Intel 253666-024US User Manual
Page 359
Vol. 2A 3-313
INSTRUCTION SET REFERENCE, A-M
FCOS—Cosine
ST(0) ← cosine(ST(0));
ELSE (* Source operand is out-of-range *)
C2 ← 1;
FI;
FPU Flags Affected
C1
Set to 0 if stack underflow occurred.
Set if result was rounded up; cleared otherwise.
Undefined if C2 is 1.
C2
Set to 1 if outside range (−2
63
< source operand < +2
63
); other-
wise, set to 0.
C0, C3
Undefined.
Floating-Point Exceptions
#IS
Stack underflow occurred.
#IA
Source operand is an SNaN value, ∞, or unsupported format.
#D
Source is a denormal value.
#P
Value cannot be represented exactly in destination format.
Protected Mode Exceptions
#NM
CR0.EM[bit 2] or CR0.TS[bit 3] = 1.
#MF
If there is a pending x87 FPU exception.
#UD
If the LOCK prefix is used.
Real-Address Mode Exceptions
Same exceptions as in protected mode.
Virtual-8086 Mode Exceptions
Same exceptions as in protected mode.
Compatibility Mode Exceptions
Same exceptions as in protected mode.
64-Bit Mode Exceptions
Same exceptions as in protected mode.