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Diffstat (limited to 'ChangeLog')
| -rw-r--r-- | ChangeLog | 24 |
1 files changed, 24 insertions, 0 deletions
@@ -1,3 +1,27 @@ +2009-10-29 Don Porter <dgp@users.sourceforge.net> + + * generic/tcl.h: Changed the typedef for the mp_digit type + from: + typedef unsigned long mp_digit; + to: + typedef unsigned int mp_digit; + For 32-bit builds where "long" and "int" are two names for the same + thing, this is no change at all. For 64-bit builds, though, this + causes the dp[] array of an mp_int to be made up of 32-bit elements + instead of 64-bit elements. This is a huge improvement because details + elsewhere in the mp_int implementation cause only 28 bits of each + element to be actually used storing number data. Without this change + bignums are over 50% wasted space on 64-bit systems. [Bug 2800740]. + + ***POTENTIAL INCOMPATIBILITY*** + For 64-bit builds, callers of routines with (mp_digit) or (mp_digit *) + arguments *will*, and callers of routines with (mp_int *) arguments + *may* suffer both binary and stubs incompatibilities with Tcl releases + 8.5.0 - 8.5.7. Such possibilities should be checked, and if such + incompatibilities are present, suitable [package require] requirements + on the Tcl release should be put in place to keep such built code + [load]-ing only in Tcl interps that are compatible. + 2009-10-29 Kevin B. Kenny <kennykb@acm.org> * library/clock.tcl (LocalizeFormat): |