Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!bloom-beacon!husc6!ogccse!littlei!guardian!alfred
From: alfred@guardian.UUCP (alfred)
Newsgroups: comp.sys.intel
Subject: Re: PLM vs. C for 80286/80386
Keywords: PLM C
Message-ID: <231@guardian.UUCP>
Date: 14 Jun 89 20:23:57 GMT
References: <598@philtis.UUCP> <14381@bfmny0.UUCP> <1765@auspex.auspex.com> <14386@bfmny0.UUCP>
Reply-To: alfred@.UUCP (Alfred Huang)
Organization: Intel Corp., Development Tools Operation
Lines: 12

> >I sincerely hope Intel's C compiler does not do so for *all* "switch"
> >statements; any competent C compiler can and will turn a "dense"
> >"switch" statement - i.e., one where the cases form a reasonably tight
> >range - into an indexded jump.  (The definition of "dense" varies from
> >compiler to compiler.)

Intel iC-n86 compilers are capable of generating three different kind of
code for the "switch" statement. Normally, we generate simple if-then-else
code for a dense switch statement with less than six cases, above that
an indexed jump will be generated. Moreover, we generate binary search code
for those sparsely dense switch statements. And in conformance to ANSI,
32-bit "long" data type can be used as case values.