Pctx Register Fields - Compaq AlphaServer ES45 Service Manual

Table D–9 PCTX Register Fields (Continued)
Name
FPE
PPCE
D-22 ES45 Service Guide
Extent Type Description
<2> RW,1 Floating-point enable—if clear, floating-
point instructions generate FEN
exceptions. This bit is set by hardware on
reset.
<1> RW Process performance counting enable.
Enables performance counting for an
individual process with counters PCTR0 or
PCTR1, which are enabled by setting
PCT0_EN or PCT1_EN, respectively.
Performance counting for the entire
system can be enabled by setting
I_CTL<SPCE>.