John Regehr wrote:
microcontroller compilers support - the ability to write things like
"if (CARRY) ..." can be a big win for some code.
A killer app for exposing some of the condition code flags to C may be
that this facilitates very efficient integer over/under flow detection.
Integer overflows are the source of many nasty security holes.
I missed the earlier comments on this, but isn't getting to the
condition codes a simple library of inline asm functions? Am I
over-simplifying?
Of course, there are plenty of ways that could screw up optimization
(unless optimization is oblivious, in which case optimizer code motion
destroys the flag you are after.)
-dave
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