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INSTRUCTION SET REFERENCE
RCPPS—Packed Single-FP Reciprocal (Continued)
Exceptions
General protection exception if not aligned on 16-byte boundary, regardless of segment.
Numeric Exceptions
None.
Protected Mode Exceptions
#GP(0)
For an illegal memory operand effective address in the CS, DS, ES, FS, or
GS segments.
#SS(0)
For an illegal address in the SS segment.
#PF(fault-code) For a page fault.
#UD
If CR0.EM = 1.
#NM
If TS bit in CR0 is set.
Real Address Mode Exceptions
Interrupt 13
If any part of the operand would lie outside of the effective address space
from 0 to 0FFFFH.
#UD
If CR0.EM = 1.
#NM
If TS bit in CR0 is set.
Virtual 8086 Mode Exceptions
Same exceptions as in Real Address Mode.
#PF(fault-code) For a page fault.
Comments
RCPPS is not affected by the rounding control in MXCSR. Denormal inputs are treated as zeroes
(of the same sign) and underflow results are always flushed to zero, with the sign of the operand.
