[Bug fortran/48426] New: [patch] Quad precision promotion

[inform at tiker dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48426

           Summary: [patch] Quad precision promotion
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: inform@tiker.net


The attached patch implements the options

-finteger4-integer-8
-freal-4-real-8
-freal-4-real-10
-freal-4-real-16
-freal-8-real-4
-freal-8-real-10
-freal-8-real-16

to implement a variety of automatic type promotions. (This is particularly
helpful if one wants to quickly check whether a certain code has a bug limiting
its precision away from full machine accuracy.)

A similar promotion feature is available in Fujitsu compilers, see here:

http://www.lahey.com/docs/fujitsu%20compiler%20option%20list.pdf

(e.g. -CcR8R16)

I submitted this patch before, but it seems to have gotten lost in Bugzilla.
The implementation work on this was done by Zydrunas Gimbutas, not by me.
Zydrunas has authorized me to submit this for inclusion in gcc.