Overflow exception enable
EM=ZM
0x0004
Zero-divide exception enable
EM=DM
0x0002
Denormalized operand exception enable
EM=IM
0x0001
Invalid operation exception enable